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
  26int
  27nvkm_therm_temp_get(struct nvkm_therm *therm)
  28{
  29        if (therm->func->temp_get)
  30                return therm->func->temp_get(therm);
  31        return -ENODEV;
  32}
  33
  34static int
  35nvkm_therm_update_trip(struct nvkm_therm *therm)
  36{
  37        struct nvbios_therm_trip_point *trip = therm->fan->bios.trip,
  38                                       *cur_trip = NULL,
  39                                       *last_trip = therm->last_trip;
  40        u8  temp = therm->func->temp_get(therm);
  41        u16 duty, i;
  42
  43        /* look for the trip point corresponding to the current temperature */
  44        cur_trip = NULL;
  45        for (i = 0; i < therm->fan->bios.nr_fan_trip; i++) {
  46                if (temp >= trip[i].temp)
  47                        cur_trip = &trip[i];
  48        }
  49
  50        /* account for the hysteresis cycle */
  51        if (last_trip && temp <= (last_trip->temp) &&
  52            temp > (last_trip->temp - last_trip->hysteresis))
  53                cur_trip = last_trip;
  54
  55        if (cur_trip) {
  56                duty = cur_trip->fan_duty;
  57                therm->last_trip = cur_trip;
  58        } else {
  59                duty = 0;
  60                therm->last_trip = NULL;
  61        }
  62
  63        return duty;
  64}
  65
  66static int
  67nvkm_therm_compute_linear_duty(struct nvkm_therm *therm, u8 linear_min_temp,
  68                               u8 linear_max_temp)
  69{
  70        u8  temp = therm->func->temp_get(therm);
  71        u16 duty;
  72
  73        /* handle the non-linear part first */
  74        if (temp < linear_min_temp)
  75                return therm->fan->bios.min_duty;
  76        else if (temp > linear_max_temp)
  77                return therm->fan->bios.max_duty;
  78
  79        /* we are in the linear zone */
  80        duty  = (temp - linear_min_temp);
  81        duty *= (therm->fan->bios.max_duty - therm->fan->bios.min_duty);
  82        duty /= (linear_max_temp - linear_min_temp);
  83        duty += therm->fan->bios.min_duty;
  84        return duty;
  85}
  86
  87static int
  88nvkm_therm_update_linear(struct nvkm_therm *therm)
  89{
  90        u8  min = therm->fan->bios.linear_min_temp;
  91        u8  max = therm->fan->bios.linear_max_temp;
  92        return nvkm_therm_compute_linear_duty(therm, min, max);
  93}
  94
  95static int
  96nvkm_therm_update_linear_fallback(struct nvkm_therm *therm)
  97{
  98        u8 max = therm->bios_sensor.thrs_fan_boost.temp;
  99        return nvkm_therm_compute_linear_duty(therm, 30, max);
 100}
 101
 102static void
 103nvkm_therm_update(struct nvkm_therm *therm, int mode)
 104{
 105        struct nvkm_subdev *subdev = &therm->subdev;
 106        struct nvkm_timer *tmr = subdev->device->timer;
 107        unsigned long flags;
 108        bool immd = true;
 109        bool poll = true;
 110        int duty = -1;
 111
 112        spin_lock_irqsave(&therm->lock, flags);
 113        if (mode < 0)
 114                mode = therm->mode;
 115        therm->mode = mode;
 116
 117        switch (mode) {
 118        case NVKM_THERM_CTRL_MANUAL:
 119                nvkm_timer_alarm_cancel(tmr, &therm->alarm);
 120                duty = nvkm_therm_fan_get(therm);
 121                if (duty < 0)
 122                        duty = 100;
 123                poll = false;
 124                break;
 125        case NVKM_THERM_CTRL_AUTO:
 126                switch(therm->fan->bios.fan_mode) {
 127                case NVBIOS_THERM_FAN_TRIP:
 128                        duty = nvkm_therm_update_trip(therm);
 129                        break;
 130                case NVBIOS_THERM_FAN_LINEAR:
 131                        duty = nvkm_therm_update_linear(therm);
 132                        break;
 133                case NVBIOS_THERM_FAN_OTHER:
 134                        if (therm->cstate)
 135                                duty = therm->cstate;
 136                        else
 137                                duty = nvkm_therm_update_linear_fallback(therm);
 138                        poll = false;
 139                        break;
 140                }
 141                immd = false;
 142                break;
 143        case NVKM_THERM_CTRL_NONE:
 144        default:
 145                nvkm_timer_alarm_cancel(tmr, &therm->alarm);
 146                poll = false;
 147        }
 148
 149        if (list_empty(&therm->alarm.head) && poll)
 150                nvkm_timer_alarm(tmr, 1000000000ULL, &therm->alarm);
 151        spin_unlock_irqrestore(&therm->lock, flags);
 152
 153        if (duty >= 0) {
 154                nvkm_debug(subdev, "FAN target request: %d%%\n", duty);
 155                nvkm_therm_fan_set(therm, immd, duty);
 156        }
 157}
 158
 159int
 160nvkm_therm_cstate(struct nvkm_therm *therm, int fan, int dir)
 161{
 162        struct nvkm_subdev *subdev = &therm->subdev;
 163        if (!dir || (dir < 0 && fan < therm->cstate) ||
 164                    (dir > 0 && fan > therm->cstate)) {
 165                nvkm_debug(subdev, "default fan speed -> %d%%\n", fan);
 166                therm->cstate = fan;
 167                nvkm_therm_update(therm, -1);
 168        }
 169        return 0;
 170}
 171
 172static void
 173nvkm_therm_alarm(struct nvkm_alarm *alarm)
 174{
 175        struct nvkm_therm *therm =
 176               container_of(alarm, struct nvkm_therm, alarm);
 177        nvkm_therm_update(therm, -1);
 178}
 179
 180int
 181nvkm_therm_fan_mode(struct nvkm_therm *therm, int mode)
 182{
 183        struct nvkm_subdev *subdev = &therm->subdev;
 184        struct nvkm_device *device = subdev->device;
 185        static const char *name[] = {
 186                "disabled",
 187                "manual",
 188                "automatic"
 189        };
 190
 191        /* The default PPWR ucode on fermi interferes with fan management */
 192        if ((mode >= ARRAY_SIZE(name)) ||
 193            (mode != NVKM_THERM_CTRL_NONE && device->card_type >= NV_C0 &&
 194             !device->pmu))
 195                return -EINVAL;
 196
 197        /* do not allow automatic fan management if the thermal sensor is
 198         * not available */
 199        if (mode == NVKM_THERM_CTRL_AUTO &&
 200            therm->func->temp_get(therm) < 0)
 201                return -EINVAL;
 202
 203        if (therm->mode == mode)
 204                return 0;
 205
 206        nvkm_debug(subdev, "fan management: %s\n", name[mode]);
 207        nvkm_therm_update(therm, mode);
 208        return 0;
 209}
 210
 211int
 212nvkm_therm_attr_get(struct nvkm_therm *therm, enum nvkm_therm_attr_type type)
 213{
 214        switch (type) {
 215        case NVKM_THERM_ATTR_FAN_MIN_DUTY:
 216                return therm->fan->bios.min_duty;
 217        case NVKM_THERM_ATTR_FAN_MAX_DUTY:
 218                return therm->fan->bios.max_duty;
 219        case NVKM_THERM_ATTR_FAN_MODE:
 220                return therm->mode;
 221        case NVKM_THERM_ATTR_THRS_FAN_BOOST:
 222                return therm->bios_sensor.thrs_fan_boost.temp;
 223        case NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST:
 224                return therm->bios_sensor.thrs_fan_boost.hysteresis;
 225        case NVKM_THERM_ATTR_THRS_DOWN_CLK:
 226                return therm->bios_sensor.thrs_down_clock.temp;
 227        case NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST:
 228                return therm->bios_sensor.thrs_down_clock.hysteresis;
 229        case NVKM_THERM_ATTR_THRS_CRITICAL:
 230                return therm->bios_sensor.thrs_critical.temp;
 231        case NVKM_THERM_ATTR_THRS_CRITICAL_HYST:
 232                return therm->bios_sensor.thrs_critical.hysteresis;
 233        case NVKM_THERM_ATTR_THRS_SHUTDOWN:
 234                return therm->bios_sensor.thrs_shutdown.temp;
 235        case NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST:
 236                return therm->bios_sensor.thrs_shutdown.hysteresis;
 237        }
 238
 239        return -EINVAL;
 240}
 241
 242int
 243nvkm_therm_attr_set(struct nvkm_therm *therm,
 244                    enum nvkm_therm_attr_type type, int value)
 245{
 246        switch (type) {
 247        case NVKM_THERM_ATTR_FAN_MIN_DUTY:
 248                if (value < 0)
 249                        value = 0;
 250                if (value > therm->fan->bios.max_duty)
 251                        value = therm->fan->bios.max_duty;
 252                therm->fan->bios.min_duty = value;
 253                return 0;
 254        case NVKM_THERM_ATTR_FAN_MAX_DUTY:
 255                if (value < 0)
 256                        value = 0;
 257                if (value < therm->fan->bios.min_duty)
 258                        value = therm->fan->bios.min_duty;
 259                therm->fan->bios.max_duty = value;
 260                return 0;
 261        case NVKM_THERM_ATTR_FAN_MODE:
 262                return nvkm_therm_fan_mode(therm, value);
 263        case NVKM_THERM_ATTR_THRS_FAN_BOOST:
 264                therm->bios_sensor.thrs_fan_boost.temp = value;
 265                therm->func->program_alarms(therm);
 266                return 0;
 267        case NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST:
 268                therm->bios_sensor.thrs_fan_boost.hysteresis = value;
 269                therm->func->program_alarms(therm);
 270                return 0;
 271        case NVKM_THERM_ATTR_THRS_DOWN_CLK:
 272                therm->bios_sensor.thrs_down_clock.temp = value;
 273                therm->func->program_alarms(therm);
 274                return 0;
 275        case NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST:
 276                therm->bios_sensor.thrs_down_clock.hysteresis = value;
 277                therm->func->program_alarms(therm);
 278                return 0;
 279        case NVKM_THERM_ATTR_THRS_CRITICAL:
 280                therm->bios_sensor.thrs_critical.temp = value;
 281                therm->func->program_alarms(therm);
 282                return 0;
 283        case NVKM_THERM_ATTR_THRS_CRITICAL_HYST:
 284                therm->bios_sensor.thrs_critical.hysteresis = value;
 285                therm->func->program_alarms(therm);
 286                return 0;
 287        case NVKM_THERM_ATTR_THRS_SHUTDOWN:
 288                therm->bios_sensor.thrs_shutdown.temp = value;
 289                therm->func->program_alarms(therm);
 290                return 0;
 291        case NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST:
 292                therm->bios_sensor.thrs_shutdown.hysteresis = value;
 293                therm->func->program_alarms(therm);
 294                return 0;
 295        }
 296
 297        return -EINVAL;
 298}
 299
 300static void
 301nvkm_therm_intr(struct nvkm_subdev *subdev)
 302{
 303        struct nvkm_therm *therm = nvkm_therm(subdev);
 304        if (therm->func->intr)
 305                therm->func->intr(therm);
 306}
 307
 308static int
 309nvkm_therm_fini(struct nvkm_subdev *subdev, bool suspend)
 310{
 311        struct nvkm_therm *therm = nvkm_therm(subdev);
 312
 313        if (therm->func->fini)
 314                therm->func->fini(therm);
 315
 316        nvkm_therm_fan_fini(therm, suspend);
 317        nvkm_therm_sensor_fini(therm, suspend);
 318
 319        if (suspend) {
 320                therm->suspend = therm->mode;
 321                therm->mode = NVKM_THERM_CTRL_NONE;
 322        }
 323
 324        return 0;
 325}
 326
 327static int
 328nvkm_therm_oneinit(struct nvkm_subdev *subdev)
 329{
 330        struct nvkm_therm *therm = nvkm_therm(subdev);
 331        nvkm_therm_sensor_ctor(therm);
 332        nvkm_therm_ic_ctor(therm);
 333        nvkm_therm_fan_ctor(therm);
 334        nvkm_therm_fan_mode(therm, NVKM_THERM_CTRL_AUTO);
 335        nvkm_therm_sensor_preinit(therm);
 336        return 0;
 337}
 338
 339static int
 340nvkm_therm_init(struct nvkm_subdev *subdev)
 341{
 342        struct nvkm_therm *therm = nvkm_therm(subdev);
 343
 344        therm->func->init(therm);
 345
 346        if (therm->suspend >= 0) {
 347                /* restore the pwm value only when on manual or auto mode */
 348                if (therm->suspend > 0)
 349                        nvkm_therm_fan_set(therm, true, therm->fan->percent);
 350
 351                nvkm_therm_fan_mode(therm, therm->suspend);
 352        }
 353
 354        nvkm_therm_sensor_init(therm);
 355        nvkm_therm_fan_init(therm);
 356        return 0;
 357}
 358
 359static void *
 360nvkm_therm_dtor(struct nvkm_subdev *subdev)
 361{
 362        struct nvkm_therm *therm = nvkm_therm(subdev);
 363        kfree(therm->fan);
 364        return therm;
 365}
 366
 367static const struct nvkm_subdev_func
 368nvkm_therm = {
 369        .dtor = nvkm_therm_dtor,
 370        .oneinit = nvkm_therm_oneinit,
 371        .init = nvkm_therm_init,
 372        .fini = nvkm_therm_fini,
 373        .intr = nvkm_therm_intr,
 374};
 375
 376int
 377nvkm_therm_new_(const struct nvkm_therm_func *func, struct nvkm_device *device,
 378                int index, struct nvkm_therm **ptherm)
 379{
 380        struct nvkm_therm *therm;
 381
 382        if (!(therm = *ptherm = kzalloc(sizeof(*therm), GFP_KERNEL)))
 383                return -ENOMEM;
 384
 385        nvkm_subdev_ctor(&nvkm_therm, device, index, &therm->subdev);
 386        therm->func = func;
 387
 388        nvkm_alarm_init(&therm->alarm, nvkm_therm_alarm);
 389        spin_lock_init(&therm->lock);
 390        spin_lock_init(&therm->sensor.alarm_program_lock);
 391
 392        therm->fan_get = nvkm_therm_fan_user_get;
 393        therm->fan_set = nvkm_therm_fan_user_set;
 394        therm->attr_get = nvkm_therm_attr_get;
 395        therm->attr_set = nvkm_therm_attr_set;
 396        therm->mode = therm->suspend = -1; /* undefined */
 397        return 0;
 398}
 399