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_compute_linear_duty(struct nvkm_therm *therm, u8 linear_min_temp,
  68                                u8 linear_max_temp)
  69 {
  70         u8  temp = therm->func->temp_get(therm);
  71         u16 duty;
  72
  73         /* handle the non-linear part first */
  74         if (temp < linear_min_temp)
  75                 return therm->fan->bios.min_duty;
  76         else if (temp > linear_max_temp)
  77                 return therm->fan->bios.max_duty;
  78
  79         /* we are in the linear zone */
  80         duty  = (temp - linear_min_temp);
  81         duty *= (therm->fan->bios.max_duty - therm->fan->bios.min_duty);
  82         duty /= (linear_max_temp - linear_min_temp);
  83         duty += therm->fan->bios.min_duty;
  84         return duty;
  85 }
  86
  87 static int
  88 nvkm_therm_update_linear(struct nvkm_therm *therm)
  89 {
  90         u8  min = therm->fan->bios.linear_min_temp;
  91         u8  max = therm->fan->bios.linear_max_temp;
  92         return nvkm_therm_compute_linear_duty(therm, min, max);
  93 }
  94
  95 static int
  96 nvkm_therm_update_linear_fallback(struct nvkm_therm *therm)
  97 {
  98         u8 max = therm->bios_sensor.thrs_fan_boost.temp;
  99         return nvkm_therm_compute_linear_duty(therm, 30, max);
 100 }
 101
 102 static void
 103 nvkm_therm_update(struct nvkm_therm *therm, int mode)
 104 {
 105         struct nvkm_subdev *subdev = &therm->subdev;
 106         struct nvkm_timer *tmr = subdev->device->timer;
 107         unsigned long flags;
 108         bool immd = true;
 109         bool poll = true;
 110         int duty = -1;
 111
 112         spin_lock_irqsave(&therm->lock, flags);
 113         if (mode < 0)
 114                 mode = therm->mode;
 115         therm->mode = mode;
 116
 117         switch (mode) {
 118         case NVKM_THERM_CTRL_MANUAL:
 119                 nvkm_timer_alarm_cancel(tmr, &therm->alarm);
 120                 duty = nvkm_therm_fan_get(therm);
 121                 if (duty < 0)
 122                         duty = 100;
 123                 poll = false;
 124                 break;
 125         case NVKM_THERM_CTRL_AUTO:
 126                 switch(therm->fan->bios.fan_mode) {
 127                 case NVBIOS_THERM_FAN_TRIP:
 128                         duty = nvkm_therm_update_trip(therm);
 129                         break;
 130                 case NVBIOS_THERM_FAN_LINEAR:
 131                         duty = nvkm_therm_update_linear(therm);
 132                         break;
 133                 case NVBIOS_THERM_FAN_OTHER:
 134                         if (therm->cstate)
 135                                 duty = therm->cstate;
 136                         else
 137                                 duty = nvkm_therm_update_linear_fallback(therm);
 138                         poll = false;
 139                         break;
 140                 }
 141                 immd = false;
 142                 break;
 143         case NVKM_THERM_CTRL_NONE:
 144         default:
 145                 nvkm_timer_alarm_cancel(tmr, &therm->alarm);
 146                 poll = false;
 147         }
 148
 149         if (list_empty(&therm->alarm.head) && poll)
 150                 nvkm_timer_alarm(tmr, 1000000000ULL, &therm->alarm);
 151         spin_unlock_irqrestore(&therm->lock, flags);
 152
 153         if (duty >= 0) {
 154                 nvkm_debug(subdev, "FAN target request: %d%%\n", duty);
 155                 nvkm_therm_fan_set(therm, immd, duty);
 156         }
 157 }
 158
 159 int
 160 nvkm_therm_cstate(struct nvkm_therm *therm, int fan, int dir)
 161 {
 162         struct nvkm_subdev *subdev = &therm->subdev;
 163         if (!dir || (dir < 0 && fan < therm->cstate) ||
 164                     (dir > 0 && fan > therm->cstate)) {
 165                 nvkm_debug(subdev, "default fan speed -> %d%%\n", fan);
 166                 therm->cstate = fan;
 167                 nvkm_therm_update(therm, -1);
 168         }
 169         return 0;
 170 }
 171
 172 static void
 173 nvkm_therm_alarm(struct nvkm_alarm *alarm)
 174 {
 175         struct nvkm_therm *therm =
 176                container_of(alarm, struct nvkm_therm, alarm);
 177         nvkm_therm_update(therm, -1);
 178 }
 179
 180 int
 181 nvkm_therm_fan_mode(struct nvkm_therm *therm, int mode)
 182 {
 183         struct nvkm_subdev *subdev = &therm->subdev;
 184         struct nvkm_device *device = subdev->device;
 185         static const char *name[] = {
 186                 "disabled",
 187                 "manual",
 188                 "automatic"
 189         };
 190
 191         /* The default PPWR ucode on fermi interferes with fan management */
 192         if ((mode >= ARRAY_SIZE(name)) ||
 193             (mode != NVKM_THERM_CTRL_NONE && device->card_type >= NV_C0 &&
 194              !device->pmu))
 195                 return -EINVAL;
 196
 197         /* do not allow automatic fan management if the thermal sensor is
 198          * not available */
 199         if (mode == NVKM_THERM_CTRL_AUTO &&
 200             therm->func->temp_get(therm) < 0)
 201                 return -EINVAL;
 202
 203         if (therm->mode == mode)
 204                 return 0;
 205
 206         nvkm_debug(subdev, "fan management: %s\n", name[mode]);
 207         nvkm_therm_update(therm, mode);
 208         return 0;
 209 }
 210
 211 int
 212 nvkm_therm_attr_get(struct nvkm_therm *therm, enum nvkm_therm_attr_type type)
 213 {
 214         switch (type) {
 215         case NVKM_THERM_ATTR_FAN_MIN_DUTY:
 216                 return therm->fan->bios.min_duty;
 217         case NVKM_THERM_ATTR_FAN_MAX_DUTY:
 218                 return therm->fan->bios.max_duty;
 219         case NVKM_THERM_ATTR_FAN_MODE:
 220                 return therm->mode;
 221         case NVKM_THERM_ATTR_THRS_FAN_BOOST:
 222                 return therm->bios_sensor.thrs_fan_boost.temp;
 223         case NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST:
 224                 return therm->bios_sensor.thrs_fan_boost.hysteresis;
 225         case NVKM_THERM_ATTR_THRS_DOWN_CLK:
 226                 return therm->bios_sensor.thrs_down_clock.temp;
 227         case NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST:
 228                 return therm->bios_sensor.thrs_down_clock.hysteresis;
 229         case NVKM_THERM_ATTR_THRS_CRITICAL:
 230                 return therm->bios_sensor.thrs_critical.temp;
 231         case NVKM_THERM_ATTR_THRS_CRITICAL_HYST:
 232                 return therm->bios_sensor.thrs_critical.hysteresis;
 233         case NVKM_THERM_ATTR_THRS_SHUTDOWN:
 234                 return therm->bios_sensor.thrs_shutdown.temp;
 235         case NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST:
 236                 return therm->bios_sensor.thrs_shutdown.hysteresis;
 237         }
 238
 239         return -EINVAL;
 240 }
 241
 242 int
 243 nvkm_therm_attr_set(struct nvkm_therm *therm,
 244                     enum nvkm_therm_attr_type type, int value)
 245 {
 246         switch (type) {
 247         case NVKM_THERM_ATTR_FAN_MIN_DUTY:
 248                 if (value < 0)
 249                         value = 0;
 250                 if (value > therm->fan->bios.max_duty)
 251                         value = therm->fan->bios.max_duty;
 252                 therm->fan->bios.min_duty = value;
 253                 return 0;
 254         case NVKM_THERM_ATTR_FAN_MAX_DUTY:
 255                 if (value < 0)
 256                         value = 0;
 257                 if (value < therm->fan->bios.min_duty)
 258                         value = therm->fan->bios.min_duty;
 259                 therm->fan->bios.max_duty = value;
 260                 return 0;
 261         case NVKM_THERM_ATTR_FAN_MODE:
 262                 return nvkm_therm_fan_mode(therm, value);
 263         case NVKM_THERM_ATTR_THRS_FAN_BOOST:
 264                 therm->bios_sensor.thrs_fan_boost.temp = value;
 265                 therm->func->program_alarms(therm);
 266                 return 0;
 267         case NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST:
 268                 therm->bios_sensor.thrs_fan_boost.hysteresis = value;
 269                 therm->func->program_alarms(therm);
 270                 return 0;
 271         case NVKM_THERM_ATTR_THRS_DOWN_CLK:
 272                 therm->bios_sensor.thrs_down_clock.temp = value;
 273                 therm->func->program_alarms(therm);
 274                 return 0;
 275         case NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST:
 276                 therm->bios_sensor.thrs_down_clock.hysteresis = value;
 277                 therm->func->program_alarms(therm);
 278                 return 0;
 279         case NVKM_THERM_ATTR_THRS_CRITICAL:
 280                 therm->bios_sensor.thrs_critical.temp = value;
 281                 therm->func->program_alarms(therm);
 282                 return 0;
 283         case NVKM_THERM_ATTR_THRS_CRITICAL_HYST:
 284                 therm->bios_sensor.thrs_critical.hysteresis = value;
 285                 therm->func->program_alarms(therm);
 286                 return 0;
 287         case NVKM_THERM_ATTR_THRS_SHUTDOWN:
 288                 therm->bios_sensor.thrs_shutdown.temp = value;
 289                 therm->func->program_alarms(therm);
 290                 return 0;
 291         case NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST:
 292                 therm->bios_sensor.thrs_shutdown.hysteresis = value;
 293                 therm->func->program_alarms(therm);
 294                 return 0;
 295         }
 296
 297         return -EINVAL;
 298 }
 299
 300 static void
 301 nvkm_therm_intr(struct nvkm_subdev *subdev)
 302 {
 303         struct nvkm_therm *therm = nvkm_therm(subdev);
 304         if (therm->func->intr)
 305                 therm->func->intr(therm);
 306 }
 307
 308 static int
 309 nvkm_therm_fini(struct nvkm_subdev *subdev, bool suspend)
 310 {
 311         struct nvkm_therm *therm = nvkm_therm(subdev);
 312
 313         if (therm->func->fini)
 314                 therm->func->fini(therm);
 315
 316         nvkm_therm_fan_fini(therm, suspend);
 317         nvkm_therm_sensor_fini(therm, suspend);
 318
 319         if (suspend) {
 320                 therm->suspend = therm->mode;
 321                 therm->mode = NVKM_THERM_CTRL_NONE;
 322         }
 323
 324         return 0;
 325 }
 326
 327 static int
 328 nvkm_therm_oneinit(struct nvkm_subdev *subdev)
 329 {
 330         struct nvkm_therm *therm = nvkm_therm(subdev);
 331         nvkm_therm_sensor_ctor(therm);
 332         nvkm_therm_ic_ctor(therm);
 333         nvkm_therm_fan_ctor(therm);
 334         nvkm_therm_fan_mode(therm, NVKM_THERM_CTRL_AUTO);
 335         nvkm_therm_sensor_preinit(therm);
 336         return 0;
 337 }
 338
 339 static int
 340 nvkm_therm_init(struct nvkm_subdev *subdev)
 341 {
 342         struct nvkm_therm *therm = nvkm_therm(subdev);
 343
 344         therm->func->init(therm);
 345
 346         if (therm->suspend >= 0) {
 347                 /* restore the pwm value only when on manual or auto mode */
 348                 if (therm->suspend > 0)
 349                         nvkm_therm_fan_set(therm, true, therm->fan->percent);
 350
 351                 nvkm_therm_fan_mode(therm, therm->suspend);
 352         }
 353
 354         nvkm_therm_sensor_init(therm);
 355         nvkm_therm_fan_init(therm);
 356         return 0;
 357 }
 358
 359 static void *
 360 nvkm_therm_dtor(struct nvkm_subdev *subdev)
 361 {
 362         struct nvkm_therm *therm = nvkm_therm(subdev);
 363         kfree(therm->fan);
 364         return therm;
 365 }
 366
 367 static const struct nvkm_subdev_func
 368 nvkm_therm = {
 369         .dtor = nvkm_therm_dtor,
 370         .oneinit = nvkm_therm_oneinit,
 371         .init = nvkm_therm_init,
 372         .fini = nvkm_therm_fini,
 373         .intr = nvkm_therm_intr,
 374 };
 375
 376 int
 377 nvkm_therm_new_(const struct nvkm_therm_func *func, struct nvkm_device *device,
 378                 int index, struct nvkm_therm **ptherm)
 379 {
 380         struct nvkm_therm *therm;
 381
 382         if (!(therm = *ptherm = kzalloc(sizeof(*therm), GFP_KERNEL)))
 383                 return -ENOMEM;
 384
 385         nvkm_subdev_ctor(&nvkm_therm, device, index, &therm->subdev);
 386         therm->func = func;
 387
 388         nvkm_alarm_init(&therm->alarm, nvkm_therm_alarm);
 389         spin_lock_init(&therm->lock);
 390         spin_lock_init(&therm->sensor.alarm_program_lock);
 391
 392         therm->fan_get = nvkm_therm_fan_user_get;
 393         therm->fan_set = nvkm_therm_fan_user_set;
 394         therm->attr_get = nvkm_therm_attr_get;
 395         therm->attr_set = nvkm_therm_attr_set;
 396         therm->mode = therm->suspend = -1; /* undefined */
 397         return 0;
 398 }