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 19 /* 20 * Presently, a lot of graphics programs do not restore the contents of 21 * the higher font pages. Defining this flag will avoid use of them, but 22 * will lose support for PIO_FONTRESET. Note that many font operations are 23 * not likely to work with these programs anyway; they need to be 24 * fixed. The linux/Documentation directory includes a code snippet 25 * to save and restore the text font. 26 */ 27 #ifdef CONFIG_VGA_CONSOLE 28 #define BROKEN_GRAPHICS_PROGRAMS 1 29 #endif 30 31 extern void kd_mksound(unsigned int hz, unsigned int ticks); 32 extern int kbd_rate(struct kbd_repeat *rep); 33 extern int fg_console, last_console, want_console; 34 35 /* console.c */ 36 37 int vc_allocate(unsigned int console); 38 int vc_cons_allocated(unsigned int console); 39 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines); 40 struct vc_data *vc_deallocate(unsigned int console); 41 void reset_palette(struct vc_data *vc); 42 void do_blank_screen(int entering_gfx); 43 void do_unblank_screen(int leaving_gfx); 44 void unblank_screen(void); 45 void poke_blanked_console(void); 46 int con_font_op(struct vc_data *vc, struct console_font_op *op); 47 int con_set_cmap(unsigned char __user *cmap); 48 int con_get_cmap(unsigned char __user *cmap); 49 void scrollback(struct vc_data *vc); 50 void scrollfront(struct vc_data *vc, int lines); 51 void clear_buffer_attributes(struct vc_data *vc); 52 void update_region(struct vc_data *vc, unsigned long start, int count); 53 void redraw_screen(struct vc_data *vc, int is_switch); 54 #define update_screen(x) redraw_screen(x, 0) 55 #define switch_screen(x) redraw_screen(x, 1) 56 57 struct tty_struct; 58 int tioclinux(struct tty_struct *tty, unsigned long arg); 59 60 #ifdef CONFIG_CONSOLE_TRANSLATIONS 61 /* consolemap.c */ 62 63 struct unipair; 64 65 int con_set_trans_old(unsigned char __user * table); 66 int con_get_trans_old(unsigned char __user * table); 67 int con_set_trans_new(unsigned short __user * table); 68 int con_get_trans_new(unsigned short __user * table); 69 int con_clear_unimap(struct vc_data *vc); 70 int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list); 71 int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list); 72 int con_set_default_unimap(struct vc_data *vc); 73 void con_free_unimap(struct vc_data *vc); 74 int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc); 75 76 #define vc_translate(vc, c) ((vc)->vc_translate[(c) | \ 77 ((vc)->vc_toggle_meta ? 0x80 : 0)]) 78 #else 79 static inline int con_set_trans_old(unsigned char __user *table) 80 { 81 return 0; 82 } 83 static inline int con_get_trans_old(unsigned char __user *table) 84 { 85 return -EINVAL; 86 } 87 static inline int con_set_trans_new(unsigned short __user *table) 88 { 89 return 0; 90 } 91 static inline int con_get_trans_new(unsigned short __user *table) 92 { 93 return -EINVAL; 94 } 95 static inline int con_clear_unimap(struct vc_data *vc) 96 { 97 return 0; 98 } 99 static inline 100 int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list) 101 { 102 return 0; 103 } 104 static inline 105 int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, 106 struct unipair __user *list) 107 { 108 return -EINVAL; 109 } 110 static inline int con_set_default_unimap(struct vc_data *vc) 111 { 112 return 0; 113 } 114 static inline void con_free_unimap(struct vc_data *vc) 115 { 116 } 117 static inline void con_protect_unimap(struct vc_data *vc, int rdonly) 118 { 119 } 120 static inline 121 int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc) 122 { 123 return 0; 124 } 125 126 #define vc_translate(vc, c) (c) 127 #endif 128 129 /* vt.c */ 130 void vt_event_post(unsigned int event, unsigned int old, unsigned int new); 131 int vt_waitactive(int n); 132 void change_console(struct vc_data *new_vc); 133 void reset_vc(struct vc_data *vc); 134 extern int do_unbind_con_driver(const struct consw *csw, int first, int last, 135 int deflt); 136 int vty_init(const struct file_operations *console_fops); 137 138 static inline bool vt_force_oops_output(struct vc_data *vc) 139 { 140 if (oops_in_progress && vc->vc_panic_force_write && panic_timeout >= 0) 141 return true; 142 return false; 143 } 144 145 extern char vt_dont_switch; 146 extern int default_utf8; 147 extern int global_cursor_default; 148 149 struct vt_spawn_console { 150 spinlock_t lock; 151 struct pid *pid; 152 int sig; 153 }; 154 extern struct vt_spawn_console vt_spawn_con; 155 156 extern int vt_move_to_console(unsigned int vt, int alloc); 157 158 /* Interfaces for VC notification of character events (for accessibility etc) */ 159 160 struct vt_notifier_param { 161 struct vc_data *vc; /* VC on which the update happened */ 162 unsigned int c; /* Printed char */ 163 }; 164 165 extern int register_vt_notifier(struct notifier_block *nb); 166 extern int unregister_vt_notifier(struct notifier_block *nb); 167 168 extern void hide_boot_cursor(bool hide); 169 170 /* keyboard provided interfaces */ 171 extern int vt_do_diacrit(unsigned int cmd, void __user *up, int eperm); 172 extern int vt_do_kdskbmode(int console, unsigned int arg); 173 extern int vt_do_kdskbmeta(int console, unsigned int arg); 174 extern int vt_do_kbkeycode_ioctl(int cmd, struct kbkeycode __user *user_kbkc, 175 int perm); 176 extern int vt_do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe, 177 int perm, int console); 178 extern int vt_do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, 179 int perm); 180 extern int vt_do_kdskled(int console, int cmd, unsigned long arg, int perm); 181 extern int vt_do_kdgkbmode(int console); 182 extern int vt_do_kdgkbmeta(int console); 183 extern void vt_reset_unicode(int console); 184 extern int vt_get_shift_state(void); 185 extern void vt_reset_keyboard(int console); 186 extern int vt_get_leds(int console, int flag); 187 extern int vt_get_kbd_mode_bit(int console, int bit); 188 extern void vt_set_kbd_mode_bit(int console, int bit); 189 extern void vt_clr_kbd_mode_bit(int console, int bit); 190 extern void vt_set_led_state(int console, int leds); 191 extern void vt_set_led_state(int console, int leds); 192 extern void vt_kbd_con_start(int console); 193 extern void vt_kbd_con_stop(int console); 194 195 void vc_scrolldelta_helper(struct vc_data *c, int lines, 196 unsigned int rolled_over, void *_base, unsigned int size); 197 198 #endif /* _VT_KERN_H */ 199