root/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_thermal.c

DEFINITIONS

1. smu7_fan_ctrl_get_fan_speed_info
2. smu7_fan_ctrl_get_fan_speed_percent
3. smu7_fan_ctrl_get_fan_speed_rpm
4. smu7_fan_ctrl_set_static_mode
5. smu7_fan_ctrl_set_default_mode
6. smu7_fan_ctrl_start_smc_fan_control
7. smu7_fan_ctrl_stop_smc_fan_control
8. smu7_fan_ctrl_set_fan_speed_percent
9. smu7_fan_ctrl_reset_fan_speed_to_default
10. smu7_fan_ctrl_set_fan_speed_rpm
11. smu7_thermal_get_temperature
12. smu7_thermal_set_temperature_range
13. smu7_thermal_initialize
14. smu7_thermal_enable_alert
15. smu7_thermal_disable_alert
16. smu7_thermal_stop_thermal_controller
17. smu7_thermal_start_smc_fan_control
18. smu7_start_thermal_controller
19. smu7_thermal_ctrl_uninitialize_thermal_controller

   1 /*
   2  * Copyright 2016 Advanced Micro Devices, Inc.
   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  */
  23 
  24 #include <asm/div64.h>
  25 #include "smu7_thermal.h"
  26 #include "smu7_hwmgr.h"
  27 #include "smu7_common.h"
  28 
  29 int smu7_fan_ctrl_get_fan_speed_info(struct pp_hwmgr *hwmgr,
  30                 struct phm_fan_speed_info *fan_speed_info)
  31 {
  32         if (hwmgr->thermal_controller.fanInfo.bNoFan)
  33                 return -ENODEV;
  34 
  35         fan_speed_info->supports_percent_read = true;
  36         fan_speed_info->supports_percent_write = true;
  37         fan_speed_info->min_percent = 0;
  38         fan_speed_info->max_percent = 100;
  39 
  40         if (PP_CAP(PHM_PlatformCaps_FanSpeedInTableIsRPM) &&
  41             hwmgr->thermal_controller.fanInfo.ucTachometerPulsesPerRevolution) {
  42                 fan_speed_info->supports_rpm_read = true;
  43                 fan_speed_info->supports_rpm_write = true;
  44                 fan_speed_info->min_rpm = hwmgr->thermal_controller.fanInfo.ulMinRPM;
  45                 fan_speed_info->max_rpm = hwmgr->thermal_controller.fanInfo.ulMaxRPM;
  46         } else {
  47                 fan_speed_info->min_rpm = 0;
  48                 fan_speed_info->max_rpm = 0;
  49         }
  50 
  51         return 0;
  52 }
  53 
  54 int smu7_fan_ctrl_get_fan_speed_percent(struct pp_hwmgr *hwmgr,
  55                 uint32_t *speed)
  56 {
  57         uint32_t duty100;
  58         uint32_t duty;
  59         uint64_t tmp64;
  60 
  61         if (hwmgr->thermal_controller.fanInfo.bNoFan)
  62                 return -ENODEV;
  63 
  64         duty100 = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
  65                         CG_FDO_CTRL1, FMAX_DUTY100);
  66         duty = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
  67                         CG_THERMAL_STATUS, FDO_PWM_DUTY);
  68 
  69         if (duty100 == 0)
  70                 return -EINVAL;
  71 
  72 
  73         tmp64 = (uint64_t)duty * 100;
  74         do_div(tmp64, duty100);
  75         *speed = (uint32_t)tmp64;
  76 
  77         if (*speed > 100)
  78                 *speed = 100;
  79 
  80         return 0;
  81 }
  82 
  83 int smu7_fan_ctrl_get_fan_speed_rpm(struct pp_hwmgr *hwmgr, uint32_t *speed)
  84 {
  85         uint32_t tach_period;
  86         uint32_t crystal_clock_freq;
  87 
  88         if (hwmgr->thermal_controller.fanInfo.bNoFan ||
  89             !hwmgr->thermal_controller.fanInfo.ucTachometerPulsesPerRevolution)
  90                 return -ENODEV;
  91 
  92         tach_period = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
  93                         CG_TACH_STATUS, TACH_PERIOD);
  94 
  95         if (tach_period == 0)
  96                 return -EINVAL;
  97 
  98         crystal_clock_freq = amdgpu_asic_get_xclk((struct amdgpu_device *)hwmgr->adev);
  99 
 100         *speed = 60 * crystal_clock_freq * 10000 / tach_period;
 101 
 102         return 0;
 103 }
 104 
 105 /**
 106 * Set Fan Speed Control to static mode, so that the user can decide what speed to use.
 107 * @param    hwmgr  the address of the powerplay hardware manager.
 108 *           mode    the fan control mode, 0 default, 1 by percent, 5, by RPM
 109 * @exception Should always succeed.
 110 */
 111 int smu7_fan_ctrl_set_static_mode(struct pp_hwmgr *hwmgr, uint32_t mode)
 112 {
 113         if (hwmgr->fan_ctrl_is_in_default_mode) {
 114                 hwmgr->fan_ctrl_default_mode =
 115                                 PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 116                                                 CG_FDO_CTRL2, FDO_PWM_MODE);
 117                 hwmgr->tmin =
 118                                 PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 119                                                 CG_FDO_CTRL2, TMIN);
 120                 hwmgr->fan_ctrl_is_in_default_mode = false;
 121         }
 122 
 123         PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 124                         CG_FDO_CTRL2, TMIN, 0);
 125         PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 126                         CG_FDO_CTRL2, FDO_PWM_MODE, mode);
 127 
 128         return 0;
 129 }
 130 
 131 /**
 132 * Reset Fan Speed Control to default mode.
 133 * @param    hwmgr  the address of the powerplay hardware manager.
 134 * @exception Should always succeed.
 135 */
 136 int smu7_fan_ctrl_set_default_mode(struct pp_hwmgr *hwmgr)
 137 {
 138         if (!hwmgr->fan_ctrl_is_in_default_mode) {
 139                 PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 140                                 CG_FDO_CTRL2, FDO_PWM_MODE, hwmgr->fan_ctrl_default_mode);
 141                 PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 142                                 CG_FDO_CTRL2, TMIN, hwmgr->tmin);
 143                 hwmgr->fan_ctrl_is_in_default_mode = true;
 144         }
 145 
 146         return 0;
 147 }
 148 
 149 int smu7_fan_ctrl_start_smc_fan_control(struct pp_hwmgr *hwmgr)
 150 {
 151         int result;
 152 
 153         if (PP_CAP(PHM_PlatformCaps_ODFuzzyFanControlSupport)) {
 154                 cgs_write_register(hwmgr->device, mmSMC_MSG_ARG_0, FAN_CONTROL_FUZZY);
 155                 result = smum_send_msg_to_smc(hwmgr, PPSMC_StartFanControl);
 156 
 157                 if (PP_CAP(PHM_PlatformCaps_FanSpeedInTableIsRPM))
 158                         hwmgr->hwmgr_func->set_max_fan_rpm_output(hwmgr,
 159                                         hwmgr->thermal_controller.
 160                                         advanceFanControlParameters.usMaxFanRPM);
 161                 else
 162                         hwmgr->hwmgr_func->set_max_fan_pwm_output(hwmgr,
 163                                         hwmgr->thermal_controller.
 164                                         advanceFanControlParameters.usMaxFanPWM);
 165 
 166         } else {
 167                 cgs_write_register(hwmgr->device, mmSMC_MSG_ARG_0, FAN_CONTROL_TABLE);
 168                 result = smum_send_msg_to_smc(hwmgr, PPSMC_StartFanControl);
 169         }
 170 
 171         if (!result && hwmgr->thermal_controller.
 172                         advanceFanControlParameters.ucTargetTemperature)
 173                 result = smum_send_msg_to_smc_with_parameter(hwmgr,
 174                                 PPSMC_MSG_SetFanTemperatureTarget,
 175                                 hwmgr->thermal_controller.
 176                                 advanceFanControlParameters.ucTargetTemperature);
 177         hwmgr->fan_ctrl_enabled = true;
 178 
 179         return result;
 180 }
 181 
 182 
 183 int smu7_fan_ctrl_stop_smc_fan_control(struct pp_hwmgr *hwmgr)
 184 {
 185         hwmgr->fan_ctrl_enabled = false;
 186         return smum_send_msg_to_smc(hwmgr, PPSMC_StopFanControl);
 187 }
 188 
 189 /**
 190 * Set Fan Speed in percent.
 191 * @param    hwmgr  the address of the powerplay hardware manager.
 192 * @param    speed is the percentage value (0% - 100%) to be set.
 193 * @exception Fails is the 100% setting appears to be 0.
 194 */
 195 int smu7_fan_ctrl_set_fan_speed_percent(struct pp_hwmgr *hwmgr,
 196                 uint32_t speed)
 197 {
 198         uint32_t duty100;
 199         uint32_t duty;
 200         uint64_t tmp64;
 201 
 202         if (hwmgr->thermal_controller.fanInfo.bNoFan)
 203                 return 0;
 204 
 205         if (speed > 100)
 206                 speed = 100;
 207 
 208         if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl))
 209                 smu7_fan_ctrl_stop_smc_fan_control(hwmgr);
 210 
 211         duty100 = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 212                         CG_FDO_CTRL1, FMAX_DUTY100);
 213 
 214         if (duty100 == 0)
 215                 return -EINVAL;
 216 
 217         tmp64 = (uint64_t)speed * duty100;
 218         do_div(tmp64, 100);
 219         duty = (uint32_t)tmp64;
 220 
 221         PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 222                         CG_FDO_CTRL0, FDO_STATIC_DUTY, duty);
 223 
 224         return smu7_fan_ctrl_set_static_mode(hwmgr, FDO_PWM_MODE_STATIC);
 225 }
 226 
 227 /**
 228 * Reset Fan Speed to default.
 229 * @param    hwmgr  the address of the powerplay hardware manager.
 230 * @exception Always succeeds.
 231 */
 232 int smu7_fan_ctrl_reset_fan_speed_to_default(struct pp_hwmgr *hwmgr)
 233 {
 234         int result;
 235 
 236         if (hwmgr->thermal_controller.fanInfo.bNoFan)
 237                 return 0;
 238 
 239         if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl)) {
 240                 result = smu7_fan_ctrl_set_static_mode(hwmgr, FDO_PWM_MODE_STATIC);
 241                 if (!result)
 242                         result = smu7_fan_ctrl_start_smc_fan_control(hwmgr);
 243         } else
 244                 result = smu7_fan_ctrl_set_default_mode(hwmgr);
 245 
 246         return result;
 247 }
 248 
 249 /**
 250 * Set Fan Speed in RPM.
 251 * @param    hwmgr  the address of the powerplay hardware manager.
 252 * @param    speed is the percentage value (min - max) to be set.
 253 * @exception Fails is the speed not lie between min and max.
 254 */
 255 int smu7_fan_ctrl_set_fan_speed_rpm(struct pp_hwmgr *hwmgr, uint32_t speed)
 256 {
 257         uint32_t tach_period;
 258         uint32_t crystal_clock_freq;
 259 
 260         if (hwmgr->thermal_controller.fanInfo.bNoFan ||
 261                         (hwmgr->thermal_controller.fanInfo.
 262                         ucTachometerPulsesPerRevolution == 0) ||
 263                         speed == 0 ||
 264                         (speed < hwmgr->thermal_controller.fanInfo.ulMinRPM) ||
 265                         (speed > hwmgr->thermal_controller.fanInfo.ulMaxRPM))
 266                 return 0;
 267 
 268         if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl))
 269                 smu7_fan_ctrl_stop_smc_fan_control(hwmgr);
 270 
 271         crystal_clock_freq = amdgpu_asic_get_xclk((struct amdgpu_device *)hwmgr->adev);
 272 
 273         tach_period = 60 * crystal_clock_freq * 10000 / (8 * speed);
 274 
 275         PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 276                                 CG_TACH_CTRL, TARGET_PERIOD, tach_period);
 277 
 278         return smu7_fan_ctrl_set_static_mode(hwmgr, FDO_PWM_MODE_STATIC_RPM);
 279 }
 280 
 281 /**
 282 * Reads the remote temperature from the SIslands thermal controller.
 283 *
 284 * @param    hwmgr The address of the hardware manager.
 285 */
 286 int smu7_thermal_get_temperature(struct pp_hwmgr *hwmgr)
 287 {
 288         int temp;
 289 
 290         temp = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 291                         CG_MULT_THERMAL_STATUS, CTF_TEMP);
 292 
 293         /* Bit 9 means the reading is lower than the lowest usable value. */
 294         if (temp & 0x200)
 295                 temp = SMU7_THERMAL_MAXIMUM_TEMP_READING;
 296         else
 297                 temp = temp & 0x1ff;
 298 
 299         temp *= PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
 300 
 301         return temp;
 302 }
 303 
 304 /**
 305 * Set the requested temperature range for high and low alert signals
 306 *
 307 * @param    hwmgr The address of the hardware manager.
 308 * @param    range Temperature range to be programmed for high and low alert signals
 309 * @exception PP_Result_BadInput if the input data is not valid.
 310 */
 311 static int smu7_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
 312                 int low_temp, int high_temp)
 313 {
 314         int low = SMU7_THERMAL_MINIMUM_ALERT_TEMP *
 315                         PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
 316         int high = SMU7_THERMAL_MAXIMUM_ALERT_TEMP *
 317                         PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
 318 
 319         if (low < low_temp)
 320                 low = low_temp;
 321         if (high > high_temp)
 322                 high = high_temp;
 323 
 324         if (low > high)
 325                 return -EINVAL;
 326 
 327         PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 328                         CG_THERMAL_INT, DIG_THERM_INTH,
 329                         (high / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));
 330         PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 331                         CG_THERMAL_INT, DIG_THERM_INTL,
 332                         (low / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));
 333         PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 334                         CG_THERMAL_CTRL, DIG_THERM_DPM,
 335                         (high / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));
 336 
 337         return 0;
 338 }
 339 
 340 /**
 341 * Programs thermal controller one-time setting registers
 342 *
 343 * @param    hwmgr The address of the hardware manager.
 344 */
 345 static int smu7_thermal_initialize(struct pp_hwmgr *hwmgr)
 346 {
 347         if (hwmgr->thermal_controller.fanInfo.ucTachometerPulsesPerRevolution)
 348                 PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 349                                 CG_TACH_CTRL, EDGE_PER_REV,
 350                                 hwmgr->thermal_controller.fanInfo.
 351                                 ucTachometerPulsesPerRevolution - 1);
 352 
 353         PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 354                         CG_FDO_CTRL2, TACH_PWM_RESP_RATE, 0x28);
 355 
 356         return 0;
 357 }
 358 
 359 /**
 360 * Enable thermal alerts on the RV770 thermal controller.
 361 *
 362 * @param    hwmgr The address of the hardware manager.
 363 */
 364 static void smu7_thermal_enable_alert(struct pp_hwmgr *hwmgr)
 365 {
 366         uint32_t alert;
 367 
 368         alert = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 369                         CG_THERMAL_INT, THERM_INT_MASK);
 370         alert &= ~(SMU7_THERMAL_HIGH_ALERT_MASK | SMU7_THERMAL_LOW_ALERT_MASK);
 371         PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 372                         CG_THERMAL_INT, THERM_INT_MASK, alert);
 373 
 374         /* send message to SMU to enable internal thermal interrupts */
 375         smum_send_msg_to_smc(hwmgr, PPSMC_MSG_Thermal_Cntl_Enable);
 376 }
 377 
 378 /**
 379 * Disable thermal alerts on the RV770 thermal controller.
 380 * @param    hwmgr The address of the hardware manager.
 381 */
 382 int smu7_thermal_disable_alert(struct pp_hwmgr *hwmgr)
 383 {
 384         uint32_t alert;
 385 
 386         alert = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 387                         CG_THERMAL_INT, THERM_INT_MASK);
 388         alert |= (SMU7_THERMAL_HIGH_ALERT_MASK | SMU7_THERMAL_LOW_ALERT_MASK);
 389         PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 390                         CG_THERMAL_INT, THERM_INT_MASK, alert);
 391 
 392         /* send message to SMU to disable internal thermal interrupts */
 393         return smum_send_msg_to_smc(hwmgr, PPSMC_MSG_Thermal_Cntl_Disable);
 394 }
 395 
 396 /**
 397 * Uninitialize the thermal controller.
 398 * Currently just disables alerts.
 399 * @param    hwmgr The address of the hardware manager.
 400 */
 401 int smu7_thermal_stop_thermal_controller(struct pp_hwmgr *hwmgr)
 402 {
 403         int result = smu7_thermal_disable_alert(hwmgr);
 404 
 405         if (!hwmgr->thermal_controller.fanInfo.bNoFan)
 406                 smu7_fan_ctrl_set_default_mode(hwmgr);
 407 
 408         return result;
 409 }
 410 
 411 /**
 412 * Start the fan control on the SMC.
 413 * @param    hwmgr  the address of the powerplay hardware manager.
 414 * @param    pInput the pointer to input data
 415 * @param    pOutput the pointer to output data
 416 * @param    pStorage the pointer to temporary storage
 417 * @param    Result the last failure code
 418 * @return   result from set temperature range routine
 419 */
 420 static int smu7_thermal_start_smc_fan_control(struct pp_hwmgr *hwmgr)
 421 {
 422 /* If the fantable setup has failed we could have disabled
 423  * PHM_PlatformCaps_MicrocodeFanControl even after
 424  * this function was included in the table.
 425  * Make sure that we still think controlling the fan is OK.
 426 */
 427         if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl)) {
 428                 smu7_fan_ctrl_start_smc_fan_control(hwmgr);
 429                 smu7_fan_ctrl_set_static_mode(hwmgr, FDO_PWM_MODE_STATIC);
 430         }
 431 
 432         return 0;
 433 }
 434 
 435 int smu7_start_thermal_controller(struct pp_hwmgr *hwmgr,
 436                                 struct PP_TemperatureRange *range)
 437 {
 438         int ret = 0;
 439 
 440         if (range == NULL)
 441                 return -EINVAL;
 442 
 443         smu7_thermal_initialize(hwmgr);
 444         ret = smu7_thermal_set_temperature_range(hwmgr, range->min, range->max);
 445         if (ret)
 446                 return -EINVAL;
 447         smu7_thermal_enable_alert(hwmgr);
 448         ret = smum_thermal_avfs_enable(hwmgr);
 449         if (ret)
 450                 return -EINVAL;
 451 
 452 /* We should restrict performance levels to low before we halt the SMC.
 453  * On the other hand we are still in boot state when we do this
 454  * so it would be pointless.
 455  * If this assumption changes we have to revisit this table.
 456  */
 457         smum_thermal_setup_fan_table(hwmgr);
 458         smu7_thermal_start_smc_fan_control(hwmgr);
 459         return 0;
 460 }
 461 
 462 
 463 
 464 int smu7_thermal_ctrl_uninitialize_thermal_controller(struct pp_hwmgr *hwmgr)
 465 {
 466         if (!hwmgr->thermal_controller.fanInfo.bNoFan)
 467                 smu7_fan_ctrl_set_default_mode(hwmgr);
 468         return 0;
 469 }
 470