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/*
* Copyright (C) 2020-2025 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/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/device/device_imp.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 <mutex>
namespace L0 {
std::vector<_ze_driver_handle_t *> *globalDriverHandles;
bool levelZeroDriverInitialized = false;
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);
bool oneApiPvcWa = envReader.getSetting("ONEAPI_PVC_SEND_WAR_WA", true);
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);
}
if (envVariables.fp64Emulation) {
executionEnvironment->setFP64EmulationEnabled();
}
executionEnvironment->setMetricsEnabled(envVariables.metrics);
executionEnvironment->setOneApiPvcWaEnv(oneApiPvcWa);
executionEnvironment->incRefInternal();
auto neoDevices = NEO::DeviceFactory::createDevices(*executionEnvironment);
bool isDevicePermissionError = executionEnvironment->isDevicePermissionError();
executionEnvironment->decRefInternal();
if (neoDevices.empty()) {
if (isDevicePermissionError) {
*result = ZE_RESULT_ERROR_INSUFFICIENT_PERMISSIONS;
}
return;
}
auto deviceGroups = NEO::Device::groupDevices(std::move(neoDevices));
for (auto &devices : deviceGroups) {
auto driverHandle = DriverHandle::create(std::move(devices), envVariables, result);
if (driverHandle) {
globalDriverHandles->push_back(driverHandle);
auto &devicesToExpose = static_cast<DriverHandleImp *>(driverHandle)->devicesToExpose;
std::vector<NEO::Device *> neoDeviceToExpose;
neoDeviceToExpose.reserve(devicesToExpose.size());
for (auto deviceToExpose : devicesToExpose) {
neoDeviceToExpose.push_back(Device::fromHandle(deviceToExpose)->getNEODevice());
}
NEO::Device::initializePeerAccessForDevices(DeviceImp::queryPeerAccess, DeviceImp::freeMemoryAllocation, neoDeviceToExpose);
}
}
if (globalDriverHandles->size() > 0) {
*result = ZE_RESULT_SUCCESS;
if (envVariables.metrics) {
*result = MetricDeviceContext::enableMetricApi();
}
if (*result != ZE_RESULT_SUCCESS) {
for (auto &driverHandle : *globalDriverHandles) {
delete static_cast<BaseDriver *>(driverHandle);
}
globalDriverHandles->clear();
} else if (envVariables.pin) {
std::unique_lock<std::mutex> mtx{this->gtpinInitMtx};
this->gtPinInitializationNeeded = true;
}
}
}
ze_result_t DriverImp::initStatus(ZE_RESULT_ERROR_UNINITIALIZED);
ze_result_t DriverImp::driverInit() {
std::call_once(initDriverOnce, [this]() {
ze_result_t result;
this->initialize(&result);
initStatus = result;
});
return initStatus;
}
ze_result_t DriverImp::driverHandleGet(uint32_t *pCount, ze_driver_handle_t *phDriverHandles) {
// Only attempt to Init GtPin when driverHandleGet is called requesting handles.
if (phDriverHandles != nullptr && *pCount > 0) {
Driver::get()->tryInitGtpin();
}
auto driverCount = static_cast<uint32_t>(globalDriverHandles->size());
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] = (*globalDriverHandles)[i];
}
return ZE_RESULT_SUCCESS;
}
void DriverImp::tryInitGtpin() {
if (!this->gtPinInitializationNeeded) {
return;
}
std::unique_lock<std::mutex> mtx{this->gtpinInitMtx};
if (this->gtPinInitializationNeeded) {
this->gtPinInitializationNeeded = false;
std::string gtpinFuncName{"OpenGTPin"};
NEO::PinContext::init(gtpinFuncName);
}
}
static DriverImp driverImp;
Driver *Driver::driver = &driverImp;
std::mutex driverInitMutex;
ze_result_t initDriver() {
auto pid = NEO::SysCalls::getCurrentProcessId();
ze_result_t result = Driver::get()->driverInit();
if (Driver::get()->getPid() != pid) {
std::lock_guard<std::mutex> lock(driverInitMutex);
if (Driver::get()->getPid() != pid) {
Driver::get()->initialize(&result);
}
}
if (result == ZE_RESULT_SUCCESS) {
L0::levelZeroDriverInitialized = true;
} else {
L0::levelZeroDriverInitialized = false;
}
return result;
}
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 {
return initDriver();
}
}
ze_result_t initDrivers(uint32_t *pCount, ze_driver_handle_t *phDrivers, ze_init_driver_type_desc_t *desc) {
ze_result_t result = ZE_RESULT_ERROR_UNINITIALIZED;
if (desc->flags & ZE_INIT_DRIVER_TYPE_FLAG_GPU) {
result = initDriver();
if (result == ZE_RESULT_SUCCESS) {
result = Driver::get()->driverHandleGet(pCount, phDrivers);
}
}
return result;
}
} // namespace L0
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