mirror of
https://github.com/projectacrn/acrn-hypervisor.git
synced 2025-05-22 15:13:17 +00:00
59e27ce49e
1. enlarge receive Service VM message time to 10s. Now in some extreme environments, Service VM will takes more than 1s to ACK the User VM's requirements. 2. fix a bug to calculate string pointer size. Tracked-On: #7215 Signed-off-by: Fei Li <fei1.li@intel.com>
63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
/*
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* Copyright (C)2021 Intel Corporation
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef _UART_H_
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#define _UART_H_
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#include <sys/types.h>
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#include <stdint.h>
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#include <sys/queue.h>
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#include <pthread.h>
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#include <semaphore.h>
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#include <sys/un.h>
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#define TTY_PATH_MAX 32U
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#define SECOND_TO_US 1000000
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#define WAIT_RECV (SECOND_TO_US>>2)
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#define RETRY_RECV_TIMES 100U
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struct uart_dev {
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char tty_path[TTY_PATH_MAX]; /**< UART device name */
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int tty_fd; /**< the FD of opened UART device */
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};
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/**
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* @brief Allocate UART device instance and initialize UART
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* device according to device name
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*
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* @param path UART device name
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* @return struct uart_dev* Ponit to UART device instance
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*/
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struct uart_dev *init_uart_dev(char *path);
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/**
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* @brief Close UART devcie and free UART device instance
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*
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* @param dev Poin to UART device instance
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*/
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void deinit_uart_dev(struct uart_dev *dev);
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/**
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* @brief Set handler to handle received message
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*/
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ssize_t send_message_by_uart(struct uart_dev *dev, const void *buf, size_t len);
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/**
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* @brief Receive message and retry RETRY_RECV_TIMES time to
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* avoid miss message in some cases.
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*/
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ssize_t receive_message_by_uart(struct uart_dev *dev, void *buf, size_t len);
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/**
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* @brief Get the file descriptor of a UART device
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*/
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static inline int get_uart_dev_fd(struct uart_dev *dev)
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{
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return dev->tty_fd;
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}
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/**
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* @brief Get the name of a UART device
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*/
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static inline char *get_uart_dev_path(struct uart_dev *dev)
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{
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return dev->tty_path;
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}
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#endif
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