diff options
Diffstat (limited to 'drivers/acpi/thermal.c')
| -rw-r--r-- | drivers/acpi/thermal.c | 539 |
1 files changed, 99 insertions, 440 deletions
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c index 99e6f1f8ea4..6b959976b7a 100644 --- a/drivers/acpi/thermal.c +++ b/drivers/acpi/thermal.c @@ -37,11 +37,11 @@ #include <linux/init.h> #include <linux/types.h> #include <linux/proc_fs.h> -#include <linux/timer.h> #include <linux/jiffies.h> #include <linux/kmod.h> #include <linux/seq_file.h> #include <linux/reboot.h> +#include <linux/device.h> #include <asm/uaccess.h> #include <linux/thermal.h> #include <acpi/acpi_bus.h> @@ -190,7 +190,6 @@ struct acpi_thermal { struct acpi_thermal_state state; struct acpi_thermal_trips trips; struct acpi_handle_list devices; - struct timer_list timer; struct thermal_zone_device *thermal_zone; int tz_enabled; struct mutex lock; @@ -290,6 +289,11 @@ static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds) tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */ + tz->thermal_zone->polling_delay = seconds * 1000; + + if (tz->tz_enabled) + thermal_zone_device_update(tz->thermal_zone); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency set to %lu seconds\n", tz->polling_frequency/10)); @@ -569,392 +573,18 @@ 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, - dev_name(&tz->device->dev), - 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, - dev_name(&tz->device->dev), - 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); + thermal_zone_device_update(tz->thermal_zone); } /* 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) +static int thermal_get_temp(struct thermal_zone_device *thermal, + unsigned long *temp) { struct acpi_thermal *tz = thermal->devdata; int result; @@ -966,25 +596,28 @@ static int thermal_get_temp(struct thermal_zone_device *thermal, char *buf) if (result) return result; - return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(tz->temperature)); + *temp = KELVIN_TO_MILLICELSIUS(tz->temperature); + return 0; } static const char enabled[] = "kernel"; static const char disabled[] = "user"; static int thermal_get_mode(struct thermal_zone_device *thermal, - char *buf) + enum thermal_device_mode *mode) { struct acpi_thermal *tz = thermal->devdata; if (!tz) return -EINVAL; - return sprintf(buf, "%s\n", tz->tz_enabled ? - enabled : disabled); + *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED : + THERMAL_DEVICE_DISABLED; + + return 0; } static int thermal_set_mode(struct thermal_zone_device *thermal, - const char *buf) + enum thermal_device_mode mode) { struct acpi_thermal *tz = thermal->devdata; int enable; @@ -995,9 +628,9 @@ static int thermal_set_mode(struct thermal_zone_device *thermal, /* * enable/disable thermal management from ACPI thermal driver */ - if (!strncmp(buf, enabled, sizeof enabled - 1)) + if (mode == THERMAL_DEVICE_ENABLED) enable = 1; - else if (!strncmp(buf, disabled, sizeof disabled - 1)) + else if (mode == THERMAL_DEVICE_DISABLED) enable = 0; else return -EINVAL; @@ -1013,7 +646,7 @@ static int thermal_set_mode(struct thermal_zone_device *thermal, } static int thermal_get_trip_type(struct thermal_zone_device *thermal, - int trip, char *buf) + int trip, enum thermal_trip_type *type) { struct acpi_thermal *tz = thermal->devdata; int i; @@ -1022,27 +655,35 @@ static int thermal_get_trip_type(struct thermal_zone_device *thermal, return -EINVAL; if (tz->trips.critical.flags.valid) { - if (!trip) - return sprintf(buf, "critical\n"); + if (!trip) { + *type = THERMAL_TRIP_CRITICAL; + return 0; + } trip--; } if (tz->trips.hot.flags.valid) { - if (!trip) - return sprintf(buf, "hot\n"); + if (!trip) { + *type = THERMAL_TRIP_HOT; + return 0; + } trip--; } if (tz->trips.passive.flags.valid) { - if (!trip) - return sprintf(buf, "passive\n"); + if (!trip) { + *type = THERMAL_TRIP_PASSIVE; + return 0; + } 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); + if (!trip) { + *type = THERMAL_TRIP_ACTIVE; + return 0; + } trip--; } @@ -1050,7 +691,7 @@ static int thermal_get_trip_type(struct thermal_zone_device *thermal, } static int thermal_get_trip_temp(struct thermal_zone_device *thermal, - int trip, char *buf) + int trip, unsigned long *temp) { struct acpi_thermal *tz = thermal->devdata; int i; @@ -1059,31 +700,39 @@ static int thermal_get_trip_temp(struct thermal_zone_device *thermal, return -EINVAL; if (tz->trips.critical.flags.valid) { - if (!trip) - return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS( - tz->trips.critical.temperature)); + if (!trip) { + *temp = KELVIN_TO_MILLICELSIUS( + tz->trips.critical.temperature); + return 0; + } trip--; } if (tz->trips.hot.flags.valid) { - if (!trip) - return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS( - tz->trips.hot.temperature)); + if (!trip) { + *temp = KELVIN_TO_MILLICELSIUS( + tz->trips.hot.temperature); + return 0; + } trip--; } if (tz->trips.passive.flags.valid) { - if (!trip) - return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS( - tz->trips.passive.temperature)); + if (!trip) { + *temp = KELVIN_TO_MILLICELSIUS( + tz->trips.passive.temperature); + return 0; + } 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)); + if (!trip) { + *temp = KELVIN_TO_MILLICELSIUS( + tz->trips.active[i].temperature); + return 0; + } trip--; } @@ -1102,6 +751,29 @@ static int thermal_get_crit_temp(struct thermal_zone_device *thermal, return -EINVAL; } +static int thermal_notify(struct thermal_zone_device *thermal, int trip, + enum thermal_trip_type trip_type) +{ + u8 type = 0; + struct acpi_thermal *tz = thermal->devdata; + + if (trip_type == THERMAL_TRIP_CRITICAL) + type = ACPI_THERMAL_NOTIFY_CRITICAL; + else if (trip_type == THERMAL_TRIP_HOT) + type = ACPI_THERMAL_NOTIFY_HOT; + else + return 0; + + acpi_bus_generate_proc_event(tz->device, type, 1); + acpi_bus_generate_netlink_event(tz->device->pnp.device_class, + dev_name(&tz->device->dev), type, 1); + + if (trip_type == THERMAL_TRIP_CRITICAL && nocrt) + return 1; + + return 0; +} + typedef int (*cb)(struct thermal_zone_device *, int, struct thermal_cooling_device *); static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, @@ -1194,6 +866,7 @@ static struct thermal_zone_device_ops acpi_thermal_zone_ops = { .get_trip_type = thermal_get_trip_type, .get_trip_temp = thermal_get_trip_temp, .get_crit_temp = thermal_get_crit_temp, + .notify = thermal_notify, }; static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) @@ -1214,8 +887,21 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) 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 (tz->trips.passive.flags.valid) + tz->thermal_zone = + thermal_zone_device_register("acpitz", trips, tz, + &acpi_thermal_zone_ops, + tz->trips.passive.tc1, + tz->trips.passive.tc2, + tz->trips.passive.tsp*100, + tz->polling_frequency*100); + else + tz->thermal_zone = + thermal_zone_device_register("acpitz", trips, tz, + &acpi_thermal_zone_ops, + 0, 0, 0, + tz->polling_frequency); if (IS_ERR(tz->thermal_zone)) return -ENODEV; @@ -1447,13 +1133,13 @@ static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) if (!tz) goto end; - if (!tz->polling_frequency) { + if (!tz->thermal_zone->polling_delay) { seq_puts(seq, "<polling disabled>\n"); goto end; } - seq_printf(seq, "polling frequency: %lu seconds\n", - (tz->polling_frequency / 10)); + seq_printf(seq, "polling frequency: %d seconds\n", + (tz->thermal_zone->polling_delay / 1000)); end: return 0; @@ -1683,12 +1369,6 @@ static int acpi_thermal_add(struct acpi_device *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); @@ -1717,36 +1397,15 @@ 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); |