1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
4 */
5
6#ifndef __CHAN_USER_H__
7#define __CHAN_USER_H__
8
9#include <init.h>
10#include <linux/types.h>
11
12struct chan_opts {
13	void (*const announce)(char *dev_name, int dev);
14	char *xterm_title;
15	int raw;
16};
17
18struct chan_ops {
19	char *type;
20	void *(*init)(char *, int, const struct chan_opts *);
21	int (*open)(int, int, int, void *, char **);
22	void (*close)(int, void *);
23	int (*read)(int, __u8 *, void *);
24	int (*write)(int, const __u8 *, size_t, void *);
25	int (*console_write)(int, const char *, int);
26	int (*window_size)(int, void *, unsigned short *, unsigned short *);
27	void (*free)(void *);
28	int winch;
29};
30
31extern const struct chan_ops fd_ops, null_ops, port_ops, pts_ops, pty_ops,
32	tty_ops, xterm_ops;
33
34extern void generic_close(int fd, void *unused);
35extern int generic_read(int fd, __u8 *c_out, void *unused);
36extern int generic_write(int fd, const __u8 *buf, size_t n, void *unused);
37extern int generic_console_write(int fd, const char *buf, int n);
38extern int generic_window_size(int fd, void *unused, unsigned short *rows_out,
39			       unsigned short *cols_out);
40extern void generic_free(void *data);
41
42struct tty_port;
43extern void register_winch(int fd,  struct tty_port *port);
44extern void register_winch_irq(int fd, int tty_fd, int pid,
45			       struct tty_port *port, unsigned long stack);
46
47#define __channel_help(fn, prefix) \
48__uml_help(fn, prefix "[0-9]*=<channel description>\n" \
49"    Attach a console or serial line to a host channel.  See\n" \
50"    http://user-mode-linux.sourceforge.net/old/input.html for a complete\n" \
51"    description of this switch.\n\n" \
52);
53
54#endif
55