vt_kern.h

  1/* SPDX-License-Identifier: GPL-2.0 */
  2#ifndef _VT_KERN_H
  3#define _VT_KERN_H
  4
  5/*
  6 * this really is an extension of the vc_cons structure in console.c, but
  7 * with information needed by the vt package
  8 */
  9
 10#include <linux/vt.h>
 11#include <linux/kd.h>
 12#include <linux/tty.h>
 13#include <linux/mutex.h>
 14#include <linux/console_struct.h>
 15#include <linux/mm.h>
 16#include <linux/consolemap.h>
 17#include <linux/notifier.h>
 18
 19void kd_mksound(unsigned int hz, unsigned int ticks);
 20int kbd_rate(struct kbd_repeat *rep);
 21
 22extern int fg_console, last_console, want_console;
 23
 24/* console.c */
 25
 26int vc_allocate(unsigned int console);
 27int vc_cons_allocated(unsigned int console);
 28int __vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines,
 29		bool from_user);
 30struct vc_data *vc_deallocate(unsigned int console);
 31void reset_palette(struct vc_data *vc);
 32void do_blank_screen(int entering_gfx);
 33void do_unblank_screen(int leaving_gfx);
 34void poke_blanked_console(void);
 35int con_font_op(struct vc_data *vc, struct console_font_op *op);
 36int con_set_cmap(unsigned char __user *cmap);
 37int con_get_cmap(unsigned char __user *cmap);
 38void scrollback(struct vc_data *vc);
 39void scrollfront(struct vc_data *vc, int lines);
 40void clear_buffer_attributes(struct vc_data *vc);
 41void update_region(struct vc_data *vc, unsigned long start, int count);
 42void redraw_screen(struct vc_data *vc, int is_switch);
 43#define update_screen(x) redraw_screen(x, 0)
 44#define switch_screen(x) redraw_screen(x, 1)
 45
 46static inline int vc_resize(struct vc_data *vc, unsigned int cols,
 47			    unsigned int lines)
 48{
 49	return __vc_resize(vc, cols, lines, false);
 50}
 51
 52struct tty_struct;
 53int tioclinux(struct tty_struct *tty, unsigned long arg);
 54
 55#ifdef CONFIG_CONSOLE_TRANSLATIONS
 56/* consolemap.c */
 57
 58struct unipair;
 59
 60int con_set_trans_old(unsigned char __user * table);
 61int con_get_trans_old(unsigned char __user * table);
 62int con_set_trans_new(unsigned short __user * table);
 63int con_get_trans_new(unsigned short __user * table);
 64int con_clear_unimap(struct vc_data *vc);
 65int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list);
 66int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list);
 67int con_set_default_unimap(struct vc_data *vc);
 68void con_free_unimap(struct vc_data *vc);
 69int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc);
 70
 71#else
 72static inline int con_set_trans_old(unsigned char __user *table)
 73{
 74	return 0;
 75}
 76static inline int con_get_trans_old(unsigned char __user *table)
 77{
 78	return -EINVAL;
 79}
 80static inline int con_set_trans_new(unsigned short __user *table)
 81{
 82	return 0;
 83}
 84static inline int con_get_trans_new(unsigned short __user *table)
 85{
 86	return -EINVAL;
 87}
 88static inline int con_clear_unimap(struct vc_data *vc)
 89{
 90	return 0;
 91}
 92static inline
 93int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
 94{
 95	return 0;
 96}
 97static inline
 98int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct,
 99		   struct unipair __user *list)
100{
101	return -EINVAL;
102}
103static inline int con_set_default_unimap(struct vc_data *vc)
104{
105	return 0;
106}
107static inline void con_free_unimap(struct vc_data *vc)
108{
109}
110static inline void con_protect_unimap(struct vc_data *vc, int rdonly)
111{
112}
113static inline
114int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc)
115{
116	return 0;
117}
118
119#endif
120
121/* vt.c */
122void vt_event_post(unsigned int event, unsigned int old, unsigned int new);
123int vt_waitactive(int n);
124void change_console(struct vc_data *new_vc);
125void reset_vc(struct vc_data *vc);
126int do_unbind_con_driver(const struct consw *csw, int first, int last,
127			 int deflt);
128int vty_init(const struct file_operations *console_fops);
129
130extern bool vt_dont_switch;
131extern int default_utf8;
132extern int global_cursor_default;
133
134struct vt_spawn_console {
135	spinlock_t lock;
136	struct pid *pid;
137	int sig;
138};
139extern struct vt_spawn_console vt_spawn_con;
140
141int vt_move_to_console(unsigned int vt, int alloc);
142
143/* Interfaces for VC notification of character events (for accessibility etc) */
144
145struct vt_notifier_param {
146	struct vc_data *vc;	/* VC on which the update happened */
147	unsigned int c;		/* Printed char */
148};
149
150int register_vt_notifier(struct notifier_block *nb);
151int unregister_vt_notifier(struct notifier_block *nb);
152
153void hide_boot_cursor(bool hide);
154
155/* keyboard  provided interfaces */
156int vt_do_diacrit(unsigned int cmd, void __user *up, int eperm);
157int vt_do_kdskbmode(unsigned int console, unsigned int arg);
158int vt_do_kdskbmeta(unsigned int console, unsigned int arg);
159int vt_do_kbkeycode_ioctl(int cmd, struct kbkeycode __user *user_kbkc,
160			  int perm);
161int vt_do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe, int perm,
162		     unsigned int console);
163int vt_do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, int perm);
164int vt_do_kdskled(unsigned int console, int cmd, unsigned long arg, int perm);
165int vt_do_kdgkbmode(unsigned int console);
166int vt_do_kdgkbmeta(unsigned int console);
167void vt_reset_unicode(unsigned int console);
168int vt_get_shift_state(void);
169void vt_reset_keyboard(unsigned int console);
170int vt_get_leds(unsigned int console, int flag);
171int vt_get_kbd_mode_bit(unsigned int console, int bit);
172void vt_set_kbd_mode_bit(unsigned int console, int bit);
173void vt_clr_kbd_mode_bit(unsigned int console, int bit);
174void vt_set_led_state(unsigned int console, int leds);
175void vt_kbd_con_start(unsigned int console);
176void vt_kbd_con_stop(unsigned int console);
177
178#endif /* _VT_KERN_H */