| // 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/PipelineLayoutD3D12.h" |
| #include <sstream> |
| |
| #include "common/Assert.h" |
| #include "common/BitSetIterator.h" |
| #include "dawn_native/d3d12/BindGroupLayoutD3D12.h" |
| #include "dawn_native/d3d12/D3D12Error.h" |
| #include "dawn_native/d3d12/DeviceD3D12.h" |
| #include "dawn_native/d3d12/PlatformFunctions.h" |
| |
| using Microsoft::WRL::ComPtr; |
| |
| namespace dawn_native { namespace d3d12 { |
| namespace { |
| |
| // Reserve register names for internal use. This registers map to bindings in the shader, |
| // but are not directly related to allocation of the root signature. |
| // In the root signature, it the index of the root parameter where these registers are |
| // used that determines the layout of the root signature. |
| static constexpr uint32_t kRenderOrComputeInternalRegisterSpace = kMaxBindGroups + 1; |
| static constexpr uint32_t kRenderOrComputeInternalBaseRegister = 0; |
| |
| static constexpr uint32_t kDynamicStorageBufferLengthsRegisterSpace = kMaxBindGroups + 2; |
| static constexpr uint32_t kDynamicStorageBufferLengthsBaseRegister = 0; |
| |
| D3D12_SHADER_VISIBILITY ShaderVisibilityType(wgpu::ShaderStage visibility) { |
| ASSERT(visibility != wgpu::ShaderStage::None); |
| |
| if (visibility == wgpu::ShaderStage::Vertex) { |
| return D3D12_SHADER_VISIBILITY_VERTEX; |
| } |
| |
| if (visibility == wgpu::ShaderStage::Fragment) { |
| return D3D12_SHADER_VISIBILITY_PIXEL; |
| } |
| |
| // For compute or any two combination of stages, visibility must be ALL |
| return D3D12_SHADER_VISIBILITY_ALL; |
| } |
| |
| D3D12_ROOT_PARAMETER_TYPE RootParameterType(wgpu::BufferBindingType type) { |
| switch (type) { |
| case wgpu::BufferBindingType::Uniform: |
| return D3D12_ROOT_PARAMETER_TYPE_CBV; |
| case wgpu::BufferBindingType::Storage: |
| case kInternalStorageBufferBinding: |
| return D3D12_ROOT_PARAMETER_TYPE_UAV; |
| case wgpu::BufferBindingType::ReadOnlyStorage: |
| return D3D12_ROOT_PARAMETER_TYPE_SRV; |
| case wgpu::BufferBindingType::Undefined: |
| UNREACHABLE(); |
| } |
| } |
| |
| } // anonymous namespace |
| |
| ResultOrError<Ref<PipelineLayout>> PipelineLayout::Create( |
| Device* device, |
| const PipelineLayoutDescriptor* descriptor) { |
| Ref<PipelineLayout> layout = AcquireRef(new PipelineLayout(device, descriptor)); |
| DAWN_TRY(layout->Initialize()); |
| return layout; |
| } |
| |
| MaybeError PipelineLayout::Initialize() { |
| Device* device = ToBackend(GetDevice()); |
| // Parameters are D3D12_ROOT_PARAMETER_TYPE which is either a root table, constant, or |
| // descriptor. |
| std::vector<D3D12_ROOT_PARAMETER> rootParameters; |
| |
| size_t rangesCount = 0; |
| for (BindGroupIndex group : IterateBitSet(GetBindGroupLayoutsMask())) { |
| const BindGroupLayout* bindGroupLayout = ToBackend(GetBindGroupLayout(group)); |
| rangesCount += bindGroupLayout->GetCbvUavSrvDescriptorRanges().size() + |
| bindGroupLayout->GetSamplerDescriptorRanges().size(); |
| } |
| |
| // We are taking pointers to `ranges`, so we cannot let it resize while we're pushing to it. |
| std::vector<D3D12_DESCRIPTOR_RANGE> ranges(rangesCount); |
| |
| uint32_t rangeIndex = 0; |
| |
| for (BindGroupIndex group : IterateBitSet(GetBindGroupLayoutsMask())) { |
| const BindGroupLayout* bindGroupLayout = ToBackend(GetBindGroupLayout(group)); |
| |
| // Set the root descriptor table parameter and copy ranges. Ranges are offset by the |
| // bind group index Returns whether or not the parameter was set. A root parameter is |
| // not set if the number of ranges is 0 |
| auto SetRootDescriptorTable = |
| [&](const std::vector<D3D12_DESCRIPTOR_RANGE>& descriptorRanges) -> bool { |
| auto rangeCount = descriptorRanges.size(); |
| if (rangeCount == 0) { |
| return false; |
| } |
| |
| D3D12_ROOT_PARAMETER rootParameter = {}; |
| rootParameter.ParameterType = D3D12_ROOT_PARAMETER_TYPE_DESCRIPTOR_TABLE; |
| rootParameter.ShaderVisibility = D3D12_SHADER_VISIBILITY_ALL; |
| rootParameter.DescriptorTable.NumDescriptorRanges = rangeCount; |
| rootParameter.DescriptorTable.pDescriptorRanges = &ranges[rangeIndex]; |
| |
| for (auto& range : descriptorRanges) { |
| ASSERT(range.RegisterSpace == kRegisterSpacePlaceholder); |
| ranges[rangeIndex] = range; |
| ranges[rangeIndex].RegisterSpace = static_cast<uint32_t>(group); |
| rangeIndex++; |
| } |
| |
| rootParameters.emplace_back(rootParameter); |
| |
| return true; |
| }; |
| |
| if (SetRootDescriptorTable(bindGroupLayout->GetCbvUavSrvDescriptorRanges())) { |
| mCbvUavSrvRootParameterInfo[group] = rootParameters.size() - 1; |
| } |
| if (SetRootDescriptorTable(bindGroupLayout->GetSamplerDescriptorRanges())) { |
| mSamplerRootParameterInfo[group] = rootParameters.size() - 1; |
| } |
| |
| // Init root descriptors in root signatures for dynamic buffer bindings. |
| // These are packed at the beginning of the layout binding info. |
| for (BindingIndex dynamicBindingIndex{0}; |
| dynamicBindingIndex < bindGroupLayout->GetDynamicBufferCount(); |
| ++dynamicBindingIndex) { |
| const BindingInfo& bindingInfo = |
| bindGroupLayout->GetBindingInfo(dynamicBindingIndex); |
| |
| if (bindingInfo.visibility == wgpu::ShaderStage::None) { |
| // Skip dynamic buffers that are not visible. D3D12 does not have None |
| // visibility. |
| continue; |
| } |
| |
| D3D12_ROOT_PARAMETER rootParameter = {}; |
| |
| // Setup root descriptor. |
| D3D12_ROOT_DESCRIPTOR rootDescriptor; |
| rootDescriptor.ShaderRegister = |
| bindGroupLayout->GetShaderRegister(dynamicBindingIndex); |
| rootDescriptor.RegisterSpace = static_cast<uint32_t>(group); |
| |
| // Set root descriptors in root signatures. |
| rootParameter.Descriptor = rootDescriptor; |
| mDynamicRootParameterIndices[group][dynamicBindingIndex] = rootParameters.size(); |
| |
| // Set parameter types according to bind group layout descriptor. |
| rootParameter.ParameterType = RootParameterType(bindingInfo.buffer.type); |
| |
| // Set visibilities according to bind group layout descriptor. |
| rootParameter.ShaderVisibility = ShaderVisibilityType(bindingInfo.visibility); |
| |
| rootParameters.emplace_back(rootParameter); |
| } |
| } |
| |
| // Make sure that we added exactly the number of elements we expected. If we added more, |
| // |ranges| will have resized and the pointers in the |rootParameter|s will be invalid. |
| ASSERT(rangeIndex == rangesCount); |
| |
| D3D12_ROOT_PARAMETER renderOrComputeInternalConstants{}; |
| renderOrComputeInternalConstants.ShaderVisibility = D3D12_SHADER_VISIBILITY_ALL; |
| renderOrComputeInternalConstants.ParameterType = D3D12_ROOT_PARAMETER_TYPE_32BIT_CONSTANTS; |
| // Always allocate 3 constants for either: |
| // - vertex_index and instance_index |
| // - num_workgroups_x, num_workgroups_y and num_workgroups_z |
| // NOTE: We should consider delaying root signature creation until we know how many values |
| // we need |
| renderOrComputeInternalConstants.Constants.Num32BitValues = 3; |
| renderOrComputeInternalConstants.Constants.RegisterSpace = |
| kRenderOrComputeInternalRegisterSpace; |
| renderOrComputeInternalConstants.Constants.ShaderRegister = |
| kRenderOrComputeInternalBaseRegister; |
| mFirstIndexOffsetParameterIndex = rootParameters.size(); |
| mNumWorkgroupsParameterIndex = rootParameters.size(); |
| // NOTE: We should consider moving this entry to earlier in the root signature since offsets |
| // would need to be updated often |
| rootParameters.emplace_back(renderOrComputeInternalConstants); |
| |
| // Loops over all of the dynamic storage buffer bindings in the layout and build |
| // a mapping from the binding to the next offset into the root constant array where |
| // that dynamic storage buffer's binding size will be stored. The next register offset |
| // to use is tracked with |dynamicStorageBufferLengthsShaderRegisterOffset|. |
| // This data will be used by shader translation to emit a load from the root constant |
| // array to use as the binding's size in runtime array calculations. |
| // Each bind group's length data is stored contiguously in the root constant array, |
| // so the loop also computes the first register offset for each group where the |
| // data should start. |
| uint32_t dynamicStorageBufferLengthsShaderRegisterOffset = 0; |
| for (BindGroupIndex group : IterateBitSet(GetBindGroupLayoutsMask())) { |
| const BindGroupLayoutBase* bgl = GetBindGroupLayout(group); |
| |
| mDynamicStorageBufferLengthInfo[group].firstRegisterOffset = |
| dynamicStorageBufferLengthsShaderRegisterOffset; |
| mDynamicStorageBufferLengthInfo[group].bindingAndRegisterOffsets.reserve( |
| bgl->GetBindingCountInfo().dynamicStorageBufferCount); |
| |
| for (BindingIndex bindingIndex(0); bindingIndex < bgl->GetDynamicBufferCount(); |
| ++bindingIndex) { |
| if (bgl->IsStorageBufferBinding(bindingIndex)) { |
| mDynamicStorageBufferLengthInfo[group].bindingAndRegisterOffsets.push_back( |
| {bgl->GetBindingInfo(bindingIndex).binding, |
| dynamicStorageBufferLengthsShaderRegisterOffset++}); |
| } |
| } |
| |
| ASSERT(mDynamicStorageBufferLengthInfo[group].bindingAndRegisterOffsets.size() == |
| bgl->GetBindingCountInfo().dynamicStorageBufferCount); |
| } |
| ASSERT(dynamicStorageBufferLengthsShaderRegisterOffset <= |
| kMaxDynamicStorageBuffersPerPipelineLayout); |
| |
| D3D12_ROOT_PARAMETER dynamicStorageBufferLengthConstants{}; |
| dynamicStorageBufferLengthConstants.ShaderVisibility = D3D12_SHADER_VISIBILITY_ALL; |
| dynamicStorageBufferLengthConstants.ParameterType = |
| D3D12_ROOT_PARAMETER_TYPE_32BIT_CONSTANTS; |
| dynamicStorageBufferLengthConstants.Constants.Num32BitValues = |
| dynamicStorageBufferLengthsShaderRegisterOffset; |
| dynamicStorageBufferLengthConstants.Constants.RegisterSpace = |
| kDynamicStorageBufferLengthsRegisterSpace; |
| dynamicStorageBufferLengthConstants.Constants.ShaderRegister = |
| kDynamicStorageBufferLengthsBaseRegister; |
| mDynamicStorageBufferLengthsParameterIndex = rootParameters.size(); |
| rootParameters.emplace_back(dynamicStorageBufferLengthConstants); |
| |
| D3D12_ROOT_SIGNATURE_DESC rootSignatureDescriptor; |
| rootSignatureDescriptor.NumParameters = rootParameters.size(); |
| rootSignatureDescriptor.pParameters = rootParameters.data(); |
| rootSignatureDescriptor.NumStaticSamplers = 0; |
| rootSignatureDescriptor.pStaticSamplers = nullptr; |
| rootSignatureDescriptor.Flags = |
| D3D12_ROOT_SIGNATURE_FLAG_ALLOW_INPUT_ASSEMBLER_INPUT_LAYOUT; |
| |
| ComPtr<ID3DBlob> signature; |
| ComPtr<ID3DBlob> error; |
| HRESULT hr = device->GetFunctions()->d3d12SerializeRootSignature( |
| &rootSignatureDescriptor, D3D_ROOT_SIGNATURE_VERSION_1, &signature, &error); |
| if (DAWN_UNLIKELY(FAILED(hr))) { |
| std::ostringstream messageStream; |
| if (error) { |
| messageStream << static_cast<const char*>(error->GetBufferPointer()); |
| |
| // |error| is observed to always end with a \n, but is not |
| // specified to do so, so we add an extra newline just in case. |
| messageStream << std::endl; |
| } |
| messageStream << "D3D12 serialize root signature"; |
| DAWN_TRY(CheckHRESULT(hr, messageStream.str().c_str())); |
| } |
| DAWN_TRY(CheckHRESULT(device->GetD3D12Device()->CreateRootSignature( |
| 0, signature->GetBufferPointer(), signature->GetBufferSize(), |
| IID_PPV_ARGS(&mRootSignature)), |
| "D3D12 create root signature")); |
| return {}; |
| } |
| |
| uint32_t PipelineLayout::GetCbvUavSrvRootParameterIndex(BindGroupIndex group) const { |
| ASSERT(group < kMaxBindGroupsTyped); |
| return mCbvUavSrvRootParameterInfo[group]; |
| } |
| |
| uint32_t PipelineLayout::GetSamplerRootParameterIndex(BindGroupIndex group) const { |
| ASSERT(group < kMaxBindGroupsTyped); |
| return mSamplerRootParameterInfo[group]; |
| } |
| |
| ID3D12RootSignature* PipelineLayout::GetRootSignature() const { |
| return mRootSignature.Get(); |
| } |
| |
| const PipelineLayout::DynamicStorageBufferLengthInfo& |
| PipelineLayout::GetDynamicStorageBufferLengthInfo() const { |
| return mDynamicStorageBufferLengthInfo; |
| } |
| |
| uint32_t PipelineLayout::GetDynamicRootParameterIndex(BindGroupIndex group, |
| BindingIndex bindingIndex) const { |
| ASSERT(group < kMaxBindGroupsTyped); |
| ASSERT(bindingIndex < kMaxDynamicBuffersPerPipelineLayoutTyped); |
| ASSERT(GetBindGroupLayout(group)->GetBindingInfo(bindingIndex).buffer.hasDynamicOffset); |
| ASSERT(GetBindGroupLayout(group)->GetBindingInfo(bindingIndex).visibility != |
| wgpu::ShaderStage::None); |
| return mDynamicRootParameterIndices[group][bindingIndex]; |
| } |
| |
| uint32_t PipelineLayout::GetFirstIndexOffsetRegisterSpace() const { |
| return kRenderOrComputeInternalRegisterSpace; |
| } |
| |
| uint32_t PipelineLayout::GetFirstIndexOffsetShaderRegister() const { |
| return kRenderOrComputeInternalBaseRegister; |
| } |
| |
| uint32_t PipelineLayout::GetFirstIndexOffsetParameterIndex() const { |
| return mFirstIndexOffsetParameterIndex; |
| } |
| |
| uint32_t PipelineLayout::GetNumWorkgroupsRegisterSpace() const { |
| return kRenderOrComputeInternalRegisterSpace; |
| } |
| |
| uint32_t PipelineLayout::GetNumWorkgroupsShaderRegister() const { |
| return kRenderOrComputeInternalBaseRegister; |
| } |
| |
| uint32_t PipelineLayout::GetNumWorkgroupsParameterIndex() const { |
| return mNumWorkgroupsParameterIndex; |
| } |
| |
| uint32_t PipelineLayout::GetDynamicStorageBufferLengthsRegisterSpace() const { |
| return kDynamicStorageBufferLengthsRegisterSpace; |
| } |
| |
| uint32_t PipelineLayout::GetDynamicStorageBufferLengthsShaderRegister() const { |
| return kDynamicStorageBufferLengthsBaseRegister; |
| } |
| |
| uint32_t PipelineLayout::GetDynamicStorageBufferLengthsParameterIndex() const { |
| return mDynamicStorageBufferLengthsParameterIndex; |
| } |
| |
| ID3D12CommandSignature* PipelineLayout::GetDispatchIndirectCommandSignatureWithNumWorkgroups() { |
| // mDispatchIndirectCommandSignatureWithNumWorkgroups won't be created until it is needed. |
| if (mDispatchIndirectCommandSignatureWithNumWorkgroups.Get() != nullptr) { |
| return mDispatchIndirectCommandSignatureWithNumWorkgroups.Get(); |
| } |
| |
| D3D12_INDIRECT_ARGUMENT_DESC argumentDescs[2] = {}; |
| argumentDescs[0].Type = D3D12_INDIRECT_ARGUMENT_TYPE_CONSTANT; |
| argumentDescs[0].Constant.RootParameterIndex = GetNumWorkgroupsParameterIndex(); |
| argumentDescs[0].Constant.Num32BitValuesToSet = 3; |
| argumentDescs[0].Constant.DestOffsetIn32BitValues = 0; |
| |
| // A command signature must contain exactly 1 Draw / Dispatch / DispatchMesh / DispatchRays |
| // command. That command must come last. |
| argumentDescs[1].Type = D3D12_INDIRECT_ARGUMENT_TYPE_DISPATCH; |
| |
| D3D12_COMMAND_SIGNATURE_DESC programDesc = {}; |
| programDesc.ByteStride = 6 * sizeof(uint32_t); |
| programDesc.NumArgumentDescs = 2; |
| programDesc.pArgumentDescs = argumentDescs; |
| |
| // The root signature must be specified if and only if the command signature changes one of |
| // the root arguments. |
| ToBackend(GetDevice()) |
| ->GetD3D12Device() |
| ->CreateCommandSignature( |
| &programDesc, GetRootSignature(), |
| IID_PPV_ARGS(&mDispatchIndirectCommandSignatureWithNumWorkgroups)); |
| return mDispatchIndirectCommandSignatureWithNumWorkgroups.Get(); |
| } |
| |
| }} // namespace dawn_native::d3d12 |
