drivers/gpu/drm/nouveau/nvkm/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 #include "priv.h"
  25
  26 static void
  27 nvkm_therm_temp_set_defaults(struct nvkm_therm *obj)
  28 {
  29         struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base);
  30
  31         therm->bios_sensor.offset_constant = 0;
  32
  33         therm->bios_sensor.thrs_fan_boost.temp = 90;
  34         therm->bios_sensor.thrs_fan_boost.hysteresis = 3;
  35
  36         therm->bios_sensor.thrs_down_clock.temp = 95;
  37         therm->bios_sensor.thrs_down_clock.hysteresis = 3;
  38
  39         therm->bios_sensor.thrs_critical.temp = 105;
  40         therm->bios_sensor.thrs_critical.hysteresis = 5;
  41
  42         therm->bios_sensor.thrs_shutdown.temp = 135;
  43         therm->bios_sensor.thrs_shutdown.hysteresis = 5; /*not that it matters */
  44 }
  45
  46
  47 static void
  48 nvkm_therm_temp_safety_checks(struct nvkm_therm *obj)
  49 {
  50         struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base);
  51         struct nvbios_therm_sensor *s = &therm->bios_sensor;
  52
  53         /* enforce a minimum hysteresis on thresholds */
  54         s->thrs_fan_boost.hysteresis = max_t(u8, s->thrs_fan_boost.hysteresis, 2);
  55         s->thrs_down_clock.hysteresis = max_t(u8, s->thrs_down_clock.hysteresis, 2);
  56         s->thrs_critical.hysteresis = max_t(u8, s->thrs_critical.hysteresis, 2);
  57         s->thrs_shutdown.hysteresis = max_t(u8, s->thrs_shutdown.hysteresis, 2);
  58 }
  59
  60 /* must be called with alarm_program_lock taken ! */
  61 void
  62 nvkm_therm_sensor_set_threshold_state(struct nvkm_therm *obj,
  63                                       enum nvkm_therm_thrs thrs,
  64                                       enum nvkm_therm_thrs_state st)
  65 {
  66         struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base);
  67         therm->sensor.alarm_state[thrs] = st;
  68 }
  69
  70 /* must be called with alarm_program_lock taken ! */
  71 enum nvkm_therm_thrs_state
  72 nvkm_therm_sensor_get_threshold_state(struct nvkm_therm *obj,
  73                                       enum nvkm_therm_thrs thrs)
  74 {
  75         struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base);
  76         return therm->sensor.alarm_state[thrs];
  77 }
  78
  79 static void
  80 nv_poweroff_work(struct work_struct *work)
  81 {
  82         orderly_poweroff(true);
  83         kfree(work);
  84 }
  85
  86 void
  87 nvkm_therm_sensor_event(struct nvkm_therm *obj, enum nvkm_therm_thrs thrs,
  88                         enum nvkm_therm_thrs_direction dir)
  89 {
  90         struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base);
  91         struct nvkm_subdev *subdev = &therm->base.subdev;
  92         bool active;
  93         const char *thresolds[] = {
  94                 "fanboost", "downclock", "critical", "shutdown"
  95         };
  96         int temperature = therm->base.temp_get(&therm->base);
  97
  98         if (thrs < 0 || thrs > 3)
  99                 return;
 100
 101         if (dir == NVKM_THERM_THRS_FALLING)
 102                 nvkm_info(subdev,
 103                           "temperature (%i C) went below the '%s' threshold\n",
 104                           temperature, thresolds[thrs]);
 105         else
 106                 nvkm_info(subdev, "temperature (%i C) hit the '%s' threshold\n",
 107                           temperature, thresolds[thrs]);
 108
 109         active = (dir == NVKM_THERM_THRS_RISING);
 110         switch (thrs) {
 111         case NVKM_THERM_THRS_FANBOOST:
 112                 if (active) {
 113                         nvkm_therm_fan_set(&therm->base, true, 100);
 114                         nvkm_therm_fan_mode(&therm->base, NVKM_THERM_CTRL_AUTO);
 115                 }
 116                 break;
 117         case NVKM_THERM_THRS_DOWNCLOCK:
 118                 if (therm->emergency.downclock)
 119                         therm->emergency.downclock(&therm->base, active);
 120                 break;
 121         case NVKM_THERM_THRS_CRITICAL:
 122                 if (therm->emergency.pause)
 123                         therm->emergency.pause(&therm->base, active);
 124                 break;
 125         case NVKM_THERM_THRS_SHUTDOWN:
 126                 if (active) {
 127                         struct work_struct *work;
 128
 129                         work = kmalloc(sizeof(*work), GFP_ATOMIC);
 130                         if (work) {
 131                                 INIT_WORK(work, nv_poweroff_work);
 132                                 schedule_work(work);
 133                         }
 134                 }
 135                 break;
 136         case NVKM_THERM_THRS_NR:
 137                 break;
 138         }
 139
 140 }
 141
 142 /* must be called with alarm_program_lock taken ! */
 143 static void
 144 nvkm_therm_threshold_hyst_polling(struct nvkm_therm *therm,
 145                                   const struct nvbios_therm_threshold *thrs,
 146                                   enum nvkm_therm_thrs thrs_name)
 147 {
 148         enum nvkm_therm_thrs_direction direction;
 149         enum nvkm_therm_thrs_state prev_state, new_state;
 150         int temp = therm->temp_get(therm);
 151
 152         prev_state = nvkm_therm_sensor_get_threshold_state(therm, thrs_name);
 153
 154         if (temp >= thrs->temp && prev_state == NVKM_THERM_THRS_LOWER) {
 155                 direction = NVKM_THERM_THRS_RISING;
 156                 new_state = NVKM_THERM_THRS_HIGHER;
 157         } else if (temp <= thrs->temp - thrs->hysteresis &&
 158                         prev_state == NVKM_THERM_THRS_HIGHER) {
 159                 direction = NVKM_THERM_THRS_FALLING;
 160                 new_state = NVKM_THERM_THRS_LOWER;
 161         } else
 162                 return; /* nothing to do */
 163
 164         nvkm_therm_sensor_set_threshold_state(therm, thrs_name, new_state);
 165         nvkm_therm_sensor_event(therm, thrs_name, direction);
 166 }
 167
 168 static void
 169 alarm_timer_callback(struct nvkm_alarm *alarm)
 170 {
 171         struct nvkm_therm_priv *therm =
 172         container_of(alarm, struct nvkm_therm_priv, sensor.therm_poll_alarm);
 173         struct nvbios_therm_sensor *sensor = &therm->bios_sensor;
 174         struct nvkm_timer *tmr = nvkm_timer(therm);
 175         unsigned long flags;
 176
 177         spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags);
 178
 179         nvkm_therm_threshold_hyst_polling(&therm->base, &sensor->thrs_fan_boost,
 180                                           NVKM_THERM_THRS_FANBOOST);
 181
 182         nvkm_therm_threshold_hyst_polling(&therm->base,
 183                                           &sensor->thrs_down_clock,
 184                                           NVKM_THERM_THRS_DOWNCLOCK);
 185
 186         nvkm_therm_threshold_hyst_polling(&therm->base, &sensor->thrs_critical,
 187                                           NVKM_THERM_THRS_CRITICAL);
 188
 189         nvkm_therm_threshold_hyst_polling(&therm->base, &sensor->thrs_shutdown,
 190                                           NVKM_THERM_THRS_SHUTDOWN);
 191
 192         spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags);
 193
 194         /* schedule the next poll in one second */
 195         if (therm->base.temp_get(&therm->base) >= 0 && list_empty(&alarm->head))
 196                 tmr->alarm(tmr, 1000000000ULL, alarm);
 197 }
 198
 199 void
 200 nvkm_therm_program_alarms_polling(struct nvkm_therm *obj)
 201 {
 202         struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base);
 203         struct nvbios_therm_sensor *sensor = &therm->bios_sensor;
 204
 205         nvkm_debug(&therm->base.subdev,
 206                    "programmed thresholds [ %d(%d), %d(%d), %d(%d), %d(%d) ]\n",
 207                    sensor->thrs_fan_boost.temp,
 208                    sensor->thrs_fan_boost.hysteresis,
 209                    sensor->thrs_down_clock.temp,
 210                    sensor->thrs_down_clock.hysteresis,
 211                    sensor->thrs_critical.temp,
 212                    sensor->thrs_critical.hysteresis,
 213                    sensor->thrs_shutdown.temp,
 214                    sensor->thrs_shutdown.hysteresis);
 215
 216         alarm_timer_callback(&therm->sensor.therm_poll_alarm);
 217 }
 218
 219 int
 220 nvkm_therm_sensor_init(struct nvkm_therm *obj)
 221 {
 222         struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base);
 223         therm->sensor.program_alarms(&therm->base);
 224         return 0;
 225 }
 226
 227 int
 228 nvkm_therm_sensor_fini(struct nvkm_therm *obj, bool suspend)
 229 {
 230         struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base);
 231         struct nvkm_timer *tmr = nvkm_timer(therm);
 232
 233         if (suspend)
 234                 tmr->alarm_cancel(tmr, &therm->sensor.therm_poll_alarm);
 235         return 0;
 236 }
 237
 238 void
 239 nvkm_therm_sensor_preinit(struct nvkm_therm *therm)
 240 {
 241         const char *sensor_avail = "yes";
 242
 243         if (therm->temp_get(therm) < 0)
 244                 sensor_avail = "no";
 245
 246         nvkm_debug(&therm->subdev, "internal sensor: %s\n", sensor_avail);
 247 }
 248
 249 int
 250 nvkm_therm_sensor_ctor(struct nvkm_therm *obj)
 251 {
 252         struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base);
 253         struct nvkm_subdev *subdev = &therm->base.subdev;
 254         struct nvkm_bios *bios = nvkm_bios(therm);
 255
 256         nvkm_alarm_init(&therm->sensor.therm_poll_alarm, alarm_timer_callback);
 257
 258         nvkm_therm_temp_set_defaults(&therm->base);
 259         if (nvbios_therm_sensor_parse(bios, NVBIOS_THERM_DOMAIN_CORE,
 260                                       &therm->bios_sensor))
 261                 nvkm_error(subdev, "nvbios_therm_sensor_parse failed\n");
 262         nvkm_therm_temp_safety_checks(&therm->base);
 263
 264         return 0;
 265 }