1 #pragma once 2 3 /* 4 * Copyright (C) 2017 The Android Open Source Project 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 #include <linux/usb/functionfs.h> 20 21 #include <atomic> 22 #include <condition_variable> 23 #include <mutex> 24 #include <vector> 25 26 #include <android-base/unique_fd.h> 27 #include <asyncio/AsyncIO.h> 28 29 struct aio_block { 30 std::vector<struct iocb> iocb; 31 std::vector<struct iocb*> iocbs; 32 std::vector<struct io_event> events; 33 aio_context_t ctx; 34 int num_submitted; 35 int fd; 36 }; 37 38 struct usb_handle { usb_handleusb_handle39 usb_handle() {} 40 41 std::condition_variable notify; 42 std::mutex lock; 43 bool open_new_connection = true; 44 45 int (*write)(usb_handle* h, const void* data, int len); 46 int (*read)(usb_handle* h, void* data, int len, bool allow_partial); 47 void (*close)(usb_handle* h); 48 49 // FunctionFS 50 android::base::unique_fd control; 51 android::base::unique_fd bulk_out; // "out" from the host's perspective => source for adbd 52 android::base::unique_fd bulk_in; // "in" from the host's perspective => sink for adbd 53 54 // Access to these blocks is very not thread safe. Have one block for each of the 55 // read and write threads. 56 struct aio_block read_aiob; 57 struct aio_block write_aiob; 58 59 bool reads_zero_packets; 60 size_t io_size; 61 }; 62 63 usb_handle* create_usb_handle(unsigned num_bufs, unsigned io_size); 64