xref: /freebsd/sys/dev/vt/vt.h (revision a0e793cbf1951d07fc47a0d9ea389d7dacba5213)
1 /*-
2  * Copyright (c) 2009, 2013 The FreeBSD Foundation
3  * All rights reserved.
4  *
5  * This software was developed by Ed Schouten under sponsorship from the
6  * FreeBSD Foundation.
7  *
8  * Portions of this software were developed by Oleksandr Rybalko
9  * under sponsorship from the FreeBSD Foundation.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  *    notice, this list of conditions and the following disclaimer.
16  * 2. Redistributions in binary form must reproduce the above copyright
17  *    notice, this list of conditions and the following disclaimer in the
18  *    documentation and/or other materials provided with the distribution.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30  * SUCH DAMAGE.
31  *
32  * $FreeBSD$
33  */
34 
35 #ifndef _DEV_VT_VT_H_
36 #define	_DEV_VT_VT_H_
37 
38 #include <sys/param.h>
39 #include <sys/_lock.h>
40 #include <sys/_mutex.h>
41 #include <sys/callout.h>
42 #include <sys/condvar.h>
43 #include <sys/conf.h>
44 #include <sys/consio.h>
45 #include <sys/kbio.h>
46 #include <sys/mouse.h>
47 #include <sys/terminal.h>
48 #include <sys/sysctl.h>
49 
50 #include "opt_syscons.h"
51 #include "opt_splash.h"
52 
53 #ifndef	VT_MAXWINDOWS
54 #ifdef	MAXCONS
55 #define	VT_MAXWINDOWS	MAXCONS
56 #else
57 #define	VT_MAXWINDOWS	12
58 #endif
59 #endif
60 
61 #ifndef VT_ALT_TO_ESC_HACK
62 #define	VT_ALT_TO_ESC_HACK	1
63 #endif
64 
65 #define	VT_CONSWINDOW	0
66 
67 #if defined(SC_TWOBUTTON_MOUSE) || defined(VT_TWOBUTTON_MOUSE)
68 #define VT_MOUSE_PASTEBUTTON	MOUSE_BUTTON3DOWN	/* right button */
69 #define VT_MOUSE_EXTENDBUTTON	MOUSE_BUTTON2DOWN	/* not really used */
70 #else
71 #define VT_MOUSE_PASTEBUTTON	MOUSE_BUTTON2DOWN	/* middle button */
72 #define VT_MOUSE_EXTENDBUTTON	MOUSE_BUTTON3DOWN	/* right button */
73 #endif /* defined(SC_TWOBUTTON_MOUSE) || defined(VT_TWOBUTTON_MOUSE) */
74 
75 #define	SC_DRIVER_NAME	"vt"
76 #ifdef VT_DEBUG
77 #define	DPRINTF(_l, ...)	if (vt_debug > (_l)) printf( __VA_ARGS__ )
78 #define VT_CONSOLECTL_DEBUG
79 #define VT_SYSMOUSE_DEBUG
80 #else
81 #define	DPRINTF(_l, ...)	do {} while (0)
82 #endif
83 #define	ISSIGVALID(sig)	((sig) > 0 && (sig) < NSIG)
84 
85 #define	VT_SYSCTL_INT(_name, _default, _descr)				\
86 static int vt_##_name = _default;					\
87 SYSCTL_INT(_kern_vt, OID_AUTO, _name, CTLFLAG_RWTUN, &vt_##_name, _default,\
88 		_descr);
89 
90 /* Allow to disable some special keys by users. */
91 #define	VT_DEBUG_KEY_ENABLED	(1 << 0)
92 #define	VT_REBOOT_KEY_ENABLED	(1 << 1)
93 #define	VT_HALT_KEY_ENABLED	(1 << 2)
94 #define	VT_POWEROFF_KEY_ENABLED	(1 << 3)
95 
96 struct vt_driver;
97 
98 void vt_allocate(struct vt_driver *, void *);
99 void vt_resume(void);
100 void vt_suspend(void);
101 
102 typedef unsigned int 	vt_axis_t;
103 
104 /*
105  * List of locks
106  * (d)	locked by vd_lock
107  * (b)	locked by vb_lock
108  * (G)	locked by Giant
109  * (u)	unlocked, locked by higher levels
110  * (c)	const until freeing
111  * (?)	yet to be determined
112  */
113 
114 /*
115  * Per-device datastructure.
116  */
117 
118 struct vt_device {
119 	struct vt_window	*vd_windows[VT_MAXWINDOWS]; /* (c) Windows. */
120 	struct vt_window	*vd_curwindow;	/* (d) Current window. */
121 	struct vt_window	*vd_savedwindow;/* (?) Saved for suspend. */
122 	struct vt_window	*vd_markedwin;	/* (?) Copy/paste buf owner. */
123 	const struct vt_driver	*vd_driver;	/* (c) Graphics driver. */
124 	void			*vd_softc;	/* (u) Driver data. */
125 	uint16_t		 vd_mx;		/* (?) Mouse X. */
126 	uint16_t		 vd_my;		/* (?) Mouse Y. */
127 	vt_axis_t		 vd_mdirtyx;	/* (?) Screen width. */
128 	vt_axis_t		 vd_mdirtyy;	/* (?) Screen height. */
129 	uint32_t		 vd_mstate;	/* (?) Mouse state. */
130 	term_pos_t		 vd_offset;	/* (?) Pixel offset. */
131 	vt_axis_t		 vd_width;	/* (?) Screen width. */
132 	vt_axis_t		 vd_height;	/* (?) Screen height. */
133 	struct mtx		 vd_lock;	/* Per-device lock. */
134 	struct cv		 vd_winswitch;	/* (d) Window switch notify. */
135 	struct callout		 vd_timer;	/* (d) Display timer. */
136 	int			 vd_flags;	/* (d) Device flags. */
137 #define	VDF_TEXTMODE	0x01	/* Do text mode rendering. */
138 #define	VDF_SPLASH	0x02	/* Splash screen active. */
139 #define	VDF_ASYNC	0x04	/* vt_timer() running. */
140 #define	VDF_INVALID	0x08	/* Entire screen should be re-rendered. */
141 #define	VDF_DEAD	0x10	/* Early probing found nothing. */
142 #define	VDF_INITIALIZED	0x20	/* vtterm_cnprobe already done. */
143 #define	VDF_MOUSECURSOR	0x40	/* Mouse cursor visible. */
144 #define	VDF_QUIET_BELL	0x80	/* Disable bell. */
145 	int			 vd_keyboard;	/* (G) Keyboard index. */
146 	unsigned int		 vd_kbstate;	/* (?) Device unit. */
147 	unsigned int		 vd_unit;	/* (c) Device unit. */
148 };
149 
150 /*
151  * Per-window terminal screen buffer.
152  *
153  * Because redrawing is performed asynchronously, the buffer keeps track
154  * of a rectangle that needs to be redrawn (vb_dirtyrect).  Because this
155  * approach seemed to cause suboptimal performance (when the top left
156  * and the bottom right of the screen are modified), it also uses a set
157  * of bitmasks to keep track of the rows and columns (mod 64) that have
158  * been modified.
159  */
160 
161 struct vt_bufmask {
162 	uint64_t		 vbm_row, vbm_col;
163 #define	VBM_DIRTY		UINT64_MAX
164 };
165 
166 struct vt_buf {
167 	struct mtx		 vb_lock;	/* Buffer lock. */
168 	term_pos_t		 vb_scr_size;	/* (b) Screen dimensions. */
169 	int			 vb_flags;	/* (b) Flags. */
170 #define	VBF_CURSOR	0x1	/* Cursor visible. */
171 #define	VBF_STATIC	0x2	/* Buffer is statically allocated. */
172 #define	VBF_MTX_INIT	0x4	/* Mutex initialized. */
173 #define	VBF_SCROLL	0x8	/* scroll locked mode. */
174 #define	VBF_HISTORY_FULL 0x10	/* All rows filled. */
175 	int			 vb_history_size;
176 #define	VBF_DEFAULT_HISTORY_SIZE	500
177 	int			 vb_roffset;	/* (b) History rows offset. */
178 	int			 vb_curroffset;	/* (b) Saved rows offset. */
179 	term_pos_t		 vb_cursor;	/* (u) Cursor position. */
180 	term_pos_t		 vb_mark_start;	/* (b) Copy region start. */
181 	term_pos_t		 vb_mark_end;	/* (b) Copy region end. */
182 	int			 vb_mark_last;	/* Last mouse event. */
183 	term_rect_t		 vb_dirtyrect;	/* (b) Dirty rectangle. */
184 	struct vt_bufmask	 vb_dirtymask;	/* (b) Dirty bitmasks. */
185 	term_char_t		*vb_buffer;	/* (u) Data buffer. */
186 	term_char_t		**vb_rows;	/* (u) Array of rows */
187 };
188 
189 void vtbuf_copy(struct vt_buf *, const term_rect_t *, const term_pos_t *);
190 void vtbuf_fill_locked(struct vt_buf *, const term_rect_t *, term_char_t);
191 void vtbuf_init_early(struct vt_buf *);
192 void vtbuf_init(struct vt_buf *, const term_pos_t *);
193 void vtbuf_grow(struct vt_buf *, const term_pos_t *, int);
194 void vtbuf_putchar(struct vt_buf *, const term_pos_t *, term_char_t);
195 void vtbuf_cursor_position(struct vt_buf *, const term_pos_t *);
196 void vtbuf_scroll_mode(struct vt_buf *vb, int yes);
197 void vtbuf_undirty(struct vt_buf *, term_rect_t *, struct vt_bufmask *);
198 void vtbuf_sethistory_size(struct vt_buf *, int);
199 int vtbuf_iscursor(struct vt_buf *vb, int row, int col);
200 void vtbuf_cursor_visibility(struct vt_buf *, int);
201 #ifndef SC_NO_CUTPASTE
202 void vtbuf_mouse_cursor_position(struct vt_buf *vb, int col, int row);
203 int vtbuf_set_mark(struct vt_buf *vb, int type, int col, int row);
204 int vtbuf_get_marked_len(struct vt_buf *vb);
205 void vtbuf_extract_marked(struct vt_buf *vb, term_char_t *buf, int sz);
206 #endif
207 
208 #define	VTB_MARK_NONE		0
209 #define	VTB_MARK_END		1
210 #define	VTB_MARK_START		2
211 #define	VTB_MARK_WORD		3
212 #define	VTB_MARK_ROW		4
213 #define	VTB_MARK_EXTEND		5
214 #define	VTB_MARK_MOVE		6
215 
216 #define	VTBUF_SLCK_ENABLE(vb)	vtbuf_scroll_mode((vb), 1)
217 #define	VTBUF_SLCK_DISABLE(vb)	vtbuf_scroll_mode((vb), 0)
218 
219 #define	VTBUF_MAX_HEIGHT(vb) \
220 	((vb)->vb_history_size)
221 #define	VTBUF_GET_ROW(vb, r) \
222 	((vb)->vb_rows[((vb)->vb_roffset + (r)) % VTBUF_MAX_HEIGHT(vb)])
223 #define	VTBUF_GET_FIELD(vb, r, c) \
224 	((vb)->vb_rows[((vb)->vb_roffset + (r)) % VTBUF_MAX_HEIGHT(vb)][(c)])
225 #define	VTBUF_FIELD(vb, r, c) \
226 	((vb)->vb_rows[((vb)->vb_curroffset + (r)) % VTBUF_MAX_HEIGHT(vb)][(c)])
227 #define	VTBUF_ISCURSOR(vb, r, c) \
228 	vtbuf_iscursor((vb), (r), (c))
229 #define	VTBUF_DIRTYROW(mask, row) \
230 	((mask)->vbm_row & ((uint64_t)1 << ((row) % 64)))
231 #define	VTBUF_DIRTYCOL(mask, col) \
232 	((mask)->vbm_col & ((uint64_t)1 << ((col) % 64)))
233 #define	VTBUF_SPACE_CHAR(attr)	(' ' | (attr))
234 
235 #define	VHS_SET	0
236 #define	VHS_CUR	1
237 #define	VHS_END	2
238 int vthistory_seek(struct vt_buf *, int offset, int whence);
239 void vthistory_addlines(struct vt_buf *vb, int offset);
240 void vthistory_getpos(const struct vt_buf *, unsigned int *offset);
241 
242 /*
243  * Per-window datastructure.
244  */
245 
246 struct vt_window {
247 	struct vt_device	*vw_device;	/* (c) Device. */
248 	struct terminal		*vw_terminal;	/* (c) Terminal. */
249 	struct vt_buf		 vw_buf;	/* (u) Screen buffer. */
250 	struct vt_font		*vw_font;	/* (d) Graphical font. */
251 	unsigned int		 vw_number;	/* (c) Window number. */
252 	int			 vw_kbdmode;	/* (?) Keyboard mode. */
253 	char			*vw_kbdsq;	/* Escape sequence queue*/
254 	unsigned int		 vw_flags;	/* (d) Per-window flags. */
255 	int			 vw_mouse_level;/* Mouse op mode. */
256 #define	VWF_BUSY	0x1	/* Busy reconfiguring device. */
257 #define	VWF_OPENED	0x2	/* TTY in use. */
258 #define	VWF_SCROLL	0x4	/* Keys influence scrollback. */
259 #define	VWF_CONSOLE	0x8	/* Kernel message console window. */
260 #define	VWF_VTYLOCK	0x10	/* Prevent window switch. */
261 #define	VWF_MOUSE_HIDE	0x20	/* Disable mouse events processing. */
262 #define	VWF_READY	0x40	/* Window fully initialized. */
263 #define	VWF_SWWAIT_REL	0x10000	/* Program wait for VT acquire is done. */
264 #define	VWF_SWWAIT_ACQ	0x20000	/* Program wait for VT release is done. */
265 	pid_t			 vw_pid;	/* Terminal holding process */
266 	struct proc		*vw_proc;
267 	struct vt_mode		 vw_smode;	/* switch mode */
268 	struct callout		 vw_proc_dead_timer;
269 	struct vt_window	*vw_switch_to;
270 };
271 
272 #define	VT_AUTO		0		/* switching is automatic */
273 #define	VT_PROCESS	1		/* switching controlled by prog */
274 #define	VT_KERNEL	255		/* switching controlled in kernel */
275 
276 #define	IS_VT_PROC_MODE(vw)	((vw)->vw_smode.mode == VT_PROCESS)
277 
278 /*
279  * Per-device driver routines.
280  *
281  * vd_bitbltchr is used when the driver operates in graphics mode, while
282  * vd_putchar is used when the driver operates in text mode
283  * (VDF_TEXTMODE).
284  */
285 
286 typedef int vd_init_t(struct vt_device *vd);
287 typedef int vd_probe_t(struct vt_device *vd);
288 typedef void vd_postswitch_t(struct vt_device *vd);
289 typedef void vd_blank_t(struct vt_device *vd, term_color_t color);
290 typedef void vd_bitbltchr_t(struct vt_device *vd, const uint8_t *src,
291     const uint8_t *mask, int bpl, vt_axis_t top, vt_axis_t left,
292     unsigned int width, unsigned int height, term_color_t fg, term_color_t bg);
293 typedef void vd_putchar_t(struct vt_device *vd, term_char_t,
294     vt_axis_t top, vt_axis_t left, term_color_t fg, term_color_t bg);
295 typedef int vd_fb_ioctl_t(struct vt_device *, u_long, caddr_t, struct thread *);
296 typedef int vd_fb_mmap_t(struct vt_device *, vm_ooffset_t, vm_paddr_t *, int,
297     vm_memattr_t *);
298 typedef void vd_drawrect_t(struct vt_device *, int, int, int, int, int,
299     term_color_t);
300 typedef void vd_setpixel_t(struct vt_device *, int, int, term_color_t);
301 
302 struct vt_driver {
303 	char		 vd_name[16];
304 	/* Console attachment. */
305 	vd_probe_t	*vd_probe;
306 	vd_init_t	*vd_init;
307 
308 	/* Drawing. */
309 	vd_blank_t	*vd_blank;
310 	vd_bitbltchr_t	*vd_bitbltchr;
311 	vd_drawrect_t	*vd_drawrect;
312 	vd_setpixel_t	*vd_setpixel;
313 
314 	/* Framebuffer ioctls, if present. */
315 	vd_fb_ioctl_t	*vd_fb_ioctl;
316 
317 	/* Framebuffer mmap, if present. */
318 	vd_fb_mmap_t	*vd_fb_mmap;
319 
320 	/* Text mode operation. */
321 	vd_putchar_t	*vd_putchar;
322 
323 	/* Update display setting on vt switch. */
324 	vd_postswitch_t	*vd_postswitch;
325 
326 	/* Priority to know which one can override */
327 	int		vd_priority;
328 #define	VD_PRIORITY_DUMB	10
329 #define	VD_PRIORITY_GENERIC	100
330 #define	VD_PRIORITY_SPECIFIC	1000
331 };
332 
333 /*
334  * Console device madness.
335  *
336  * Utility macro to make early vt(4) instances work.
337  */
338 
339 extern const struct terminal_class vt_termclass;
340 void vt_upgrade(struct vt_device *vd);
341 
342 #define	PIXEL_WIDTH(w)	((w) / 8)
343 #define	PIXEL_HEIGHT(h)	((h) / 16)
344 
345 #ifndef VT_FB_DEFAULT_WIDTH
346 #define	VT_FB_DEFAULT_WIDTH	2048
347 #endif
348 #ifndef VT_FB_DEFAULT_HEIGHT
349 #define	VT_FB_DEFAULT_HEIGHT	1200
350 #endif
351 
352 /* name argument is not used yet. */
353 #define VT_DRIVER_DECLARE(name, drv) DATA_SET(vt_drv_set, drv)
354 
355 /*
356  * Fonts.
357  *
358  * Remapping tables are used to map Unicode points to glyphs.  They need
359  * to be sorted, because vtfont_lookup() performs a binary search.  Each
360  * font has two remapping tables, for normal and bold.  When a character
361  * is not present in bold, it uses a normal glyph.  When no glyph is
362  * available, it uses glyph 0, which is normally equal to U+FFFD.
363  */
364 
365 struct vt_font_map {
366 	uint32_t		 vfm_src;
367 	uint16_t		 vfm_dst;
368 	uint16_t		 vfm_len;
369 };
370 
371 struct vt_font {
372 	struct vt_font_map	*vf_map[VFNT_MAPS];
373 	uint8_t			*vf_bytes;
374 	unsigned int		 vf_height, vf_width;
375 	unsigned int		 vf_map_count[VFNT_MAPS];
376 	unsigned int		 vf_refcount;
377 };
378 
379 #ifndef SC_NO_CUTPASTE
380 struct mouse_cursor {
381 	uint8_t map[64 * 64 / 8];
382 	uint8_t mask[64 * 64 / 8];
383 	uint8_t w;
384 	uint8_t h;
385 };
386 #endif
387 
388 const uint8_t	*vtfont_lookup(const struct vt_font *vf, term_char_t c);
389 struct vt_font	*vtfont_ref(struct vt_font *vf);
390 void		 vtfont_unref(struct vt_font *vf);
391 int		 vtfont_load(vfnt_t *f, struct vt_font **ret);
392 
393 /* Sysmouse. */
394 void sysmouse_process_event(mouse_info_t *mi);
395 #ifndef SC_NO_CUTPASTE
396 void vt_mouse_event(int type, int x, int y, int event, int cnt, int mlevel);
397 void vt_mouse_state(int show);
398 #endif
399 #define	VT_MOUSE_SHOW 1
400 #define	VT_MOUSE_HIDE 0
401 
402 #endif /* !_DEV_VT_VT_H_ */
403 
404