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.slope_mult = 1;
  38         priv->bios_sensor.slope_div = 1;
  39         priv->bios_sensor.offset_num = 0;
  40         priv->bios_sensor.offset_den = 1;
  41         priv->bios_sensor.offset_constant = 0;
  42
  43         priv->bios_sensor.thrs_fan_boost.temp = 90;
  44         priv->bios_sensor.thrs_fan_boost.hysteresis = 3;
  45
  46         priv->bios_sensor.thrs_down_clock.temp = 95;
  47         priv->bios_sensor.thrs_down_clock.hysteresis = 3;
  48
  49         priv->bios_sensor.thrs_critical.temp = 105;
  50         priv->bios_sensor.thrs_critical.hysteresis = 5;
  51
  52         priv->bios_sensor.thrs_shutdown.temp = 135;
  53         priv->bios_sensor.thrs_shutdown.hysteresis = 5; /*not that it matters */
  54 }
  55
  56
  57 static void
  58 nouveau_therm_temp_safety_checks(struct nouveau_therm *therm)
  59 {
  60         struct nouveau_therm_priv *priv = (void *)therm;
  61         struct nvbios_therm_sensor *s = &priv->bios_sensor;
  62
  63         if (!priv->bios_sensor.slope_div)
  64                 priv->bios_sensor.slope_div = 1;
  65         if (!priv->bios_sensor.offset_den)
  66                 priv->bios_sensor.offset_den = 1;
  67
  68         /* enforce a minimum hysteresis on thresholds */
  69         s->thrs_fan_boost.hysteresis = max_t(u8, s->thrs_fan_boost.hysteresis, 2);
  70         s->thrs_down_clock.hysteresis = max_t(u8, s->thrs_down_clock.hysteresis, 2);
  71         s->thrs_critical.hysteresis = max_t(u8, s->thrs_critical.hysteresis, 2);
  72         s->thrs_shutdown.hysteresis = max_t(u8, s->thrs_shutdown.hysteresis, 2);
  73 }
  74
  75 /* must be called with alarm_program_lock taken ! */
  76 void nouveau_therm_sensor_set_threshold_state(struct nouveau_therm *therm,
  77                                              enum nouveau_therm_thrs thrs,
  78                                              enum nouveau_therm_thrs_state st)
  79 {
  80         struct nouveau_therm_priv *priv = (void *)therm;
  81         priv->sensor.alarm_state[thrs] = st;
  82 }
  83
  84 /* must be called with alarm_program_lock taken ! */
  85 enum nouveau_therm_thrs_state
  86 nouveau_therm_sensor_get_threshold_state(struct nouveau_therm *therm,
  87                                          enum nouveau_therm_thrs thrs)
  88 {
  89         struct nouveau_therm_priv *priv = (void *)therm;
  90         return priv->sensor.alarm_state[thrs];
  91 }
  92
  93 static void
  94 nv_poweroff_work(struct work_struct *work)
  95 {
  96         orderly_poweroff(true);
  97         kfree(work);
  98 }
  99
 100 void nouveau_therm_sensor_event(struct nouveau_therm *therm,
 101                                 enum nouveau_therm_thrs thrs,
 102                                 enum nouveau_therm_thrs_direction dir)
 103 {
 104         struct nouveau_therm_priv *priv = (void *)therm;
 105         bool active;
 106         const char *thresolds[] = {
 107                 "fanboost", "downclock", "critical", "shutdown"
 108         };
 109         uint8_t temperature = therm->temp_get(therm);
 110
 111         if (thrs < 0 || thrs > 3)
 112                 return;
 113
 114         if (dir == NOUVEAU_THERM_THRS_FALLING)
 115                 nv_info(therm, "temperature (%u C) went below the '%s' threshold\n",
 116                         temperature, thresolds[thrs]);
 117         else
 118                 nv_info(therm, "temperature (%u C) hit the '%s' threshold\n",
 119                         temperature, thresolds[thrs]);
 120
 121         active = (dir == NOUVEAU_THERM_THRS_RISING);
 122         switch (thrs) {
 123         case NOUVEAU_THERM_THRS_FANBOOST:
 124                 if (active) {
 125                         nouveau_therm_fan_set(therm, true, 100);
 126                         nouveau_therm_mode(therm, NOUVEAU_THERM_CTRL_AUTO);
 127                 }
 128                 break;
 129         case NOUVEAU_THERM_THRS_DOWNCLOCK:
 130                 if (priv->emergency.downclock)
 131                         priv->emergency.downclock(therm, active);
 132                 break;
 133         case NOUVEAU_THERM_THRS_CRITICAL:
 134                 if (priv->emergency.pause)
 135                         priv->emergency.pause(therm, active);
 136                 break;
 137         case NOUVEAU_THERM_THRS_SHUTDOWN:
 138                 if (active) {
 139                         struct work_struct *work;
 140
 141                         work = kmalloc(sizeof(*work), GFP_ATOMIC);
 142                         if (work) {
 143                                 INIT_WORK(work, nv_poweroff_work);
 144                                 schedule_work(work);
 145                         }
 146                 }
 147                 break;
 148         case NOUVEAU_THERM_THRS_NR:
 149                 break;
 150         }
 151
 152 }
 153
 154 /* must be called with alarm_program_lock taken ! */
 155 static void
 156 nouveau_therm_threshold_hyst_polling(struct nouveau_therm *therm,
 157                                    const struct nvbios_therm_threshold *thrs,
 158                                    enum nouveau_therm_thrs thrs_name)
 159 {
 160         enum nouveau_therm_thrs_direction direction;
 161         enum nouveau_therm_thrs_state prev_state, new_state;
 162         int temp = therm->temp_get(therm);
 163
 164         prev_state = nouveau_therm_sensor_get_threshold_state(therm, thrs_name);
 165
 166         if (temp >= thrs->temp && prev_state == NOUVEAU_THERM_THRS_LOWER) {
 167                 direction = NOUVEAU_THERM_THRS_RISING;
 168                 new_state = NOUVEAU_THERM_THRS_HIGHER;
 169         } else if (temp <= thrs->temp - thrs->hysteresis &&
 170                         prev_state == NOUVEAU_THERM_THRS_HIGHER) {
 171                 direction = NOUVEAU_THERM_THRS_FALLING;
 172                 new_state = NOUVEAU_THERM_THRS_LOWER;
 173         } else
 174                 return; /* nothing to do */
 175
 176         nouveau_therm_sensor_set_threshold_state(therm, thrs_name, new_state);
 177         nouveau_therm_sensor_event(therm, thrs_name, direction);
 178 }
 179
 180 static void
 181 alarm_timer_callback(struct nouveau_alarm *alarm)
 182 {
 183         struct nouveau_therm_priv *priv =
 184         container_of(alarm, struct nouveau_therm_priv, sensor.therm_poll_alarm);
 185         struct nvbios_therm_sensor *sensor = &priv->bios_sensor;
 186         struct nouveau_timer *ptimer = nouveau_timer(priv);
 187         struct nouveau_therm *therm = &priv->base;
 188         unsigned long flags;
 189
 190         spin_lock_irqsave(&priv->sensor.alarm_program_lock, flags);
 191
 192         nouveau_therm_threshold_hyst_polling(therm, &sensor->thrs_fan_boost,
 193                                              NOUVEAU_THERM_THRS_FANBOOST);
 194
 195         nouveau_therm_threshold_hyst_polling(therm, &sensor->thrs_down_clock,
 196                                              NOUVEAU_THERM_THRS_DOWNCLOCK);
 197
 198         nouveau_therm_threshold_hyst_polling(therm, &sensor->thrs_critical,
 199                                              NOUVEAU_THERM_THRS_CRITICAL);
 200
 201         nouveau_therm_threshold_hyst_polling(therm, &sensor->thrs_shutdown,
 202                                              NOUVEAU_THERM_THRS_SHUTDOWN);
 203
 204         /* schedule the next poll in one second */
 205         if (list_empty(&alarm->head))
 206                 ptimer->alarm(ptimer, 1000 * 1000 * 1000, alarm);
 207
 208         spin_unlock_irqrestore(&priv->sensor.alarm_program_lock, flags);
 209 }
 210
 211 void
 212 nouveau_therm_program_alarms_polling(struct nouveau_therm *therm)
 213 {
 214         struct nouveau_therm_priv *priv = (void *)therm;
 215         struct nvbios_therm_sensor *sensor = &priv->bios_sensor;
 216
 217         nv_info(therm,
 218                 "programmed thresholds [ %d(%d), %d(%d), %d(%d), %d(%d) ]\n",
 219                 sensor->thrs_fan_boost.temp, sensor->thrs_fan_boost.hysteresis,
 220                 sensor->thrs_down_clock.temp,
 221                 sensor->thrs_down_clock.hysteresis,
 222                 sensor->thrs_critical.temp, sensor->thrs_critical.hysteresis,
 223                 sensor->thrs_shutdown.temp, sensor->thrs_shutdown.hysteresis);
 224
 225         alarm_timer_callback(&priv->sensor.therm_poll_alarm);
 226 }
 227
 228 int
 229 nouveau_therm_sensor_ctor(struct nouveau_therm *therm)
 230 {
 231         struct nouveau_therm_priv *priv = (void *)therm;
 232         struct nouveau_bios *bios = nouveau_bios(therm);
 233
 234         nouveau_alarm_init(&priv->sensor.therm_poll_alarm, alarm_timer_callback);
 235
 236         nouveau_therm_temp_set_defaults(therm);
 237         if (nvbios_therm_sensor_parse(bios, NVBIOS_THERM_DOMAIN_CORE,
 238                                       &priv->bios_sensor))
 239                 nv_error(therm, "nvbios_therm_sensor_parse failed\n");
 240         nouveau_therm_temp_safety_checks(therm);
 241
 242         return 0;
 243 }