LXR linux/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
  27int
  28nvkm_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
  35static int
  36nvkm_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
  67static int
  68nvkm_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
  88static int
  89nvkm_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
  96static int
  97nvkm_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
 103static void
 104nvkm_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
 161int
 162nvkm_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
 174static void
 175nvkm_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
 182int
 183nvkm_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
 213int
 214nvkm_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
 244int
 245nvkm_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
 302void
 303nvkm_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
 313void
 314nvkm_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
 325static void
 326nvkm_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
 334static void
 335nvkm_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
 342static int
 343nvkm_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
 361static int
 362nvkm_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
 374static int
 375nvkm_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
 395void
 396nvkm_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
 405static void *
 406nvkm_therm_dtor(struct nvkm_subdev *subdev)
 407{
 408        struct nvkm_therm *therm = nvkm_therm(subdev);
 409        kfree(therm->fan);
 410        return therm;
 411}
 412
 413static const struct nvkm_subdev_func
 414nvkm_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
 422void
 423nvkm_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
 443int
 444nvkm_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}
 455