X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Facpi%2Fthermal.c;h=9073ada888354ac7cff6f0b8d38803495b5f763d;hb=093e2961fea5b3b1075dce5b0112c676206988da;hp=44fffe16767e82136ba1b23c5792d7c7d86751f8;hpb=a6fc67202e0224e6c9d1d285cc0b444bce887ed5;p=safe%2Fjmp%2Flinux-2.6 diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c index 44fffe1..9073ada 100644 --- a/drivers/acpi/thermal.c +++ b/drivers/acpi/thermal.c @@ -33,20 +33,23 @@ #include #include +#include #include #include #include -#include +#include #include #include +#include +#include #include - +#include #include #include -#define ACPI_THERMAL_COMPONENT 0x04000000 +#define PREFIX "ACPI: " + #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" @@ -59,36 +62,48 @@ #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") +ACPI_MODULE_NAME("thermal"); MODULE_AUTHOR("Paul Diefenbaugh"); -MODULE_DESCRIPTION(ACPI_THERMAL_DRIVER_NAME); +MODULE_DESCRIPTION("ACPI Thermal Zone Driver"); MODULE_LICENSE("GPL"); +static int act; +module_param(act, int, 0644); +MODULE_PARM_DESC(act, "Disable or override all lowest active trip points."); + +static int crt; +module_param(crt, int, 0644); +MODULE_PARM_DESC(crt, "Disable or lower all critical trip points."); + static int tzp; -module_param(tzp, int, 0); -MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n"); +module_param(tzp, int, 0444); +MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds."); + +static int nocrt; +module_param(nocrt, int, 0); +MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points."); + +static int off; +module_param(off, int, 0); +MODULE_PARM_DESC(off, "Set to disable ACPI thermal support."); + +static int psv; +module_param(psv, int, 0644); +MODULE_PARM_DESC(psv, "Disable or override all passive trip points."); static int acpi_thermal_add(struct acpi_device *device); static int acpi_thermal_remove(struct acpi_device *device, int type); -static int acpi_thermal_resume(struct acpi_device *device, int state); +static int acpi_thermal_resume(struct acpi_device *device); +static void acpi_thermal_notify(struct acpi_device *device, u32 event); 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, @@ -97,14 +112,21 @@ 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 const struct acpi_device_id thermal_device_ids[] = { + {ACPI_THERMAL_HID, 0}, + {"", 0}, +}; +MODULE_DEVICE_TABLE(acpi, thermal_device_ids); + static struct acpi_driver acpi_thermal_driver = { - .name = ACPI_THERMAL_DRIVER_NAME, + .name = "thermal", .class = ACPI_THERMAL_CLASS, - .ids = ACPI_THERMAL_HID, + .ids = thermal_device_ids, .ops = { .add = acpi_thermal_add, .remove = acpi_thermal_remove, .resume = acpi_thermal_resume, + .notify = acpi_thermal_notify, }, }; @@ -162,43 +184,48 @@ struct acpi_thermal_flags { }; struct acpi_thermal { - acpi_handle handle; + struct acpi_device * device; 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; + struct thermal_zone_device *thermal_zone; + int tz_enabled; + int kelvin_offset; + struct mutex lock; }; -static struct file_operations acpi_thermal_state_fops = { +static const struct file_operations acpi_thermal_state_fops = { + .owner = THIS_MODULE, .open = acpi_thermal_state_open_fs, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; -static struct file_operations acpi_thermal_temp_fops = { +static const struct file_operations acpi_thermal_temp_fops = { + .owner = THIS_MODULE, .open = acpi_thermal_temp_open_fs, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; -static struct file_operations acpi_thermal_trip_fops = { +static const struct file_operations acpi_thermal_trip_fops = { + .owner = THIS_MODULE, .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 = { +static const struct file_operations acpi_thermal_cooling_fops = { + .owner = THIS_MODULE, .open = acpi_thermal_cooling_open_fs, .read = seq_read, .write = acpi_thermal_write_cooling_mode, @@ -206,7 +233,8 @@ static struct file_operations acpi_thermal_cooling_fops = { .release = single_release, }; -static struct file_operations acpi_thermal_polling_fops = { +static const struct file_operations acpi_thermal_polling_fops = { + .owner = THIS_MODULE, .open = acpi_thermal_polling_open_fs, .read = seq_read, .write = acpi_thermal_write_polling, @@ -221,60 +249,61 @@ static struct file_operations acpi_thermal_polling_fops = { static int acpi_thermal_get_temperature(struct acpi_thermal *tz) { acpi_status status = AE_OK; - - ACPI_FUNCTION_TRACE("acpi_thermal_get_temperature"); + unsigned long long tmp; if (!tz) - return_VALUE(-EINVAL); + return -EINVAL; tz->last_temperature = tz->temperature; - status = - acpi_evaluate_integer(tz->handle, "_TMP", NULL, &tz->temperature); + status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp); if (ACPI_FAILURE(status)) - return_VALUE(-ENODEV); + return -ENODEV; + tz->temperature = tmp; ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", tz->temperature)); - return_VALUE(0); + return 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"); + unsigned long long tmp; if (!tz) - return_VALUE(-EINVAL); + return -EINVAL; - status = - acpi_evaluate_integer(tz->handle, "_TZP", NULL, - &tz->polling_frequency); + status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp); if (ACPI_FAILURE(status)) - return_VALUE(-ENODEV); + return -ENODEV; + tz->polling_frequency = tmp; ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", tz->polling_frequency)); - return_VALUE(0); + return 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); + return -EINVAL; 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)); + tz->polling_frequency/10)); - return_VALUE(0); + return 0; } static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) @@ -284,520 +313,644 @@ static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) 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); + return -EINVAL; - status = acpi_get_handle(tz->handle, "_SCP", &handle); + status = acpi_get_handle(tz->device->handle, "_SCP", &handle); if (ACPI_FAILURE(status)) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); - return_VALUE(-ENODEV); + return -ENODEV; } arg0.integer.value = mode; status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); if (ACPI_FAILURE(status)) - return_VALUE(-ENODEV); + return -ENODEV; - tz->cooling_mode = mode; + return 0; +} - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Cooling mode [%s]\n", - mode ? "passive" : "active")); +#define ACPI_TRIPS_CRITICAL 0x01 +#define ACPI_TRIPS_HOT 0x02 +#define ACPI_TRIPS_PASSIVE 0x04 +#define ACPI_TRIPS_ACTIVE 0x08 +#define ACPI_TRIPS_DEVICES 0x10 - return_VALUE(0); -} +#define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE) +#define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES -static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) +#define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \ + ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \ + ACPI_TRIPS_DEVICES) + +/* + * This exception is thrown out in two cases: + * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid + * when re-evaluating the AML code. + * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change. + * We need to re-bind the cooling devices of a thermal zone when this occurs. + */ +#define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \ +do { \ + if (flags != ACPI_TRIPS_INIT) \ + ACPI_EXCEPTION((AE_INFO, AE_ERROR, \ + "ACPI thermal trip point %s changed\n" \ + "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \ +} while (0) + +static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) { acpi_status status = AE_OK; - int i = 0; - - ACPI_FUNCTION_TRACE("acpi_thermal_get_trip_points"); - - if (!tz) - return_VALUE(-EINVAL); + unsigned long long tmp; + struct acpi_handle_list devices; + int valid = 0; + int i; /* 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_EXCEPTION((AE_INFO, status, "No critical threshold")); - 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)); + if (flag & ACPI_TRIPS_CRITICAL) { + status = acpi_evaluate_integer(tz->device->handle, + "_CRT", NULL, &tmp); + tz->trips.critical.temperature = tmp; + /* + * Treat freezing temperatures as invalid as well; some + * BIOSes return really low values and cause reboots at startup. + * Below zero (Celsius) values clearly aren't right for sure.. + * ... so lets discard those as invalid. + */ + if (ACPI_FAILURE(status) || + tz->trips.critical.temperature <= 2732) { + tz->trips.critical.flags.valid = 0; + ACPI_EXCEPTION((AE_INFO, status, + "No or invalid critical threshold")); + return -ENODEV; + } else { + tz->trips.critical.flags.valid = 1; + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Found critical threshold [%lu]\n", + tz->trips.critical.temperature)); + } + if (tz->trips.critical.flags.valid == 1) { + if (crt == -1) { + tz->trips.critical.flags.valid = 0; + } else if (crt > 0) { + unsigned long crt_k = CELSIUS_TO_KELVIN(crt); + /* + * Allow override critical threshold + */ + if (crt_k > tz->trips.critical.temperature) + printk(KERN_WARNING PREFIX + "Critical threshold %d C\n", crt); + tz->trips.critical.temperature = crt_k; + } + } } /* 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)); + if (flag & ACPI_TRIPS_HOT) { + status = acpi_evaluate_integer(tz->device->handle, + "_HOT", NULL, &tmp); + if (ACPI_FAILURE(status)) { + tz->trips.hot.flags.valid = 0; + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "No hot threshold\n")); + } else { + tz->trips.hot.temperature = tmp; + tz->trips.hot.flags.valid = 1; + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Found hot threshold [%lu]\n", + tz->trips.critical.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; + /* Passive (optional) */ + if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) || + (flag == ACPI_TRIPS_INIT)) { + valid = tz->trips.passive.flags.valid; + if (psv == -1) { + status = AE_SUPPORT; + } else if (psv > 0) { + tmp = CELSIUS_TO_KELVIN(psv); + status = AE_OK; + } else { + status = acpi_evaluate_integer(tz->device->handle, + "_PSV", NULL, &tmp); + } - 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)) + else { + tz->trips.passive.temperature = tmp; + tz->trips.passive.flags.valid = 1; + if (flag == ACPI_TRIPS_INIT) { + status = acpi_evaluate_integer( + tz->device->handle, "_TC1", + NULL, &tmp); + if (ACPI_FAILURE(status)) + tz->trips.passive.flags.valid = 0; + else + tz->trips.passive.tc1 = tmp; + status = acpi_evaluate_integer( + tz->device->handle, "_TC2", + NULL, &tmp); + if (ACPI_FAILURE(status)) + tz->trips.passive.flags.valid = 0; + else + tz->trips.passive.tc2 = tmp; + status = acpi_evaluate_integer( + tz->device->handle, "_TSP", + NULL, &tmp); + if (ACPI_FAILURE(status)) + tz->trips.passive.flags.valid = 0; + else + tz->trips.passive.tsp = tmp; + } + } + } + if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) { + memset(&devices, 0, sizeof(struct acpi_handle_list)); + status = acpi_evaluate_reference(tz->device->handle, "_PSL", + NULL, &devices); + if (ACPI_FAILURE(status)) { + printk(KERN_WARNING PREFIX + "Invalid passive threshold\n"); tz->trips.passive.flags.valid = 0; - - if (!tz->trips.passive.flags.valid) - ACPI_WARNING((AE_INFO, "Invalid passive threshold")); + } else - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Found passive threshold [%lu]\n", - tz->trips.passive.temperature)); - } + tz->trips.passive.flags.valid = 1; - /* Active: Fans, etc. (optional) */ + if (memcmp(&tz->trips.passive.devices, &devices, + sizeof(struct acpi_handle_list))) { + memcpy(&tz->trips.passive.devices, &devices, + sizeof(struct acpi_handle_list)); + ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); + } + } + if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) { + if (valid != tz->trips.passive.flags.valid) + ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); + } + /* Active (optional) */ for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { - char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; + valid = tz->trips.active[i].flags.valid; + + if (act == -1) + break; /* disable all active trip points */ + + if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) && + tz->trips.active[i].flags.valid)) { + status = acpi_evaluate_integer(tz->device->handle, + name, NULL, &tmp); + if (ACPI_FAILURE(status)) { + tz->trips.active[i].flags.valid = 0; + if (i == 0) + break; + if (act <= 0) + break; + if (i == 1) + tz->trips.active[0].temperature = + CELSIUS_TO_KELVIN(act); + else + /* + * Don't allow override higher than + * the next higher trip point + */ + tz->trips.active[i - 1].temperature = + (tz->trips.active[i - 2].temperature < + CELSIUS_TO_KELVIN(act) ? + tz->trips.active[i - 2].temperature : + CELSIUS_TO_KELVIN(act)); + break; + } else { + tz->trips.active[i].temperature = tmp; + tz->trips.active[i].flags.valid = 1; + } + } - status = - acpi_evaluate_integer(tz->handle, name, NULL, - &tz->trips.active[i].temperature); - if (ACPI_FAILURE(status)) + name[2] = 'L'; + if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) { + memset(&devices, 0, sizeof(struct acpi_handle_list)); + status = acpi_evaluate_reference(tz->device->handle, + name, NULL, &devices); + if (ACPI_FAILURE(status)) { + printk(KERN_WARNING PREFIX + "Invalid active%d threshold\n", i); + tz->trips.active[i].flags.valid = 0; + } + else + tz->trips.active[i].flags.valid = 1; + + if (memcmp(&tz->trips.active[i].devices, &devices, + sizeof(struct acpi_handle_list))) { + memcpy(&tz->trips.active[i].devices, &devices, + sizeof(struct acpi_handle_list)); + ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); + } + } + if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES)) + if (valid != tz->trips.active[i].flags.valid) + ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); + + if (!tz->trips.active[i].flags.valid) break; + } - 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_EXCEPTION((AE_INFO, status, - "Invalid active threshold [%d]", i)); + if (flag & ACPI_TRIPS_DEVICES) { + memset(&devices, 0, sizeof(struct acpi_handle_list)); + status = acpi_evaluate_reference(tz->device->handle, "_TZD", + NULL, &devices); + if (memcmp(&tz->devices, &devices, + sizeof(struct acpi_handle_list))) { + memcpy(&tz->devices, &devices, + sizeof(struct acpi_handle_list)); + ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); + } } - return_VALUE(0); + return 0; } -static int acpi_thermal_get_devices(struct acpi_thermal *tz) +static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) { - acpi_status status = AE_OK; + return acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); +} + +static void acpi_thermal_check(void *data) +{ + struct acpi_thermal *tz = data; + + thermal_zone_device_update(tz->thermal_zone); +} - ACPI_FUNCTION_TRACE("acpi_thermal_get_devices"); +/* sys I/F for generic thermal sysfs support */ +#define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100) + +static int thermal_get_temp(struct thermal_zone_device *thermal, + unsigned long *temp) +{ + struct acpi_thermal *tz = thermal->devdata; + int result; if (!tz) - return_VALUE(-EINVAL); + return -EINVAL; - status = - acpi_evaluate_reference(tz->handle, "_TZD", NULL, &tz->devices); - if (ACPI_FAILURE(status)) - return_VALUE(-ENODEV); + result = acpi_thermal_get_temperature(tz); + if (result) + return result; - return_VALUE(0); + *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset); + return 0; } -static int acpi_thermal_call_usermode(char *path) +static const char enabled[] = "kernel"; +static const char disabled[] = "user"; +static int thermal_get_mode(struct thermal_zone_device *thermal, + enum thermal_device_mode *mode) { - char *argv[2] = { NULL, NULL }; - char *envp[3] = { NULL, NULL, NULL }; + struct acpi_thermal *tz = thermal->devdata; - ACPI_FUNCTION_TRACE("acpi_thermal_call_usermode"); + if (!tz) + return -EINVAL; - if (!path) - return_VALUE(-EINVAL); + *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED : + THERMAL_DEVICE_DISABLED; - argv[0] = path; + return 0; +} - /* minimal command environment */ - envp[0] = "HOME=/"; - envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; +static int thermal_set_mode(struct thermal_zone_device *thermal, + enum thermal_device_mode mode) +{ + struct acpi_thermal *tz = thermal->devdata; + int enable; + + if (!tz) + return -EINVAL; - call_usermodehelper(argv[0], argv, envp, 0); + /* + * enable/disable thermal management from ACPI thermal driver + */ + if (mode == THERMAL_DEVICE_ENABLED) + enable = 1; + else if (mode == THERMAL_DEVICE_DISABLED) + enable = 0; + else + return -EINVAL; - return_VALUE(0); + if (enable != tz->tz_enabled) { + tz->tz_enabled = enable; + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "%s ACPI thermal control\n", + tz->tz_enabled ? enabled : disabled)); + acpi_thermal_check(tz); + } + return 0; } -static int acpi_thermal_critical(struct acpi_thermal *tz) +static int thermal_get_trip_type(struct thermal_zone_device *thermal, + int trip, enum thermal_trip_type *type) { - int result = 0; - struct acpi_device *device = NULL; - - ACPI_FUNCTION_TRACE("acpi_thermal_critical"); + struct acpi_thermal *tz = thermal->devdata; + int i; - if (!tz || !tz->trips.critical.flags.valid) - return_VALUE(-EINVAL); + if (!tz || trip < 0) + return -EINVAL; - if (tz->temperature >= tz->trips.critical.temperature) { - ACPI_WARNING((AE_INFO, "Critical trip point")); - tz->trips.critical.flags.enabled = 1; - } else if (tz->trips.critical.flags.enabled) - tz->trips.critical.flags.enabled = 0; + if (tz->trips.critical.flags.valid) { + if (!trip) { + *type = THERMAL_TRIP_CRITICAL; + return 0; + } + trip--; + } - result = acpi_bus_get_device(tz->handle, &device); - if (result) - return_VALUE(result); + if (tz->trips.hot.flags.valid) { + if (!trip) { + *type = THERMAL_TRIP_HOT; + return 0; + } + trip--; + } - 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); + if (tz->trips.passive.flags.valid) { + if (!trip) { + *type = THERMAL_TRIP_PASSIVE; + return 0; + } + trip--; + } - acpi_thermal_call_usermode(ACPI_THERMAL_PATH_POWEROFF); + for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && + tz->trips.active[i].flags.valid; i++) { + if (!trip) { + *type = THERMAL_TRIP_ACTIVE; + return 0; + } + trip--; + } - return_VALUE(0); + return -EINVAL; } -static int acpi_thermal_hot(struct acpi_thermal *tz) +static int thermal_get_trip_temp(struct thermal_zone_device *thermal, + int trip, unsigned long *temp) { - int result = 0; - struct acpi_device *device = NULL; - - ACPI_FUNCTION_TRACE("acpi_thermal_hot"); - - if (!tz || !tz->trips.hot.flags.valid) - return_VALUE(-EINVAL); + struct acpi_thermal *tz = thermal->devdata; + int i; + + if (!tz || trip < 0) + return -EINVAL; + + if (tz->trips.critical.flags.valid) { + if (!trip) { + *temp = KELVIN_TO_MILLICELSIUS( + tz->trips.critical.temperature, + tz->kelvin_offset); + return 0; + } + trip--; + } - if (tz->temperature >= tz->trips.hot.temperature) { - ACPI_WARNING((AE_INFO, "Hot trip point")); - tz->trips.hot.flags.enabled = 1; - } else if (tz->trips.hot.flags.enabled) - tz->trips.hot.flags.enabled = 0; + if (tz->trips.hot.flags.valid) { + if (!trip) { + *temp = KELVIN_TO_MILLICELSIUS( + tz->trips.hot.temperature, + tz->kelvin_offset); + return 0; + } + trip--; + } - result = acpi_bus_get_device(tz->handle, &device); - if (result) - return_VALUE(result); + if (tz->trips.passive.flags.valid) { + if (!trip) { + *temp = KELVIN_TO_MILLICELSIUS( + tz->trips.passive.temperature, + tz->kelvin_offset); + return 0; + } + trip--; + } - acpi_bus_generate_event(device, ACPI_THERMAL_NOTIFY_HOT, - tz->trips.hot.flags.enabled); + for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && + tz->trips.active[i].flags.valid; i++) { + if (!trip) { + *temp = KELVIN_TO_MILLICELSIUS( + tz->trips.active[i].temperature, + tz->kelvin_offset); + return 0; + } + trip--; + } - /* TBD: Call user-mode "sleep(S4)" function */ + return -EINVAL; +} - return_VALUE(0); +static int thermal_get_crit_temp(struct thermal_zone_device *thermal, + unsigned long *temperature) { + struct acpi_thermal *tz = thermal->devdata; + + if (tz->trips.critical.flags.valid) { + *temperature = KELVIN_TO_MILLICELSIUS( + tz->trips.critical.temperature, + tz->kelvin_offset); + return 0; + } else + return -EINVAL; } -static void acpi_thermal_passive(struct acpi_thermal *tz) +static int thermal_notify(struct thermal_zone_device *thermal, int trip, + enum thermal_trip_type trip_type) { - int result = 1; - struct acpi_thermal_passive *passive = NULL; - int trend = 0; - int i = 0; - - ACPI_FUNCTION_TRACE("acpi_thermal_passive"); + u8 type = 0; + struct acpi_thermal *tz = thermal->devdata; - if (!tz || !tz->trips.passive.flags.valid) - return; + 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; - passive = &(tz->trips.passive); + 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); - /* - * 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; - } + if (trip_type == THERMAL_TRIP_CRITICAL && nocrt) + return 1; - /* - * 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")); - } + return 0; } -static void acpi_thermal_active(struct acpi_thermal *tz) +typedef int (*cb)(struct thermal_zone_device *, int, + struct thermal_cooling_device *); +static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, + struct thermal_cooling_device *cdev, + cb action) { + struct acpi_device *device = cdev->devdata; + struct acpi_thermal *tz = thermal->devdata; + struct acpi_device *dev; + acpi_status status; + acpi_handle handle; + int i; + int j; + int trip = -1; int result = 0; - struct acpi_thermal_active *active = NULL; - int i = 0; - int j = 0; - unsigned long maxtemp = 0; - ACPI_FUNCTION_TRACE("acpi_thermal_active"); + if (tz->trips.critical.flags.valid) + trip++; - if (!tz) - return; + if (tz->trips.hot.flags.valid) + trip++; + + if (tz->trips.passive.flags.valid) { + trip++; + for (i = 0; i < tz->trips.passive.devices.count; + i++) { + handle = tz->trips.passive.devices.handles[i]; + status = acpi_bus_get_device(handle, &dev); + if (ACPI_SUCCESS(status) && (dev == device)) { + result = action(thermal, trip, cdev); + if (result) + goto failed; + } + } + } for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { - active = &(tz->trips.active[i]); - if (!active || !active->flags.valid) + if (!tz->trips.active[i].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_WARNING((AE_INFO, - "Unable to turn cooling device [%p] 'on'", - 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])); + trip++; + for (j = 0; + j < tz->trips.active[i].devices.count; + j++) { + handle = tz->trips.active[i].devices.handles[j]; + status = acpi_bus_get_device(handle, &dev); + if (ACPI_SUCCESS(status) && (dev == device)) { + result = action(thermal, trip, cdev); + if (result) + goto failed; } - 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_WARNING((AE_INFO, - "Unable to turn cooling device [%p] 'off'", - 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])); + } + + for (i = 0; i < tz->devices.count; i++) { + handle = tz->devices.handles[i]; + status = acpi_bus_get_device(handle, &dev); + if (ACPI_SUCCESS(status) && (dev == device)) { + result = action(thermal, -1, cdev); + if (result) + goto failed; } } -} -static void acpi_thermal_check(void *context); +failed: + return result; +} -static void acpi_thermal_run(unsigned long data) +static int +acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, + struct thermal_cooling_device *cdev) { - struct acpi_thermal *tz = (struct acpi_thermal *)data; - if (!tz->zombie) - acpi_os_execute(OSL_GPE_HANDLER, acpi_thermal_check, (void *)data); + return acpi_thermal_cooling_device_cb(thermal, cdev, + thermal_zone_bind_cooling_device); } -static void acpi_thermal_check(void *data) +static int +acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, + struct thermal_cooling_device *cdev) { - 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_ERROR((AE_INFO, "Invalid (NULL) context")); - return_VOID; - } - - state = tz->state; + return acpi_thermal_cooling_device_cb(thermal, cdev, + thermal_zone_unbind_cooling_device); +} - result = acpi_thermal_get_temperature(tz); - if (result) - return_VOID; +static struct thermal_zone_device_ops acpi_thermal_zone_ops = { + .bind = acpi_thermal_bind_cooling_device, + .unbind = acpi_thermal_unbind_cooling_device, + .get_temp = thermal_get_temp, + .get_mode = thermal_get_mode, + .set_mode = thermal_set_mode, + .get_trip_type = thermal_get_trip_type, + .get_trip_temp = thermal_get_trip_temp, + .get_crit_temp = thermal_get_crit_temp, + .notify = thermal_notify, +}; - memset(&tz->state, 0, sizeof(tz->state)); +static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) +{ + int trips = 0; + int result; + acpi_status status; + int i; - /* - * 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); + trips++; + 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); + trips++; - /* - * 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); + if (tz->trips.passive.flags.valid) + trips++; - /* - * 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; + for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && + tz->trips.active[i].flags.valid; i++, trips++); - /* - * 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; + 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*100); + if (IS_ERR(tz->thermal_zone)) + return -ENODEV; + + result = sysfs_create_link(&tz->device->dev.kobj, + &tz->thermal_zone->device.kobj, "thermal_zone"); + if (result) + return result; - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n", - tz->name, tz->temperature, sleep_time)); + result = sysfs_create_link(&tz->thermal_zone->device.kobj, + &tz->device->dev.kobj, "device"); + if (result) + return result; - /* - * 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)); - } + status = acpi_attach_data(tz->device->handle, + acpi_bus_private_data_handler, + tz->thermal_zone); + if (ACPI_FAILURE(status)) { + printk(KERN_ERR PREFIX + "Error attaching device data\n"); + return -ENODEV; } - return_VOID; + tz->tz_enabled = 1; + + dev_info(&tz->device->dev, "registered as thermal_zone%d\n", + tz->thermal_zone->id); + return 0; +} + +static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz) +{ + sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); + sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); + thermal_zone_device_unregister(tz->thermal_zone); + tz->thermal_zone = NULL; + acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler); } + /* -------------------------------------------------------------------------- FS Interface (/proc) -------------------------------------------------------------------------- */ @@ -806,9 +959,8 @@ 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; + struct acpi_thermal *tz = seq->private; - ACPI_FUNCTION_TRACE("acpi_thermal_state_seq_show"); if (!tz) goto end; @@ -831,7 +983,7 @@ static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset) } end: - return_VALUE(0); + return 0; } static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file) @@ -842,9 +994,8 @@ static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file) 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; + struct acpi_thermal *tz = seq->private; - ACPI_FUNCTION_TRACE("acpi_thermal_temp_seq_show"); if (!tz) goto end; @@ -857,7 +1008,7 @@ static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset) KELVIN_TO_CELSIUS(tz->temperature)); end: - return_VALUE(0); + return 0; } static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file) @@ -867,22 +1018,26 @@ static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file) static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) { - struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; + struct acpi_thermal *tz = seq->private; + struct acpi_device *device; + acpi_status status; + 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)); + seq_printf(seq, "critical (S5): %ld C%s", + KELVIN_TO_CELSIUS(tz->trips.critical.temperature), + nocrt ? " \n" : "\n"); if (tz->trips.hot.flags.valid) - seq_printf(seq, "hot (S4): %ld C\n", - KELVIN_TO_CELSIUS(tz->trips.hot.temperature)); + seq_printf(seq, "hot (S4): %ld C%s", + KELVIN_TO_CELSIUS(tz->trips.hot.temperature), + nocrt ? " \n" : "\n"); if (tz->trips.passive.flags.valid) { seq_printf(seq, @@ -891,11 +1046,19 @@ static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) 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]); + status = acpi_bus_get_device(tz->trips.passive.devices. + handles[j], &device); + seq_printf(seq, "%4.4s ", status ? "" : + acpi_device_bid(device)); } seq_puts(seq, "\n"); + } else { + seq_printf(seq, "passive (forced):"); + if (tz->thermal_zone->forced_passive) + seq_printf(seq, " %i C\n", + tz->thermal_zone->forced_passive / 1000); + else + seq_printf(seq, "\n"); } for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { @@ -904,14 +1067,18 @@ static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) 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]); + for (j = 0; j < tz->trips.active[i].devices.count; j++){ + status = acpi_bus_get_device(tz->trips.active[i]. + devices.handles[j], + &device); + seq_printf(seq, "%4.4s ", status ? "" : + acpi_device_bid(device)); + } seq_puts(seq, "\n"); } end: - return_VALUE(0); + return 0; } static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file) @@ -919,91 +1086,21 @@ 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) { - kfree(limit_string); - return_VALUE(-ENOMEM); - } - - if (!tz || (count > ACPI_THERMAL_MAX_LIMIT_STR_LEN - 1)) { - count = -EINVAL; - goto end; - } - - if (copy_from_user(limit_string, buffer, count)) { - 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))) { - 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; + struct acpi_thermal *tz = seq->private; - ACPI_FUNCTION_TRACE("acpi_thermal_cooling_seq_show"); if (!tz) goto end; - if (!tz->flags.cooling_mode) { + 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"); + seq_puts(seq, "0 - Active; 1 - Passive\n"); end: - return_VALUE(0); + return 0; } static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file) @@ -1017,21 +1114,20 @@ 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; + struct seq_file *m = file->private_data; + struct acpi_thermal *tz = 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); + return -EINVAL; if (!tz->flags.cooling_mode) - return_VALUE(-ENODEV); + return -ENODEV; if (copy_from_user(mode_string, buffer, count)) - return_VALUE(-EFAULT); + return -EFAULT; mode_string[count] = '\0'; @@ -1039,32 +1135,31 @@ acpi_thermal_write_cooling_mode(struct file *file, simple_strtoul(mode_string, NULL, 0)); if (result) - return_VALUE(result); + return result; acpi_thermal_check(tz); - return_VALUE(count); + return count; } static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) { - struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; + struct acpi_thermal *tz = seq->private; - ACPI_FUNCTION_TRACE("acpi_thermal_polling_seq_show"); if (!tz) goto end; - if (!tz->polling_frequency) { + if (!tz->thermal_zone->polling_delay) { seq_puts(seq, "\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_VALUE(0); + return 0; } static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file) @@ -1078,19 +1173,18 @@ 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; + struct seq_file *m = file->private_data; + struct acpi_thermal *tz = 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); + return -EINVAL; if (copy_from_user(polling_string, buffer, count)) - return_VALUE(-EFAULT); + return -EFAULT; polling_string[count] = '\0'; @@ -1098,91 +1192,72 @@ acpi_thermal_write_polling(struct file *file, result = acpi_thermal_set_polling(tz, seconds); if (result) - return_VALUE(result); + return result; acpi_thermal_check(tz); - return_VALUE(count); + return 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; + return -ENODEV; } /* 'state' [R] */ - entry = create_proc_entry(ACPI_THERMAL_FILE_STATE, - S_IRUGO, acpi_device_dir(device)); + entry = proc_create_data(ACPI_THERMAL_FILE_STATE, + S_IRUGO, acpi_device_dir(device), + &acpi_thermal_state_fops, + acpi_driver_data(device)); if (!entry) - return_VALUE(-ENODEV); - else { - entry->proc_fops = &acpi_thermal_state_fops; - entry->data = acpi_driver_data(device); - entry->owner = THIS_MODULE; - } + return -ENODEV; /* 'temperature' [R] */ - entry = create_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, - S_IRUGO, acpi_device_dir(device)); + entry = proc_create_data(ACPI_THERMAL_FILE_TEMPERATURE, + S_IRUGO, acpi_device_dir(device), + &acpi_thermal_temp_fops, + acpi_driver_data(device)); if (!entry) - return_VALUE(-ENODEV); - 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)); + return -ENODEV; + + /* 'trip_points' [R] */ + entry = proc_create_data(ACPI_THERMAL_FILE_TRIP_POINTS, + S_IRUGO, + acpi_device_dir(device), + &acpi_thermal_trip_fops, + acpi_driver_data(device)); if (!entry) - return_VALUE(-ENODEV); - else { - entry->proc_fops = &acpi_thermal_trip_fops; - entry->data = acpi_driver_data(device); - entry->owner = THIS_MODULE; - } + return -ENODEV; /* 'cooling_mode' [R/W] */ - entry = create_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, - S_IFREG | S_IRUGO | S_IWUSR, - acpi_device_dir(device)); + entry = proc_create_data(ACPI_THERMAL_FILE_COOLING_MODE, + S_IFREG | S_IRUGO | S_IWUSR, + acpi_device_dir(device), + &acpi_thermal_cooling_fops, + acpi_driver_data(device)); if (!entry) - return_VALUE(-ENODEV); - else { - entry->proc_fops = &acpi_thermal_cooling_fops; - entry->data = acpi_driver_data(device); - entry->owner = THIS_MODULE; - } + return -ENODEV; /* 'polling_frequency' [R/W] */ - entry = create_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, - S_IFREG | S_IRUGO | S_IWUSR, - acpi_device_dir(device)); + entry = proc_create_data(ACPI_THERMAL_FILE_POLLING_FREQ, + S_IFREG | S_IRUGO | S_IWUSR, + acpi_device_dir(device), + &acpi_thermal_polling_fops, + acpi_driver_data(device)); if (!entry) - return_VALUE(-ENODEV); - else { - entry->proc_fops = &acpi_thermal_polling_fops; - entry->data = acpi_driver_data(device); - entry->owner = THIS_MODULE; - } - - return_VALUE(0); + return -ENODEV; + return 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, @@ -1199,94 +1274,68 @@ static int acpi_thermal_remove_fs(struct acpi_device *device) acpi_device_dir(device) = NULL; } - return_VALUE(0); + return 0; } /* -------------------------------------------------------------------------- Driver Interface -------------------------------------------------------------------------- */ -static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data) +static void acpi_thermal_notify(struct acpi_device *device, u32 event) { - struct acpi_thermal *tz = (struct acpi_thermal *)data; - struct acpi_device *device = NULL; + struct acpi_thermal *tz = acpi_driver_data(device); - ACPI_FUNCTION_TRACE("acpi_thermal_notify"); if (!tz) - return_VOID; - - if (acpi_bus_get_device(tz->handle, &device)) - return_VOID; + return; 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_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS); acpi_thermal_check(tz); - acpi_bus_generate_event(device, event, 0); + acpi_bus_generate_proc_event(device, event, 0); + acpi_bus_generate_netlink_event(device->pnp.device_class, + dev_name(&device->dev), event, 0); break; case ACPI_THERMAL_NOTIFY_DEVICES: - if (tz->flags.devices) - acpi_thermal_get_devices(tz); - acpi_bus_generate_event(device, event, 0); + acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES); + acpi_thermal_check(tz); + acpi_bus_generate_proc_event(device, event, 0); + acpi_bus_generate_netlink_event(device->pnp.device_class, + dev_name(&device->dev), 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); + return -EINVAL; /* Get temperature [_TMP] (required) */ result = acpi_thermal_get_temperature(tz); if (result) - return_VALUE(result); + return result; /* Get trip points [_CRT, _PSV, etc.] (required) */ result = acpi_thermal_get_trip_points(tz); if (result) - return_VALUE(result); + return result; /* Set the cooling mode [_SCP] to active cooling (default) */ result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); if (!result) tz->flags.cooling_mode = 1; - 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) @@ -1294,154 +1343,231 @@ static int acpi_thermal_get_info(struct acpi_thermal *tz) 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 0; +} - return_VALUE(0); +/* + * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI + * handles temperature values with a single decimal place. As a consequence, + * some implementations use an offset of 273.1 and others use an offset of + * 273.2. Try to find out which one is being used, to present the most + * accurate and visually appealing number. + * + * The heuristic below should work for all ACPI thermal zones which have a + * critical trip point with a value being a multiple of 0.5 degree Celsius. + */ +static void acpi_thermal_guess_offset(struct acpi_thermal *tz) +{ + if (tz->trips.critical.flags.valid && + (tz->trips.critical.temperature % 5) == 1) + tz->kelvin_offset = 2731; + else + tz->kelvin_offset = 2732; } 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); + return -EINVAL; - tz = kmalloc(sizeof(struct acpi_thermal), GFP_KERNEL); + tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); if (!tz) - return_VALUE(-ENOMEM); - memset(tz, 0, sizeof(struct acpi_thermal)); + return -ENOMEM; - tz->handle = device->handle; + tz->device = device; strcpy(tz->name, device->pnp.bus_id); strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); - acpi_driver_data(device) = tz; + device->driver_data = tz; + mutex_init(&tz->lock); - result = acpi_thermal_get_info(tz); - if (result) - goto end; - result = acpi_thermal_add_fs(device); + result = acpi_thermal_get_info(tz); if (result) - goto end; + goto free_memory; - init_timer(&tz->timer); + acpi_thermal_guess_offset(tz); - acpi_thermal_check(tz); + result = acpi_thermal_register_thermal_zone(tz); + if (result) + goto free_memory; - status = acpi_install_notify_handler(tz->handle, - ACPI_DEVICE_NOTIFY, - acpi_thermal_notify, tz); - if (ACPI_FAILURE(status)) { - result = -ENODEV; - goto end; - } + result = acpi_thermal_add_fs(device); + if (result) + goto unregister_thermal_zone; printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", acpi_device_name(device), acpi_device_bid(device), KELVIN_TO_CELSIUS(tz->temperature)); + goto end; - end: - if (result) { - acpi_thermal_remove_fs(device); - kfree(tz); - } - - return_VALUE(result); +unregister_thermal_zone: + thermal_zone_device_unregister(tz->thermal_zone); +free_memory: + kfree(tz); +end: + return result; } static int acpi_thermal_remove(struct acpi_device *device, int type) { - acpi_status status = AE_OK; struct acpi_thermal *tz = NULL; - 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); - - /* 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); - } + return -EINVAL; - acpi_thermal_remove_fs(device); + tz = acpi_driver_data(device); + acpi_thermal_remove_fs(device); + acpi_thermal_unregister_thermal_zone(tz); + mutex_destroy(&tz->lock); kfree(tz); - return_VALUE(0); + return 0; } -static int acpi_thermal_resume(struct acpi_device *device, int state) +static int acpi_thermal_resume(struct acpi_device *device) { struct acpi_thermal *tz = NULL; + int i, j, power_state, result; + if (!device || !acpi_driver_data(device)) - return_VALUE(-EINVAL); + return -EINVAL; + + tz = acpi_driver_data(device); - tz = (struct acpi_thermal *)acpi_driver_data(device); + for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { + if (!(&tz->trips.active[i])) + break; + if (!tz->trips.active[i].flags.valid) + break; + tz->trips.active[i].flags.enabled = 1; + for (j = 0; j < tz->trips.active[i].devices.count; j++) { + result = acpi_bus_get_power(tz->trips.active[i].devices. + handles[j], &power_state); + if (result || (power_state != ACPI_STATE_D0)) { + tz->trips.active[i].flags.enabled = 0; + break; + } + } + tz->state.active |= tz->trips.active[i].flags.enabled; + } acpi_thermal_check(tz); return AE_OK; } +static int thermal_act(const struct dmi_system_id *d) { + + if (act == 0) { + printk(KERN_NOTICE "ACPI: %s detected: " + "disabling all active thermal trip points\n", d->ident); + act = -1; + } + return 0; +} +static int thermal_nocrt(const struct dmi_system_id *d) { + + printk(KERN_NOTICE "ACPI: %s detected: " + "disabling all critical thermal trip point actions.\n", d->ident); + nocrt = 1; + return 0; +} +static int thermal_tzp(const struct dmi_system_id *d) { + + if (tzp == 0) { + printk(KERN_NOTICE "ACPI: %s detected: " + "enabling thermal zone polling\n", d->ident); + tzp = 300; /* 300 dS = 30 Seconds */ + } + return 0; +} +static int thermal_psv(const struct dmi_system_id *d) { + + if (psv == 0) { + printk(KERN_NOTICE "ACPI: %s detected: " + "disabling all passive thermal trip points\n", d->ident); + psv = -1; + } + return 0; +} + +static struct dmi_system_id thermal_dmi_table[] __initdata = { + /* + * Award BIOS on this AOpen makes thermal control almost worthless. + * http://bugzilla.kernel.org/show_bug.cgi?id=8842 + */ + { + .callback = thermal_act, + .ident = "AOpen i915GMm-HFS", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), + DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), + }, + }, + { + .callback = thermal_psv, + .ident = "AOpen i915GMm-HFS", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), + DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), + }, + }, + { + .callback = thermal_tzp, + .ident = "AOpen i915GMm-HFS", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), + DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), + }, + }, + { + .callback = thermal_nocrt, + .ident = "Gigabyte GA-7ZX", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), + DMI_MATCH(DMI_BOARD_NAME, "7ZX"), + }, + }, + {} +}; + static int __init acpi_thermal_init(void) { int result = 0; - ACPI_FUNCTION_TRACE("acpi_thermal_init"); + dmi_check_system(thermal_dmi_table); + if (off) { + printk(KERN_NOTICE "ACPI: thermal control disabled\n"); + return -ENODEV; + } acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); if (!acpi_thermal_dir) - return_VALUE(-ENODEV); - acpi_thermal_dir->owner = THIS_MODULE; + return -ENODEV; result = acpi_bus_register_driver(&acpi_thermal_driver); if (result < 0) { remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); - return_VALUE(-ENODEV); + return -ENODEV; } - return_VALUE(0); + return 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; + return; } module_init(acpi_thermal_init);