75 lines
2.9 KiB
C++
75 lines
2.9 KiB
C++
/*
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* Copyright (C) 2018-2025 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/device/device.h"
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#include "shared/source/helpers/aligned_memory.h"
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#include "shared/source/helpers/basic_math.h"
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#include "shared/source/helpers/gfx_core_helper.h"
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#include "shared/source/helpers/hw_info.h"
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#include "shared/source/helpers/non_copyable_or_moveable.h"
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#include "shared/source/release_helper/release_helper.h"
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#include "ocl_igc_shared/raytracing/ocl_raytracing_structures.h"
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#include <cstdint>
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namespace NEO {
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class RayTracingHelper : public NonCopyableAndNonMovableClass {
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public:
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static constexpr uint32_t hitInfoSize = 64;
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static constexpr uint32_t bvhStackSize = 96;
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static constexpr uint32_t memoryBackedFifoSizePerDss = 8 * MemoryConstants::kiloByte;
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static constexpr uint32_t maxBvhLevels = 8;
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static constexpr uint32_t maxSizeOfRtStacksPerDss = 4096;
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static constexpr uint32_t fixedSizeOfRtStacksPerDss = 2048;
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static size_t getDispatchGlobalSize() {
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return static_cast<size_t>(alignUp(sizeof(RTDispatchGlobals), MemoryConstants::cacheLineSize));
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}
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static size_t getRTStackSizePerTile(const Device &device, uint32_t tiles, uint32_t maxBvhLevel, uint32_t extraBytesLocal, uint32_t extraBytesGlobal) {
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return static_cast<size_t>(alignUp(getStackSizePerRay(maxBvhLevel, extraBytesLocal) * (getNumRtStacks(device)) + extraBytesGlobal, MemoryConstants::cacheLineSize));
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}
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static size_t getTotalMemoryBackedFifoSize(const Device &device) {
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return static_cast<size_t>(NEO::GfxCoreHelper::getHighestEnabledDualSubSlice(device.getHardwareInfo())) * memoryBackedFifoSizePerDss;
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}
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static size_t getMemoryBackedFifoSizeToPatch() {
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return static_cast<size_t>(Math::log2(memoryBackedFifoSizePerDss / MemoryConstants::kiloByte) - 1);
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}
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static uint32_t getNumRtStacks(const Device &device) {
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return NEO::GfxCoreHelper::getHighestEnabledDualSubSlice(device.getHardwareInfo()) * getNumRtStacksPerDss(device);
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}
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static uint32_t getNumRtStacksPerDss(const Device &device) {
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auto releaseHelper = device.getReleaseHelper();
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if (releaseHelper == nullptr || releaseHelper->isNumRtStacksPerDssFixedValue()) {
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return fixedSizeOfRtStacksPerDss;
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}
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const auto &hwInfo = device.getHardwareInfo();
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UNRECOVERABLE_IF(hwInfo.gtSystemInfo.EUCount == 0)
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uint32_t maxNumEUsPerDSS = hwInfo.gtSystemInfo.MaxEuPerSubSlice;
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uint32_t maxNumThreadsPerEU = hwInfo.gtSystemInfo.ThreadCount / hwInfo.gtSystemInfo.EUCount;
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uint32_t maxSIMTThreadsPerThread = CommonConstants::maximalSimdSize;
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return std::min(maxSizeOfRtStacksPerDss, maxNumEUsPerDSS * maxNumThreadsPerEU * maxSIMTThreadsPerThread);
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}
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static uint32_t getStackSizePerRay(uint32_t maxBvhLevel, uint32_t extraBytesLocal) {
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return hitInfoSize + bvhStackSize * maxBvhLevel + extraBytesLocal;
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}
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};
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} // namespace NEO
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