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77 lines
2.3 KiB
77 lines
2.3 KiB
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include "HostConnection.h"
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#include "IOStream.h"
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#include <stdlib.h>
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/* This file implements an IOStream that uses VIRTGPU TRANSFER* ioctls on a
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* virtio-gpu DRM rendernode device to communicate with a goldfish-pipe
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* service on the host side.
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*/
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class VirtioGpuPipeStream : public IOStream {
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public:
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typedef enum { ERR_INVALID_SOCKET = -1000 } QemuPipeStreamError;
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explicit VirtioGpuPipeStream(size_t bufsize = 10000);
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~VirtioGpuPipeStream();
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int connect(const char* serviceName = 0);
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static int openRendernode();
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uint64_t initProcessPipe();
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virtual void *allocBuffer(size_t minSize);
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virtual int commitBuffer(size_t size);
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virtual const unsigned char *readFully( void *buf, size_t len);
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virtual const unsigned char *commitBufferAndReadFully(
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size_t size, void *buf, size_t len);
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virtual const unsigned char *read( void *buf, size_t *inout_len);
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bool valid() { return m_fd >= 0; }
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int getRendernodeFd() { return m_fd; }
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int recv(void *buf, size_t len);
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virtual int writeFully(const void *buf, size_t len);
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int getSocket() const;
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private:
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// sync. Also resets the write position.
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void wait();
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// transfer to/from host ops
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ssize_t transferToHost(const void* buffer, size_t len);
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ssize_t transferFromHost(void* buffer, size_t len);
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int m_fd; // rendernode fd
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uint32_t m_virtio_rh; // transfer buffer res handle
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uint32_t m_virtio_bo; // transfer bo handle
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unsigned char* m_virtio_mapped; // user mapping of bo
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// intermediate buffer
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size_t m_bufsize;
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unsigned char *m_buf;
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size_t m_read;
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size_t m_readLeft;
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size_t m_writtenPos;
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VirtioGpuPipeStream(int sock, size_t bufSize);
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};
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