1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2012 NetApp, Inc. 5 * Copyright (c) 2013 Neel Natu <neel@freebsd.org> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef _UART_BACKEND_H_ 31 #define _UART_BACKEND_H_ 32 33 #include <stdbool.h> 34 35 #include "mevent.h" 36 37 struct uart_softc; 38 struct vm_snapshot_meta; 39 40 void uart_rxfifo_drain(struct uart_softc *sc, bool loopback); 41 int uart_rxfifo_getchar(struct uart_softc *sc); 42 int uart_rxfifo_numchars(struct uart_softc *sc); 43 int uart_rxfifo_putchar(struct uart_softc *sc, uint8_t ch, bool loopback); 44 void uart_rxfifo_reset(struct uart_softc *sc, int size); 45 int uart_rxfifo_size(struct uart_softc *sc); 46 #ifdef BHYVE_SNAPSHOT 47 int uart_rxfifo_snapshot(struct uart_softc *sc, 48 struct vm_snapshot_meta *meta); 49 #endif 50 51 struct uart_softc *uart_init(void); 52 int uart_tty_open(struct uart_softc *sc, const char *path, 53 void (*drain)(int, enum ev_type, void *), void *arg); 54 void uart_softc_lock(struct uart_softc *sc); 55 void uart_softc_unlock(struct uart_softc *sc); 56 #endif /* _UART_BACKEND_H_ */ 57