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/*
* Copyright (C) 2020-2025 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#include "level_zero/tools/source/sysman/fan/windows/os_fan_imp.h"
#include "level_zero/tools/source/sysman/windows/kmd_sys_manager.h"
namespace L0 {
struct FanPoint {
union {
struct {
int32_t temperatureDegreesCelsius : 16;
int32_t fanSpeedPercent : 16;
};
int32_t data;
};
};
union FanCapability {
struct
{
int32_t allSupported : 1; /// Allows a single usermode fan table to be applied to all fan devices.
int32_t singleSupported : 1; /// Allows different usermode fan tables to be configured.
int32_t reserved : 30; /// Reserved Bits
};
int32_t data;
};
ze_result_t WddmFanImp::getProperties(zes_fan_properties_t *pProperties) {
pProperties->onSubdevice = false;
pProperties->subdeviceId = 0;
std::vector<KmdSysman::RequestProperty> vRequests = {};
std::vector<KmdSysman::ResponseProperty> vResponses = {};
KmdSysman::RequestProperty request = {};
// Set fan index only if multiple fans are supported
setFanIndexForMultipleFans(vRequests);
request.commandId = KmdSysman::Command::Set;
request.componentId = KmdSysman::Component::FanComponent;
request.requestId = KmdSysman::Requests::Fans::CurrentNumOfControlPoints;
request.dataSize = sizeof(uint32_t);
uint32_t fanPoints = 2;
memcpy_s(request.dataBuffer, sizeof(uint32_t), &fanPoints, sizeof(uint32_t));
vRequests.push_back(request);
request.dataSize = 0;
memset(request.dataBuffer, request.dataSize, sizeof(request.dataBuffer));
request.commandId = KmdSysman::Command::Get;
request.requestId = KmdSysman::Requests::Fans::MaxFanControlPointsSupported;
vRequests.push_back(request);
// Add request to get max fan speed (RPM)
request.requestId = KmdSysman::Requests::Fans::MaxFanSpeedSupported;
vRequests.push_back(request);
ze_result_t status = pKmdSysManager->requestMultiple(vRequests, vResponses);
if (status != ZE_RESULT_SUCCESS) {
return status;
}
if (vResponses.size() != vRequests.size()) {
return ZE_RESULT_ERROR_UNKNOWN;
}
// Calculate response offset based on whether fan index requests were added
uint32_t responseOffset = getResponseOffset();
pProperties->canControl = (vResponses[responseOffset].returnCode == KmdSysman::Success);
if (vResponses[responseOffset + 1].returnCode == KmdSysman::Success) {
memcpy_s(&fanPoints, sizeof(uint32_t), vResponses[responseOffset + 1].dataBuffer, sizeof(uint32_t));
pProperties->maxPoints = maxPoints = static_cast<int32_t>(fanPoints);
}
// Get max fan speed (RPM)
pProperties->maxRPM = -1; // Default to unsupported
if (vResponses[responseOffset + 2].returnCode == KmdSysman::Success) {
uint32_t maxRPS = 0;
memcpy_s(&maxRPS, sizeof(uint32_t), vResponses[responseOffset + 2].dataBuffer, sizeof(uint32_t));
pProperties->maxRPM = static_cast<int32_t>(maxRPS) * 60;
}
pProperties->supportedModes = zes_fan_speed_mode_t::ZES_FAN_SPEED_MODE_TABLE;
pProperties->supportedUnits = zes_fan_speed_units_t::ZES_FAN_SPEED_UNITS_PERCENT;
return ZE_RESULT_SUCCESS;
}
ze_result_t WddmFanImp::getConfig(zes_fan_config_t *pConfig) {
std::vector<KmdSysman::RequestProperty> vRequests = {};
std::vector<KmdSysman::ResponseProperty> vResponses = {};
setFanIndexForMultipleFans(vRequests);
KmdSysman::RequestProperty request = {};
request.commandId = KmdSysman::Command::Get;
request.componentId = KmdSysman::Component::FanComponent;
request.requestId = KmdSysman::Requests::Fans::CurrentNumOfControlPoints;
vRequests.push_back(request);
ze_result_t status = pKmdSysManager->requestMultiple(vRequests, vResponses);
if (status != ZE_RESULT_SUCCESS) {
return status;
}
if (vResponses.size() != vRequests.size()) {
return ZE_RESULT_ERROR_UNKNOWN;
}
uint32_t responseOffset = getResponseOffset();
uint32_t value = 0;
if (vResponses[responseOffset].returnCode == KmdSysman::Success) {
memcpy_s(&value, sizeof(uint32_t), vResponses[responseOffset].dataBuffer, sizeof(uint32_t));
}
if (value == 0) {
return handleDefaultMode(pConfig);
} else {
return handleTableMode(pConfig, value);
}
}
ze_result_t WddmFanImp::handleDefaultMode(zes_fan_config_t *pConfig) {
// Default mode - need to get max fan points
pConfig->mode = ZES_FAN_SPEED_MODE_DEFAULT;
pConfig->speedTable.numPoints = 0;
std::vector<KmdSysman::RequestProperty> vRequests = {};
std::vector<KmdSysman::ResponseProperty> vResponses = {};
setFanIndexForMultipleFans(vRequests);
KmdSysman::RequestProperty request = {};
request.commandId = KmdSysman::Command::Get;
request.componentId = KmdSysman::Component::FanComponent;
request.requestId = KmdSysman::Requests::Fans::MaxFanControlPointsSupported;
vRequests.push_back(request);
uint32_t responseOffset = getResponseOffset();
ze_result_t status = pKmdSysManager->requestMultiple(vRequests, vResponses);
if ((status == ZE_RESULT_SUCCESS) && (vResponses.size() == vRequests.size()) && (vResponses[responseOffset].returnCode == KmdSysman::Success)) {
uint32_t maxFanPoints = 0;
memcpy_s(&maxFanPoints, sizeof(uint32_t), vResponses[responseOffset].dataBuffer, sizeof(uint32_t));
pConfig->speedTable.numPoints = static_cast<int32_t>(maxFanPoints);
// Try reading Default Fan table if the platform supports
if (maxFanPoints != 0) {
for (int32_t i = 0; i < pConfig->speedTable.numPoints; i++) {
vRequests.clear();
vResponses.clear();
setFanIndexForMultipleFans(vRequests);
request = {};
request.commandId = KmdSysman::Command::Get;
request.componentId = KmdSysman::Component::FanComponent;
request.requestId = KmdSysman::Requests::Fans::CurrentFanPoint;
vRequests.push_back(request);
status = pKmdSysManager->requestMultiple(vRequests, vResponses);
if ((status == ZE_RESULT_SUCCESS) && (vResponses.size() == vRequests.size()) && (vResponses[responseOffset].returnCode == KmdSysman::Success)) {
FanPoint point = {};
memcpy_s(&point.data, sizeof(uint32_t), vResponses[responseOffset].dataBuffer, sizeof(uint32_t));
pConfig->speedTable.table[i].speed.speed = point.fanSpeedPercent;
pConfig->speedTable.table[i].speed.units = ZES_FAN_SPEED_UNITS_PERCENT;
pConfig->speedTable.table[i].temperature = point.temperatureDegreesCelsius;
} else {
pConfig->speedTable.numPoints = i;
break;
}
}
}
} // else, return Success. We still return valid FanConfig.mode
return ZE_RESULT_SUCCESS;
}
ze_result_t WddmFanImp::handleTableMode(zes_fan_config_t *pConfig, uint32_t numPoints) {
// Table mode - need to read existing fan points
pConfig->mode = ZES_FAN_SPEED_MODE_TABLE;
pConfig->speedTable.numPoints = numPoints;
std::vector<KmdSysman::RequestProperty> vRequests = {};
std::vector<KmdSysman::ResponseProperty> vResponses = {};
uint32_t responseOffset = getResponseOffset();
for (int32_t i = 0; i < pConfig->speedTable.numPoints; i++) {
vRequests.clear();
vResponses.clear();
setFanIndexForMultipleFans(vRequests);
KmdSysman::RequestProperty request = {};
request.commandId = KmdSysman::Command::Get;
request.componentId = KmdSysman::Component::FanComponent;
request.requestId = KmdSysman::Requests::Fans::CurrentFanPoint;
vRequests.push_back(request);
ze_result_t status = pKmdSysManager->requestMultiple(vRequests, vResponses);
if ((status == ZE_RESULT_SUCCESS) && (vResponses.size() == vRequests.size()) && (vResponses[responseOffset].returnCode == KmdSysman::Success)) {
FanPoint point = {};
memcpy_s(&point.data, sizeof(uint32_t), vResponses[responseOffset].dataBuffer, sizeof(uint32_t));
pConfig->speedTable.table[i].speed.speed = point.fanSpeedPercent;
pConfig->speedTable.table[i].speed.units = ZES_FAN_SPEED_UNITS_PERCENT;
pConfig->speedTable.table[i].temperature = point.temperatureDegreesCelsius;
}
}
return ZE_RESULT_SUCCESS;
}
ze_result_t WddmFanImp::setDefaultMode() {
std::vector<KmdSysman::RequestProperty> vRequests = {};
std::vector<KmdSysman::ResponseProperty> vResponses = {};
// Set fan index only if multiple fans are supported
setFanIndexForMultipleFans(vRequests);
KmdSysman::RequestProperty request = {};
// Passing current number of control points as zero will reset pcode to default fan curve
uint32_t value = 0; // 0 to reset to default
request.commandId = KmdSysman::Command::Set;
request.componentId = KmdSysman::Component::FanComponent;
request.requestId = KmdSysman::Requests::Fans::CurrentNumOfControlPoints;
request.dataSize = sizeof(uint32_t);
memcpy_s(request.dataBuffer, sizeof(uint32_t), &value, sizeof(uint32_t));
vRequests.push_back(request);
return pKmdSysManager->requestMultiple(vRequests, vResponses);
}
ze_result_t WddmFanImp::setFixedSpeedMode(const zes_fan_speed_t *pSpeed) {
return ZE_RESULT_ERROR_UNSUPPORTED_FEATURE;
}
ze_result_t WddmFanImp::setSpeedTableMode(const zes_fan_speed_table_t *pSpeedTable) {
std::vector<KmdSysman::RequestProperty> vRequests = {};
std::vector<KmdSysman::ResponseProperty> vResponses = {};
// Set fan index first only if multiple fans are supported
setFanIndexForMultipleFans(vRequests);
KmdSysman::RequestProperty request = {};
request.commandId = KmdSysman::Command::Get;
request.componentId = KmdSysman::Component::FanComponent;
request.requestId = KmdSysman::Requests::Fans::MaxFanControlPointsSupported;
vRequests.push_back(request);
uint32_t fanPoints = 2;
uint32_t responseOffset = getResponseOffset();
ze_result_t status = pKmdSysManager->requestMultiple(vRequests, vResponses);
if (status != ZE_RESULT_SUCCESS) {
return status;
}
if ((vResponses.size() == vRequests.size()) && (vResponses[responseOffset].returnCode == KmdSysman::Success)) {
memcpy_s(&fanPoints, sizeof(uint32_t), vResponses[responseOffset].dataBuffer, sizeof(uint32_t));
maxPoints = static_cast<int32_t>(fanPoints);
} else {
return ZE_RESULT_ERROR_UNKNOWN;
}
if (pSpeedTable->numPoints == 0 || pSpeedTable->numPoints > maxPoints) {
return ZE_RESULT_ERROR_INVALID_ARGUMENT;
}
for (int32_t i = 0; i < pSpeedTable->numPoints; i++) {
if (pSpeedTable->table[i].speed.units == zes_fan_speed_units_t::ZES_FAN_SPEED_UNITS_RPM) {
return ZE_RESULT_ERROR_INVALID_ARGUMENT;
}
}
// Clear the vectors and prepare for the actual speed table setting
vRequests.clear();
vResponses.clear();
// Set fan index first only if multiple fans are supported
setFanIndexForMultipleFans(vRequests);
uint32_t value = pSpeedTable->numPoints;
request = {};
request.commandId = KmdSysman::Command::Set;
request.componentId = KmdSysman::Component::FanComponent;
request.requestId = KmdSysman::Requests::Fans::CurrentNumOfControlPoints;
request.dataSize = sizeof(uint32_t);
memcpy_s(request.dataBuffer, sizeof(uint32_t), &value, sizeof(uint32_t));
vRequests.push_back(request);
request.requestId = KmdSysman::Requests::Fans::CurrentFanPoint;
for (int32_t i = 0; i < pSpeedTable->numPoints; i++) {
FanPoint point = {};
point.fanSpeedPercent = pSpeedTable->table[i].speed.speed;
point.temperatureDegreesCelsius = pSpeedTable->table[i].temperature;
value = point.data;
memcpy_s(request.dataBuffer, sizeof(uint32_t), &value, sizeof(uint32_t));
vRequests.push_back(request);
}
return pKmdSysManager->requestMultiple(vRequests, vResponses);
}
ze_result_t WddmFanImp::getState(zes_fan_speed_units_t units, int32_t *pSpeed) {
if (units == ZES_FAN_SPEED_UNITS_PERCENT) {
return ZE_RESULT_ERROR_UNSUPPORTED_FEATURE;
}
std::vector<KmdSysman::RequestProperty> vRequests = {};
std::vector<KmdSysman::ResponseProperty> vResponses = {};
setFanIndexForMultipleFans(vRequests);
KmdSysman::RequestProperty request = {};
request.commandId = KmdSysman::Command::Get;
request.componentId = KmdSysman::Component::FanComponent;
request.requestId = KmdSysman::Requests::Fans::CurrentFanSpeed;
vRequests.push_back(request);
uint32_t responseOffset = getResponseOffset();
ze_result_t status = pKmdSysManager->requestMultiple(vRequests, vResponses);
if (status != ZE_RESULT_SUCCESS) {
return status;
}
if ((vResponses.size() != vRequests.size()) || (vResponses[responseOffset].returnCode != KmdSysman::Success)) {
return ZE_RESULT_ERROR_UNKNOWN;
}
uint32_t value = 0;
memcpy_s(&value, sizeof(uint32_t), vResponses[responseOffset].dataBuffer, sizeof(uint32_t));
*pSpeed = static_cast<int32_t>(value);
return ZE_RESULT_SUCCESS;
}
WddmFanImp::WddmFanImp(OsSysman *pOsSysman, uint32_t fanIndex, bool multipleFansSupported)
: fanIndex(fanIndex), multipleFansSupported(multipleFansSupported) {
WddmSysmanImp *pWddmSysmanImp = static_cast<WddmSysmanImp *>(pOsSysman);
pKmdSysManager = &pWddmSysmanImp->getKmdSysManager();
}
std::unique_ptr<OsFan> OsFan::create(OsSysman *pOsSysman, uint32_t fanIndex, bool multipleFansSupported) {
std::unique_ptr<WddmFanImp> pWddmFanImp = std::make_unique<WddmFanImp>(pOsSysman, fanIndex, multipleFansSupported);
return pWddmFanImp;
}
uint32_t OsFan::getSupportedFanCount(OsSysman *pOsSysman) {
WddmSysmanImp *pWddmSysmanImp = static_cast<WddmSysmanImp *>(pOsSysman);
KmdSysManager *pKmdSysManager = &pWddmSysmanImp->getKmdSysManager();
KmdSysman::RequestProperty request;
KmdSysman::ResponseProperty response;
// Get the number of fan domains
request.commandId = KmdSysman::Command::Get;
request.componentId = KmdSysman::Component::FanComponent;
request.requestId = KmdSysman::Requests::Fans::NumFanDomains;
ze_result_t status = pKmdSysManager->requestSingle(request, response);
if (status != ZE_RESULT_SUCCESS) {
return 0;
}
uint32_t fanCount = 0;
memcpy_s(&fanCount, sizeof(uint32_t), response.dataBuffer, sizeof(uint32_t));
// If fanCount > 1, check if SingleSupported mode is available
if (fanCount > 1) {
request.commandId = KmdSysman::Command::Get;
request.componentId = KmdSysman::Component::FanComponent;
request.requestId = KmdSysman::Requests::Fans::SupportedFanModeCapabilities;
status = pKmdSysManager->requestSingle(request, response);
if (status == ZE_RESULT_SUCCESS) {
FanCapability fanCaps = {};
memcpy_s(&fanCaps.data, sizeof(uint32_t), response.dataBuffer, sizeof(uint32_t));
// Check SingleSupported capability
bool singleSupported = (fanCaps.singleSupported != 0);
// If SingleSupported is not available, return fanCount as 1
if (!singleSupported) {
fanCount = 1;
}
}
}
return fanCount;
}
void WddmFanImp::setFanIndexForMultipleFans(std::vector<KmdSysman::RequestProperty> &vRequests) {
if (!multipleFansSupported) {
return;
}
KmdSysman::RequestProperty request = {};
// First, set fan mode to single
request.commandId = KmdSysman::Command::Set;
request.componentId = KmdSysman::Component::FanComponent;
request.requestId = KmdSysman::Requests::Fans::CurrentFanMode;
request.dataSize = sizeof(uint32_t);
uint32_t fanMode = KmdSysman::FanUserMode::FanModeSingle;
memcpy_s(request.dataBuffer, sizeof(uint32_t), &fanMode, sizeof(uint32_t));
vRequests.push_back(request);
// Then, set the fan index
request.commandId = KmdSysman::Command::Set;
request.componentId = KmdSysman::Component::FanComponent;
request.requestId = KmdSysman::Requests::Fans::CurrentFanIndex;
request.dataSize = sizeof(uint32_t);
memcpy_s(request.dataBuffer, sizeof(uint32_t), &fanIndex, sizeof(uint32_t));
vRequests.push_back(request);
}
uint32_t WddmFanImp::getResponseOffset() const {
return multipleFansSupported ? 2 : 0;
}
} // namespace L0
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