/*
* 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;
}
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