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/*
* Copyright (C) 2019-2025 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#include "shared/source/device/root_device.h"
#include "shared/source/command_stream/command_stream_receiver.h"
#include "shared/source/command_stream/preemption.h"
#include "shared/source/debug_settings/debug_settings_manager.h"
#include "shared/source/device/sub_device.h"
#include "shared/source/execution_environment/execution_environment.h"
#include "shared/source/execution_environment/root_device_environment.h"
#include "shared/source/helpers/api_specific_config.h"
#include "shared/source/helpers/gfx_core_helper.h"
#include "shared/source/helpers/hw_info.h"
#include "shared/source/memory_manager/memory_manager.h"
#include "shared/source/os_interface/debug_env_reader.h"
#include "shared/source/os_interface/os_context.h"
#include "shared/source/os_interface/os_interface.h"
#include "shared/source/utilities/software_tags_manager.h"
namespace NEO {
extern CommandStreamReceiver *createCommandStream(ExecutionEnvironment &executionEnvironment,
uint32_t rootDeviceIndex,
const DeviceBitfield deviceBitfield);
RootDevice::RootDevice(ExecutionEnvironment *executionEnvironment, uint32_t rootDeviceIndex) : Device(executionEnvironment, rootDeviceIndex) {}
RootDevice::~RootDevice() {
if (getDebugSurface()) {
for (auto *subDevice : this->getSubDevices()) {
if (subDevice) {
subDevice->setDebugSurface(nullptr);
}
}
getMemoryManager()->freeGraphicsMemory(debugSurface);
debugSurface = nullptr;
}
if (getRootDeviceEnvironment().tagsManager) {
getRootDeviceEnvironment().tagsManager->shutdown();
}
}
Device *RootDevice::getRootDevice() const {
return const_cast<RootDevice *>(this);
}
void RootDevice::createBindlessHeapsHelper() {
EnvironmentVariableReader envReader;
bool disableGlobalBindless = envReader.getSetting("NEO_L0_SYSMAN_NO_CONTEXT_MODE", false);
if (!disableGlobalBindless && ApiSpecificConfig::getGlobalBindlessHeapConfiguration(this->getReleaseHelper()) && ApiSpecificConfig::getBindlessMode(*this)) {
this->executionEnvironment->rootDeviceEnvironments[getRootDeviceIndex()]->createBindlessHeapsHelper(this, getNumGenericSubDevices() > 1);
}
}
bool RootDevice::createEngines() {
if (hasGenericSubDevices) {
if (getRootDeviceEnvironment().isExposeSingleDeviceMode()) {
return createSingleDeviceEngines();
}
initializeRootCommandStreamReceiver();
} else {
return Device::createEngines();
}
return true;
}
void RootDevice::initializeRootCommandStreamReceiver() {
auto &hwInfo = getHardwareInfo();
auto defaultEngineType = getChosenEngineType(hwInfo);
EngineTypeUsage engineTypeUsage = {defaultEngineType, EngineUsage::regular};
createRootDeviceEngine(engineTypeUsage, getDeviceBitfield());
}
bool RootDevice::createRootDeviceEngine(EngineTypeUsage engineTypeUsage, DeviceBitfield deviceBitfield) {
std::unique_ptr<CommandStreamReceiver> rootCommandStreamReceiver(createCommandStream(*executionEnvironment, rootDeviceIndex, deviceBitfield));
auto &hwInfo = getHardwareInfo();
auto engineType = engineTypeUsage.first;
auto preemptionMode = PreemptionHelper::getDefaultPreemptionMode(hwInfo);
EngineDescriptor engineDescriptor(EngineTypeUsage{engineType, EngineUsage::regular}, deviceBitfield, preemptionMode, deviceBitfield.count() > 1);
auto &gfxCoreHelper = getGfxCoreHelper();
bool isPrimaryEngine = EngineHelpers::isCcs(engineType);
DEBUG_BREAK_IF(EngineHelpers::isBcs(engineType));
isPrimaryEngine &= engineTypeUsage.second == EngineUsage::regular;
if (debugManager.flags.SecondaryContextEngineTypeMask.get() != -1) {
isPrimaryEngine &= (static_cast<uint32_t>(debugManager.flags.SecondaryContextEngineTypeMask.get()) & (1 << static_cast<uint32_t>(engineType))) != 0;
}
bool useContextGroup = isPrimaryEngine && gfxCoreHelper.areSecondaryContextsSupported();
if ((static_cast<uint32_t>(debugManager.flags.SecondaryContextEngineTypeMask.get()) & (1 << static_cast<uint32_t>(engineType))) == 0) {
useContextGroup = false;
}
auto osContext = getMemoryManager()->createAndRegisterOsContext(rootCommandStreamReceiver.get(), engineDescriptor);
osContext->setContextGroup(useContextGroup);
osContext->setIsPrimaryEngine(isPrimaryEngine);
rootCommandStreamReceiver->setupContext(*osContext);
rootCommandStreamReceiver->initializeResources(false, preemptionMode);
rootCommandStreamReceiver->initializeTagAllocation();
rootCommandStreamReceiver->createGlobalFenceAllocation();
if (EngineHelpers::isComputeEngine(engineType)) {
rootCsrCreated = true;
rootCommandStreamReceiver->createWorkPartitionAllocation(*this);
}
commandStreamReceivers.push_back(std::move(rootCommandStreamReceiver));
EngineControl engine{commandStreamReceivers.back().get(), osContext};
allEngines.push_back(engine);
addEngineToEngineGroup(engine);
if (useContextGroup) {
bool hpEngineAvailable = engineTypeUsage.second == EngineUsage::highPriority;
auto contextCount = gfxCoreHelper.getContextGroupContextsCount();
EngineGroupType engineGroupType = gfxCoreHelper.getEngineGroupType(engine.getEngineType(), engine.getEngineUsage(), hwInfo);
auto highPriorityContextCount = gfxCoreHelper.getContextGroupHpContextsCount(engineGroupType, hpEngineAvailable);
if (debugManager.flags.OverrideNumHighPriorityContexts.get() != -1) {
highPriorityContextCount = static_cast<uint32_t>(debugManager.flags.OverrideNumHighPriorityContexts.get());
}
if (getRootDeviceEnvironment().osInterface && getRootDeviceEnvironment().osInterface->getAggregatedProcessCount() > 1) {
const auto numProcesses = getRootDeviceEnvironment().osInterface->getAggregatedProcessCount();
contextCount = std::max(contextCount / numProcesses, 2u);
highPriorityContextCount = std::max(contextCount / 2, 1u);
}
UNRECOVERABLE_IF(secondaryEngines.find(engineType) != secondaryEngines.end());
auto &secondaryEnginesForType = secondaryEngines[engineType];
createSecondaryContexts(engine, secondaryEnginesForType, contextCount, contextCount - highPriorityContextCount, highPriorityContextCount);
}
return true;
}
bool RootDevice::createSingleDeviceEngines() {
auto &gfxCoreHelper = getGfxCoreHelper();
auto &gpgpuEngines = gfxCoreHelper.getGpgpuEngineInstances(getRootDeviceEnvironment());
for (auto &engine : gpgpuEngines) {
if (EngineHelpers::isComputeEngine(engine.first)) {
if (!createRootDeviceEngine(engine, getDeviceBitfield())) {
return false;
}
}
}
return true;
}
} // namespace NEO
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