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/*
* Copyright (C) 2020-2024 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#include "level_zero/core/source/driver/driver.h"
#include "shared/source/device/device.h"
#include "shared/source/execution_environment/execution_environment.h"
#include "shared/source/helpers/gfx_core_helper.h"
#include "shared/source/os_interface/debug_env_reader.h"
#include "shared/source/os_interface/device_factory.h"
#include "shared/source/os_interface/sys_calls_common.h"
#include "shared/source/pin/pin.h"
#include "level_zero/core/source/device/device.h"
#include "level_zero/core/source/driver/driver_handle_imp.h"
#include "level_zero/core/source/driver/driver_imp.h"
#include "level_zero/tools/source/metrics/metric.h"
#include "driver_version.h"
#include "log_manager.h"
#include <memory>
#include <mutex>
#include <thread>
namespace L0 {
_ze_driver_handle_t *globalDriverHandle;
bool levelZeroDriverInitialized = false;
uint32_t driverCount = 0;
void DriverImp::initialize(ze_result_t *result) {
*result = ZE_RESULT_ERROR_UNINITIALIZED;
pid = NEO::SysCalls::getCurrentProcessId();
NEO::EnvironmentVariableReader envReader;
L0EnvVariables envVariables = {};
envVariables.affinityMask =
envReader.getSetting("ZE_AFFINITY_MASK", std::string(""));
envVariables.programDebugging =
envReader.getSetting("ZET_ENABLE_PROGRAM_DEBUGGING", 0);
envVariables.metrics =
envReader.getSetting("ZET_ENABLE_METRICS", false);
envVariables.pin =
envReader.getSetting("ZET_ENABLE_PROGRAM_INSTRUMENTATION", false);
envVariables.sysman =
envReader.getSetting("ZES_ENABLE_SYSMAN", false);
envVariables.pciIdDeviceOrder =
envReader.getSetting("ZE_ENABLE_PCI_ID_DEVICE_ORDER", false);
envVariables.fp64Emulation =
envReader.getSetting("NEO_FP64_EMULATION", false);
envVariables.deviceHierarchyMode =
envReader.getSetting("ZE_FLAT_DEVICE_HIERARCHY", std::string(NEO::deviceHierarchyUnk));
auto executionEnvironment = new NEO::ExecutionEnvironment();
UNRECOVERABLE_IF(nullptr == executionEnvironment);
if (!NEO::debugManager.flags.ExperimentalEnableL0DebuggerForOpenCL.get()) {
const auto dbgMode = NEO::getDebuggingMode(envVariables.programDebugging);
executionEnvironment->setDebuggingMode(dbgMode);
}
// Logging enablement if opted
NEO::initLogger();
if (envVariables.fp64Emulation) {
executionEnvironment->setFP64EmulationEnabled();
}
executionEnvironment->setMetricsEnabled(envVariables.metrics);
executionEnvironment->incRefInternal();
auto neoDevices = NEO::DeviceFactory::createDevices(*executionEnvironment);
executionEnvironment->decRefInternal();
if (!neoDevices.empty()) {
globalDriverHandle = DriverHandle::create(std::move(neoDevices), envVariables, result);
if (globalDriverHandle != nullptr) {
driverCount = 1;
*result = ZE_RESULT_SUCCESS;
if (envVariables.metrics) {
*result = MetricDeviceContext::enableMetricApi();
}
if (*result != ZE_RESULT_SUCCESS) {
delete globalDriver;
globalDriverHandle = nullptr;
globalDriver = nullptr;
driverCount = 0;
} else if (envVariables.pin) {
std::unique_lock<std::recursive_mutex> mtx{this->gtpinInitMtx};
this->gtPinInitializationStatus = GtPinInitializationStatus::pending;
}
}
}
}
ze_result_t DriverImp::initStatus(ZE_RESULT_ERROR_UNINITIALIZED);
ze_result_t DriverImp::driverInit(ze_init_flags_t flags) {
std::call_once(initDriverOnce, [this]() {
ze_result_t result;
this->initialize(&result);
initStatus = result;
});
return initStatus;
}
ze_result_t driverHandleGet(uint32_t *pCount, ze_driver_handle_t *phDriverHandles) {
auto retVal = Driver::get()->initGtpin();
if (retVal != ZE_RESULT_SUCCESS) {
return retVal;
}
if (*pCount == 0) {
*pCount = driverCount;
return ZE_RESULT_SUCCESS;
}
if (*pCount > driverCount) {
*pCount = driverCount;
}
if (phDriverHandles == nullptr) {
return ZE_RESULT_ERROR_INVALID_NULL_POINTER;
}
for (uint32_t i = 0; i < *pCount; i++) {
phDriverHandles[i] = globalDriverHandle;
}
return ZE_RESULT_SUCCESS;
}
ze_result_t DriverImp::initGtpin() {
auto retVal = ZE_RESULT_SUCCESS;
if (this->gtPinInitializationStatus == GtPinInitializationStatus::notNeeded) {
return retVal;
}
std::unique_lock<std::recursive_mutex> mtx{this->gtpinInitMtx};
if (this->gtPinInitializationStatus == GtPinInitializationStatus::inProgress) {
return retVal;
}
if (this->gtPinInitializationStatus == GtPinInitializationStatus::pending) {
this->gtPinInitializationStatus = GtPinInitializationStatus::inProgress;
std::string gtpinFuncName{"OpenGTPin"};
if (false == NEO::PinContext::init(gtpinFuncName)) {
this->gtPinInitializationStatus = GtPinInitializationStatus::error;
}
}
if (this->gtPinInitializationStatus == GtPinInitializationStatus::error) {
retVal = ZE_RESULT_ERROR_DEPENDENCY_UNAVAILABLE;
}
return retVal;
}
static DriverImp driverImp;
Driver *Driver::driver = &driverImp;
std::mutex driverInitMutex;
ze_result_t init(ze_init_flags_t flags) {
if (flags && !(flags & ZE_INIT_FLAG_GPU_ONLY)) {
L0::levelZeroDriverInitialized = false;
return ZE_RESULT_ERROR_UNINITIALIZED;
} else {
auto pid = NEO::SysCalls::getCurrentProcessId();
ze_result_t result = Driver::get()->driverInit(flags);
if (Driver::get()->getPid() != pid) {
std::lock_guard<std::mutex> lock(driverInitMutex);
if (Driver::get()->getPid() != pid) {
ze_result_t result;
Driver::get()->initialize(&result);
}
}
if (result == ZE_RESULT_SUCCESS) {
L0::levelZeroDriverInitialized = true;
} else {
L0::levelZeroDriverInitialized = false;
}
return result;
}
}
} // namespace L0
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