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42 lines
966 B
C++
42 lines
966 B
C++
/*
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* Copyright (C) 2021 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/os_interface/linux/pci_path.h"
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#include "shared/source/os_interface/linux/sys_calls.h"
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#include <string_view>
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#include <unistd.h>
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namespace NEO {
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std::optional<std::string> getPciPath(int deviceFd) {
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char path[256] = {0};
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size_t pathlen = 256;
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if (SysCalls::getDevicePath(deviceFd, path, pathlen)) {
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return std::nullopt;
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}
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if (SysCalls::access(path, F_OK)) {
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return std::nullopt;
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}
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int readLinkSize = 0;
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char devicePath[256] = {0};
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readLinkSize = SysCalls::readlink(path, devicePath, pathlen);
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if (readLinkSize == -1) {
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return std::nullopt;
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}
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std::string_view devicePathView(devicePath, static_cast<size_t>(readLinkSize));
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devicePathView = devicePathView.substr(devicePathView.find("/drm/render") - 12u, 12u);
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return std::string(devicePathView);
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}
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} // namespace NEO
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