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