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                         else
 138                                 duty = nvkm_therm_update_linear_fallback(therm);
 139                         poll = false;
 140                         break;
 141                 }
 142                 immd = false;
 143                 break;
 144         case NVKM_THERM_CTRL_NONE:
 145         default:
 146                 nvkm_timer_alarm(tmr, 0, &therm->alarm);
 147                 poll = false;
 148         }
 149
 150         if (poll)
 151                 nvkm_timer_alarm(tmr, 1000000000ULL, &therm->alarm);
 152         spin_unlock_irqrestore(&therm->lock, flags);
 153
 154         if (duty >= 0) {
 155                 nvkm_debug(subdev, "FAN target request: %d%%\n", duty);
 156                 nvkm_therm_fan_set(therm, immd, duty);
 157         }
 158 }
 159
 160 int
 161 nvkm_therm_cstate(struct nvkm_therm *therm, int fan, int dir)
 162 {
 163         struct nvkm_subdev *subdev = &therm->subdev;
 164         if (!dir || (dir < 0 && fan < therm->cstate) ||
 165                     (dir > 0 && fan > therm->cstate)) {
 166                 nvkm_debug(subdev, "default fan speed -> %d%%\n", fan);
 167                 therm->cstate = fan;
 168                 nvkm_therm_update(therm, -1);
 169         }
 170         return 0;
 171 }
 172
 173 static void
 174 nvkm_therm_alarm(struct nvkm_alarm *alarm)
 175 {
 176         struct nvkm_therm *therm =
 177                container_of(alarm, struct nvkm_therm, alarm);
 178         nvkm_therm_update(therm, -1);
 179 }
 180
 181 int
 182 nvkm_therm_fan_mode(struct nvkm_therm *therm, int mode)
 183 {
 184         struct nvkm_subdev *subdev = &therm->subdev;
 185         struct nvkm_device *device = subdev->device;
 186         static const char *name[] = {
 187                 "disabled",
 188                 "manual",
 189                 "automatic"
 190         };
 191
 192         /* The default PPWR ucode on fermi interferes with fan management */
 193         if ((mode >= ARRAY_SIZE(name)) ||
 194             (mode != NVKM_THERM_CTRL_NONE && device->card_type >= NV_C0 &&
 195              !device->pmu))
 196                 return -EINVAL;
 197
 198         /* do not allow automatic fan management if the thermal sensor is
 199          * not available */
 200         if (mode == NVKM_THERM_CTRL_AUTO &&
 201             therm->func->temp_get(therm) < 0)
 202                 return -EINVAL;
 203
 204         if (therm->mode == mode)
 205                 return 0;
 206
 207         nvkm_debug(subdev, "fan management: %s\n", name[mode]);
 208         nvkm_therm_update(therm, mode);
 209         return 0;
 210 }
 211
 212 int
 213 nvkm_therm_attr_get(struct nvkm_therm *therm, enum nvkm_therm_attr_type type)
 214 {
 215         switch (type) {
 216         case NVKM_THERM_ATTR_FAN_MIN_DUTY:
 217                 return therm->fan->bios.min_duty;
 218         case NVKM_THERM_ATTR_FAN_MAX_DUTY:
 219                 return therm->fan->bios.max_duty;
 220         case NVKM_THERM_ATTR_FAN_MODE:
 221                 return therm->mode;
 222         case NVKM_THERM_ATTR_THRS_FAN_BOOST:
 223                 return therm->bios_sensor.thrs_fan_boost.temp;
 224         case NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST:
 225                 return therm->bios_sensor.thrs_fan_boost.hysteresis;
 226         case NVKM_THERM_ATTR_THRS_DOWN_CLK:
 227                 return therm->bios_sensor.thrs_down_clock.temp;
 228         case NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST:
 229                 return therm->bios_sensor.thrs_down_clock.hysteresis;
 230         case NVKM_THERM_ATTR_THRS_CRITICAL:
 231                 return therm->bios_sensor.thrs_critical.temp;
 232         case NVKM_THERM_ATTR_THRS_CRITICAL_HYST:
 233                 return therm->bios_sensor.thrs_critical.hysteresis;
 234         case NVKM_THERM_ATTR_THRS_SHUTDOWN:
 235                 return therm->bios_sensor.thrs_shutdown.temp;
 236         case NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST:
 237                 return therm->bios_sensor.thrs_shutdown.hysteresis;
 238         }
 239
 240         return -EINVAL;
 241 }
 242
 243 int
 244 nvkm_therm_attr_set(struct nvkm_therm *therm,
 245                     enum nvkm_therm_attr_type type, int value)
 246 {
 247         switch (type) {
 248         case NVKM_THERM_ATTR_FAN_MIN_DUTY:
 249                 if (value < 0)
 250                         value = 0;
 251                 if (value > therm->fan->bios.max_duty)
 252                         value = therm->fan->bios.max_duty;
 253                 therm->fan->bios.min_duty = value;
 254                 return 0;
 255         case NVKM_THERM_ATTR_FAN_MAX_DUTY:
 256                 if (value < 0)
 257                         value = 0;
 258                 if (value < therm->fan->bios.min_duty)
 259                         value = therm->fan->bios.min_duty;
 260                 therm->fan->bios.max_duty = value;
 261                 return 0;
 262         case NVKM_THERM_ATTR_FAN_MODE:
 263                 return nvkm_therm_fan_mode(therm, value);
 264         case NVKM_THERM_ATTR_THRS_FAN_BOOST:
 265                 therm->bios_sensor.thrs_fan_boost.temp = value;
 266                 therm->func->program_alarms(therm);
 267                 return 0;
 268         case NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST:
 269                 therm->bios_sensor.thrs_fan_boost.hysteresis = value;
 270                 therm->func->program_alarms(therm);
 271                 return 0;
 272         case NVKM_THERM_ATTR_THRS_DOWN_CLK:
 273                 therm->bios_sensor.thrs_down_clock.temp = value;
 274                 therm->func->program_alarms(therm);
 275                 return 0;
 276         case NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST:
 277                 therm->bios_sensor.thrs_down_clock.hysteresis = value;
 278                 therm->func->program_alarms(therm);
 279                 return 0;
 280         case NVKM_THERM_ATTR_THRS_CRITICAL:
 281                 therm->bios_sensor.thrs_critical.temp = value;
 282                 therm->func->program_alarms(therm);
 283                 return 0;
 284         case NVKM_THERM_ATTR_THRS_CRITICAL_HYST:
 285                 therm->bios_sensor.thrs_critical.hysteresis = value;
 286                 therm->func->program_alarms(therm);
 287                 return 0;
 288         case NVKM_THERM_ATTR_THRS_SHUTDOWN:
 289                 therm->bios_sensor.thrs_shutdown.temp = value;
 290                 therm->func->program_alarms(therm);
 291                 return 0;
 292         case NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST:
 293                 therm->bios_sensor.thrs_shutdown.hysteresis = value;
 294                 therm->func->program_alarms(therm);
 295                 return 0;
 296         }
 297
 298         return -EINVAL;
 299 }
 300
 301 void
 302 nvkm_therm_clkgate_enable(struct nvkm_therm *therm)
 303 {
 304         if (!therm || !therm->func->clkgate_enable || !therm->clkgating_enabled)
 305                 return;
 306
 307         nvkm_debug(&therm->subdev,
 308                    "Enabling clockgating\n");
 309         therm->func->clkgate_enable(therm);
 310 }
 311
 312 void
 313 nvkm_therm_clkgate_fini(struct nvkm_therm *therm, bool suspend)
 314 {
 315         if (!therm || !therm->func->clkgate_fini || !therm->clkgating_enabled)
 316                 return;
 317
 318         nvkm_debug(&therm->subdev,
 319                    "Preparing clockgating for %s\n",
 320                    suspend ? "suspend" : "fini");
 321         therm->func->clkgate_fini(therm, suspend);
 322 }
 323
 324 static void
 325 nvkm_therm_clkgate_oneinit(struct nvkm_therm *therm)
 326 {
 327         if (!therm->func->clkgate_enable || !therm->clkgating_enabled)
 328                 return;
 329
 330         nvkm_info(&therm->subdev, "Clockgating enabled\n");
 331 }
 332
 333 static void
 334 nvkm_therm_intr(struct nvkm_subdev *subdev)
 335 {
 336         struct nvkm_therm *therm = nvkm_therm(subdev);
 337         if (therm->func->intr)
 338                 therm->func->intr(therm);
 339 }
 340
 341 static int
 342 nvkm_therm_fini(struct nvkm_subdev *subdev, bool suspend)
 343 {
 344         struct nvkm_therm *therm = nvkm_therm(subdev);
 345
 346         if (therm->func->fini)
 347                 therm->func->fini(therm);
 348
 349         nvkm_therm_fan_fini(therm, suspend);
 350         nvkm_therm_sensor_fini(therm, suspend);
 351
 352         if (suspend) {
 353                 therm->suspend = therm->mode;
 354                 therm->mode = NVKM_THERM_CTRL_NONE;
 355         }
 356
 357         return 0;
 358 }
 359
 360 static int
 361 nvkm_therm_oneinit(struct nvkm_subdev *subdev)
 362 {
 363         struct nvkm_therm *therm = nvkm_therm(subdev);
 364         nvkm_therm_sensor_ctor(therm);
 365         nvkm_therm_ic_ctor(therm);
 366         nvkm_therm_fan_ctor(therm);
 367         nvkm_therm_fan_mode(therm, NVKM_THERM_CTRL_AUTO);
 368         nvkm_therm_sensor_preinit(therm);
 369         nvkm_therm_clkgate_oneinit(therm);
 370         return 0;
 371 }
 372
 373 static int
 374 nvkm_therm_init(struct nvkm_subdev *subdev)
 375 {
 376         struct nvkm_therm *therm = nvkm_therm(subdev);
 377
 378         if (therm->func->init)
 379                 therm->func->init(therm);
 380
 381         if (therm->suspend >= 0) {
 382                 /* restore the pwm value only when on manual or auto mode */
 383                 if (therm->suspend > 0)
 384                         nvkm_therm_fan_set(therm, true, therm->fan->percent);
 385
 386                 nvkm_therm_fan_mode(therm, therm->suspend);
 387         }
 388
 389         nvkm_therm_sensor_init(therm);
 390         nvkm_therm_fan_init(therm);
 391         return 0;
 392 }
 393
 394 void
 395 nvkm_therm_clkgate_init(struct nvkm_therm *therm,
 396                         const struct nvkm_therm_clkgate_pack *p)
 397 {
 398         if (!therm || !therm->func->clkgate_init || !therm->clkgating_enabled)
 399                 return;
 400
 401         therm->func->clkgate_init(therm, p);
 402 }
 403
 404 static void *
 405 nvkm_therm_dtor(struct nvkm_subdev *subdev)
 406 {
 407         struct nvkm_therm *therm = nvkm_therm(subdev);
 408         kfree(therm->fan);
 409         return therm;
 410 }
 411
 412 static const struct nvkm_subdev_func
 413 nvkm_therm = {
 414         .dtor = nvkm_therm_dtor,
 415         .oneinit = nvkm_therm_oneinit,
 416         .init = nvkm_therm_init,
 417         .fini = nvkm_therm_fini,
 418         .intr = nvkm_therm_intr,
 419 };
 420
 421 void
 422 nvkm_therm_ctor(struct nvkm_therm *therm, struct nvkm_device *device,
 423                 int index, const struct nvkm_therm_func *func)
 424 {
 425         nvkm_subdev_ctor(&nvkm_therm, device, index, &therm->subdev);
 426         therm->func = func;
 427
 428         nvkm_alarm_init(&therm->alarm, nvkm_therm_alarm);
 429         spin_lock_init(&therm->lock);
 430         spin_lock_init(&therm->sensor.alarm_program_lock);
 431
 432         therm->fan_get = nvkm_therm_fan_user_get;
 433         therm->fan_set = nvkm_therm_fan_user_set;
 434         therm->attr_get = nvkm_therm_attr_get;
 435         therm->attr_set = nvkm_therm_attr_set;
 436         therm->mode = therm->suspend = -1; /* undefined */
 437
 438         therm->clkgating_enabled = nvkm_boolopt(device->cfgopt,
 439                                                 "NvPmEnableGating", false);
 440 }
 441
 442 int
 443 nvkm_therm_new_(const struct nvkm_therm_func *func, struct nvkm_device *device,
 444                 int index, struct nvkm_therm **ptherm)
 445 {
 446         struct nvkm_therm *therm;
 447
 448         if (!(therm = *ptherm = kzalloc(sizeof(*therm), GFP_KERNEL)))
 449                 return -ENOMEM;
 450
 451         nvkm_therm_ctor(therm, device, index, func);
 452         return 0;
 453 }