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1/*2 * Copyright 2012 The Nouveau community3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * 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 OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: Martin Peres23 */24#include "priv.h"25 26#include <core/option.h>27#include <subdev/pmu.h>28 29int30nvkm_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 int38nvkm_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 int70nvkm_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 int91nvkm_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 int99nvkm_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 void106nvkm_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 163int164nvkm_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 void177nvkm_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 184int185nvkm_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 is201 * 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 214int215nvkm_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 245int246nvkm_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 303void304nvkm_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 314void315nvkm_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 void327nvkm_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 void336nvkm_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 int344nvkm_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 int363nvkm_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 int376nvkm_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 396void397nvkm_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_func415nvkm_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 423void424nvkm_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 444int445nvkm_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