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 #include <core/option.h>
  27 #include <subdev/pmu.h>
  28
  29 int
  30 nvkm_therm_temp_get(struct nvkm_therm *therm)
  31 {
  32         if (therm->func->temp_get)
  33                 return therm->func->temp_get(therm);
  34         return -ENODEV;
  35 }
  36
  37 static int
  38 nvkm_therm_update_trip(struct nvkm_therm *therm)
  39 {
  40         struct nvbios_therm_trip_point *trip = therm->fan->bios.trip,
  41                                        *cur_trip = NULL,
  42                                        *last_trip = therm->last_trip;
  43         u8  temp = therm->func->temp_get(therm);
  44         u16 duty, i;
  45
  46         /* look for the trip point corresponding to the current temperature */
  47         cur_trip = NULL;
  48         for (i = 0; i < therm->fan->bios.nr_fan_trip; i++) {
  49                 if (temp >= trip[i].temp)
  50                         cur_trip = &trip[i];
  51         }
  52
  53         /* account for the hysteresis cycle */
  54         if (last_trip && temp <= (last_trip->temp) &&
  55             temp > (last_trip->temp - last_trip->hysteresis))
  56                 cur_trip = last_trip;
  57
  58         if (cur_trip) {
  59                 duty = cur_trip->fan_duty;
  60                 therm->last_trip = cur_trip;
  61         } else {
  62                 duty = 0;
  63                 therm->last_trip = NULL;
  64         }
  65
  66         return duty;
  67 }
  68
  69 static int
  70 nvkm_therm_compute_linear_duty(struct nvkm_therm *therm, u8 linear_min_temp,
  71                                u8 linear_max_temp)
  72 {
  73         u8  temp = therm->func->temp_get(therm);
  74         u16 duty;
  75
  76         /* handle the non-linear part first */
  77         if (temp < linear_min_temp)
  78                 return therm->fan->bios.min_duty;
  79         else if (temp > linear_max_temp)
  80                 return therm->fan->bios.max_duty;
  81
  82         /* we are in the linear zone */
  83         duty  = (temp - linear_min_temp);
  84         duty *= (therm->fan->bios.max_duty - therm->fan->bios.min_duty);
  85         duty /= (linear_max_temp - linear_min_temp);
  86         duty += therm->fan->bios.min_duty;
  87         return duty;
  88 }
  89
  90 static int
  91 nvkm_therm_update_linear(struct nvkm_therm *therm)
  92 {
  93         u8  min = therm->fan->bios.linear_min_temp;
  94         u8  max = therm->fan->bios.linear_max_temp;
  95         return nvkm_therm_compute_linear_duty(therm, min, max);
  96 }
  97
  98 static int
  99 nvkm_therm_update_linear_fallback(struct nvkm_therm *therm)
 100 {
 101         u8 max = therm->bios_sensor.thrs_fan_boost.temp;
 102         return nvkm_therm_compute_linear_duty(therm, 30, max);
 103 }
 104
 105 static void
 106 nvkm_therm_update(struct nvkm_therm *therm, int mode)
 107 {
 108         struct nvkm_subdev *subdev = &therm->subdev;
 109         struct nvkm_timer *tmr = subdev->device->timer;
 110         unsigned long flags;
 111         bool immd = true;
 112         bool poll = true;
 113         int duty = -1;
 114
 115         spin_lock_irqsave(&therm->lock, flags);
 116         if (mode < 0)
 117                 mode = therm->mode;
 118         therm->mode = mode;
 119
 120         switch (mode) {
 121         case NVKM_THERM_CTRL_MANUAL:
 122                 nvkm_timer_alarm(tmr, 0, &therm->alarm);
 123                 duty = nvkm_therm_fan_get(therm);
 124                 if (duty < 0)
 125                         duty = 100;
 126                 poll = false;
 127                 break;
 128         case NVKM_THERM_CTRL_AUTO:
 129                 switch(therm->fan->bios.fan_mode) {
 130                 case NVBIOS_THERM_FAN_TRIP:
 131                         duty = nvkm_therm_update_trip(therm);
 132                         break;
 133                 case NVBIOS_THERM_FAN_LINEAR:
 134                         duty = nvkm_therm_update_linear(therm);
 135                         break;
 136                 case NVBIOS_THERM_FAN_OTHER:
 137                         if (therm->cstate) {
 138                                 duty = therm->cstate;
 139                                 poll = false;
 140                         } else {
 141                                 duty = nvkm_therm_update_linear_fallback(therm);
 142                         }
 143                         break;
 144                 }
 145                 immd = false;
 146                 break;
 147         case NVKM_THERM_CTRL_NONE:
 148         default:
 149                 nvkm_timer_alarm(tmr, 0, &therm->alarm);
 150                 poll = false;
 151         }
 152
 153         if (poll)
 154                 nvkm_timer_alarm(tmr, 1000000000ULL, &therm->alarm);
 155         spin_unlock_irqrestore(&therm->lock, flags);
 156
 157         if (duty >= 0) {
 158                 nvkm_debug(subdev, "FAN target request: %d%%\n", duty);
 159                 nvkm_therm_fan_set(therm, immd, duty);
 160         }
 161 }
 162
 163 int
 164 nvkm_therm_cstate(struct nvkm_therm *therm, int fan, int dir)
 165 {
 166         struct nvkm_subdev *subdev = &therm->subdev;
 167         if (!dir || (dir < 0 && fan < therm->cstate) ||
 168                     (dir > 0 && fan > therm->cstate)) {
 169                 nvkm_debug(subdev, "default fan speed -> %d%%\n", fan);
 170                 therm->cstate = fan;
 171                 nvkm_therm_update(therm, -1);
 172         }
 173         return 0;
 174 }
 175
 176 static void
 177 nvkm_therm_alarm(struct nvkm_alarm *alarm)
 178 {
 179         struct nvkm_therm *therm =
 180                container_of(alarm, struct nvkm_therm, alarm);
 181         nvkm_therm_update(therm, -1);
 182 }
 183
 184 int
 185 nvkm_therm_fan_mode(struct nvkm_therm *therm, int mode)
 186 {
 187         struct nvkm_subdev *subdev = &therm->subdev;
 188         struct nvkm_device *device = subdev->device;
 189         static const char *name[] = {
 190                 "disabled",
 191                 "manual",
 192                 "automatic"
 193         };
 194
 195         /* The default PPWR ucode on fermi interferes with fan management */
 196         if ((mode >= ARRAY_SIZE(name)) ||
 197             (mode != NVKM_THERM_CTRL_NONE && nvkm_pmu_fan_controlled(device)))
 198                 return -EINVAL;
 199
 200         /* do not allow automatic fan management if the thermal sensor is
 201          * not available */
 202         if (mode == NVKM_THERM_CTRL_AUTO &&
 203             therm->func->temp_get(therm) < 0)
 204                 return -EINVAL;
 205
 206         if (therm->mode == mode)
 207                 return 0;
 208
 209         nvkm_debug(subdev, "fan management: %s\n", name[mode]);
 210         nvkm_therm_update(therm, mode);
 211         return 0;
 212 }
 213
 214 int
 215 nvkm_therm_attr_get(struct nvkm_therm *therm, enum nvkm_therm_attr_type type)
 216 {
 217         switch (type) {
 218         case NVKM_THERM_ATTR_FAN_MIN_DUTY:
 219                 return therm->fan->bios.min_duty;
 220         case NVKM_THERM_ATTR_FAN_MAX_DUTY:
 221                 return therm->fan->bios.max_duty;
 222         case NVKM_THERM_ATTR_FAN_MODE:
 223                 return therm->mode;
 224         case NVKM_THERM_ATTR_THRS_FAN_BOOST:
 225                 return therm->bios_sensor.thrs_fan_boost.temp;
 226         case NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST:
 227                 return therm->bios_sensor.thrs_fan_boost.hysteresis;
 228         case NVKM_THERM_ATTR_THRS_DOWN_CLK:
 229                 return therm->bios_sensor.thrs_down_clock.temp;
 230         case NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST:
 231                 return therm->bios_sensor.thrs_down_clock.hysteresis;
 232         case NVKM_THERM_ATTR_THRS_CRITICAL:
 233                 return therm->bios_sensor.thrs_critical.temp;
 234         case NVKM_THERM_ATTR_THRS_CRITICAL_HYST:
 235                 return therm->bios_sensor.thrs_critical.hysteresis;
 236         case NVKM_THERM_ATTR_THRS_SHUTDOWN:
 237                 return therm->bios_sensor.thrs_shutdown.temp;
 238         case NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST:
 239                 return therm->bios_sensor.thrs_shutdown.hysteresis;
 240         }
 241
 242         return -EINVAL;
 243 }
 244
 245 int
 246 nvkm_therm_attr_set(struct nvkm_therm *therm,
 247                     enum nvkm_therm_attr_type type, int value)
 248 {
 249         switch (type) {
 250         case NVKM_THERM_ATTR_FAN_MIN_DUTY:
 251                 if (value < 0)
 252                         value = 0;
 253                 if (value > therm->fan->bios.max_duty)
 254                         value = therm->fan->bios.max_duty;
 255                 therm->fan->bios.min_duty = value;
 256                 return 0;
 257         case NVKM_THERM_ATTR_FAN_MAX_DUTY:
 258                 if (value < 0)
 259                         value = 0;
 260                 if (value < therm->fan->bios.min_duty)
 261                         value = therm->fan->bios.min_duty;
 262                 therm->fan->bios.max_duty = value;
 263                 return 0;
 264         case NVKM_THERM_ATTR_FAN_MODE:
 265                 return nvkm_therm_fan_mode(therm, value);
 266         case NVKM_THERM_ATTR_THRS_FAN_BOOST:
 267                 therm->bios_sensor.thrs_fan_boost.temp = value;
 268                 therm->func->program_alarms(therm);
 269                 return 0;
 270         case NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST:
 271                 therm->bios_sensor.thrs_fan_boost.hysteresis = value;
 272                 therm->func->program_alarms(therm);
 273                 return 0;
 274         case NVKM_THERM_ATTR_THRS_DOWN_CLK:
 275                 therm->bios_sensor.thrs_down_clock.temp = value;
 276                 therm->func->program_alarms(therm);
 277                 return 0;
 278         case NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST:
 279                 therm->bios_sensor.thrs_down_clock.hysteresis = value;
 280                 therm->func->program_alarms(therm);
 281                 return 0;
 282         case NVKM_THERM_ATTR_THRS_CRITICAL:
 283                 therm->bios_sensor.thrs_critical.temp = value;
 284                 therm->func->program_alarms(therm);
 285                 return 0;
 286         case NVKM_THERM_ATTR_THRS_CRITICAL_HYST:
 287                 therm->bios_sensor.thrs_critical.hysteresis = value;
 288                 therm->func->program_alarms(therm);
 289                 return 0;
 290         case NVKM_THERM_ATTR_THRS_SHUTDOWN:
 291                 therm->bios_sensor.thrs_shutdown.temp = value;
 292                 therm->func->program_alarms(therm);
 293                 return 0;
 294         case NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST:
 295                 therm->bios_sensor.thrs_shutdown.hysteresis = value;
 296                 therm->func->program_alarms(therm);
 297                 return 0;
 298         }
 299
 300         return -EINVAL;
 301 }
 302
 303 void
 304 nvkm_therm_clkgate_enable(struct nvkm_therm *therm)
 305 {
 306         if (!therm || !therm->func->clkgate_enable || !therm->clkgating_enabled)
 307                 return;
 308
 309         nvkm_debug(&therm->subdev,
 310                    "Enabling clockgating\n");
 311         therm->func->clkgate_enable(therm);
 312 }
 313
 314 void
 315 nvkm_therm_clkgate_fini(struct nvkm_therm *therm, bool suspend)
 316 {
 317         if (!therm || !therm->func->clkgate_fini || !therm->clkgating_enabled)
 318                 return;
 319
 320         nvkm_debug(&therm->subdev,
 321                    "Preparing clockgating for %s\n",
 322                    suspend ? "suspend" : "fini");
 323         therm->func->clkgate_fini(therm, suspend);
 324 }
 325
 326 static void
 327 nvkm_therm_clkgate_oneinit(struct nvkm_therm *therm)
 328 {
 329         if (!therm->func->clkgate_enable || !therm->clkgating_enabled)
 330                 return;
 331
 332         nvkm_info(&therm->subdev, "Clockgating enabled\n");
 333 }
 334
 335 static void
 336 nvkm_therm_intr(struct nvkm_subdev *subdev)
 337 {
 338         struct nvkm_therm *therm = nvkm_therm(subdev);
 339         if (therm->func->intr)
 340                 therm->func->intr(therm);
 341 }
 342
 343 static int
 344 nvkm_therm_fini(struct nvkm_subdev *subdev, bool suspend)
 345 {
 346         struct nvkm_therm *therm = nvkm_therm(subdev);
 347
 348         if (therm->func->fini)
 349                 therm->func->fini(therm);
 350
 351         nvkm_therm_fan_fini(therm, suspend);
 352         nvkm_therm_sensor_fini(therm, suspend);
 353
 354         if (suspend) {
 355                 therm->suspend = therm->mode;
 356                 therm->mode = NVKM_THERM_CTRL_NONE;
 357         }
 358
 359         return 0;
 360 }
 361
 362 static int
 363 nvkm_therm_oneinit(struct nvkm_subdev *subdev)
 364 {
 365         struct nvkm_therm *therm = nvkm_therm(subdev);
 366         nvkm_therm_sensor_ctor(therm);
 367         nvkm_therm_ic_ctor(therm);
 368         nvkm_therm_fan_ctor(therm);
 369         nvkm_therm_fan_mode(therm, NVKM_THERM_CTRL_AUTO);
 370         nvkm_therm_sensor_preinit(therm);
 371         nvkm_therm_clkgate_oneinit(therm);
 372         return 0;
 373 }
 374
 375 static int
 376 nvkm_therm_init(struct nvkm_subdev *subdev)
 377 {
 378         struct nvkm_therm *therm = nvkm_therm(subdev);
 379
 380         if (therm->func->init)
 381                 therm->func->init(therm);
 382
 383         if (therm->suspend >= 0) {
 384                 /* restore the pwm value only when on manual or auto mode */
 385                 if (therm->suspend > 0)
 386                         nvkm_therm_fan_set(therm, true, therm->fan->percent);
 387
 388                 nvkm_therm_fan_mode(therm, therm->suspend);
 389         }
 390
 391         nvkm_therm_sensor_init(therm);
 392         nvkm_therm_fan_init(therm);
 393         return 0;
 394 }
 395
 396 void
 397 nvkm_therm_clkgate_init(struct nvkm_therm *therm,
 398                         const struct nvkm_therm_clkgate_pack *p)
 399 {
 400         if (!therm || !therm->func->clkgate_init || !therm->clkgating_enabled)
 401                 return;
 402
 403         therm->func->clkgate_init(therm, p);
 404 }
 405
 406 static void *
 407 nvkm_therm_dtor(struct nvkm_subdev *subdev)
 408 {
 409         struct nvkm_therm *therm = nvkm_therm(subdev);
 410         kfree(therm->fan);
 411         return therm;
 412 }
 413
 414 static const struct nvkm_subdev_func
 415 nvkm_therm = {
 416         .dtor = nvkm_therm_dtor,
 417         .oneinit = nvkm_therm_oneinit,
 418         .init = nvkm_therm_init,
 419         .fini = nvkm_therm_fini,
 420         .intr = nvkm_therm_intr,
 421 };
 422
 423 void
 424 nvkm_therm_ctor(struct nvkm_therm *therm, struct nvkm_device *device,
 425                 int index, const struct nvkm_therm_func *func)
 426 {
 427         nvkm_subdev_ctor(&nvkm_therm, device, index, &therm->subdev);
 428         therm->func = func;
 429
 430         nvkm_alarm_init(&therm->alarm, nvkm_therm_alarm);
 431         spin_lock_init(&therm->lock);
 432         spin_lock_init(&therm->sensor.alarm_program_lock);
 433
 434         therm->fan_get = nvkm_therm_fan_user_get;
 435         therm->fan_set = nvkm_therm_fan_user_set;
 436         therm->attr_get = nvkm_therm_attr_get;
 437         therm->attr_set = nvkm_therm_attr_set;
 438         therm->mode = therm->suspend = -1; /* undefined */
 439
 440         therm->clkgating_enabled = nvkm_boolopt(device->cfgopt,
 441                                                 "NvPmEnableGating", false);
 442 }
 443
 444 int
 445 nvkm_therm_new_(const struct nvkm_therm_func *func, struct nvkm_device *device,
 446                 int index, struct nvkm_therm **ptherm)
 447 {
 448         struct nvkm_therm *therm;
 449
 450         if (!(therm = *ptherm = kzalloc(sizeof(*therm), GFP_KERNEL)))
 451                 return -ENOMEM;
 452
 453         nvkm_therm_ctor(therm, device, index, func);
 454         return 0;
 455 }