kernel/drivers/gpu/drm/nouveau/nvkm/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 #include "priv.h"
  25
  26 int
  27 nvkm_therm_temp_get(struct nvkm_therm *therm)
  28 {
  29         if (therm->func->temp_get)
  30                 return therm->func->temp_get(therm);
  31         return -ENODEV;
  32 }
  33
  34 static int
  35 nvkm_therm_update_trip(struct nvkm_therm *therm)
  36 {
  37         struct nvbios_therm_trip_point *trip = therm->fan->bios.trip,
  38                                        *cur_trip = NULL,
  39                                        *last_trip = therm->last_trip;
  40         u8  temp = therm->func->temp_get(therm);
  41         u16 duty, i;
  42
  43         /* look for the trip point corresponding to the current temperature */
  44         cur_trip = NULL;
  45         for (i = 0; i < therm->fan->bios.nr_fan_trip; i++) {
  46                 if (temp >= trip[i].temp)
  47                         cur_trip = &trip[i];
  48         }
  49
  50         /* account for the hysteresis cycle */
  51         if (last_trip && temp <= (last_trip->temp) &&
  52             temp > (last_trip->temp - last_trip->hysteresis))
  53                 cur_trip = last_trip;
  54
  55         if (cur_trip) {
  56                 duty = cur_trip->fan_duty;
  57                 therm->last_trip = cur_trip;
  58         } else {
  59                 duty = 0;
  60                 therm->last_trip = NULL;
  61         }
  62
  63         return duty;
  64 }
  65
  66 static int
  67 nvkm_therm_update_linear(struct nvkm_therm *therm)
  68 {
  69         u8  linear_min_temp = therm->fan->bios.linear_min_temp;
  70         u8  linear_max_temp = therm->fan->bios.linear_max_temp;
  71         u8  temp = therm->func->temp_get(therm);
  72         u16 duty;
  73
  74         /* handle the non-linear part first */
  75         if (temp < linear_min_temp)
  76                 return therm->fan->bios.min_duty;
  77         else if (temp > linear_max_temp)
  78                 return therm->fan->bios.max_duty;
  79
  80         /* we are in the linear zone */
  81         duty  = (temp - linear_min_temp);
  82         duty *= (therm->fan->bios.max_duty - therm->fan->bios.min_duty);
  83         duty /= (linear_max_temp - linear_min_temp);
  84         duty += therm->fan->bios.min_duty;
  85         return duty;
  86 }
  87
  88 static void
  89 nvkm_therm_update(struct nvkm_therm *therm, int mode)
  90 {
  91         struct nvkm_subdev *subdev = &therm->subdev;
  92         struct nvkm_timer *tmr = subdev->device->timer;
  93         unsigned long flags;
  94         bool immd = true;
  95         bool poll = true;
  96         int duty = -1;
  97
  98         spin_lock_irqsave(&therm->lock, flags);
  99         if (mode < 0)
 100                 mode = therm->mode;
 101         therm->mode = mode;
 102
 103         switch (mode) {
 104         case NVKM_THERM_CTRL_MANUAL:
 105                 nvkm_timer_alarm_cancel(tmr, &therm->alarm);
 106                 duty = nvkm_therm_fan_get(therm);
 107                 if (duty < 0)
 108                         duty = 100;
 109                 poll = false;
 110                 break;
 111         case NVKM_THERM_CTRL_AUTO:
 112                 switch(therm->fan->bios.fan_mode) {
 113                 case NVBIOS_THERM_FAN_TRIP:
 114                         duty = nvkm_therm_update_trip(therm);
 115                         break;
 116                 case NVBIOS_THERM_FAN_LINEAR:
 117                         duty = nvkm_therm_update_linear(therm);
 118                         break;
 119                 case NVBIOS_THERM_FAN_OTHER:
 120                         if (therm->cstate)
 121                                 duty = therm->cstate;
 122                         poll = false;
 123                         break;
 124                 }
 125                 immd = false;
 126                 break;
 127         case NVKM_THERM_CTRL_NONE:
 128         default:
 129                 nvkm_timer_alarm_cancel(tmr, &therm->alarm);
 130                 poll = false;
 131         }
 132
 133         if (list_empty(&therm->alarm.head) && poll)
 134                 nvkm_timer_alarm(tmr, 1000000000ULL, &therm->alarm);
 135         spin_unlock_irqrestore(&therm->lock, flags);
 136
 137         if (duty >= 0) {
 138                 nvkm_debug(subdev, "FAN target request: %d%%\n", duty);
 139                 nvkm_therm_fan_set(therm, immd, duty);
 140         }
 141 }
 142
 143 int
 144 nvkm_therm_cstate(struct nvkm_therm *therm, int fan, int dir)
 145 {
 146         struct nvkm_subdev *subdev = &therm->subdev;
 147         if (!dir || (dir < 0 && fan < therm->cstate) ||
 148                     (dir > 0 && fan > therm->cstate)) {
 149                 nvkm_debug(subdev, "default fan speed -> %d%%\n", fan);
 150                 therm->cstate = fan;
 151                 nvkm_therm_update(therm, -1);
 152         }
 153         return 0;
 154 }
 155
 156 static void
 157 nvkm_therm_alarm(struct nvkm_alarm *alarm)
 158 {
 159         struct nvkm_therm *therm =
 160                container_of(alarm, struct nvkm_therm, alarm);
 161         nvkm_therm_update(therm, -1);
 162 }
 163
 164 int
 165 nvkm_therm_fan_mode(struct nvkm_therm *therm, int mode)
 166 {
 167         struct nvkm_subdev *subdev = &therm->subdev;
 168         struct nvkm_device *device = subdev->device;
 169         static const char *name[] = {
 170                 "disabled",
 171                 "manual",
 172                 "automatic"
 173         };
 174
 175         /* The default PPWR ucode on fermi interferes with fan management */
 176         if ((mode >= ARRAY_SIZE(name)) ||
 177             (mode != NVKM_THERM_CTRL_NONE && device->card_type >= NV_C0 &&
 178              !device->pmu))
 179                 return -EINVAL;
 180
 181         /* do not allow automatic fan management if the thermal sensor is
 182          * not available */
 183         if (mode == NVKM_THERM_CTRL_AUTO &&
 184             therm->func->temp_get(therm) < 0)
 185                 return -EINVAL;
 186
 187         if (therm->mode == mode)
 188                 return 0;
 189
 190         nvkm_debug(subdev, "fan management: %s\n", name[mode]);
 191         nvkm_therm_update(therm, mode);
 192         return 0;
 193 }
 194
 195 int
 196 nvkm_therm_attr_get(struct nvkm_therm *therm, enum nvkm_therm_attr_type type)
 197 {
 198         switch (type) {
 199         case NVKM_THERM_ATTR_FAN_MIN_DUTY:
 200                 return therm->fan->bios.min_duty;
 201         case NVKM_THERM_ATTR_FAN_MAX_DUTY:
 202                 return therm->fan->bios.max_duty;
 203         case NVKM_THERM_ATTR_FAN_MODE:
 204                 return therm->mode;
 205         case NVKM_THERM_ATTR_THRS_FAN_BOOST:
 206                 return therm->bios_sensor.thrs_fan_boost.temp;
 207         case NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST:
 208                 return therm->bios_sensor.thrs_fan_boost.hysteresis;
 209         case NVKM_THERM_ATTR_THRS_DOWN_CLK:
 210                 return therm->bios_sensor.thrs_down_clock.temp;
 211         case NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST:
 212                 return therm->bios_sensor.thrs_down_clock.hysteresis;
 213         case NVKM_THERM_ATTR_THRS_CRITICAL:
 214                 return therm->bios_sensor.thrs_critical.temp;
 215         case NVKM_THERM_ATTR_THRS_CRITICAL_HYST:
 216                 return therm->bios_sensor.thrs_critical.hysteresis;
 217         case NVKM_THERM_ATTR_THRS_SHUTDOWN:
 218                 return therm->bios_sensor.thrs_shutdown.temp;
 219         case NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST:
 220                 return therm->bios_sensor.thrs_shutdown.hysteresis;
 221         }
 222
 223         return -EINVAL;
 224 }
 225
 226 int
 227 nvkm_therm_attr_set(struct nvkm_therm *therm,
 228                     enum nvkm_therm_attr_type type, int value)
 229 {
 230         switch (type) {
 231         case NVKM_THERM_ATTR_FAN_MIN_DUTY:
 232                 if (value < 0)
 233                         value = 0;
 234                 if (value > therm->fan->bios.max_duty)
 235                         value = therm->fan->bios.max_duty;
 236                 therm->fan->bios.min_duty = value;
 237                 return 0;
 238         case NVKM_THERM_ATTR_FAN_MAX_DUTY:
 239                 if (value < 0)
 240                         value = 0;
 241                 if (value < therm->fan->bios.min_duty)
 242                         value = therm->fan->bios.min_duty;
 243                 therm->fan->bios.max_duty = value;
 244                 return 0;
 245         case NVKM_THERM_ATTR_FAN_MODE:
 246                 return nvkm_therm_fan_mode(therm, value);
 247         case NVKM_THERM_ATTR_THRS_FAN_BOOST:
 248                 therm->bios_sensor.thrs_fan_boost.temp = value;
 249                 therm->func->program_alarms(therm);
 250                 return 0;
 251         case NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST:
 252                 therm->bios_sensor.thrs_fan_boost.hysteresis = value;
 253                 therm->func->program_alarms(therm);
 254                 return 0;
 255         case NVKM_THERM_ATTR_THRS_DOWN_CLK:
 256                 therm->bios_sensor.thrs_down_clock.temp = value;
 257                 therm->func->program_alarms(therm);
 258                 return 0;
 259         case NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST:
 260                 therm->bios_sensor.thrs_down_clock.hysteresis = value;
 261                 therm->func->program_alarms(therm);
 262                 return 0;
 263         case NVKM_THERM_ATTR_THRS_CRITICAL:
 264                 therm->bios_sensor.thrs_critical.temp = value;
 265                 therm->func->program_alarms(therm);
 266                 return 0;
 267         case NVKM_THERM_ATTR_THRS_CRITICAL_HYST:
 268                 therm->bios_sensor.thrs_critical.hysteresis = value;
 269                 therm->func->program_alarms(therm);
 270                 return 0;
 271         case NVKM_THERM_ATTR_THRS_SHUTDOWN:
 272                 therm->bios_sensor.thrs_shutdown.temp = value;
 273                 therm->func->program_alarms(therm);
 274                 return 0;
 275         case NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST:
 276                 therm->bios_sensor.thrs_shutdown.hysteresis = value;
 277                 therm->func->program_alarms(therm);
 278                 return 0;
 279         }
 280
 281         return -EINVAL;
 282 }
 283
 284 static void
 285 nvkm_therm_intr(struct nvkm_subdev *subdev)
 286 {
 287         struct nvkm_therm *therm = nvkm_therm(subdev);
 288         if (therm->func->intr)
 289                 therm->func->intr(therm);
 290 }
 291
 292 static int
 293 nvkm_therm_fini(struct nvkm_subdev *subdev, bool suspend)
 294 {
 295         struct nvkm_therm *therm = nvkm_therm(subdev);
 296
 297         if (therm->func->fini)
 298                 therm->func->fini(therm);
 299
 300         nvkm_therm_fan_fini(therm, suspend);
 301         nvkm_therm_sensor_fini(therm, suspend);
 302
 303         if (suspend) {
 304                 therm->suspend = therm->mode;
 305                 therm->mode = NVKM_THERM_CTRL_NONE;
 306         }
 307
 308         return 0;
 309 }
 310
 311 static int
 312 nvkm_therm_oneinit(struct nvkm_subdev *subdev)
 313 {
 314         struct nvkm_therm *therm = nvkm_therm(subdev);
 315         nvkm_therm_sensor_ctor(therm);
 316         nvkm_therm_ic_ctor(therm);
 317         nvkm_therm_fan_ctor(therm);
 318         nvkm_therm_fan_mode(therm, NVKM_THERM_CTRL_AUTO);
 319         nvkm_therm_sensor_preinit(therm);
 320         return 0;
 321 }
 322
 323 static int
 324 nvkm_therm_init(struct nvkm_subdev *subdev)
 325 {
 326         struct nvkm_therm *therm = nvkm_therm(subdev);
 327
 328         therm->func->init(therm);
 329
 330         if (therm->suspend >= 0) {
 331                 /* restore the pwm value only when on manual or auto mode */
 332                 if (therm->suspend > 0)
 333                         nvkm_therm_fan_set(therm, true, therm->fan->percent);
 334
 335                 nvkm_therm_fan_mode(therm, therm->suspend);
 336         }
 337
 338         nvkm_therm_sensor_init(therm);
 339         nvkm_therm_fan_init(therm);
 340         return 0;
 341 }
 342
 343 static void *
 344 nvkm_therm_dtor(struct nvkm_subdev *subdev)
 345 {
 346         struct nvkm_therm *therm = nvkm_therm(subdev);
 347         kfree(therm->fan);
 348         return therm;
 349 }
 350
 351 static const struct nvkm_subdev_func
 352 nvkm_therm = {
 353         .dtor = nvkm_therm_dtor,
 354         .oneinit = nvkm_therm_oneinit,
 355         .init = nvkm_therm_init,
 356         .fini = nvkm_therm_fini,
 357         .intr = nvkm_therm_intr,
 358 };
 359
 360 int
 361 nvkm_therm_new_(const struct nvkm_therm_func *func, struct nvkm_device *device,
 362                 int index, struct nvkm_therm **ptherm)
 363 {
 364         struct nvkm_therm *therm;
 365
 366         if (!(therm = *ptherm = kzalloc(sizeof(*therm), GFP_KERNEL)))
 367                 return -ENOMEM;
 368
 369         nvkm_subdev_ctor(&nvkm_therm, device, index, 0, &therm->subdev);
 370         therm->func = func;
 371
 372         nvkm_alarm_init(&therm->alarm, nvkm_therm_alarm);
 373         spin_lock_init(&therm->lock);
 374         spin_lock_init(&therm->sensor.alarm_program_lock);
 375
 376         therm->fan_get = nvkm_therm_fan_user_get;
 377         therm->fan_set = nvkm_therm_fan_user_set;
 378         therm->attr_get = nvkm_therm_attr_get;
 379         therm->attr_set = nvkm_therm_attr_set;
 380         therm->mode = therm->suspend = -1; /* undefined */
 381         return 0;
 382 }