diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/therm/temp.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/therm/temp.c | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/therm/temp.c b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/temp.c new file mode 100644 index 0000000000..ddb2b2c600 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/temp.c @@ -0,0 +1,253 @@ +/* + * Copyright 2012 The Nouveau community + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: Martin Peres + */ +#include "priv.h" + +static void +nvkm_therm_temp_set_defaults(struct nvkm_therm *therm) +{ + therm->bios_sensor.offset_constant = 0; + + therm->bios_sensor.thrs_fan_boost.temp = 90; + therm->bios_sensor.thrs_fan_boost.hysteresis = 3; + + therm->bios_sensor.thrs_down_clock.temp = 95; + therm->bios_sensor.thrs_down_clock.hysteresis = 3; + + therm->bios_sensor.thrs_critical.temp = 105; + therm->bios_sensor.thrs_critical.hysteresis = 5; + + therm->bios_sensor.thrs_shutdown.temp = 135; + therm->bios_sensor.thrs_shutdown.hysteresis = 5; /*not that it matters */ +} + +static void +nvkm_therm_temp_safety_checks(struct nvkm_therm *therm) +{ + struct nvbios_therm_sensor *s = &therm->bios_sensor; + + /* enforce a minimum hysteresis on thresholds */ + s->thrs_fan_boost.hysteresis = max_t(u8, s->thrs_fan_boost.hysteresis, 2); + s->thrs_down_clock.hysteresis = max_t(u8, s->thrs_down_clock.hysteresis, 2); + s->thrs_critical.hysteresis = max_t(u8, s->thrs_critical.hysteresis, 2); + s->thrs_shutdown.hysteresis = max_t(u8, s->thrs_shutdown.hysteresis, 2); +} + +/* must be called with alarm_program_lock taken ! */ +void +nvkm_therm_sensor_set_threshold_state(struct nvkm_therm *therm, + enum nvkm_therm_thrs thrs, + enum nvkm_therm_thrs_state st) +{ + therm->sensor.alarm_state[thrs] = st; +} + +/* must be called with alarm_program_lock taken ! */ +enum nvkm_therm_thrs_state +nvkm_therm_sensor_get_threshold_state(struct nvkm_therm *therm, + enum nvkm_therm_thrs thrs) +{ + return therm->sensor.alarm_state[thrs]; +} + +static void +nv_poweroff_work(struct work_struct *work) +{ + orderly_poweroff(true); + kfree(work); +} + +void +nvkm_therm_sensor_event(struct nvkm_therm *therm, enum nvkm_therm_thrs thrs, + enum nvkm_therm_thrs_direction dir) +{ + struct nvkm_subdev *subdev = &therm->subdev; + bool active; + static const char * const thresholds[] = { + "fanboost", "downclock", "critical", "shutdown" + }; + int temperature = therm->func->temp_get(therm); + + if (thrs < 0 || thrs > 3) + return; + + if (dir == NVKM_THERM_THRS_FALLING) + nvkm_info(subdev, + "temperature (%i C) went below the '%s' threshold\n", + temperature, thresholds[thrs]); + else + nvkm_info(subdev, "temperature (%i C) hit the '%s' threshold\n", + temperature, thresholds[thrs]); + + active = (dir == NVKM_THERM_THRS_RISING); + switch (thrs) { + case NVKM_THERM_THRS_FANBOOST: + if (active) { + nvkm_therm_fan_set(therm, true, 100); + nvkm_therm_fan_mode(therm, NVKM_THERM_CTRL_AUTO); + } + break; + case NVKM_THERM_THRS_DOWNCLOCK: + if (therm->emergency.downclock) + therm->emergency.downclock(therm, active); + break; + case NVKM_THERM_THRS_CRITICAL: + if (therm->emergency.pause) + therm->emergency.pause(therm, active); + break; + case NVKM_THERM_THRS_SHUTDOWN: + if (active) { + struct work_struct *work; + + work = kmalloc(sizeof(*work), GFP_ATOMIC); + if (work) { + INIT_WORK(work, nv_poweroff_work); + schedule_work(work); + } + } + break; + case NVKM_THERM_THRS_NR: + break; + } + +} + +/* must be called with alarm_program_lock taken ! */ +static void +nvkm_therm_threshold_hyst_polling(struct nvkm_therm *therm, + const struct nvbios_therm_threshold *thrs, + enum nvkm_therm_thrs thrs_name) +{ + enum nvkm_therm_thrs_direction direction; + enum nvkm_therm_thrs_state prev_state, new_state; + int temp = therm->func->temp_get(therm); + + prev_state = nvkm_therm_sensor_get_threshold_state(therm, thrs_name); + + if (temp >= thrs->temp && prev_state == NVKM_THERM_THRS_LOWER) { + direction = NVKM_THERM_THRS_RISING; + new_state = NVKM_THERM_THRS_HIGHER; + } else if (temp <= thrs->temp - thrs->hysteresis && + prev_state == NVKM_THERM_THRS_HIGHER) { + direction = NVKM_THERM_THRS_FALLING; + new_state = NVKM_THERM_THRS_LOWER; + } else + return; /* nothing to do */ + + nvkm_therm_sensor_set_threshold_state(therm, thrs_name, new_state); + nvkm_therm_sensor_event(therm, thrs_name, direction); +} + +static void +alarm_timer_callback(struct nvkm_alarm *alarm) +{ + struct nvkm_therm *therm = + container_of(alarm, struct nvkm_therm, sensor.therm_poll_alarm); + struct nvbios_therm_sensor *sensor = &therm->bios_sensor; + struct nvkm_timer *tmr = therm->subdev.device->timer; + unsigned long flags; + + spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags); + + nvkm_therm_threshold_hyst_polling(therm, &sensor->thrs_fan_boost, + NVKM_THERM_THRS_FANBOOST); + + nvkm_therm_threshold_hyst_polling(therm, + &sensor->thrs_down_clock, + NVKM_THERM_THRS_DOWNCLOCK); + + nvkm_therm_threshold_hyst_polling(therm, &sensor->thrs_critical, + NVKM_THERM_THRS_CRITICAL); + + nvkm_therm_threshold_hyst_polling(therm, &sensor->thrs_shutdown, + NVKM_THERM_THRS_SHUTDOWN); + + spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags); + + /* schedule the next poll in one second */ + if (therm->func->temp_get(therm) >= 0) + nvkm_timer_alarm(tmr, 1000000000ULL, alarm); +} + +void +nvkm_therm_program_alarms_polling(struct nvkm_therm *therm) +{ + struct nvbios_therm_sensor *sensor = &therm->bios_sensor; + + nvkm_debug(&therm->subdev, + "programmed thresholds [ %d(%d), %d(%d), %d(%d), %d(%d) ]\n", + sensor->thrs_fan_boost.temp, + sensor->thrs_fan_boost.hysteresis, + sensor->thrs_down_clock.temp, + sensor->thrs_down_clock.hysteresis, + sensor->thrs_critical.temp, + sensor->thrs_critical.hysteresis, + sensor->thrs_shutdown.temp, + sensor->thrs_shutdown.hysteresis); + + alarm_timer_callback(&therm->sensor.therm_poll_alarm); +} + +int +nvkm_therm_sensor_init(struct nvkm_therm *therm) +{ + therm->func->program_alarms(therm); + return 0; +} + +int +nvkm_therm_sensor_fini(struct nvkm_therm *therm, bool suspend) +{ + struct nvkm_timer *tmr = therm->subdev.device->timer; + if (suspend) + nvkm_timer_alarm(tmr, 0, &therm->sensor.therm_poll_alarm); + return 0; +} + +void +nvkm_therm_sensor_preinit(struct nvkm_therm *therm) +{ + const char *sensor_avail = "yes"; + + if (therm->func->temp_get(therm) < 0) + sensor_avail = "no"; + + nvkm_debug(&therm->subdev, "internal sensor: %s\n", sensor_avail); +} + +int +nvkm_therm_sensor_ctor(struct nvkm_therm *therm) +{ + struct nvkm_subdev *subdev = &therm->subdev; + struct nvkm_bios *bios = subdev->device->bios; + + nvkm_alarm_init(&therm->sensor.therm_poll_alarm, alarm_timer_callback); + + nvkm_therm_temp_set_defaults(therm); + if (nvbios_therm_sensor_parse(bios, NVBIOS_THERM_DOMAIN_CORE, + &therm->bios_sensor)) + nvkm_error(subdev, "nvbios_therm_sensor_parse failed\n"); + nvkm_therm_temp_safety_checks(therm); + + return 0; +} |