/*
* 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"
#include <core/option.h>
#include <subdev/pmu.h>
int
nvkm_therm_temp_get(struct nvkm_therm *therm)
{
if (therm->func->temp_get)
return therm->func->temp_get(therm);
return -ENODEV;
}
static int
nvkm_therm_update_trip(struct nvkm_therm *therm)
{
struct nvbios_therm_trip_point *trip = therm->fan->bios.trip,
*cur_trip = NULL,
*last_trip = therm->last_trip;
u8 temp = therm->func->temp_get(therm);
u16 duty, i;
/* look for the trip point corresponding to the current temperature */
cur_trip = NULL;
for (i = 0; i < therm->fan->bios.nr_fan_trip; i++) {
if (temp >= trip[i].temp)
cur_trip = &trip[i];
}
/* account for the hysteresis cycle */
if (last_trip && temp <= (last_trip->temp) &&
temp > (last_trip->temp - last_trip->hysteresis))
cur_trip = last_trip;
if (cur_trip) {
duty = cur_trip->fan_duty;
therm->last_trip = cur_trip;
} else {
duty = 0;
therm->last_trip = NULL;
}
return duty;
}
static int
nvkm_therm_compute_linear_duty(struct nvkm_therm *therm, u8 linear_min_temp,
u8 linear_max_temp)
{
u8 temp = therm->func->temp_get(therm);
u16 duty;
/* handle the non-linear part first */
if (temp < linear_min_temp)
return therm->fan->bios.min_duty;
else if (temp > linear_max_temp)
return therm->fan->bios.max_duty;
/* we are in the linear zone */
duty = (temp - linear_min_temp);
duty *= (therm->fan->bios.max_duty - therm->fan->bios.min_duty);
duty /= (linear_max_temp - linear_min_temp);
duty += therm->fan->bios.min_duty;
return duty;
}
static int
nvkm_therm_update_linear(struct nvkm_therm *therm)
{
u8 min = therm->fan->bios.linear_min_temp;
u8 max = therm->fan->bios.linear_max_temp;
return nvkm_therm_compute_linear_duty(therm, min, max);
}
static int
nvkm_therm_update_linear_fallback(struct nvkm_therm *therm)
{
u8 max = therm->bios_sensor.thrs_fan_boost.temp;
return nvkm_therm_compute_linear_duty(therm, 30, max);
}
static void
nvkm_therm_update(struct nvkm_therm *therm, int mode)
{
struct nvkm_subdev *subdev = &therm->subdev;
struct nvkm_timer *tmr = subdev->device->timer;
unsigned long flags;
bool immd = true;
bool poll = true;
int duty = -1;
spin_lock_irqsave(&therm->lock, flags);
if (mode < 0)
mode = therm->mode;
therm->mode = mode;
switch (mode) {
case NVKM_THERM_CTRL_MANUAL:
nvkm_timer_alarm(tmr, 0, &therm->alarm);
duty = nvkm_therm_fan_get(therm);
if (duty < 0)
duty = 100;
poll = false;
break;
case NVKM_THERM_CTRL_AUTO:
switch(therm->fan->bios.fan_mode) {
case NVBIOS_THERM_FAN_TRIP:
duty = nvkm_therm_update_trip(therm);
break;
case NVBIOS_THERM_FAN_LINEAR:
duty = nvkm_therm_update_linear(therm);
break;
case NVBIOS_THERM_FAN_OTHER:
if (therm->cstate) {
duty = therm->cstate;
poll = false;
} else {
duty = nvkm_therm_update_linear_fallback(therm);
}
break;
}
immd = false;
break;
case NVKM_THERM_CTRL_NONE:
default:
nvkm_timer_alarm(tmr, 0, &therm->alarm);
poll = false;
}
if (poll)
nvkm_timer_alarm(tmr, 1000000000ULL, &therm->alarm);
spin_unlock_irqrestore(&therm->lock, flags);
if (duty >= 0) {
nvkm_debug(subdev, "FAN target request: %d%%\n", duty);
nvkm_therm_fan_set(therm, immd, duty);
}
}
int
nvkm_therm_cstate(struct nvkm_therm *therm, int fan, int dir)
{
struct nvkm_subdev *subdev = &therm->subdev;
if (!dir || (dir < 0 && fan < therm->cstate) ||
(dir > 0 && fan > therm->cstate)) {
nvkm_debug(subdev, "default fan speed -> %d%%\n", fan);
therm->cstate = fan;
nvkm_therm_update(therm, -1);
}
return 0;
}
static void
nvkm_therm_alarm(struct nvkm_alarm *alarm)
{
struct nvkm_therm *therm =
container_of(alarm, struct nvkm_therm, alarm);
nvkm_therm_update(therm, -1);
}
int
nvkm_therm_fan_mode(struct nvkm_therm *therm, int mode)
{
struct nvkm_subdev *subdev = &therm->subdev;
struct nvkm_device *device = subdev->device;
static const char *name[] = {
"disabled",
"manual",
"automatic"
};
/* The default PPWR ucode on fermi interferes with fan management */
if ((mode >= ARRAY_SIZE(name)) ||
(mode != NVKM_THERM_CTRL_NONE && nvkm_pmu_fan_controlled(device)))
return -EINVAL;
/* do not allow automatic fan management if the thermal sensor is
* not available */
if (mode == NVKM_THERM_CTRL_AUTO &&
therm->func->temp_get(therm) < 0)
return -EINVAL;
if (therm->mode == mode)
return 0;
nvkm_debug(subdev, "fan management: %s\n", name[mode]);
nvkm_therm_update(therm, mode);
return 0;
}
int
nvkm_therm_attr_get(struct nvkm_therm *therm, enum nvkm_therm_attr_type type)
{
switch (type) {
case NVKM_THERM_ATTR_FAN_MIN_DUTY:
return therm->fan->bios.min_duty;
case NVKM_THERM_ATTR_FAN_MAX_DUTY:
return therm->fan->bios.max_duty;
case NVKM_THERM_ATTR_FAN_MODE:
return therm->mode;
case NVKM_THERM_ATTR_THRS_FAN_BOOST:
return therm->bios_sensor.thrs_fan_boost.temp;
case NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST:
return therm->bios_sensor.thrs_fan_boost.hysteresis;
case NVKM_THERM_ATTR_THRS_DOWN_CLK:
return therm->bios_sensor.thrs_down_clock.temp;
case NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST:
return therm->bios_sensor.thrs_down_clock.hysteresis;
case NVKM_THERM_ATTR_THRS_CRITICAL:
return therm->bios_sensor.thrs_critical.temp;
case NVKM_THERM_ATTR_THRS_CRITICAL_HYST:
return therm->bios_sensor.thrs_critical.hysteresis;
case NVKM_THERM_ATTR_THRS_SHUTDOWN:
return therm->bios_sensor.thrs_shutdown.temp;
case NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST:
return therm->bios_sensor.thrs_shutdown.hysteresis;
}
return -EINVAL;
}
int
nvkm_therm_attr_set(struct nvkm_therm *therm,
enum nvkm_therm_attr_type type, int value)
{
switch (type) {
case NVKM_THERM_ATTR_FAN_MIN_DUTY:
if (value < 0)
value = 0;
if (value > therm->fan->bios.max_duty)
value = therm->fan->bios.max_duty;
therm->fan->bios.min_duty = value;
return 0;
case NVKM_THERM_ATTR_FAN_MAX_DUTY:
if (value < 0)
value = 0;
if (value < therm->fan->bios.min_duty)
value = therm->fan->bios.min_duty;
therm->fan->bios.max_duty = value;
return 0;
case NVKM_THERM_ATTR_FAN_MODE:
return nvkm_therm_fan_mode(therm, value);
case NVKM_THERM_ATTR_THRS_FAN_BOOST:
therm->bios_sensor.thrs_fan_boost.temp = value;
therm->func->program_alarms(therm);
return 0;
case NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST:
therm->bios_sensor.thrs_fan_boost.hysteresis = value;
therm->func->program_alarms(therm);
return 0;
case NVKM_THERM_ATTR_THRS_DOWN_CLK:
therm->bios_sensor.thrs_down_clock.temp = value;
therm->func->program_alarms(therm);
return 0;
case NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST:
therm->bios_sensor.thrs_down_clock.hysteresis = value;
therm->func->program_alarms(therm);
return 0;
case NVKM_THERM_ATTR_THRS_CRITICAL:
therm->bios_sensor.thrs_critical.temp = value;
therm->func->program_alarms(therm);
return 0;
case NVKM_THERM_ATTR_THRS_CRITICAL_HYST:
therm->bios_sensor.thrs_critical.hysteresis = value;
therm->func->program_alarms(therm);
return 0;
case NVKM_THERM_ATTR_THRS_SHUTDOWN:
therm->bios_sensor.thrs_shutdown.temp = value;
therm->func->program_alarms(therm);
return 0;
case NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST:
therm->bios_sensor.thrs_shutdown.hysteresis = value;
therm->func->program_alarms(therm);
return 0;
}
return -EINVAL;
}
void
nvkm_therm_clkgate_enable(struct nvkm_therm *therm)
{
if (!therm || !therm->func->clkgate_enable || !therm->clkgating_enabled)
return;
nvkm_debug(&therm->subdev,
"Enabling clockgating\n");
therm->func->clkgate_enable(therm);
}
void
nvkm_therm_clkgate_fini(struct nvkm_therm *therm, bool suspend)
{
if (!therm || !therm->func->clkgate_fini || !therm->clkgating_enabled)
return;
nvkm_debug(&therm->subdev,
"Preparing clockgating for %s\n",
suspend ? "suspend" : "fini");
therm->func->clkgate_fini(therm, suspend);
}
static void
nvkm_therm_clkgate_oneinit(struct nvkm_therm *therm)
{
if (!therm->func->clkgate_enable || !therm->clkgating_enabled)
return;
nvkm_info(&therm->subdev, "Clockgating enabled\n");
}
static void
nvkm_therm_intr(struct nvkm_subdev *subdev)
{
struct nvkm_therm *therm = nvkm_therm(subdev);
if (therm->func->intr)
therm->func->intr(therm);
}
static int
nvkm_therm_fini(struct nvkm_subdev *subdev, bool suspend)
{
struct nvkm_therm *therm = nvkm_therm(subdev);
if (therm->func->fini)
therm->func->fini(therm);
nvkm_therm_fan_fini(therm, suspend);
nvkm_therm_sensor_fini(therm, suspend);
if (suspend) {
therm->suspend = therm->mode;
therm->mode = NVKM_THERM_CTRL_NONE;
}
return 0;
}
static int
nvkm_therm_oneinit(struct nvkm_subdev *subdev)
{
struct nvkm_therm *therm = nvkm_therm(subdev);
nvkm_therm_sensor_ctor(therm);
nvkm_therm_ic_ctor(therm);
nvkm_therm_fan_ctor(therm);
nvkm_therm_fan_mode(therm, NVKM_THERM_CTRL_AUTO);
nvkm_therm_sensor_preinit(therm);
nvkm_therm_clkgate_oneinit(therm);
return 0;
}
static int
nvkm_therm_init(struct nvkm_subdev *subdev)
{
struct nvkm_therm *therm = nvkm_therm(subdev);
if (therm->func->init)
therm->func->init(therm);
if (therm->suspend >= 0) {
/* restore the pwm value only when on manual or auto mode */
if (therm->suspend > 0)
nvkm_therm_fan_set(therm, true, therm->fan->percent);
nvkm_therm_fan_mode(therm, therm->suspend);
}
nvkm_therm_sensor_init(therm);
nvkm_therm_fan_init(therm);
return 0;
}
void
nvkm_therm_clkgate_init(struct nvkm_therm *therm,
const struct nvkm_therm_clkgate_pack *p)
{
if (!therm || !therm->func->clkgate_init || !therm->clkgating_enabled)
return;
therm->func->clkgate_init(therm, p);
}
static void *
nvkm_therm_dtor(struct nvkm_subdev *subdev)
{
struct nvkm_therm *therm = nvkm_therm(subdev);
kfree(therm->fan);
return therm;
}
static const struct nvkm_subdev_func
nvkm_therm = {
.dtor = nvkm_therm_dtor,
.oneinit = nvkm_therm_oneinit,
.init = nvkm_therm_init,
.fini = nvkm_therm_fini,
.intr = nvkm_therm_intr,
};
void
nvkm_therm_ctor(struct nvkm_therm *therm, struct nvkm_device *device, enum nvkm_subdev_type type,
int inst, const struct nvkm_therm_func *func)
{
nvkm_subdev_ctor(&nvkm_therm, device, type, inst, &therm->subdev);
therm->func = func;
nvkm_alarm_init(&therm->alarm, nvkm_therm_alarm);
spin_lock_init(&therm->lock);
spin_lock_init(&therm->sensor.alarm_program_lock);
therm->fan_get = nvkm_therm_fan_user_get;
therm->fan_set = nvkm_therm_fan_user_set;
therm->attr_get = nvkm_therm_attr_get;
therm->attr_set = nvkm_therm_attr_set;
therm->mode = therm->suspend = -1; /* undefined */
therm->clkgating_enabled = nvkm_boolopt(device->cfgopt,
"NvPmEnableGating", false);
}
int
nvkm_therm_new_(const struct nvkm_therm_func *func, struct nvkm_device *device,
enum nvkm_subdev_type type, int inst, struct nvkm_therm **ptherm)
{
struct nvkm_therm *therm;
if (!(therm = *ptherm = kzalloc(sizeof(*therm), GFP_KERNEL)))
return -ENOMEM;
nvkm_therm_ctor(therm, device, type, inst, func);
return 0;
}
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