1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com) 4 */ 5 6 #ifndef __CHAN_KERN_H__ 7 #define __CHAN_KERN_H__ 8 9 #include <linux/tty.h> 10 #include <linux/list.h> 11 #include <linux/console.h> 12 #include "chan_user.h" 13 #include "line.h" 14 15 struct chan { 16 struct list_head list; 17 struct list_head free_list; 18 struct line *line; 19 char *dev; 20 unsigned int primary:1; 21 unsigned int input:1; 22 unsigned int output:1; 23 unsigned int opened:1; 24 unsigned int enabled:1; 25 int fd_in; 26 int fd_out; /* only different to fd_in if blocking output is needed */ 27 const struct chan_ops *ops; 28 void *data; 29 }; 30 31 extern void chan_interrupt(struct line *line, int irq); 32 extern int parse_chan_pair(char *str, struct line *line, int device, 33 const struct chan_opts *opts, char **error_out); 34 extern int write_chan(struct chan *chan, const u8 *buf, size_t len, 35 int write_irq); 36 extern int console_write_chan(struct chan *chan, const char *buf, 37 int len); 38 extern int console_open_chan(struct line *line, struct console *co); 39 extern void deactivate_chan(struct chan *chan, int irq); 40 extern void chan_enable_winch(struct chan *chan, struct tty_port *port); 41 extern int enable_chan(struct line *line); 42 extern void close_chan(struct line *line); 43 extern int chan_window_size(struct line *line, 44 unsigned short *rows_out, 45 unsigned short *cols_out); 46 extern int chan_config_string(struct line *line, char *str, int size, 47 char **error_out); 48 49 #endif 50