1 // Copyright 2018 The Dawn Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef DAWNNATIVE_DYNAMICUPLOADER_H_ 16 #define DAWNNATIVE_DYNAMICUPLOADER_H_ 17 18 #include "dawn_native/Forward.h" 19 #include "dawn_native/IntegerTypes.h" 20 #include "dawn_native/RingBufferAllocator.h" 21 #include "dawn_native/StagingBuffer.h" 22 23 // DynamicUploader is the front-end implementation used to manage multiple ring buffers for upload 24 // usage. 25 namespace dawn_native { 26 27 struct UploadHandle { 28 uint8_t* mappedBuffer = nullptr; 29 uint64_t startOffset = 0; 30 StagingBufferBase* stagingBuffer = nullptr; 31 }; 32 33 class DynamicUploader { 34 public: 35 DynamicUploader(DeviceBase* device); 36 ~DynamicUploader() = default; 37 38 // We add functions to Release StagingBuffers to the DynamicUploader as there's 39 // currently no place to track the allocated staging buffers such that they're freed after 40 // pending commands are finished. This should be changed when better resource allocation is 41 // implemented. 42 void ReleaseStagingBuffer(std::unique_ptr<StagingBufferBase> stagingBuffer); 43 44 ResultOrError<UploadHandle> Allocate(uint64_t allocationSize, 45 ExecutionSerial serial, 46 uint64_t offsetAlignment); 47 void Deallocate(ExecutionSerial lastCompletedSerial); 48 49 private: 50 static constexpr uint64_t kRingBufferSize = 4 * 1024 * 1024; 51 52 struct RingBuffer { 53 std::unique_ptr<StagingBufferBase> mStagingBuffer; 54 RingBufferAllocator mAllocator; 55 }; 56 57 ResultOrError<UploadHandle> AllocateInternal(uint64_t allocationSize, 58 ExecutionSerial serial); 59 60 std::vector<std::unique_ptr<RingBuffer>> mRingBuffers; 61 SerialQueue<ExecutionSerial, std::unique_ptr<StagingBufferBase>> mReleasedStagingBuffers; 62 DeviceBase* mDevice; 63 }; 64 } // namespace dawn_native 65 66 #endif // DAWNNATIVE_DYNAMICUPLOADER_H_ 67