forked from Minki/linux
db89b4f0db
Catch attempts to use of acpi_driver_data on pointers of wrong type. akpm: rewritten to use proper C typechecking and remove the "function"-used-as-lvalue thing. Signed-off-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
1881 lines
48 KiB
C
1881 lines
48 KiB
C
/*
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* acpi_thermal.c - ACPI Thermal Zone Driver ($Revision: 41 $)
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*
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* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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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; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This driver fully implements the ACPI thermal policy as described in the
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* ACPI 2.0 Specification.
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*
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* TBD: 1. Implement passive cooling hysteresis.
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* 2. Enhance passive cooling (CPU) states/limit interface to support
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* concepts of 'multiple limiters', upper/lower limits, etc.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/dmi.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/proc_fs.h>
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#include <linux/timer.h>
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#include <linux/jiffies.h>
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#include <linux/kmod.h>
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#include <linux/seq_file.h>
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#include <linux/reboot.h>
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#include <asm/uaccess.h>
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#include <linux/thermal.h>
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#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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#define ACPI_THERMAL_COMPONENT 0x04000000
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#define ACPI_THERMAL_CLASS "thermal_zone"
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#define ACPI_THERMAL_DEVICE_NAME "Thermal Zone"
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#define ACPI_THERMAL_FILE_STATE "state"
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#define ACPI_THERMAL_FILE_TEMPERATURE "temperature"
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#define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points"
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#define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode"
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#define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency"
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#define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80
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#define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81
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#define ACPI_THERMAL_NOTIFY_DEVICES 0x82
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#define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0
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#define ACPI_THERMAL_NOTIFY_HOT 0xF1
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#define ACPI_THERMAL_MODE_ACTIVE 0x00
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#define ACPI_THERMAL_MAX_ACTIVE 10
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#define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65
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#define _COMPONENT ACPI_THERMAL_COMPONENT
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ACPI_MODULE_NAME("thermal");
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MODULE_AUTHOR("Paul Diefenbaugh");
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MODULE_DESCRIPTION("ACPI Thermal Zone Driver");
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MODULE_LICENSE("GPL");
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static int act;
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module_param(act, int, 0644);
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MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.");
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static int crt;
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module_param(crt, int, 0644);
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MODULE_PARM_DESC(crt, "Disable or lower all critical trip points.");
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static int tzp;
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module_param(tzp, int, 0444);
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MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.");
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static int nocrt;
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module_param(nocrt, int, 0);
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MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points.");
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static int off;
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module_param(off, int, 0);
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MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.");
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static int psv;
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module_param(psv, int, 0644);
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MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
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static int acpi_thermal_add(struct acpi_device *device);
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static int acpi_thermal_remove(struct acpi_device *device, int type);
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static int acpi_thermal_resume(struct acpi_device *device);
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static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file);
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static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file);
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static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file);
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static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file);
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static ssize_t acpi_thermal_write_cooling_mode(struct file *,
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const char __user *, size_t,
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loff_t *);
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static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file);
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static ssize_t acpi_thermal_write_polling(struct file *, const char __user *,
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size_t, loff_t *);
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static const struct acpi_device_id thermal_device_ids[] = {
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{ACPI_THERMAL_HID, 0},
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{"", 0},
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};
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MODULE_DEVICE_TABLE(acpi, thermal_device_ids);
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static struct acpi_driver acpi_thermal_driver = {
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.name = "thermal",
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.class = ACPI_THERMAL_CLASS,
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.ids = thermal_device_ids,
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.ops = {
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.add = acpi_thermal_add,
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.remove = acpi_thermal_remove,
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.resume = acpi_thermal_resume,
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},
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};
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struct acpi_thermal_state {
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u8 critical:1;
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u8 hot:1;
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u8 passive:1;
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u8 active:1;
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u8 reserved:4;
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int active_index;
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};
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struct acpi_thermal_state_flags {
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u8 valid:1;
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u8 enabled:1;
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u8 reserved:6;
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};
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struct acpi_thermal_critical {
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struct acpi_thermal_state_flags flags;
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unsigned long temperature;
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};
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struct acpi_thermal_hot {
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struct acpi_thermal_state_flags flags;
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unsigned long temperature;
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};
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struct acpi_thermal_passive {
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struct acpi_thermal_state_flags flags;
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unsigned long temperature;
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unsigned long tc1;
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unsigned long tc2;
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unsigned long tsp;
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struct acpi_handle_list devices;
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};
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struct acpi_thermal_active {
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struct acpi_thermal_state_flags flags;
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unsigned long temperature;
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struct acpi_handle_list devices;
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};
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struct acpi_thermal_trips {
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struct acpi_thermal_critical critical;
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struct acpi_thermal_hot hot;
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struct acpi_thermal_passive passive;
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struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE];
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};
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struct acpi_thermal_flags {
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u8 cooling_mode:1; /* _SCP */
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u8 devices:1; /* _TZD */
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u8 reserved:6;
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};
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struct acpi_thermal {
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struct acpi_device * device;
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acpi_bus_id name;
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unsigned long temperature;
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unsigned long last_temperature;
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unsigned long polling_frequency;
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volatile u8 zombie;
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struct acpi_thermal_flags flags;
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struct acpi_thermal_state state;
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struct acpi_thermal_trips trips;
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struct acpi_handle_list devices;
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struct timer_list timer;
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struct thermal_zone_device *thermal_zone;
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int tz_enabled;
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struct mutex lock;
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};
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static const struct file_operations acpi_thermal_state_fops = {
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.owner = THIS_MODULE,
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.open = acpi_thermal_state_open_fs,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static const struct file_operations acpi_thermal_temp_fops = {
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.owner = THIS_MODULE,
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.open = acpi_thermal_temp_open_fs,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static const struct file_operations acpi_thermal_trip_fops = {
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.owner = THIS_MODULE,
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.open = acpi_thermal_trip_open_fs,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static const struct file_operations acpi_thermal_cooling_fops = {
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.owner = THIS_MODULE,
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.open = acpi_thermal_cooling_open_fs,
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.read = seq_read,
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.write = acpi_thermal_write_cooling_mode,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static const struct file_operations acpi_thermal_polling_fops = {
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.owner = THIS_MODULE,
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.open = acpi_thermal_polling_open_fs,
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.read = seq_read,
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.write = acpi_thermal_write_polling,
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.llseek = seq_lseek,
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.release = single_release,
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};
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/* --------------------------------------------------------------------------
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Thermal Zone Management
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-------------------------------------------------------------------------- */
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static int acpi_thermal_get_temperature(struct acpi_thermal *tz)
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{
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acpi_status status = AE_OK;
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if (!tz)
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return -EINVAL;
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tz->last_temperature = tz->temperature;
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status =
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acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tz->temperature);
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if (ACPI_FAILURE(status))
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return -ENODEV;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n",
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tz->temperature));
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return 0;
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}
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static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz)
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{
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acpi_status status = AE_OK;
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if (!tz)
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return -EINVAL;
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status =
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acpi_evaluate_integer(tz->device->handle, "_TZP", NULL,
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&tz->polling_frequency);
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if (ACPI_FAILURE(status))
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return -ENODEV;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n",
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tz->polling_frequency));
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return 0;
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}
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static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds)
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{
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if (!tz)
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return -EINVAL;
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tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"Polling frequency set to %lu seconds\n",
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tz->polling_frequency/10));
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return 0;
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}
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static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode)
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{
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acpi_status status = AE_OK;
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union acpi_object arg0 = { ACPI_TYPE_INTEGER };
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struct acpi_object_list arg_list = { 1, &arg0 };
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acpi_handle handle = NULL;
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if (!tz)
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return -EINVAL;
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status = acpi_get_handle(tz->device->handle, "_SCP", &handle);
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if (ACPI_FAILURE(status)) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n"));
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return -ENODEV;
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}
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arg0.integer.value = mode;
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status = acpi_evaluate_object(handle, NULL, &arg_list, NULL);
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if (ACPI_FAILURE(status))
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return -ENODEV;
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return 0;
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}
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#define ACPI_TRIPS_CRITICAL 0x01
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#define ACPI_TRIPS_HOT 0x02
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#define ACPI_TRIPS_PASSIVE 0x04
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#define ACPI_TRIPS_ACTIVE 0x08
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#define ACPI_TRIPS_DEVICES 0x10
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#define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE)
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#define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES
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#define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \
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ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \
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ACPI_TRIPS_DEVICES)
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/*
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* This exception is thrown out in two cases:
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* 1.An invalid trip point becomes invalid or a valid trip point becomes invalid
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* when re-evaluating the AML code.
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* 2.TODO: Devices listed in _PSL, _ALx, _TZD may change.
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* We need to re-bind the cooling devices of a thermal zone when this occurs.
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*/
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#define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \
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do { \
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if (flags != ACPI_TRIPS_INIT) \
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ACPI_EXCEPTION((AE_INFO, AE_ERROR, \
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"ACPI thermal trip point %s changed\n" \
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"Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \
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} while (0)
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static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
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{
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acpi_status status = AE_OK;
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struct acpi_handle_list devices;
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int valid = 0;
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int i;
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/* Critical Shutdown (required) */
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if (flag & ACPI_TRIPS_CRITICAL) {
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status = acpi_evaluate_integer(tz->device->handle,
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"_CRT", NULL, &tz->trips.critical.temperature);
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/*
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* Treat freezing temperatures as invalid as well; some
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* BIOSes return really low values and cause reboots at startup.
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* Below zero (Celcius) values clearly aren't right for sure..
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* ... so lets discard those as invalid.
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*/
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if (ACPI_FAILURE(status) ||
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tz->trips.critical.temperature <= 2732) {
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tz->trips.critical.flags.valid = 0;
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ACPI_EXCEPTION((AE_INFO, status,
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"No or invalid critical threshold"));
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return -ENODEV;
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} else {
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tz->trips.critical.flags.valid = 1;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"Found critical threshold [%lu]\n",
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tz->trips.critical.temperature));
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}
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if (tz->trips.critical.flags.valid == 1) {
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if (crt == -1) {
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tz->trips.critical.flags.valid = 0;
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} else if (crt > 0) {
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unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
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/*
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* Allow override to lower critical threshold
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*/
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if (crt_k < tz->trips.critical.temperature)
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tz->trips.critical.temperature = crt_k;
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}
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}
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}
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/* Critical Sleep (optional) */
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if (flag & ACPI_TRIPS_HOT) {
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status = acpi_evaluate_integer(tz->device->handle,
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"_HOT", NULL, &tz->trips.hot.temperature);
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if (ACPI_FAILURE(status)) {
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tz->trips.hot.flags.valid = 0;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"No hot threshold\n"));
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} else {
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tz->trips.hot.flags.valid = 1;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"Found hot threshold [%lu]\n",
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tz->trips.critical.temperature));
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}
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}
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/* Passive (optional) */
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if (flag & ACPI_TRIPS_PASSIVE) {
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valid = tz->trips.passive.flags.valid;
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if (psv == -1) {
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status = AE_SUPPORT;
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} else if (psv > 0) {
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tz->trips.passive.temperature = CELSIUS_TO_KELVIN(psv);
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status = AE_OK;
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} else {
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status = acpi_evaluate_integer(tz->device->handle,
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"_PSV", NULL, &tz->trips.passive.temperature);
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}
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if (ACPI_FAILURE(status))
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tz->trips.passive.flags.valid = 0;
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else {
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tz->trips.passive.flags.valid = 1;
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if (flag == ACPI_TRIPS_INIT) {
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status = acpi_evaluate_integer(
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tz->device->handle, "_TC1",
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NULL, &tz->trips.passive.tc1);
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if (ACPI_FAILURE(status))
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tz->trips.passive.flags.valid = 0;
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status = acpi_evaluate_integer(
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tz->device->handle, "_TC2",
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NULL, &tz->trips.passive.tc2);
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if (ACPI_FAILURE(status))
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tz->trips.passive.flags.valid = 0;
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status = acpi_evaluate_integer(
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tz->device->handle, "_TSP",
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NULL, &tz->trips.passive.tsp);
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if (ACPI_FAILURE(status))
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tz->trips.passive.flags.valid = 0;
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}
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}
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}
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if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) {
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memset(&devices, 0, sizeof(struct acpi_handle_list));
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status = acpi_evaluate_reference(tz->device->handle, "_PSL",
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NULL, &devices);
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if (ACPI_FAILURE(status))
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tz->trips.passive.flags.valid = 0;
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else
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tz->trips.passive.flags.valid = 1;
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if (memcmp(&tz->trips.passive.devices, &devices,
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sizeof(struct acpi_handle_list))) {
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memcpy(&tz->trips.passive.devices, &devices,
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sizeof(struct acpi_handle_list));
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ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
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}
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}
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if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
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if (valid != tz->trips.passive.flags.valid)
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ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
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}
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/* Active (optional) */
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for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
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char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
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valid = tz->trips.active[i].flags.valid;
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if (act == -1)
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break; /* disable all active trip points */
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if (flag & ACPI_TRIPS_ACTIVE) {
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status = acpi_evaluate_integer(tz->device->handle,
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name, NULL, &tz->trips.active[i].temperature);
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if (ACPI_FAILURE(status)) {
|
|
tz->trips.active[i].flags.valid = 0;
|
|
if (i == 0)
|
|
break;
|
|
if (act <= 0)
|
|
break;
|
|
if (i == 1)
|
|
tz->trips.active[0].temperature =
|
|
CELSIUS_TO_KELVIN(act);
|
|
else
|
|
/*
|
|
* Don't allow override higher than
|
|
* the next higher trip point
|
|
*/
|
|
tz->trips.active[i - 1].temperature =
|
|
(tz->trips.active[i - 2].temperature <
|
|
CELSIUS_TO_KELVIN(act) ?
|
|
tz->trips.active[i - 2].temperature :
|
|
CELSIUS_TO_KELVIN(act));
|
|
break;
|
|
} else
|
|
tz->trips.active[i].flags.valid = 1;
|
|
}
|
|
|
|
name[2] = 'L';
|
|
if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) {
|
|
memset(&devices, 0, sizeof(struct acpi_handle_list));
|
|
status = acpi_evaluate_reference(tz->device->handle,
|
|
name, NULL, &devices);
|
|
if (ACPI_FAILURE(status))
|
|
tz->trips.active[i].flags.valid = 0;
|
|
else
|
|
tz->trips.active[i].flags.valid = 1;
|
|
|
|
if (memcmp(&tz->trips.active[i].devices, &devices,
|
|
sizeof(struct acpi_handle_list))) {
|
|
memcpy(&tz->trips.active[i].devices, &devices,
|
|
sizeof(struct acpi_handle_list));
|
|
ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
|
|
}
|
|
}
|
|
if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
|
|
if (valid != tz->trips.active[i].flags.valid)
|
|
ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
|
|
|
|
if (!tz->trips.active[i].flags.valid)
|
|
break;
|
|
}
|
|
|
|
if (flag & ACPI_TRIPS_DEVICES) {
|
|
memset(&devices, 0, sizeof(struct acpi_handle_list));
|
|
status = acpi_evaluate_reference(tz->device->handle, "_TZD",
|
|
NULL, &devices);
|
|
if (memcmp(&tz->devices, &devices,
|
|
sizeof(struct acpi_handle_list))) {
|
|
memcpy(&tz->devices, &devices,
|
|
sizeof(struct acpi_handle_list));
|
|
ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
|
|
{
|
|
return acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
|
|
}
|
|
|
|
static int acpi_thermal_critical(struct acpi_thermal *tz)
|
|
{
|
|
if (!tz || !tz->trips.critical.flags.valid)
|
|
return -EINVAL;
|
|
|
|
if (tz->temperature >= tz->trips.critical.temperature) {
|
|
printk(KERN_WARNING PREFIX "Critical trip point\n");
|
|
tz->trips.critical.flags.enabled = 1;
|
|
} else if (tz->trips.critical.flags.enabled)
|
|
tz->trips.critical.flags.enabled = 0;
|
|
|
|
acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL,
|
|
tz->trips.critical.flags.enabled);
|
|
acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
|
|
tz->device->dev.bus_id,
|
|
ACPI_THERMAL_NOTIFY_CRITICAL,
|
|
tz->trips.critical.flags.enabled);
|
|
|
|
/* take no action if nocrt is set */
|
|
if(!nocrt) {
|
|
printk(KERN_EMERG
|
|
"Critical temperature reached (%ld C), shutting down.\n",
|
|
KELVIN_TO_CELSIUS(tz->temperature));
|
|
orderly_poweroff(true);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_hot(struct acpi_thermal *tz)
|
|
{
|
|
if (!tz || !tz->trips.hot.flags.valid)
|
|
return -EINVAL;
|
|
|
|
if (tz->temperature >= tz->trips.hot.temperature) {
|
|
printk(KERN_WARNING PREFIX "Hot trip point\n");
|
|
tz->trips.hot.flags.enabled = 1;
|
|
} else if (tz->trips.hot.flags.enabled)
|
|
tz->trips.hot.flags.enabled = 0;
|
|
|
|
acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_HOT,
|
|
tz->trips.hot.flags.enabled);
|
|
acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
|
|
tz->device->dev.bus_id,
|
|
ACPI_THERMAL_NOTIFY_HOT,
|
|
tz->trips.hot.flags.enabled);
|
|
|
|
/* TBD: Call user-mode "sleep(S4)" function if nocrt is cleared */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void acpi_thermal_passive(struct acpi_thermal *tz)
|
|
{
|
|
int result = 1;
|
|
struct acpi_thermal_passive *passive = NULL;
|
|
int trend = 0;
|
|
int i = 0;
|
|
|
|
|
|
if (!tz || !tz->trips.passive.flags.valid)
|
|
return;
|
|
|
|
passive = &(tz->trips.passive);
|
|
|
|
/*
|
|
* Above Trip?
|
|
* -----------
|
|
* Calculate the thermal trend (using the passive cooling equation)
|
|
* and modify the performance limit for all passive cooling devices
|
|
* accordingly. Note that we assume symmetry.
|
|
*/
|
|
if (tz->temperature >= passive->temperature) {
|
|
trend =
|
|
(passive->tc1 * (tz->temperature - tz->last_temperature)) +
|
|
(passive->tc2 * (tz->temperature - passive->temperature));
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"trend[%d]=(tc1[%lu]*(tmp[%lu]-last[%lu]))+(tc2[%lu]*(tmp[%lu]-psv[%lu]))\n",
|
|
trend, passive->tc1, tz->temperature,
|
|
tz->last_temperature, passive->tc2,
|
|
tz->temperature, passive->temperature));
|
|
passive->flags.enabled = 1;
|
|
/* Heating up? */
|
|
if (trend > 0)
|
|
for (i = 0; i < passive->devices.count; i++)
|
|
acpi_processor_set_thermal_limit(passive->
|
|
devices.
|
|
handles[i],
|
|
ACPI_PROCESSOR_LIMIT_INCREMENT);
|
|
/* Cooling off? */
|
|
else if (trend < 0) {
|
|
for (i = 0; i < passive->devices.count; i++)
|
|
/*
|
|
* assume that we are on highest
|
|
* freq/lowest thrott and can leave
|
|
* passive mode, even in error case
|
|
*/
|
|
if (!acpi_processor_set_thermal_limit
|
|
(passive->devices.handles[i],
|
|
ACPI_PROCESSOR_LIMIT_DECREMENT))
|
|
result = 0;
|
|
/*
|
|
* Leave cooling mode, even if the temp might
|
|
* higher than trip point This is because some
|
|
* machines might have long thermal polling
|
|
* frequencies (tsp) defined. We will fall back
|
|
* into passive mode in next cycle (probably quicker)
|
|
*/
|
|
if (result) {
|
|
passive->flags.enabled = 0;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Disabling passive cooling, still above threshold,"
|
|
" but we are cooling down\n"));
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Below Trip?
|
|
* -----------
|
|
* Implement passive cooling hysteresis to slowly increase performance
|
|
* and avoid thrashing around the passive trip point. Note that we
|
|
* assume symmetry.
|
|
*/
|
|
if (!passive->flags.enabled)
|
|
return;
|
|
for (i = 0; i < passive->devices.count; i++)
|
|
if (!acpi_processor_set_thermal_limit
|
|
(passive->devices.handles[i],
|
|
ACPI_PROCESSOR_LIMIT_DECREMENT))
|
|
result = 0;
|
|
if (result) {
|
|
passive->flags.enabled = 0;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Disabling passive cooling (zone is cool)\n"));
|
|
}
|
|
}
|
|
|
|
static void acpi_thermal_active(struct acpi_thermal *tz)
|
|
{
|
|
int result = 0;
|
|
struct acpi_thermal_active *active = NULL;
|
|
int i = 0;
|
|
int j = 0;
|
|
unsigned long maxtemp = 0;
|
|
|
|
|
|
if (!tz)
|
|
return;
|
|
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
|
|
active = &(tz->trips.active[i]);
|
|
if (!active || !active->flags.valid)
|
|
break;
|
|
if (tz->temperature >= active->temperature) {
|
|
/*
|
|
* Above Threshold?
|
|
* ----------------
|
|
* If not already enabled, turn ON all cooling devices
|
|
* associated with this active threshold.
|
|
*/
|
|
if (active->temperature > maxtemp)
|
|
tz->state.active_index = i;
|
|
maxtemp = active->temperature;
|
|
if (active->flags.enabled)
|
|
continue;
|
|
for (j = 0; j < active->devices.count; j++) {
|
|
result =
|
|
acpi_bus_set_power(active->devices.
|
|
handles[j],
|
|
ACPI_STATE_D0);
|
|
if (result) {
|
|
printk(KERN_WARNING PREFIX
|
|
"Unable to turn cooling device [%p] 'on'\n",
|
|
active->devices.
|
|
handles[j]);
|
|
continue;
|
|
}
|
|
active->flags.enabled = 1;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Cooling device [%p] now 'on'\n",
|
|
active->devices.handles[j]));
|
|
}
|
|
continue;
|
|
}
|
|
if (!active->flags.enabled)
|
|
continue;
|
|
/*
|
|
* Below Threshold?
|
|
* ----------------
|
|
* Turn OFF all cooling devices associated with this
|
|
* threshold.
|
|
*/
|
|
for (j = 0; j < active->devices.count; j++) {
|
|
result = acpi_bus_set_power(active->devices.handles[j],
|
|
ACPI_STATE_D3);
|
|
if (result) {
|
|
printk(KERN_WARNING PREFIX
|
|
"Unable to turn cooling device [%p] 'off'\n",
|
|
active->devices.handles[j]);
|
|
continue;
|
|
}
|
|
active->flags.enabled = 0;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Cooling device [%p] now 'off'\n",
|
|
active->devices.handles[j]));
|
|
}
|
|
}
|
|
}
|
|
|
|
static void acpi_thermal_check(void *context);
|
|
|
|
static void acpi_thermal_run(unsigned long data)
|
|
{
|
|
struct acpi_thermal *tz = (struct acpi_thermal *)data;
|
|
if (!tz->zombie)
|
|
acpi_os_execute(OSL_GPE_HANDLER, acpi_thermal_check, (void *)data);
|
|
}
|
|
|
|
static void acpi_thermal_active_off(void *data)
|
|
{
|
|
int result = 0;
|
|
struct acpi_thermal *tz = data;
|
|
int i = 0;
|
|
int j = 0;
|
|
struct acpi_thermal_active *active = NULL;
|
|
|
|
if (!tz) {
|
|
printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
|
|
return;
|
|
}
|
|
|
|
result = acpi_thermal_get_temperature(tz);
|
|
if (result)
|
|
return;
|
|
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
|
|
active = &(tz->trips.active[i]);
|
|
if (!active || !active->flags.valid)
|
|
break;
|
|
if (tz->temperature >= active->temperature) {
|
|
/*
|
|
* If the thermal temperature is greater than the
|
|
* active threshod, unnecessary to turn off the
|
|
* the active cooling device.
|
|
*/
|
|
continue;
|
|
}
|
|
/*
|
|
* Below Threshold?
|
|
* ----------------
|
|
* Turn OFF all cooling devices associated with this
|
|
* threshold.
|
|
*/
|
|
for (j = 0; j < active->devices.count; j++)
|
|
result = acpi_bus_set_power(active->devices.handles[j],
|
|
ACPI_STATE_D3);
|
|
}
|
|
}
|
|
|
|
static void acpi_thermal_check(void *data)
|
|
{
|
|
int result = 0;
|
|
struct acpi_thermal *tz = data;
|
|
unsigned long sleep_time = 0;
|
|
unsigned long timeout_jiffies = 0;
|
|
int i = 0;
|
|
struct acpi_thermal_state state;
|
|
|
|
|
|
if (!tz) {
|
|
printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
|
|
return;
|
|
}
|
|
|
|
/* Check if someone else is already running */
|
|
if (!mutex_trylock(&tz->lock))
|
|
return;
|
|
|
|
state = tz->state;
|
|
|
|
result = acpi_thermal_get_temperature(tz);
|
|
if (result)
|
|
goto unlock;
|
|
|
|
if (!tz->tz_enabled)
|
|
goto unlock;
|
|
|
|
memset(&tz->state, 0, sizeof(tz->state));
|
|
|
|
/*
|
|
* Check Trip Points
|
|
* -----------------
|
|
* Compare the current temperature to the trip point values to see
|
|
* if we've entered one of the thermal policy states. Note that
|
|
* this function determines when a state is entered, but the
|
|
* individual policy decides when it is exited (e.g. hysteresis).
|
|
*/
|
|
if (tz->trips.critical.flags.valid)
|
|
state.critical |=
|
|
(tz->temperature >= tz->trips.critical.temperature);
|
|
if (tz->trips.hot.flags.valid)
|
|
state.hot |= (tz->temperature >= tz->trips.hot.temperature);
|
|
if (tz->trips.passive.flags.valid)
|
|
state.passive |=
|
|
(tz->temperature >= tz->trips.passive.temperature);
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
|
|
if (tz->trips.active[i].flags.valid)
|
|
state.active |=
|
|
(tz->temperature >=
|
|
tz->trips.active[i].temperature);
|
|
|
|
/*
|
|
* Invoke Policy
|
|
* -------------
|
|
* Separated from the above check to allow individual policy to
|
|
* determine when to exit a given state.
|
|
*/
|
|
if (state.critical)
|
|
acpi_thermal_critical(tz);
|
|
if (state.hot)
|
|
acpi_thermal_hot(tz);
|
|
if (state.passive)
|
|
acpi_thermal_passive(tz);
|
|
if (state.active)
|
|
acpi_thermal_active(tz);
|
|
|
|
/*
|
|
* Calculate State
|
|
* ---------------
|
|
* Again, separated from the above two to allow independent policy
|
|
* decisions.
|
|
*/
|
|
tz->state.critical = tz->trips.critical.flags.enabled;
|
|
tz->state.hot = tz->trips.hot.flags.enabled;
|
|
tz->state.passive = tz->trips.passive.flags.enabled;
|
|
tz->state.active = 0;
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
|
|
tz->state.active |= tz->trips.active[i].flags.enabled;
|
|
|
|
/*
|
|
* Calculate Sleep Time
|
|
* --------------------
|
|
* If we're in the passive state, use _TSP's value. Otherwise
|
|
* use the default polling frequency (e.g. _TZP). If no polling
|
|
* frequency is specified then we'll wait forever (at least until
|
|
* a thermal event occurs). Note that _TSP and _TZD values are
|
|
* given in 1/10th seconds (we must covert to milliseconds).
|
|
*/
|
|
if (tz->state.passive) {
|
|
sleep_time = tz->trips.passive.tsp * 100;
|
|
timeout_jiffies = jiffies + (HZ * sleep_time) / 1000;
|
|
} else if (tz->polling_frequency > 0) {
|
|
sleep_time = tz->polling_frequency * 100;
|
|
timeout_jiffies = round_jiffies(jiffies + (HZ * sleep_time) / 1000);
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n",
|
|
tz->name, tz->temperature, sleep_time));
|
|
|
|
/*
|
|
* Schedule Next Poll
|
|
* ------------------
|
|
*/
|
|
if (!sleep_time) {
|
|
if (timer_pending(&(tz->timer)))
|
|
del_timer(&(tz->timer));
|
|
} else {
|
|
if (timer_pending(&(tz->timer)))
|
|
mod_timer(&(tz->timer), timeout_jiffies);
|
|
else {
|
|
tz->timer.data = (unsigned long)tz;
|
|
tz->timer.function = acpi_thermal_run;
|
|
tz->timer.expires = timeout_jiffies;
|
|
add_timer(&(tz->timer));
|
|
}
|
|
}
|
|
unlock:
|
|
mutex_unlock(&tz->lock);
|
|
}
|
|
|
|
/* sys I/F for generic thermal sysfs support */
|
|
#define KELVIN_TO_MILLICELSIUS(t) (t * 100 - 273200)
|
|
|
|
static int thermal_get_temp(struct thermal_zone_device *thermal, char *buf)
|
|
{
|
|
struct acpi_thermal *tz = thermal->devdata;
|
|
int result;
|
|
|
|
if (!tz)
|
|
return -EINVAL;
|
|
|
|
result = acpi_thermal_get_temperature(tz);
|
|
if (result)
|
|
return result;
|
|
|
|
return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(tz->temperature));
|
|
}
|
|
|
|
static const char enabled[] = "kernel";
|
|
static const char disabled[] = "user";
|
|
static int thermal_get_mode(struct thermal_zone_device *thermal,
|
|
char *buf)
|
|
{
|
|
struct acpi_thermal *tz = thermal->devdata;
|
|
|
|
if (!tz)
|
|
return -EINVAL;
|
|
|
|
return sprintf(buf, "%s\n", tz->tz_enabled ?
|
|
enabled : disabled);
|
|
}
|
|
|
|
static int thermal_set_mode(struct thermal_zone_device *thermal,
|
|
const char *buf)
|
|
{
|
|
struct acpi_thermal *tz = thermal->devdata;
|
|
int enable;
|
|
|
|
if (!tz)
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* enable/disable thermal management from ACPI thermal driver
|
|
*/
|
|
if (!strncmp(buf, enabled, sizeof enabled - 1))
|
|
enable = 1;
|
|
else if (!strncmp(buf, disabled, sizeof disabled - 1))
|
|
enable = 0;
|
|
else
|
|
return -EINVAL;
|
|
|
|
if (enable != tz->tz_enabled) {
|
|
tz->tz_enabled = enable;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"%s ACPI thermal control\n",
|
|
tz->tz_enabled ? enabled : disabled));
|
|
acpi_thermal_check(tz);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int thermal_get_trip_type(struct thermal_zone_device *thermal,
|
|
int trip, char *buf)
|
|
{
|
|
struct acpi_thermal *tz = thermal->devdata;
|
|
int i;
|
|
|
|
if (!tz || trip < 0)
|
|
return -EINVAL;
|
|
|
|
if (tz->trips.critical.flags.valid) {
|
|
if (!trip)
|
|
return sprintf(buf, "critical\n");
|
|
trip--;
|
|
}
|
|
|
|
if (tz->trips.hot.flags.valid) {
|
|
if (!trip)
|
|
return sprintf(buf, "hot\n");
|
|
trip--;
|
|
}
|
|
|
|
if (tz->trips.passive.flags.valid) {
|
|
if (!trip)
|
|
return sprintf(buf, "passive\n");
|
|
trip--;
|
|
}
|
|
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
|
|
tz->trips.active[i].flags.valid; i++) {
|
|
if (!trip)
|
|
return sprintf(buf, "active%d\n", i);
|
|
trip--;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
|
|
int trip, char *buf)
|
|
{
|
|
struct acpi_thermal *tz = thermal->devdata;
|
|
int i;
|
|
|
|
if (!tz || trip < 0)
|
|
return -EINVAL;
|
|
|
|
if (tz->trips.critical.flags.valid) {
|
|
if (!trip)
|
|
return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(
|
|
tz->trips.critical.temperature));
|
|
trip--;
|
|
}
|
|
|
|
if (tz->trips.hot.flags.valid) {
|
|
if (!trip)
|
|
return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(
|
|
tz->trips.hot.temperature));
|
|
trip--;
|
|
}
|
|
|
|
if (tz->trips.passive.flags.valid) {
|
|
if (!trip)
|
|
return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(
|
|
tz->trips.passive.temperature));
|
|
trip--;
|
|
}
|
|
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
|
|
tz->trips.active[i].flags.valid; i++) {
|
|
if (!trip)
|
|
return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(
|
|
tz->trips.active[i].temperature));
|
|
trip--;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
|
|
unsigned long *temperature) {
|
|
struct acpi_thermal *tz = thermal->devdata;
|
|
|
|
if (tz->trips.critical.flags.valid) {
|
|
*temperature = KELVIN_TO_MILLICELSIUS(
|
|
tz->trips.critical.temperature);
|
|
return 0;
|
|
} else
|
|
return -EINVAL;
|
|
}
|
|
|
|
typedef int (*cb)(struct thermal_zone_device *, int,
|
|
struct thermal_cooling_device *);
|
|
static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
|
|
struct thermal_cooling_device *cdev,
|
|
cb action)
|
|
{
|
|
struct acpi_device *device = cdev->devdata;
|
|
struct acpi_thermal *tz = thermal->devdata;
|
|
struct acpi_device *dev;
|
|
acpi_status status;
|
|
acpi_handle handle;
|
|
int i;
|
|
int j;
|
|
int trip = -1;
|
|
int result = 0;
|
|
|
|
if (tz->trips.critical.flags.valid)
|
|
trip++;
|
|
|
|
if (tz->trips.hot.flags.valid)
|
|
trip++;
|
|
|
|
if (tz->trips.passive.flags.valid) {
|
|
trip++;
|
|
for (i = 0; i < tz->trips.passive.devices.count;
|
|
i++) {
|
|
handle = tz->trips.passive.devices.handles[i];
|
|
status = acpi_bus_get_device(handle, &dev);
|
|
if (ACPI_SUCCESS(status) && (dev == device)) {
|
|
result = action(thermal, trip, cdev);
|
|
if (result)
|
|
goto failed;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
|
|
if (!tz->trips.active[i].flags.valid)
|
|
break;
|
|
trip++;
|
|
for (j = 0;
|
|
j < tz->trips.active[i].devices.count;
|
|
j++) {
|
|
handle = tz->trips.active[i].devices.handles[j];
|
|
status = acpi_bus_get_device(handle, &dev);
|
|
if (ACPI_SUCCESS(status) && (dev == device)) {
|
|
result = action(thermal, trip, cdev);
|
|
if (result)
|
|
goto failed;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < tz->devices.count; i++) {
|
|
handle = tz->devices.handles[i];
|
|
status = acpi_bus_get_device(handle, &dev);
|
|
if (ACPI_SUCCESS(status) && (dev == device)) {
|
|
result = action(thermal, -1, cdev);
|
|
if (result)
|
|
goto failed;
|
|
}
|
|
}
|
|
|
|
failed:
|
|
return result;
|
|
}
|
|
|
|
static int
|
|
acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal,
|
|
struct thermal_cooling_device *cdev)
|
|
{
|
|
return acpi_thermal_cooling_device_cb(thermal, cdev,
|
|
thermal_zone_bind_cooling_device);
|
|
}
|
|
|
|
static int
|
|
acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
|
|
struct thermal_cooling_device *cdev)
|
|
{
|
|
return acpi_thermal_cooling_device_cb(thermal, cdev,
|
|
thermal_zone_unbind_cooling_device);
|
|
}
|
|
|
|
static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
|
|
.bind = acpi_thermal_bind_cooling_device,
|
|
.unbind = acpi_thermal_unbind_cooling_device,
|
|
.get_temp = thermal_get_temp,
|
|
.get_mode = thermal_get_mode,
|
|
.set_mode = thermal_set_mode,
|
|
.get_trip_type = thermal_get_trip_type,
|
|
.get_trip_temp = thermal_get_trip_temp,
|
|
.get_crit_temp = thermal_get_crit_temp,
|
|
};
|
|
|
|
static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
|
|
{
|
|
int trips = 0;
|
|
int result;
|
|
acpi_status status;
|
|
int i;
|
|
|
|
if (tz->trips.critical.flags.valid)
|
|
trips++;
|
|
|
|
if (tz->trips.hot.flags.valid)
|
|
trips++;
|
|
|
|
if (tz->trips.passive.flags.valid)
|
|
trips++;
|
|
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
|
|
tz->trips.active[i].flags.valid; i++, trips++);
|
|
tz->thermal_zone = thermal_zone_device_register("acpitz",
|
|
trips, tz, &acpi_thermal_zone_ops);
|
|
if (IS_ERR(tz->thermal_zone))
|
|
return -ENODEV;
|
|
|
|
result = sysfs_create_link(&tz->device->dev.kobj,
|
|
&tz->thermal_zone->device.kobj, "thermal_zone");
|
|
if (result)
|
|
return result;
|
|
|
|
result = sysfs_create_link(&tz->thermal_zone->device.kobj,
|
|
&tz->device->dev.kobj, "device");
|
|
if (result)
|
|
return result;
|
|
|
|
status = acpi_attach_data(tz->device->handle,
|
|
acpi_bus_private_data_handler,
|
|
tz->thermal_zone);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Error attaching device data\n"));
|
|
return -ENODEV;
|
|
}
|
|
|
|
tz->tz_enabled = 1;
|
|
|
|
dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
|
|
tz->thermal_zone->id);
|
|
return 0;
|
|
}
|
|
|
|
static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
|
|
{
|
|
sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
|
|
sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
|
|
thermal_zone_device_unregister(tz->thermal_zone);
|
|
tz->thermal_zone = NULL;
|
|
acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler);
|
|
}
|
|
|
|
|
|
/* --------------------------------------------------------------------------
|
|
FS Interface (/proc)
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static struct proc_dir_entry *acpi_thermal_dir;
|
|
|
|
static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset)
|
|
{
|
|
struct acpi_thermal *tz = seq->private;
|
|
|
|
|
|
if (!tz)
|
|
goto end;
|
|
|
|
seq_puts(seq, "state: ");
|
|
|
|
if (!tz->state.critical && !tz->state.hot && !tz->state.passive
|
|
&& !tz->state.active)
|
|
seq_puts(seq, "ok\n");
|
|
else {
|
|
if (tz->state.critical)
|
|
seq_puts(seq, "critical ");
|
|
if (tz->state.hot)
|
|
seq_puts(seq, "hot ");
|
|
if (tz->state.passive)
|
|
seq_puts(seq, "passive ");
|
|
if (tz->state.active)
|
|
seq_printf(seq, "active[%d]", tz->state.active_index);
|
|
seq_puts(seq, "\n");
|
|
}
|
|
|
|
end:
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data);
|
|
}
|
|
|
|
static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset)
|
|
{
|
|
int result = 0;
|
|
struct acpi_thermal *tz = seq->private;
|
|
|
|
|
|
if (!tz)
|
|
goto end;
|
|
|
|
result = acpi_thermal_get_temperature(tz);
|
|
if (result)
|
|
goto end;
|
|
|
|
seq_printf(seq, "temperature: %ld C\n",
|
|
KELVIN_TO_CELSIUS(tz->temperature));
|
|
|
|
end:
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data);
|
|
}
|
|
|
|
static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset)
|
|
{
|
|
struct acpi_thermal *tz = seq->private;
|
|
struct acpi_device *device;
|
|
acpi_status status;
|
|
|
|
int i = 0;
|
|
int j = 0;
|
|
|
|
|
|
if (!tz)
|
|
goto end;
|
|
|
|
if (tz->trips.critical.flags.valid)
|
|
seq_printf(seq, "critical (S5): %ld C%s",
|
|
KELVIN_TO_CELSIUS(tz->trips.critical.temperature),
|
|
nocrt ? " <disabled>\n" : "\n");
|
|
|
|
if (tz->trips.hot.flags.valid)
|
|
seq_printf(seq, "hot (S4): %ld C%s",
|
|
KELVIN_TO_CELSIUS(tz->trips.hot.temperature),
|
|
nocrt ? " <disabled>\n" : "\n");
|
|
|
|
if (tz->trips.passive.flags.valid) {
|
|
seq_printf(seq,
|
|
"passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=",
|
|
KELVIN_TO_CELSIUS(tz->trips.passive.temperature),
|
|
tz->trips.passive.tc1, tz->trips.passive.tc2,
|
|
tz->trips.passive.tsp);
|
|
for (j = 0; j < tz->trips.passive.devices.count; j++) {
|
|
status = acpi_bus_get_device(tz->trips.passive.devices.
|
|
handles[j], &device);
|
|
seq_printf(seq, "%4.4s ", status ? "" :
|
|
acpi_device_bid(device));
|
|
}
|
|
seq_puts(seq, "\n");
|
|
}
|
|
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
|
|
if (!(tz->trips.active[i].flags.valid))
|
|
break;
|
|
seq_printf(seq, "active[%d]: %ld C: devices=",
|
|
i,
|
|
KELVIN_TO_CELSIUS(tz->trips.active[i].temperature));
|
|
for (j = 0; j < tz->trips.active[i].devices.count; j++){
|
|
status = acpi_bus_get_device(tz->trips.active[i].
|
|
devices.handles[j],
|
|
&device);
|
|
seq_printf(seq, "%4.4s ", status ? "" :
|
|
acpi_device_bid(device));
|
|
}
|
|
seq_puts(seq, "\n");
|
|
}
|
|
|
|
end:
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data);
|
|
}
|
|
|
|
static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset)
|
|
{
|
|
struct acpi_thermal *tz = seq->private;
|
|
|
|
|
|
if (!tz)
|
|
goto end;
|
|
|
|
if (!tz->flags.cooling_mode)
|
|
seq_puts(seq, "<setting not supported>\n");
|
|
else
|
|
seq_puts(seq, "0 - Active; 1 - Passive\n");
|
|
|
|
end:
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, acpi_thermal_cooling_seq_show,
|
|
PDE(inode)->data);
|
|
}
|
|
|
|
static ssize_t
|
|
acpi_thermal_write_cooling_mode(struct file *file,
|
|
const char __user * buffer,
|
|
size_t count, loff_t * ppos)
|
|
{
|
|
struct seq_file *m = file->private_data;
|
|
struct acpi_thermal *tz = m->private;
|
|
int result = 0;
|
|
char mode_string[12] = { '\0' };
|
|
|
|
|
|
if (!tz || (count > sizeof(mode_string) - 1))
|
|
return -EINVAL;
|
|
|
|
if (!tz->flags.cooling_mode)
|
|
return -ENODEV;
|
|
|
|
if (copy_from_user(mode_string, buffer, count))
|
|
return -EFAULT;
|
|
|
|
mode_string[count] = '\0';
|
|
|
|
result = acpi_thermal_set_cooling_mode(tz,
|
|
simple_strtoul(mode_string, NULL,
|
|
0));
|
|
if (result)
|
|
return result;
|
|
|
|
acpi_thermal_check(tz);
|
|
|
|
return count;
|
|
}
|
|
|
|
static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset)
|
|
{
|
|
struct acpi_thermal *tz = seq->private;
|
|
|
|
|
|
if (!tz)
|
|
goto end;
|
|
|
|
if (!tz->polling_frequency) {
|
|
seq_puts(seq, "<polling disabled>\n");
|
|
goto end;
|
|
}
|
|
|
|
seq_printf(seq, "polling frequency: %lu seconds\n",
|
|
(tz->polling_frequency / 10));
|
|
|
|
end:
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, acpi_thermal_polling_seq_show,
|
|
PDE(inode)->data);
|
|
}
|
|
|
|
static ssize_t
|
|
acpi_thermal_write_polling(struct file *file,
|
|
const char __user * buffer,
|
|
size_t count, loff_t * ppos)
|
|
{
|
|
struct seq_file *m = file->private_data;
|
|
struct acpi_thermal *tz = m->private;
|
|
int result = 0;
|
|
char polling_string[12] = { '\0' };
|
|
int seconds = 0;
|
|
|
|
|
|
if (!tz || (count > sizeof(polling_string) - 1))
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(polling_string, buffer, count))
|
|
return -EFAULT;
|
|
|
|
polling_string[count] = '\0';
|
|
|
|
seconds = simple_strtoul(polling_string, NULL, 0);
|
|
|
|
result = acpi_thermal_set_polling(tz, seconds);
|
|
if (result)
|
|
return result;
|
|
|
|
acpi_thermal_check(tz);
|
|
|
|
return count;
|
|
}
|
|
|
|
static int acpi_thermal_add_fs(struct acpi_device *device)
|
|
{
|
|
struct proc_dir_entry *entry = NULL;
|
|
|
|
|
|
if (!acpi_device_dir(device)) {
|
|
acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
|
|
acpi_thermal_dir);
|
|
if (!acpi_device_dir(device))
|
|
return -ENODEV;
|
|
acpi_device_dir(device)->owner = THIS_MODULE;
|
|
}
|
|
|
|
/* 'state' [R] */
|
|
entry = proc_create_data(ACPI_THERMAL_FILE_STATE,
|
|
S_IRUGO, acpi_device_dir(device),
|
|
&acpi_thermal_state_fops,
|
|
acpi_driver_data(device));
|
|
if (!entry)
|
|
return -ENODEV;
|
|
|
|
/* 'temperature' [R] */
|
|
entry = proc_create_data(ACPI_THERMAL_FILE_TEMPERATURE,
|
|
S_IRUGO, acpi_device_dir(device),
|
|
&acpi_thermal_temp_fops,
|
|
acpi_driver_data(device));
|
|
if (!entry)
|
|
return -ENODEV;
|
|
|
|
/* 'trip_points' [R] */
|
|
entry = proc_create_data(ACPI_THERMAL_FILE_TRIP_POINTS,
|
|
S_IRUGO,
|
|
acpi_device_dir(device),
|
|
&acpi_thermal_trip_fops,
|
|
acpi_driver_data(device));
|
|
if (!entry)
|
|
return -ENODEV;
|
|
|
|
/* 'cooling_mode' [R/W] */
|
|
entry = proc_create_data(ACPI_THERMAL_FILE_COOLING_MODE,
|
|
S_IFREG | S_IRUGO | S_IWUSR,
|
|
acpi_device_dir(device),
|
|
&acpi_thermal_cooling_fops,
|
|
acpi_driver_data(device));
|
|
if (!entry)
|
|
return -ENODEV;
|
|
|
|
/* 'polling_frequency' [R/W] */
|
|
entry = proc_create_data(ACPI_THERMAL_FILE_POLLING_FREQ,
|
|
S_IFREG | S_IRUGO | S_IWUSR,
|
|
acpi_device_dir(device),
|
|
&acpi_thermal_polling_fops,
|
|
acpi_driver_data(device));
|
|
if (!entry)
|
|
return -ENODEV;
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_remove_fs(struct acpi_device *device)
|
|
{
|
|
|
|
if (acpi_device_dir(device)) {
|
|
remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ,
|
|
acpi_device_dir(device));
|
|
remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE,
|
|
acpi_device_dir(device));
|
|
remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS,
|
|
acpi_device_dir(device));
|
|
remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE,
|
|
acpi_device_dir(device));
|
|
remove_proc_entry(ACPI_THERMAL_FILE_STATE,
|
|
acpi_device_dir(device));
|
|
remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir);
|
|
acpi_device_dir(device) = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Driver Interface
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data)
|
|
{
|
|
struct acpi_thermal *tz = data;
|
|
struct acpi_device *device = NULL;
|
|
|
|
|
|
if (!tz)
|
|
return;
|
|
|
|
device = tz->device;
|
|
|
|
switch (event) {
|
|
case ACPI_THERMAL_NOTIFY_TEMPERATURE:
|
|
acpi_thermal_check(tz);
|
|
break;
|
|
case ACPI_THERMAL_NOTIFY_THRESHOLDS:
|
|
acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
|
|
acpi_thermal_check(tz);
|
|
acpi_bus_generate_proc_event(device, event, 0);
|
|
acpi_bus_generate_netlink_event(device->pnp.device_class,
|
|
device->dev.bus_id, event, 0);
|
|
break;
|
|
case ACPI_THERMAL_NOTIFY_DEVICES:
|
|
acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
|
|
acpi_thermal_check(tz);
|
|
acpi_bus_generate_proc_event(device, event, 0);
|
|
acpi_bus_generate_netlink_event(device->pnp.device_class,
|
|
device->dev.bus_id, event, 0);
|
|
break;
|
|
default:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Unsupported event [0x%x]\n", event));
|
|
break;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
static int acpi_thermal_get_info(struct acpi_thermal *tz)
|
|
{
|
|
int result = 0;
|
|
|
|
|
|
if (!tz)
|
|
return -EINVAL;
|
|
|
|
/* Get temperature [_TMP] (required) */
|
|
result = acpi_thermal_get_temperature(tz);
|
|
if (result)
|
|
return result;
|
|
|
|
/* Get trip points [_CRT, _PSV, etc.] (required) */
|
|
result = acpi_thermal_get_trip_points(tz);
|
|
if (result)
|
|
return result;
|
|
|
|
/* Set the cooling mode [_SCP] to active cooling (default) */
|
|
result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE);
|
|
if (!result)
|
|
tz->flags.cooling_mode = 1;
|
|
|
|
/* Get default polling frequency [_TZP] (optional) */
|
|
if (tzp)
|
|
tz->polling_frequency = tzp;
|
|
else
|
|
acpi_thermal_get_polling_frequency(tz);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_add(struct acpi_device *device)
|
|
{
|
|
int result = 0;
|
|
acpi_status status = AE_OK;
|
|
struct acpi_thermal *tz = NULL;
|
|
|
|
|
|
if (!device)
|
|
return -EINVAL;
|
|
|
|
tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
|
|
if (!tz)
|
|
return -ENOMEM;
|
|
|
|
tz->device = device;
|
|
strcpy(tz->name, device->pnp.bus_id);
|
|
strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
|
|
strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
|
|
device->driver_data = tz;
|
|
mutex_init(&tz->lock);
|
|
|
|
|
|
result = acpi_thermal_get_info(tz);
|
|
if (result)
|
|
goto free_memory;
|
|
|
|
result = acpi_thermal_register_thermal_zone(tz);
|
|
if (result)
|
|
goto free_memory;
|
|
|
|
result = acpi_thermal_add_fs(device);
|
|
if (result)
|
|
goto unregister_thermal_zone;
|
|
|
|
init_timer(&tz->timer);
|
|
|
|
acpi_thermal_active_off(tz);
|
|
|
|
acpi_thermal_check(tz);
|
|
|
|
status = acpi_install_notify_handler(device->handle,
|
|
ACPI_DEVICE_NOTIFY,
|
|
acpi_thermal_notify, tz);
|
|
if (ACPI_FAILURE(status)) {
|
|
result = -ENODEV;
|
|
goto remove_fs;
|
|
}
|
|
|
|
printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
|
|
acpi_device_name(device), acpi_device_bid(device),
|
|
KELVIN_TO_CELSIUS(tz->temperature));
|
|
goto end;
|
|
|
|
remove_fs:
|
|
acpi_thermal_remove_fs(device);
|
|
unregister_thermal_zone:
|
|
thermal_zone_device_unregister(tz->thermal_zone);
|
|
free_memory:
|
|
kfree(tz);
|
|
end:
|
|
return result;
|
|
}
|
|
|
|
static int acpi_thermal_remove(struct acpi_device *device, int type)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
struct acpi_thermal *tz = NULL;
|
|
|
|
|
|
if (!device || !acpi_driver_data(device))
|
|
return -EINVAL;
|
|
|
|
tz = acpi_driver_data(device);
|
|
|
|
/* avoid timer adding new defer task */
|
|
tz->zombie = 1;
|
|
/* wait for running timer (on other CPUs) finish */
|
|
del_timer_sync(&(tz->timer));
|
|
/* synchronize deferred task */
|
|
acpi_os_wait_events_complete(NULL);
|
|
/* deferred task may reinsert timer */
|
|
del_timer_sync(&(tz->timer));
|
|
|
|
status = acpi_remove_notify_handler(device->handle,
|
|
ACPI_DEVICE_NOTIFY,
|
|
acpi_thermal_notify);
|
|
|
|
/* Terminate policy */
|
|
if (tz->trips.passive.flags.valid && tz->trips.passive.flags.enabled) {
|
|
tz->trips.passive.flags.enabled = 0;
|
|
acpi_thermal_passive(tz);
|
|
}
|
|
if (tz->trips.active[0].flags.valid
|
|
&& tz->trips.active[0].flags.enabled) {
|
|
tz->trips.active[0].flags.enabled = 0;
|
|
acpi_thermal_active(tz);
|
|
}
|
|
|
|
acpi_thermal_remove_fs(device);
|
|
acpi_thermal_unregister_thermal_zone(tz);
|
|
mutex_destroy(&tz->lock);
|
|
kfree(tz);
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_resume(struct acpi_device *device)
|
|
{
|
|
struct acpi_thermal *tz = NULL;
|
|
int i, j, power_state, result;
|
|
|
|
|
|
if (!device || !acpi_driver_data(device))
|
|
return -EINVAL;
|
|
|
|
tz = acpi_driver_data(device);
|
|
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
|
|
if (!(&tz->trips.active[i]))
|
|
break;
|
|
if (!tz->trips.active[i].flags.valid)
|
|
break;
|
|
tz->trips.active[i].flags.enabled = 1;
|
|
for (j = 0; j < tz->trips.active[i].devices.count; j++) {
|
|
result = acpi_bus_get_power(tz->trips.active[i].devices.
|
|
handles[j], &power_state);
|
|
if (result || (power_state != ACPI_STATE_D0)) {
|
|
tz->trips.active[i].flags.enabled = 0;
|
|
break;
|
|
}
|
|
}
|
|
tz->state.active |= tz->trips.active[i].flags.enabled;
|
|
}
|
|
|
|
acpi_thermal_check(tz);
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
static int thermal_act(const struct dmi_system_id *d) {
|
|
|
|
if (act == 0) {
|
|
printk(KERN_NOTICE "ACPI: %s detected: "
|
|
"disabling all active thermal trip points\n", d->ident);
|
|
act = -1;
|
|
}
|
|
return 0;
|
|
}
|
|
static int thermal_nocrt(const struct dmi_system_id *d) {
|
|
|
|
printk(KERN_NOTICE "ACPI: %s detected: "
|
|
"disabling all critical thermal trip point actions.\n", d->ident);
|
|
nocrt = 1;
|
|
return 0;
|
|
}
|
|
static int thermal_tzp(const struct dmi_system_id *d) {
|
|
|
|
if (tzp == 0) {
|
|
printk(KERN_NOTICE "ACPI: %s detected: "
|
|
"enabling thermal zone polling\n", d->ident);
|
|
tzp = 300; /* 300 dS = 30 Seconds */
|
|
}
|
|
return 0;
|
|
}
|
|
static int thermal_psv(const struct dmi_system_id *d) {
|
|
|
|
if (psv == 0) {
|
|
printk(KERN_NOTICE "ACPI: %s detected: "
|
|
"disabling all passive thermal trip points\n", d->ident);
|
|
psv = -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct dmi_system_id thermal_dmi_table[] __initdata = {
|
|
/*
|
|
* Award BIOS on this AOpen makes thermal control almost worthless.
|
|
* http://bugzilla.kernel.org/show_bug.cgi?id=8842
|
|
*/
|
|
{
|
|
.callback = thermal_act,
|
|
.ident = "AOpen i915GMm-HFS",
|
|
.matches = {
|
|
DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
|
|
DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
|
|
},
|
|
},
|
|
{
|
|
.callback = thermal_psv,
|
|
.ident = "AOpen i915GMm-HFS",
|
|
.matches = {
|
|
DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
|
|
DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
|
|
},
|
|
},
|
|
{
|
|
.callback = thermal_tzp,
|
|
.ident = "AOpen i915GMm-HFS",
|
|
.matches = {
|
|
DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
|
|
DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
|
|
},
|
|
},
|
|
{
|
|
.callback = thermal_nocrt,
|
|
.ident = "Gigabyte GA-7ZX",
|
|
.matches = {
|
|
DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
|
|
DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
|
|
},
|
|
},
|
|
{}
|
|
};
|
|
|
|
static int __init acpi_thermal_init(void)
|
|
{
|
|
int result = 0;
|
|
|
|
dmi_check_system(thermal_dmi_table);
|
|
|
|
if (off) {
|
|
printk(KERN_NOTICE "ACPI: thermal control disabled\n");
|
|
return -ENODEV;
|
|
}
|
|
acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir);
|
|
if (!acpi_thermal_dir)
|
|
return -ENODEV;
|
|
acpi_thermal_dir->owner = THIS_MODULE;
|
|
|
|
result = acpi_bus_register_driver(&acpi_thermal_driver);
|
|
if (result < 0) {
|
|
remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir);
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit acpi_thermal_exit(void)
|
|
{
|
|
|
|
acpi_bus_unregister_driver(&acpi_thermal_driver);
|
|
|
|
remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir);
|
|
|
|
return;
|
|
}
|
|
|
|
module_init(acpi_thermal_init);
|
|
module_exit(acpi_thermal_exit);
|