diff options
Diffstat (limited to 'drivers/acpi/thermal.c')
-rw-r--r-- | drivers/acpi/thermal.c | 287 |
1 files changed, 121 insertions, 166 deletions
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c index 4720a3649a61..f9f6ebb08fdb 100644 --- a/drivers/acpi/thermal.c +++ b/drivers/acpi/thermal.c @@ -40,12 +40,35 @@ #define ACPI_THERMAL_NOTIFY_HOT 0xF1 #define ACPI_THERMAL_MODE_ACTIVE 0x00 -#define ACPI_THERMAL_MAX_ACTIVE 10 -#define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 +#define ACPI_THERMAL_MAX_ACTIVE 10 +#define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 -MODULE_AUTHOR("Paul Diefenbaugh"); -MODULE_DESCRIPTION("ACPI Thermal Zone Driver"); -MODULE_LICENSE("GPL"); +#define ACPI_TRIPS_CRITICAL BIT(0) +#define ACPI_TRIPS_HOT BIT(1) +#define ACPI_TRIPS_PASSIVE BIT(2) +#define ACPI_TRIPS_ACTIVE BIT(3) +#define ACPI_TRIPS_DEVICES BIT(4) + +#define ACPI_TRIPS_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE) + +#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, tz, str) \ +do { \ + if (flags != ACPI_TRIPS_INIT) \ + acpi_handle_info(tz->device->handle, \ + "ACPI thermal trip point %s changed\n" \ + "Please report to linux-acpi@vger.kernel.org\n", str); \ +} while (0) static int act; module_param(act, int, 0644); @@ -73,75 +96,30 @@ MODULE_PARM_DESC(psv, "Disable or override all passive trip points."); static struct workqueue_struct *acpi_thermal_pm_queue; -static int acpi_thermal_add(struct acpi_device *device); -static void acpi_thermal_remove(struct acpi_device *device); -static void acpi_thermal_notify(struct acpi_device *device, u32 event); - -static const struct acpi_device_id thermal_device_ids[] = { - {ACPI_THERMAL_HID, 0}, - {"", 0}, -}; -MODULE_DEVICE_TABLE(acpi, thermal_device_ids); - -#ifdef CONFIG_PM_SLEEP -static int acpi_thermal_suspend(struct device *dev); -static int acpi_thermal_resume(struct device *dev); -#else -#define acpi_thermal_suspend NULL -#define acpi_thermal_resume NULL -#endif -static SIMPLE_DEV_PM_OPS(acpi_thermal_pm, acpi_thermal_suspend, acpi_thermal_resume); - -static struct acpi_driver acpi_thermal_driver = { - .name = "thermal", - .class = ACPI_THERMAL_CLASS, - .ids = thermal_device_ids, - .ops = { - .add = acpi_thermal_add, - .remove = acpi_thermal_remove, - .notify = acpi_thermal_notify, - }, - .drv.pm = &acpi_thermal_pm, -}; - -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; + bool valid; }; struct acpi_thermal_hot { - struct acpi_thermal_state_flags flags; unsigned long temperature; + bool valid; }; struct acpi_thermal_passive { - struct acpi_thermal_state_flags flags; + struct acpi_handle_list devices; unsigned long temperature; unsigned long tc1; unsigned long tc2; unsigned long tsp; - struct acpi_handle_list devices; + bool valid; }; struct acpi_thermal_active { - struct acpi_thermal_state_flags flags; - unsigned long temperature; struct acpi_handle_list devices; + unsigned long temperature; + bool valid; + bool enabled; }; struct acpi_thermal_trips { @@ -151,12 +129,6 @@ struct acpi_thermal_trips { 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 { struct acpi_device *device; acpi_bus_id name; @@ -164,8 +136,6 @@ struct acpi_thermal { unsigned long last_temperature; unsigned long polling_frequency; volatile u8 zombie; - struct acpi_thermal_flags flags; - struct acpi_thermal_state state; struct acpi_thermal_trips trips; struct acpi_handle_list devices; struct thermal_zone_device *thermal_zone; @@ -220,52 +190,12 @@ static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) return 0; } -static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) -{ - if (!tz) - return -EINVAL; - - if (ACPI_FAILURE(acpi_execute_simple_method(tz->device->handle, - "_SCP", mode))) - return -ENODEV; - - return 0; -} - -#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 - -#define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE) -#define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES - -#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, tz, str) \ -do { \ - if (flags != ACPI_TRIPS_INIT) \ - acpi_handle_info(tz->device->handle, \ - "ACPI thermal trip point %s changed\n" \ - "Please report 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; unsigned long long tmp; struct acpi_handle_list devices; - int valid = 0; + bool valid = false; int i; /* Critical Shutdown */ @@ -279,21 +209,21 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) * ... so lets discard those as invalid. */ if (ACPI_FAILURE(status)) { - tz->trips.critical.flags.valid = 0; + tz->trips.critical.valid = false; acpi_handle_debug(tz->device->handle, "No critical threshold\n"); } else if (tmp <= 2732) { pr_info(FW_BUG "Invalid critical threshold (%llu)\n", tmp); - tz->trips.critical.flags.valid = 0; + tz->trips.critical.valid = false; } else { - tz->trips.critical.flags.valid = 1; + tz->trips.critical.valid = true; acpi_handle_debug(tz->device->handle, "Found critical threshold [%lu]\n", tz->trips.critical.temperature); } - if (tz->trips.critical.flags.valid) { + if (tz->trips.critical.valid) { if (crt == -1) { - tz->trips.critical.flags.valid = 0; + tz->trips.critical.valid = false; } else if (crt > 0) { unsigned long crt_k = celsius_to_deci_kelvin(crt); @@ -312,12 +242,12 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) 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; + tz->trips.hot.valid = false; acpi_handle_debug(tz->device->handle, "No hot threshold\n"); } else { tz->trips.hot.temperature = tmp; - tz->trips.hot.flags.valid = 1; + tz->trips.hot.valid = true; acpi_handle_debug(tz->device->handle, "Found hot threshold [%lu]\n", tz->trips.hot.temperature); @@ -325,9 +255,9 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) } /* Passive (optional) */ - if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) || + if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.valid) || flag == ACPI_TRIPS_INIT) { - valid = tz->trips.passive.flags.valid; + valid = tz->trips.passive.valid; if (psv == -1) { status = AE_SUPPORT; } else if (psv > 0) { @@ -339,44 +269,44 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) } if (ACPI_FAILURE(status)) { - tz->trips.passive.flags.valid = 0; + tz->trips.passive.valid = false; } else { tz->trips.passive.temperature = tmp; - tz->trips.passive.flags.valid = 1; + tz->trips.passive.valid = true; 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; + tz->trips.passive.valid = false; 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; + tz->trips.passive.valid = false; 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; + tz->trips.passive.valid = false; else tz->trips.passive.tsp = tmp; } } } - if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) { + if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.valid) { memset(&devices, 0, sizeof(struct acpi_handle_list)); status = acpi_evaluate_reference(tz->device->handle, "_PSL", NULL, &devices); if (ACPI_FAILURE(status)) { acpi_handle_info(tz->device->handle, "Invalid passive threshold\n"); - tz->trips.passive.flags.valid = 0; + tz->trips.passive.valid = false; } else { - tz->trips.passive.flags.valid = 1; + tz->trips.passive.valid = true; } if (memcmp(&tz->trips.passive.devices, &devices, @@ -387,24 +317,24 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) } } if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) { - if (valid != tz->trips.passive.flags.valid) + if (valid != tz->trips.passive.valid) ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "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; + valid = tz->trips.active[i].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)) { + tz->trips.active[i].valid)) { status = acpi_evaluate_integer(tz->device->handle, name, NULL, &tmp); if (ACPI_FAILURE(status)) { - tz->trips.active[i].flags.valid = 0; + tz->trips.active[i].valid = false; if (i == 0) break; @@ -426,21 +356,21 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) break; } else { tz->trips.active[i].temperature = tmp; - tz->trips.active[i].flags.valid = 1; + tz->trips.active[i].valid = true; } } name[2] = 'L'; - if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid) { + if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].valid) { memset(&devices, 0, sizeof(struct acpi_handle_list)); status = acpi_evaluate_reference(tz->device->handle, name, NULL, &devices); if (ACPI_FAILURE(status)) { acpi_handle_info(tz->device->handle, "Invalid active%d threshold\n", i); - tz->trips.active[i].flags.valid = 0; + tz->trips.active[i].valid = false; } else { - tz->trips.active[i].flags.valid = 1; + tz->trips.active[i].valid = true; } if (memcmp(&tz->trips.active[i].devices, &devices, @@ -451,10 +381,10 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) } } if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES)) - if (valid != tz->trips.active[i].flags.valid) + if (valid != tz->trips.active[i].valid) ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "state"); - if (!tz->trips.active[i].flags.valid) + if (!tz->trips.active[i].valid) break; } @@ -474,17 +404,18 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) { - int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); + int i, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); + bool valid; if (ret) return ret; - valid = tz->trips.critical.flags.valid | - tz->trips.hot.flags.valid | - tz->trips.passive.flags.valid; + valid = tz->trips.critical.valid | + tz->trips.hot.valid | + tz->trips.passive.valid; for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) - valid |= tz->trips.active[i].flags.valid; + valid = valid || tz->trips.active[i].valid; if (!valid) { pr_warn(FW_BUG "No valid trip found\n"); @@ -521,7 +452,7 @@ static int thermal_get_trip_type(struct thermal_zone_device *thermal, if (!tz || trip < 0) return -EINVAL; - if (tz->trips.critical.flags.valid) { + if (tz->trips.critical.valid) { if (!trip) { *type = THERMAL_TRIP_CRITICAL; return 0; @@ -529,7 +460,7 @@ static int thermal_get_trip_type(struct thermal_zone_device *thermal, trip--; } - if (tz->trips.hot.flags.valid) { + if (tz->trips.hot.valid) { if (!trip) { *type = THERMAL_TRIP_HOT; return 0; @@ -537,7 +468,7 @@ static int thermal_get_trip_type(struct thermal_zone_device *thermal, trip--; } - if (tz->trips.passive.flags.valid) { + if (tz->trips.passive.valid) { if (!trip) { *type = THERMAL_TRIP_PASSIVE; return 0; @@ -545,7 +476,7 @@ static int thermal_get_trip_type(struct thermal_zone_device *thermal, trip--; } - for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && tz->trips.active[i].flags.valid; i++) { + for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && tz->trips.active[i].valid; i++) { if (!trip) { *type = THERMAL_TRIP_ACTIVE; return 0; @@ -565,7 +496,7 @@ static int thermal_get_trip_temp(struct thermal_zone_device *thermal, if (!tz || trip < 0) return -EINVAL; - if (tz->trips.critical.flags.valid) { + if (tz->trips.critical.valid) { if (!trip) { *temp = deci_kelvin_to_millicelsius_with_offset( tz->trips.critical.temperature, @@ -575,7 +506,7 @@ static int thermal_get_trip_temp(struct thermal_zone_device *thermal, trip--; } - if (tz->trips.hot.flags.valid) { + if (tz->trips.hot.valid) { if (!trip) { *temp = deci_kelvin_to_millicelsius_with_offset( tz->trips.hot.temperature, @@ -585,7 +516,7 @@ static int thermal_get_trip_temp(struct thermal_zone_device *thermal, trip--; } - if (tz->trips.passive.flags.valid) { + if (tz->trips.passive.valid) { if (!trip) { *temp = deci_kelvin_to_millicelsius_with_offset( tz->trips.passive.temperature, @@ -596,7 +527,7 @@ static int thermal_get_trip_temp(struct thermal_zone_device *thermal, } for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && - tz->trips.active[i].flags.valid; i++) { + tz->trips.active[i].valid; i++) { if (!trip) { *temp = deci_kelvin_to_millicelsius_with_offset( tz->trips.active[i].temperature, @@ -614,7 +545,7 @@ static int thermal_get_crit_temp(struct thermal_zone_device *thermal, { struct acpi_thermal *tz = thermal_zone_device_priv(thermal); - if (tz->trips.critical.flags.valid) { + if (tz->trips.critical.valid) { *temperature = deci_kelvin_to_millicelsius_with_offset( tz->trips.critical.temperature, tz->kelvin_offset); @@ -700,13 +631,13 @@ static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, int trip = -1; int result = 0; - if (tz->trips.critical.flags.valid) + if (tz->trips.critical.valid) trip++; - if (tz->trips.hot.flags.valid) + if (tz->trips.hot.valid) trip++; - if (tz->trips.passive.flags.valid) { + if (tz->trips.passive.valid) { trip++; for (i = 0; i < tz->trips.passive.devices.count; i++) { handle = tz->trips.passive.devices.handles[i]; @@ -731,7 +662,7 @@ static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, } for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { - if (!tz->trips.active[i].flags.valid) + if (!tz->trips.active[i].valid) break; trip++; @@ -819,19 +750,19 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) acpi_status status; int i; - if (tz->trips.critical.flags.valid) + if (tz->trips.critical.valid) trips++; - if (tz->trips.hot.flags.valid) + if (tz->trips.hot.valid) trips++; - if (tz->trips.passive.flags.valid) + if (tz->trips.passive.valid) trips++; - for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && tz->trips.active[i].flags.valid; + for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && tz->trips.active[i].valid; i++, trips++); - if (tz->trips.passive.flags.valid) + if (tz->trips.passive.valid) tz->thermal_zone = thermal_zone_device_register("acpitz", trips, 0, tz, &acpi_thermal_zone_ops, NULL, tz->trips.passive.tsp * 100, @@ -906,13 +837,13 @@ static void acpi_thermal_notify(struct acpi_device *device, u32 event) acpi_queue_thermal_check(tz); break; case ACPI_THERMAL_NOTIFY_THRESHOLDS: - acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS); + acpi_thermal_trips_update(tz, ACPI_TRIPS_THRESHOLDS); acpi_queue_thermal_check(tz); acpi_bus_generate_netlink_event(device->pnp.device_class, dev_name(&device->dev), event, 0); break; case ACPI_THERMAL_NOTIFY_DEVICES: - acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES); + acpi_thermal_trips_update(tz, ACPI_TRIPS_DEVICES); acpi_queue_thermal_check(tz); acpi_bus_generate_netlink_event(device->pnp.device_class, dev_name(&device->dev), event, 0); @@ -976,9 +907,8 @@ static int acpi_thermal_get_info(struct acpi_thermal *tz) 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; + acpi_execute_simple_method(tz->device->handle, "_SCP", + ACPI_THERMAL_MODE_ACTIVE); /* Get default polling frequency [_TZP] (optional) */ if (tzp) @@ -1001,7 +931,7 @@ static int acpi_thermal_get_info(struct acpi_thermal *tz) */ static void acpi_thermal_guess_offset(struct acpi_thermal *tz) { - if (tz->trips.critical.flags.valid && + if (tz->trips.critical.valid && (tz->trips.critical.temperature % 5) == 1) tz->kelvin_offset = 273100; else @@ -1110,27 +1040,48 @@ static int acpi_thermal_resume(struct device *dev) return -EINVAL; for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { - if (!tz->trips.active[i].flags.valid) + if (!tz->trips.active[i].valid) break; - tz->trips.active[i].flags.enabled = 1; + tz->trips.active[i].enabled = true; for (j = 0; j < tz->trips.active[i].devices.count; j++) { result = acpi_bus_update_power( tz->trips.active[i].devices.handles[j], &power_state); if (result || (power_state != ACPI_STATE_D0)) { - tz->trips.active[i].flags.enabled = 0; + tz->trips.active[i].enabled = false; break; } } - tz->state.active |= tz->trips.active[i].flags.enabled; } acpi_queue_thermal_check(tz); return AE_OK; } +#else +#define acpi_thermal_suspend NULL +#define acpi_thermal_resume NULL #endif +static SIMPLE_DEV_PM_OPS(acpi_thermal_pm, acpi_thermal_suspend, acpi_thermal_resume); + +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 = "thermal", + .class = ACPI_THERMAL_CLASS, + .ids = thermal_device_ids, + .ops = { + .add = acpi_thermal_add, + .remove = acpi_thermal_remove, + .notify = acpi_thermal_notify, + }, + .drv.pm = &acpi_thermal_pm, +}; static int thermal_act(const struct dmi_system_id *d) { if (act == 0) { @@ -1236,3 +1187,7 @@ static void __exit acpi_thermal_exit(void) module_init(acpi_thermal_init); module_exit(acpi_thermal_exit); + +MODULE_AUTHOR("Paul Diefenbaugh"); +MODULE_DESCRIPTION("ACPI Thermal Zone Driver"); +MODULE_LICENSE("GPL"); |