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/*
* Copyright (C) 2018-2024 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#include "shared/source/os_interface/linux/os_context_linux.h"
#include "shared/source/debug_settings/debug_settings_manager.h"
#include "shared/source/execution_environment/execution_environment.h"
#include "shared/source/execution_environment/root_device_environment.h"
#include "shared/source/helpers/engine_node_helper.h"
#include "shared/source/helpers/hw_info.h"
#include "shared/source/helpers/ptr_math.h"
#include "shared/source/os_interface/linux/drm_neo.h"
#include "shared/source/os_interface/linux/ioctl_helper.h"
#include "shared/source/os_interface/os_context.h"
#include "shared/source/os_interface/os_interface.h"
#include "shared/source/os_interface/product_helper.h"
#include "shared/source/os_interface/sys_calls_common.h"
namespace NEO {
OsContext *OsContextLinux::create(OSInterface *osInterface, uint32_t rootDeviceIndex, uint32_t contextId, const EngineDescriptor &engineDescriptor) {
if (osInterface) {
return new OsContextLinux(*osInterface->getDriverModel()->as<Drm>(), rootDeviceIndex, contextId, engineDescriptor);
}
return new OsContext(rootDeviceIndex, contextId, engineDescriptor);
}
OsContextLinux::OsContextLinux(Drm &drm, uint32_t rootDeviceIndex, uint32_t contextId, const EngineDescriptor &engineDescriptor)
: OsContext(rootDeviceIndex, contextId, engineDescriptor),
drm(drm) {
pagingFence.fill(0u);
fenceVal.fill(0u);
}
bool OsContextLinux::initializeContext(bool allocateInterrupt) {
auto hwInfo = drm.getRootDeviceEnvironment().getHardwareInfo();
auto defaultEngineType = getChosenEngineType(*hwInfo);
if (engineType == defaultEngineType && !isLowPriority() && !isInternalEngine()) {
this->setDefaultContext(true);
}
bool submitDirect = false;
this->isDirectSubmissionAvailable(*drm.getRootDeviceEnvironment().getHardwareInfo(), submitDirect);
if (drm.isPerContextVMRequired()) {
this->drmVmIds.resize(deviceBitfield.size(), 0);
}
for (auto deviceIndex = 0u; deviceIndex < deviceBitfield.size(); deviceIndex++) {
if (deviceBitfield.test(deviceIndex)) {
auto drmVmId = drm.getVirtualMemoryAddressSpace(deviceIndex);
if (drm.isPerContextVMRequired()) {
drmVmId = deviceIndex;
[[maybe_unused]] auto ret = drm.createDrmVirtualMemory(drmVmId);
DEBUG_BREAK_IF(drmVmId == 0);
DEBUG_BREAK_IF(ret != 0);
if (ret != 0) {
drmVmId = 0;
}
UNRECOVERABLE_IF(this->drmVmIds.size() <= deviceIndex);
this->drmVmIds[deviceIndex] = drmVmId;
}
auto drmContextId = drm.getIoctlHelper()->createDrmContext(drm, *this, drmVmId, deviceIndex, allocateInterrupt);
if (drmContextId < 0) {
return false;
}
if (drm.isPerContextVMRequired() && this->drmVmIds[deviceIndex] == 0) {
drmVmId = 0;
[[maybe_unused]] auto ret = drm.queryVmId(drmContextId, drmVmId);
DEBUG_BREAK_IF(drmVmId == 0);
DEBUG_BREAK_IF(ret != 0);
this->drmVmIds[deviceIndex] = drmVmId;
}
this->drmContextIds.push_back(drmContextId);
}
}
return true;
}
bool OsContextLinux::isDirectSubmissionSupported() const {
auto &rootDeviceEnvironment = this->getDrm().getRootDeviceEnvironment();
auto &productHelper = rootDeviceEnvironment.getHelper<ProductHelper>();
return this->getDrm().isVmBindAvailable() && productHelper.isDirectSubmissionSupported(rootDeviceEnvironment.getReleaseHelper());
}
Drm &OsContextLinux::getDrm() const {
return this->drm;
}
void OsContextLinux::waitForPagingFence() {
for (auto drmIterator = 0u; drmIterator < this->deviceBitfield.size(); drmIterator++) {
if (this->deviceBitfield.test(drmIterator)) {
this->waitForBind(drmIterator);
}
}
}
void OsContextLinux::waitForBind(uint32_t drmIterator) {
if (drm.isPerContextVMRequired()) {
if (pagingFence[drmIterator] >= fenceVal[drmIterator]) {
return;
}
auto lock = drm.lockBindFenceMutex();
auto fenceAddress = castToUint64(&this->pagingFence[drmIterator]);
auto fenceValue = this->fenceVal[drmIterator];
lock.unlock();
drm.waitUserFence(0u, fenceAddress, fenceValue, Drm::ValueWidth::u64, -1, drm.getIoctlHelper()->getWaitUserFenceSoftFlag(), false, NEO::InterruptId::notUsed, nullptr);
} else {
drm.waitForBind(drmIterator);
}
}
void OsContextLinux::reInitializeContext() {}
uint64_t OsContextLinux::getOfflineDumpContextId(uint32_t deviceIndex) const {
if (deviceIndex < drmContextIds.size()) {
const auto processId = SysCalls::getProcessId();
const auto drmContextId = drmContextIds[deviceIndex];
return static_cast<uint64_t>(processId) << 32 |
static_cast<uint64_t>(drmContextId);
}
return 0;
}
OsContextLinux::~OsContextLinux() {
if (contextInitialized) {
for (auto drmContextId : drmContextIds) {
drm.destroyDrmContext(drmContextId);
}
}
drmContextIds.clear();
drmVmIds.clear();
}
} // namespace NEO
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