drivers/gpu/drm/nouveau/core/subdev/therm/base.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 <core/object.h>
  26 #include <core/device.h>
  27
  28 #include <subdev/bios.h>
  29
  30 #include "priv.h"
  31
  32 static int
  33 nouveau_therm_update_trip(struct nouveau_therm *therm)
  34 {
  35         struct nouveau_therm_priv *priv = (void *)therm;
  36         struct nouveau_therm_trip_point *trip = priv->fan->bios.trip,
  37                                         *cur_trip = NULL,
  38                                         *last_trip = priv->last_trip;
  39         u8  temp = therm->temp_get(therm);
  40         u16 duty, i;
  41
  42         /* look for the trip point corresponding to the current temperature */
  43         cur_trip = NULL;
  44         for (i = 0; i < priv->fan->bios.nr_fan_trip; i++) {
  45                 if (temp >= trip[i].temp)
  46                         cur_trip = &trip[i];
  47         }
  48
  49         /* account for the hysteresis cycle */
  50         if (last_trip && temp <= (last_trip->temp) &&
  51             temp > (last_trip->temp - last_trip->hysteresis))
  52                 cur_trip = last_trip;
  53
  54         if (cur_trip) {
  55                 duty = cur_trip->fan_duty;
  56                 priv->last_trip = cur_trip;
  57         } else {
  58                 duty = 0;
  59                 priv->last_trip = NULL;
  60         }
  61
  62         return duty;
  63 }
  64
  65 static int
  66 nouveau_therm_update_linear(struct nouveau_therm *therm)
  67 {
  68         struct nouveau_therm_priv *priv = (void *)therm;
  69         u8  linear_min_temp = priv->fan->bios.linear_min_temp;
  70         u8  linear_max_temp = priv->fan->bios.linear_max_temp;
  71         u8  temp = therm->temp_get(therm);
  72         u16 duty;
  73
  74         /* handle the non-linear part first */
  75         if (temp < linear_min_temp)
  76                 return priv->fan->bios.min_duty;
  77         else if (temp > linear_max_temp)
  78                 return priv->fan->bios.max_duty;
  79
  80         /* we are in the linear zone */
  81         duty  = (temp - linear_min_temp);
  82         duty *= (priv->fan->bios.max_duty - priv->fan->bios.min_duty);
  83         duty /= (linear_max_temp - linear_min_temp);
  84         duty += priv->fan->bios.min_duty;
  85
  86         return duty;
  87 }
  88
  89 static void
  90 nouveau_therm_update(struct nouveau_therm *therm, int mode)
  91 {
  92         struct nouveau_timer *ptimer = nouveau_timer(therm);
  93         struct nouveau_therm_priv *priv = (void *)therm;
  94         unsigned long flags;
  95         int duty;
  96
  97         spin_lock_irqsave(&priv->lock, flags);
  98         if (mode < 0)
  99                 mode = priv->mode;
 100         priv->mode = mode;
 101
 102         switch (mode) {
 103         case NOUVEAU_THERM_CTRL_MANUAL:
 104                 duty = nouveau_therm_fan_get(therm);
 105                 if (duty < 0)
 106                         duty = 100;
 107                 break;
 108         case NOUVEAU_THERM_CTRL_AUTO:
 109                 if (priv->fan->bios.nr_fan_trip)
 110                         duty = nouveau_therm_update_trip(therm);
 111                 else
 112                         duty = nouveau_therm_update_linear(therm);
 113                 break;
 114         case NOUVEAU_THERM_CTRL_NONE:
 115         default:
 116                 goto done;
 117         }
 118
 119         nv_debug(therm, "FAN target request: %d%%\n", duty);
 120         nouveau_therm_fan_set(therm, (mode != NOUVEAU_THERM_CTRL_AUTO), duty);
 121
 122 done:
 123         if (list_empty(&priv->alarm.head) && (mode == NOUVEAU_THERM_CTRL_AUTO))
 124                 ptimer->alarm(ptimer, 1000000000ULL, &priv->alarm);
 125         spin_unlock_irqrestore(&priv->lock, flags);
 126 }
 127
 128 static void
 129 nouveau_therm_alarm(struct nouveau_alarm *alarm)
 130 {
 131         struct nouveau_therm_priv *priv =
 132                container_of(alarm, struct nouveau_therm_priv, alarm);
 133         nouveau_therm_update(&priv->base, -1);
 134 }
 135
 136 int
 137 nouveau_therm_fan_mode(struct nouveau_therm *therm, int mode)
 138 {
 139         struct nouveau_therm_priv *priv = (void *)therm;
 140         struct nouveau_device *device = nv_device(therm);
 141         static const char *name[] = {
 142                 "disabled",
 143                 "manual",
 144                 "automatic"
 145         };
 146
 147         /* The default PDAEMON ucode interferes with fan management */
 148         if ((mode >= ARRAY_SIZE(name)) ||
 149             (mode != NOUVEAU_THERM_CTRL_NONE && device->card_type >= NV_C0))
 150                 return -EINVAL;
 151
 152         /* do not allow automatic fan management if the thermal sensor is
 153          * not available */
 154         if (priv->mode == 2 && therm->temp_get(therm) < 0)
 155                 return -EINVAL;
 156
 157         if (priv->mode == mode)
 158                 return 0;
 159
 160         nv_info(therm, "fan management: %s\n", name[mode]);
 161         nouveau_therm_update(therm, mode);
 162         return 0;
 163 }
 164
 165 int
 166 nouveau_therm_attr_get(struct nouveau_therm *therm,
 167                        enum nouveau_therm_attr_type type)
 168 {
 169         struct nouveau_therm_priv *priv = (void *)therm;
 170
 171         switch (type) {
 172         case NOUVEAU_THERM_ATTR_FAN_MIN_DUTY:
 173                 return priv->fan->bios.min_duty;
 174         case NOUVEAU_THERM_ATTR_FAN_MAX_DUTY:
 175                 return priv->fan->bios.max_duty;
 176         case NOUVEAU_THERM_ATTR_FAN_MODE:
 177                 return priv->mode;
 178         case NOUVEAU_THERM_ATTR_THRS_FAN_BOOST:
 179                 return priv->bios_sensor.thrs_fan_boost.temp;
 180         case NOUVEAU_THERM_ATTR_THRS_FAN_BOOST_HYST:
 181                 return priv->bios_sensor.thrs_fan_boost.hysteresis;
 182         case NOUVEAU_THERM_ATTR_THRS_DOWN_CLK:
 183                 return priv->bios_sensor.thrs_down_clock.temp;
 184         case NOUVEAU_THERM_ATTR_THRS_DOWN_CLK_HYST:
 185                 return priv->bios_sensor.thrs_down_clock.hysteresis;
 186         case NOUVEAU_THERM_ATTR_THRS_CRITICAL:
 187                 return priv->bios_sensor.thrs_critical.temp;
 188         case NOUVEAU_THERM_ATTR_THRS_CRITICAL_HYST:
 189                 return priv->bios_sensor.thrs_critical.hysteresis;
 190         case NOUVEAU_THERM_ATTR_THRS_SHUTDOWN:
 191                 return priv->bios_sensor.thrs_shutdown.temp;
 192         case NOUVEAU_THERM_ATTR_THRS_SHUTDOWN_HYST:
 193                 return priv->bios_sensor.thrs_shutdown.hysteresis;
 194         }
 195
 196         return -EINVAL;
 197 }
 198
 199 int
 200 nouveau_therm_attr_set(struct nouveau_therm *therm,
 201                        enum nouveau_therm_attr_type type, int value)
 202 {
 203         struct nouveau_therm_priv *priv = (void *)therm;
 204
 205         switch (type) {
 206         case NOUVEAU_THERM_ATTR_FAN_MIN_DUTY:
 207                 if (value < 0)
 208                         value = 0;
 209                 if (value > priv->fan->bios.max_duty)
 210                         value = priv->fan->bios.max_duty;
 211                 priv->fan->bios.min_duty = value;
 212                 return 0;
 213         case NOUVEAU_THERM_ATTR_FAN_MAX_DUTY:
 214                 if (value < 0)
 215                         value = 0;
 216                 if (value < priv->fan->bios.min_duty)
 217                         value = priv->fan->bios.min_duty;
 218                 priv->fan->bios.max_duty = value;
 219                 return 0;
 220         case NOUVEAU_THERM_ATTR_FAN_MODE:
 221                 return nouveau_therm_fan_mode(therm, value);
 222         case NOUVEAU_THERM_ATTR_THRS_FAN_BOOST:
 223                 priv->bios_sensor.thrs_fan_boost.temp = value;
 224                 priv->sensor.program_alarms(therm);
 225                 return 0;
 226         case NOUVEAU_THERM_ATTR_THRS_FAN_BOOST_HYST:
 227                 priv->bios_sensor.thrs_fan_boost.hysteresis = value;
 228                 priv->sensor.program_alarms(therm);
 229                 return 0;
 230         case NOUVEAU_THERM_ATTR_THRS_DOWN_CLK:
 231                 priv->bios_sensor.thrs_down_clock.temp = value;
 232                 priv->sensor.program_alarms(therm);
 233                 return 0;
 234         case NOUVEAU_THERM_ATTR_THRS_DOWN_CLK_HYST:
 235                 priv->bios_sensor.thrs_down_clock.hysteresis = value;
 236                 priv->sensor.program_alarms(therm);
 237                 return 0;
 238         case NOUVEAU_THERM_ATTR_THRS_CRITICAL:
 239                 priv->bios_sensor.thrs_critical.temp = value;
 240                 priv->sensor.program_alarms(therm);
 241                 return 0;
 242         case NOUVEAU_THERM_ATTR_THRS_CRITICAL_HYST:
 243                 priv->bios_sensor.thrs_critical.hysteresis = value;
 244                 priv->sensor.program_alarms(therm);
 245                 return 0;
 246         case NOUVEAU_THERM_ATTR_THRS_SHUTDOWN:
 247                 priv->bios_sensor.thrs_shutdown.temp = value;
 248                 priv->sensor.program_alarms(therm);
 249                 return 0;
 250         case NOUVEAU_THERM_ATTR_THRS_SHUTDOWN_HYST:
 251                 priv->bios_sensor.thrs_shutdown.hysteresis = value;
 252                 priv->sensor.program_alarms(therm);
 253                 return 0;
 254         }
 255
 256         return -EINVAL;
 257 }
 258
 259 int
 260 _nouveau_therm_init(struct nouveau_object *object)
 261 {
 262         struct nouveau_therm *therm = (void *)object;
 263         struct nouveau_therm_priv *priv = (void *)therm;
 264         int ret;
 265
 266         ret = nouveau_subdev_init(&therm->base);
 267         if (ret)
 268                 return ret;
 269
 270         if (priv->suspend >= 0)
 271                 nouveau_therm_fan_mode(therm, priv->suspend);
 272         priv->sensor.program_alarms(therm);
 273         return 0;
 274 }
 275
 276 int
 277 _nouveau_therm_fini(struct nouveau_object *object, bool suspend)
 278 {
 279         struct nouveau_therm *therm = (void *)object;
 280         struct nouveau_therm_priv *priv = (void *)therm;
 281
 282         if (suspend) {
 283                 priv->suspend = priv->mode;
 284                 priv->mode = NOUVEAU_THERM_CTRL_NONE;
 285         }
 286
 287         return nouveau_subdev_fini(&therm->base, suspend);
 288 }
 289
 290 int
 291 nouveau_therm_create_(struct nouveau_object *parent,
 292                       struct nouveau_object *engine,
 293                       struct nouveau_oclass *oclass,
 294                       int length, void **pobject)
 295 {
 296         struct nouveau_therm_priv *priv;
 297         int ret;
 298
 299         ret = nouveau_subdev_create_(parent, engine, oclass, 0, "PTHERM",
 300                                      "therm", length, pobject);
 301         priv = *pobject;
 302         if (ret)
 303                 return ret;
 304
 305         nouveau_alarm_init(&priv->alarm, nouveau_therm_alarm);
 306         spin_lock_init(&priv->lock);
 307         spin_lock_init(&priv->sensor.alarm_program_lock);
 308
 309         priv->base.fan_get = nouveau_therm_fan_user_get;
 310         priv->base.fan_set = nouveau_therm_fan_user_set;
 311         priv->base.fan_sense = nouveau_therm_fan_sense;
 312         priv->base.attr_get = nouveau_therm_attr_get;
 313         priv->base.attr_set = nouveau_therm_attr_set;
 314         priv->mode = priv->suspend = -1; /* undefined */
 315         return 0;
 316 }
 317
 318 int
 319 nouveau_therm_preinit(struct nouveau_therm *therm)
 320 {
 321         nouveau_therm_sensor_ctor(therm);
 322         nouveau_therm_ic_ctor(therm);
 323         nouveau_therm_fan_ctor(therm);
 324
 325         nouveau_therm_fan_mode(therm, NOUVEAU_THERM_CTRL_NONE);
 326         nouveau_therm_sensor_preinit(therm);
 327         return 0;
 328 }
 329
 330 void
 331 _nouveau_therm_dtor(struct nouveau_object *object)
 332 {
 333         struct nouveau_therm_priv *priv = (void *)object;
 334         kfree(priv->fan);
 335         nouveau_subdev_destroy(&priv->base.base);
 336 }