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
12 struct chan_opts {
13 void (*const announce)(char *dev_name, int dev);
14 char *xterm_title;
15 int raw;
16 };
17
18 struct 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
31 extern const struct chan_ops fd_ops, null_ops, port_ops, pts_ops, pty_ops,
32 tty_ops, xterm_ops;
33
34 extern void generic_close(int fd, void *unused);
35 extern int generic_read(int fd, __u8 *c_out, void *unused);
36 extern int generic_write(int fd, const __u8 *buf, size_t n, void *unused);
37 extern int generic_console_write(int fd, const char *buf, int n);
38 extern int generic_window_size(int fd, void *unused, unsigned short *rows_out,
39 unsigned short *cols_out);
40 extern void generic_free(void *data);
41
42 struct tty_port;
43 extern void register_winch(int fd, struct tty_port *port);
44 extern 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
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