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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/um/drivers/chan.h
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/* SPDX-License-Identifier: GPL-2.0 */

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/* 

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

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 */

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#ifndef __CHAN_KERN_H__

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#define __CHAN_KERN_H__

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#include <linux/tty.h>

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#include <linux/list.h>

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#include <linux/console.h>

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#include "chan_user.h"

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#include "line.h"

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struct chan {

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	struct list_head list;

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	struct list_head free_list;

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	struct line *line;

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	char *dev;

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	unsigned int primary:1;

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	unsigned int input:1;

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	unsigned int output:1;

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	unsigned int opened:1;

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	unsigned int enabled:1;

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	int fd_in;

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	int fd_out; /* only different to fd_in if blocking output is needed */

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	const struct chan_ops *ops;

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	void *data;

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};

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extern void chan_interrupt(struct line *line, int irq);

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extern int parse_chan_pair(char *str, struct line *line, int device,

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			   const struct chan_opts *opts, char **error_out);

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extern int write_chan(struct chan *chan, const u8 *buf, size_t len,

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			     int write_irq);

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extern int console_write_chan(struct chan *chan, const char *buf, 

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			      int len);

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extern int console_open_chan(struct line *line, struct console *co);

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extern void deactivate_chan(struct chan *chan, int irq);

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extern void chan_enable_winch(struct chan *chan, struct tty_port *port);

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extern int enable_chan(struct line *line);

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extern void close_chan(struct line *line);

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extern int chan_window_size(struct line *line, 

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			     unsigned short *rows_out, 

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			     unsigned short *cols_out);

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extern int chan_config_string(struct line *line, char *str, int size,

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			      char **error_out);

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#endif

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