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 "priv.h"
  25
  26#include <core/option.h>
  27#include <subdev/pmu.h>
  28
  29int
  30nvkm_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
  37static int
  38nvkm_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
  69static int
  70nvkm_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
  90static int
  91nvkm_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
  98static int
  99nvkm_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
 105static void
 106nvkm_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
 163int
 164nvkm_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
 176static void
 177nvkm_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
 184int
 185nvkm_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
 214int
 215nvkm_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
 245int
 246nvkm_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
 303void
 304nvkm_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
 314void
 315nvkm_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
 326static void
 327nvkm_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
 335static void
 336nvkm_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
 343static int
 344nvkm_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
 362static int
 363nvkm_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
 375static int
 376nvkm_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
 396void
 397nvkm_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
 406static void *
 407nvkm_therm_dtor(struct nvkm_subdev *subdev)
 408{
 409        struct nvkm_therm *therm = nvkm_therm(subdev);
 410        kfree(therm->fan);
 411        return therm;
 412}
 413
 414static const struct nvkm_subdev_func
 415nvkm_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
 423void
 424nvkm_therm_ctor(struct nvkm_therm *therm, struct nvkm_device *device, enum nvkm_subdev_type type,
 425                int inst, const struct nvkm_therm_func *func)
 426{
 427        nvkm_subdev_ctor(&nvkm_therm, device, type, inst, &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
 444int
 445nvkm_therm_new_(const struct nvkm_therm_func *func, struct nvkm_device *device,
 446                enum nvkm_subdev_type type, int inst, 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, type, inst, func);
 454        return 0;
 455}
 456