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