mirror of
https://github.com/intel/compute-runtime.git
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68 lines
2.0 KiB
C++
68 lines
2.0 KiB
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/device/device.h"
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#include "shared/source/os_interface/linux/drm_neo.h"
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#include "shared/source/os_interface/linux/os_interface.h"
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#include "shared/source/os_interface/linux/sys_calls.h"
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#include "opencl/source/cl_device/cl_device.h"
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#include "opencl/source/platform/platform.h"
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#include "opencl/source/sharings/va/va_device.h"
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#include <sys/stat.h>
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#include <system_error>
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#include <unistd.h>
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#include <va/va_backend.h>
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namespace NEO {
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ClDevice *VADevice::getRootDeviceFromVaDisplay(Platform *pPlatform, VADisplay vaDisplay) {
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VADisplayContextP pDisplayContext_test = reinterpret_cast<VADisplayContextP>(vaDisplay);
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UNRECOVERABLE_IF(pDisplayContext_test->vadpy_magic != 0x56414430);
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VADriverContextP pDriverContext_test = pDisplayContext_test->pDriverContext;
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int deviceFd = *static_cast<int *>(pDriverContext_test->drm_state);
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UNRECOVERABLE_IF(deviceFd < 0);
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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 nullptr;
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}
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if (SysCalls::access(path, F_OK)) {
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return nullptr;
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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 nullptr;
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}
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std::string_view prefixView = "../../devices/pci0000:00/0000:";
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std::string_view devicePathView(devicePath, static_cast<size_t>(readLinkSize));
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devicePathView.remove_prefix(prefixView.size());
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devicePathView = devicePathView.substr(0, 7);
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for (size_t i = 0; i < pPlatform->getNumDevices(); ++i) {
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auto device = pPlatform->getClDevice(i);
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NEO::Device *neoDevice = &device->getDevice();
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auto *drm = neoDevice->getRootDeviceEnvironment().osInterface->get()->getDrm();
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auto pciPath = drm->getPciPath();
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if (devicePathView == pciPath) {
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return device;
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}
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}
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return nullptr;
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}
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} // namespace NEO
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