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