drivers/gpu/drm/amd/powerplay/hwmgr/smu7_thermal.c - linux - Git at Google

 /*
  * Copyright 2016 Advanced Micro Devices, Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  * OTHER DEALINGS IN THE SOFTWARE.
  *
  */

 #include <asm/div64.h>
 #include "smu7_thermal.h"
 #include "smu7_hwmgr.h"
 #include "smu7_common.h"

 int smu7_fan_ctrl_get_fan_speed_info(struct pp_hwmgr *hwmgr,
 		struct phm_fan_speed_info *fan_speed_info)
 {
 	if (hwmgr->thermal_controller.fanInfo.bNoFan)
 		return -ENODEV;

 	fan_speed_info->supports_percent_read = true;
 	fan_speed_info->supports_percent_write = true;
 	fan_speed_info->min_percent = 0;
 	fan_speed_info->max_percent = 100;

 	if (PP_CAP(PHM_PlatformCaps_FanSpeedInTableIsRPM) &&
 	    hwmgr->thermal_controller.fanInfo.ucTachometerPulsesPerRevolution) {
 		fan_speed_info->supports_rpm_read = true;
 		fan_speed_info->supports_rpm_write = true;
 		fan_speed_info->min_rpm = hwmgr->thermal_controller.fanInfo.ulMinRPM;
 		fan_speed_info->max_rpm = hwmgr->thermal_controller.fanInfo.ulMaxRPM;
 	} else {
 		fan_speed_info->min_rpm = 0;
 		fan_speed_info->max_rpm = 0;
 	}

 	return 0;
 }

 int smu7_fan_ctrl_get_fan_speed_percent(struct pp_hwmgr *hwmgr,
 		uint32_t *speed)
 {
 	uint32_t duty100;
 	uint32_t duty;
 	uint64_t tmp64;

 	if (hwmgr->thermal_controller.fanInfo.bNoFan)
 		return -ENODEV;

 	duty100 = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 			CG_FDO_CTRL1, FMAX_DUTY100);
 	duty = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 			CG_THERMAL_STATUS, FDO_PWM_DUTY);

 	if (duty100 == 0)
 		return -EINVAL;


 	tmp64 = (uint64_t)duty * 100;
 	do_div(tmp64, duty100);
 	*speed = (uint32_t)tmp64;

 	if (*speed > 100)
 		*speed = 100;

 	return 0;
 }

 int smu7_fan_ctrl_get_fan_speed_rpm(struct pp_hwmgr *hwmgr, uint32_t *speed)
 {
 	uint32_t tach_period;
 	uint32_t crystal_clock_freq;

 	if (hwmgr->thermal_controller.fanInfo.bNoFan ||
 	    !hwmgr->thermal_controller.fanInfo.ucTachometerPulsesPerRevolution)
 		return -ENODEV;

 	tach_period = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 			CG_TACH_STATUS, TACH_PERIOD);

 	if (tach_period == 0)
 		return -EINVAL;

 	crystal_clock_freq = amdgpu_asic_get_xclk((struct amdgpu_device *)hwmgr->adev);

 	*speed = 60 * crystal_clock_freq * 10000 / tach_period;

 	return 0;
 }

 /**
 * Set Fan Speed Control to static mode, so that the user can decide what speed to use.
 * @param    hwmgr  the address of the powerplay hardware manager.
 *           mode    the fan control mode, 0 default, 1 by percent, 5, by RPM
 * @exception Should always succeed.
 */
 int smu7_fan_ctrl_set_static_mode(struct pp_hwmgr *hwmgr, uint32_t mode)
 {
 	if (hwmgr->fan_ctrl_is_in_default_mode) {
 		hwmgr->fan_ctrl_default_mode =
 				PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 						CG_FDO_CTRL2, FDO_PWM_MODE);
 		hwmgr->tmin =
 				PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 						CG_FDO_CTRL2, TMIN);
 		hwmgr->fan_ctrl_is_in_default_mode = false;
 	}

 	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 			CG_FDO_CTRL2, TMIN, 0);
 	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 			CG_FDO_CTRL2, FDO_PWM_MODE, mode);

 	return 0;
 }

 /**
 * Reset Fan Speed Control to default mode.
 * @param    hwmgr  the address of the powerplay hardware manager.
 * @exception Should always succeed.
 */
 int smu7_fan_ctrl_set_default_mode(struct pp_hwmgr *hwmgr)
 {
 	if (!hwmgr->fan_ctrl_is_in_default_mode) {
 		PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 				CG_FDO_CTRL2, FDO_PWM_MODE, hwmgr->fan_ctrl_default_mode);
 		PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 				CG_FDO_CTRL2, TMIN, hwmgr->tmin);
 		hwmgr->fan_ctrl_is_in_default_mode = true;
 	}

 	return 0;
 }

 int smu7_fan_ctrl_start_smc_fan_control(struct pp_hwmgr *hwmgr)
 {
 	int result;

 	if (PP_CAP(PHM_PlatformCaps_ODFuzzyFanControlSupport)) {
 		cgs_write_register(hwmgr->device, mmSMC_MSG_ARG_0, FAN_CONTROL_FUZZY);
 		result = smum_send_msg_to_smc(hwmgr, PPSMC_StartFanControl);

 		if (PP_CAP(PHM_PlatformCaps_FanSpeedInTableIsRPM))
 			hwmgr->hwmgr_func->set_max_fan_rpm_output(hwmgr,
 					hwmgr->thermal_controller.
 					advanceFanControlParameters.usMaxFanRPM);
 		else
 			hwmgr->hwmgr_func->set_max_fan_pwm_output(hwmgr,
 					hwmgr->thermal_controller.
 					advanceFanControlParameters.usMaxFanPWM);

 	} else {
 		cgs_write_register(hwmgr->device, mmSMC_MSG_ARG_0, FAN_CONTROL_TABLE);
 		result = smum_send_msg_to_smc(hwmgr, PPSMC_StartFanControl);
 	}

 	if (!result && hwmgr->thermal_controller.
 			advanceFanControlParameters.ucTargetTemperature)
 		result = smum_send_msg_to_smc_with_parameter(hwmgr,
 				PPSMC_MSG_SetFanTemperatureTarget,
 				hwmgr->thermal_controller.
 				advanceFanControlParameters.ucTargetTemperature);
 	hwmgr->fan_ctrl_enabled = true;

 	return result;
 }


 int smu7_fan_ctrl_stop_smc_fan_control(struct pp_hwmgr *hwmgr)
 {
 	hwmgr->fan_ctrl_enabled = false;
 	return smum_send_msg_to_smc(hwmgr, PPSMC_StopFanControl);
 }

 /**
 * Set Fan Speed in percent.
 * @param    hwmgr  the address of the powerplay hardware manager.
 * @param    speed is the percentage value (0% - 100%) to be set.
 * @exception Fails is the 100% setting appears to be 0.
 */
 int smu7_fan_ctrl_set_fan_speed_percent(struct pp_hwmgr *hwmgr,
 		uint32_t speed)
 {
 	uint32_t duty100;
 	uint32_t duty;
 	uint64_t tmp64;

 	if (hwmgr->thermal_controller.fanInfo.bNoFan)
 		return 0;

 	if (speed > 100)
 		speed = 100;

 	if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl))
 		smu7_fan_ctrl_stop_smc_fan_control(hwmgr);

 	duty100 = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 			CG_FDO_CTRL1, FMAX_DUTY100);

 	if (duty100 == 0)
 		return -EINVAL;

 	tmp64 = (uint64_t)speed * duty100;
 	do_div(tmp64, 100);
 	duty = (uint32_t)tmp64;

 	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 			CG_FDO_CTRL0, FDO_STATIC_DUTY, duty);

 	return smu7_fan_ctrl_set_static_mode(hwmgr, FDO_PWM_MODE_STATIC);
 }

 /**
 * Reset Fan Speed to default.
 * @param    hwmgr  the address of the powerplay hardware manager.
 * @exception Always succeeds.
 */
 int smu7_fan_ctrl_reset_fan_speed_to_default(struct pp_hwmgr *hwmgr)
 {
 	int result;

 	if (hwmgr->thermal_controller.fanInfo.bNoFan)
 		return 0;

 	if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl)) {
 		result = smu7_fan_ctrl_set_static_mode(hwmgr, FDO_PWM_MODE_STATIC);
 		if (!result)
 			result = smu7_fan_ctrl_start_smc_fan_control(hwmgr);
 	} else
 		result = smu7_fan_ctrl_set_default_mode(hwmgr);

 	return result;
 }

 /**
 * Set Fan Speed in RPM.
 * @param    hwmgr  the address of the powerplay hardware manager.
 * @param    speed is the percentage value (min - max) to be set.
 * @exception Fails is the speed not lie between min and max.
 */
 int smu7_fan_ctrl_set_fan_speed_rpm(struct pp_hwmgr *hwmgr, uint32_t speed)
 {
 	uint32_t tach_period;
 	uint32_t crystal_clock_freq;

 	if (hwmgr->thermal_controller.fanInfo.bNoFan ||
 			(hwmgr->thermal_controller.fanInfo.
 			ucTachometerPulsesPerRevolution == 0) ||
 			speed == 0 ||
 			(speed < hwmgr->thermal_controller.fanInfo.ulMinRPM) ||
 			(speed > hwmgr->thermal_controller.fanInfo.ulMaxRPM))
 		return 0;

 	if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl))
 		smu7_fan_ctrl_stop_smc_fan_control(hwmgr);

 	crystal_clock_freq = amdgpu_asic_get_xclk((struct amdgpu_device *)hwmgr->adev);

 	tach_period = 60 * crystal_clock_freq * 10000 / (8 * speed);

 	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 				CG_TACH_CTRL, TARGET_PERIOD, tach_period);

 	return smu7_fan_ctrl_set_static_mode(hwmgr, FDO_PWM_MODE_STATIC_RPM);
 }

 /**
 * Reads the remote temperature from the SIslands thermal controller.
 *
 * @param    hwmgr The address of the hardware manager.
 */
 int smu7_thermal_get_temperature(struct pp_hwmgr *hwmgr)
 {
 	int temp;

 	temp = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 			CG_MULT_THERMAL_STATUS, CTF_TEMP);

 	/* Bit 9 means the reading is lower than the lowest usable value. */
 	if (temp & 0x200)
 		temp = SMU7_THERMAL_MAXIMUM_TEMP_READING;
 	else
 		temp = temp & 0x1ff;

 	temp *= PP_TEMPERATURE_UNITS_PER_CENTIGRADES;

 	return temp;
 }

 /**
 * Set the requested temperature range for high and low alert signals
 *
 * @param    hwmgr The address of the hardware manager.
 * @param    range Temperature range to be programmed for high and low alert signals
 * @exception PP_Result_BadInput if the input data is not valid.
 */
 static int smu7_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
 		int low_temp, int high_temp)
 {
 	int low = SMU7_THERMAL_MINIMUM_ALERT_TEMP *
 			PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
 	int high = SMU7_THERMAL_MAXIMUM_ALERT_TEMP *
 			PP_TEMPERATURE_UNITS_PER_CENTIGRADES;

 	if (low < low_temp)
 		low = low_temp;
 	if (high > high_temp)
 		high = high_temp;

 	if (low > high)
 		return -EINVAL;

 	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 			CG_THERMAL_INT, DIG_THERM_INTH,
 			(high / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));
 	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 			CG_THERMAL_INT, DIG_THERM_INTL,
 			(low / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));
 	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 			CG_THERMAL_CTRL, DIG_THERM_DPM,
 			(high / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));

 	return 0;
 }

 /**
 * Programs thermal controller one-time setting registers
 *
 * @param    hwmgr The address of the hardware manager.
 */
 static int smu7_thermal_initialize(struct pp_hwmgr *hwmgr)
 {
 	if (hwmgr->thermal_controller.fanInfo.ucTachometerPulsesPerRevolution)
 		PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 				CG_TACH_CTRL, EDGE_PER_REV,
 				hwmgr->thermal_controller.fanInfo.
 				ucTachometerPulsesPerRevolution - 1);

 	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 			CG_FDO_CTRL2, TACH_PWM_RESP_RATE, 0x28);

 	return 0;
 }

 /**
 * Enable thermal alerts on the RV770 thermal controller.
 *
 * @param    hwmgr The address of the hardware manager.
 */
 static void smu7_thermal_enable_alert(struct pp_hwmgr *hwmgr)
 {
 	uint32_t alert;

 	alert = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 			CG_THERMAL_INT, THERM_INT_MASK);
 	alert &= ~(SMU7_THERMAL_HIGH_ALERT_MASK | SMU7_THERMAL_LOW_ALERT_MASK);
 	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 			CG_THERMAL_INT, THERM_INT_MASK, alert);

 	/* send message to SMU to enable internal thermal interrupts */
 	smum_send_msg_to_smc(hwmgr, PPSMC_MSG_Thermal_Cntl_Enable);
 }

 /**
 * Disable thermal alerts on the RV770 thermal controller.
 * @param    hwmgr The address of the hardware manager.
 */
 int smu7_thermal_disable_alert(struct pp_hwmgr *hwmgr)
 {
 	uint32_t alert;

 	alert = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 			CG_THERMAL_INT, THERM_INT_MASK);
 	alert |= (SMU7_THERMAL_HIGH_ALERT_MASK | SMU7_THERMAL_LOW_ALERT_MASK);
 	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
 			CG_THERMAL_INT, THERM_INT_MASK, alert);

 	/* send message to SMU to disable internal thermal interrupts */
 	return smum_send_msg_to_smc(hwmgr, PPSMC_MSG_Thermal_Cntl_Disable);
 }

 /**
 * Uninitialize the thermal controller.
 * Currently just disables alerts.
 * @param    hwmgr The address of the hardware manager.
 */
 int smu7_thermal_stop_thermal_controller(struct pp_hwmgr *hwmgr)
 {
 	int result = smu7_thermal_disable_alert(hwmgr);

 	if (!hwmgr->thermal_controller.fanInfo.bNoFan)
 		smu7_fan_ctrl_set_default_mode(hwmgr);

 	return result;
 }

 /**
 * Start the fan control on the SMC.
 * @param    hwmgr  the address of the powerplay hardware manager.
 * @param    pInput the pointer to input data
 * @param    pOutput the pointer to output data
 * @param    pStorage the pointer to temporary storage
 * @param    Result the last failure code
 * @return   result from set temperature range routine
 */
 static int smu7_thermal_start_smc_fan_control(struct pp_hwmgr *hwmgr)
 {
 /* If the fantable setup has failed we could have disabled
  * PHM_PlatformCaps_MicrocodeFanControl even after
  * this function was included in the table.
  * Make sure that we still think controlling the fan is OK.
 */
 	if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl)) {
 		smu7_fan_ctrl_start_smc_fan_control(hwmgr);
 		smu7_fan_ctrl_set_static_mode(hwmgr, FDO_PWM_MODE_STATIC);
 	}

 	return 0;
 }

 int smu7_start_thermal_controller(struct pp_hwmgr *hwmgr,
 				struct PP_TemperatureRange *range)
 {
 	int ret = 0;

 	if (range == NULL)
 		return -EINVAL;

 	smu7_thermal_initialize(hwmgr);
 	ret = smu7_thermal_set_temperature_range(hwmgr, range->min, range->max);
 	if (ret)
 		return -EINVAL;
 	smu7_thermal_enable_alert(hwmgr);
 	ret = smum_thermal_avfs_enable(hwmgr);
 	if (ret)
 		return -EINVAL;

 /* We should restrict performance levels to low before we halt the SMC.
  * On the other hand we are still in boot state when we do this
  * so it would be pointless.
  * If this assumption changes we have to revisit this table.
  */
 	smum_thermal_setup_fan_table(hwmgr);
 	smu7_thermal_start_smc_fan_control(hwmgr);
 	return 0;
 }


 int smu7_thermal_ctrl_uninitialize_thermal_controller(struct pp_hwmgr *hwmgr)
 {
 	if (!hwmgr->thermal_controller.fanInfo.bNoFan)
 		smu7_fan_ctrl_set_default_mode(hwmgr);
 	return 0;
 }
	/*
	* Copyright 2016 Advanced Micro Devices, Inc.
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	* and/or sell copies of the Software, and to permit persons to whom the
	* Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	* OTHER DEALINGS IN THE SOFTWARE.
	*
	*/

	#include <asm/div64.h>
	#include "smu7_thermal.h"
	#include "smu7_hwmgr.h"
	#include "smu7_common.h"

	int smu7_fan_ctrl_get_fan_speed_info(struct pp_hwmgr *hwmgr,
	struct phm_fan_speed_info *fan_speed_info)
	{
	if (hwmgr->thermal_controller.fanInfo.bNoFan)
	return -ENODEV;

	fan_speed_info->supports_percent_read = true;
	fan_speed_info->supports_percent_write = true;
	fan_speed_info->min_percent = 0;
	fan_speed_info->max_percent = 100;

	if (PP_CAP(PHM_PlatformCaps_FanSpeedInTableIsRPM) &&
	hwmgr->thermal_controller.fanInfo.ucTachometerPulsesPerRevolution) {
	fan_speed_info->supports_rpm_read = true;
	fan_speed_info->supports_rpm_write = true;
	fan_speed_info->min_rpm = hwmgr->thermal_controller.fanInfo.ulMinRPM;
	fan_speed_info->max_rpm = hwmgr->thermal_controller.fanInfo.ulMaxRPM;
	} else {
	fan_speed_info->min_rpm = 0;
	fan_speed_info->max_rpm = 0;
	}

	return 0;
	}

	int smu7_fan_ctrl_get_fan_speed_percent(struct pp_hwmgr *hwmgr,
	uint32_t *speed)
	{
	uint32_t duty100;
	uint32_t duty;
	uint64_t tmp64;

	if (hwmgr->thermal_controller.fanInfo.bNoFan)
	return -ENODEV;

	duty100 = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_FDO_CTRL1, FMAX_DUTY100);
	duty = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_THERMAL_STATUS, FDO_PWM_DUTY);

	if (duty100 == 0)
	return -EINVAL;


	tmp64 = (uint64_t)duty * 100;
	do_div(tmp64, duty100);
	*speed = (uint32_t)tmp64;

	if (*speed > 100)
	*speed = 100;

	return 0;
	}

	int smu7_fan_ctrl_get_fan_speed_rpm(struct pp_hwmgr hwmgr, uint32_t speed)
	{
	uint32_t tach_period;
	uint32_t crystal_clock_freq;

	if (hwmgr->thermal_controller.fanInfo.bNoFan \|\|
	!hwmgr->thermal_controller.fanInfo.ucTachometerPulsesPerRevolution)
	return -ENODEV;

	tach_period = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_TACH_STATUS, TACH_PERIOD);

	if (tach_period == 0)
	return -EINVAL;

	crystal_clock_freq = amdgpu_asic_get_xclk((struct amdgpu_device *)hwmgr->adev);

	speed = 60 crystal_clock_freq * 10000 / tach_period;

	return 0;
	}

	/**
	* Set Fan Speed Control to static mode, so that the user can decide what speed to use.
	* @param hwmgr the address of the powerplay hardware manager.
	* mode the fan control mode, 0 default, 1 by percent, 5, by RPM
	* @exception Should always succeed.
	*/
	int smu7_fan_ctrl_set_static_mode(struct pp_hwmgr *hwmgr, uint32_t mode)
	{
	if (hwmgr->fan_ctrl_is_in_default_mode) {
	hwmgr->fan_ctrl_default_mode =
	PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_FDO_CTRL2, FDO_PWM_MODE);
	hwmgr->tmin =
	PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_FDO_CTRL2, TMIN);
	hwmgr->fan_ctrl_is_in_default_mode = false;
	}

	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_FDO_CTRL2, TMIN, 0);
	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_FDO_CTRL2, FDO_PWM_MODE, mode);

	return 0;
	}

	/**
	* Reset Fan Speed Control to default mode.
	* @param hwmgr the address of the powerplay hardware manager.
	* @exception Should always succeed.
	*/
	int smu7_fan_ctrl_set_default_mode(struct pp_hwmgr *hwmgr)
	{
	if (!hwmgr->fan_ctrl_is_in_default_mode) {
	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_FDO_CTRL2, FDO_PWM_MODE, hwmgr->fan_ctrl_default_mode);
	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_FDO_CTRL2, TMIN, hwmgr->tmin);
	hwmgr->fan_ctrl_is_in_default_mode = true;
	}

	return 0;
	}

	int smu7_fan_ctrl_start_smc_fan_control(struct pp_hwmgr *hwmgr)
	{
	int result;

	if (PP_CAP(PHM_PlatformCaps_ODFuzzyFanControlSupport)) {
	cgs_write_register(hwmgr->device, mmSMC_MSG_ARG_0, FAN_CONTROL_FUZZY);
	result = smum_send_msg_to_smc(hwmgr, PPSMC_StartFanControl);

	if (PP_CAP(PHM_PlatformCaps_FanSpeedInTableIsRPM))
	hwmgr->hwmgr_func->set_max_fan_rpm_output(hwmgr,
	hwmgr->thermal_controller.
	advanceFanControlParameters.usMaxFanRPM);
	else
	hwmgr->hwmgr_func->set_max_fan_pwm_output(hwmgr,
	hwmgr->thermal_controller.
	advanceFanControlParameters.usMaxFanPWM);

	} else {
	cgs_write_register(hwmgr->device, mmSMC_MSG_ARG_0, FAN_CONTROL_TABLE);
	result = smum_send_msg_to_smc(hwmgr, PPSMC_StartFanControl);
	}

	if (!result && hwmgr->thermal_controller.
	advanceFanControlParameters.ucTargetTemperature)
	result = smum_send_msg_to_smc_with_parameter(hwmgr,
	PPSMC_MSG_SetFanTemperatureTarget,
	hwmgr->thermal_controller.
	advanceFanControlParameters.ucTargetTemperature);
	hwmgr->fan_ctrl_enabled = true;

	return result;
	}


	int smu7_fan_ctrl_stop_smc_fan_control(struct pp_hwmgr *hwmgr)
	{
	hwmgr->fan_ctrl_enabled = false;
	return smum_send_msg_to_smc(hwmgr, PPSMC_StopFanControl);
	}

	/**
	* Set Fan Speed in percent.
	* @param hwmgr the address of the powerplay hardware manager.
	* @param speed is the percentage value (0% - 100%) to be set.
	* @exception Fails is the 100% setting appears to be 0.
	*/
	int smu7_fan_ctrl_set_fan_speed_percent(struct pp_hwmgr *hwmgr,
	uint32_t speed)
	{
	uint32_t duty100;
	uint32_t duty;
	uint64_t tmp64;

	if (hwmgr->thermal_controller.fanInfo.bNoFan)
	return 0;

	if (speed > 100)
	speed = 100;

	if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl))
	smu7_fan_ctrl_stop_smc_fan_control(hwmgr);

	duty100 = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_FDO_CTRL1, FMAX_DUTY100);

	if (duty100 == 0)
	return -EINVAL;

	tmp64 = (uint64_t)speed * duty100;
	do_div(tmp64, 100);
	duty = (uint32_t)tmp64;

	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_FDO_CTRL0, FDO_STATIC_DUTY, duty);

	return smu7_fan_ctrl_set_static_mode(hwmgr, FDO_PWM_MODE_STATIC);
	}

	/**
	* Reset Fan Speed to default.
	* @param hwmgr the address of the powerplay hardware manager.
	* @exception Always succeeds.
	*/
	int smu7_fan_ctrl_reset_fan_speed_to_default(struct pp_hwmgr *hwmgr)
	{
	int result;

	if (hwmgr->thermal_controller.fanInfo.bNoFan)
	return 0;

	if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl)) {
	result = smu7_fan_ctrl_set_static_mode(hwmgr, FDO_PWM_MODE_STATIC);
	if (!result)
	result = smu7_fan_ctrl_start_smc_fan_control(hwmgr);
	} else
	result = smu7_fan_ctrl_set_default_mode(hwmgr);

	return result;
	}

	/**
	* Set Fan Speed in RPM.
	* @param hwmgr the address of the powerplay hardware manager.
	* @param speed is the percentage value (min - max) to be set.
	* @exception Fails is the speed not lie between min and max.
	*/
	int smu7_fan_ctrl_set_fan_speed_rpm(struct pp_hwmgr *hwmgr, uint32_t speed)
	{
	uint32_t tach_period;
	uint32_t crystal_clock_freq;

	if (hwmgr->thermal_controller.fanInfo.bNoFan \|\|
	(hwmgr->thermal_controller.fanInfo.
	ucTachometerPulsesPerRevolution == 0) \|\|
	speed == 0 \|\|
	(speed < hwmgr->thermal_controller.fanInfo.ulMinRPM) \|\|
	(speed > hwmgr->thermal_controller.fanInfo.ulMaxRPM))
	return 0;

	if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl))
	smu7_fan_ctrl_stop_smc_fan_control(hwmgr);

	crystal_clock_freq = amdgpu_asic_get_xclk((struct amdgpu_device *)hwmgr->adev);

	tach_period = 60 * crystal_clock_freq * 10000 / (8 * speed);

	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_TACH_CTRL, TARGET_PERIOD, tach_period);

	return smu7_fan_ctrl_set_static_mode(hwmgr, FDO_PWM_MODE_STATIC_RPM);
	}

	/**
	* Reads the remote temperature from the SIslands thermal controller.
	*
	* @param hwmgr The address of the hardware manager.
	*/
	int smu7_thermal_get_temperature(struct pp_hwmgr *hwmgr)
	{
	int temp;

	temp = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_MULT_THERMAL_STATUS, CTF_TEMP);

	/* Bit 9 means the reading is lower than the lowest usable value. */
	if (temp & 0x200)
	temp = SMU7_THERMAL_MAXIMUM_TEMP_READING;
	else
	temp = temp & 0x1ff;

	temp *= PP_TEMPERATURE_UNITS_PER_CENTIGRADES;

	return temp;
	}

	/**
	* Set the requested temperature range for high and low alert signals
	*
	* @param hwmgr The address of the hardware manager.
	* @param range Temperature range to be programmed for high and low alert signals
	* @exception PP_Result_BadInput if the input data is not valid.
	*/
	static int smu7_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
	int low_temp, int high_temp)
	{
	int low = SMU7_THERMAL_MINIMUM_ALERT_TEMP *
	PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
	int high = SMU7_THERMAL_MAXIMUM_ALERT_TEMP *
	PP_TEMPERATURE_UNITS_PER_CENTIGRADES;

	if (low < low_temp)
	low = low_temp;
	if (high > high_temp)
	high = high_temp;

	if (low > high)
	return -EINVAL;

	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_THERMAL_INT, DIG_THERM_INTH,
	(high / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));
	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_THERMAL_INT, DIG_THERM_INTL,
	(low / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));
	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_THERMAL_CTRL, DIG_THERM_DPM,
	(high / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));

	return 0;
	}

	/**
	* Programs thermal controller one-time setting registers
	*
	* @param hwmgr The address of the hardware manager.
	*/
	static int smu7_thermal_initialize(struct pp_hwmgr *hwmgr)
	{
	if (hwmgr->thermal_controller.fanInfo.ucTachometerPulsesPerRevolution)
	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_TACH_CTRL, EDGE_PER_REV,
	hwmgr->thermal_controller.fanInfo.
	ucTachometerPulsesPerRevolution - 1);

	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_FDO_CTRL2, TACH_PWM_RESP_RATE, 0x28);

	return 0;
	}

	/**
	* Enable thermal alerts on the RV770 thermal controller.
	*
	* @param hwmgr The address of the hardware manager.
	*/
	static void smu7_thermal_enable_alert(struct pp_hwmgr *hwmgr)
	{
	uint32_t alert;

	alert = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_THERMAL_INT, THERM_INT_MASK);
	alert &= ~(SMU7_THERMAL_HIGH_ALERT_MASK \| SMU7_THERMAL_LOW_ALERT_MASK);
	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_THERMAL_INT, THERM_INT_MASK, alert);

	/* send message to SMU to enable internal thermal interrupts */
	smum_send_msg_to_smc(hwmgr, PPSMC_MSG_Thermal_Cntl_Enable);
	}

	/**
	* Disable thermal alerts on the RV770 thermal controller.
	* @param hwmgr The address of the hardware manager.
	*/
	int smu7_thermal_disable_alert(struct pp_hwmgr *hwmgr)
	{
	uint32_t alert;

	alert = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_THERMAL_INT, THERM_INT_MASK);
	alert \|= (SMU7_THERMAL_HIGH_ALERT_MASK \| SMU7_THERMAL_LOW_ALERT_MASK);
	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
	CG_THERMAL_INT, THERM_INT_MASK, alert);

	/* send message to SMU to disable internal thermal interrupts */
	return smum_send_msg_to_smc(hwmgr, PPSMC_MSG_Thermal_Cntl_Disable);
	}

	/**
	* Uninitialize the thermal controller.
	* Currently just disables alerts.
	* @param hwmgr The address of the hardware manager.
	*/
	int smu7_thermal_stop_thermal_controller(struct pp_hwmgr *hwmgr)
	{
	int result = smu7_thermal_disable_alert(hwmgr);

	if (!hwmgr->thermal_controller.fanInfo.bNoFan)
	smu7_fan_ctrl_set_default_mode(hwmgr);

	return result;
	}

	/**
	* Start the fan control on the SMC.
	* @param hwmgr the address of the powerplay hardware manager.
	* @param pInput the pointer to input data
	* @param pOutput the pointer to output data
	* @param pStorage the pointer to temporary storage
	* @param Result the last failure code
	* @return result from set temperature range routine
	*/
	static int smu7_thermal_start_smc_fan_control(struct pp_hwmgr *hwmgr)
	{
	/* If the fantable setup has failed we could have disabled
	* PHM_PlatformCaps_MicrocodeFanControl even after
	* this function was included in the table.
	* Make sure that we still think controlling the fan is OK.
	*/
	if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl)) {
	smu7_fan_ctrl_start_smc_fan_control(hwmgr);
	smu7_fan_ctrl_set_static_mode(hwmgr, FDO_PWM_MODE_STATIC);
	}

	return 0;
	}

	int smu7_start_thermal_controller(struct pp_hwmgr *hwmgr,
	struct PP_TemperatureRange *range)
	{
	int ret = 0;

	if (range == NULL)
	return -EINVAL;

	smu7_thermal_initialize(hwmgr);
	ret = smu7_thermal_set_temperature_range(hwmgr, range->min, range->max);
	if (ret)
	return -EINVAL;
	smu7_thermal_enable_alert(hwmgr);
	ret = smum_thermal_avfs_enable(hwmgr);
	if (ret)
	return -EINVAL;

	/* We should restrict performance levels to low before we halt the SMC.
	* On the other hand we are still in boot state when we do this
	* so it would be pointless.
	* If this assumption changes we have to revisit this table.
	*/
	smum_thermal_setup_fan_table(hwmgr);
	smu7_thermal_start_smc_fan_control(hwmgr);
	return 0;
	}



	int smu7_thermal_ctrl_uninitialize_thermal_controller(struct pp_hwmgr *hwmgr)
	{
	if (!hwmgr->thermal_controller.fanInfo.bNoFan)
	smu7_fan_ctrl_set_default_mode(hwmgr);
	return 0;
	}