drivers/gpu/drm/nouveau/core/subdev/therm/temp.c

   1 /*
   2  * Copyright 2012 The Nouveau community
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * 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 OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Martin Peres
  23  */
  24
  25 #include "priv.h"
  26
  27 #include <core/object.h>
  28 #include <core/device.h>
  29
  30 #include <subdev/bios.h>
  31
  32 static void
  33 nouveau_therm_temp_set_defaults(struct nouveau_therm *therm)
  34 {
  35         struct nouveau_therm_priv *priv = (void *)therm;
  36
  37         priv->bios_sensor.offset_constant = 0;
  38
  39         priv->bios_sensor.thrs_fan_boost.temp = 90;
  40         priv->bios_sensor.thrs_fan_boost.hysteresis = 3;
  41
  42         priv->bios_sensor.thrs_down_clock.temp = 95;
  43         priv->bios_sensor.thrs_down_clock.hysteresis = 3;
  44
  45         priv->bios_sensor.thrs_critical.temp = 105;
  46         priv->bios_sensor.thrs_critical.hysteresis = 5;
  47
  48         priv->bios_sensor.thrs_shutdown.temp = 135;
  49         priv->bios_sensor.thrs_shutdown.hysteresis = 5; /*not that it matters */
  50 }
  51
  52
  53 static void
  54 nouveau_therm_temp_safety_checks(struct nouveau_therm *therm)
  55 {
  56         struct nouveau_therm_priv *priv = (void *)therm;
  57         struct nvbios_therm_sensor *s = &priv->bios_sensor;
  58
  59         /* enforce a minimum hysteresis on thresholds */
  60         s->thrs_fan_boost.hysteresis = max_t(u8, s->thrs_fan_boost.hysteresis, 2);
  61         s->thrs_down_clock.hysteresis = max_t(u8, s->thrs_down_clock.hysteresis, 2);
  62         s->thrs_critical.hysteresis = max_t(u8, s->thrs_critical.hysteresis, 2);
  63         s->thrs_shutdown.hysteresis = max_t(u8, s->thrs_shutdown.hysteresis, 2);
  64 }
  65
  66 /* must be called with alarm_program_lock taken ! */
  67 void nouveau_therm_sensor_set_threshold_state(struct nouveau_therm *therm,
  68                                              enum nouveau_therm_thrs thrs,
  69                                              enum nouveau_therm_thrs_state st)
  70 {
  71         struct nouveau_therm_priv *priv = (void *)therm;
  72         priv->sensor.alarm_state[thrs] = st;
  73 }
  74
  75 /* must be called with alarm_program_lock taken ! */
  76 enum nouveau_therm_thrs_state
  77 nouveau_therm_sensor_get_threshold_state(struct nouveau_therm *therm,
  78                                          enum nouveau_therm_thrs thrs)
  79 {
  80         struct nouveau_therm_priv *priv = (void *)therm;
  81         return priv->sensor.alarm_state[thrs];
  82 }
  83
  84 static void
  85 nv_poweroff_work(struct work_struct *work)
  86 {
  87         orderly_poweroff(true);
  88         kfree(work);
  89 }
  90
  91 void nouveau_therm_sensor_event(struct nouveau_therm *therm,
  92                                 enum nouveau_therm_thrs thrs,
  93                                 enum nouveau_therm_thrs_direction dir)
  94 {
  95         struct nouveau_therm_priv *priv = (void *)therm;
  96         bool active;
  97         const char *thresolds[] = {
  98                 "fanboost", "downclock", "critical", "shutdown"
  99         };
 100         int temperature = therm->temp_get(therm);
 101
 102         if (thrs < 0 || thrs > 3)
 103                 return;
 104
 105         if (dir == NOUVEAU_THERM_THRS_FALLING)
 106                 nv_info(therm, "temperature (%i C) went below the '%s' threshold\n",
 107                         temperature, thresolds[thrs]);
 108         else
 109                 nv_info(therm, "temperature (%i C) hit the '%s' threshold\n",
 110                         temperature, thresolds[thrs]);
 111
 112         active = (dir == NOUVEAU_THERM_THRS_RISING);
 113         switch (thrs) {
 114         case NOUVEAU_THERM_THRS_FANBOOST:
 115                 if (active) {
 116                         nouveau_therm_fan_set(therm, true, 100);
 117                         nouveau_therm_fan_mode(therm, NOUVEAU_THERM_CTRL_AUTO);
 118                 }
 119                 break;
 120         case NOUVEAU_THERM_THRS_DOWNCLOCK:
 121                 if (priv->emergency.downclock)
 122                         priv->emergency.downclock(therm, active);
 123                 break;
 124         case NOUVEAU_THERM_THRS_CRITICAL:
 125                 if (priv->emergency.pause)
 126                         priv->emergency.pause(therm, active);
 127                 break;
 128         case NOUVEAU_THERM_THRS_SHUTDOWN:
 129                 if (active) {
 130                         struct work_struct *work;
 131
 132                         work = kmalloc(sizeof(*work), GFP_ATOMIC);
 133                         if (work) {
 134                                 INIT_WORK(work, nv_poweroff_work);
 135                                 schedule_work(work);
 136                         }
 137                 }
 138                 break;
 139         case NOUVEAU_THERM_THRS_NR:
 140                 break;
 141         }
 142
 143 }
 144
 145 /* must be called with alarm_program_lock taken ! */
 146 static void
 147 nouveau_therm_threshold_hyst_polling(struct nouveau_therm *therm,
 148                                    const struct nvbios_therm_threshold *thrs,
 149                                    enum nouveau_therm_thrs thrs_name)
 150 {
 151         enum nouveau_therm_thrs_direction direction;
 152         enum nouveau_therm_thrs_state prev_state, new_state;
 153         int temp = therm->temp_get(therm);
 154
 155         prev_state = nouveau_therm_sensor_get_threshold_state(therm, thrs_name);
 156
 157         if (temp >= thrs->temp && prev_state == NOUVEAU_THERM_THRS_LOWER) {
 158                 direction = NOUVEAU_THERM_THRS_RISING;
 159                 new_state = NOUVEAU_THERM_THRS_HIGHER;
 160         } else if (temp <= thrs->temp - thrs->hysteresis &&
 161                         prev_state == NOUVEAU_THERM_THRS_HIGHER) {
 162                 direction = NOUVEAU_THERM_THRS_FALLING;
 163                 new_state = NOUVEAU_THERM_THRS_LOWER;
 164         } else
 165                 return; /* nothing to do */
 166
 167         nouveau_therm_sensor_set_threshold_state(therm, thrs_name, new_state);
 168         nouveau_therm_sensor_event(therm, thrs_name, direction);
 169 }
 170
 171 static void
 172 alarm_timer_callback(struct nouveau_alarm *alarm)
 173 {
 174         struct nouveau_therm_priv *priv =
 175         container_of(alarm, struct nouveau_therm_priv, sensor.therm_poll_alarm);
 176         struct nvbios_therm_sensor *sensor = &priv->bios_sensor;
 177         struct nouveau_timer *ptimer = nouveau_timer(priv);
 178         struct nouveau_therm *therm = &priv->base;
 179         unsigned long flags;
 180
 181         spin_lock_irqsave(&priv->sensor.alarm_program_lock, flags);
 182
 183         nouveau_therm_threshold_hyst_polling(therm, &sensor->thrs_fan_boost,
 184                                              NOUVEAU_THERM_THRS_FANBOOST);
 185
 186         nouveau_therm_threshold_hyst_polling(therm, &sensor->thrs_down_clock,
 187                                              NOUVEAU_THERM_THRS_DOWNCLOCK);
 188
 189         nouveau_therm_threshold_hyst_polling(therm, &sensor->thrs_critical,
 190                                              NOUVEAU_THERM_THRS_CRITICAL);
 191
 192         nouveau_therm_threshold_hyst_polling(therm, &sensor->thrs_shutdown,
 193                                              NOUVEAU_THERM_THRS_SHUTDOWN);
 194
 195         /* schedule the next poll in one second */
 196         if (therm->temp_get(therm) >= 0 && list_empty(&alarm->head))
 197                 ptimer->alarm(ptimer, 1000 * 1000 * 1000, alarm);
 198
 199         spin_unlock_irqrestore(&priv->sensor.alarm_program_lock, flags);
 200 }
 201
 202 void
 203 nouveau_therm_program_alarms_polling(struct nouveau_therm *therm)
 204 {
 205         struct nouveau_therm_priv *priv = (void *)therm;
 206         struct nvbios_therm_sensor *sensor = &priv->bios_sensor;
 207
 208         nv_debug(therm,
 209                  "programmed thresholds [ %d(%d), %d(%d), %d(%d), %d(%d) ]\n",
 210                  sensor->thrs_fan_boost.temp, sensor->thrs_fan_boost.hysteresis,
 211                  sensor->thrs_down_clock.temp,
 212                  sensor->thrs_down_clock.hysteresis,
 213                  sensor->thrs_critical.temp, sensor->thrs_critical.hysteresis,
 214                  sensor->thrs_shutdown.temp, sensor->thrs_shutdown.hysteresis);
 215
 216         alarm_timer_callback(&priv->sensor.therm_poll_alarm);
 217 }
 218
 219 int
 220 nouveau_therm_sensor_init(struct nouveau_therm *therm)
 221 {
 222         struct nouveau_therm_priv *priv = (void *)therm;
 223         priv->sensor.program_alarms(therm);
 224         return 0;
 225 }
 226
 227 int
 228 nouveau_therm_sensor_fini(struct nouveau_therm *therm, bool suspend)
 229 {
 230         struct nouveau_therm_priv *priv = (void *)therm;
 231         struct nouveau_timer *ptimer = nouveau_timer(therm);
 232
 233         if (suspend)
 234                 ptimer->alarm_cancel(ptimer, &priv->sensor.therm_poll_alarm);
 235         return 0;
 236 }
 237
 238 void
 239 nouveau_therm_sensor_preinit(struct nouveau_therm *therm)
 240 {
 241         const char *sensor_avail = "yes";
 242
 243         if (therm->temp_get(therm) < 0)
 244                 sensor_avail = "no";
 245
 246         nv_info(therm, "internal sensor: %s\n", sensor_avail);
 247 }
 248
 249 int
 250 nouveau_therm_sensor_ctor(struct nouveau_therm *therm)
 251 {
 252         struct nouveau_therm_priv *priv = (void *)therm;
 253         struct nouveau_bios *bios = nouveau_bios(therm);
 254
 255         nouveau_alarm_init(&priv->sensor.therm_poll_alarm, alarm_timer_callback);
 256
 257         nouveau_therm_temp_set_defaults(therm);
 258         if (nvbios_therm_sensor_parse(bios, NVBIOS_THERM_DOMAIN_CORE,
 259                                       &priv->bios_sensor))
 260                 nv_error(therm, "nvbios_therm_sensor_parse failed\n");
 261         nouveau_therm_temp_safety_checks(therm);
 262
 263         return 0;
 264 }