98 lines
3.7 KiB
C++
98 lines
3.7 KiB
C++
/*
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* Copyright (C) 2022-2024 Intel Corporation
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*
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* SPDX-License-Identifier: MIT
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*
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*/
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#include "shared/source/debug_settings/debug_settings_manager.h"
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#include "shared/source/execution_environment/execution_environment.h"
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#include "shared/source/execution_environment/root_device_environment.h"
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#include "shared/source/os_interface/linux/drm_memory_operations_handler.h"
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#include "shared/source/os_interface/linux/file_descriptor.h"
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#include "shared/source/utilities/directory.h"
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#include <fcntl.h>
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#include <unistd.h>
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namespace NEO {
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void ExecutionEnvironment::adjustRootDeviceEnvironments() {
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for (auto rootDeviceIndex = 0u; rootDeviceIndex < rootDeviceEnvironments.size(); rootDeviceIndex++) {
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auto drmMemoryOperationsHandler = static_cast<DrmMemoryOperationsHandler *>(rootDeviceEnvironments[rootDeviceIndex]->memoryOperationsInterface.get());
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drmMemoryOperationsHandler->setRootDeviceIndex(rootDeviceIndex);
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}
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}
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void ExecutionEnvironment::configureCcsMode() {
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const auto &ccsString = debugManager.flags.ZEX_NUMBER_OF_CCS.get();
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if (ccsString.compare("default") == 0 ||
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ccsString.empty()) {
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return;
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}
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char *endPtr = nullptr;
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uint32_t ccsMode = static_cast<uint32_t>(std::strtoul(ccsString.c_str(), &endPtr, 10));
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if (endPtr == ccsString.c_str()) {
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return;
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}
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const std::string drmPath = "/sys/class/drm";
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std::string expectedFilePrefix = drmPath + "/card";
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auto files = Directory::getFiles(drmPath.c_str());
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for (const auto &file : files) {
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if (file.find(expectedFilePrefix.c_str()) == std::string::npos) {
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continue;
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}
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std::string gtPath = file + "/gt";
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auto gtFiles = Directory::getFiles(gtPath.c_str());
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expectedFilePrefix = gtPath + "/gt";
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for (const auto >File : gtFiles) {
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if (gtFile.find(expectedFilePrefix.c_str()) == std::string::npos) {
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continue;
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}
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std::string ccsFile = gtFile + "/ccs_mode";
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auto fd = FileDescriptor(ccsFile.c_str(), O_RDWR);
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if (fd < 0) {
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if ((errno == -EACCES) || (errno == -EPERM)) {
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fprintf(stderr, "No read and write permissions for %s, System administrator needs to grant permissions to allow modification of this file from user space\n", ccsFile.c_str());
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fprintf(stdout, "No read and write permissions for %s, System administrator needs to grant permissions to allow modification of this file from user space\n", ccsFile.c_str());
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}
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continue;
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}
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uint32_t ccsValue = 0;
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ssize_t ret = SysCalls::read(fd, &ccsValue, sizeof(uint32_t));
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PRINT_DEBUG_STRING(debugManager.flags.PrintDebugMessages.get() && (ret < 0), stderr, "read() on %s failed errno = %d | ret = %d \n",
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ccsFile.c_str(), errno, ret);
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if ((ret < 0) || (ccsValue == ccsMode)) {
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continue;
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}
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do {
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ret = SysCalls::write(fd, &ccsMode, sizeof(uint32_t));
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} while (ret == -1 && errno == -EBUSY);
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if (ret > 0) {
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deviceCcsModeVec.emplace_back(ccsFile, ccsValue);
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}
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}
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}
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}
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void ExecutionEnvironment::restoreCcsMode() {
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for (auto &[ccsFile, ccsMode] : deviceCcsModeVec) {
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auto fd = FileDescriptor(ccsFile.c_str(), O_WRONLY);
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DEBUG_BREAK_IF(fd < 0);
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if (fd > 0) {
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[[maybe_unused]] auto ret = SysCalls::write(fd, &ccsMode, sizeof(uint32_t));
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DEBUG_BREAK_IF(ret < 0);
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}
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}
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deviceCcsModeVec.clear();
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}
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} // namespace NEO
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