| // Copyright 2017 The Dawn Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "dawn_native/d3d12/BufferD3D12.h" |
| |
| #include "common/Assert.h" |
| #include "common/Constants.h" |
| #include "common/Math.h" |
| #include "dawn_native/CommandBuffer.h" |
| #include "dawn_native/DynamicUploader.h" |
| #include "dawn_native/d3d12/CommandRecordingContext.h" |
| #include "dawn_native/d3d12/D3D12Error.h" |
| #include "dawn_native/d3d12/DeviceD3D12.h" |
| #include "dawn_native/d3d12/HeapD3D12.h" |
| #include "dawn_native/d3d12/ResidencyManagerD3D12.h" |
| |
| namespace dawn_native { namespace d3d12 { |
| |
| namespace { |
| D3D12_RESOURCE_FLAGS D3D12ResourceFlags(wgpu::BufferUsage usage) { |
| D3D12_RESOURCE_FLAGS flags = D3D12_RESOURCE_FLAG_NONE; |
| |
| if (usage & (wgpu::BufferUsage::Storage | kInternalStorageBuffer)) { |
| flags |= D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS; |
| } |
| |
| return flags; |
| } |
| |
| D3D12_RESOURCE_STATES D3D12BufferUsage(wgpu::BufferUsage usage) { |
| D3D12_RESOURCE_STATES resourceState = D3D12_RESOURCE_STATE_COMMON; |
| |
| if (usage & wgpu::BufferUsage::CopySrc) { |
| resourceState |= D3D12_RESOURCE_STATE_COPY_SOURCE; |
| } |
| if (usage & wgpu::BufferUsage::CopyDst) { |
| resourceState |= D3D12_RESOURCE_STATE_COPY_DEST; |
| } |
| if (usage & (wgpu::BufferUsage::Vertex | wgpu::BufferUsage::Uniform)) { |
| resourceState |= D3D12_RESOURCE_STATE_VERTEX_AND_CONSTANT_BUFFER; |
| } |
| if (usage & wgpu::BufferUsage::Index) { |
| resourceState |= D3D12_RESOURCE_STATE_INDEX_BUFFER; |
| } |
| if (usage & wgpu::BufferUsage::Storage) { |
| resourceState |= D3D12_RESOURCE_STATE_UNORDERED_ACCESS; |
| } |
| if (usage & kReadOnlyStorageBuffer) { |
| resourceState |= (D3D12_RESOURCE_STATE_PIXEL_SHADER_RESOURCE | |
| D3D12_RESOURCE_STATE_NON_PIXEL_SHADER_RESOURCE); |
| } |
| if (usage & wgpu::BufferUsage::Indirect) { |
| resourceState |= D3D12_RESOURCE_STATE_INDIRECT_ARGUMENT; |
| } |
| if (usage & wgpu::BufferUsage::QueryResolve) { |
| // D3D12_RESOURCE_STATE_COPY_DEST is required by ResolveQueryData but we also add |
| // D3D12_RESOURCE_STATE_UNORDERED_ACCESS because the queries will be post-processed |
| // by a compute shader and written to this buffer via a UAV. |
| resourceState |= |
| (D3D12_RESOURCE_STATE_UNORDERED_ACCESS | D3D12_RESOURCE_STATE_COPY_DEST); |
| } |
| |
| return resourceState; |
| } |
| |
| D3D12_HEAP_TYPE D3D12HeapType(wgpu::BufferUsage allowedUsage) { |
| if (allowedUsage & wgpu::BufferUsage::MapRead) { |
| return D3D12_HEAP_TYPE_READBACK; |
| } else if (allowedUsage & wgpu::BufferUsage::MapWrite) { |
| return D3D12_HEAP_TYPE_UPLOAD; |
| } else { |
| return D3D12_HEAP_TYPE_DEFAULT; |
| } |
| } |
| |
| size_t D3D12BufferSizeAlignment(wgpu::BufferUsage usage) { |
| switch (usage) { |
| case wgpu::BufferUsage::Uniform: |
| return D3D12_CONSTANT_BUFFER_DATA_PLACEMENT_ALIGNMENT; |
| default: |
| return 1; |
| } |
| } |
| } // namespace |
| |
| // static |
| ResultOrError<Ref<Buffer>> Buffer::Create(Device* device, const BufferDescriptor* descriptor) { |
| Ref<Buffer> buffer = AcquireRef(new Buffer(device, descriptor)); |
| DAWN_TRY(buffer->Initialize(descriptor->mappedAtCreation)); |
| return buffer; |
| } |
| |
| Buffer::Buffer(Device* device, const BufferDescriptor* descriptor) |
| : BufferBase(device, descriptor) { |
| } |
| |
| MaybeError Buffer::Initialize(bool mappedAtCreation) { |
| D3D12_RESOURCE_DESC resourceDescriptor; |
| resourceDescriptor.Dimension = D3D12_RESOURCE_DIMENSION_BUFFER; |
| resourceDescriptor.Alignment = 0; |
| // D3D buffers are always resource size aligned to 64KB. However, D3D12's validation forbids |
| // binding a CBV to an unaligned size. To prevent, one can always safely align the buffer |
| // desc size to the CBV data alignment as other buffer usages ignore it (no size check). |
| // The validation will still enforce bound checks with the unaligned size returned by |
| // GetSize(). |
| // https://docs.microsoft.com/en-us/windows/win32/direct3d12/uploading-resources#buffer-alignment |
| resourceDescriptor.Width = |
| Align(std::max(GetSize(), uint64_t(4u)), D3D12BufferSizeAlignment(GetUsage())); |
| resourceDescriptor.Height = 1; |
| resourceDescriptor.DepthOrArraySize = 1; |
| resourceDescriptor.MipLevels = 1; |
| resourceDescriptor.Format = DXGI_FORMAT_UNKNOWN; |
| resourceDescriptor.SampleDesc.Count = 1; |
| resourceDescriptor.SampleDesc.Quality = 0; |
| resourceDescriptor.Layout = D3D12_TEXTURE_LAYOUT_ROW_MAJOR; |
| // Add CopyDst for non-mappable buffer initialization with mappedAtCreation |
| // and robust resource initialization. |
| resourceDescriptor.Flags = D3D12ResourceFlags(GetUsage() | wgpu::BufferUsage::CopyDst); |
| |
| auto heapType = D3D12HeapType(GetUsage()); |
| auto bufferUsage = D3D12_RESOURCE_STATE_COMMON; |
| |
| // D3D12 requires buffers on the READBACK heap to have the D3D12_RESOURCE_STATE_COPY_DEST |
| // state |
| if (heapType == D3D12_HEAP_TYPE_READBACK) { |
| bufferUsage |= D3D12_RESOURCE_STATE_COPY_DEST; |
| mFixedResourceState = true; |
| mLastUsage = wgpu::BufferUsage::CopyDst; |
| } |
| |
| // D3D12 requires buffers on the UPLOAD heap to have the D3D12_RESOURCE_STATE_GENERIC_READ |
| // state |
| if (heapType == D3D12_HEAP_TYPE_UPLOAD) { |
| bufferUsage |= D3D12_RESOURCE_STATE_GENERIC_READ; |
| mFixedResourceState = true; |
| mLastUsage = wgpu::BufferUsage::CopySrc; |
| } |
| |
| DAWN_TRY_ASSIGN( |
| mResourceAllocation, |
| ToBackend(GetDevice())->AllocateMemory(heapType, resourceDescriptor, bufferUsage)); |
| |
| // The buffers with mappedAtCreation == true will be initialized in |
| // BufferBase::MapAtCreation(). |
| if (GetDevice()->IsToggleEnabled(Toggle::NonzeroClearResourcesOnCreationForTesting) && |
| !mappedAtCreation) { |
| CommandRecordingContext* commandRecordingContext; |
| DAWN_TRY_ASSIGN(commandRecordingContext, |
| ToBackend(GetDevice())->GetPendingCommandContext()); |
| |
| DAWN_TRY(ClearBuffer(commandRecordingContext, uint8_t(1u))); |
| } |
| |
| return {}; |
| } |
| |
| Buffer::~Buffer() { |
| DestroyInternal(); |
| } |
| |
| ID3D12Resource* Buffer::GetD3D12Resource() const { |
| return mResourceAllocation.GetD3D12Resource(); |
| } |
| |
| // When true is returned, a D3D12_RESOURCE_BARRIER has been created and must be used in a |
| // ResourceBarrier call. Failing to do so will cause the tracked state to become invalid and can |
| // cause subsequent errors. |
| bool Buffer::TrackUsageAndGetResourceBarrier(CommandRecordingContext* commandContext, |
| D3D12_RESOURCE_BARRIER* barrier, |
| wgpu::BufferUsage newUsage) { |
| // Track the underlying heap to ensure residency. |
| Heap* heap = ToBackend(mResourceAllocation.GetResourceHeap()); |
| commandContext->TrackHeapUsage(heap, GetDevice()->GetPendingCommandSerial()); |
| |
| // Return the resource barrier. |
| return TransitionUsageAndGetResourceBarrier(commandContext, barrier, newUsage); |
| } |
| |
| void Buffer::TrackUsageAndTransitionNow(CommandRecordingContext* commandContext, |
| wgpu::BufferUsage newUsage) { |
| D3D12_RESOURCE_BARRIER barrier; |
| |
| if (TrackUsageAndGetResourceBarrier(commandContext, &barrier, newUsage)) { |
| commandContext->GetCommandList()->ResourceBarrier(1, &barrier); |
| } |
| } |
| |
| // When true is returned, a D3D12_RESOURCE_BARRIER has been created and must be used in a |
| // ResourceBarrier call. Failing to do so will cause the tracked state to become invalid and can |
| // cause subsequent errors. |
| bool Buffer::TransitionUsageAndGetResourceBarrier(CommandRecordingContext* commandContext, |
| D3D12_RESOURCE_BARRIER* barrier, |
| wgpu::BufferUsage newUsage) { |
| // Resources in upload and readback heaps must be kept in the COPY_SOURCE/DEST state |
| if (mFixedResourceState) { |
| ASSERT(mLastUsage == newUsage); |
| return false; |
| } |
| |
| D3D12_RESOURCE_STATES lastState = D3D12BufferUsage(mLastUsage); |
| D3D12_RESOURCE_STATES newState = D3D12BufferUsage(newUsage); |
| |
| // If the transition is from-UAV-to-UAV, then a UAV barrier is needed. |
| // If one of the usages isn't UAV, then other barriers are used. |
| bool needsUAVBarrier = lastState == D3D12_RESOURCE_STATE_UNORDERED_ACCESS && |
| newState == D3D12_RESOURCE_STATE_UNORDERED_ACCESS; |
| |
| if (needsUAVBarrier) { |
| barrier->Type = D3D12_RESOURCE_BARRIER_TYPE_UAV; |
| barrier->Flags = D3D12_RESOURCE_BARRIER_FLAG_NONE; |
| barrier->UAV.pResource = GetD3D12Resource(); |
| |
| mLastUsage = newUsage; |
| return true; |
| } |
| |
| // We can skip transitions to already current usages. |
| if (IsSubset(newUsage, mLastUsage)) { |
| return false; |
| } |
| |
| mLastUsage = newUsage; |
| |
| // The COMMON state represents a state where no write operations can be pending, which makes |
| // it possible to transition to and from some states without synchronizaton (i.e. without an |
| // explicit ResourceBarrier call). A buffer can be implicitly promoted to 1) a single write |
| // state, or 2) multiple read states. A buffer that is accessed within a command list will |
| // always implicitly decay to the COMMON state after the call to ExecuteCommandLists |
| // completes - this is because all buffer writes are guaranteed to be completed before the |
| // next ExecuteCommandLists call executes. |
| // https://docs.microsoft.com/en-us/windows/desktop/direct3d12/using-resource-barriers-to-synchronize-resource-states-in-direct3d-12#implicit-state-transitions |
| |
| // To track implicit decays, we must record the pending serial on which a transition will |
| // occur. When that buffer is used again, the previously recorded serial must be compared to |
| // the last completed serial to determine if the buffer has implicity decayed to the common |
| // state. |
| const ExecutionSerial pendingCommandSerial = |
| ToBackend(GetDevice())->GetPendingCommandSerial(); |
| if (pendingCommandSerial > mLastUsedSerial) { |
| lastState = D3D12_RESOURCE_STATE_COMMON; |
| mLastUsedSerial = pendingCommandSerial; |
| } |
| |
| // All possible buffer states used by Dawn are eligible for implicit promotion from COMMON. |
| // These are: COPY_SOURCE, VERTEX_AND_COPY_BUFFER, INDEX_BUFFER, COPY_DEST, |
| // UNORDERED_ACCESS, and INDIRECT_ARGUMENT. Note that for implicit promotion, the |
| // destination state cannot be 1) more than one write state, or 2) both a read and write |
| // state. This goes unchecked here because it should not be allowed through render/compute |
| // pass validation. |
| if (lastState == D3D12_RESOURCE_STATE_COMMON) { |
| return false; |
| } |
| |
| barrier->Type = D3D12_RESOURCE_BARRIER_TYPE_TRANSITION; |
| barrier->Flags = D3D12_RESOURCE_BARRIER_FLAG_NONE; |
| barrier->Transition.pResource = GetD3D12Resource(); |
| barrier->Transition.StateBefore = lastState; |
| barrier->Transition.StateAfter = newState; |
| barrier->Transition.Subresource = D3D12_RESOURCE_BARRIER_ALL_SUBRESOURCES; |
| |
| return true; |
| } |
| |
| D3D12_GPU_VIRTUAL_ADDRESS Buffer::GetVA() const { |
| return mResourceAllocation.GetGPUPointer(); |
| } |
| |
| bool Buffer::IsCPUWritableAtCreation() const { |
| // We use a staging buffer for the buffers with mappedAtCreation == true and created on the |
| // READBACK heap because for the buffers on the READBACK heap, the data written on the CPU |
| // side won't be uploaded to GPU. When we enable zero-initialization, the CPU side memory |
| // of the buffer is all written to 0 but not the GPU side memory, so on the next mapping |
| // operation the zeroes get overwritten by whatever was in the GPU memory when the buffer |
| // was created. With a staging buffer, the data on the CPU side will first upload to the |
| // staging buffer, and copied from the staging buffer to the GPU memory of the current |
| // buffer in the unmap() call. |
| // TODO(enga): Handle CPU-visible memory on UMA |
| return (GetUsage() & wgpu::BufferUsage::MapWrite) != 0; |
| } |
| |
| MaybeError Buffer::MapInternal(bool isWrite, |
| size_t offset, |
| size_t size, |
| const char* contextInfo) { |
| // The mapped buffer can be accessed at any time, so it must be locked to ensure it is never |
| // evicted. This buffer should already have been made resident when it was created. |
| Heap* heap = ToBackend(mResourceAllocation.GetResourceHeap()); |
| DAWN_TRY(ToBackend(GetDevice())->GetResidencyManager()->LockAllocation(heap)); |
| |
| D3D12_RANGE range = {offset, offset + size}; |
| // mMappedData is the pointer to the start of the resource, irrespective of offset. |
| // MSDN says (note the weird use of "never"): |
| // |
| // When ppData is not NULL, the pointer returned is never offset by any values in |
| // pReadRange. |
| // |
| // https://docs.microsoft.com/en-us/windows/win32/api/d3d12/nf-d3d12-id3d12resource-map |
| DAWN_TRY(CheckHRESULT(GetD3D12Resource()->Map(0, &range, &mMappedData), contextInfo)); |
| |
| if (isWrite) { |
| mWrittenMappedRange = range; |
| } |
| |
| return {}; |
| } |
| |
| MaybeError Buffer::MapAtCreationImpl() { |
| // We will use a staging buffer for MapRead buffers instead so we just clear the staging |
| // buffer and initialize the original buffer by copying the staging buffer to the original |
| // buffer one the first time Unmap() is called. |
| ASSERT((GetUsage() & wgpu::BufferUsage::MapWrite) != 0); |
| |
| // The buffers with mappedAtCreation == true will be initialized in |
| // BufferBase::MapAtCreation(). |
| DAWN_TRY(MapInternal(true, 0, size_t(GetSize()), "D3D12 map at creation")); |
| |
| return {}; |
| } |
| |
| MaybeError Buffer::MapAsyncImpl(wgpu::MapMode mode, size_t offset, size_t size) { |
| CommandRecordingContext* commandContext; |
| DAWN_TRY_ASSIGN(commandContext, ToBackend(GetDevice())->GetPendingCommandContext()); |
| DAWN_TRY(EnsureDataInitialized(commandContext)); |
| |
| return MapInternal(mode & wgpu::MapMode::Write, offset, size, "D3D12 map async"); |
| } |
| |
| void Buffer::UnmapImpl() { |
| GetD3D12Resource()->Unmap(0, &mWrittenMappedRange); |
| mMappedData = nullptr; |
| mWrittenMappedRange = {0, 0}; |
| |
| // When buffers are mapped, they are locked to keep them in resident memory. We must unlock |
| // them when they are unmapped. |
| Heap* heap = ToBackend(mResourceAllocation.GetResourceHeap()); |
| ToBackend(GetDevice())->GetResidencyManager()->UnlockAllocation(heap); |
| } |
| |
| void* Buffer::GetMappedPointerImpl() { |
| // The frontend asks that the pointer returned is from the start of the resource |
| // irrespective of the offset passed in MapAsyncImpl, which is what mMappedData is. |
| return mMappedData; |
| } |
| |
| void Buffer::DestroyImpl() { |
| if (mMappedData != nullptr) { |
| // If the buffer is currently mapped, unmap without flushing the writes to the GPU |
| // since the buffer cannot be used anymore. UnmapImpl checks mWrittenRange to know |
| // which parts to flush, so we set it to an empty range to prevent flushes. |
| mWrittenMappedRange = {0, 0}; |
| UnmapImpl(); |
| } |
| |
| ToBackend(GetDevice())->DeallocateMemory(mResourceAllocation); |
| } |
| |
| bool Buffer::CheckIsResidentForTesting() const { |
| Heap* heap = ToBackend(mResourceAllocation.GetResourceHeap()); |
| return heap->IsInList() || heap->IsResidencyLocked(); |
| } |
| |
| bool Buffer::CheckAllocationMethodForTesting(AllocationMethod allocationMethod) const { |
| return mResourceAllocation.GetInfo().mMethod == allocationMethod; |
| } |
| |
| MaybeError Buffer::EnsureDataInitialized(CommandRecordingContext* commandContext) { |
| if (IsDataInitialized() || |
| !GetDevice()->IsToggleEnabled(Toggle::LazyClearResourceOnFirstUse)) { |
| return {}; |
| } |
| |
| DAWN_TRY(InitializeToZero(commandContext)); |
| |
| return {}; |
| } |
| |
| MaybeError Buffer::EnsureDataInitializedAsDestination(CommandRecordingContext* commandContext, |
| uint64_t offset, |
| uint64_t size) { |
| if (IsDataInitialized() || |
| !GetDevice()->IsToggleEnabled(Toggle::LazyClearResourceOnFirstUse)) { |
| return {}; |
| } |
| |
| if (IsFullBufferRange(offset, size)) { |
| SetIsDataInitialized(); |
| } else { |
| DAWN_TRY(InitializeToZero(commandContext)); |
| } |
| |
| return {}; |
| } |
| |
| MaybeError Buffer::EnsureDataInitializedAsDestination(CommandRecordingContext* commandContext, |
| const CopyTextureToBufferCmd* copy) { |
| if (IsDataInitialized() || |
| !GetDevice()->IsToggleEnabled(Toggle::LazyClearResourceOnFirstUse)) { |
| return {}; |
| } |
| |
| if (IsFullBufferOverwrittenInTextureToBufferCopy(copy)) { |
| SetIsDataInitialized(); |
| } else { |
| DAWN_TRY(InitializeToZero(commandContext)); |
| } |
| |
| return {}; |
| } |
| |
| MaybeError Buffer::InitializeToZero(CommandRecordingContext* commandContext) { |
| ASSERT(GetDevice()->IsToggleEnabled(Toggle::LazyClearResourceOnFirstUse)); |
| ASSERT(!IsDataInitialized()); |
| |
| // TODO(crbug.com/dawn/484): skip initializing the buffer when it is created on a heap |
| // that has already been zero initialized. |
| DAWN_TRY(ClearBuffer(commandContext, uint8_t(0u))); |
| SetIsDataInitialized(); |
| GetDevice()->IncrementLazyClearCountForTesting(); |
| |
| return {}; |
| } |
| |
| MaybeError Buffer::ClearBuffer(CommandRecordingContext* commandContext, uint8_t clearValue) { |
| Device* device = ToBackend(GetDevice()); |
| |
| // The state of the buffers on UPLOAD heap must always be GENERIC_READ and cannot be |
| // changed away, so we can only clear such buffer with buffer mapping. |
| if (D3D12HeapType(GetUsage()) == D3D12_HEAP_TYPE_UPLOAD) { |
| DAWN_TRY(MapInternal(true, 0, size_t(GetSize()), "D3D12 map at clear buffer")); |
| memset(mMappedData, clearValue, GetSize()); |
| UnmapImpl(); |
| } else { |
| // TODO(crbug.com/dawn/852): use ClearUnorderedAccessView*() when the buffer usage |
| // includes STORAGE. |
| DynamicUploader* uploader = device->GetDynamicUploader(); |
| UploadHandle uploadHandle; |
| DAWN_TRY_ASSIGN(uploadHandle, |
| uploader->Allocate(GetSize(), device->GetPendingCommandSerial(), |
| kCopyBufferToBufferOffsetAlignment)); |
| |
| memset(uploadHandle.mappedBuffer, clearValue, GetSize()); |
| |
| device->CopyFromStagingToBufferImpl(commandContext, uploadHandle.stagingBuffer, |
| uploadHandle.startOffset, this, 0, GetSize()); |
| } |
| |
| return {}; |
| } |
| }} // namespace dawn_native::d3d12 |