1 /*
2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
3 *
4 * Copyright (C) 1995 Geert Uytterhoeven
5 *
6 *
7 * This file is based on the original Amiga console driver (amicon.c):
8 *
9 * Copyright (C) 1993 Hamish Macdonald
10 * Greg Harp
11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
12 *
13 * with work by William Rucklidge (wjr@cs.cornell.edu)
14 * Geert Uytterhoeven
15 * Jes Sorensen (jds@kom.auc.dk)
16 * Martin Apel
17 *
18 * and on the original Atari console driver (atacon.c):
19 *
20 * Copyright (C) 1993 Bjoern Brauel
21 * Roman Hodek
22 *
23 * with work by Guenther Kelleter
24 * Martin Schaller
25 * Andreas Schwab
26 *
27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
28 * Smart redraw scrolling, arbitrary font width support, 512char font support
29 * and software scrollback added by
30 * Jakub Jelinek (jj@ultra.linux.cz)
31 *
32 * Random hacking by Martin Mares <mj@ucw.cz>
33 *
34 * 2001 - Documented with DocBook
35 * - Brad Douglas <brad@neruo.com>
36 *
37 * The low level operations for the various display memory organizations are
38 * now in separate source files.
39 *
40 * Currently the following organizations are supported:
41 *
42 * o afb Amiga bitplanes
43 * o cfb{2,4,8,16,24,32} Packed pixels
44 * o ilbm Amiga interleaved bitplanes
45 * o iplan2p[248] Atari interleaved bitplanes
46 * o mfb Monochrome
47 * o vga VGA characters/attributes
48 *
49 * To do:
50 *
51 * - Implement 16 plane mode (iplan2p16)
52 *
53 *
54 * This file is subject to the terms and conditions of the GNU General Public
55 * License. See the file COPYING in the main directory of this archive for
56 * more details.
57 */
58
59 #include <linux/export.h>
60 #include <linux/module.h>
61 #include <linux/types.h>
62 #include <linux/fs.h>
63 #include <linux/kernel.h>
64 #include <linux/delay.h> /* MSch: for IRQ probe */
65 #include <linux/console.h>
66 #include <linux/string.h>
67 #include <linux/kd.h>
68 #include <linux/panic.h>
69 #include <linux/pci.h>
70 #include <linux/printk.h>
71 #include <linux/slab.h>
72 #include <linux/fb.h>
73 #include <linux/fbcon.h>
74 #include <linux/vt_kern.h>
75 #include <linux/selection.h>
76 #include <linux/font.h>
77 #include <linux/smp.h>
78 #include <linux/init.h>
79 #include <linux/interrupt.h>
80 #include <linux/crc32.h> /* For counting font checksums */
81 #include <linux/uaccess.h>
82 #include <linux/vga_switcheroo.h>
83 #include <asm/irq.h>
84
85 #include "fbcon.h"
86 #include "fb_internal.h"
87
88 /*
89 * FIXME: Locking
90 *
91 * - fbcon state itself is protected by the console_lock, and the code does a
92 * pretty good job at making sure that lock is held everywhere it's needed.
93 *
94 * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it
95 * means concurrent access to the same fbdev from both fbcon and userspace
96 * will blow up. To fix this all fbcon calls from fbmem.c need to be moved out
97 * of fb_lock/unlock protected sections, since otherwise we'll recurse and
98 * deadlock eventually. Aside: Due to these deadlock issues the fbdev code in
99 * fbmem.c cannot use locking asserts, and there's lots of callers which get
100 * the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too.
101 */
102
103 enum {
104 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
105 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
106 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
107 };
108
109 static struct fbcon_display fb_display[MAX_NR_CONSOLES];
110
111 static struct fb_info *fbcon_registered_fb[FB_MAX];
112 static int fbcon_num_registered_fb;
113
114 #define fbcon_for_each_registered_fb(i) \
115 for (i = 0; WARN_CONSOLE_UNLOCKED(), i < FB_MAX; i++) \
116 if (!fbcon_registered_fb[i]) {} else
117
118 static signed char con2fb_map[MAX_NR_CONSOLES];
119 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
120
fbcon_info_from_console(int console)121 static struct fb_info *fbcon_info_from_console(int console)
122 {
123 signed char fb;
124 WARN_CONSOLE_UNLOCKED();
125
126 fb = con2fb_map[console];
127 if (fb < 0 || fb >= ARRAY_SIZE(fbcon_registered_fb))
128 return NULL;
129
130 return fbcon_registered_fb[fb];
131 }
132
133 static int logo_lines;
134 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
135 enums. */
136 static int logo_shown = FBCON_LOGO_CANSHOW;
137 /* console mappings */
138 static unsigned int first_fb_vc;
139 static unsigned int last_fb_vc = MAX_NR_CONSOLES - 1;
140 static bool fbcon_is_default = true;
141 static int primary_device = -1;
142 static bool fbcon_has_console_bind;
143
144 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
145 static int map_override;
146
fbcon_map_override(void)147 static inline void fbcon_map_override(void)
148 {
149 map_override = 1;
150 }
151 #else
fbcon_map_override(void)152 static inline void fbcon_map_override(void)
153 {
154 }
155 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
156
157 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
158 static bool deferred_takeover = true;
159 #else
160 #define deferred_takeover false
161 #endif
162
163 /* font data */
164 static char fontname[40];
165
166 /* current fb_info */
167 static int info_idx = -1;
168
169 /* console rotation */
170 static int initial_rotation = -1;
171 static int margin_color;
172
173 static const struct consw fb_con;
174
175 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
176
177 static bool fbcon_cursor_blink = true;
178
179 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
180
181 /*
182 * Interface used by the world
183 */
184
185 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
186 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table);
187
188 /*
189 * Internal routines
190 */
191 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
192 int unit);
193 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
194 int line, int count, int dy);
195 static void fbcon_modechanged(struct fb_info *info);
196 static void fbcon_set_all_vcs(struct fb_info *info);
197
198 static struct device *fbcon_device;
199
200 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
fbcon_set_rotation(struct fb_info * info)201 static inline void fbcon_set_rotation(struct fb_info *info)
202 {
203 struct fbcon_ops *ops = info->fbcon_par;
204
205 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
206 ops->p->con_rotate < 4)
207 ops->rotate = ops->p->con_rotate;
208 else
209 ops->rotate = 0;
210 }
211
fbcon_rotate(struct fb_info * info,u32 rotate)212 static void fbcon_rotate(struct fb_info *info, u32 rotate)
213 {
214 struct fbcon_ops *ops= info->fbcon_par;
215 struct fb_info *fb_info;
216
217 if (!ops || ops->currcon == -1)
218 return;
219
220 fb_info = fbcon_info_from_console(ops->currcon);
221
222 if (info == fb_info) {
223 struct fbcon_display *p = &fb_display[ops->currcon];
224
225 if (rotate < 4)
226 p->con_rotate = rotate;
227 else
228 p->con_rotate = 0;
229
230 fbcon_modechanged(info);
231 }
232 }
233
fbcon_rotate_all(struct fb_info * info,u32 rotate)234 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
235 {
236 struct fbcon_ops *ops = info->fbcon_par;
237 struct vc_data *vc;
238 struct fbcon_display *p;
239 int i;
240
241 if (!ops || ops->currcon < 0 || rotate > 3)
242 return;
243
244 for (i = first_fb_vc; i <= last_fb_vc; i++) {
245 vc = vc_cons[i].d;
246 if (!vc || vc->vc_mode != KD_TEXT ||
247 fbcon_info_from_console(i) != info)
248 continue;
249
250 p = &fb_display[vc->vc_num];
251 p->con_rotate = rotate;
252 }
253
254 fbcon_set_all_vcs(info);
255 }
256 #else
fbcon_set_rotation(struct fb_info * info)257 static inline void fbcon_set_rotation(struct fb_info *info)
258 {
259 struct fbcon_ops *ops = info->fbcon_par;
260
261 ops->rotate = FB_ROTATE_UR;
262 }
263
fbcon_rotate(struct fb_info * info,u32 rotate)264 static void fbcon_rotate(struct fb_info *info, u32 rotate)
265 {
266 return;
267 }
268
fbcon_rotate_all(struct fb_info * info,u32 rotate)269 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
270 {
271 return;
272 }
273 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
274
fbcon_get_rotate(struct fb_info * info)275 static int fbcon_get_rotate(struct fb_info *info)
276 {
277 struct fbcon_ops *ops = info->fbcon_par;
278
279 return (ops) ? ops->rotate : 0;
280 }
281
fbcon_skip_panic(struct fb_info * info)282 static bool fbcon_skip_panic(struct fb_info *info)
283 {
284 return (info->skip_panic && unlikely(panic_in_progress()));
285 }
286
fbcon_is_active(struct vc_data * vc,struct fb_info * info)287 static inline bool fbcon_is_active(struct vc_data *vc, struct fb_info *info)
288 {
289 struct fbcon_ops *ops = info->fbcon_par;
290
291 return info->state == FBINFO_STATE_RUNNING &&
292 vc->vc_mode == KD_TEXT && !ops->graphics && !fbcon_skip_panic(info);
293 }
294
get_color(struct vc_data * vc,struct fb_info * info,u16 c,bool is_fg)295 static int get_color(struct vc_data *vc, struct fb_info *info,
296 u16 c, bool is_fg)
297 {
298 int depth = fb_get_color_depth(&info->var, &info->fix);
299 int color = 0;
300
301 if (console_blanked) {
302 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
303
304 c = vc->vc_video_erase_char & charmask;
305 }
306
307 if (depth != 1)
308 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
309 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
310
311 switch (depth) {
312 case 1:
313 {
314 int col = mono_col(info);
315 /* 0 or 1 */
316 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
317 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
318
319 if (console_blanked)
320 fg = bg;
321
322 color = (is_fg) ? fg : bg;
323 break;
324 }
325 case 2:
326 /*
327 * Scale down 16-colors to 4 colors. Default 4-color palette
328 * is grayscale. However, simply dividing the values by 4
329 * will not work, as colors 1, 2 and 3 will be scaled-down
330 * to zero rendering them invisible. So empirically convert
331 * colors to a sane 4-level grayscale.
332 */
333 switch (color) {
334 case 0:
335 color = 0; /* black */
336 break;
337 case 1 ... 6:
338 color = 2; /* white */
339 break;
340 case 7 ... 8:
341 color = 1; /* gray */
342 break;
343 default:
344 color = 3; /* intense white */
345 break;
346 }
347 break;
348 case 3:
349 /*
350 * Last 8 entries of default 16-color palette is a more intense
351 * version of the first 8 (i.e., same chrominance, different
352 * luminance).
353 */
354 color &= 7;
355 break;
356 }
357
358
359 return color;
360 }
361
get_fg_color(struct vc_data * vc,struct fb_info * info,u16 c)362 static int get_fg_color(struct vc_data *vc, struct fb_info *info, u16 c)
363 {
364 return get_color(vc, info, c, true);
365 }
366
get_bg_color(struct vc_data * vc,struct fb_info * info,u16 c)367 static int get_bg_color(struct vc_data *vc, struct fb_info *info, u16 c)
368 {
369 return get_color(vc, info, c, false);
370 }
371
fb_flashcursor(struct work_struct * work)372 static void fb_flashcursor(struct work_struct *work)
373 {
374 struct fbcon_ops *ops = container_of(work, struct fbcon_ops, cursor_work.work);
375 struct fb_info *info;
376 struct vc_data *vc = NULL;
377 int c;
378 bool enable;
379 int ret;
380
381 /* FIXME: we should sort out the unbind locking instead */
382 /* instead we just fail to flash the cursor if we can't get
383 * the lock instead of blocking fbcon deinit */
384 ret = console_trylock();
385 if (ret == 0)
386 return;
387
388 /* protected by console_lock */
389 info = ops->info;
390
391 if (ops->currcon != -1)
392 vc = vc_cons[ops->currcon].d;
393
394 if (!vc || !con_is_visible(vc) ||
395 fbcon_info_from_console(vc->vc_num) != info ||
396 vc->vc_deccm != 1) {
397 console_unlock();
398 return;
399 }
400
401 c = scr_readw((u16 *) vc->vc_pos);
402 enable = ops->cursor_flash && !ops->cursor_state.enable;
403 ops->cursor(vc, info, enable,
404 get_fg_color(vc, info, c),
405 get_bg_color(vc, info, c));
406 console_unlock();
407
408 queue_delayed_work(system_power_efficient_wq, &ops->cursor_work,
409 ops->cur_blink_jiffies);
410 }
411
fbcon_add_cursor_work(struct fb_info * info)412 static void fbcon_add_cursor_work(struct fb_info *info)
413 {
414 struct fbcon_ops *ops = info->fbcon_par;
415
416 if (fbcon_cursor_blink)
417 queue_delayed_work(system_power_efficient_wq, &ops->cursor_work,
418 ops->cur_blink_jiffies);
419 }
420
fbcon_del_cursor_work(struct fb_info * info)421 static void fbcon_del_cursor_work(struct fb_info *info)
422 {
423 struct fbcon_ops *ops = info->fbcon_par;
424
425 cancel_delayed_work_sync(&ops->cursor_work);
426 }
427
428 #ifndef MODULE
fb_console_setup(char * this_opt)429 static int __init fb_console_setup(char *this_opt)
430 {
431 char *options;
432 int i, j;
433
434 if (!this_opt || !*this_opt)
435 return 1;
436
437 while ((options = strsep(&this_opt, ",")) != NULL) {
438 if (!strncmp(options, "font:", 5)) {
439 strscpy(fontname, options + 5, sizeof(fontname));
440 continue;
441 }
442
443 if (!strncmp(options, "scrollback:", 11)) {
444 pr_warn("Ignoring scrollback size option\n");
445 continue;
446 }
447
448 if (!strncmp(options, "map:", 4)) {
449 options += 4;
450 if (*options) {
451 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
452 if (!options[j])
453 j = 0;
454 con2fb_map_boot[i] =
455 (options[j++]-'0') % FB_MAX;
456 }
457
458 fbcon_map_override();
459 }
460 continue;
461 }
462
463 if (!strncmp(options, "vc:", 3)) {
464 options += 3;
465 if (*options)
466 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
467 if (first_fb_vc >= MAX_NR_CONSOLES)
468 first_fb_vc = 0;
469 if (*options++ == '-')
470 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
471 if (last_fb_vc < first_fb_vc || last_fb_vc >= MAX_NR_CONSOLES)
472 last_fb_vc = MAX_NR_CONSOLES - 1;
473 fbcon_is_default = false;
474 continue;
475 }
476
477 if (!strncmp(options, "rotate:", 7)) {
478 options += 7;
479 if (*options)
480 initial_rotation = simple_strtoul(options, &options, 0);
481 if (initial_rotation > 3)
482 initial_rotation = 0;
483 continue;
484 }
485
486 if (!strncmp(options, "margin:", 7)) {
487 options += 7;
488 if (*options)
489 margin_color = simple_strtoul(options, &options, 0);
490 continue;
491 }
492 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
493 if (!strcmp(options, "nodefer")) {
494 deferred_takeover = false;
495 continue;
496 }
497 #endif
498
499 #ifdef CONFIG_LOGO
500 if (!strncmp(options, "logo-pos:", 9)) {
501 options += 9;
502 if (!strcmp(options, "center"))
503 fb_center_logo = true;
504 continue;
505 }
506
507 if (!strncmp(options, "logo-count:", 11)) {
508 options += 11;
509 if (*options)
510 fb_logo_count = simple_strtol(options, &options, 0);
511 continue;
512 }
513 #endif
514 }
515 return 1;
516 }
517
518 __setup("fbcon=", fb_console_setup);
519 #endif
520
search_fb_in_map(int idx)521 static int search_fb_in_map(int idx)
522 {
523 int i, retval = 0;
524
525 for (i = first_fb_vc; i <= last_fb_vc; i++) {
526 if (con2fb_map[i] == idx) {
527 retval = 1;
528 break;
529 }
530 }
531 return retval;
532 }
533
search_for_mapped_con(void)534 static int search_for_mapped_con(void)
535 {
536 int i, retval = 0;
537
538 for (i = first_fb_vc; i <= last_fb_vc; i++) {
539 if (con2fb_map[i] != -1) {
540 retval = 1;
541 break;
542 }
543 }
544 return retval;
545 }
546
do_fbcon_takeover(int show_logo)547 static int do_fbcon_takeover(int show_logo)
548 {
549 int err, i;
550
551 if (!fbcon_num_registered_fb)
552 return -ENODEV;
553
554 if (!show_logo)
555 logo_shown = FBCON_LOGO_DONTSHOW;
556
557 for (i = first_fb_vc; i <= last_fb_vc; i++)
558 con2fb_map[i] = info_idx;
559
560 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
561 fbcon_is_default);
562
563 if (err) {
564 for (i = first_fb_vc; i <= last_fb_vc; i++)
565 con2fb_map[i] = -1;
566 info_idx = -1;
567 } else {
568 fbcon_has_console_bind = true;
569 }
570
571 return err;
572 }
573
574 #ifdef MODULE
fbcon_prepare_logo(struct vc_data * vc,struct fb_info * info,int cols,int rows,int new_cols,int new_rows)575 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
576 int cols, int rows, int new_cols, int new_rows)
577 {
578 logo_shown = FBCON_LOGO_DONTSHOW;
579 }
580 #else
fbcon_prepare_logo(struct vc_data * vc,struct fb_info * info,int cols,int rows,int new_cols,int new_rows)581 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
582 int cols, int rows, int new_cols, int new_rows)
583 {
584 /* Need to make room for the logo */
585 struct fbcon_ops *ops = info->fbcon_par;
586 int cnt, erase = vc->vc_video_erase_char, step;
587 unsigned short *save = NULL, *r, *q;
588 int logo_height;
589
590 if (info->fbops->owner) {
591 logo_shown = FBCON_LOGO_DONTSHOW;
592 return;
593 }
594
595 /*
596 * remove underline attribute from erase character
597 * if black and white framebuffer.
598 */
599 if (fb_get_color_depth(&info->var, &info->fix) == 1)
600 erase &= ~0x400;
601 logo_height = fb_prepare_logo(info, ops->rotate);
602 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
603 q = (unsigned short *) (vc->vc_origin +
604 vc->vc_size_row * rows);
605 step = logo_lines * cols;
606 for (r = q - logo_lines * cols; r < q; r++)
607 if (scr_readw(r) != vc->vc_video_erase_char)
608 break;
609 if (r != q && new_rows >= rows + logo_lines) {
610 save = kmalloc(array3_size(logo_lines, new_cols, 2),
611 GFP_KERNEL);
612 if (save) {
613 int i = min(cols, new_cols);
614 scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2));
615 r = q - step;
616 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
617 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
618 r = q;
619 }
620 }
621 if (r == q) {
622 /* We can scroll screen down */
623 r = q - step - cols;
624 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
625 scr_memcpyw(r + step, r, vc->vc_size_row);
626 r -= cols;
627 }
628 if (!save) {
629 int lines;
630 if (vc->state.y + logo_lines >= rows)
631 lines = rows - vc->state.y - 1;
632 else
633 lines = logo_lines;
634 vc->state.y += lines;
635 vc->vc_pos += lines * vc->vc_size_row;
636 }
637 }
638 scr_memsetw((unsigned short *) vc->vc_origin,
639 erase,
640 vc->vc_size_row * logo_lines);
641
642 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
643 fbcon_clear_margins(vc, 0);
644 update_screen(vc);
645 }
646
647 if (save) {
648 q = (unsigned short *) (vc->vc_origin +
649 vc->vc_size_row *
650 rows);
651 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2));
652 vc->state.y += logo_lines;
653 vc->vc_pos += logo_lines * vc->vc_size_row;
654 kfree(save);
655 }
656
657 if (logo_shown == FBCON_LOGO_DONTSHOW)
658 return;
659
660 if (logo_lines > vc->vc_bottom) {
661 logo_shown = FBCON_LOGO_CANSHOW;
662 pr_info("fbcon: disable boot-logo (boot-logo bigger than screen).\n");
663 } else {
664 logo_shown = FBCON_LOGO_DRAW;
665 vc->vc_top = logo_lines;
666 }
667 }
668 #endif /* MODULE */
669
670 #ifdef CONFIG_FB_TILEBLITTING
set_blitting_type(struct vc_data * vc,struct fb_info * info)671 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
672 {
673 struct fbcon_ops *ops = info->fbcon_par;
674
675 ops->p = &fb_display[vc->vc_num];
676
677 if ((info->flags & FBINFO_MISC_TILEBLITTING))
678 fbcon_set_tileops(vc, info);
679 else {
680 fbcon_set_rotation(info);
681 fbcon_set_bitops(ops);
682 }
683 }
684
fbcon_invalid_charcount(struct fb_info * info,unsigned charcount)685 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
686 {
687 int err = 0;
688
689 if (info->flags & FBINFO_MISC_TILEBLITTING &&
690 info->tileops->fb_get_tilemax(info) < charcount)
691 err = 1;
692
693 return err;
694 }
695 #else
set_blitting_type(struct vc_data * vc,struct fb_info * info)696 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
697 {
698 struct fbcon_ops *ops = info->fbcon_par;
699
700 info->flags &= ~FBINFO_MISC_TILEBLITTING;
701 ops->p = &fb_display[vc->vc_num];
702 fbcon_set_rotation(info);
703 fbcon_set_bitops(ops);
704 }
705
fbcon_invalid_charcount(struct fb_info * info,unsigned charcount)706 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
707 {
708 return 0;
709 }
710
711 #endif /* CONFIG_MISC_TILEBLITTING */
712
fbcon_release(struct fb_info * info)713 static void fbcon_release(struct fb_info *info)
714 {
715 lock_fb_info(info);
716 if (info->fbops->fb_release)
717 info->fbops->fb_release(info, 0);
718 unlock_fb_info(info);
719
720 module_put(info->fbops->owner);
721
722 if (info->fbcon_par) {
723 struct fbcon_ops *ops = info->fbcon_par;
724
725 fbcon_del_cursor_work(info);
726 kfree(ops->cursor_state.mask);
727 kfree(ops->cursor_data);
728 kfree(ops->cursor_src);
729 kfree(ops->fontbuffer);
730 kfree(info->fbcon_par);
731 info->fbcon_par = NULL;
732 }
733 }
734
fbcon_open(struct fb_info * info)735 static int fbcon_open(struct fb_info *info)
736 {
737 struct fbcon_ops *ops;
738
739 if (!try_module_get(info->fbops->owner))
740 return -ENODEV;
741
742 lock_fb_info(info);
743 if (info->fbops->fb_open &&
744 info->fbops->fb_open(info, 0)) {
745 unlock_fb_info(info);
746 module_put(info->fbops->owner);
747 return -ENODEV;
748 }
749 unlock_fb_info(info);
750
751 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
752 if (!ops) {
753 fbcon_release(info);
754 return -ENOMEM;
755 }
756
757 INIT_DELAYED_WORK(&ops->cursor_work, fb_flashcursor);
758 ops->info = info;
759 info->fbcon_par = ops;
760 ops->cur_blink_jiffies = HZ / 5;
761
762 return 0;
763 }
764
con2fb_acquire_newinfo(struct vc_data * vc,struct fb_info * info,int unit)765 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
766 int unit)
767 {
768 int err;
769
770 err = fbcon_open(info);
771 if (err)
772 return err;
773
774 if (vc)
775 set_blitting_type(vc, info);
776
777 return err;
778 }
779
con2fb_release_oldinfo(struct vc_data * vc,struct fb_info * oldinfo,struct fb_info * newinfo)780 static void con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
781 struct fb_info *newinfo)
782 {
783 int ret;
784
785 fbcon_release(oldinfo);
786
787 /*
788 If oldinfo and newinfo are driving the same hardware,
789 the fb_release() method of oldinfo may attempt to
790 restore the hardware state. This will leave the
791 newinfo in an undefined state. Thus, a call to
792 fb_set_par() may be needed for the newinfo.
793 */
794 if (newinfo && newinfo->fbops->fb_set_par) {
795 ret = newinfo->fbops->fb_set_par(newinfo);
796
797 if (ret)
798 printk(KERN_ERR "con2fb_release_oldinfo: "
799 "detected unhandled fb_set_par error, "
800 "error code %d\n", ret);
801 }
802 }
803
con2fb_init_display(struct vc_data * vc,struct fb_info * info,int unit,int show_logo)804 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
805 int unit, int show_logo)
806 {
807 struct fbcon_ops *ops = info->fbcon_par;
808 int ret;
809
810 ops->currcon = fg_console;
811
812 if (info->fbops->fb_set_par && !ops->initialized) {
813 ret = info->fbops->fb_set_par(info);
814
815 if (ret)
816 printk(KERN_ERR "con2fb_init_display: detected "
817 "unhandled fb_set_par error, "
818 "error code %d\n", ret);
819 }
820
821 ops->initialized = true;
822 ops->graphics = 0;
823 fbcon_set_disp(info, &info->var, unit);
824
825 if (show_logo) {
826 struct vc_data *fg_vc = vc_cons[fg_console].d;
827 struct fb_info *fg_info =
828 fbcon_info_from_console(fg_console);
829
830 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
831 fg_vc->vc_rows, fg_vc->vc_cols,
832 fg_vc->vc_rows);
833 }
834
835 if (fg_console != unit)
836 update_screen(vc_cons[fg_console].d);
837 }
838
839 /**
840 * set_con2fb_map - map console to frame buffer device
841 * @unit: virtual console number to map
842 * @newidx: frame buffer index to map virtual console to
843 * @user: user request
844 *
845 * Maps a virtual console @unit to a frame buffer device
846 * @newidx.
847 *
848 * This should be called with the console lock held.
849 */
set_con2fb_map(int unit,int newidx,int user)850 static int set_con2fb_map(int unit, int newidx, int user)
851 {
852 struct vc_data *vc = vc_cons[unit].d;
853 int oldidx = con2fb_map[unit];
854 struct fb_info *info = fbcon_registered_fb[newidx];
855 struct fb_info *oldinfo = NULL;
856 int err = 0, show_logo;
857
858 WARN_CONSOLE_UNLOCKED();
859
860 if (oldidx == newidx)
861 return 0;
862
863 if (!info)
864 return -EINVAL;
865
866 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
867 info_idx = newidx;
868 return do_fbcon_takeover(0);
869 }
870
871 if (oldidx != -1)
872 oldinfo = fbcon_registered_fb[oldidx];
873
874 if (!search_fb_in_map(newidx)) {
875 err = con2fb_acquire_newinfo(vc, info, unit);
876 if (err)
877 return err;
878
879 fbcon_add_cursor_work(info);
880 } else if (vc) {
881 set_blitting_type(vc, info);
882 }
883
884 con2fb_map[unit] = newidx;
885
886 /*
887 * If old fb is not mapped to any of the consoles,
888 * fbcon should release it.
889 */
890 if (oldinfo && !search_fb_in_map(oldidx))
891 con2fb_release_oldinfo(vc, oldinfo, info);
892
893 show_logo = (fg_console == 0 && !user &&
894 logo_shown != FBCON_LOGO_DONTSHOW);
895
896 con2fb_map_boot[unit] = newidx;
897 con2fb_init_display(vc, info, unit, show_logo);
898
899 if (!search_fb_in_map(info_idx))
900 info_idx = newidx;
901
902 return err;
903 }
904
905 /*
906 * Low Level Operations
907 */
908 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
var_to_display(struct fbcon_display * disp,struct fb_var_screeninfo * var,struct fb_info * info)909 static int var_to_display(struct fbcon_display *disp,
910 struct fb_var_screeninfo *var,
911 struct fb_info *info)
912 {
913 disp->xres_virtual = var->xres_virtual;
914 disp->yres_virtual = var->yres_virtual;
915 disp->bits_per_pixel = var->bits_per_pixel;
916 disp->grayscale = var->grayscale;
917 disp->nonstd = var->nonstd;
918 disp->accel_flags = var->accel_flags;
919 disp->height = var->height;
920 disp->width = var->width;
921 disp->red = var->red;
922 disp->green = var->green;
923 disp->blue = var->blue;
924 disp->transp = var->transp;
925 disp->rotate = var->rotate;
926 disp->mode = fb_match_mode(var, &info->modelist);
927 if (disp->mode == NULL)
928 /* This should not happen */
929 return -EINVAL;
930 return 0;
931 }
932
display_to_var(struct fb_var_screeninfo * var,struct fbcon_display * disp)933 static void display_to_var(struct fb_var_screeninfo *var,
934 struct fbcon_display *disp)
935 {
936 fb_videomode_to_var(var, disp->mode);
937 var->xres_virtual = disp->xres_virtual;
938 var->yres_virtual = disp->yres_virtual;
939 var->bits_per_pixel = disp->bits_per_pixel;
940 var->grayscale = disp->grayscale;
941 var->nonstd = disp->nonstd;
942 var->accel_flags = disp->accel_flags;
943 var->height = disp->height;
944 var->width = disp->width;
945 var->red = disp->red;
946 var->green = disp->green;
947 var->blue = disp->blue;
948 var->transp = disp->transp;
949 var->rotate = disp->rotate;
950 }
951
fbcon_startup(void)952 static const char *fbcon_startup(void)
953 {
954 static const char display_desc[] = "frame buffer device";
955 struct fbcon_display *p = &fb_display[fg_console];
956 struct vc_data *vc = vc_cons[fg_console].d;
957 const struct font_desc *font = NULL;
958 struct fb_info *info = NULL;
959 struct fbcon_ops *ops;
960 int rows, cols;
961
962 /*
963 * If fbcon_num_registered_fb is zero, this is a call for the dummy part.
964 * The frame buffer devices weren't initialized yet.
965 */
966 if (!fbcon_num_registered_fb || info_idx == -1)
967 return display_desc;
968 /*
969 * Instead of blindly using fbcon_registered_fb[0], we use info_idx, set by
970 * fbcon_fb_registered();
971 */
972 info = fbcon_registered_fb[info_idx];
973 if (!info)
974 return NULL;
975
976 if (fbcon_open(info))
977 return NULL;
978
979 ops = info->fbcon_par;
980 ops->currcon = -1;
981 ops->graphics = 1;
982 ops->cur_rotate = -1;
983
984 p->con_rotate = initial_rotation;
985 if (p->con_rotate == -1)
986 p->con_rotate = info->fbcon_rotate_hint;
987 if (p->con_rotate == -1)
988 p->con_rotate = FB_ROTATE_UR;
989
990 set_blitting_type(vc, info);
991
992 /* Setup default font */
993 if (!p->fontdata) {
994 if (!fontname[0] || !(font = find_font(fontname)))
995 font = get_default_font(info->var.xres,
996 info->var.yres,
997 info->pixmap.blit_x,
998 info->pixmap.blit_y);
999 vc->vc_font.width = font->width;
1000 vc->vc_font.height = font->height;
1001 vc->vc_font.data = (void *)(p->fontdata = font->data);
1002 vc->vc_font.charcount = font->charcount;
1003 }
1004
1005 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1006 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1007 cols /= vc->vc_font.width;
1008 rows /= vc->vc_font.height;
1009 vc_resize(vc, cols, rows);
1010
1011 pr_debug("mode: %s\n", info->fix.id);
1012 pr_debug("visual: %d\n", info->fix.visual);
1013 pr_debug("res: %dx%d-%d\n", info->var.xres,
1014 info->var.yres,
1015 info->var.bits_per_pixel);
1016
1017 fbcon_add_cursor_work(info);
1018 return display_desc;
1019 }
1020
fbcon_init(struct vc_data * vc,bool init)1021 static void fbcon_init(struct vc_data *vc, bool init)
1022 {
1023 struct fb_info *info;
1024 struct fbcon_ops *ops;
1025 struct vc_data **default_mode = vc->vc_display_fg;
1026 struct vc_data *svc = *default_mode;
1027 struct fbcon_display *t, *p = &fb_display[vc->vc_num];
1028 int logo = 1, new_rows, new_cols, rows, cols;
1029 int ret;
1030
1031 if (WARN_ON(info_idx == -1))
1032 return;
1033
1034 if (con2fb_map[vc->vc_num] == -1)
1035 con2fb_map[vc->vc_num] = info_idx;
1036
1037 info = fbcon_info_from_console(vc->vc_num);
1038
1039 if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET)
1040 logo_shown = FBCON_LOGO_DONTSHOW;
1041
1042 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1043 (info->fix.type == FB_TYPE_TEXT))
1044 logo = 0;
1045
1046 if (var_to_display(p, &info->var, info))
1047 return;
1048
1049 if (!info->fbcon_par)
1050 con2fb_acquire_newinfo(vc, info, vc->vc_num);
1051
1052 /* If we are not the first console on this
1053 fb, copy the font from that console */
1054 t = &fb_display[fg_console];
1055 if (!p->fontdata) {
1056 if (t->fontdata) {
1057 struct vc_data *fvc = vc_cons[fg_console].d;
1058
1059 vc->vc_font.data = (void *)(p->fontdata =
1060 fvc->vc_font.data);
1061 vc->vc_font.width = fvc->vc_font.width;
1062 vc->vc_font.height = fvc->vc_font.height;
1063 vc->vc_font.charcount = fvc->vc_font.charcount;
1064 p->userfont = t->userfont;
1065
1066 if (p->userfont)
1067 REFCOUNT(p->fontdata)++;
1068 } else {
1069 const struct font_desc *font = NULL;
1070
1071 if (!fontname[0] || !(font = find_font(fontname)))
1072 font = get_default_font(info->var.xres,
1073 info->var.yres,
1074 info->pixmap.blit_x,
1075 info->pixmap.blit_y);
1076 vc->vc_font.width = font->width;
1077 vc->vc_font.height = font->height;
1078 vc->vc_font.data = (void *)(p->fontdata = font->data);
1079 vc->vc_font.charcount = font->charcount;
1080 }
1081 }
1082
1083 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1084 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1085 if (vc->vc_font.charcount == 256) {
1086 vc->vc_hi_font_mask = 0;
1087 } else {
1088 vc->vc_hi_font_mask = 0x100;
1089 if (vc->vc_can_do_color)
1090 vc->vc_complement_mask <<= 1;
1091 }
1092
1093 if (!*svc->uni_pagedict_loc)
1094 con_set_default_unimap(svc);
1095 if (!*vc->uni_pagedict_loc)
1096 con_copy_unimap(vc, svc);
1097
1098 ops = info->fbcon_par;
1099 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1100
1101 p->con_rotate = initial_rotation;
1102 if (p->con_rotate == -1)
1103 p->con_rotate = info->fbcon_rotate_hint;
1104 if (p->con_rotate == -1)
1105 p->con_rotate = FB_ROTATE_UR;
1106
1107 set_blitting_type(vc, info);
1108
1109 cols = vc->vc_cols;
1110 rows = vc->vc_rows;
1111 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1112 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1113 new_cols /= vc->vc_font.width;
1114 new_rows /= vc->vc_font.height;
1115
1116 /*
1117 * We must always set the mode. The mode of the previous console
1118 * driver could be in the same resolution but we are using different
1119 * hardware so we have to initialize the hardware.
1120 *
1121 * We need to do it in fbcon_init() to prevent screen corruption.
1122 */
1123 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
1124 if (info->fbops->fb_set_par && !ops->initialized) {
1125 ret = info->fbops->fb_set_par(info);
1126
1127 if (ret)
1128 printk(KERN_ERR "fbcon_init: detected "
1129 "unhandled fb_set_par error, "
1130 "error code %d\n", ret);
1131 }
1132
1133 ops->initialized = true;
1134 }
1135
1136 ops->graphics = 0;
1137
1138 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION
1139 if ((info->flags & FBINFO_HWACCEL_COPYAREA) &&
1140 !(info->flags & FBINFO_HWACCEL_DISABLED))
1141 p->scrollmode = SCROLL_MOVE;
1142 else /* default to something safe */
1143 p->scrollmode = SCROLL_REDRAW;
1144 #endif
1145
1146 /*
1147 * ++guenther: console.c:vc_allocate() relies on initializing
1148 * vc_{cols,rows}, but we must not set those if we are only
1149 * resizing the console.
1150 */
1151 if (init) {
1152 vc->vc_cols = new_cols;
1153 vc->vc_rows = new_rows;
1154 } else
1155 vc_resize(vc, new_cols, new_rows);
1156
1157 if (logo)
1158 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1159
1160 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1161 ops->rotate = FB_ROTATE_UR;
1162 set_blitting_type(vc, info);
1163 }
1164
1165 ops->p = &fb_display[fg_console];
1166 }
1167
fbcon_free_font(struct fbcon_display * p)1168 static void fbcon_free_font(struct fbcon_display *p)
1169 {
1170 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1171 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1172 p->fontdata = NULL;
1173 p->userfont = 0;
1174 }
1175
1176 static void set_vc_hi_font(struct vc_data *vc, bool set);
1177
fbcon_release_all(void)1178 static void fbcon_release_all(void)
1179 {
1180 struct fb_info *info;
1181 int i, j, mapped;
1182
1183 fbcon_for_each_registered_fb(i) {
1184 mapped = 0;
1185 info = fbcon_registered_fb[i];
1186
1187 for (j = first_fb_vc; j <= last_fb_vc; j++) {
1188 if (con2fb_map[j] == i) {
1189 mapped = 1;
1190 con2fb_map[j] = -1;
1191 }
1192 }
1193
1194 if (mapped)
1195 fbcon_release(info);
1196 }
1197 }
1198
fbcon_deinit(struct vc_data * vc)1199 static void fbcon_deinit(struct vc_data *vc)
1200 {
1201 struct fbcon_display *p = &fb_display[vc->vc_num];
1202 struct fb_info *info;
1203 struct fbcon_ops *ops;
1204 int idx;
1205
1206 fbcon_free_font(p);
1207 idx = con2fb_map[vc->vc_num];
1208
1209 if (idx == -1)
1210 goto finished;
1211
1212 info = fbcon_registered_fb[idx];
1213
1214 if (!info)
1215 goto finished;
1216
1217 ops = info->fbcon_par;
1218
1219 if (!ops)
1220 goto finished;
1221
1222 if (con_is_visible(vc))
1223 fbcon_del_cursor_work(info);
1224
1225 ops->initialized = false;
1226 finished:
1227
1228 fbcon_free_font(p);
1229 vc->vc_font.data = NULL;
1230
1231 if (vc->vc_hi_font_mask && vc->vc_screenbuf)
1232 set_vc_hi_font(vc, false);
1233
1234 if (!con_is_bound(&fb_con))
1235 fbcon_release_all();
1236
1237 if (vc->vc_num == logo_shown)
1238 logo_shown = FBCON_LOGO_CANSHOW;
1239
1240 return;
1241 }
1242
1243 /* ====================================================================== */
1244
1245 /* fbcon_XXX routines - interface used by the world
1246 *
1247 * This system is now divided into two levels because of complications
1248 * caused by hardware scrolling. Top level functions:
1249 *
1250 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1251 *
1252 * handles y values in range [0, scr_height-1] that correspond to real
1253 * screen positions. y_wrap shift means that first line of bitmap may be
1254 * anywhere on this display. These functions convert lineoffsets to
1255 * bitmap offsets and deal with the wrap-around case by splitting blits.
1256 *
1257 * fbcon_bmove_physical_8() -- These functions fast implementations
1258 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1259 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1260 *
1261 * WARNING:
1262 *
1263 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1264 * Implies should only really hardware scroll in rows. Only reason for
1265 * restriction is simplicity & efficiency at the moment.
1266 */
1267
__fbcon_clear(struct vc_data * vc,unsigned int sy,unsigned int sx,unsigned int height,unsigned int width)1268 static void __fbcon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx,
1269 unsigned int height, unsigned int width)
1270 {
1271 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1272 struct fbcon_ops *ops = info->fbcon_par;
1273 int fg, bg;
1274 struct fbcon_display *p = &fb_display[vc->vc_num];
1275 u_int y_break;
1276
1277 if (!fbcon_is_active(vc, info))
1278 return;
1279
1280 if (!height || !width)
1281 return;
1282
1283 if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1284 vc->vc_top = 0;
1285 /*
1286 * If the font dimensions are not an integral of the display
1287 * dimensions then the ops->clear below won't end up clearing
1288 * the margins. Call clear_margins here in case the logo
1289 * bitmap stretched into the margin area.
1290 */
1291 fbcon_clear_margins(vc, 0);
1292 }
1293
1294 fg = get_color(vc, info, vc->vc_video_erase_char, 1);
1295 bg = get_color(vc, info, vc->vc_video_erase_char, 0);
1296 /* Split blits that cross physical y_wrap boundary */
1297
1298 y_break = p->vrows - p->yscroll;
1299 if (sy < y_break && sy + height - 1 >= y_break) {
1300 u_int b = y_break - sy;
1301 ops->clear(vc, info, real_y(p, sy), sx, b, width, fg, bg);
1302 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1303 width, fg, bg);
1304 } else
1305 ops->clear(vc, info, real_y(p, sy), sx, height, width, fg, bg);
1306 }
1307
fbcon_clear(struct vc_data * vc,unsigned int sy,unsigned int sx,unsigned int width)1308 static void fbcon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx,
1309 unsigned int width)
1310 {
1311 __fbcon_clear(vc, sy, sx, 1, width);
1312 }
1313
fbcon_putcs(struct vc_data * vc,const u16 * s,unsigned int count,unsigned int ypos,unsigned int xpos)1314 static void fbcon_putcs(struct vc_data *vc, const u16 *s, unsigned int count,
1315 unsigned int ypos, unsigned int xpos)
1316 {
1317 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1318 struct fbcon_display *p = &fb_display[vc->vc_num];
1319 struct fbcon_ops *ops = info->fbcon_par;
1320
1321 if (fbcon_is_active(vc, info))
1322 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1323 get_fg_color(vc, info, scr_readw(s)),
1324 get_bg_color(vc, info, scr_readw(s)));
1325 }
1326
fbcon_clear_margins(struct vc_data * vc,int bottom_only)1327 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1328 {
1329 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1330 struct fbcon_ops *ops = info->fbcon_par;
1331
1332 if (fbcon_is_active(vc, info))
1333 ops->clear_margins(vc, info, margin_color, bottom_only);
1334 }
1335
fbcon_cursor(struct vc_data * vc,bool enable)1336 static void fbcon_cursor(struct vc_data *vc, bool enable)
1337 {
1338 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1339 struct fbcon_ops *ops = info->fbcon_par;
1340 int c = scr_readw((u16 *) vc->vc_pos);
1341
1342 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1343
1344 if (!fbcon_is_active(vc, info) || vc->vc_deccm != 1)
1345 return;
1346
1347 if (vc->vc_cursor_type & CUR_SW)
1348 fbcon_del_cursor_work(info);
1349 else
1350 fbcon_add_cursor_work(info);
1351
1352 ops->cursor_flash = enable;
1353
1354 if (!ops->cursor)
1355 return;
1356
1357 ops->cursor(vc, info, enable,
1358 get_fg_color(vc, info, c),
1359 get_bg_color(vc, info, c));
1360 }
1361
1362 static int scrollback_phys_max = 0;
1363 static int scrollback_max = 0;
1364 static int scrollback_current = 0;
1365
fbcon_set_disp(struct fb_info * info,struct fb_var_screeninfo * var,int unit)1366 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1367 int unit)
1368 {
1369 struct fbcon_display *p, *t;
1370 struct vc_data **default_mode, *vc;
1371 struct vc_data *svc;
1372 struct fbcon_ops *ops = info->fbcon_par;
1373 int rows, cols;
1374 unsigned long ret = 0;
1375
1376 p = &fb_display[unit];
1377
1378 if (var_to_display(p, var, info))
1379 return;
1380
1381 vc = vc_cons[unit].d;
1382
1383 if (!vc)
1384 return;
1385
1386 default_mode = vc->vc_display_fg;
1387 svc = *default_mode;
1388 t = &fb_display[svc->vc_num];
1389
1390 if (!vc->vc_font.data) {
1391 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1392 vc->vc_font.width = (*default_mode)->vc_font.width;
1393 vc->vc_font.height = (*default_mode)->vc_font.height;
1394 vc->vc_font.charcount = (*default_mode)->vc_font.charcount;
1395 p->userfont = t->userfont;
1396 if (p->userfont)
1397 REFCOUNT(p->fontdata)++;
1398 }
1399
1400 var->activate = FB_ACTIVATE_NOW;
1401 info->var.activate = var->activate;
1402 var->yoffset = info->var.yoffset;
1403 var->xoffset = info->var.xoffset;
1404 fb_set_var(info, var);
1405 ops->var = info->var;
1406 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1407 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1408 if (vc->vc_font.charcount == 256) {
1409 vc->vc_hi_font_mask = 0;
1410 } else {
1411 vc->vc_hi_font_mask = 0x100;
1412 if (vc->vc_can_do_color)
1413 vc->vc_complement_mask <<= 1;
1414 }
1415
1416 if (!*svc->uni_pagedict_loc)
1417 con_set_default_unimap(svc);
1418 if (!*vc->uni_pagedict_loc)
1419 con_copy_unimap(vc, svc);
1420
1421 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1422 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1423 cols /= vc->vc_font.width;
1424 rows /= vc->vc_font.height;
1425 ret = vc_resize(vc, cols, rows);
1426
1427 if (con_is_visible(vc) && !ret)
1428 update_screen(vc);
1429 }
1430
ywrap_up(struct vc_data * vc,int count)1431 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1432 {
1433 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1434 struct fbcon_ops *ops = info->fbcon_par;
1435 struct fbcon_display *p = &fb_display[vc->vc_num];
1436
1437 p->yscroll += count;
1438 if (p->yscroll >= p->vrows) /* Deal with wrap */
1439 p->yscroll -= p->vrows;
1440 ops->var.xoffset = 0;
1441 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1442 ops->var.vmode |= FB_VMODE_YWRAP;
1443 ops->update_start(info);
1444 scrollback_max += count;
1445 if (scrollback_max > scrollback_phys_max)
1446 scrollback_max = scrollback_phys_max;
1447 scrollback_current = 0;
1448 }
1449
ywrap_down(struct vc_data * vc,int count)1450 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1451 {
1452 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1453 struct fbcon_ops *ops = info->fbcon_par;
1454 struct fbcon_display *p = &fb_display[vc->vc_num];
1455
1456 p->yscroll -= count;
1457 if (p->yscroll < 0) /* Deal with wrap */
1458 p->yscroll += p->vrows;
1459 ops->var.xoffset = 0;
1460 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1461 ops->var.vmode |= FB_VMODE_YWRAP;
1462 ops->update_start(info);
1463 scrollback_max -= count;
1464 if (scrollback_max < 0)
1465 scrollback_max = 0;
1466 scrollback_current = 0;
1467 }
1468
ypan_up(struct vc_data * vc,int count)1469 static __inline__ void ypan_up(struct vc_data *vc, int count)
1470 {
1471 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1472 struct fbcon_display *p = &fb_display[vc->vc_num];
1473 struct fbcon_ops *ops = info->fbcon_par;
1474
1475 p->yscroll += count;
1476 if (p->yscroll > p->vrows - vc->vc_rows) {
1477 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1478 0, 0, 0, vc->vc_rows, vc->vc_cols);
1479 p->yscroll -= p->vrows - vc->vc_rows;
1480 }
1481
1482 ops->var.xoffset = 0;
1483 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1484 ops->var.vmode &= ~FB_VMODE_YWRAP;
1485 ops->update_start(info);
1486 fbcon_clear_margins(vc, 1);
1487 scrollback_max += count;
1488 if (scrollback_max > scrollback_phys_max)
1489 scrollback_max = scrollback_phys_max;
1490 scrollback_current = 0;
1491 }
1492
ypan_up_redraw(struct vc_data * vc,int t,int count)1493 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1494 {
1495 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1496 struct fbcon_ops *ops = info->fbcon_par;
1497 struct fbcon_display *p = &fb_display[vc->vc_num];
1498
1499 p->yscroll += count;
1500
1501 if (p->yscroll > p->vrows - vc->vc_rows) {
1502 p->yscroll -= p->vrows - vc->vc_rows;
1503 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1504 }
1505
1506 ops->var.xoffset = 0;
1507 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1508 ops->var.vmode &= ~FB_VMODE_YWRAP;
1509 ops->update_start(info);
1510 fbcon_clear_margins(vc, 1);
1511 scrollback_max += count;
1512 if (scrollback_max > scrollback_phys_max)
1513 scrollback_max = scrollback_phys_max;
1514 scrollback_current = 0;
1515 }
1516
ypan_down(struct vc_data * vc,int count)1517 static __inline__ void ypan_down(struct vc_data *vc, int count)
1518 {
1519 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1520 struct fbcon_display *p = &fb_display[vc->vc_num];
1521 struct fbcon_ops *ops = info->fbcon_par;
1522
1523 p->yscroll -= count;
1524 if (p->yscroll < 0) {
1525 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1526 0, vc->vc_rows, vc->vc_cols);
1527 p->yscroll += p->vrows - vc->vc_rows;
1528 }
1529
1530 ops->var.xoffset = 0;
1531 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1532 ops->var.vmode &= ~FB_VMODE_YWRAP;
1533 ops->update_start(info);
1534 fbcon_clear_margins(vc, 1);
1535 scrollback_max -= count;
1536 if (scrollback_max < 0)
1537 scrollback_max = 0;
1538 scrollback_current = 0;
1539 }
1540
ypan_down_redraw(struct vc_data * vc,int t,int count)1541 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1542 {
1543 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1544 struct fbcon_ops *ops = info->fbcon_par;
1545 struct fbcon_display *p = &fb_display[vc->vc_num];
1546
1547 p->yscroll -= count;
1548
1549 if (p->yscroll < 0) {
1550 p->yscroll += p->vrows - vc->vc_rows;
1551 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1552 }
1553
1554 ops->var.xoffset = 0;
1555 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1556 ops->var.vmode &= ~FB_VMODE_YWRAP;
1557 ops->update_start(info);
1558 fbcon_clear_margins(vc, 1);
1559 scrollback_max -= count;
1560 if (scrollback_max < 0)
1561 scrollback_max = 0;
1562 scrollback_current = 0;
1563 }
1564
fbcon_redraw_move(struct vc_data * vc,struct fbcon_display * p,int line,int count,int dy)1565 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
1566 int line, int count, int dy)
1567 {
1568 unsigned short *s = (unsigned short *)
1569 (vc->vc_origin + vc->vc_size_row * line);
1570
1571 while (count--) {
1572 unsigned short *start = s;
1573 unsigned short *le = advance_row(s, 1);
1574 unsigned short c;
1575 int x = 0;
1576 unsigned short attr = 1;
1577
1578 do {
1579 c = scr_readw(s);
1580 if (attr != (c & 0xff00)) {
1581 attr = c & 0xff00;
1582 if (s > start) {
1583 fbcon_putcs(vc, start, s - start,
1584 dy, x);
1585 x += s - start;
1586 start = s;
1587 }
1588 }
1589 console_conditional_schedule();
1590 s++;
1591 } while (s < le);
1592 if (s > start)
1593 fbcon_putcs(vc, start, s - start, dy, x);
1594 console_conditional_schedule();
1595 dy++;
1596 }
1597 }
1598
fbcon_redraw_blit(struct vc_data * vc,struct fb_info * info,struct fbcon_display * p,int line,int count,int ycount)1599 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1600 struct fbcon_display *p, int line, int count, int ycount)
1601 {
1602 int offset = ycount * vc->vc_cols;
1603 unsigned short *d = (unsigned short *)
1604 (vc->vc_origin + vc->vc_size_row * line);
1605 unsigned short *s = d + offset;
1606 struct fbcon_ops *ops = info->fbcon_par;
1607
1608 while (count--) {
1609 unsigned short *start = s;
1610 unsigned short *le = advance_row(s, 1);
1611 unsigned short c;
1612 int x = 0;
1613
1614 do {
1615 c = scr_readw(s);
1616
1617 if (c == scr_readw(d)) {
1618 if (s > start) {
1619 ops->bmove(vc, info, line + ycount, x,
1620 line, x, 1, s-start);
1621 x += s - start + 1;
1622 start = s + 1;
1623 } else {
1624 x++;
1625 start++;
1626 }
1627 }
1628
1629 scr_writew(c, d);
1630 console_conditional_schedule();
1631 s++;
1632 d++;
1633 } while (s < le);
1634 if (s > start)
1635 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1636 s-start);
1637 console_conditional_schedule();
1638 if (ycount > 0)
1639 line++;
1640 else {
1641 line--;
1642 /* NOTE: We subtract two lines from these pointers */
1643 s -= vc->vc_size_row;
1644 d -= vc->vc_size_row;
1645 }
1646 }
1647 }
1648
fbcon_redraw(struct vc_data * vc,int line,int count,int offset)1649 static void fbcon_redraw(struct vc_data *vc, int line, int count, int offset)
1650 {
1651 unsigned short *d = (unsigned short *)
1652 (vc->vc_origin + vc->vc_size_row * line);
1653 unsigned short *s = d + offset;
1654
1655 while (count--) {
1656 unsigned short *start = s;
1657 unsigned short *le = advance_row(s, 1);
1658 unsigned short c;
1659 int x = 0;
1660 unsigned short attr = 1;
1661
1662 do {
1663 c = scr_readw(s);
1664 if (attr != (c & 0xff00)) {
1665 attr = c & 0xff00;
1666 if (s > start) {
1667 fbcon_putcs(vc, start, s - start,
1668 line, x);
1669 x += s - start;
1670 start = s;
1671 }
1672 }
1673 if (c == scr_readw(d)) {
1674 if (s > start) {
1675 fbcon_putcs(vc, start, s - start,
1676 line, x);
1677 x += s - start + 1;
1678 start = s + 1;
1679 } else {
1680 x++;
1681 start++;
1682 }
1683 }
1684 scr_writew(c, d);
1685 console_conditional_schedule();
1686 s++;
1687 d++;
1688 } while (s < le);
1689 if (s > start)
1690 fbcon_putcs(vc, start, s - start, line, x);
1691 console_conditional_schedule();
1692 if (offset > 0)
1693 line++;
1694 else {
1695 line--;
1696 /* NOTE: We subtract two lines from these pointers */
1697 s -= vc->vc_size_row;
1698 d -= vc->vc_size_row;
1699 }
1700 }
1701 }
1702
fbcon_bmove_rec(struct vc_data * vc,struct fbcon_display * p,int sy,int sx,int dy,int dx,int height,int width,u_int y_break)1703 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
1704 int dy, int dx, int height, int width, u_int y_break)
1705 {
1706 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1707 struct fbcon_ops *ops = info->fbcon_par;
1708 u_int b;
1709
1710 if (sy < y_break && sy + height > y_break) {
1711 b = y_break - sy;
1712 if (dy < sy) { /* Avoid trashing self */
1713 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1714 y_break);
1715 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1716 height - b, width, y_break);
1717 } else {
1718 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1719 height - b, width, y_break);
1720 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1721 y_break);
1722 }
1723 return;
1724 }
1725
1726 if (dy < y_break && dy + height > y_break) {
1727 b = y_break - dy;
1728 if (dy < sy) { /* Avoid trashing self */
1729 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1730 y_break);
1731 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1732 height - b, width, y_break);
1733 } else {
1734 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1735 height - b, width, y_break);
1736 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1737 y_break);
1738 }
1739 return;
1740 }
1741 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
1742 height, width);
1743 }
1744
fbcon_bmove(struct vc_data * vc,int sy,int sx,int dy,int dx,int height,int width)1745 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1746 int height, int width)
1747 {
1748 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1749 struct fbcon_display *p = &fb_display[vc->vc_num];
1750
1751 if (!fbcon_is_active(vc, info))
1752 return;
1753
1754 if (!width || !height)
1755 return;
1756
1757 /* Split blits that cross physical y_wrap case.
1758 * Pathological case involves 4 blits, better to use recursive
1759 * code rather than unrolled case
1760 *
1761 * Recursive invocations don't need to erase the cursor over and
1762 * over again, so we use fbcon_bmove_rec()
1763 */
1764 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1765 p->vrows - p->yscroll);
1766 }
1767
fbcon_scroll(struct vc_data * vc,unsigned int t,unsigned int b,enum con_scroll dir,unsigned int count)1768 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
1769 enum con_scroll dir, unsigned int count)
1770 {
1771 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1772 struct fbcon_display *p = &fb_display[vc->vc_num];
1773 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1774
1775 if (!fbcon_is_active(vc, info))
1776 return true;
1777
1778 fbcon_cursor(vc, false);
1779
1780 /*
1781 * ++Geert: Only use ywrap/ypan if the console is in text mode
1782 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1783 * whole screen (prevents flicker).
1784 */
1785
1786 switch (dir) {
1787 case SM_UP:
1788 if (count > vc->vc_rows) /* Maximum realistic size */
1789 count = vc->vc_rows;
1790 switch (fb_scrollmode(p)) {
1791 case SCROLL_MOVE:
1792 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1793 count);
1794 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1795 scr_memsetw((unsigned short *) (vc->vc_origin +
1796 vc->vc_size_row *
1797 (b - count)),
1798 vc->vc_video_erase_char,
1799 vc->vc_size_row * count);
1800 return true;
1801
1802 case SCROLL_WRAP_MOVE:
1803 if (b - t - count > 3 * vc->vc_rows >> 2) {
1804 if (t > 0)
1805 fbcon_bmove(vc, 0, 0, count, 0, t,
1806 vc->vc_cols);
1807 ywrap_up(vc, count);
1808 if (vc->vc_rows - b > 0)
1809 fbcon_bmove(vc, b - count, 0, b, 0,
1810 vc->vc_rows - b,
1811 vc->vc_cols);
1812 } else if (info->flags & FBINFO_READS_FAST)
1813 fbcon_bmove(vc, t + count, 0, t, 0,
1814 b - t - count, vc->vc_cols);
1815 else
1816 goto redraw_up;
1817 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1818 break;
1819
1820 case SCROLL_PAN_REDRAW:
1821 if ((p->yscroll + count <=
1822 2 * (p->vrows - vc->vc_rows))
1823 && ((!scroll_partial && (b - t == vc->vc_rows))
1824 || (scroll_partial
1825 && (b - t - count >
1826 3 * vc->vc_rows >> 2)))) {
1827 if (t > 0)
1828 fbcon_redraw_move(vc, p, 0, t, count);
1829 ypan_up_redraw(vc, t, count);
1830 if (vc->vc_rows - b > 0)
1831 fbcon_redraw_move(vc, p, b,
1832 vc->vc_rows - b, b);
1833 } else
1834 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1835 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1836 break;
1837
1838 case SCROLL_PAN_MOVE:
1839 if ((p->yscroll + count <=
1840 2 * (p->vrows - vc->vc_rows))
1841 && ((!scroll_partial && (b - t == vc->vc_rows))
1842 || (scroll_partial
1843 && (b - t - count >
1844 3 * vc->vc_rows >> 2)))) {
1845 if (t > 0)
1846 fbcon_bmove(vc, 0, 0, count, 0, t,
1847 vc->vc_cols);
1848 ypan_up(vc, count);
1849 if (vc->vc_rows - b > 0)
1850 fbcon_bmove(vc, b - count, 0, b, 0,
1851 vc->vc_rows - b,
1852 vc->vc_cols);
1853 } else if (info->flags & FBINFO_READS_FAST)
1854 fbcon_bmove(vc, t + count, 0, t, 0,
1855 b - t - count, vc->vc_cols);
1856 else
1857 goto redraw_up;
1858 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1859 break;
1860
1861 case SCROLL_REDRAW:
1862 redraw_up:
1863 fbcon_redraw(vc, t, b - t - count,
1864 count * vc->vc_cols);
1865 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1866 scr_memsetw((unsigned short *) (vc->vc_origin +
1867 vc->vc_size_row *
1868 (b - count)),
1869 vc->vc_video_erase_char,
1870 vc->vc_size_row * count);
1871 return true;
1872 }
1873 break;
1874
1875 case SM_DOWN:
1876 if (count > vc->vc_rows) /* Maximum realistic size */
1877 count = vc->vc_rows;
1878 switch (fb_scrollmode(p)) {
1879 case SCROLL_MOVE:
1880 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1881 -count);
1882 __fbcon_clear(vc, t, 0, count, vc->vc_cols);
1883 scr_memsetw((unsigned short *) (vc->vc_origin +
1884 vc->vc_size_row *
1885 t),
1886 vc->vc_video_erase_char,
1887 vc->vc_size_row * count);
1888 return true;
1889
1890 case SCROLL_WRAP_MOVE:
1891 if (b - t - count > 3 * vc->vc_rows >> 2) {
1892 if (vc->vc_rows - b > 0)
1893 fbcon_bmove(vc, b, 0, b - count, 0,
1894 vc->vc_rows - b,
1895 vc->vc_cols);
1896 ywrap_down(vc, count);
1897 if (t > 0)
1898 fbcon_bmove(vc, count, 0, 0, 0, t,
1899 vc->vc_cols);
1900 } else if (info->flags & FBINFO_READS_FAST)
1901 fbcon_bmove(vc, t, 0, t + count, 0,
1902 b - t - count, vc->vc_cols);
1903 else
1904 goto redraw_down;
1905 __fbcon_clear(vc, t, 0, count, vc->vc_cols);
1906 break;
1907
1908 case SCROLL_PAN_MOVE:
1909 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1910 && ((!scroll_partial && (b - t == vc->vc_rows))
1911 || (scroll_partial
1912 && (b - t - count >
1913 3 * vc->vc_rows >> 2)))) {
1914 if (vc->vc_rows - b > 0)
1915 fbcon_bmove(vc, b, 0, b - count, 0,
1916 vc->vc_rows - b,
1917 vc->vc_cols);
1918 ypan_down(vc, count);
1919 if (t > 0)
1920 fbcon_bmove(vc, count, 0, 0, 0, t,
1921 vc->vc_cols);
1922 } else if (info->flags & FBINFO_READS_FAST)
1923 fbcon_bmove(vc, t, 0, t + count, 0,
1924 b - t - count, vc->vc_cols);
1925 else
1926 goto redraw_down;
1927 __fbcon_clear(vc, t, 0, count, vc->vc_cols);
1928 break;
1929
1930 case SCROLL_PAN_REDRAW:
1931 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1932 && ((!scroll_partial && (b - t == vc->vc_rows))
1933 || (scroll_partial
1934 && (b - t - count >
1935 3 * vc->vc_rows >> 2)))) {
1936 if (vc->vc_rows - b > 0)
1937 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1938 b - count);
1939 ypan_down_redraw(vc, t, count);
1940 if (t > 0)
1941 fbcon_redraw_move(vc, p, count, t, 0);
1942 } else
1943 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1944 __fbcon_clear(vc, t, 0, count, vc->vc_cols);
1945 break;
1946
1947 case SCROLL_REDRAW:
1948 redraw_down:
1949 fbcon_redraw(vc, b - 1, b - t - count,
1950 -count * vc->vc_cols);
1951 __fbcon_clear(vc, t, 0, count, vc->vc_cols);
1952 scr_memsetw((unsigned short *) (vc->vc_origin +
1953 vc->vc_size_row *
1954 t),
1955 vc->vc_video_erase_char,
1956 vc->vc_size_row * count);
1957 return true;
1958 }
1959 }
1960 return false;
1961 }
1962
1963
updatescrollmode_accel(struct fbcon_display * p,struct fb_info * info,struct vc_data * vc)1964 static void updatescrollmode_accel(struct fbcon_display *p,
1965 struct fb_info *info,
1966 struct vc_data *vc)
1967 {
1968 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION
1969 struct fbcon_ops *ops = info->fbcon_par;
1970 int cap = info->flags;
1971 u16 t = 0;
1972 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
1973 info->fix.xpanstep);
1974 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
1975 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1976 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
1977 info->var.xres_virtual);
1978 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
1979 divides(ypan, vc->vc_font.height) && vyres > yres;
1980 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
1981 divides(ywrap, vc->vc_font.height) &&
1982 divides(vc->vc_font.height, vyres) &&
1983 divides(vc->vc_font.height, yres);
1984 int reading_fast = cap & FBINFO_READS_FAST;
1985 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
1986 !(cap & FBINFO_HWACCEL_DISABLED);
1987 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
1988 !(cap & FBINFO_HWACCEL_DISABLED);
1989
1990 if (good_wrap || good_pan) {
1991 if (reading_fast || fast_copyarea)
1992 p->scrollmode = good_wrap ?
1993 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1994 else
1995 p->scrollmode = good_wrap ? SCROLL_REDRAW :
1996 SCROLL_PAN_REDRAW;
1997 } else {
1998 if (reading_fast || (fast_copyarea && !fast_imageblit))
1999 p->scrollmode = SCROLL_MOVE;
2000 else
2001 p->scrollmode = SCROLL_REDRAW;
2002 }
2003 #endif
2004 }
2005
updatescrollmode(struct fbcon_display * p,struct fb_info * info,struct vc_data * vc)2006 static void updatescrollmode(struct fbcon_display *p,
2007 struct fb_info *info,
2008 struct vc_data *vc)
2009 {
2010 struct fbcon_ops *ops = info->fbcon_par;
2011 int fh = vc->vc_font.height;
2012 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2013 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2014 info->var.xres_virtual);
2015
2016 p->vrows = vyres/fh;
2017 if (yres > (fh * (vc->vc_rows + 1)))
2018 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2019 if ((yres % fh) && (vyres % fh < yres % fh))
2020 p->vrows--;
2021
2022 /* update scrollmode in case hardware acceleration is used */
2023 updatescrollmode_accel(p, info, vc);
2024 }
2025
2026 #define PITCH(w) (((w) + 7) >> 3)
2027 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */
2028
fbcon_resize(struct vc_data * vc,unsigned int width,unsigned int height,bool from_user)2029 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2030 unsigned int height, bool from_user)
2031 {
2032 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2033 struct fbcon_ops *ops = info->fbcon_par;
2034 struct fbcon_display *p = &fb_display[vc->vc_num];
2035 struct fb_var_screeninfo var = info->var;
2036 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2037
2038 if (p->userfont && FNTSIZE(vc->vc_font.data)) {
2039 int size;
2040 int pitch = PITCH(vc->vc_font.width);
2041
2042 /*
2043 * If user font, ensure that a possible change to user font
2044 * height or width will not allow a font data out-of-bounds access.
2045 * NOTE: must use original charcount in calculation as font
2046 * charcount can change and cannot be used to determine the
2047 * font data allocated size.
2048 */
2049 if (pitch <= 0)
2050 return -EINVAL;
2051 size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount);
2052 if (size > FNTSIZE(vc->vc_font.data))
2053 return -EINVAL;
2054 }
2055
2056 virt_w = FBCON_SWAP(ops->rotate, width, height);
2057 virt_h = FBCON_SWAP(ops->rotate, height, width);
2058 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2059 vc->vc_font.height);
2060 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2061 vc->vc_font.width);
2062 var.xres = virt_w * virt_fw;
2063 var.yres = virt_h * virt_fh;
2064 x_diff = info->var.xres - var.xres;
2065 y_diff = info->var.yres - var.yres;
2066 if (x_diff < 0 || x_diff > virt_fw ||
2067 y_diff < 0 || y_diff > virt_fh) {
2068 const struct fb_videomode *mode;
2069
2070 pr_debug("attempting resize %ix%i\n", var.xres, var.yres);
2071 mode = fb_find_best_mode(&var, &info->modelist);
2072 if (mode == NULL)
2073 return -EINVAL;
2074 display_to_var(&var, p);
2075 fb_videomode_to_var(&var, mode);
2076
2077 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2078 return -EINVAL;
2079
2080 pr_debug("resize now %ix%i\n", var.xres, var.yres);
2081 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
2082 var.activate = FB_ACTIVATE_NOW |
2083 FB_ACTIVATE_FORCE;
2084 fb_set_var(info, &var);
2085 }
2086 var_to_display(p, &info->var, info);
2087 ops->var = info->var;
2088 }
2089 updatescrollmode(p, info, vc);
2090 return 0;
2091 }
2092
fbcon_switch(struct vc_data * vc)2093 static bool fbcon_switch(struct vc_data *vc)
2094 {
2095 struct fb_info *info, *old_info = NULL;
2096 struct fbcon_ops *ops;
2097 struct fbcon_display *p = &fb_display[vc->vc_num];
2098 struct fb_var_screeninfo var;
2099 int i, ret, prev_console;
2100
2101 info = fbcon_info_from_console(vc->vc_num);
2102 ops = info->fbcon_par;
2103
2104 if (logo_shown >= 0) {
2105 struct vc_data *conp2 = vc_cons[logo_shown].d;
2106
2107 if (conp2->vc_top == logo_lines
2108 && conp2->vc_bottom == conp2->vc_rows)
2109 conp2->vc_top = 0;
2110 logo_shown = FBCON_LOGO_CANSHOW;
2111 }
2112
2113 prev_console = ops->currcon;
2114 if (prev_console != -1)
2115 old_info = fbcon_info_from_console(prev_console);
2116 /*
2117 * FIXME: If we have multiple fbdev's loaded, we need to
2118 * update all info->currcon. Perhaps, we can place this
2119 * in a centralized structure, but this might break some
2120 * drivers.
2121 *
2122 * info->currcon = vc->vc_num;
2123 */
2124 fbcon_for_each_registered_fb(i) {
2125 if (fbcon_registered_fb[i]->fbcon_par) {
2126 struct fbcon_ops *o = fbcon_registered_fb[i]->fbcon_par;
2127
2128 o->currcon = vc->vc_num;
2129 }
2130 }
2131 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2132 display_to_var(&var, p);
2133 var.activate = FB_ACTIVATE_NOW;
2134
2135 /*
2136 * make sure we don't unnecessarily trip the memcmp()
2137 * in fb_set_var()
2138 */
2139 info->var.activate = var.activate;
2140 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2141 fb_set_var(info, &var);
2142 ops->var = info->var;
2143
2144 if (old_info != NULL && (old_info != info ||
2145 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2146 if (info->fbops->fb_set_par) {
2147 ret = info->fbops->fb_set_par(info);
2148
2149 if (ret)
2150 printk(KERN_ERR "fbcon_switch: detected "
2151 "unhandled fb_set_par error, "
2152 "error code %d\n", ret);
2153 }
2154
2155 if (old_info != info)
2156 fbcon_del_cursor_work(old_info);
2157 }
2158
2159 if (!fbcon_is_active(vc, info) ||
2160 ops->blank_state != FB_BLANK_UNBLANK)
2161 fbcon_del_cursor_work(info);
2162 else
2163 fbcon_add_cursor_work(info);
2164
2165 set_blitting_type(vc, info);
2166 ops->cursor_reset = 1;
2167
2168 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2169 ops->rotate = FB_ROTATE_UR;
2170 set_blitting_type(vc, info);
2171 }
2172
2173 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2174 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2175
2176 if (vc->vc_font.charcount > 256)
2177 vc->vc_complement_mask <<= 1;
2178
2179 updatescrollmode(p, info, vc);
2180
2181 switch (fb_scrollmode(p)) {
2182 case SCROLL_WRAP_MOVE:
2183 scrollback_phys_max = p->vrows - vc->vc_rows;
2184 break;
2185 case SCROLL_PAN_MOVE:
2186 case SCROLL_PAN_REDRAW:
2187 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2188 if (scrollback_phys_max < 0)
2189 scrollback_phys_max = 0;
2190 break;
2191 default:
2192 scrollback_phys_max = 0;
2193 break;
2194 }
2195
2196 scrollback_max = 0;
2197 scrollback_current = 0;
2198
2199 if (fbcon_is_active(vc, info)) {
2200 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2201 ops->update_start(info);
2202 }
2203
2204 fbcon_set_palette(vc, color_table);
2205 fbcon_clear_margins(vc, 0);
2206
2207 if (logo_shown == FBCON_LOGO_DRAW) {
2208
2209 logo_shown = fg_console;
2210 fb_show_logo(info, ops->rotate);
2211 update_region(vc,
2212 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2213 vc->vc_size_row * (vc->vc_bottom -
2214 vc->vc_top) / 2);
2215 return false;
2216 }
2217 return true;
2218 }
2219
fbcon_generic_blank(struct vc_data * vc,struct fb_info * info,int blank)2220 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2221 int blank)
2222 {
2223 if (blank) {
2224 unsigned short charmask = vc->vc_hi_font_mask ?
2225 0x1ff : 0xff;
2226 unsigned short oldc;
2227
2228 oldc = vc->vc_video_erase_char;
2229 vc->vc_video_erase_char &= charmask;
2230 __fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2231 vc->vc_video_erase_char = oldc;
2232 }
2233 }
2234
fbcon_blank(struct vc_data * vc,enum vesa_blank_mode blank,bool mode_switch)2235 static bool fbcon_blank(struct vc_data *vc, enum vesa_blank_mode blank,
2236 bool mode_switch)
2237 {
2238 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2239 struct fbcon_ops *ops = info->fbcon_par;
2240
2241 if (mode_switch) {
2242 struct fb_var_screeninfo var = info->var;
2243
2244 ops->graphics = 1;
2245
2246 if (!blank) {
2247 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE |
2248 FB_ACTIVATE_KD_TEXT;
2249 fb_set_var(info, &var);
2250 ops->graphics = 0;
2251 ops->var = info->var;
2252 }
2253 }
2254
2255 if (fbcon_is_active(vc, info)) {
2256 if (ops->blank_state != blank) {
2257 ops->blank_state = blank;
2258 fbcon_cursor(vc, !blank);
2259 ops->cursor_flash = (!blank);
2260
2261 if (fb_blank(info, blank))
2262 fbcon_generic_blank(vc, info, blank);
2263 }
2264
2265 if (!blank)
2266 update_screen(vc);
2267 }
2268
2269 if (mode_switch || !fbcon_is_active(vc, info) ||
2270 ops->blank_state != FB_BLANK_UNBLANK)
2271 fbcon_del_cursor_work(info);
2272 else
2273 fbcon_add_cursor_work(info);
2274
2275 return false;
2276 }
2277
fbcon_debug_enter(struct vc_data * vc)2278 static void fbcon_debug_enter(struct vc_data *vc)
2279 {
2280 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2281 struct fbcon_ops *ops = info->fbcon_par;
2282
2283 ops->save_graphics = ops->graphics;
2284 ops->graphics = 0;
2285 if (info->fbops->fb_debug_enter)
2286 info->fbops->fb_debug_enter(info);
2287 fbcon_set_palette(vc, color_table);
2288 }
2289
fbcon_debug_leave(struct vc_data * vc)2290 static void fbcon_debug_leave(struct vc_data *vc)
2291 {
2292 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2293 struct fbcon_ops *ops = info->fbcon_par;
2294
2295 ops->graphics = ops->save_graphics;
2296 if (info->fbops->fb_debug_leave)
2297 info->fbops->fb_debug_leave(info);
2298 }
2299
fbcon_get_font(struct vc_data * vc,struct console_font * font,unsigned int vpitch)2300 static int fbcon_get_font(struct vc_data *vc, struct console_font *font, unsigned int vpitch)
2301 {
2302 u8 *fontdata = vc->vc_font.data;
2303 u8 *data = font->data;
2304 int i, j;
2305
2306 font->width = vc->vc_font.width;
2307 font->height = vc->vc_font.height;
2308 if (font->height > vpitch)
2309 return -ENOSPC;
2310 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2311 if (!font->data)
2312 return 0;
2313
2314 if (font->width <= 8) {
2315 j = vc->vc_font.height;
2316 if (font->charcount * j > FNTSIZE(fontdata))
2317 return -EINVAL;
2318
2319 for (i = 0; i < font->charcount; i++) {
2320 memcpy(data, fontdata, j);
2321 memset(data + j, 0, vpitch - j);
2322 data += vpitch;
2323 fontdata += j;
2324 }
2325 } else if (font->width <= 16) {
2326 j = vc->vc_font.height * 2;
2327 if (font->charcount * j > FNTSIZE(fontdata))
2328 return -EINVAL;
2329
2330 for (i = 0; i < font->charcount; i++) {
2331 memcpy(data, fontdata, j);
2332 memset(data + j, 0, 2*vpitch - j);
2333 data += 2*vpitch;
2334 fontdata += j;
2335 }
2336 } else if (font->width <= 24) {
2337 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata))
2338 return -EINVAL;
2339
2340 for (i = 0; i < font->charcount; i++) {
2341 for (j = 0; j < vc->vc_font.height; j++) {
2342 *data++ = fontdata[0];
2343 *data++ = fontdata[1];
2344 *data++ = fontdata[2];
2345 fontdata += sizeof(u32);
2346 }
2347 memset(data, 0, 3 * (vpitch - j));
2348 data += 3 * (vpitch - j);
2349 }
2350 } else {
2351 j = vc->vc_font.height * 4;
2352 if (font->charcount * j > FNTSIZE(fontdata))
2353 return -EINVAL;
2354
2355 for (i = 0; i < font->charcount; i++) {
2356 memcpy(data, fontdata, j);
2357 memset(data + j, 0, 4 * vpitch - j);
2358 data += 4 * vpitch;
2359 fontdata += j;
2360 }
2361 }
2362 return 0;
2363 }
2364
2365 /* set/clear vc_hi_font_mask and update vc attrs accordingly */
set_vc_hi_font(struct vc_data * vc,bool set)2366 static void set_vc_hi_font(struct vc_data *vc, bool set)
2367 {
2368 if (!set) {
2369 vc->vc_hi_font_mask = 0;
2370 if (vc->vc_can_do_color) {
2371 vc->vc_complement_mask >>= 1;
2372 vc->vc_s_complement_mask >>= 1;
2373 }
2374
2375 /* ++Edmund: reorder the attribute bits */
2376 if (vc->vc_can_do_color) {
2377 unsigned short *cp =
2378 (unsigned short *) vc->vc_origin;
2379 int count = vc->vc_screenbuf_size / 2;
2380 unsigned short c;
2381 for (; count > 0; count--, cp++) {
2382 c = scr_readw(cp);
2383 scr_writew(((c & 0xfe00) >> 1) |
2384 (c & 0xff), cp);
2385 }
2386 c = vc->vc_video_erase_char;
2387 vc->vc_video_erase_char =
2388 ((c & 0xfe00) >> 1) | (c & 0xff);
2389 vc->vc_attr >>= 1;
2390 }
2391 } else {
2392 vc->vc_hi_font_mask = 0x100;
2393 if (vc->vc_can_do_color) {
2394 vc->vc_complement_mask <<= 1;
2395 vc->vc_s_complement_mask <<= 1;
2396 }
2397
2398 /* ++Edmund: reorder the attribute bits */
2399 {
2400 unsigned short *cp =
2401 (unsigned short *) vc->vc_origin;
2402 int count = vc->vc_screenbuf_size / 2;
2403 unsigned short c;
2404 for (; count > 0; count--, cp++) {
2405 unsigned short newc;
2406 c = scr_readw(cp);
2407 if (vc->vc_can_do_color)
2408 newc =
2409 ((c & 0xff00) << 1) | (c &
2410 0xff);
2411 else
2412 newc = c & ~0x100;
2413 scr_writew(newc, cp);
2414 }
2415 c = vc->vc_video_erase_char;
2416 if (vc->vc_can_do_color) {
2417 vc->vc_video_erase_char =
2418 ((c & 0xff00) << 1) | (c & 0xff);
2419 vc->vc_attr <<= 1;
2420 } else
2421 vc->vc_video_erase_char = c & ~0x100;
2422 }
2423 }
2424 }
2425
fbcon_do_set_font(struct vc_data * vc,int w,int h,int charcount,const u8 * data,int userfont)2426 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount,
2427 const u8 * data, int userfont)
2428 {
2429 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2430 struct fbcon_ops *ops = info->fbcon_par;
2431 struct fbcon_display *p = &fb_display[vc->vc_num];
2432 int resize, ret, old_userfont, old_width, old_height, old_charcount;
2433 u8 *old_data = vc->vc_font.data;
2434
2435 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2436 vc->vc_font.data = (void *)(p->fontdata = data);
2437 old_userfont = p->userfont;
2438 if ((p->userfont = userfont))
2439 REFCOUNT(data)++;
2440
2441 old_width = vc->vc_font.width;
2442 old_height = vc->vc_font.height;
2443 old_charcount = vc->vc_font.charcount;
2444
2445 vc->vc_font.width = w;
2446 vc->vc_font.height = h;
2447 vc->vc_font.charcount = charcount;
2448 if (vc->vc_hi_font_mask && charcount == 256)
2449 set_vc_hi_font(vc, false);
2450 else if (!vc->vc_hi_font_mask && charcount == 512)
2451 set_vc_hi_font(vc, true);
2452
2453 if (resize) {
2454 int cols, rows;
2455
2456 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2457 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2458 cols /= w;
2459 rows /= h;
2460 ret = vc_resize(vc, cols, rows);
2461 if (ret)
2462 goto err_out;
2463 } else if (con_is_visible(vc)
2464 && vc->vc_mode == KD_TEXT) {
2465 fbcon_clear_margins(vc, 0);
2466 update_screen(vc);
2467 }
2468
2469 if (old_userfont && (--REFCOUNT(old_data) == 0))
2470 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2471 return 0;
2472
2473 err_out:
2474 p->fontdata = old_data;
2475 vc->vc_font.data = old_data;
2476
2477 if (userfont) {
2478 p->userfont = old_userfont;
2479 if (--REFCOUNT(data) == 0)
2480 kfree(data - FONT_EXTRA_WORDS * sizeof(int));
2481 }
2482
2483 vc->vc_font.width = old_width;
2484 vc->vc_font.height = old_height;
2485 vc->vc_font.charcount = old_charcount;
2486
2487 return ret;
2488 }
2489
2490 /*
2491 * User asked to set font; we are guaranteed that charcount does not exceed 512
2492 * but lets not assume that, since charcount of 512 is small for unicode support.
2493 */
2494
fbcon_set_font(struct vc_data * vc,const struct console_font * font,unsigned int vpitch,unsigned int flags)2495 static int fbcon_set_font(struct vc_data *vc, const struct console_font *font,
2496 unsigned int vpitch, unsigned int flags)
2497 {
2498 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2499 unsigned charcount = font->charcount;
2500 int w = font->width;
2501 int h = font->height;
2502 int size, alloc_size;
2503 int i, csum;
2504 u8 *new_data, *data = font->data;
2505 int pitch = PITCH(font->width);
2506
2507 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2508 * If not this check should be changed to charcount < 256 */
2509 if (charcount != 256 && charcount != 512)
2510 return -EINVAL;
2511
2512 /* font bigger than screen resolution ? */
2513 if (w > FBCON_SWAP(info->var.rotate, info->var.xres, info->var.yres) ||
2514 h > FBCON_SWAP(info->var.rotate, info->var.yres, info->var.xres))
2515 return -EINVAL;
2516
2517 if (font->width > FB_MAX_BLIT_WIDTH || font->height > FB_MAX_BLIT_HEIGHT)
2518 return -EINVAL;
2519
2520 /* Make sure drawing engine can handle the font */
2521 if (!test_bit(font->width - 1, info->pixmap.blit_x) ||
2522 !test_bit(font->height - 1, info->pixmap.blit_y))
2523 return -EINVAL;
2524
2525 /* Make sure driver can handle the font length */
2526 if (fbcon_invalid_charcount(info, charcount))
2527 return -EINVAL;
2528
2529 /* Check for integer overflow in font size calculation */
2530 if (check_mul_overflow(h, pitch, &size) ||
2531 check_mul_overflow(size, charcount, &size))
2532 return -EINVAL;
2533
2534 /* Check for overflow in allocation size calculation */
2535 if (check_add_overflow(FONT_EXTRA_WORDS * sizeof(int), size, &alloc_size))
2536 return -EINVAL;
2537
2538 new_data = kmalloc(alloc_size, GFP_USER);
2539
2540 if (!new_data)
2541 return -ENOMEM;
2542
2543 memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int));
2544
2545 new_data += FONT_EXTRA_WORDS * sizeof(int);
2546 FNTSIZE(new_data) = size;
2547 REFCOUNT(new_data) = 0; /* usage counter */
2548 for (i=0; i< charcount; i++) {
2549 memcpy(new_data + i*h*pitch, data + i*vpitch*pitch, h*pitch);
2550 }
2551
2552 /* Since linux has a nice crc32 function use it for counting font
2553 * checksums. */
2554 csum = crc32(0, new_data, size);
2555
2556 FNTSUM(new_data) = csum;
2557 /* Check if the same font is on some other console already */
2558 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2559 struct vc_data *tmp = vc_cons[i].d;
2560
2561 if (fb_display[i].userfont &&
2562 fb_display[i].fontdata &&
2563 FNTSUM(fb_display[i].fontdata) == csum &&
2564 FNTSIZE(fb_display[i].fontdata) == size &&
2565 tmp->vc_font.width == w &&
2566 !memcmp(fb_display[i].fontdata, new_data, size)) {
2567 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2568 new_data = (u8 *)fb_display[i].fontdata;
2569 break;
2570 }
2571 }
2572 return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1);
2573 }
2574
fbcon_set_def_font(struct vc_data * vc,struct console_font * font,const char * name)2575 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font,
2576 const char *name)
2577 {
2578 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2579 const struct font_desc *f;
2580
2581 if (!name)
2582 f = get_default_font(info->var.xres, info->var.yres,
2583 info->pixmap.blit_x, info->pixmap.blit_y);
2584 else if (!(f = find_font(name)))
2585 return -ENOENT;
2586
2587 font->width = f->width;
2588 font->height = f->height;
2589 return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0);
2590 }
2591
2592 static u16 palette_red[16];
2593 static u16 palette_green[16];
2594 static u16 palette_blue[16];
2595
2596 static struct fb_cmap palette_cmap = {
2597 0, 16, palette_red, palette_green, palette_blue, NULL
2598 };
2599
fbcon_set_palette(struct vc_data * vc,const unsigned char * table)2600 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
2601 {
2602 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2603 int i, j, k, depth;
2604 u8 val;
2605
2606 if (!fbcon_is_active(vc, info))
2607 return;
2608
2609 if (!con_is_visible(vc))
2610 return;
2611
2612 depth = fb_get_color_depth(&info->var, &info->fix);
2613 if (depth > 3) {
2614 for (i = j = 0; i < 16; i++) {
2615 k = table[i];
2616 val = vc->vc_palette[j++];
2617 palette_red[k] = (val << 8) | val;
2618 val = vc->vc_palette[j++];
2619 palette_green[k] = (val << 8) | val;
2620 val = vc->vc_palette[j++];
2621 palette_blue[k] = (val << 8) | val;
2622 }
2623 palette_cmap.len = 16;
2624 palette_cmap.start = 0;
2625 /*
2626 * If framebuffer is capable of less than 16 colors,
2627 * use default palette of fbcon.
2628 */
2629 } else
2630 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2631
2632 fb_set_cmap(&palette_cmap, info);
2633 }
2634
2635 /* As we might be inside of softback, we may work with non-contiguous buffer,
2636 that's why we have to use a separate routine. */
fbcon_invert_region(struct vc_data * vc,u16 * p,int cnt)2637 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2638 {
2639 while (cnt--) {
2640 u16 a = scr_readw(p);
2641 if (!vc->vc_can_do_color)
2642 a ^= 0x0800;
2643 else if (vc->vc_hi_font_mask == 0x100)
2644 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2645 (((a) & 0x0e00) << 4);
2646 else
2647 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2648 (((a) & 0x0700) << 4);
2649 scr_writew(a, p++);
2650 }
2651 }
2652
fbcon_suspended(struct fb_info * info)2653 void fbcon_suspended(struct fb_info *info)
2654 {
2655 struct vc_data *vc = NULL;
2656 struct fbcon_ops *ops = info->fbcon_par;
2657
2658 if (!ops || ops->currcon < 0)
2659 return;
2660 vc = vc_cons[ops->currcon].d;
2661
2662 /* Clear cursor, restore saved data */
2663 fbcon_cursor(vc, false);
2664 }
2665
fbcon_resumed(struct fb_info * info)2666 void fbcon_resumed(struct fb_info *info)
2667 {
2668 struct vc_data *vc;
2669 struct fbcon_ops *ops = info->fbcon_par;
2670
2671 if (!ops || ops->currcon < 0)
2672 return;
2673 vc = vc_cons[ops->currcon].d;
2674
2675 update_screen(vc);
2676 }
2677
fbcon_modechanged(struct fb_info * info)2678 static void fbcon_modechanged(struct fb_info *info)
2679 {
2680 struct fbcon_ops *ops = info->fbcon_par;
2681 struct vc_data *vc;
2682 struct fbcon_display *p;
2683 int rows, cols;
2684
2685 if (!ops || ops->currcon < 0)
2686 return;
2687 vc = vc_cons[ops->currcon].d;
2688 if (vc->vc_mode != KD_TEXT ||
2689 fbcon_info_from_console(ops->currcon) != info)
2690 return;
2691
2692 p = &fb_display[vc->vc_num];
2693 set_blitting_type(vc, info);
2694
2695 if (con_is_visible(vc)) {
2696 var_to_display(p, &info->var, info);
2697 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2698 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2699 cols /= vc->vc_font.width;
2700 rows /= vc->vc_font.height;
2701 vc_resize(vc, cols, rows);
2702 updatescrollmode(p, info, vc);
2703 scrollback_max = 0;
2704 scrollback_current = 0;
2705
2706 if (fbcon_is_active(vc, info)) {
2707 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2708 ops->update_start(info);
2709 }
2710
2711 fbcon_set_palette(vc, color_table);
2712 update_screen(vc);
2713 }
2714 }
2715
fbcon_set_all_vcs(struct fb_info * info)2716 static void fbcon_set_all_vcs(struct fb_info *info)
2717 {
2718 struct fbcon_ops *ops = info->fbcon_par;
2719 struct vc_data *vc;
2720 struct fbcon_display *p;
2721 int i, rows, cols, fg = -1;
2722
2723 if (!ops || ops->currcon < 0)
2724 return;
2725
2726 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2727 vc = vc_cons[i].d;
2728 if (!vc || vc->vc_mode != KD_TEXT ||
2729 fbcon_info_from_console(i) != info)
2730 continue;
2731
2732 if (con_is_visible(vc)) {
2733 fg = i;
2734 continue;
2735 }
2736
2737 p = &fb_display[vc->vc_num];
2738 set_blitting_type(vc, info);
2739 var_to_display(p, &info->var, info);
2740 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2741 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2742 cols /= vc->vc_font.width;
2743 rows /= vc->vc_font.height;
2744 vc_resize(vc, cols, rows);
2745 }
2746
2747 if (fg != -1)
2748 fbcon_modechanged(info);
2749 }
2750
2751
fbcon_update_vcs(struct fb_info * info,bool all)2752 void fbcon_update_vcs(struct fb_info *info, bool all)
2753 {
2754 if (all)
2755 fbcon_set_all_vcs(info);
2756 else
2757 fbcon_modechanged(info);
2758 }
2759 EXPORT_SYMBOL(fbcon_update_vcs);
2760
2761 /* let fbcon check if it supports a new screen resolution */
fbcon_modechange_possible(struct fb_info * info,struct fb_var_screeninfo * var)2762 int fbcon_modechange_possible(struct fb_info *info, struct fb_var_screeninfo *var)
2763 {
2764 struct fbcon_ops *ops = info->fbcon_par;
2765 struct vc_data *vc;
2766 unsigned int i;
2767
2768 WARN_CONSOLE_UNLOCKED();
2769
2770 if (!ops)
2771 return 0;
2772
2773 /* prevent setting a screen size which is smaller than font size */
2774 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2775 vc = vc_cons[i].d;
2776 if (!vc || vc->vc_mode != KD_TEXT ||
2777 fbcon_info_from_console(i) != info)
2778 continue;
2779
2780 if (vc->vc_font.width > FBCON_SWAP(var->rotate, var->xres, var->yres) ||
2781 vc->vc_font.height > FBCON_SWAP(var->rotate, var->yres, var->xres))
2782 return -EINVAL;
2783 }
2784
2785 return 0;
2786 }
2787 EXPORT_SYMBOL_GPL(fbcon_modechange_possible);
2788
fbcon_mode_deleted(struct fb_info * info,struct fb_videomode * mode)2789 int fbcon_mode_deleted(struct fb_info *info,
2790 struct fb_videomode *mode)
2791 {
2792 struct fb_info *fb_info;
2793 struct fbcon_display *p;
2794 int i, j, found = 0;
2795
2796 /* before deletion, ensure that mode is not in use */
2797 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2798 j = con2fb_map[i];
2799 if (j == -1)
2800 continue;
2801 fb_info = fbcon_registered_fb[j];
2802 if (fb_info != info)
2803 continue;
2804 p = &fb_display[i];
2805 if (!p || !p->mode)
2806 continue;
2807 if (fb_mode_is_equal(p->mode, mode)) {
2808 found = 1;
2809 break;
2810 }
2811 }
2812 return found;
2813 }
2814
fbcon_delete_mode(struct fb_videomode * m)2815 static void fbcon_delete_mode(struct fb_videomode *m)
2816 {
2817 struct fbcon_display *p;
2818
2819 for (int i = first_fb_vc; i <= last_fb_vc; i++) {
2820 p = &fb_display[i];
2821 if (p->mode == m)
2822 p->mode = NULL;
2823 }
2824 }
2825
fbcon_delete_modelist(struct list_head * head)2826 void fbcon_delete_modelist(struct list_head *head)
2827 {
2828 struct fb_modelist *modelist;
2829
2830 list_for_each_entry(modelist, head, list)
2831 fbcon_delete_mode(&modelist->mode);
2832 }
2833
2834 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
fbcon_unbind(void)2835 static void fbcon_unbind(void)
2836 {
2837 int ret;
2838
2839 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2840 fbcon_is_default);
2841
2842 if (!ret)
2843 fbcon_has_console_bind = false;
2844 }
2845 #else
fbcon_unbind(void)2846 static inline void fbcon_unbind(void) {}
2847 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
2848
fbcon_fb_unbind(struct fb_info * info)2849 void fbcon_fb_unbind(struct fb_info *info)
2850 {
2851 int i, new_idx = -1;
2852 int idx = info->node;
2853
2854 console_lock();
2855
2856 if (!fbcon_has_console_bind) {
2857 console_unlock();
2858 return;
2859 }
2860
2861 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2862 if (con2fb_map[i] != idx &&
2863 con2fb_map[i] != -1) {
2864 new_idx = con2fb_map[i];
2865 break;
2866 }
2867 }
2868
2869 if (new_idx != -1) {
2870 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2871 if (con2fb_map[i] == idx)
2872 set_con2fb_map(i, new_idx, 0);
2873 }
2874 } else {
2875 struct fb_info *info = fbcon_registered_fb[idx];
2876
2877 /* This is sort of like set_con2fb_map, except it maps
2878 * the consoles to no device and then releases the
2879 * oldinfo to free memory and cancel the cursor blink
2880 * timer. I can imagine this just becoming part of
2881 * set_con2fb_map where new_idx is -1
2882 */
2883 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2884 if (con2fb_map[i] == idx) {
2885 con2fb_map[i] = -1;
2886 if (!search_fb_in_map(idx)) {
2887 con2fb_release_oldinfo(vc_cons[i].d,
2888 info, NULL);
2889 }
2890 }
2891 }
2892 fbcon_unbind();
2893 }
2894
2895 console_unlock();
2896 }
2897
fbcon_fb_unregistered(struct fb_info * info)2898 void fbcon_fb_unregistered(struct fb_info *info)
2899 {
2900 int i, idx;
2901
2902 console_lock();
2903
2904 if (info->device && dev_is_pci(info->device))
2905 vga_switcheroo_client_fb_set(to_pci_dev(info->device), NULL);
2906
2907 fbcon_registered_fb[info->node] = NULL;
2908 fbcon_num_registered_fb--;
2909
2910 if (deferred_takeover) {
2911 console_unlock();
2912 return;
2913 }
2914
2915 idx = info->node;
2916 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2917 if (con2fb_map[i] == idx)
2918 con2fb_map[i] = -1;
2919 }
2920
2921 if (idx == info_idx) {
2922 info_idx = -1;
2923
2924 fbcon_for_each_registered_fb(i) {
2925 info_idx = i;
2926 break;
2927 }
2928 }
2929
2930 if (info_idx != -1) {
2931 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2932 if (con2fb_map[i] == -1)
2933 con2fb_map[i] = info_idx;
2934 }
2935 }
2936
2937 if (primary_device == idx)
2938 primary_device = -1;
2939
2940 if (!fbcon_num_registered_fb)
2941 do_unregister_con_driver(&fb_con);
2942 console_unlock();
2943 }
2944
fbcon_remap_all(struct fb_info * info)2945 void fbcon_remap_all(struct fb_info *info)
2946 {
2947 int i, idx = info->node;
2948
2949 console_lock();
2950 if (deferred_takeover) {
2951 for (i = first_fb_vc; i <= last_fb_vc; i++)
2952 con2fb_map_boot[i] = idx;
2953 fbcon_map_override();
2954 console_unlock();
2955 return;
2956 }
2957
2958 for (i = first_fb_vc; i <= last_fb_vc; i++)
2959 set_con2fb_map(i, idx, 0);
2960
2961 if (con_is_bound(&fb_con)) {
2962 printk(KERN_INFO "fbcon: Remapping primary device, "
2963 "fb%i, to tty %i-%i\n", idx,
2964 first_fb_vc + 1, last_fb_vc + 1);
2965 info_idx = idx;
2966 }
2967 console_unlock();
2968 }
2969
2970 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
fbcon_select_primary(struct fb_info * info)2971 static void fbcon_select_primary(struct fb_info *info)
2972 {
2973 if (!map_override && primary_device == -1 &&
2974 video_is_primary_device(info->device)) {
2975 int i;
2976
2977 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
2978 info->fix.id, info->node);
2979 primary_device = info->node;
2980
2981 for (i = first_fb_vc; i <= last_fb_vc; i++)
2982 con2fb_map_boot[i] = primary_device;
2983
2984 if (con_is_bound(&fb_con)) {
2985 printk(KERN_INFO "fbcon: Remapping primary device, "
2986 "fb%i, to tty %i-%i\n", info->node,
2987 first_fb_vc + 1, last_fb_vc + 1);
2988 info_idx = primary_device;
2989 }
2990 }
2991
2992 }
2993 #else
fbcon_select_primary(struct fb_info * info)2994 static inline void fbcon_select_primary(struct fb_info *info)
2995 {
2996 return;
2997 }
2998 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
2999
3000 static bool lockless_register_fb;
3001 module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400);
3002 MODULE_PARM_DESC(lockless_register_fb,
3003 "Lockless framebuffer registration for debugging [default=off]");
3004
3005 /* called with console_lock held */
do_fb_registered(struct fb_info * info)3006 static int do_fb_registered(struct fb_info *info)
3007 {
3008 int ret = 0, i, idx;
3009
3010 WARN_CONSOLE_UNLOCKED();
3011
3012 fbcon_registered_fb[info->node] = info;
3013 fbcon_num_registered_fb++;
3014
3015 idx = info->node;
3016 fbcon_select_primary(info);
3017
3018 if (deferred_takeover) {
3019 pr_info("fbcon: Deferring console take-over\n");
3020 return 0;
3021 }
3022
3023 if (info_idx == -1) {
3024 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3025 if (con2fb_map_boot[i] == idx) {
3026 info_idx = idx;
3027 break;
3028 }
3029 }
3030
3031 if (info_idx != -1)
3032 ret = do_fbcon_takeover(1);
3033 } else {
3034 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3035 if (con2fb_map_boot[i] == idx)
3036 set_con2fb_map(i, idx, 0);
3037 }
3038 }
3039
3040 /* Set the fb info for vga_switcheroo clients. Does nothing otherwise. */
3041 if (info->device && dev_is_pci(info->device))
3042 vga_switcheroo_client_fb_set(to_pci_dev(info->device), info);
3043
3044 return ret;
3045 }
3046
fbcon_fb_registered(struct fb_info * info)3047 int fbcon_fb_registered(struct fb_info *info)
3048 {
3049 int ret;
3050
3051 if (!lockless_register_fb)
3052 console_lock();
3053 else
3054 atomic_inc(&ignore_console_lock_warning);
3055
3056 ret = do_fb_registered(info);
3057
3058 if (!lockless_register_fb)
3059 console_unlock();
3060 else
3061 atomic_dec(&ignore_console_lock_warning);
3062
3063 return ret;
3064 }
3065
fbcon_fb_blanked(struct fb_info * info,int blank)3066 void fbcon_fb_blanked(struct fb_info *info, int blank)
3067 {
3068 struct fbcon_ops *ops = info->fbcon_par;
3069 struct vc_data *vc;
3070
3071 if (!ops || ops->currcon < 0)
3072 return;
3073
3074 vc = vc_cons[ops->currcon].d;
3075 if (vc->vc_mode != KD_TEXT ||
3076 fbcon_info_from_console(ops->currcon) != info)
3077 return;
3078
3079 if (con_is_visible(vc)) {
3080 if (blank)
3081 do_blank_screen(0);
3082 else
3083 do_unblank_screen(0);
3084 }
3085 ops->blank_state = blank;
3086 }
3087
fbcon_new_modelist(struct fb_info * info)3088 void fbcon_new_modelist(struct fb_info *info)
3089 {
3090 int i;
3091 struct vc_data *vc;
3092 struct fb_var_screeninfo var;
3093 const struct fb_videomode *mode;
3094
3095 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3096 if (fbcon_info_from_console(i) != info)
3097 continue;
3098 if (!fb_display[i].mode)
3099 continue;
3100 vc = vc_cons[i].d;
3101 display_to_var(&var, &fb_display[i]);
3102 mode = fb_find_nearest_mode(fb_display[i].mode,
3103 &info->modelist);
3104 fb_videomode_to_var(&var, mode);
3105 fbcon_set_disp(info, &var, vc->vc_num);
3106 }
3107 }
3108
fbcon_get_requirement(struct fb_info * info,struct fb_blit_caps * caps)3109 void fbcon_get_requirement(struct fb_info *info,
3110 struct fb_blit_caps *caps)
3111 {
3112 struct vc_data *vc;
3113
3114 if (caps->flags) {
3115 int i, charcnt;
3116
3117 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3118 vc = vc_cons[i].d;
3119 if (vc && vc->vc_mode == KD_TEXT &&
3120 info->node == con2fb_map[i]) {
3121 set_bit(vc->vc_font.width - 1, caps->x);
3122 set_bit(vc->vc_font.height - 1, caps->y);
3123 charcnt = vc->vc_font.charcount;
3124 if (caps->len < charcnt)
3125 caps->len = charcnt;
3126 }
3127 }
3128 } else {
3129 vc = vc_cons[fg_console].d;
3130
3131 if (vc && vc->vc_mode == KD_TEXT &&
3132 info->node == con2fb_map[fg_console]) {
3133 bitmap_zero(caps->x, FB_MAX_BLIT_WIDTH);
3134 set_bit(vc->vc_font.width - 1, caps->x);
3135 bitmap_zero(caps->y, FB_MAX_BLIT_HEIGHT);
3136 set_bit(vc->vc_font.height - 1, caps->y);
3137 caps->len = vc->vc_font.charcount;
3138 }
3139 }
3140 }
3141
fbcon_set_con2fb_map_ioctl(void __user * argp)3142 int fbcon_set_con2fb_map_ioctl(void __user *argp)
3143 {
3144 struct fb_con2fbmap con2fb;
3145 int ret;
3146
3147 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3148 return -EFAULT;
3149 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3150 return -EINVAL;
3151 if (con2fb.framebuffer >= FB_MAX)
3152 return -EINVAL;
3153 if (!fbcon_registered_fb[con2fb.framebuffer])
3154 request_module("fb%d", con2fb.framebuffer);
3155 if (!fbcon_registered_fb[con2fb.framebuffer]) {
3156 return -EINVAL;
3157 }
3158
3159 console_lock();
3160 ret = set_con2fb_map(con2fb.console - 1,
3161 con2fb.framebuffer, 1);
3162 console_unlock();
3163
3164 return ret;
3165 }
3166
fbcon_get_con2fb_map_ioctl(void __user * argp)3167 int fbcon_get_con2fb_map_ioctl(void __user *argp)
3168 {
3169 struct fb_con2fbmap con2fb;
3170
3171 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3172 return -EFAULT;
3173 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3174 return -EINVAL;
3175
3176 console_lock();
3177 con2fb.framebuffer = con2fb_map[con2fb.console - 1];
3178 console_unlock();
3179
3180 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
3181 }
3182
3183 /*
3184 * The console `switch' structure for the frame buffer based console
3185 */
3186
3187 static const struct consw fb_con = {
3188 .owner = THIS_MODULE,
3189 .con_startup = fbcon_startup,
3190 .con_init = fbcon_init,
3191 .con_deinit = fbcon_deinit,
3192 .con_clear = fbcon_clear,
3193 .con_putcs = fbcon_putcs,
3194 .con_cursor = fbcon_cursor,
3195 .con_scroll = fbcon_scroll,
3196 .con_switch = fbcon_switch,
3197 .con_blank = fbcon_blank,
3198 .con_font_set = fbcon_set_font,
3199 .con_font_get = fbcon_get_font,
3200 .con_font_default = fbcon_set_def_font,
3201 .con_set_palette = fbcon_set_palette,
3202 .con_invert_region = fbcon_invert_region,
3203 .con_resize = fbcon_resize,
3204 .con_debug_enter = fbcon_debug_enter,
3205 .con_debug_leave = fbcon_debug_leave,
3206 };
3207
rotate_store(struct device * device,struct device_attribute * attr,const char * buf,size_t count)3208 static ssize_t rotate_store(struct device *device,
3209 struct device_attribute *attr, const char *buf,
3210 size_t count)
3211 {
3212 struct fb_info *info;
3213 int rotate, idx;
3214 char **last = NULL;
3215
3216 console_lock();
3217 idx = con2fb_map[fg_console];
3218
3219 if (idx == -1 || fbcon_registered_fb[idx] == NULL)
3220 goto err;
3221
3222 info = fbcon_registered_fb[idx];
3223 rotate = simple_strtoul(buf, last, 0);
3224 fbcon_rotate(info, rotate);
3225 err:
3226 console_unlock();
3227 return count;
3228 }
3229
rotate_all_store(struct device * device,struct device_attribute * attr,const char * buf,size_t count)3230 static ssize_t rotate_all_store(struct device *device,
3231 struct device_attribute *attr,const char *buf,
3232 size_t count)
3233 {
3234 struct fb_info *info;
3235 int rotate, idx;
3236 char **last = NULL;
3237
3238 console_lock();
3239 idx = con2fb_map[fg_console];
3240
3241 if (idx == -1 || fbcon_registered_fb[idx] == NULL)
3242 goto err;
3243
3244 info = fbcon_registered_fb[idx];
3245 rotate = simple_strtoul(buf, last, 0);
3246 fbcon_rotate_all(info, rotate);
3247 err:
3248 console_unlock();
3249 return count;
3250 }
3251
rotate_show(struct device * device,struct device_attribute * attr,char * buf)3252 static ssize_t rotate_show(struct device *device,
3253 struct device_attribute *attr,char *buf)
3254 {
3255 struct fb_info *info;
3256 int rotate = 0, idx;
3257
3258 console_lock();
3259 idx = con2fb_map[fg_console];
3260
3261 if (idx == -1 || fbcon_registered_fb[idx] == NULL)
3262 goto err;
3263
3264 info = fbcon_registered_fb[idx];
3265 rotate = fbcon_get_rotate(info);
3266 err:
3267 console_unlock();
3268 return sysfs_emit(buf, "%d\n", rotate);
3269 }
3270
cursor_blink_show(struct device * device,struct device_attribute * attr,char * buf)3271 static ssize_t cursor_blink_show(struct device *device,
3272 struct device_attribute *attr, char *buf)
3273 {
3274 struct fb_info *info;
3275 struct fbcon_ops *ops;
3276 int idx, blink = -1;
3277
3278 console_lock();
3279 idx = con2fb_map[fg_console];
3280
3281 if (idx == -1 || fbcon_registered_fb[idx] == NULL)
3282 goto err;
3283
3284 info = fbcon_registered_fb[idx];
3285 ops = info->fbcon_par;
3286
3287 if (!ops)
3288 goto err;
3289
3290 blink = delayed_work_pending(&ops->cursor_work);
3291 err:
3292 console_unlock();
3293 return sysfs_emit(buf, "%d\n", blink);
3294 }
3295
cursor_blink_store(struct device * device,struct device_attribute * attr,const char * buf,size_t count)3296 static ssize_t cursor_blink_store(struct device *device,
3297 struct device_attribute *attr,
3298 const char *buf, size_t count)
3299 {
3300 struct fb_info *info;
3301 char **last = NULL;
3302 bool blink;
3303 int idx;
3304
3305 console_lock();
3306 idx = con2fb_map[fg_console];
3307
3308 if (idx == -1 || fbcon_registered_fb[idx] == NULL)
3309 goto err;
3310
3311 info = fbcon_registered_fb[idx];
3312
3313 if (!info->fbcon_par)
3314 goto err;
3315
3316 blink = simple_strtoul(buf, last, 0);
3317
3318 if (blink) {
3319 fbcon_cursor_blink = true;
3320 fbcon_add_cursor_work(info);
3321 } else {
3322 fbcon_cursor_blink = false;
3323 fbcon_del_cursor_work(info);
3324 }
3325
3326 err:
3327 console_unlock();
3328 return count;
3329 }
3330
3331 static DEVICE_ATTR_RW(cursor_blink);
3332 static DEVICE_ATTR_RW(rotate);
3333 static DEVICE_ATTR_WO(rotate_all);
3334
3335 static struct attribute *fbcon_device_attrs[] = {
3336 &dev_attr_cursor_blink.attr,
3337 &dev_attr_rotate.attr,
3338 &dev_attr_rotate_all.attr,
3339 NULL
3340 };
3341
3342 ATTRIBUTE_GROUPS(fbcon_device);
3343
3344 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
fbcon_register_existing_fbs(struct work_struct * work)3345 static void fbcon_register_existing_fbs(struct work_struct *work)
3346 {
3347 int i;
3348
3349 console_lock();
3350
3351 deferred_takeover = false;
3352 logo_shown = FBCON_LOGO_DONTSHOW;
3353
3354 fbcon_for_each_registered_fb(i)
3355 do_fb_registered(fbcon_registered_fb[i]);
3356
3357 console_unlock();
3358 }
3359
3360 static struct notifier_block fbcon_output_nb;
3361 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs);
3362
fbcon_output_notifier(struct notifier_block * nb,unsigned long action,void * data)3363 static int fbcon_output_notifier(struct notifier_block *nb,
3364 unsigned long action, void *data)
3365 {
3366 WARN_CONSOLE_UNLOCKED();
3367
3368 pr_info("fbcon: Taking over console\n");
3369
3370 dummycon_unregister_output_notifier(&fbcon_output_nb);
3371
3372 /* We may get called in atomic context */
3373 schedule_work(&fbcon_deferred_takeover_work);
3374
3375 return NOTIFY_OK;
3376 }
3377 #endif
3378
fbcon_start(void)3379 static void fbcon_start(void)
3380 {
3381 WARN_CONSOLE_UNLOCKED();
3382
3383 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3384 if (conswitchp != &dummy_con)
3385 deferred_takeover = false;
3386
3387 if (deferred_takeover) {
3388 fbcon_output_nb.notifier_call = fbcon_output_notifier;
3389 dummycon_register_output_notifier(&fbcon_output_nb);
3390 return;
3391 }
3392 #endif
3393 }
3394
fb_console_init(void)3395 void __init fb_console_init(void)
3396 {
3397 int i;
3398
3399 console_lock();
3400 fbcon_device = device_create_with_groups(fb_class, NULL,
3401 MKDEV(0, 0), NULL,
3402 fbcon_device_groups, "fbcon");
3403
3404 if (IS_ERR(fbcon_device)) {
3405 printk(KERN_WARNING "Unable to create device "
3406 "for fbcon; errno = %ld\n",
3407 PTR_ERR(fbcon_device));
3408 fbcon_device = NULL;
3409 }
3410
3411 for (i = 0; i < MAX_NR_CONSOLES; i++)
3412 con2fb_map[i] = -1;
3413
3414 fbcon_start();
3415 console_unlock();
3416 }
3417
3418 #ifdef MODULE
3419
fb_console_exit(void)3420 void __exit fb_console_exit(void)
3421 {
3422 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3423 console_lock();
3424 if (deferred_takeover)
3425 dummycon_unregister_output_notifier(&fbcon_output_nb);
3426 console_unlock();
3427
3428 cancel_work_sync(&fbcon_deferred_takeover_work);
3429 #endif
3430
3431 console_lock();
3432 device_destroy(fb_class, MKDEV(0, 0));
3433
3434 do_unregister_con_driver(&fb_con);
3435 console_unlock();
3436 }
3437 #endif
3438