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https://github.com/intel/compute-runtime.git
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b180a83a24
This patch adds support to open and close the drm fd, so that more granular control of drm fd could be achieved. Related-To: LOCI-3986 Signed-off-by: Joshua Santosh Ranjan <joshua.santosh.ranjan@intel.com>
52 lines
1.3 KiB
C++
52 lines
1.3 KiB
C++
/*
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* Copyright (C) 2023 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 "level_zero/sysman/source/linux/hw_device_id_linux.h"
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#include "shared/source/os_interface/linux/sys_calls.h"
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#include "level_zero/sysman/source/sysman_hw_device_id.h"
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#include <fcntl.h>
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namespace L0 {
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namespace Sysman {
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int SysmanHwDeviceIdDrm::openFileDescriptor() {
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std::unique_lock<std::mutex> lock(fdMutex);
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if (fileDescriptor == -1) {
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fileDescriptor = NEO::SysCalls::open(devNodePath.c_str(), O_RDWR);
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}
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++fdRefCounter;
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return fileDescriptor;
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}
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int SysmanHwDeviceIdDrm::closeFileDescriptor() {
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int closeStatus = 0;
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std::unique_lock<std::mutex> lock(fdMutex);
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DEBUG_BREAK_IF(fdRefCounter == 0u);
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if (fdRefCounter > 0u) {
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--fdRefCounter;
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if (fdRefCounter == 0u && fileDescriptor >= 0) {
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closeStatus = NEO::SysCalls::close(fileDescriptor);
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fileDescriptor = -1;
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}
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}
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return closeStatus;
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}
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std::unique_ptr<NEO::HwDeviceId> createSysmanHwDeviceId(std::unique_ptr<NEO::HwDeviceId> &hwDeviceId) {
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const auto hwDeviceIdDrm = static_cast<NEO::HwDeviceIdDrm *>(hwDeviceId.get());
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return std::make_unique<SysmanHwDeviceIdDrm>(hwDeviceIdDrm->getFileDescriptor(), hwDeviceIdDrm->getPciPath(), hwDeviceIdDrm->getDeviceNode());
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}
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} // namespace Sysman
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} // namespace L0
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