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1/*2 * Copyright 2012 The Nouveau community3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: Martin Peres23 */24#include "priv.h"25 26static void27nvkm_therm_temp_set_defaults(struct nvkm_therm *therm)28{29 therm->bios_sensor.offset_constant = 0;30 31 therm->bios_sensor.thrs_fan_boost.temp = 90;32 therm->bios_sensor.thrs_fan_boost.hysteresis = 3;33 34 therm->bios_sensor.thrs_down_clock.temp = 95;35 therm->bios_sensor.thrs_down_clock.hysteresis = 3;36 37 therm->bios_sensor.thrs_critical.temp = 105;38 therm->bios_sensor.thrs_critical.hysteresis = 5;39 40 therm->bios_sensor.thrs_shutdown.temp = 135;41 therm->bios_sensor.thrs_shutdown.hysteresis = 5; /*not that it matters */42}43 44static void45nvkm_therm_temp_safety_checks(struct nvkm_therm *therm)46{47 struct nvbios_therm_sensor *s = &therm->bios_sensor;48 49 /* enforce a minimum hysteresis on thresholds */50 s->thrs_fan_boost.hysteresis = max_t(u8, s->thrs_fan_boost.hysteresis, 2);51 s->thrs_down_clock.hysteresis = max_t(u8, s->thrs_down_clock.hysteresis, 2);52 s->thrs_critical.hysteresis = max_t(u8, s->thrs_critical.hysteresis, 2);53 s->thrs_shutdown.hysteresis = max_t(u8, s->thrs_shutdown.hysteresis, 2);54}55 56/* must be called with alarm_program_lock taken ! */57void58nvkm_therm_sensor_set_threshold_state(struct nvkm_therm *therm,59 enum nvkm_therm_thrs thrs,60 enum nvkm_therm_thrs_state st)61{62 therm->sensor.alarm_state[thrs] = st;63}64 65/* must be called with alarm_program_lock taken ! */66enum nvkm_therm_thrs_state67nvkm_therm_sensor_get_threshold_state(struct nvkm_therm *therm,68 enum nvkm_therm_thrs thrs)69{70 return therm->sensor.alarm_state[thrs];71}72 73static void74nv_poweroff_work(struct work_struct *work)75{76 orderly_poweroff(true);77 kfree(work);78}79 80void81nvkm_therm_sensor_event(struct nvkm_therm *therm, enum nvkm_therm_thrs thrs,82 enum nvkm_therm_thrs_direction dir)83{84 struct nvkm_subdev *subdev = &therm->subdev;85 bool active;86 static const char * const thresholds[] = {87 "fanboost", "downclock", "critical", "shutdown"88 };89 int temperature = therm->func->temp_get(therm);90 91 if (thrs < 0 || thrs > 3)92 return;93 94 if (dir == NVKM_THERM_THRS_FALLING)95 nvkm_info(subdev,96 "temperature (%i C) went below the '%s' threshold\n",97 temperature, thresholds[thrs]);98 else99 nvkm_info(subdev, "temperature (%i C) hit the '%s' threshold\n",100 temperature, thresholds[thrs]);101 102 active = (dir == NVKM_THERM_THRS_RISING);103 switch (thrs) {104 case NVKM_THERM_THRS_FANBOOST:105 if (active) {106 nvkm_therm_fan_set(therm, true, 100);107 nvkm_therm_fan_mode(therm, NVKM_THERM_CTRL_AUTO);108 }109 break;110 case NVKM_THERM_THRS_DOWNCLOCK:111 if (therm->emergency.downclock)112 therm->emergency.downclock(therm, active);113 break;114 case NVKM_THERM_THRS_CRITICAL:115 if (therm->emergency.pause)116 therm->emergency.pause(therm, active);117 break;118 case NVKM_THERM_THRS_SHUTDOWN:119 if (active) {120 struct work_struct *work;121 122 work = kmalloc(sizeof(*work), GFP_ATOMIC);123 if (work) {124 INIT_WORK(work, nv_poweroff_work);125 schedule_work(work);126 }127 }128 break;129 case NVKM_THERM_THRS_NR:130 break;131 }132 133}134 135/* must be called with alarm_program_lock taken ! */136static void137nvkm_therm_threshold_hyst_polling(struct nvkm_therm *therm,138 const struct nvbios_therm_threshold *thrs,139 enum nvkm_therm_thrs thrs_name)140{141 enum nvkm_therm_thrs_direction direction;142 enum nvkm_therm_thrs_state prev_state, new_state;143 int temp = therm->func->temp_get(therm);144 145 prev_state = nvkm_therm_sensor_get_threshold_state(therm, thrs_name);146 147 if (temp >= thrs->temp && prev_state == NVKM_THERM_THRS_LOWER) {148 direction = NVKM_THERM_THRS_RISING;149 new_state = NVKM_THERM_THRS_HIGHER;150 } else if (temp <= thrs->temp - thrs->hysteresis &&151 prev_state == NVKM_THERM_THRS_HIGHER) {152 direction = NVKM_THERM_THRS_FALLING;153 new_state = NVKM_THERM_THRS_LOWER;154 } else155 return; /* nothing to do */156 157 nvkm_therm_sensor_set_threshold_state(therm, thrs_name, new_state);158 nvkm_therm_sensor_event(therm, thrs_name, direction);159}160 161static void162alarm_timer_callback(struct nvkm_alarm *alarm)163{164 struct nvkm_therm *therm =165 container_of(alarm, struct nvkm_therm, sensor.therm_poll_alarm);166 struct nvbios_therm_sensor *sensor = &therm->bios_sensor;167 struct nvkm_timer *tmr = therm->subdev.device->timer;168 unsigned long flags;169 170 spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags);171 172 nvkm_therm_threshold_hyst_polling(therm, &sensor->thrs_fan_boost,173 NVKM_THERM_THRS_FANBOOST);174 175 nvkm_therm_threshold_hyst_polling(therm,176 &sensor->thrs_down_clock,177 NVKM_THERM_THRS_DOWNCLOCK);178 179 nvkm_therm_threshold_hyst_polling(therm, &sensor->thrs_critical,180 NVKM_THERM_THRS_CRITICAL);181 182 nvkm_therm_threshold_hyst_polling(therm, &sensor->thrs_shutdown,183 NVKM_THERM_THRS_SHUTDOWN);184 185 spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags);186 187 /* schedule the next poll in one second */188 if (therm->func->temp_get(therm) >= 0)189 nvkm_timer_alarm(tmr, 1000000000ULL, alarm);190}191 192void193nvkm_therm_program_alarms_polling(struct nvkm_therm *therm)194{195 struct nvbios_therm_sensor *sensor = &therm->bios_sensor;196 197 nvkm_debug(&therm->subdev,198 "programmed thresholds [ %d(%d), %d(%d), %d(%d), %d(%d) ]\n",199 sensor->thrs_fan_boost.temp,200 sensor->thrs_fan_boost.hysteresis,201 sensor->thrs_down_clock.temp,202 sensor->thrs_down_clock.hysteresis,203 sensor->thrs_critical.temp,204 sensor->thrs_critical.hysteresis,205 sensor->thrs_shutdown.temp,206 sensor->thrs_shutdown.hysteresis);207 208 alarm_timer_callback(&therm->sensor.therm_poll_alarm);209}210 211int212nvkm_therm_sensor_init(struct nvkm_therm *therm)213{214 therm->func->program_alarms(therm);215 return 0;216}217 218int219nvkm_therm_sensor_fini(struct nvkm_therm *therm, bool suspend)220{221 struct nvkm_timer *tmr = therm->subdev.device->timer;222 if (suspend)223 nvkm_timer_alarm(tmr, 0, &therm->sensor.therm_poll_alarm);224 return 0;225}226 227void228nvkm_therm_sensor_preinit(struct nvkm_therm *therm)229{230 const char *sensor_avail = "yes";231 232 if (therm->func->temp_get(therm) < 0)233 sensor_avail = "no";234 235 nvkm_debug(&therm->subdev, "internal sensor: %s\n", sensor_avail);236}237 238int239nvkm_therm_sensor_ctor(struct nvkm_therm *therm)240{241 struct nvkm_subdev *subdev = &therm->subdev;242 struct nvkm_bios *bios = subdev->device->bios;243 244 nvkm_alarm_init(&therm->sensor.therm_poll_alarm, alarm_timer_callback);245 246 nvkm_therm_temp_set_defaults(therm);247 if (nvbios_therm_sensor_parse(bios, NVBIOS_THERM_DOMAIN_CORE,248 &therm->bios_sensor))249 nvkm_error(subdev, "nvbios_therm_sensor_parse failed\n");250 nvkm_therm_temp_safety_checks(therm);251 252 return 0;253}254