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 <nvkm/core/option.h>
  25 #include "priv.h"
  26
  27 int
  28 nvkm_therm_temp_get(struct nvkm_therm *therm)
  29 {
  30         if (therm->func->temp_get)
  31                 return therm->func->temp_get(therm);
  32         return -ENODEV;
  33 }
  34
  35 static int
  36 nvkm_therm_update_trip(struct nvkm_therm *therm)
  37 {
  38         struct nvbios_therm_trip_point *trip = therm->fan->bios.trip,
  39                                        *cur_trip = NULL,
  40                                        *last_trip = therm->last_trip;
  41         u8  temp = therm->func->temp_get(therm);
  42         u16 duty, i;
  43
  44         /* look for the trip point corresponding to the current temperature */
  45         cur_trip = NULL;
  46         for (i = 0; i < therm->fan->bios.nr_fan_trip; i++) {
  47                 if (temp >= trip[i].temp)
  48                         cur_trip = &trip[i];
  49         }
  50
  51         /* account for the hysteresis cycle */
  52         if (last_trip && temp <= (last_trip->temp) &&
  53             temp > (last_trip->temp - last_trip->hysteresis))
  54                 cur_trip = last_trip;
  55
  56         if (cur_trip) {
  57                 duty = cur_trip->fan_duty;
  58                 therm->last_trip = cur_trip;
  59         } else {
  60                 duty = 0;
  61                 therm->last_trip = NULL;
  62         }
  63
  64         return duty;
  65 }
  66
  67 static int
  68 nvkm_therm_compute_linear_duty(struct nvkm_therm *therm, u8 linear_min_temp,
  69                                u8 linear_max_temp)
  70 {
  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 int
  89 nvkm_therm_update_linear(struct nvkm_therm *therm)
  90 {
  91         u8  min = therm->fan->bios.linear_min_temp;
  92         u8  max = therm->fan->bios.linear_max_temp;
  93         return nvkm_therm_compute_linear_duty(therm, min, max);
  94 }
  95
  96 static int
  97 nvkm_therm_update_linear_fallback(struct nvkm_therm *therm)
  98 {
  99         u8 max = therm->bios_sensor.thrs_fan_boost.temp;
 100         return nvkm_therm_compute_linear_duty(therm, 30, max);
 101 }
 102
 103 static void
 104 nvkm_therm_update(struct nvkm_therm *therm, int mode)
 105 {
 106         struct nvkm_subdev *subdev = &therm->subdev;
 107         struct nvkm_timer *tmr = subdev->device->timer;
 108         unsigned long flags;
 109         bool immd = true;
 110         bool poll = true;
 111         int duty = -1;
 112
 113         spin_lock_irqsave(&therm->lock, flags);
 114         if (mode < 0)
 115                 mode = therm->mode;
 116         therm->mode = mode;
 117
 118         switch (mode) {
 119         case NVKM_THERM_CTRL_MANUAL:
 120                 nvkm_timer_alarm(tmr, 0, &therm->alarm);
 121                 duty = nvkm_therm_fan_get(therm);
 122                 if (duty < 0)
 123                         duty = 100;
 124                 poll = false;
 125                 break;
 126         case NVKM_THERM_CTRL_AUTO:
 127                 switch(therm->fan->bios.fan_mode) {
 128                 case NVBIOS_THERM_FAN_TRIP:
 129                         duty = nvkm_therm_update_trip(therm);
 130                         break;
 131                 case NVBIOS_THERM_FAN_LINEAR:
 132                         duty = nvkm_therm_update_linear(therm);
 133                         break;
 134                 case NVBIOS_THERM_FAN_OTHER:
 135                         if (therm->cstate) {
 136                                 duty = therm->cstate;
 137                                 poll = false;
 138                         } else {
 139                                 duty = nvkm_therm_update_linear_fallback(therm);
 140                         }
 141                         break;
 142                 }
 143                 immd = false;
 144                 break;
 145         case NVKM_THERM_CTRL_NONE:
 146         default:
 147                 nvkm_timer_alarm(tmr, 0, &therm->alarm);
 148                 poll = false;
 149         }
 150
 151         if (poll)
 152                 nvkm_timer_alarm(tmr, 1000000000ULL, &therm->alarm);
 153         spin_unlock_irqrestore(&therm->lock, flags);
 154
 155         if (duty >= 0) {
 156                 nvkm_debug(subdev, "FAN target request: %d%%\n", duty);
 157                 nvkm_therm_fan_set(therm, immd, duty);
 158         }
 159 }
 160
 161 int
 162 nvkm_therm_cstate(struct nvkm_therm *therm, int fan, int dir)
 163 {
 164         struct nvkm_subdev *subdev = &therm->subdev;
 165         if (!dir || (dir < 0 && fan < therm->cstate) ||
 166                     (dir > 0 && fan > therm->cstate)) {
 167                 nvkm_debug(subdev, "default fan speed -> %d%%\n", fan);
 168                 therm->cstate = fan;
 169                 nvkm_therm_update(therm, -1);
 170         }
 171         return 0;
 172 }
 173
 174 static void
 175 nvkm_therm_alarm(struct nvkm_alarm *alarm)
 176 {
 177         struct nvkm_therm *therm =
 178                container_of(alarm, struct nvkm_therm, alarm);
 179         nvkm_therm_update(therm, -1);
 180 }
 181
 182 int
 183 nvkm_therm_fan_mode(struct nvkm_therm *therm, int mode)
 184 {
 185         struct nvkm_subdev *subdev = &therm->subdev;
 186         struct nvkm_device *device = subdev->device;
 187         static const char *name[] = {
 188                 "disabled",
 189                 "manual",
 190                 "automatic"
 191         };
 192
 193         /* The default PPWR ucode on fermi interferes with fan management */
 194         if ((mode >= ARRAY_SIZE(name)) ||
 195             (mode != NVKM_THERM_CTRL_NONE && device->card_type >= NV_C0 &&
 196              !device->pmu))
 197                 return -EINVAL;
 198
 199         /* do not allow automatic fan management if the thermal sensor is
 200          * not available */
 201         if (mode == NVKM_THERM_CTRL_AUTO &&
 202             therm->func->temp_get(therm) < 0)
 203                 return -EINVAL;
 204
 205         if (therm->mode == mode)
 206                 return 0;
 207
 208         nvkm_debug(subdev, "fan management: %s\n", name[mode]);
 209         nvkm_therm_update(therm, mode);
 210         return 0;
 211 }
 212
 213 int
 214 nvkm_therm_attr_get(struct nvkm_therm *therm, enum nvkm_therm_attr_type type)
 215 {
 216         switch (type) {
 217         case NVKM_THERM_ATTR_FAN_MIN_DUTY:
 218                 return therm->fan->bios.min_duty;
 219         case NVKM_THERM_ATTR_FAN_MAX_DUTY:
 220                 return therm->fan->bios.max_duty;
 221         case NVKM_THERM_ATTR_FAN_MODE:
 222                 return therm->mode;
 223         case NVKM_THERM_ATTR_THRS_FAN_BOOST:
 224                 return therm->bios_sensor.thrs_fan_boost.temp;
 225         case NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST:
 226                 return therm->bios_sensor.thrs_fan_boost.hysteresis;
 227         case NVKM_THERM_ATTR_THRS_DOWN_CLK:
 228                 return therm->bios_sensor.thrs_down_clock.temp;
 229         case NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST:
 230                 return therm->bios_sensor.thrs_down_clock.hysteresis;
 231         case NVKM_THERM_ATTR_THRS_CRITICAL:
 232                 return therm->bios_sensor.thrs_critical.temp;
 233         case NVKM_THERM_ATTR_THRS_CRITICAL_HYST:
 234                 return therm->bios_sensor.thrs_critical.hysteresis;
 235         case NVKM_THERM_ATTR_THRS_SHUTDOWN:
 236                 return therm->bios_sensor.thrs_shutdown.temp;
 237         case NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST:
 238                 return therm->bios_sensor.thrs_shutdown.hysteresis;
 239         }
 240
 241         return -EINVAL;
 242 }
 243
 244 int
 245 nvkm_therm_attr_set(struct nvkm_therm *therm,
 246                     enum nvkm_therm_attr_type type, int value)
 247 {
 248         switch (type) {
 249         case NVKM_THERM_ATTR_FAN_MIN_DUTY:
 250                 if (value < 0)
 251                         value = 0;
 252                 if (value > therm->fan->bios.max_duty)
 253                         value = therm->fan->bios.max_duty;
 254                 therm->fan->bios.min_duty = value;
 255                 return 0;
 256         case NVKM_THERM_ATTR_FAN_MAX_DUTY:
 257                 if (value < 0)
 258                         value = 0;
 259                 if (value < therm->fan->bios.min_duty)
 260                         value = therm->fan->bios.min_duty;
 261                 therm->fan->bios.max_duty = value;
 262                 return 0;
 263         case NVKM_THERM_ATTR_FAN_MODE:
 264                 return nvkm_therm_fan_mode(therm, value);
 265         case NVKM_THERM_ATTR_THRS_FAN_BOOST:
 266                 therm->bios_sensor.thrs_fan_boost.temp = value;
 267                 therm->func->program_alarms(therm);
 268                 return 0;
 269         case NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST:
 270                 therm->bios_sensor.thrs_fan_boost.hysteresis = value;
 271                 therm->func->program_alarms(therm);
 272                 return 0;
 273         case NVKM_THERM_ATTR_THRS_DOWN_CLK:
 274                 therm->bios_sensor.thrs_down_clock.temp = value;
 275                 therm->func->program_alarms(therm);
 276                 return 0;
 277         case NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST:
 278                 therm->bios_sensor.thrs_down_clock.hysteresis = value;
 279                 therm->func->program_alarms(therm);
 280                 return 0;
 281         case NVKM_THERM_ATTR_THRS_CRITICAL:
 282                 therm->bios_sensor.thrs_critical.temp = value;
 283                 therm->func->program_alarms(therm);
 284                 return 0;
 285         case NVKM_THERM_ATTR_THRS_CRITICAL_HYST:
 286                 therm->bios_sensor.thrs_critical.hysteresis = value;
 287                 therm->func->program_alarms(therm);
 288                 return 0;
 289         case NVKM_THERM_ATTR_THRS_SHUTDOWN:
 290                 therm->bios_sensor.thrs_shutdown.temp = value;
 291                 therm->func->program_alarms(therm);
 292                 return 0;
 293         case NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST:
 294                 therm->bios_sensor.thrs_shutdown.hysteresis = value;
 295                 therm->func->program_alarms(therm);
 296                 return 0;
 297         }
 298
 299         return -EINVAL;
 300 }
 301
 302 void
 303 nvkm_therm_clkgate_enable(struct nvkm_therm *therm)
 304 {
 305         if (!therm || !therm->func->clkgate_enable || !therm->clkgating_enabled)
 306                 return;
 307
 308         nvkm_debug(&therm->subdev,
 309                    "Enabling clockgating\n");
 310         therm->func->clkgate_enable(therm);
 311 }
 312
 313 void
 314 nvkm_therm_clkgate_fini(struct nvkm_therm *therm, bool suspend)
 315 {
 316         if (!therm || !therm->func->clkgate_fini || !therm->clkgating_enabled)
 317                 return;
 318
 319         nvkm_debug(&therm->subdev,
 320                    "Preparing clockgating for %s\n",
 321                    suspend ? "suspend" : "fini");
 322         therm->func->clkgate_fini(therm, suspend);
 323 }
 324
 325 static void
 326 nvkm_therm_clkgate_oneinit(struct nvkm_therm *therm)
 327 {
 328         if (!therm->func->clkgate_enable || !therm->clkgating_enabled)
 329                 return;
 330
 331         nvkm_info(&therm->subdev, "Clockgating enabled\n");
 332 }
 333
 334 static void
 335 nvkm_therm_intr(struct nvkm_subdev *subdev)
 336 {
 337         struct nvkm_therm *therm = nvkm_therm(subdev);
 338         if (therm->func->intr)
 339                 therm->func->intr(therm);
 340 }
 341
 342 static int
 343 nvkm_therm_fini(struct nvkm_subdev *subdev, bool suspend)
 344 {
 345         struct nvkm_therm *therm = nvkm_therm(subdev);
 346
 347         if (therm->func->fini)
 348                 therm->func->fini(therm);
 349
 350         nvkm_therm_fan_fini(therm, suspend);
 351         nvkm_therm_sensor_fini(therm, suspend);
 352
 353         if (suspend) {
 354                 therm->suspend = therm->mode;
 355                 therm->mode = NVKM_THERM_CTRL_NONE;
 356         }
 357
 358         return 0;
 359 }
 360
 361 static int
 362 nvkm_therm_oneinit(struct nvkm_subdev *subdev)
 363 {
 364         struct nvkm_therm *therm = nvkm_therm(subdev);
 365         nvkm_therm_sensor_ctor(therm);
 366         nvkm_therm_ic_ctor(therm);
 367         nvkm_therm_fan_ctor(therm);
 368         nvkm_therm_fan_mode(therm, NVKM_THERM_CTRL_AUTO);
 369         nvkm_therm_sensor_preinit(therm);
 370         nvkm_therm_clkgate_oneinit(therm);
 371         return 0;
 372 }
 373
 374 static int
 375 nvkm_therm_init(struct nvkm_subdev *subdev)
 376 {
 377         struct nvkm_therm *therm = nvkm_therm(subdev);
 378
 379         if (therm->func->init)
 380                 therm->func->init(therm);
 381
 382         if (therm->suspend >= 0) {
 383                 /* restore the pwm value only when on manual or auto mode */
 384                 if (therm->suspend > 0)
 385                         nvkm_therm_fan_set(therm, true, therm->fan->percent);
 386
 387                 nvkm_therm_fan_mode(therm, therm->suspend);
 388         }
 389
 390         nvkm_therm_sensor_init(therm);
 391         nvkm_therm_fan_init(therm);
 392         return 0;
 393 }
 394
 395 void
 396 nvkm_therm_clkgate_init(struct nvkm_therm *therm,
 397                         const struct nvkm_therm_clkgate_pack *p)
 398 {
 399         if (!therm || !therm->func->clkgate_init || !therm->clkgating_enabled)
 400                 return;
 401
 402         therm->func->clkgate_init(therm, p);
 403 }
 404
 405 static void *
 406 nvkm_therm_dtor(struct nvkm_subdev *subdev)
 407 {
 408         struct nvkm_therm *therm = nvkm_therm(subdev);
 409         kfree(therm->fan);
 410         return therm;
 411 }
 412
 413 static const struct nvkm_subdev_func
 414 nvkm_therm = {
 415         .dtor = nvkm_therm_dtor,
 416         .oneinit = nvkm_therm_oneinit,
 417         .init = nvkm_therm_init,
 418         .fini = nvkm_therm_fini,
 419         .intr = nvkm_therm_intr,
 420 };
 421
 422 void
 423 nvkm_therm_ctor(struct nvkm_therm *therm, struct nvkm_device *device,
 424                 int index, const struct nvkm_therm_func *func)
 425 {
 426         nvkm_subdev_ctor(&nvkm_therm, device, index, &therm->subdev);
 427         therm->func = func;
 428
 429         nvkm_alarm_init(&therm->alarm, nvkm_therm_alarm);
 430         spin_lock_init(&therm->lock);
 431         spin_lock_init(&therm->sensor.alarm_program_lock);
 432
 433         therm->fan_get = nvkm_therm_fan_user_get;
 434         therm->fan_set = nvkm_therm_fan_user_set;
 435         therm->attr_get = nvkm_therm_attr_get;
 436         therm->attr_set = nvkm_therm_attr_set;
 437         therm->mode = therm->suspend = -1; /* undefined */
 438
 439         therm->clkgating_enabled = nvkm_boolopt(device->cfgopt,
 440                                                 "NvPmEnableGating", false);
 441 }
 442
 443 int
 444 nvkm_therm_new_(const struct nvkm_therm_func *func, struct nvkm_device *device,
 445                 int index, struct nvkm_therm **ptherm)
 446 {
 447         struct nvkm_therm *therm;
 448
 449         if (!(therm = *ptherm = kzalloc(sizeof(*therm), GFP_KERNEL)))
 450                 return -ENOMEM;
 451
 452         nvkm_therm_ctor(therm, device, index, func);
 453         return 0;
 454 }