blob: 1d99c120a51a25a33cbfc831f4bc6c63b876e2ef [file] [log] [blame]
/*
* Copyright (C) 2018 The Android Open Source Project
*
* 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.
*/
#pragma once
#include "HostConnection.h"
#include "IOStream.h"
#include <stdlib.h>
/* This file implements an IOStream that uses VIRTGPU TRANSFER* ioctls on a
* virtio-gpu DRM rendernode device to communicate with a goldfish-pipe
* service on the host side.
*/
class VirtioGpuPipeStream : public IOStream {
public:
typedef enum { ERR_INVALID_SOCKET = -1000 } QemuPipeStreamError;
explicit VirtioGpuPipeStream(size_t bufsize = 10000);
explicit VirtioGpuPipeStream(size_t bufsize, int stream_handle);
~VirtioGpuPipeStream();
int connect(const char* serviceName = 0);
static int openRendernode();
uint64_t initProcessPipe();
virtual void *allocBuffer(size_t minSize);
virtual int commitBuffer(size_t size);
virtual const unsigned char *readFully( void *buf, size_t len);
virtual const unsigned char *commitBufferAndReadFully(
size_t size, void *buf, size_t len);
virtual const unsigned char *read( void *buf, size_t *inout_len);
bool valid() { return m_fd >= 0; }
int getRendernodeFd() { return m_fd; }
int recv(void *buf, size_t len);
virtual int writeFully(const void *buf, size_t len);
int getSocket() const;
private:
// sync. Also resets the write position.
void wait();
// transfer to/from host ops
ssize_t transferToHost(const void* buffer, size_t len);
ssize_t transferFromHost(void* buffer, size_t len);
int m_fd; // rendernode fd
int m_fd_owned; // Do we own the fd? We should consider using
// modern C++ for this.
uint32_t m_virtio_rh; // transfer buffer res handle
uint32_t m_virtio_bo; // transfer bo handle
unsigned char* m_virtio_mapped; // user mapping of bo
// intermediate buffer
size_t m_bufsize;
unsigned char *m_buf;
size_t m_read;
size_t m_readLeft;
size_t m_writtenPos;
};