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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/um/include/shared/chan_user.h
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/*

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 * Copyright (C) 2000, 2001 Jeff Dike ([email protected])

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 * Licensed under the GPL

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 */

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#ifndef __CHAN_USER_H__

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#define __CHAN_USER_H__

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#include "init.h"

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struct chan_opts {

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	void (*const announce)(char *dev_name, int dev);

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	char *xterm_title;

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	const int raw;

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};

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enum chan_init_pri { INIT_STATIC, INIT_ALL, INIT_ONE };

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struct chan_ops {

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	char *type;

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	void *(*init)(char *, int, const struct chan_opts *);

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	int (*open)(int, int, int, void *, char **);

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	void (*close)(int, void *);

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	int (*read)(int, char *, void *);

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	int (*write)(int, const char *, int, void *);

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	int (*console_write)(int, const char *, int);

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	int (*window_size)(int, void *, unsigned short *, unsigned short *);

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	void (*free)(void *);

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	int winch;

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};

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extern const struct chan_ops fd_ops, null_ops, port_ops, pts_ops, pty_ops,

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	tty_ops, xterm_ops;

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extern void generic_close(int fd, void *unused);

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extern int generic_read(int fd, char *c_out, void *unused);

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extern int generic_write(int fd, const char *buf, int n, void *unused);

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extern int generic_console_write(int fd, const char *buf, int n);

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extern int generic_window_size(int fd, void *unused, unsigned short *rows_out,

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			       unsigned short *cols_out);

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extern void generic_free(void *data);

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struct tty_struct;

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extern void register_winch(int fd,  struct tty_struct *tty);

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extern void register_winch_irq(int fd, int tty_fd, int pid,

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			       struct tty_struct *tty, unsigned long stack);

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#define __channel_help(fn, prefix) \

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__uml_help(fn, prefix "[0-9]*=<channel description>\n" \

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"    Attach a console or serial line to a host channel.  See\n" \

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"    http://user-mode-linux.sourceforge.net/old/input.html for a complete\n" \

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"    description of this switch.\n\n" \

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);

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#endif

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