/* SPDX-License-Identifier: GPL-2.0 */
/* 
 * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
 */

#ifndef __CHAN_KERN_H__
#define __CHAN_KERN_H__

#include <linux/tty.h>
#include <linux/list.h>
#include <linux/console.h>
#include "chan_user.h"
#include "line.h"

struct chan {
        struct list_head list;
        struct list_head free_list;
        struct line *line;
        char *dev;
        unsigned int primary:1;
        unsigned int input:1;
        unsigned int output:1;
        unsigned int opened:1;
        unsigned int enabled:1;
        int fd_in;
        int fd_out; /* only different to fd_in if blocking output is needed */
        const struct chan_ops *ops;
        void *data;
};

extern void chan_interrupt(struct line *line, int irq);
extern int parse_chan_pair(char *str, struct line *line, int device,
                           const struct chan_opts *opts, char **error_out);
extern int write_chan(struct chan *chan, const u8 *buf, size_t len,
                             int write_irq);
extern int console_write_chan(struct chan *chan, const char *buf, 
                              int len);
extern int console_open_chan(struct line *line, struct console *co);
extern void deactivate_chan(struct chan *chan, int irq);
extern void chan_enable_winch(struct chan *chan, struct tty_port *port);
extern int enable_chan(struct line *line);
extern void close_chan(struct line *line);
extern int chan_window_size(struct line *line, 
                             unsigned short *rows_out, 
                             unsigned short *cols_out);
extern int chan_config_string(struct line *line, char *str, int size,
                              char **error_out);

#endif