Subject: [PATCH] [acpi driver model] Move thermal driver Signed-off-by: Patrick Mochel --- drivers/acpi/Makefile | 1 drivers/acpi/drivers/legacy/Makefile | 1 drivers/acpi/drivers/legacy/thermal.c | 1451 +++++++++++++++++++++++++++++++++ drivers/acpi/thermal.c | 1451 --------------------------------- 4 files changed, 1452 insertions(+), 1452 deletions(-) create mode 100644 drivers/acpi/drivers/legacy/thermal.c delete mode 100644 drivers/acpi/thermal.c applies-to: af323a9183b3bcb15a3c4bc0233a5133dad3ee26 db31116897bb928d33ddff0160db0ec682316c4a diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index 261db1f..011466e 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -35,7 +35,6 @@ obj-y += bus.o glue.o obj-y += drivers/ obj-$(CONFIG_ACPI_VIDEO) += video.o obj-y += pci_root.o pci_link.o pci_irq.o pci_bind.o -obj-$(CONFIG_ACPI_THERMAL) += thermal.o obj-$(CONFIG_ACPI_SYSTEM) += system.o event.o obj-$(CONFIG_ACPI_DEBUG) += debug.o obj-$(CONFIG_ACPI_ASUS) += asus_acpi.o diff --git a/drivers/acpi/drivers/legacy/Makefile b/drivers/acpi/drivers/legacy/Makefile index d9c4280..a4d82af 100644 --- a/drivers/acpi/drivers/legacy/Makefile +++ b/drivers/acpi/drivers/legacy/Makefile @@ -17,3 +17,4 @@ processor-objs += processor_perflib.o endif obj-$(CONFIG_ACPI_PROCESSOR) += processor.o +obj-$(CONFIG_ACPI_THERMAL) += thermal.o diff --git a/drivers/acpi/drivers/legacy/thermal.c b/drivers/acpi/drivers/legacy/thermal.c new file mode 100644 index 0000000..19f3ea4 --- /dev/null +++ b/drivers/acpi/drivers/legacy/thermal.c @@ -0,0 +1,1451 @@ +/* + * acpi_thermal.c - ACPI Thermal Zone Driver ($Revision: 41 $) + * + * Copyright (C) 2001, 2002 Andy Grover + * Copyright (C) 2001, 2002 Paul Diefenbaugh + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This driver fully implements the ACPI thermal policy as described in the + * ACPI 2.0 Specification. + * + * TBD: 1. Implement passive cooling hysteresis. + * 2. Enhance passive cooling (CPU) states/limit interface to support + * concepts of 'multiple limiters', upper/lower limits, etc. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define ACPI_THERMAL_COMPONENT 0x04000000 +#define ACPI_THERMAL_CLASS "thermal_zone" +#define ACPI_THERMAL_DRIVER_NAME "ACPI Thermal Zone Driver" +#define ACPI_THERMAL_DEVICE_NAME "Thermal Zone" +#define ACPI_THERMAL_FILE_STATE "state" +#define ACPI_THERMAL_FILE_TEMPERATURE "temperature" +#define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points" +#define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode" +#define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency" +#define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80 +#define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81 +#define ACPI_THERMAL_NOTIFY_DEVICES 0x82 +#define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0 +#define ACPI_THERMAL_NOTIFY_HOT 0xF1 +#define ACPI_THERMAL_MODE_ACTIVE 0x00 +#define ACPI_THERMAL_MODE_PASSIVE 0x01 +#define ACPI_THERMAL_MODE_CRITICAL 0xff +#define ACPI_THERMAL_PATH_POWEROFF "/sbin/poweroff" + +#define ACPI_THERMAL_MAX_ACTIVE 10 +#define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 + +#define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732>=0) ? ((long)t-2732+5)/10 : ((long)t-2732-5)/10) +#define CELSIUS_TO_KELVIN(t) ((t+273)*10) + +#define _COMPONENT ACPI_THERMAL_COMPONENT +ACPI_MODULE_NAME("acpi_thermal") + +MODULE_AUTHOR("Paul Diefenbaugh"); +MODULE_DESCRIPTION(ACPI_THERMAL_DRIVER_NAME); +MODULE_LICENSE("GPL"); + +static int tzp; +module_param(tzp, int, 0); +MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n"); + +static int acpi_thermal_add(struct acpi_device *device); +static int acpi_thermal_remove(struct acpi_device *device, int type); +static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file); +static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file); +static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file); +static ssize_t acpi_thermal_write_trip_points(struct file *, + const char __user *, size_t, + loff_t *); +static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file); +static ssize_t acpi_thermal_write_cooling_mode(struct file *, + const char __user *, size_t, + loff_t *); +static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file); +static ssize_t acpi_thermal_write_polling(struct file *, const char __user *, + size_t, loff_t *); + +static struct acpi_driver acpi_thermal_driver = { + .name = ACPI_THERMAL_DRIVER_NAME, + .class = ACPI_THERMAL_CLASS, + .ids = ACPI_THERMAL_HID, + .ops = { + .add = acpi_thermal_add, + .remove = acpi_thermal_remove, + }, +}; + +struct acpi_thermal_state { + u8 critical:1; + u8 hot:1; + u8 passive:1; + u8 active:1; + u8 reserved:4; + int active_index; +}; + +struct acpi_thermal_state_flags { + u8 valid:1; + u8 enabled:1; + u8 reserved:6; +}; + +struct acpi_thermal_critical { + struct acpi_thermal_state_flags flags; + unsigned long temperature; +}; + +struct acpi_thermal_hot { + struct acpi_thermal_state_flags flags; + unsigned long temperature; +}; + +struct acpi_thermal_passive { + struct acpi_thermal_state_flags flags; + unsigned long temperature; + unsigned long tc1; + unsigned long tc2; + unsigned long tsp; + struct acpi_handle_list devices; +}; + +struct acpi_thermal_active { + struct acpi_thermal_state_flags flags; + unsigned long temperature; + struct acpi_handle_list devices; +}; + +struct acpi_thermal_trips { + struct acpi_thermal_critical critical; + struct acpi_thermal_hot hot; + struct acpi_thermal_passive passive; + struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; +}; + +struct acpi_thermal_flags { + u8 cooling_mode:1; /* _SCP */ + u8 devices:1; /* _TZD */ + u8 reserved:6; +}; + +struct acpi_thermal { + acpi_handle handle; + acpi_bus_id name; + unsigned long temperature; + unsigned long last_temperature; + unsigned long polling_frequency; + u8 cooling_mode; + volatile u8 zombie; + struct acpi_thermal_flags flags; + struct acpi_thermal_state state; + struct acpi_thermal_trips trips; + struct acpi_handle_list devices; + struct timer_list timer; +}; + +static struct file_operations acpi_thermal_state_fops = { + .open = acpi_thermal_state_open_fs, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static struct file_operations acpi_thermal_temp_fops = { + .open = acpi_thermal_temp_open_fs, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static struct file_operations acpi_thermal_trip_fops = { + .open = acpi_thermal_trip_open_fs, + .read = seq_read, + .write = acpi_thermal_write_trip_points, + .llseek = seq_lseek, + .release = single_release, +}; + +static struct file_operations acpi_thermal_cooling_fops = { + .open = acpi_thermal_cooling_open_fs, + .read = seq_read, + .write = acpi_thermal_write_cooling_mode, + .llseek = seq_lseek, + .release = single_release, +}; + +static struct file_operations acpi_thermal_polling_fops = { + .open = acpi_thermal_polling_open_fs, + .read = seq_read, + .write = acpi_thermal_write_polling, + .llseek = seq_lseek, + .release = single_release, +}; + +/* -------------------------------------------------------------------------- + Thermal Zone Management + -------------------------------------------------------------------------- */ + +static int acpi_thermal_get_temperature(struct acpi_thermal *tz) +{ + acpi_status status = AE_OK; + + ACPI_FUNCTION_TRACE("acpi_thermal_get_temperature"); + + if (!tz) + return_VALUE(-EINVAL); + + tz->last_temperature = tz->temperature; + + status = + acpi_evaluate_integer(tz->handle, "_TMP", NULL, &tz->temperature); + if (ACPI_FAILURE(status)) + return_VALUE(-ENODEV); + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", + tz->temperature)); + + return_VALUE(0); +} + +static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) +{ + acpi_status status = AE_OK; + + ACPI_FUNCTION_TRACE("acpi_thermal_get_polling_frequency"); + + if (!tz) + return_VALUE(-EINVAL); + + status = + acpi_evaluate_integer(tz->handle, "_TZP", NULL, + &tz->polling_frequency); + if (ACPI_FAILURE(status)) + return_VALUE(-ENODEV); + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", + tz->polling_frequency)); + + return_VALUE(0); +} + +static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds) +{ + ACPI_FUNCTION_TRACE("acpi_thermal_set_polling"); + + if (!tz) + return_VALUE(-EINVAL); + + tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */ + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Polling frequency set to %lu seconds\n", + tz->polling_frequency)); + + return_VALUE(0); +} + +static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) +{ + acpi_status status = AE_OK; + union acpi_object arg0 = { ACPI_TYPE_INTEGER }; + struct acpi_object_list arg_list = { 1, &arg0 }; + acpi_handle handle = NULL; + + ACPI_FUNCTION_TRACE("acpi_thermal_set_cooling_mode"); + + if (!tz) + return_VALUE(-EINVAL); + + status = acpi_get_handle(tz->handle, "_SCP", &handle); + if (ACPI_FAILURE(status)) { + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); + return_VALUE(-ENODEV); + } + + arg0.integer.value = mode; + + status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); + if (ACPI_FAILURE(status)) + return_VALUE(-ENODEV); + + tz->cooling_mode = mode; + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Cooling mode [%s]\n", + mode ? "passive" : "active")); + + return_VALUE(0); +} + +static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) +{ + acpi_status status = AE_OK; + int i = 0; + + ACPI_FUNCTION_TRACE("acpi_thermal_get_trip_points"); + + if (!tz) + return_VALUE(-EINVAL); + + /* Critical Shutdown (required) */ + + status = acpi_evaluate_integer(tz->handle, "_CRT", NULL, + &tz->trips.critical.temperature); + if (ACPI_FAILURE(status)) { + tz->trips.critical.flags.valid = 0; + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "No critical threshold\n")); + return_VALUE(-ENODEV); + } else { + tz->trips.critical.flags.valid = 1; + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Found critical threshold [%lu]\n", + tz->trips.critical.temperature)); + } + + /* Critical Sleep (optional) */ + + status = + acpi_evaluate_integer(tz->handle, "_HOT", NULL, + &tz->trips.hot.temperature); + if (ACPI_FAILURE(status)) { + tz->trips.hot.flags.valid = 0; + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No hot threshold\n")); + } else { + tz->trips.hot.flags.valid = 1; + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found hot threshold [%lu]\n", + tz->trips.hot.temperature)); + } + + /* Passive: Processors (optional) */ + + status = + acpi_evaluate_integer(tz->handle, "_PSV", NULL, + &tz->trips.passive.temperature); + if (ACPI_FAILURE(status)) { + tz->trips.passive.flags.valid = 0; + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No passive threshold\n")); + } else { + tz->trips.passive.flags.valid = 1; + + status = + acpi_evaluate_integer(tz->handle, "_TC1", NULL, + &tz->trips.passive.tc1); + if (ACPI_FAILURE(status)) + tz->trips.passive.flags.valid = 0; + + status = + acpi_evaluate_integer(tz->handle, "_TC2", NULL, + &tz->trips.passive.tc2); + if (ACPI_FAILURE(status)) + tz->trips.passive.flags.valid = 0; + + status = + acpi_evaluate_integer(tz->handle, "_TSP", NULL, + &tz->trips.passive.tsp); + if (ACPI_FAILURE(status)) + tz->trips.passive.flags.valid = 0; + + status = + acpi_evaluate_reference(tz->handle, "_PSL", NULL, + &tz->trips.passive.devices); + if (ACPI_FAILURE(status)) + tz->trips.passive.flags.valid = 0; + + if (!tz->trips.passive.flags.valid) + ACPI_DEBUG_PRINT((ACPI_DB_WARN, + "Invalid passive threshold\n")); + else + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Found passive threshold [%lu]\n", + tz->trips.passive.temperature)); + } + + /* Active: Fans, etc. (optional) */ + + for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { + + char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; + + status = + acpi_evaluate_integer(tz->handle, name, NULL, + &tz->trips.active[i].temperature); + if (ACPI_FAILURE(status)) + break; + + name[2] = 'L'; + status = + acpi_evaluate_reference(tz->handle, name, NULL, + &tz->trips.active[i].devices); + if (ACPI_SUCCESS(status)) { + tz->trips.active[i].flags.valid = 1; + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Found active threshold [%d]:[%lu]\n", + i, tz->trips.active[i].temperature)); + } else + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Invalid active threshold [%d]\n", + i)); + } + + return_VALUE(0); +} + +static int acpi_thermal_get_devices(struct acpi_thermal *tz) +{ + acpi_status status = AE_OK; + + ACPI_FUNCTION_TRACE("acpi_thermal_get_devices"); + + if (!tz) + return_VALUE(-EINVAL); + + status = + acpi_evaluate_reference(tz->handle, "_TZD", NULL, &tz->devices); + if (ACPI_FAILURE(status)) + return_VALUE(-ENODEV); + + return_VALUE(0); +} + +static int acpi_thermal_call_usermode(char *path) +{ + char *argv[2] = { NULL, NULL }; + char *envp[3] = { NULL, NULL, NULL }; + + ACPI_FUNCTION_TRACE("acpi_thermal_call_usermode"); + + if (!path) + return_VALUE(-EINVAL); + + argv[0] = path; + + /* minimal command environment */ + envp[0] = "HOME=/"; + envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; + + call_usermodehelper(argv[0], argv, envp, 0); + + return_VALUE(0); +} + +static int acpi_thermal_critical(struct acpi_thermal *tz) +{ + int result = 0; + struct acpi_device *device = NULL; + + ACPI_FUNCTION_TRACE("acpi_thermal_critical"); + + if (!tz || !tz->trips.critical.flags.valid) + return_VALUE(-EINVAL); + + if (tz->temperature >= tz->trips.critical.temperature) { + ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Critical trip point\n")); + tz->trips.critical.flags.enabled = 1; + } else if (tz->trips.critical.flags.enabled) + tz->trips.critical.flags.enabled = 0; + + result = acpi_bus_get_device(tz->handle, &device); + if (result) + return_VALUE(result); + + printk(KERN_EMERG + "Critical temperature reached (%ld C), shutting down.\n", + KELVIN_TO_CELSIUS(tz->temperature)); + acpi_bus_generate_event(device, ACPI_THERMAL_NOTIFY_CRITICAL, + tz->trips.critical.flags.enabled); + + acpi_thermal_call_usermode(ACPI_THERMAL_PATH_POWEROFF); + + return_VALUE(0); +} + +static int acpi_thermal_hot(struct acpi_thermal *tz) +{ + int result = 0; + struct acpi_device *device = NULL; + + ACPI_FUNCTION_TRACE("acpi_thermal_hot"); + + if (!tz || !tz->trips.hot.flags.valid) + return_VALUE(-EINVAL); + + if (tz->temperature >= tz->trips.hot.temperature) { + ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Hot trip point\n")); + tz->trips.hot.flags.enabled = 1; + } else if (tz->trips.hot.flags.enabled) + tz->trips.hot.flags.enabled = 0; + + result = acpi_bus_get_device(tz->handle, &device); + if (result) + return_VALUE(result); + + acpi_bus_generate_event(device, ACPI_THERMAL_NOTIFY_HOT, + tz->trips.hot.flags.enabled); + + /* TBD: Call user-mode "sleep(S4)" function */ + + return_VALUE(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; + + ACPI_FUNCTION_TRACE("acpi_thermal_passive"); + + 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; + + ACPI_FUNCTION_TRACE("acpi_thermal_active"); + + 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) { + ACPI_DEBUG_PRINT((ACPI_DB_WARN, + "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) { + ACPI_DEBUG_PRINT((ACPI_DB_WARN, + "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_queue_for_execution(OSD_PRIORITY_GPE, + acpi_thermal_check, (void *)data); +} + +static void acpi_thermal_check(void *data) +{ + int result = 0; + struct acpi_thermal *tz = (struct acpi_thermal *)data; + unsigned long sleep_time = 0; + int i = 0; + struct acpi_thermal_state state; + + ACPI_FUNCTION_TRACE("acpi_thermal_check"); + + if (!tz) { + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid (NULL) context.\n")); + return_VOID; + } + + state = tz->state; + + result = acpi_thermal_get_temperature(tz); + if (result) + return_VOID; + + 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; + else if (tz->polling_frequency > 0) + sleep_time = tz->polling_frequency * 100; + + 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), (HZ * sleep_time) / 1000); + else { + tz->timer.data = (unsigned long)tz; + tz->timer.function = acpi_thermal_run; + tz->timer.expires = jiffies + (HZ * sleep_time) / 1000; + add_timer(&(tz->timer)); + } + } + + return_VOID; +} + +/* -------------------------------------------------------------------------- + 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 = (struct acpi_thermal *)seq->private; + + ACPI_FUNCTION_TRACE("acpi_thermal_state_seq_show"); + + 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_VALUE(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 = (struct acpi_thermal *)seq->private; + + ACPI_FUNCTION_TRACE("acpi_thermal_temp_seq_show"); + + 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_VALUE(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 = (struct acpi_thermal *)seq->private; + int i = 0; + int j = 0; + + ACPI_FUNCTION_TRACE("acpi_thermal_trip_seq_show"); + + if (!tz) + goto end; + + if (tz->trips.critical.flags.valid) + seq_printf(seq, "critical (S5): %ld C\n", + KELVIN_TO_CELSIUS(tz->trips.critical.temperature)); + + if (tz->trips.hot.flags.valid) + seq_printf(seq, "hot (S4): %ld C\n", + KELVIN_TO_CELSIUS(tz->trips.hot.temperature)); + + 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++) { + + seq_printf(seq, "0x%p ", + tz->trips.passive.devices.handles[j]); + } + 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++) + seq_printf(seq, "0x%p ", + tz->trips.active[i].devices.handles[j]); + seq_puts(seq, "\n"); + } + + end: + return_VALUE(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 ssize_t +acpi_thermal_write_trip_points(struct file *file, + const char __user * buffer, + size_t count, loff_t * ppos) +{ + struct seq_file *m = (struct seq_file *)file->private_data; + struct acpi_thermal *tz = (struct acpi_thermal *)m->private; + + char *limit_string; + int num, critical, hot, passive; + int *active; + int i = 0; + + ACPI_FUNCTION_TRACE("acpi_thermal_write_trip_points"); + + limit_string = kmalloc(ACPI_THERMAL_MAX_LIMIT_STR_LEN, GFP_KERNEL); + if (!limit_string) + return_VALUE(-ENOMEM); + + memset(limit_string, 0, ACPI_THERMAL_MAX_LIMIT_STR_LEN); + + active = kmalloc(ACPI_THERMAL_MAX_ACTIVE * sizeof(int), GFP_KERNEL); + if (!active) + return_VALUE(-ENOMEM); + + if (!tz || (count > ACPI_THERMAL_MAX_LIMIT_STR_LEN - 1)) { + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid argument\n")); + count = -EINVAL; + goto end; + } + + if (copy_from_user(limit_string, buffer, count)) { + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data\n")); + count = -EFAULT; + goto end; + } + + limit_string[count] = '\0'; + + num = sscanf(limit_string, "%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d", + &critical, &hot, &passive, + &active[0], &active[1], &active[2], &active[3], &active[4], + &active[5], &active[6], &active[7], &active[8], + &active[9]); + if (!(num >= 5 && num < (ACPI_THERMAL_MAX_ACTIVE + 3))) { + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data format\n")); + count = -EINVAL; + goto end; + } + + tz->trips.critical.temperature = CELSIUS_TO_KELVIN(critical); + tz->trips.hot.temperature = CELSIUS_TO_KELVIN(hot); + tz->trips.passive.temperature = CELSIUS_TO_KELVIN(passive); + for (i = 0; i < num - 3; i++) { + if (!(tz->trips.active[i].flags.valid)) + break; + tz->trips.active[i].temperature = CELSIUS_TO_KELVIN(active[i]); + } + + end: + kfree(active); + kfree(limit_string); + return_VALUE(count); +} + +static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset) +{ + struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; + + ACPI_FUNCTION_TRACE("acpi_thermal_cooling_seq_show"); + + if (!tz) + goto end; + + if (!tz->flags.cooling_mode) { + seq_puts(seq, "\n"); + } + + if (tz->cooling_mode == ACPI_THERMAL_MODE_CRITICAL) + seq_printf(seq, "cooling mode: critical\n"); + else + seq_printf(seq, "cooling mode: %s\n", + tz->cooling_mode ? "passive" : "active"); + + end: + return_VALUE(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 = (struct seq_file *)file->private_data; + struct acpi_thermal *tz = (struct acpi_thermal *)m->private; + int result = 0; + char mode_string[12] = { '\0' }; + + ACPI_FUNCTION_TRACE("acpi_thermal_write_cooling_mode"); + + if (!tz || (count > sizeof(mode_string) - 1)) + return_VALUE(-EINVAL); + + if (!tz->flags.cooling_mode) + return_VALUE(-ENODEV); + + if (copy_from_user(mode_string, buffer, count)) + return_VALUE(-EFAULT); + + mode_string[count] = '\0'; + + result = acpi_thermal_set_cooling_mode(tz, + simple_strtoul(mode_string, NULL, + 0)); + if (result) + return_VALUE(result); + + acpi_thermal_check(tz); + + return_VALUE(count); +} + +static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) +{ + struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; + + ACPI_FUNCTION_TRACE("acpi_thermal_polling_seq_show"); + + if (!tz) + goto end; + + if (!tz->polling_frequency) { + seq_puts(seq, "\n"); + goto end; + } + + seq_printf(seq, "polling frequency: %lu seconds\n", + (tz->polling_frequency / 10)); + + end: + return_VALUE(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 = (struct seq_file *)file->private_data; + struct acpi_thermal *tz = (struct acpi_thermal *)m->private; + int result = 0; + char polling_string[12] = { '\0' }; + int seconds = 0; + + ACPI_FUNCTION_TRACE("acpi_thermal_write_polling"); + + if (!tz || (count > sizeof(polling_string) - 1)) + return_VALUE(-EINVAL); + + if (copy_from_user(polling_string, buffer, count)) + return_VALUE(-EFAULT); + + polling_string[count] = '\0'; + + seconds = simple_strtoul(polling_string, NULL, 0); + + result = acpi_thermal_set_polling(tz, seconds); + if (result) + return_VALUE(result); + + acpi_thermal_check(tz); + + return_VALUE(count); +} + +static int acpi_thermal_add_fs(struct acpi_device *device) +{ + struct proc_dir_entry *entry = NULL; + + ACPI_FUNCTION_TRACE("acpi_thermal_add_fs"); + + if (!acpi_device_dir(device)) { + acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), + acpi_thermal_dir); + if (!acpi_device_dir(device)) + return_VALUE(-ENODEV); + acpi_device_dir(device)->owner = THIS_MODULE; + } + + /* 'state' [R] */ + entry = create_proc_entry(ACPI_THERMAL_FILE_STATE, + S_IRUGO, acpi_device_dir(device)); + if (!entry) + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Unable to create '%s' fs entry\n", + ACPI_THERMAL_FILE_STATE)); + else { + entry->proc_fops = &acpi_thermal_state_fops; + entry->data = acpi_driver_data(device); + entry->owner = THIS_MODULE; + } + + /* 'temperature' [R] */ + entry = create_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, + S_IRUGO, acpi_device_dir(device)); + if (!entry) + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Unable to create '%s' fs entry\n", + ACPI_THERMAL_FILE_TEMPERATURE)); + else { + entry->proc_fops = &acpi_thermal_temp_fops; + entry->data = acpi_driver_data(device); + entry->owner = THIS_MODULE; + } + + /* 'trip_points' [R/W] */ + entry = create_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, + S_IFREG | S_IRUGO | S_IWUSR, + acpi_device_dir(device)); + if (!entry) + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Unable to create '%s' fs entry\n", + ACPI_THERMAL_FILE_TRIP_POINTS)); + else { + entry->proc_fops = &acpi_thermal_trip_fops; + entry->data = acpi_driver_data(device); + entry->owner = THIS_MODULE; + } + + /* 'cooling_mode' [R/W] */ + entry = create_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, + S_IFREG | S_IRUGO | S_IWUSR, + acpi_device_dir(device)); + if (!entry) + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Unable to create '%s' fs entry\n", + ACPI_THERMAL_FILE_COOLING_MODE)); + else { + entry->proc_fops = &acpi_thermal_cooling_fops; + entry->data = acpi_driver_data(device); + entry->owner = THIS_MODULE; + } + + /* 'polling_frequency' [R/W] */ + entry = create_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, + S_IFREG | S_IRUGO | S_IWUSR, + acpi_device_dir(device)); + if (!entry) + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Unable to create '%s' fs entry\n", + ACPI_THERMAL_FILE_POLLING_FREQ)); + else { + entry->proc_fops = &acpi_thermal_polling_fops; + entry->data = acpi_driver_data(device); + entry->owner = THIS_MODULE; + } + + return_VALUE(0); +} + +static int acpi_thermal_remove_fs(struct acpi_device *device) +{ + ACPI_FUNCTION_TRACE("acpi_thermal_remove_fs"); + + 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_VALUE(0); +} + +/* -------------------------------------------------------------------------- + Driver Interface + -------------------------------------------------------------------------- */ + +static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data) +{ + struct acpi_thermal *tz = (struct acpi_thermal *)data; + struct acpi_device *device = NULL; + + ACPI_FUNCTION_TRACE("acpi_thermal_notify"); + + if (!tz) + return_VOID; + + if (acpi_bus_get_device(tz->handle, &device)) + return_VOID; + + switch (event) { + case ACPI_THERMAL_NOTIFY_TEMPERATURE: + acpi_thermal_check(tz); + break; + case ACPI_THERMAL_NOTIFY_THRESHOLDS: + acpi_thermal_get_trip_points(tz); + acpi_thermal_check(tz); + acpi_bus_generate_event(device, event, 0); + break; + case ACPI_THERMAL_NOTIFY_DEVICES: + if (tz->flags.devices) + acpi_thermal_get_devices(tz); + acpi_bus_generate_event(device, event, 0); + break; + default: + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Unsupported event [0x%x]\n", event)); + break; + } + + return_VOID; +} + +static int acpi_thermal_get_info(struct acpi_thermal *tz) +{ + int result = 0; + + ACPI_FUNCTION_TRACE("acpi_thermal_get_info"); + + if (!tz) + return_VALUE(-EINVAL); + + /* Get temperature [_TMP] (required) */ + result = acpi_thermal_get_temperature(tz); + if (result) + return_VALUE(result); + + /* Get trip points [_CRT, _PSV, etc.] (required) */ + result = acpi_thermal_get_trip_points(tz); + if (result) + return_VALUE(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; + else { + /* Oh,we have not _SCP method. + Generally show cooling_mode by _ACx, _PSV,spec 12.2 */ + tz->flags.cooling_mode = 0; + if (tz->trips.active[0].flags.valid + && tz->trips.passive.flags.valid) { + if (tz->trips.passive.temperature > + tz->trips.active[0].temperature) + tz->cooling_mode = ACPI_THERMAL_MODE_ACTIVE; + else + tz->cooling_mode = ACPI_THERMAL_MODE_PASSIVE; + } else if (!tz->trips.active[0].flags.valid + && tz->trips.passive.flags.valid) { + tz->cooling_mode = ACPI_THERMAL_MODE_PASSIVE; + } else if (tz->trips.active[0].flags.valid + && !tz->trips.passive.flags.valid) { + tz->cooling_mode = ACPI_THERMAL_MODE_ACTIVE; + } else { + /* _ACx and _PSV are optional, but _CRT is required */ + tz->cooling_mode = ACPI_THERMAL_MODE_CRITICAL; + } + } + + /* Get default polling frequency [_TZP] (optional) */ + if (tzp) + tz->polling_frequency = tzp; + else + acpi_thermal_get_polling_frequency(tz); + + /* Get devices in this thermal zone [_TZD] (optional) */ + result = acpi_thermal_get_devices(tz); + if (!result) + tz->flags.devices = 1; + + return_VALUE(0); +} + +static int acpi_thermal_add(struct acpi_device *device) +{ + int result = 0; + acpi_status status = AE_OK; + struct acpi_thermal *tz = NULL; + + ACPI_FUNCTION_TRACE("acpi_thermal_add"); + + if (!device) + return_VALUE(-EINVAL); + + tz = kmalloc(sizeof(struct acpi_thermal), GFP_KERNEL); + if (!tz) + return_VALUE(-ENOMEM); + memset(tz, 0, sizeof(struct acpi_thermal)); + + tz->handle = device->handle; + strcpy(tz->name, device->pnp.bus_id); + strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); + strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); + acpi_driver_data(device) = tz; + + result = acpi_thermal_get_info(tz); + if (result) + goto end; + + result = acpi_thermal_add_fs(device); + if (result) + return_VALUE(result); + + init_timer(&tz->timer); + + acpi_thermal_check(tz); + + status = acpi_install_notify_handler(tz->handle, + ACPI_DEVICE_NOTIFY, + acpi_thermal_notify, tz); + if (ACPI_FAILURE(status)) { + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Error installing notify handler\n")); + result = -ENODEV; + goto end; + } + + printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", + acpi_device_name(device), acpi_device_bid(device), + KELVIN_TO_CELSIUS(tz->temperature)); + + end: + if (result) { + acpi_thermal_remove_fs(device); + kfree(tz); + } + + return_VALUE(result); +} + +static int acpi_thermal_remove(struct acpi_device *device, int type) +{ + acpi_status status = AE_OK; + struct acpi_thermal *tz = NULL; + + ACPI_FUNCTION_TRACE("acpi_thermal_remove"); + + if (!device || !acpi_driver_data(device)) + return_VALUE(-EINVAL); + + tz = (struct acpi_thermal *)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(tz->handle, + ACPI_DEVICE_NOTIFY, + acpi_thermal_notify); + if (ACPI_FAILURE(status)) + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Error removing notify handler\n")); + + /* 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); + + kfree(tz); + return_VALUE(0); +} + +static int __init acpi_thermal_init(void) +{ + int result = 0; + + ACPI_FUNCTION_TRACE("acpi_thermal_init"); + + acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); + if (!acpi_thermal_dir) + return_VALUE(-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_VALUE(-ENODEV); + } + + return_VALUE(0); +} + +static void __exit acpi_thermal_exit(void) +{ + ACPI_FUNCTION_TRACE("acpi_thermal_exit"); + + acpi_bus_unregister_driver(&acpi_thermal_driver); + + remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); + + return_VOID; +} + +module_init(acpi_thermal_init); +module_exit(acpi_thermal_exit); diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c deleted file mode 100644 index 19f3ea4..0000000 --- a/drivers/acpi/thermal.c +++ /dev/null @@ -1,1451 +0,0 @@ -/* - * acpi_thermal.c - ACPI Thermal Zone Driver ($Revision: 41 $) - * - * Copyright (C) 2001, 2002 Andy Grover - * Copyright (C) 2001, 2002 Paul Diefenbaugh - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - * This driver fully implements the ACPI thermal policy as described in the - * ACPI 2.0 Specification. - * - * TBD: 1. Implement passive cooling hysteresis. - * 2. Enhance passive cooling (CPU) states/limit interface to support - * concepts of 'multiple limiters', upper/lower limits, etc. - * - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -#define ACPI_THERMAL_COMPONENT 0x04000000 -#define ACPI_THERMAL_CLASS "thermal_zone" -#define ACPI_THERMAL_DRIVER_NAME "ACPI Thermal Zone Driver" -#define ACPI_THERMAL_DEVICE_NAME "Thermal Zone" -#define ACPI_THERMAL_FILE_STATE "state" -#define ACPI_THERMAL_FILE_TEMPERATURE "temperature" -#define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points" -#define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode" -#define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency" -#define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80 -#define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81 -#define ACPI_THERMAL_NOTIFY_DEVICES 0x82 -#define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0 -#define ACPI_THERMAL_NOTIFY_HOT 0xF1 -#define ACPI_THERMAL_MODE_ACTIVE 0x00 -#define ACPI_THERMAL_MODE_PASSIVE 0x01 -#define ACPI_THERMAL_MODE_CRITICAL 0xff -#define ACPI_THERMAL_PATH_POWEROFF "/sbin/poweroff" - -#define ACPI_THERMAL_MAX_ACTIVE 10 -#define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 - -#define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732>=0) ? ((long)t-2732+5)/10 : ((long)t-2732-5)/10) -#define CELSIUS_TO_KELVIN(t) ((t+273)*10) - -#define _COMPONENT ACPI_THERMAL_COMPONENT -ACPI_MODULE_NAME("acpi_thermal") - -MODULE_AUTHOR("Paul Diefenbaugh"); -MODULE_DESCRIPTION(ACPI_THERMAL_DRIVER_NAME); -MODULE_LICENSE("GPL"); - -static int tzp; -module_param(tzp, int, 0); -MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n"); - -static int acpi_thermal_add(struct acpi_device *device); -static int acpi_thermal_remove(struct acpi_device *device, int type); -static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file); -static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file); -static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file); -static ssize_t acpi_thermal_write_trip_points(struct file *, - const char __user *, size_t, - loff_t *); -static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file); -static ssize_t acpi_thermal_write_cooling_mode(struct file *, - const char __user *, size_t, - loff_t *); -static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file); -static ssize_t acpi_thermal_write_polling(struct file *, const char __user *, - size_t, loff_t *); - -static struct acpi_driver acpi_thermal_driver = { - .name = ACPI_THERMAL_DRIVER_NAME, - .class = ACPI_THERMAL_CLASS, - .ids = ACPI_THERMAL_HID, - .ops = { - .add = acpi_thermal_add, - .remove = acpi_thermal_remove, - }, -}; - -struct acpi_thermal_state { - u8 critical:1; - u8 hot:1; - u8 passive:1; - u8 active:1; - u8 reserved:4; - int active_index; -}; - -struct acpi_thermal_state_flags { - u8 valid:1; - u8 enabled:1; - u8 reserved:6; -}; - -struct acpi_thermal_critical { - struct acpi_thermal_state_flags flags; - unsigned long temperature; -}; - -struct acpi_thermal_hot { - struct acpi_thermal_state_flags flags; - unsigned long temperature; -}; - -struct acpi_thermal_passive { - struct acpi_thermal_state_flags flags; - unsigned long temperature; - unsigned long tc1; - unsigned long tc2; - unsigned long tsp; - struct acpi_handle_list devices; -}; - -struct acpi_thermal_active { - struct acpi_thermal_state_flags flags; - unsigned long temperature; - struct acpi_handle_list devices; -}; - -struct acpi_thermal_trips { - struct acpi_thermal_critical critical; - struct acpi_thermal_hot hot; - struct acpi_thermal_passive passive; - struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; -}; - -struct acpi_thermal_flags { - u8 cooling_mode:1; /* _SCP */ - u8 devices:1; /* _TZD */ - u8 reserved:6; -}; - -struct acpi_thermal { - acpi_handle handle; - acpi_bus_id name; - unsigned long temperature; - unsigned long last_temperature; - unsigned long polling_frequency; - u8 cooling_mode; - volatile u8 zombie; - struct acpi_thermal_flags flags; - struct acpi_thermal_state state; - struct acpi_thermal_trips trips; - struct acpi_handle_list devices; - struct timer_list timer; -}; - -static struct file_operations acpi_thermal_state_fops = { - .open = acpi_thermal_state_open_fs, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static struct file_operations acpi_thermal_temp_fops = { - .open = acpi_thermal_temp_open_fs, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static struct file_operations acpi_thermal_trip_fops = { - .open = acpi_thermal_trip_open_fs, - .read = seq_read, - .write = acpi_thermal_write_trip_points, - .llseek = seq_lseek, - .release = single_release, -}; - -static struct file_operations acpi_thermal_cooling_fops = { - .open = acpi_thermal_cooling_open_fs, - .read = seq_read, - .write = acpi_thermal_write_cooling_mode, - .llseek = seq_lseek, - .release = single_release, -}; - -static struct file_operations acpi_thermal_polling_fops = { - .open = acpi_thermal_polling_open_fs, - .read = seq_read, - .write = acpi_thermal_write_polling, - .llseek = seq_lseek, - .release = single_release, -}; - -/* -------------------------------------------------------------------------- - Thermal Zone Management - -------------------------------------------------------------------------- */ - -static int acpi_thermal_get_temperature(struct acpi_thermal *tz) -{ - acpi_status status = AE_OK; - - ACPI_FUNCTION_TRACE("acpi_thermal_get_temperature"); - - if (!tz) - return_VALUE(-EINVAL); - - tz->last_temperature = tz->temperature; - - status = - acpi_evaluate_integer(tz->handle, "_TMP", NULL, &tz->temperature); - if (ACPI_FAILURE(status)) - return_VALUE(-ENODEV); - - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", - tz->temperature)); - - return_VALUE(0); -} - -static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) -{ - acpi_status status = AE_OK; - - ACPI_FUNCTION_TRACE("acpi_thermal_get_polling_frequency"); - - if (!tz) - return_VALUE(-EINVAL); - - status = - acpi_evaluate_integer(tz->handle, "_TZP", NULL, - &tz->polling_frequency); - if (ACPI_FAILURE(status)) - return_VALUE(-ENODEV); - - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", - tz->polling_frequency)); - - return_VALUE(0); -} - -static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds) -{ - ACPI_FUNCTION_TRACE("acpi_thermal_set_polling"); - - if (!tz) - return_VALUE(-EINVAL); - - tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */ - - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Polling frequency set to %lu seconds\n", - tz->polling_frequency)); - - return_VALUE(0); -} - -static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) -{ - acpi_status status = AE_OK; - union acpi_object arg0 = { ACPI_TYPE_INTEGER }; - struct acpi_object_list arg_list = { 1, &arg0 }; - acpi_handle handle = NULL; - - ACPI_FUNCTION_TRACE("acpi_thermal_set_cooling_mode"); - - if (!tz) - return_VALUE(-EINVAL); - - status = acpi_get_handle(tz->handle, "_SCP", &handle); - if (ACPI_FAILURE(status)) { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); - return_VALUE(-ENODEV); - } - - arg0.integer.value = mode; - - status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); - if (ACPI_FAILURE(status)) - return_VALUE(-ENODEV); - - tz->cooling_mode = mode; - - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Cooling mode [%s]\n", - mode ? "passive" : "active")); - - return_VALUE(0); -} - -static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) -{ - acpi_status status = AE_OK; - int i = 0; - - ACPI_FUNCTION_TRACE("acpi_thermal_get_trip_points"); - - if (!tz) - return_VALUE(-EINVAL); - - /* Critical Shutdown (required) */ - - status = acpi_evaluate_integer(tz->handle, "_CRT", NULL, - &tz->trips.critical.temperature); - if (ACPI_FAILURE(status)) { - tz->trips.critical.flags.valid = 0; - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "No critical threshold\n")); - return_VALUE(-ENODEV); - } else { - tz->trips.critical.flags.valid = 1; - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Found critical threshold [%lu]\n", - tz->trips.critical.temperature)); - } - - /* Critical Sleep (optional) */ - - status = - acpi_evaluate_integer(tz->handle, "_HOT", NULL, - &tz->trips.hot.temperature); - if (ACPI_FAILURE(status)) { - tz->trips.hot.flags.valid = 0; - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No hot threshold\n")); - } else { - tz->trips.hot.flags.valid = 1; - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found hot threshold [%lu]\n", - tz->trips.hot.temperature)); - } - - /* Passive: Processors (optional) */ - - status = - acpi_evaluate_integer(tz->handle, "_PSV", NULL, - &tz->trips.passive.temperature); - if (ACPI_FAILURE(status)) { - tz->trips.passive.flags.valid = 0; - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No passive threshold\n")); - } else { - tz->trips.passive.flags.valid = 1; - - status = - acpi_evaluate_integer(tz->handle, "_TC1", NULL, - &tz->trips.passive.tc1); - if (ACPI_FAILURE(status)) - tz->trips.passive.flags.valid = 0; - - status = - acpi_evaluate_integer(tz->handle, "_TC2", NULL, - &tz->trips.passive.tc2); - if (ACPI_FAILURE(status)) - tz->trips.passive.flags.valid = 0; - - status = - acpi_evaluate_integer(tz->handle, "_TSP", NULL, - &tz->trips.passive.tsp); - if (ACPI_FAILURE(status)) - tz->trips.passive.flags.valid = 0; - - status = - acpi_evaluate_reference(tz->handle, "_PSL", NULL, - &tz->trips.passive.devices); - if (ACPI_FAILURE(status)) - tz->trips.passive.flags.valid = 0; - - if (!tz->trips.passive.flags.valid) - ACPI_DEBUG_PRINT((ACPI_DB_WARN, - "Invalid passive threshold\n")); - else - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Found passive threshold [%lu]\n", - tz->trips.passive.temperature)); - } - - /* Active: Fans, etc. (optional) */ - - for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { - - char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; - - status = - acpi_evaluate_integer(tz->handle, name, NULL, - &tz->trips.active[i].temperature); - if (ACPI_FAILURE(status)) - break; - - name[2] = 'L'; - status = - acpi_evaluate_reference(tz->handle, name, NULL, - &tz->trips.active[i].devices); - if (ACPI_SUCCESS(status)) { - tz->trips.active[i].flags.valid = 1; - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Found active threshold [%d]:[%lu]\n", - i, tz->trips.active[i].temperature)); - } else - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Invalid active threshold [%d]\n", - i)); - } - - return_VALUE(0); -} - -static int acpi_thermal_get_devices(struct acpi_thermal *tz) -{ - acpi_status status = AE_OK; - - ACPI_FUNCTION_TRACE("acpi_thermal_get_devices"); - - if (!tz) - return_VALUE(-EINVAL); - - status = - acpi_evaluate_reference(tz->handle, "_TZD", NULL, &tz->devices); - if (ACPI_FAILURE(status)) - return_VALUE(-ENODEV); - - return_VALUE(0); -} - -static int acpi_thermal_call_usermode(char *path) -{ - char *argv[2] = { NULL, NULL }; - char *envp[3] = { NULL, NULL, NULL }; - - ACPI_FUNCTION_TRACE("acpi_thermal_call_usermode"); - - if (!path) - return_VALUE(-EINVAL); - - argv[0] = path; - - /* minimal command environment */ - envp[0] = "HOME=/"; - envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; - - call_usermodehelper(argv[0], argv, envp, 0); - - return_VALUE(0); -} - -static int acpi_thermal_critical(struct acpi_thermal *tz) -{ - int result = 0; - struct acpi_device *device = NULL; - - ACPI_FUNCTION_TRACE("acpi_thermal_critical"); - - if (!tz || !tz->trips.critical.flags.valid) - return_VALUE(-EINVAL); - - if (tz->temperature >= tz->trips.critical.temperature) { - ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Critical trip point\n")); - tz->trips.critical.flags.enabled = 1; - } else if (tz->trips.critical.flags.enabled) - tz->trips.critical.flags.enabled = 0; - - result = acpi_bus_get_device(tz->handle, &device); - if (result) - return_VALUE(result); - - printk(KERN_EMERG - "Critical temperature reached (%ld C), shutting down.\n", - KELVIN_TO_CELSIUS(tz->temperature)); - acpi_bus_generate_event(device, ACPI_THERMAL_NOTIFY_CRITICAL, - tz->trips.critical.flags.enabled); - - acpi_thermal_call_usermode(ACPI_THERMAL_PATH_POWEROFF); - - return_VALUE(0); -} - -static int acpi_thermal_hot(struct acpi_thermal *tz) -{ - int result = 0; - struct acpi_device *device = NULL; - - ACPI_FUNCTION_TRACE("acpi_thermal_hot"); - - if (!tz || !tz->trips.hot.flags.valid) - return_VALUE(-EINVAL); - - if (tz->temperature >= tz->trips.hot.temperature) { - ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Hot trip point\n")); - tz->trips.hot.flags.enabled = 1; - } else if (tz->trips.hot.flags.enabled) - tz->trips.hot.flags.enabled = 0; - - result = acpi_bus_get_device(tz->handle, &device); - if (result) - return_VALUE(result); - - acpi_bus_generate_event(device, ACPI_THERMAL_NOTIFY_HOT, - tz->trips.hot.flags.enabled); - - /* TBD: Call user-mode "sleep(S4)" function */ - - return_VALUE(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; - - ACPI_FUNCTION_TRACE("acpi_thermal_passive"); - - 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; - - ACPI_FUNCTION_TRACE("acpi_thermal_active"); - - 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) { - ACPI_DEBUG_PRINT((ACPI_DB_WARN, - "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) { - ACPI_DEBUG_PRINT((ACPI_DB_WARN, - "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_queue_for_execution(OSD_PRIORITY_GPE, - acpi_thermal_check, (void *)data); -} - -static void acpi_thermal_check(void *data) -{ - int result = 0; - struct acpi_thermal *tz = (struct acpi_thermal *)data; - unsigned long sleep_time = 0; - int i = 0; - struct acpi_thermal_state state; - - ACPI_FUNCTION_TRACE("acpi_thermal_check"); - - if (!tz) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid (NULL) context.\n")); - return_VOID; - } - - state = tz->state; - - result = acpi_thermal_get_temperature(tz); - if (result) - return_VOID; - - 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; - else if (tz->polling_frequency > 0) - sleep_time = tz->polling_frequency * 100; - - 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), (HZ * sleep_time) / 1000); - else { - tz->timer.data = (unsigned long)tz; - tz->timer.function = acpi_thermal_run; - tz->timer.expires = jiffies + (HZ * sleep_time) / 1000; - add_timer(&(tz->timer)); - } - } - - return_VOID; -} - -/* -------------------------------------------------------------------------- - 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 = (struct acpi_thermal *)seq->private; - - ACPI_FUNCTION_TRACE("acpi_thermal_state_seq_show"); - - 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_VALUE(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 = (struct acpi_thermal *)seq->private; - - ACPI_FUNCTION_TRACE("acpi_thermal_temp_seq_show"); - - 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_VALUE(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 = (struct acpi_thermal *)seq->private; - int i = 0; - int j = 0; - - ACPI_FUNCTION_TRACE("acpi_thermal_trip_seq_show"); - - if (!tz) - goto end; - - if (tz->trips.critical.flags.valid) - seq_printf(seq, "critical (S5): %ld C\n", - KELVIN_TO_CELSIUS(tz->trips.critical.temperature)); - - if (tz->trips.hot.flags.valid) - seq_printf(seq, "hot (S4): %ld C\n", - KELVIN_TO_CELSIUS(tz->trips.hot.temperature)); - - 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++) { - - seq_printf(seq, "0x%p ", - tz->trips.passive.devices.handles[j]); - } - 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++) - seq_printf(seq, "0x%p ", - tz->trips.active[i].devices.handles[j]); - seq_puts(seq, "\n"); - } - - end: - return_VALUE(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 ssize_t -acpi_thermal_write_trip_points(struct file *file, - const char __user * buffer, - size_t count, loff_t * ppos) -{ - struct seq_file *m = (struct seq_file *)file->private_data; - struct acpi_thermal *tz = (struct acpi_thermal *)m->private; - - char *limit_string; - int num, critical, hot, passive; - int *active; - int i = 0; - - ACPI_FUNCTION_TRACE("acpi_thermal_write_trip_points"); - - limit_string = kmalloc(ACPI_THERMAL_MAX_LIMIT_STR_LEN, GFP_KERNEL); - if (!limit_string) - return_VALUE(-ENOMEM); - - memset(limit_string, 0, ACPI_THERMAL_MAX_LIMIT_STR_LEN); - - active = kmalloc(ACPI_THERMAL_MAX_ACTIVE * sizeof(int), GFP_KERNEL); - if (!active) - return_VALUE(-ENOMEM); - - if (!tz || (count > ACPI_THERMAL_MAX_LIMIT_STR_LEN - 1)) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid argument\n")); - count = -EINVAL; - goto end; - } - - if (copy_from_user(limit_string, buffer, count)) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data\n")); - count = -EFAULT; - goto end; - } - - limit_string[count] = '\0'; - - num = sscanf(limit_string, "%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d", - &critical, &hot, &passive, - &active[0], &active[1], &active[2], &active[3], &active[4], - &active[5], &active[6], &active[7], &active[8], - &active[9]); - if (!(num >= 5 && num < (ACPI_THERMAL_MAX_ACTIVE + 3))) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data format\n")); - count = -EINVAL; - goto end; - } - - tz->trips.critical.temperature = CELSIUS_TO_KELVIN(critical); - tz->trips.hot.temperature = CELSIUS_TO_KELVIN(hot); - tz->trips.passive.temperature = CELSIUS_TO_KELVIN(passive); - for (i = 0; i < num - 3; i++) { - if (!(tz->trips.active[i].flags.valid)) - break; - tz->trips.active[i].temperature = CELSIUS_TO_KELVIN(active[i]); - } - - end: - kfree(active); - kfree(limit_string); - return_VALUE(count); -} - -static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset) -{ - struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; - - ACPI_FUNCTION_TRACE("acpi_thermal_cooling_seq_show"); - - if (!tz) - goto end; - - if (!tz->flags.cooling_mode) { - seq_puts(seq, "\n"); - } - - if (tz->cooling_mode == ACPI_THERMAL_MODE_CRITICAL) - seq_printf(seq, "cooling mode: critical\n"); - else - seq_printf(seq, "cooling mode: %s\n", - tz->cooling_mode ? "passive" : "active"); - - end: - return_VALUE(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 = (struct seq_file *)file->private_data; - struct acpi_thermal *tz = (struct acpi_thermal *)m->private; - int result = 0; - char mode_string[12] = { '\0' }; - - ACPI_FUNCTION_TRACE("acpi_thermal_write_cooling_mode"); - - if (!tz || (count > sizeof(mode_string) - 1)) - return_VALUE(-EINVAL); - - if (!tz->flags.cooling_mode) - return_VALUE(-ENODEV); - - if (copy_from_user(mode_string, buffer, count)) - return_VALUE(-EFAULT); - - mode_string[count] = '\0'; - - result = acpi_thermal_set_cooling_mode(tz, - simple_strtoul(mode_string, NULL, - 0)); - if (result) - return_VALUE(result); - - acpi_thermal_check(tz); - - return_VALUE(count); -} - -static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) -{ - struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; - - ACPI_FUNCTION_TRACE("acpi_thermal_polling_seq_show"); - - if (!tz) - goto end; - - if (!tz->polling_frequency) { - seq_puts(seq, "\n"); - goto end; - } - - seq_printf(seq, "polling frequency: %lu seconds\n", - (tz->polling_frequency / 10)); - - end: - return_VALUE(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 = (struct seq_file *)file->private_data; - struct acpi_thermal *tz = (struct acpi_thermal *)m->private; - int result = 0; - char polling_string[12] = { '\0' }; - int seconds = 0; - - ACPI_FUNCTION_TRACE("acpi_thermal_write_polling"); - - if (!tz || (count > sizeof(polling_string) - 1)) - return_VALUE(-EINVAL); - - if (copy_from_user(polling_string, buffer, count)) - return_VALUE(-EFAULT); - - polling_string[count] = '\0'; - - seconds = simple_strtoul(polling_string, NULL, 0); - - result = acpi_thermal_set_polling(tz, seconds); - if (result) - return_VALUE(result); - - acpi_thermal_check(tz); - - return_VALUE(count); -} - -static int acpi_thermal_add_fs(struct acpi_device *device) -{ - struct proc_dir_entry *entry = NULL; - - ACPI_FUNCTION_TRACE("acpi_thermal_add_fs"); - - if (!acpi_device_dir(device)) { - acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), - acpi_thermal_dir); - if (!acpi_device_dir(device)) - return_VALUE(-ENODEV); - acpi_device_dir(device)->owner = THIS_MODULE; - } - - /* 'state' [R] */ - entry = create_proc_entry(ACPI_THERMAL_FILE_STATE, - S_IRUGO, acpi_device_dir(device)); - if (!entry) - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Unable to create '%s' fs entry\n", - ACPI_THERMAL_FILE_STATE)); - else { - entry->proc_fops = &acpi_thermal_state_fops; - entry->data = acpi_driver_data(device); - entry->owner = THIS_MODULE; - } - - /* 'temperature' [R] */ - entry = create_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, - S_IRUGO, acpi_device_dir(device)); - if (!entry) - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Unable to create '%s' fs entry\n", - ACPI_THERMAL_FILE_TEMPERATURE)); - else { - entry->proc_fops = &acpi_thermal_temp_fops; - entry->data = acpi_driver_data(device); - entry->owner = THIS_MODULE; - } - - /* 'trip_points' [R/W] */ - entry = create_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, - S_IFREG | S_IRUGO | S_IWUSR, - acpi_device_dir(device)); - if (!entry) - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Unable to create '%s' fs entry\n", - ACPI_THERMAL_FILE_TRIP_POINTS)); - else { - entry->proc_fops = &acpi_thermal_trip_fops; - entry->data = acpi_driver_data(device); - entry->owner = THIS_MODULE; - } - - /* 'cooling_mode' [R/W] */ - entry = create_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, - S_IFREG | S_IRUGO | S_IWUSR, - acpi_device_dir(device)); - if (!entry) - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Unable to create '%s' fs entry\n", - ACPI_THERMAL_FILE_COOLING_MODE)); - else { - entry->proc_fops = &acpi_thermal_cooling_fops; - entry->data = acpi_driver_data(device); - entry->owner = THIS_MODULE; - } - - /* 'polling_frequency' [R/W] */ - entry = create_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, - S_IFREG | S_IRUGO | S_IWUSR, - acpi_device_dir(device)); - if (!entry) - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Unable to create '%s' fs entry\n", - ACPI_THERMAL_FILE_POLLING_FREQ)); - else { - entry->proc_fops = &acpi_thermal_polling_fops; - entry->data = acpi_driver_data(device); - entry->owner = THIS_MODULE; - } - - return_VALUE(0); -} - -static int acpi_thermal_remove_fs(struct acpi_device *device) -{ - ACPI_FUNCTION_TRACE("acpi_thermal_remove_fs"); - - 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_VALUE(0); -} - -/* -------------------------------------------------------------------------- - Driver Interface - -------------------------------------------------------------------------- */ - -static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data) -{ - struct acpi_thermal *tz = (struct acpi_thermal *)data; - struct acpi_device *device = NULL; - - ACPI_FUNCTION_TRACE("acpi_thermal_notify"); - - if (!tz) - return_VOID; - - if (acpi_bus_get_device(tz->handle, &device)) - return_VOID; - - switch (event) { - case ACPI_THERMAL_NOTIFY_TEMPERATURE: - acpi_thermal_check(tz); - break; - case ACPI_THERMAL_NOTIFY_THRESHOLDS: - acpi_thermal_get_trip_points(tz); - acpi_thermal_check(tz); - acpi_bus_generate_event(device, event, 0); - break; - case ACPI_THERMAL_NOTIFY_DEVICES: - if (tz->flags.devices) - acpi_thermal_get_devices(tz); - acpi_bus_generate_event(device, event, 0); - break; - default: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Unsupported event [0x%x]\n", event)); - break; - } - - return_VOID; -} - -static int acpi_thermal_get_info(struct acpi_thermal *tz) -{ - int result = 0; - - ACPI_FUNCTION_TRACE("acpi_thermal_get_info"); - - if (!tz) - return_VALUE(-EINVAL); - - /* Get temperature [_TMP] (required) */ - result = acpi_thermal_get_temperature(tz); - if (result) - return_VALUE(result); - - /* Get trip points [_CRT, _PSV, etc.] (required) */ - result = acpi_thermal_get_trip_points(tz); - if (result) - return_VALUE(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; - else { - /* Oh,we have not _SCP method. - Generally show cooling_mode by _ACx, _PSV,spec 12.2 */ - tz->flags.cooling_mode = 0; - if (tz->trips.active[0].flags.valid - && tz->trips.passive.flags.valid) { - if (tz->trips.passive.temperature > - tz->trips.active[0].temperature) - tz->cooling_mode = ACPI_THERMAL_MODE_ACTIVE; - else - tz->cooling_mode = ACPI_THERMAL_MODE_PASSIVE; - } else if (!tz->trips.active[0].flags.valid - && tz->trips.passive.flags.valid) { - tz->cooling_mode = ACPI_THERMAL_MODE_PASSIVE; - } else if (tz->trips.active[0].flags.valid - && !tz->trips.passive.flags.valid) { - tz->cooling_mode = ACPI_THERMAL_MODE_ACTIVE; - } else { - /* _ACx and _PSV are optional, but _CRT is required */ - tz->cooling_mode = ACPI_THERMAL_MODE_CRITICAL; - } - } - - /* Get default polling frequency [_TZP] (optional) */ - if (tzp) - tz->polling_frequency = tzp; - else - acpi_thermal_get_polling_frequency(tz); - - /* Get devices in this thermal zone [_TZD] (optional) */ - result = acpi_thermal_get_devices(tz); - if (!result) - tz->flags.devices = 1; - - return_VALUE(0); -} - -static int acpi_thermal_add(struct acpi_device *device) -{ - int result = 0; - acpi_status status = AE_OK; - struct acpi_thermal *tz = NULL; - - ACPI_FUNCTION_TRACE("acpi_thermal_add"); - - if (!device) - return_VALUE(-EINVAL); - - tz = kmalloc(sizeof(struct acpi_thermal), GFP_KERNEL); - if (!tz) - return_VALUE(-ENOMEM); - memset(tz, 0, sizeof(struct acpi_thermal)); - - tz->handle = device->handle; - strcpy(tz->name, device->pnp.bus_id); - strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); - strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); - acpi_driver_data(device) = tz; - - result = acpi_thermal_get_info(tz); - if (result) - goto end; - - result = acpi_thermal_add_fs(device); - if (result) - return_VALUE(result); - - init_timer(&tz->timer); - - acpi_thermal_check(tz); - - status = acpi_install_notify_handler(tz->handle, - ACPI_DEVICE_NOTIFY, - acpi_thermal_notify, tz); - if (ACPI_FAILURE(status)) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Error installing notify handler\n")); - result = -ENODEV; - goto end; - } - - printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", - acpi_device_name(device), acpi_device_bid(device), - KELVIN_TO_CELSIUS(tz->temperature)); - - end: - if (result) { - acpi_thermal_remove_fs(device); - kfree(tz); - } - - return_VALUE(result); -} - -static int acpi_thermal_remove(struct acpi_device *device, int type) -{ - acpi_status status = AE_OK; - struct acpi_thermal *tz = NULL; - - ACPI_FUNCTION_TRACE("acpi_thermal_remove"); - - if (!device || !acpi_driver_data(device)) - return_VALUE(-EINVAL); - - tz = (struct acpi_thermal *)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(tz->handle, - ACPI_DEVICE_NOTIFY, - acpi_thermal_notify); - if (ACPI_FAILURE(status)) - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Error removing notify handler\n")); - - /* 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); - - kfree(tz); - return_VALUE(0); -} - -static int __init acpi_thermal_init(void) -{ - int result = 0; - - ACPI_FUNCTION_TRACE("acpi_thermal_init"); - - acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); - if (!acpi_thermal_dir) - return_VALUE(-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_VALUE(-ENODEV); - } - - return_VALUE(0); -} - -static void __exit acpi_thermal_exit(void) -{ - ACPI_FUNCTION_TRACE("acpi_thermal_exit"); - - acpi_bus_unregister_driver(&acpi_thermal_driver); - - remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); - - return_VOID; -} - -module_init(acpi_thermal_init); -module_exit(acpi_thermal_exit); --- 0.99.9.GIT