1 /* 2 * Copyright 2023 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <memory> 20 #include <optional> 21 22 #include "VirtGpu.h" 23 24 namespace gfxstream { 25 26 // Emulates parts of the Linux Virtio GPU kernel module and parts of 27 // a virtual machine manager to allow speaking directly to the Gfxstream 28 // host server via rutabaga. 29 class EmulatedVirtioGpu { 30 public: 31 static EmulatedVirtioGpu& Get(); 32 static void Reset(); 33 34 bool Init(bool withGl, bool withVk, bool withVkSnapshots); 35 36 VirtGpuCaps GetCaps(VirtGpuCapset capset); 37 38 std::optional<uint32_t> CreateContext(); 39 void DestroyContext(uint32_t contextId); 40 41 std::optional<uint32_t> CreateBlob(uint32_t contextId, 42 const struct VirtGpuCreateBlob& params); 43 std::optional<uint32_t> CreateVirglBlob(uint32_t contextId, 44 uint32_t width, 45 uint32_t height, 46 uint32_t virglFormat); 47 48 void DestroyResource(uint32_t contextId, 49 uint32_t resourceId); 50 51 uint8_t* Map(uint32_t resourceId); 52 void Unmap(uint32_t resourceId); 53 54 int ExecBuffer(uint32_t contextId, 55 struct VirtGpuExecBuffer& execbuffer, 56 std::optional<uint32_t> blobResourceId); 57 58 int Wait(uint32_t resourceId); 59 60 int TransferFromHost(uint32_t contextId, 61 uint32_t resourceId, 62 uint32_t transferOffset, 63 uint32_t transferSize); 64 int TransferToHost(uint32_t contextId, 65 uint32_t resourceId, 66 uint32_t transferOffset, 67 uint32_t transferSize); 68 69 void SignalEmulatedFence(int fenceId); 70 71 int WaitOnEmulatedFence(int fenceAsFileDescriptor, int timeoutMilliseconds); 72 73 private: 74 EmulatedVirtioGpu(); 75 76 class EmulatedVirtioGpuImpl; 77 std::unique_ptr<EmulatedVirtioGpuImpl> mImpl; 78 }; 79 80 } // namespace gfxstream 81