44 lines
1.3 KiB
C++
44 lines
1.3 KiB
C++
/*
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* Copyright (C) 2020-2022 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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#pragma once
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#include "shared/source/helpers/register_offsets.h"
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#include "shared/source/os_interface/linux/device_time_drm.h"
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#include "shared/source/os_interface/linux/drm_neo.h"
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#include "shared/source/os_interface/linux/drm_wrappers.h"
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namespace NEO {
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class DrmNullDevice : public Drm {
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public:
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int ioctl(DrmIoctl request, void *arg) override {
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if (request == DrmIoctl::Getparam || request == DrmIoctl::Query) {
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return Drm::ioctl(request, arg);
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} else if (request == DrmIoctl::RegRead) {
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auto *regArg = static_cast<RegisterRead *>(arg);
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// Handle only 36b timestamp
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if (regArg->offset == (REG_GLOBAL_TIMESTAMP_LDW | 1)) {
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gpuTimestamp += 1000;
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regArg->value = gpuTimestamp & 0x0000000FFFFFFFFF;
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} else if (regArg->offset == REG_GLOBAL_TIMESTAMP_LDW || regArg->offset == REG_GLOBAL_TIMESTAMP_UN) {
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return -1;
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}
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return 0;
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} else {
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return 0;
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}
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}
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DrmNullDevice(std::unique_ptr<HwDeviceIdDrm> &&hwDeviceId, RootDeviceEnvironment &rootDeviceEnvironment) : Drm(std::move(hwDeviceId), rootDeviceEnvironment){};
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protected:
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uint64_t gpuTimestamp = 0;
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};
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} // namespace NEO
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