1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* |
3 | * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) |
4 | */ |
5 | |
6 | #ifndef __LINE_H__ |
7 | #define __LINE_H__ |
8 | |
9 | #include <linux/list.h> |
10 | #include <linux/workqueue.h> |
11 | #include <linux/tty.h> |
12 | #include <linux/interrupt.h> |
13 | #include <linux/spinlock.h> |
14 | #include <linux/mutex.h> |
15 | #include "chan_user.h" |
16 | #include "mconsole_kern.h" |
17 | |
18 | /* There's only two modifiable fields in this - .mc.list and .driver */ |
19 | struct line_driver { |
20 | const char *name; |
21 | const char *device_name; |
22 | const short major; |
23 | const short minor_start; |
24 | const short type; |
25 | const short subtype; |
26 | const char *read_irq_name; |
27 | const char *write_irq_name; |
28 | struct mc_device mc; |
29 | struct tty_driver *driver; |
30 | }; |
31 | |
32 | struct line { |
33 | struct tty_port port; |
34 | int valid; |
35 | |
36 | int read_irq, write_irq; |
37 | |
38 | char *init_str; |
39 | struct list_head chan_list; |
40 | struct chan *chan_in, *chan_out; |
41 | |
42 | /*This lock is actually, mostly, local to*/ |
43 | spinlock_t lock; |
44 | int throttled; |
45 | /* Yes, this is a real circular buffer. |
46 | * XXX: And this should become a struct kfifo! |
47 | * |
48 | * buffer points to a buffer allocated on demand, of length |
49 | * LINE_BUFSIZE, head to the start of the ring, tail to the end.*/ |
50 | u8 *buffer; |
51 | u8 *head; |
52 | u8 *tail; |
53 | |
54 | int sigio; |
55 | struct delayed_work task; |
56 | const struct line_driver *driver; |
57 | }; |
58 | |
59 | extern void line_close(struct tty_struct *tty, struct file * filp); |
60 | extern int line_open(struct tty_struct *tty, struct file *filp); |
61 | extern int line_install(struct tty_driver *driver, struct tty_struct *tty, |
62 | struct line *line); |
63 | extern void line_cleanup(struct tty_struct *tty); |
64 | extern void line_hangup(struct tty_struct *tty); |
65 | extern int line_setup(char **conf, unsigned nlines, char **def, |
66 | char *init, char *name); |
67 | extern ssize_t line_write(struct tty_struct *tty, const u8 *buf, size_t len); |
68 | extern unsigned int line_chars_in_buffer(struct tty_struct *tty); |
69 | extern void line_flush_buffer(struct tty_struct *tty); |
70 | extern void line_flush_chars(struct tty_struct *tty); |
71 | extern unsigned int line_write_room(struct tty_struct *tty); |
72 | extern void line_throttle(struct tty_struct *tty); |
73 | extern void line_unthrottle(struct tty_struct *tty); |
74 | |
75 | extern char *add_xterm_umid(char *base); |
76 | extern int line_setup_irq(int fd, int input, int output, struct line *line, |
77 | void *data); |
78 | extern void line_close_chan(struct line *line); |
79 | extern int register_lines(struct line_driver *line_driver, |
80 | const struct tty_operations *driver, |
81 | struct line *lines, int nlines); |
82 | extern int setup_one_line(struct line *lines, int n, char *init, |
83 | const struct chan_opts *opts, char **error_out); |
84 | extern void close_lines(struct line *lines, int nlines); |
85 | |
86 | extern int line_config(struct line *lines, unsigned int sizeof_lines, |
87 | char *str, const struct chan_opts *opts, |
88 | char **error_out); |
89 | extern int line_id(char **str, int *start_out, int *end_out); |
90 | extern int line_remove(struct line *lines, unsigned int sizeof_lines, int n, |
91 | char **error_out); |
92 | extern int line_get_config(char *dev, struct line *lines, |
93 | unsigned int sizeof_lines, char *str, |
94 | int size, char **error_out); |
95 | |
96 | #endif |
97 | |