arch/um/drivers/chan_user.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
   4  */
   5
   6 #ifndef __CHAN_USER_H__
   7 #define __CHAN_USER_H__
   8
   9 #include <init.h>
  10
  11 struct chan_opts {
  12         void (*const announce)(char *dev_name, int dev);
  13         char *xterm_title;
  14         int raw;
  15 };
  16
  17 struct chan_ops {
  18         char *type;
  19         void *(*init)(char *, int, const struct chan_opts *);
  20         int (*open)(int, int, int, void *, char **);
  21         void (*close)(int, void *);
  22         int (*read)(int, char *, void *);
  23         int (*write)(int, const char *, int, void *);
  24         int (*console_write)(int, const char *, int);
  25         int (*window_size)(int, void *, unsigned short *, unsigned short *);
  26         void (*free)(void *);
  27         int winch;
  28 };
  29
  30 extern const struct chan_ops fd_ops, null_ops, port_ops, pts_ops, pty_ops,
  31         tty_ops, xterm_ops;
  32
  33 extern void generic_close(int fd, void *unused);
  34 extern int generic_read(int fd, char *c_out, void *unused);
  35 extern int generic_write(int fd, const char *buf, int n, void *unused);
  36 extern int generic_console_write(int fd, const char *buf, int n);
  37 extern int generic_window_size(int fd, void *unused, unsigned short *rows_out,
  38                                unsigned short *cols_out);
  39 extern void generic_free(void *data);
  40
  41 struct tty_port;
  42 extern void register_winch(int fd,  struct tty_port *port);
  43 extern void register_winch_irq(int fd, int tty_fd, int pid,
  44                                struct tty_port *port, unsigned long stack);
  45
  46 #define __channel_help(fn, prefix) \
  47 __uml_help(fn, prefix "[0-9]*=<channel description>\n" \
  48 "    Attach a console or serial line to a host channel.  See\n" \
  49 "    http://user-mode-linux.sourceforge.net/old/input.html for a complete\n" \
  50 "    description of this switch.\n\n" \
  51 );
  52
  53 #endif