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fbcon.c
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linux-6.19.14/drivers/video/fbdev/core/fbcon.c
1/* 2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver 3 * 4 * Copyright (C) 1995 Geert Uytterhoeven 5 * 6 * 7 * This file is based on the original Amiga console driver (amicon.c): 8 * 9 * Copyright (C) 1993 Hamish Macdonald 10 * Greg Harp 11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk] 12 * 13 * with work by William Rucklidge (wjr@cs.cornell.edu) 14 * Geert Uytterhoeven 15 * Jes Sorensen (jds@kom.auc.dk) 16 * Martin Apel 17 * 18 * and on the original Atari console driver (atacon.c): 19 * 20 * Copyright (C) 1993 Bjoern Brauel 21 * Roman Hodek 22 * 23 * with work by Guenther Kelleter 24 * Martin Schaller 25 * Andreas Schwab 26 * 27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org) 28 * Smart redraw scrolling, arbitrary font width support, 512char font support 29 * and software scrollback added by 30 * Jakub Jelinek (jj@ultra.linux.cz) 31 * 32 * Random hacking by Martin Mares <mj@ucw.cz> 33 * 34 * 2001 - Documented with DocBook 35 * - Brad Douglas <brad@neruo.com> 36 * 37 * The low level operations for the various display memory organizations are 38 * now in separate source files. 39 * 40 * Currently the following organizations are supported: 41 * 42 * o afb Amiga bitplanes 43 * o cfb{2,4,8,16,24,32} Packed pixels 44 * o ilbm Amiga interleaved bitplanes 45 * o iplan2p[248] Atari interleaved bitplanes 46 * o mfb Monochrome 47 * o vga VGA characters/attributes 48 * 49 * To do: 50 * 51 * - Implement 16 plane mode (iplan2p16) 52 * 53 * 54 * This file is subject to the terms and conditions of the GNU General Public 55 * License. See the file COPYING in the main directory of this archive for 56 * more details. 57 */ 58 59#include <linux/export.h> 60#include <linux/module.h> 61#include <linux/types.h> 62#include <linux/fs.h> 63#include <linux/kernel.h> 64#include <linux/delay.h> /* MSch: for IRQ probe */ 65#include <linux/console.h> 66#include <linux/string.h> 67#include <linux/kd.h> 68#include <linux/panic.h> 69#include <linux/pci.h> 70#include <linux/printk.h> 71#include <linux/slab.h> 72#include <linux/fb.h> 73#include <linux/fbcon.h> 74#include <linux/vt_kern.h> 75#include <linux/selection.h> 76#include <linux/font.h> 77#include <linux/smp.h> 78#include <linux/init.h> 79#include <linux/interrupt.h> 80#include <linux/crc32.h> /* For counting font checksums */ 81#include <linux/uaccess.h> 82#include <linux/vga_switcheroo.h> 83#include <asm/irq.h> 84 85#include "fbcon.h" 86#include "fbcon_rotate.h" 87#include "fb_internal.h" 88 89/* 90 * FIXME: Locking 91 * 92 * - fbcon state itself is protected by the console_lock, and the code does a 93 * pretty good job at making sure that lock is held everywhere it's needed. 94 * 95 * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it 96 * means concurrent access to the same fbdev from both fbcon and userspace 97 * will blow up. To fix this all fbcon calls from fbmem.c need to be moved out 98 * of fb_lock/unlock protected sections, since otherwise we'll recurse and 99 * deadlock eventually. Aside: Due to these deadlock issues the fbdev code in 100 * fbmem.c cannot use locking asserts, and there's lots of callers which get 101 * the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too. 102 */ 103 104enum { 105 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */ 106 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */ 107 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */ 108}; 109 110static struct fbcon_display fb_display[MAX_NR_CONSOLES]; 111 112static struct fb_info *fbcon_registered_fb[FB_MAX]; 113static int fbcon_num_registered_fb; 114 115#define fbcon_for_each_registered_fb(i) \ 116 for (i = 0; WARN_CONSOLE_UNLOCKED(), i < FB_MAX; i++) \ 117 if (!fbcon_registered_fb[i]) {} else 118 119static signed char con2fb_map[MAX_NR_CONSOLES]; 120static signed char con2fb_map_boot[MAX_NR_CONSOLES]; 121 122static struct fb_info *fbcon_info_from_console(int console) 123{ 124 signed char fb; 125 WARN_CONSOLE_UNLOCKED(); 126 127 fb = con2fb_map[console]; 128 if (fb < 0 || fb >= ARRAY_SIZE(fbcon_registered_fb)) 129 return NULL; 130 131 return fbcon_registered_fb[fb]; 132} 133 134static int logo_lines; 135/* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO 136 enums. */ 137static int logo_shown = FBCON_LOGO_CANSHOW; 138/* console mappings */ 139static unsigned int first_fb_vc; 140static unsigned int last_fb_vc = MAX_NR_CONSOLES - 1; 141static bool fbcon_is_default = true; 142static int primary_device = -1; 143static bool fbcon_has_console_bind; 144 145#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 146static int map_override; 147 148static inline void fbcon_map_override(void) 149{ 150 map_override = 1; 151} 152#else 153static inline void fbcon_map_override(void) 154{ 155} 156#endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */ 157 158#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 159static bool deferred_takeover = true; 160#else 161#define deferred_takeover false 162#endif 163 164/* font data */ 165static char fontname[40]; 166 167/* current fb_info */ 168static int info_idx = -1; 169 170/* console rotation */ 171static int initial_rotation = -1; 172static int margin_color; 173 174static const struct consw fb_con; 175 176#define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row) 177 178static bool fbcon_cursor_blink = true; 179 180#define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1) 181 182/* 183 * Interface used by the world 184 */ 185 186static void fbcon_clear_margins(struct vc_data *vc, int bottom_only); 187static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table); 188 189/* 190 * Internal routines 191 */ 192static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 193 int unit); 194static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 195 int line, int count, int dy); 196static void fbcon_modechanged(struct fb_info *info); 197static void fbcon_set_all_vcs(struct fb_info *info); 198 199static struct device *fbcon_device; 200 201#ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION 202static inline void fbcon_set_rotation(struct fb_info *info) 203{ 204 struct fbcon_par *par = info->fbcon_par; 205 206 if (!(info->flags & FBINFO_MISC_TILEBLITTING) && 207 par->p->con_rotate < 4) 208 par->rotate = par->p->con_rotate; 209 else 210 par->rotate = 0; 211} 212 213static void fbcon_rotate(struct fb_info *info, u32 rotate) 214{ 215 struct fbcon_par *par = info->fbcon_par; 216 struct fb_info *fb_info; 217 218 if (!par || par->currcon == -1) 219 return; 220 221 fb_info = fbcon_info_from_console(par->currcon); 222 223 if (info == fb_info) { 224 struct fbcon_display *p = &fb_display[par->currcon]; 225 226 if (rotate < 4) 227 p->con_rotate = rotate; 228 else 229 p->con_rotate = 0; 230 231 fbcon_modechanged(info); 232 } 233} 234 235static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 236{ 237 struct fbcon_par *par = info->fbcon_par; 238 struct vc_data *vc; 239 struct fbcon_display *p; 240 int i; 241 242 if (!par || par->currcon < 0 || rotate > 3) 243 return; 244 245 for (i = first_fb_vc; i <= last_fb_vc; i++) { 246 vc = vc_cons[i].d; 247 if (!vc || vc->vc_mode != KD_TEXT || 248 fbcon_info_from_console(i) != info) 249 continue; 250 251 p = &fb_display[vc->vc_num]; 252 p->con_rotate = rotate; 253 } 254 255 fbcon_set_all_vcs(info); 256} 257#else 258static inline void fbcon_set_rotation(struct fb_info *info) 259{ 260 struct fbcon_par *par = info->fbcon_par; 261 262 par->rotate = FB_ROTATE_UR; 263} 264 265static void fbcon_rotate(struct fb_info *info, u32 rotate) 266{ 267 return; 268} 269 270static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 271{ 272 return; 273} 274#endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */ 275 276static void fbcon_set_bitops(struct fbcon_par *par) 277{ 278 switch (par->rotate) { 279 default: 280 fallthrough; 281 case FB_ROTATE_UR: 282 fbcon_set_bitops_ur(par); 283 break; 284 case FB_ROTATE_CW: 285 fbcon_set_bitops_cw(par); 286 break; 287 case FB_ROTATE_UD: 288 fbcon_set_bitops_ud(par); 289 break; 290 case FB_ROTATE_CCW: 291 fbcon_set_bitops_ccw(par); 292 break; 293 } 294} 295 296static int fbcon_get_rotate(struct fb_info *info) 297{ 298 struct fbcon_par *par = info->fbcon_par; 299 300 return (par) ? par->rotate : 0; 301} 302 303static bool fbcon_skip_panic(struct fb_info *info) 304{ 305 return (info->skip_panic && unlikely(panic_in_progress())); 306} 307 308static inline bool fbcon_is_active(struct vc_data *vc, struct fb_info *info) 309{ 310 struct fbcon_par *par = info->fbcon_par; 311 312 return info->state == FBINFO_STATE_RUNNING && 313 vc->vc_mode == KD_TEXT && !par->graphics && !fbcon_skip_panic(info); 314} 315 316static int get_color(struct vc_data *vc, struct fb_info *info, 317 u16 c, bool is_fg) 318{ 319 int depth = fb_get_color_depth(&info->var, &info->fix); 320 int color = 0; 321 322 if (console_blanked) { 323 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 324 325 c = vc->vc_video_erase_char & charmask; 326 } 327 328 if (depth != 1) 329 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c) 330 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c); 331 332 switch (depth) { 333 case 1: 334 { 335 int col = mono_col(info); 336 /* 0 or 1 */ 337 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0; 338 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col; 339 340 if (console_blanked) 341 fg = bg; 342 343 color = (is_fg) ? fg : bg; 344 break; 345 } 346 case 2: 347 /* 348 * Scale down 16-colors to 4 colors. Default 4-color palette 349 * is grayscale. However, simply dividing the values by 4 350 * will not work, as colors 1, 2 and 3 will be scaled-down 351 * to zero rendering them invisible. So empirically convert 352 * colors to a sane 4-level grayscale. 353 */ 354 switch (color) { 355 case 0: 356 color = 0; /* black */ 357 break; 358 case 1 ... 6: 359 color = 2; /* white */ 360 break; 361 case 7 ... 8: 362 color = 1; /* gray */ 363 break; 364 default: 365 color = 3; /* intense white */ 366 break; 367 } 368 break; 369 case 3: 370 /* 371 * Last 8 entries of default 16-color palette is a more intense 372 * version of the first 8 (i.e., same chrominance, different 373 * luminance). 374 */ 375 color &= 7; 376 break; 377 } 378 379 380 return color; 381} 382 383static int get_fg_color(struct vc_data *vc, struct fb_info *info, u16 c) 384{ 385 return get_color(vc, info, c, true); 386} 387 388static int get_bg_color(struct vc_data *vc, struct fb_info *info, u16 c) 389{ 390 return get_color(vc, info, c, false); 391} 392 393static void fb_flashcursor(struct work_struct *work) 394{ 395 struct fbcon_par *par = container_of(work, struct fbcon_par, cursor_work.work); 396 struct fb_info *info; 397 struct vc_data *vc = NULL; 398 int c; 399 bool enable; 400 int ret; 401 402 /* FIXME: we should sort out the unbind locking instead */ 403 /* instead we just fail to flash the cursor if we can't get 404 * the lock instead of blocking fbcon deinit */ 405 ret = console_trylock(); 406 if (ret == 0) 407 return; 408 409 /* protected by console_lock */ 410 info = par->info; 411 412 if (par->currcon != -1) 413 vc = vc_cons[par->currcon].d; 414 415 if (!vc || !con_is_visible(vc) || 416 fbcon_info_from_console(vc->vc_num) != info || 417 vc->vc_deccm != 1) { 418 console_unlock(); 419 return; 420 } 421 422 c = scr_readw((u16 *) vc->vc_pos); 423 enable = par->cursor_flash && !par->cursor_state.enable; 424 par->bitops->cursor(vc, info, enable, 425 get_fg_color(vc, info, c), 426 get_bg_color(vc, info, c)); 427 console_unlock(); 428 429 queue_delayed_work(system_power_efficient_wq, &par->cursor_work, 430 par->cur_blink_jiffies); 431} 432 433static void fbcon_add_cursor_work(struct fb_info *info) 434{ 435 struct fbcon_par *par = info->fbcon_par; 436 437 if (fbcon_cursor_blink) 438 queue_delayed_work(system_power_efficient_wq, &par->cursor_work, 439 par->cur_blink_jiffies); 440} 441 442static void fbcon_del_cursor_work(struct fb_info *info) 443{ 444 struct fbcon_par *par = info->fbcon_par; 445 446 cancel_delayed_work_sync(&par->cursor_work); 447} 448 449#ifndef MODULE 450static int __init fb_console_setup(char *this_opt) 451{ 452 char *options; 453 int i, j; 454 455 if (!this_opt || !*this_opt) 456 return 1; 457 458 while ((options = strsep(&this_opt, ",")) != NULL) { 459 if (!strncmp(options, "font:", 5)) { 460 strscpy(fontname, options + 5, sizeof(fontname)); 461 continue; 462 } 463 464 if (!strncmp(options, "scrollback:", 11)) { 465 pr_warn("Ignoring scrollback size option\n"); 466 continue; 467 } 468 469 if (!strncmp(options, "map:", 4)) { 470 options += 4; 471 if (*options) { 472 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) { 473 if (!options[j]) 474 j = 0; 475 con2fb_map_boot[i] = 476 (options[j++]-'0') % FB_MAX; 477 } 478 479 fbcon_map_override(); 480 } 481 continue; 482 } 483 484 if (!strncmp(options, "vc:", 3)) { 485 options += 3; 486 if (*options) 487 first_fb_vc = simple_strtoul(options, &options, 10) - 1; 488 if (first_fb_vc >= MAX_NR_CONSOLES) 489 first_fb_vc = 0; 490 if (*options++ == '-') 491 last_fb_vc = simple_strtoul(options, &options, 10) - 1; 492 if (last_fb_vc < first_fb_vc || last_fb_vc >= MAX_NR_CONSOLES) 493 last_fb_vc = MAX_NR_CONSOLES - 1; 494 fbcon_is_default = false; 495 continue; 496 } 497 498 if (!strncmp(options, "rotate:", 7)) { 499 options += 7; 500 if (*options) 501 initial_rotation = simple_strtoul(options, &options, 0); 502 if (initial_rotation > 3) 503 initial_rotation = 0; 504 continue; 505 } 506 507 if (!strncmp(options, "margin:", 7)) { 508 options += 7; 509 if (*options) 510 margin_color = simple_strtoul(options, &options, 0); 511 continue; 512 } 513#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 514 if (!strcmp(options, "nodefer")) { 515 deferred_takeover = false; 516 continue; 517 } 518#endif 519 520#ifdef CONFIG_LOGO 521 if (!strncmp(options, "logo-pos:", 9)) { 522 options += 9; 523 if (!strcmp(options, "center")) 524 fb_center_logo = true; 525 continue; 526 } 527 528 if (!strncmp(options, "logo-count:", 11)) { 529 options += 11; 530 if (*options) 531 fb_logo_count = simple_strtol(options, &options, 0); 532 continue; 533 } 534#endif 535 } 536 return 1; 537} 538 539__setup("fbcon=", fb_console_setup); 540#endif 541 542static int search_fb_in_map(int idx) 543{ 544 int i, retval = 0; 545 546 for (i = first_fb_vc; i <= last_fb_vc; i++) { 547 if (con2fb_map[i] == idx) { 548 retval = 1; 549 break; 550 } 551 } 552 return retval; 553} 554 555static int search_for_mapped_con(void) 556{ 557 int i, retval = 0; 558 559 for (i = first_fb_vc; i <= last_fb_vc; i++) { 560 if (con2fb_map[i] != -1) { 561 retval = 1; 562 break; 563 } 564 } 565 return retval; 566} 567 568static int do_fbcon_takeover(int show_logo) 569{ 570 int err, i; 571 572 if (!fbcon_num_registered_fb) 573 return -ENODEV; 574 575 if (!show_logo) 576 logo_shown = FBCON_LOGO_DONTSHOW; 577 578 for (i = first_fb_vc; i <= last_fb_vc; i++) 579 con2fb_map[i] = info_idx; 580 581 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc, 582 fbcon_is_default); 583 584 if (err) { 585 for (i = first_fb_vc; i <= last_fb_vc; i++) 586 con2fb_map[i] = -1; 587 info_idx = -1; 588 } else { 589 fbcon_has_console_bind = true; 590 } 591 592 return err; 593} 594 595#ifdef MODULE 596static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 597 int cols, int rows, int new_cols, int new_rows) 598{ 599 logo_shown = FBCON_LOGO_DONTSHOW; 600} 601#else 602static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 603 int cols, int rows, int new_cols, int new_rows) 604{ 605 /* Need to make room for the logo */ 606 struct fbcon_par *par = info->fbcon_par; 607 int cnt, erase = vc->vc_video_erase_char, step; 608 unsigned short *save = NULL, *r, *q; 609 int logo_height; 610 611 if (info->fbops->owner) { 612 logo_shown = FBCON_LOGO_DONTSHOW; 613 return; 614 } 615 616 /* 617 * remove underline attribute from erase character 618 * if black and white framebuffer. 619 */ 620 if (fb_get_color_depth(&info->var, &info->fix) == 1) 621 erase &= ~0x400; 622 logo_height = fb_prepare_logo(info, par->rotate); 623 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height); 624 q = (unsigned short *) (vc->vc_origin + 625 vc->vc_size_row * rows); 626 step = logo_lines * cols; 627 for (r = q - logo_lines * cols; r < q; r++) 628 if (scr_readw(r) != vc->vc_video_erase_char) 629 break; 630 if (r != q && new_rows >= rows + logo_lines) { 631 save = kmalloc(array3_size(logo_lines, new_cols, 2), 632 GFP_KERNEL); 633 if (save) { 634 int i = min(cols, new_cols); 635 scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2)); 636 r = q - step; 637 for (cnt = 0; cnt < logo_lines; cnt++, r += i) 638 scr_memcpyw(save + cnt * new_cols, r, 2 * i); 639 r = q; 640 } 641 } 642 if (r == q) { 643 /* We can scroll screen down */ 644 r = q - step - cols; 645 for (cnt = rows - logo_lines; cnt > 0; cnt--) { 646 scr_memcpyw(r + step, r, vc->vc_size_row); 647 r -= cols; 648 } 649 if (!save) { 650 int lines; 651 if (vc->state.y + logo_lines >= rows) 652 lines = rows - vc->state.y - 1; 653 else 654 lines = logo_lines; 655 vc->state.y += lines; 656 vc->vc_pos += lines * vc->vc_size_row; 657 } 658 } 659 scr_memsetw((unsigned short *) vc->vc_origin, 660 erase, 661 vc->vc_size_row * logo_lines); 662 663 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 664 fbcon_clear_margins(vc, 0); 665 update_screen(vc); 666 } 667 668 if (save) { 669 q = (unsigned short *) (vc->vc_origin + 670 vc->vc_size_row * 671 rows); 672 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2)); 673 vc->state.y += logo_lines; 674 vc->vc_pos += logo_lines * vc->vc_size_row; 675 kfree(save); 676 } 677 678 if (logo_shown == FBCON_LOGO_DONTSHOW) 679 return; 680 681 if (logo_lines > vc->vc_bottom) { 682 logo_shown = FBCON_LOGO_CANSHOW; 683 pr_info("fbcon: disable boot-logo (boot-logo bigger than screen).\n"); 684 } else { 685 logo_shown = FBCON_LOGO_DRAW; 686 vc->vc_top = logo_lines; 687 } 688} 689#endif /* MODULE */ 690 691#ifdef CONFIG_FB_TILEBLITTING 692static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 693{ 694 struct fbcon_par *par = info->fbcon_par; 695 696 par->p = &fb_display[vc->vc_num]; 697 698 if ((info->flags & FBINFO_MISC_TILEBLITTING)) 699 fbcon_set_tileops(vc, info); 700 else { 701 fbcon_set_rotation(info); 702 fbcon_set_bitops(par); 703 } 704} 705 706static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 707{ 708 int err = 0; 709 710 if (info->flags & FBINFO_MISC_TILEBLITTING && 711 info->tileops->fb_get_tilemax(info) < charcount) 712 err = 1; 713 714 return err; 715} 716#else 717static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 718{ 719 struct fbcon_par *par = info->fbcon_par; 720 721 info->flags &= ~FBINFO_MISC_TILEBLITTING; 722 par->p = &fb_display[vc->vc_num]; 723 fbcon_set_rotation(info); 724 fbcon_set_bitops(par); 725} 726 727static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 728{ 729 return 0; 730} 731 732#endif /* CONFIG_MISC_TILEBLITTING */ 733 734static void fbcon_release(struct fb_info *info) 735{ 736 lock_fb_info(info); 737 if (info->fbops->fb_release) 738 info->fbops->fb_release(info, 0); 739 unlock_fb_info(info); 740 741 module_put(info->fbops->owner); 742 743 if (info->fbcon_par) { 744 struct fbcon_par *par = info->fbcon_par; 745 746 fbcon_del_cursor_work(info); 747 kfree(par->cursor_state.mask); 748 kfree(par->cursor_data); 749 kfree(par->cursor_src); 750 kfree(par->fontbuffer); 751 kfree(info->fbcon_par); 752 info->fbcon_par = NULL; 753 } 754} 755 756static int fbcon_open(struct fb_info *info) 757{ 758 struct fbcon_par *par; 759 760 if (!try_module_get(info->fbops->owner)) 761 return -ENODEV; 762 763 lock_fb_info(info); 764 if (info->fbops->fb_open && 765 info->fbops->fb_open(info, 0)) { 766 unlock_fb_info(info); 767 module_put(info->fbops->owner); 768 return -ENODEV; 769 } 770 unlock_fb_info(info); 771 772 par = kzalloc(sizeof(*par), GFP_KERNEL); 773 if (!par) { 774 fbcon_release(info); 775 return -ENOMEM; 776 } 777 778 INIT_DELAYED_WORK(&par->cursor_work, fb_flashcursor); 779 par->info = info; 780 info->fbcon_par = par; 781 par->cur_blink_jiffies = HZ / 5; 782 783 return 0; 784} 785 786static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info, 787 int unit) 788{ 789 int err; 790 791 err = fbcon_open(info); 792 if (err) 793 return err; 794 795 if (vc) 796 set_blitting_type(vc, info); 797 798 return err; 799} 800 801static void con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo, 802 struct fb_info *newinfo) 803{ 804 int ret; 805 806 fbcon_release(oldinfo); 807 808 /* 809 If oldinfo and newinfo are driving the same hardware, 810 the fb_release() method of oldinfo may attempt to 811 restore the hardware state. This will leave the 812 newinfo in an undefined state. Thus, a call to 813 fb_set_par() may be needed for the newinfo. 814 */ 815 if (newinfo && newinfo->fbops->fb_set_par) { 816 ret = newinfo->fbops->fb_set_par(newinfo); 817 818 if (ret) 819 printk(KERN_ERR "con2fb_release_oldinfo: " 820 "detected unhandled fb_set_par error, " 821 "error code %d\n", ret); 822 } 823} 824 825static void con2fb_init_display(struct vc_data *vc, struct fb_info *info, 826 int unit, int show_logo) 827{ 828 struct fbcon_par *par = info->fbcon_par; 829 int ret; 830 831 par->currcon = fg_console; 832 833 if (info->fbops->fb_set_par && !par->initialized) { 834 ret = info->fbops->fb_set_par(info); 835 836 if (ret) 837 printk(KERN_ERR "con2fb_init_display: detected " 838 "unhandled fb_set_par error, " 839 "error code %d\n", ret); 840 } 841 842 par->initialized = true; 843 par->graphics = 0; 844 fbcon_set_disp(info, &info->var, unit); 845 846 if (show_logo) { 847 struct vc_data *fg_vc = vc_cons[fg_console].d; 848 struct fb_info *fg_info = 849 fbcon_info_from_console(fg_console); 850 851 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols, 852 fg_vc->vc_rows, fg_vc->vc_cols, 853 fg_vc->vc_rows); 854 } 855 856 if (fg_console != unit) 857 update_screen(vc_cons[fg_console].d); 858} 859 860/** 861 * set_con2fb_map - map console to frame buffer device 862 * @unit: virtual console number to map 863 * @newidx: frame buffer index to map virtual console to 864 * @user: user request 865 * 866 * Maps a virtual console @unit to a frame buffer device 867 * @newidx. 868 * 869 * This should be called with the console lock held. 870 */ 871static int set_con2fb_map(int unit, int newidx, int user) 872{ 873 struct vc_data *vc = vc_cons[unit].d; 874 int oldidx = con2fb_map[unit]; 875 struct fb_info *info = fbcon_registered_fb[newidx]; 876 struct fb_info *oldinfo = NULL; 877 int err = 0, show_logo; 878 879 WARN_CONSOLE_UNLOCKED(); 880 881 if (oldidx == newidx) 882 return 0; 883 884 if (!info) 885 return -EINVAL; 886 887 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) { 888 info_idx = newidx; 889 return do_fbcon_takeover(0); 890 } 891 892 if (oldidx != -1) 893 oldinfo = fbcon_registered_fb[oldidx]; 894 895 if (!search_fb_in_map(newidx)) { 896 err = con2fb_acquire_newinfo(vc, info, unit); 897 if (err) 898 return err; 899 900 fbcon_add_cursor_work(info); 901 } else if (vc) { 902 set_blitting_type(vc, info); 903 } 904 905 con2fb_map[unit] = newidx; 906 907 /* 908 * If old fb is not mapped to any of the consoles, 909 * fbcon should release it. 910 */ 911 if (oldinfo && !search_fb_in_map(oldidx)) 912 con2fb_release_oldinfo(vc, oldinfo, info); 913 914 show_logo = (fg_console == 0 && !user && 915 logo_shown != FBCON_LOGO_DONTSHOW); 916 917 con2fb_map_boot[unit] = newidx; 918 con2fb_init_display(vc, info, unit, show_logo); 919 920 if (!search_fb_in_map(info_idx)) 921 info_idx = newidx; 922 923 return err; 924} 925 926/* 927 * Low Level Operations 928 */ 929/* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */ 930static int var_to_display(struct fbcon_display *disp, 931 struct fb_var_screeninfo *var, 932 struct fb_info *info) 933{ 934 disp->xres_virtual = var->xres_virtual; 935 disp->yres_virtual = var->yres_virtual; 936 disp->bits_per_pixel = var->bits_per_pixel; 937 disp->grayscale = var->grayscale; 938 disp->nonstd = var->nonstd; 939 disp->accel_flags = var->accel_flags; 940 disp->height = var->height; 941 disp->width = var->width; 942 disp->red = var->red; 943 disp->green = var->green; 944 disp->blue = var->blue; 945 disp->transp = var->transp; 946 disp->rotate = var->rotate; 947 disp->mode = fb_match_mode(var, &info->modelist); 948 if (disp->mode == NULL) 949 /* This should not happen */ 950 return -EINVAL; 951 return 0; 952} 953 954static void display_to_var(struct fb_var_screeninfo *var, 955 struct fbcon_display *disp) 956{ 957 fb_videomode_to_var(var, disp->mode); 958 var->xres_virtual = disp->xres_virtual; 959 var->yres_virtual = disp->yres_virtual; 960 var->bits_per_pixel = disp->bits_per_pixel; 961 var->grayscale = disp->grayscale; 962 var->nonstd = disp->nonstd; 963 var->accel_flags = disp->accel_flags; 964 var->height = disp->height; 965 var->width = disp->width; 966 var->red = disp->red; 967 var->green = disp->green; 968 var->blue = disp->blue; 969 var->transp = disp->transp; 970 var->rotate = disp->rotate; 971} 972 973static const char *fbcon_startup(void) 974{ 975 static const char display_desc[] = "frame buffer device"; 976 struct fbcon_display *p = &fb_display[fg_console]; 977 struct vc_data *vc = vc_cons[fg_console].d; 978 const struct font_desc *font = NULL; 979 struct fb_info *info = NULL; 980 struct fbcon_par *par; 981 int rows, cols; 982 983 /* 984 * If fbcon_num_registered_fb is zero, this is a call for the dummy part. 985 * The frame buffer devices weren't initialized yet. 986 */ 987 if (!fbcon_num_registered_fb || info_idx == -1) 988 return display_desc; 989 /* 990 * Instead of blindly using fbcon_registered_fb[0], we use info_idx, set by 991 * fbcon_fb_registered(); 992 */ 993 info = fbcon_registered_fb[info_idx]; 994 if (!info) 995 return NULL; 996 997 if (fbcon_open(info)) 998 return NULL; 999 1000 par = info->fbcon_par; 1001 par->currcon = -1; 1002 par->graphics = 1; 1003 par->cur_rotate = -1; 1004 1005 p->con_rotate = initial_rotation; 1006 if (p->con_rotate == -1) 1007 p->con_rotate = info->fbcon_rotate_hint; 1008 if (p->con_rotate == -1) 1009 p->con_rotate = FB_ROTATE_UR; 1010 1011 set_blitting_type(vc, info); 1012 1013 /* Setup default font */ 1014 if (!p->fontdata) { 1015 if (!fontname[0] || !(font = find_font(fontname))) 1016 font = get_default_font(info->var.xres, 1017 info->var.yres, 1018 info->pixmap.blit_x, 1019 info->pixmap.blit_y); 1020 vc->vc_font.width = font->width; 1021 vc->vc_font.height = font->height; 1022 vc->vc_font.data = (void *)(p->fontdata = font->data); 1023 vc->vc_font.charcount = font->charcount; 1024 } 1025 1026 cols = FBCON_SWAP(par->rotate, info->var.xres, info->var.yres); 1027 rows = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 1028 cols /= vc->vc_font.width; 1029 rows /= vc->vc_font.height; 1030 vc_resize(vc, cols, rows); 1031 1032 pr_debug("mode: %s\n", info->fix.id); 1033 pr_debug("visual: %d\n", info->fix.visual); 1034 pr_debug("res: %dx%d-%d\n", info->var.xres, 1035 info->var.yres, 1036 info->var.bits_per_pixel); 1037 1038 fbcon_add_cursor_work(info); 1039 return display_desc; 1040} 1041 1042static void fbcon_init(struct vc_data *vc, bool init) 1043{ 1044 struct fb_info *info; 1045 struct fbcon_par *par; 1046 struct vc_data **default_mode = vc->vc_display_fg; 1047 struct vc_data *svc = *default_mode; 1048 struct fbcon_display *t, *p = &fb_display[vc->vc_num]; 1049 int logo = 1, new_rows, new_cols, rows, cols; 1050 int ret; 1051 1052 if (WARN_ON(info_idx == -1)) 1053 return; 1054 1055 if (con2fb_map[vc->vc_num] == -1) 1056 con2fb_map[vc->vc_num] = info_idx; 1057 1058 info = fbcon_info_from_console(vc->vc_num); 1059 1060 if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET) 1061 logo_shown = FBCON_LOGO_DONTSHOW; 1062 1063 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW || 1064 (info->fix.type == FB_TYPE_TEXT)) 1065 logo = 0; 1066 1067 if (var_to_display(p, &info->var, info)) 1068 return; 1069 1070 if (!info->fbcon_par) 1071 if (con2fb_acquire_newinfo(vc, info, vc->vc_num)) 1072 return; 1073 1074 /* If we are not the first console on this 1075 fb, copy the font from that console */ 1076 t = &fb_display[fg_console]; 1077 if (!p->fontdata) { 1078 if (t->fontdata) { 1079 struct vc_data *fvc = vc_cons[fg_console].d; 1080 1081 vc->vc_font.data = (void *)(p->fontdata = 1082 fvc->vc_font.data); 1083 vc->vc_font.width = fvc->vc_font.width; 1084 vc->vc_font.height = fvc->vc_font.height; 1085 vc->vc_font.charcount = fvc->vc_font.charcount; 1086 p->userfont = t->userfont; 1087 1088 if (p->userfont) 1089 REFCOUNT(p->fontdata)++; 1090 } else { 1091 const struct font_desc *font = NULL; 1092 1093 if (!fontname[0] || !(font = find_font(fontname))) 1094 font = get_default_font(info->var.xres, 1095 info->var.yres, 1096 info->pixmap.blit_x, 1097 info->pixmap.blit_y); 1098 vc->vc_font.width = font->width; 1099 vc->vc_font.height = font->height; 1100 vc->vc_font.data = (void *)(p->fontdata = font->data); 1101 vc->vc_font.charcount = font->charcount; 1102 } 1103 } 1104 1105 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1106 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1107 if (vc->vc_font.charcount == 256) { 1108 vc->vc_hi_font_mask = 0; 1109 } else { 1110 vc->vc_hi_font_mask = 0x100; 1111 if (vc->vc_can_do_color) 1112 vc->vc_complement_mask <<= 1; 1113 } 1114 1115 if (!*svc->uni_pagedict_loc) 1116 con_set_default_unimap(svc); 1117 if (!*vc->uni_pagedict_loc) 1118 con_copy_unimap(vc, svc); 1119 1120 par = info->fbcon_par; 1121 par->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1122 1123 p->con_rotate = initial_rotation; 1124 if (p->con_rotate == -1) 1125 p->con_rotate = info->fbcon_rotate_hint; 1126 if (p->con_rotate == -1) 1127 p->con_rotate = FB_ROTATE_UR; 1128 1129 set_blitting_type(vc, info); 1130 1131 cols = vc->vc_cols; 1132 rows = vc->vc_rows; 1133 new_cols = FBCON_SWAP(par->rotate, info->var.xres, info->var.yres); 1134 new_rows = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 1135 new_cols /= vc->vc_font.width; 1136 new_rows /= vc->vc_font.height; 1137 1138 /* 1139 * We must always set the mode. The mode of the previous console 1140 * driver could be in the same resolution but we are using different 1141 * hardware so we have to initialize the hardware. 1142 * 1143 * We need to do it in fbcon_init() to prevent screen corruption. 1144 */ 1145 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 1146 if (info->fbops->fb_set_par && !par->initialized) { 1147 ret = info->fbops->fb_set_par(info); 1148 1149 if (ret) 1150 printk(KERN_ERR "fbcon_init: detected " 1151 "unhandled fb_set_par error, " 1152 "error code %d\n", ret); 1153 } 1154 1155 par->initialized = true; 1156 } 1157 1158 par->graphics = 0; 1159 1160#ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION 1161 if ((info->flags & FBINFO_HWACCEL_COPYAREA) && 1162 !(info->flags & FBINFO_HWACCEL_DISABLED)) 1163 p->scrollmode = SCROLL_MOVE; 1164 else /* default to something safe */ 1165 p->scrollmode = SCROLL_REDRAW; 1166#endif 1167 1168 /* 1169 * ++guenther: console.c:vc_allocate() relies on initializing 1170 * vc_{cols,rows}, but we must not set those if we are only 1171 * resizing the console. 1172 */ 1173 if (init) { 1174 vc->vc_cols = new_cols; 1175 vc->vc_rows = new_rows; 1176 } else 1177 vc_resize(vc, new_cols, new_rows); 1178 1179 if (logo) 1180 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows); 1181 1182 if (par->bitops->rotate_font && par->bitops->rotate_font(info, vc)) { 1183 par->rotate = FB_ROTATE_UR; 1184 set_blitting_type(vc, info); 1185 } 1186 1187 par->p = &fb_display[fg_console]; 1188} 1189 1190static void fbcon_free_font(struct fbcon_display *p) 1191{ 1192 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0)) 1193 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int)); 1194 p->fontdata = NULL; 1195 p->userfont = 0; 1196} 1197 1198static void set_vc_hi_font(struct vc_data *vc, bool set); 1199 1200static void fbcon_release_all(void) 1201{ 1202 struct fb_info *info; 1203 int i, j, mapped; 1204 1205 fbcon_for_each_registered_fb(i) { 1206 mapped = 0; 1207 info = fbcon_registered_fb[i]; 1208 1209 for (j = first_fb_vc; j <= last_fb_vc; j++) { 1210 if (con2fb_map[j] == i) { 1211 mapped = 1; 1212 con2fb_map[j] = -1; 1213 } 1214 } 1215 1216 if (mapped) 1217 fbcon_release(info); 1218 } 1219} 1220 1221static void fbcon_deinit(struct vc_data *vc) 1222{ 1223 struct fbcon_display *p = &fb_display[vc->vc_num]; 1224 struct fb_info *info; 1225 struct fbcon_par *par; 1226 int idx; 1227 1228 fbcon_free_font(p); 1229 idx = con2fb_map[vc->vc_num]; 1230 1231 if (idx == -1) 1232 goto finished; 1233 1234 info = fbcon_registered_fb[idx]; 1235 1236 if (!info) 1237 goto finished; 1238 1239 par = info->fbcon_par; 1240 1241 if (!par) 1242 goto finished; 1243 1244 if (con_is_visible(vc)) 1245 fbcon_del_cursor_work(info); 1246 1247 par->initialized = false; 1248finished: 1249 1250 fbcon_free_font(p); 1251 vc->vc_font.data = NULL; 1252 1253 if (vc->vc_hi_font_mask && vc->vc_screenbuf) 1254 set_vc_hi_font(vc, false); 1255 1256 if (!con_is_bound(&fb_con)) 1257 fbcon_release_all(); 1258 1259 if (vc->vc_num == logo_shown) 1260 logo_shown = FBCON_LOGO_CANSHOW; 1261 1262 return; 1263} 1264 1265/* ====================================================================== */ 1266 1267/* fbcon_XXX routines - interface used by the world 1268 * 1269 * This system is now divided into two levels because of complications 1270 * caused by hardware scrolling. Top level functions: 1271 * 1272 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins() 1273 * 1274 * handles y values in range [0, scr_height-1] that correspond to real 1275 * screen positions. y_wrap shift means that first line of bitmap may be 1276 * anywhere on this display. These functions convert lineoffsets to 1277 * bitmap offsets and deal with the wrap-around case by splitting blits. 1278 * 1279 * fbcon_bmove_physical_8() -- These functions fast implementations 1280 * fbcon_clear_physical_8() -- of original fbcon_XXX fns. 1281 * fbcon_putc_physical_8() -- (font width != 8) may be added later 1282 * 1283 * WARNING: 1284 * 1285 * At the moment fbcon_putc() cannot blit across vertical wrap boundary 1286 * Implies should only really hardware scroll in rows. Only reason for 1287 * restriction is simplicity & efficiency at the moment. 1288 */ 1289 1290static void __fbcon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx, 1291 unsigned int height, unsigned int width) 1292{ 1293 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1294 struct fbcon_par *par = info->fbcon_par; 1295 int fg, bg; 1296 struct fbcon_display *p = &fb_display[vc->vc_num]; 1297 u_int y_break; 1298 1299 if (!fbcon_is_active(vc, info)) 1300 return; 1301 1302 if (!height || !width) 1303 return; 1304 1305 if (sy < vc->vc_top && vc->vc_top == logo_lines) { 1306 vc->vc_top = 0; 1307 /* 1308 * If the font dimensions are not an integral of the display 1309 * dimensions then the par->clear below won't end up clearing 1310 * the margins. Call clear_margins here in case the logo 1311 * bitmap stretched into the margin area. 1312 */ 1313 fbcon_clear_margins(vc, 0); 1314 } 1315 1316 fg = get_color(vc, info, vc->vc_video_erase_char, 1); 1317 bg = get_color(vc, info, vc->vc_video_erase_char, 0); 1318 /* Split blits that cross physical y_wrap boundary */ 1319 1320 y_break = p->vrows - p->yscroll; 1321 if (sy < y_break && sy + height - 1 >= y_break) { 1322 u_int b = y_break - sy; 1323 par->bitops->clear(vc, info, real_y(p, sy), sx, b, width, fg, bg); 1324 par->bitops->clear(vc, info, real_y(p, sy + b), sx, height - b, 1325 width, fg, bg); 1326 } else 1327 par->bitops->clear(vc, info, real_y(p, sy), sx, height, width, fg, bg); 1328} 1329 1330static void fbcon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx, 1331 unsigned int width) 1332{ 1333 __fbcon_clear(vc, sy, sx, 1, width); 1334} 1335 1336static void fbcon_putcs(struct vc_data *vc, const u16 *s, unsigned int count, 1337 unsigned int ypos, unsigned int xpos) 1338{ 1339 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1340 struct fbcon_display *p = &fb_display[vc->vc_num]; 1341 struct fbcon_par *par = info->fbcon_par; 1342 1343 if (fbcon_is_active(vc, info)) 1344 par->bitops->putcs(vc, info, s, count, real_y(p, ypos), xpos, 1345 get_fg_color(vc, info, scr_readw(s)), 1346 get_bg_color(vc, info, scr_readw(s))); 1347} 1348 1349static void fbcon_clear_margins(struct vc_data *vc, int bottom_only) 1350{ 1351 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1352 struct fbcon_par *par = info->fbcon_par; 1353 1354 if (fbcon_is_active(vc, info)) 1355 par->bitops->clear_margins(vc, info, margin_color, bottom_only); 1356} 1357 1358static void fbcon_cursor(struct vc_data *vc, bool enable) 1359{ 1360 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1361 struct fbcon_par *par = info->fbcon_par; 1362 int c = scr_readw((u16 *) vc->vc_pos); 1363 1364 par->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1365 1366 if (!fbcon_is_active(vc, info) || vc->vc_deccm != 1) 1367 return; 1368 1369 if (vc->vc_cursor_type & CUR_SW) 1370 fbcon_del_cursor_work(info); 1371 else 1372 fbcon_add_cursor_work(info); 1373 1374 par->cursor_flash = enable; 1375 1376 if (!par->bitops->cursor) 1377 return; 1378 1379 par->bitops->cursor(vc, info, enable, 1380 get_fg_color(vc, info, c), 1381 get_bg_color(vc, info, c)); 1382} 1383 1384static int scrollback_phys_max = 0; 1385static int scrollback_max = 0; 1386static int scrollback_current = 0; 1387 1388static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 1389 int unit) 1390{ 1391 struct fbcon_display *p, *t; 1392 struct vc_data **default_mode, *vc; 1393 struct vc_data *svc; 1394 struct fbcon_par *par = info->fbcon_par; 1395 int rows, cols; 1396 unsigned long ret = 0; 1397 1398 p = &fb_display[unit]; 1399 1400 if (var_to_display(p, var, info)) 1401 return; 1402 1403 vc = vc_cons[unit].d; 1404 1405 if (!vc) 1406 return; 1407 1408 default_mode = vc->vc_display_fg; 1409 svc = *default_mode; 1410 t = &fb_display[svc->vc_num]; 1411 1412 if (!vc->vc_font.data) { 1413 vc->vc_font.data = (void *)(p->fontdata = t->fontdata); 1414 vc->vc_font.width = (*default_mode)->vc_font.width; 1415 vc->vc_font.height = (*default_mode)->vc_font.height; 1416 vc->vc_font.charcount = (*default_mode)->vc_font.charcount; 1417 p->userfont = t->userfont; 1418 if (p->userfont) 1419 REFCOUNT(p->fontdata)++; 1420 } 1421 1422 var->activate = FB_ACTIVATE_NOW; 1423 info->var.activate = var->activate; 1424 var->yoffset = info->var.yoffset; 1425 var->xoffset = info->var.xoffset; 1426 fb_set_var(info, var); 1427 par->var = info->var; 1428 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1429 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1430 if (vc->vc_font.charcount == 256) { 1431 vc->vc_hi_font_mask = 0; 1432 } else { 1433 vc->vc_hi_font_mask = 0x100; 1434 if (vc->vc_can_do_color) 1435 vc->vc_complement_mask <<= 1; 1436 } 1437 1438 if (!*svc->uni_pagedict_loc) 1439 con_set_default_unimap(svc); 1440 if (!*vc->uni_pagedict_loc) 1441 con_copy_unimap(vc, svc); 1442 1443 cols = FBCON_SWAP(par->rotate, info->var.xres, info->var.yres); 1444 rows = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 1445 cols /= vc->vc_font.width; 1446 rows /= vc->vc_font.height; 1447 ret = vc_resize(vc, cols, rows); 1448 1449 if (con_is_visible(vc) && !ret) 1450 update_screen(vc); 1451} 1452 1453static __inline__ void ywrap_up(struct vc_data *vc, int count) 1454{ 1455 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1456 struct fbcon_par *par = info->fbcon_par; 1457 struct fbcon_display *p = &fb_display[vc->vc_num]; 1458 1459 p->yscroll += count; 1460 if (p->yscroll >= p->vrows) /* Deal with wrap */ 1461 p->yscroll -= p->vrows; 1462 par->var.xoffset = 0; 1463 par->var.yoffset = p->yscroll * vc->vc_font.height; 1464 par->var.vmode |= FB_VMODE_YWRAP; 1465 par->bitops->update_start(info); 1466 scrollback_max += count; 1467 if (scrollback_max > scrollback_phys_max) 1468 scrollback_max = scrollback_phys_max; 1469 scrollback_current = 0; 1470} 1471 1472static __inline__ void ywrap_down(struct vc_data *vc, int count) 1473{ 1474 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1475 struct fbcon_par *par = info->fbcon_par; 1476 struct fbcon_display *p = &fb_display[vc->vc_num]; 1477 1478 p->yscroll -= count; 1479 if (p->yscroll < 0) /* Deal with wrap */ 1480 p->yscroll += p->vrows; 1481 par->var.xoffset = 0; 1482 par->var.yoffset = p->yscroll * vc->vc_font.height; 1483 par->var.vmode |= FB_VMODE_YWRAP; 1484 par->bitops->update_start(info); 1485 scrollback_max -= count; 1486 if (scrollback_max < 0) 1487 scrollback_max = 0; 1488 scrollback_current = 0; 1489} 1490 1491static __inline__ void ypan_up(struct vc_data *vc, int count) 1492{ 1493 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1494 struct fbcon_display *p = &fb_display[vc->vc_num]; 1495 struct fbcon_par *par = info->fbcon_par; 1496 1497 p->yscroll += count; 1498 if (p->yscroll > p->vrows - vc->vc_rows) { 1499 par->bitops->bmove(vc, info, p->vrows - vc->vc_rows, 1500 0, 0, 0, vc->vc_rows, vc->vc_cols); 1501 p->yscroll -= p->vrows - vc->vc_rows; 1502 } 1503 1504 par->var.xoffset = 0; 1505 par->var.yoffset = p->yscroll * vc->vc_font.height; 1506 par->var.vmode &= ~FB_VMODE_YWRAP; 1507 par->bitops->update_start(info); 1508 fbcon_clear_margins(vc, 1); 1509 scrollback_max += count; 1510 if (scrollback_max > scrollback_phys_max) 1511 scrollback_max = scrollback_phys_max; 1512 scrollback_current = 0; 1513} 1514 1515static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count) 1516{ 1517 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1518 struct fbcon_par *par = info->fbcon_par; 1519 struct fbcon_display *p = &fb_display[vc->vc_num]; 1520 1521 p->yscroll += count; 1522 1523 if (p->yscroll > p->vrows - vc->vc_rows) { 1524 p->yscroll -= p->vrows - vc->vc_rows; 1525 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t); 1526 } 1527 1528 par->var.xoffset = 0; 1529 par->var.yoffset = p->yscroll * vc->vc_font.height; 1530 par->var.vmode &= ~FB_VMODE_YWRAP; 1531 par->bitops->update_start(info); 1532 fbcon_clear_margins(vc, 1); 1533 scrollback_max += count; 1534 if (scrollback_max > scrollback_phys_max) 1535 scrollback_max = scrollback_phys_max; 1536 scrollback_current = 0; 1537} 1538 1539static __inline__ void ypan_down(struct vc_data *vc, int count) 1540{ 1541 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1542 struct fbcon_display *p = &fb_display[vc->vc_num]; 1543 struct fbcon_par *par = info->fbcon_par; 1544 1545 p->yscroll -= count; 1546 if (p->yscroll < 0) { 1547 par->bitops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows, 1548 0, vc->vc_rows, vc->vc_cols); 1549 p->yscroll += p->vrows - vc->vc_rows; 1550 } 1551 1552 par->var.xoffset = 0; 1553 par->var.yoffset = p->yscroll * vc->vc_font.height; 1554 par->var.vmode &= ~FB_VMODE_YWRAP; 1555 par->bitops->update_start(info); 1556 fbcon_clear_margins(vc, 1); 1557 scrollback_max -= count; 1558 if (scrollback_max < 0) 1559 scrollback_max = 0; 1560 scrollback_current = 0; 1561} 1562 1563static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count) 1564{ 1565 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1566 struct fbcon_par *par = info->fbcon_par; 1567 struct fbcon_display *p = &fb_display[vc->vc_num]; 1568 1569 p->yscroll -= count; 1570 1571 if (p->yscroll < 0) { 1572 p->yscroll += p->vrows - vc->vc_rows; 1573 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count); 1574 } 1575 1576 par->var.xoffset = 0; 1577 par->var.yoffset = p->yscroll * vc->vc_font.height; 1578 par->var.vmode &= ~FB_VMODE_YWRAP; 1579 par->bitops->update_start(info); 1580 fbcon_clear_margins(vc, 1); 1581 scrollback_max -= count; 1582 if (scrollback_max < 0) 1583 scrollback_max = 0; 1584 scrollback_current = 0; 1585} 1586 1587static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 1588 int line, int count, int dy) 1589{ 1590 unsigned short *s = (unsigned short *) 1591 (vc->vc_origin + vc->vc_size_row * line); 1592 1593 while (count--) { 1594 unsigned short *start = s; 1595 unsigned short *le = advance_row(s, 1); 1596 unsigned short c; 1597 int x = 0; 1598 unsigned short attr = 1; 1599 1600 do { 1601 c = scr_readw(s); 1602 if (attr != (c & 0xff00)) { 1603 attr = c & 0xff00; 1604 if (s > start) { 1605 fbcon_putcs(vc, start, s - start, 1606 dy, x); 1607 x += s - start; 1608 start = s; 1609 } 1610 } 1611 console_conditional_schedule(); 1612 s++; 1613 } while (s < le); 1614 if (s > start) 1615 fbcon_putcs(vc, start, s - start, dy, x); 1616 console_conditional_schedule(); 1617 dy++; 1618 } 1619} 1620 1621static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info, 1622 struct fbcon_display *p, int line, int count, int ycount) 1623{ 1624 int offset = ycount * vc->vc_cols; 1625 unsigned short *d = (unsigned short *) 1626 (vc->vc_origin + vc->vc_size_row * line); 1627 unsigned short *s = d + offset; 1628 struct fbcon_par *par = info->fbcon_par; 1629 1630 while (count--) { 1631 unsigned short *start = s; 1632 unsigned short *le = advance_row(s, 1); 1633 unsigned short c; 1634 int x = 0; 1635 1636 do { 1637 c = scr_readw(s); 1638 1639 if (c == scr_readw(d)) { 1640 if (s > start) { 1641 par->bitops->bmove(vc, info, line + ycount, x, 1642 line, x, 1, s - start); 1643 x += s - start + 1; 1644 start = s + 1; 1645 } else { 1646 x++; 1647 start++; 1648 } 1649 } 1650 1651 scr_writew(c, d); 1652 console_conditional_schedule(); 1653 s++; 1654 d++; 1655 } while (s < le); 1656 if (s > start) 1657 par->bitops->bmove(vc, info, line + ycount, x, line, x, 1, 1658 s - start); 1659 console_conditional_schedule(); 1660 if (ycount > 0) 1661 line++; 1662 else { 1663 line--; 1664 /* NOTE: We subtract two lines from these pointers */ 1665 s -= vc->vc_size_row; 1666 d -= vc->vc_size_row; 1667 } 1668 } 1669} 1670 1671static void fbcon_redraw(struct vc_data *vc, int line, int count, int offset) 1672{ 1673 unsigned short *d = (unsigned short *) 1674 (vc->vc_origin + vc->vc_size_row * line); 1675 unsigned short *s = d + offset; 1676 1677 while (count--) { 1678 unsigned short *start = s; 1679 unsigned short *le = advance_row(s, 1); 1680 unsigned short c; 1681 int x = 0; 1682 unsigned short attr = 1; 1683 1684 do { 1685 c = scr_readw(s); 1686 if (attr != (c & 0xff00)) { 1687 attr = c & 0xff00; 1688 if (s > start) { 1689 fbcon_putcs(vc, start, s - start, 1690 line, x); 1691 x += s - start; 1692 start = s; 1693 } 1694 } 1695 if (c == scr_readw(d)) { 1696 if (s > start) { 1697 fbcon_putcs(vc, start, s - start, 1698 line, x); 1699 x += s - start + 1; 1700 start = s + 1; 1701 } else { 1702 x++; 1703 start++; 1704 } 1705 } 1706 scr_writew(c, d); 1707 console_conditional_schedule(); 1708 s++; 1709 d++; 1710 } while (s < le); 1711 if (s > start) 1712 fbcon_putcs(vc, start, s - start, line, x); 1713 console_conditional_schedule(); 1714 if (offset > 0) 1715 line++; 1716 else { 1717 line--; 1718 /* NOTE: We subtract two lines from these pointers */ 1719 s -= vc->vc_size_row; 1720 d -= vc->vc_size_row; 1721 } 1722 } 1723} 1724 1725static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx, 1726 int dy, int dx, int height, int width, u_int y_break) 1727{ 1728 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1729 struct fbcon_par *par = info->fbcon_par; 1730 u_int b; 1731 1732 if (sy < y_break && sy + height > y_break) { 1733 b = y_break - sy; 1734 if (dy < sy) { /* Avoid trashing self */ 1735 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1736 y_break); 1737 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1738 height - b, width, y_break); 1739 } else { 1740 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1741 height - b, width, y_break); 1742 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1743 y_break); 1744 } 1745 return; 1746 } 1747 1748 if (dy < y_break && dy + height > y_break) { 1749 b = y_break - dy; 1750 if (dy < sy) { /* Avoid trashing self */ 1751 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1752 y_break); 1753 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1754 height - b, width, y_break); 1755 } else { 1756 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1757 height - b, width, y_break); 1758 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1759 y_break); 1760 } 1761 return; 1762 } 1763 par->bitops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx, 1764 height, width); 1765} 1766 1767static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx, 1768 int height, int width) 1769{ 1770 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1771 struct fbcon_display *p = &fb_display[vc->vc_num]; 1772 1773 if (!fbcon_is_active(vc, info)) 1774 return; 1775 1776 if (!width || !height) 1777 return; 1778 1779 /* Split blits that cross physical y_wrap case. 1780 * Pathological case involves 4 blits, better to use recursive 1781 * code rather than unrolled case 1782 * 1783 * Recursive invocations don't need to erase the cursor over and 1784 * over again, so we use fbcon_bmove_rec() 1785 */ 1786 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width, 1787 p->vrows - p->yscroll); 1788} 1789 1790static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b, 1791 enum con_scroll dir, unsigned int count) 1792{ 1793 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1794 struct fbcon_display *p = &fb_display[vc->vc_num]; 1795 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK; 1796 1797 if (!fbcon_is_active(vc, info)) 1798 return true; 1799 1800 fbcon_cursor(vc, false); 1801 1802 /* 1803 * ++Geert: Only use ywrap/ypan if the console is in text mode 1804 * ++Andrew: Only use ypan on hardware text mode when scrolling the 1805 * whole screen (prevents flicker). 1806 */ 1807 1808 switch (dir) { 1809 case SM_UP: 1810 if (count > vc->vc_rows) /* Maximum realistic size */ 1811 count = vc->vc_rows; 1812 switch (fb_scrollmode(p)) { 1813 case SCROLL_MOVE: 1814 fbcon_redraw_blit(vc, info, p, t, b - t - count, 1815 count); 1816 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1817 scr_memsetw((unsigned short *) (vc->vc_origin + 1818 vc->vc_size_row * 1819 (b - count)), 1820 vc->vc_video_erase_char, 1821 vc->vc_size_row * count); 1822 return true; 1823 1824 case SCROLL_WRAP_MOVE: 1825 if (b - t - count > 3 * vc->vc_rows >> 2) { 1826 if (t > 0) 1827 fbcon_bmove(vc, 0, 0, count, 0, t, 1828 vc->vc_cols); 1829 ywrap_up(vc, count); 1830 if (vc->vc_rows - b > 0) 1831 fbcon_bmove(vc, b - count, 0, b, 0, 1832 vc->vc_rows - b, 1833 vc->vc_cols); 1834 } else if (info->flags & FBINFO_READS_FAST) 1835 fbcon_bmove(vc, t + count, 0, t, 0, 1836 b - t - count, vc->vc_cols); 1837 else 1838 goto redraw_up; 1839 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1840 break; 1841 1842 case SCROLL_PAN_REDRAW: 1843 if ((p->yscroll + count <= 1844 2 * (p->vrows - vc->vc_rows)) 1845 && ((!scroll_partial && (b - t == vc->vc_rows)) 1846 || (scroll_partial 1847 && (b - t - count > 1848 3 * vc->vc_rows >> 2)))) { 1849 if (t > 0) 1850 fbcon_redraw_move(vc, p, 0, t, count); 1851 ypan_up_redraw(vc, t, count); 1852 if (vc->vc_rows - b > 0) 1853 fbcon_redraw_move(vc, p, b, 1854 vc->vc_rows - b, b); 1855 } else 1856 fbcon_redraw_move(vc, p, t + count, b - t - count, t); 1857 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1858 break; 1859 1860 case SCROLL_PAN_MOVE: 1861 if ((p->yscroll + count <= 1862 2 * (p->vrows - vc->vc_rows)) 1863 && ((!scroll_partial && (b - t == vc->vc_rows)) 1864 || (scroll_partial 1865 && (b - t - count > 1866 3 * vc->vc_rows >> 2)))) { 1867 if (t > 0) 1868 fbcon_bmove(vc, 0, 0, count, 0, t, 1869 vc->vc_cols); 1870 ypan_up(vc, count); 1871 if (vc->vc_rows - b > 0) 1872 fbcon_bmove(vc, b - count, 0, b, 0, 1873 vc->vc_rows - b, 1874 vc->vc_cols); 1875 } else if (info->flags & FBINFO_READS_FAST) 1876 fbcon_bmove(vc, t + count, 0, t, 0, 1877 b - t - count, vc->vc_cols); 1878 else 1879 goto redraw_up; 1880 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1881 break; 1882 1883 case SCROLL_REDRAW: 1884 redraw_up: 1885 fbcon_redraw(vc, t, b - t - count, 1886 count * vc->vc_cols); 1887 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1888 scr_memsetw((unsigned short *) (vc->vc_origin + 1889 vc->vc_size_row * 1890 (b - count)), 1891 vc->vc_video_erase_char, 1892 vc->vc_size_row * count); 1893 return true; 1894 } 1895 break; 1896 1897 case SM_DOWN: 1898 if (count > vc->vc_rows) /* Maximum realistic size */ 1899 count = vc->vc_rows; 1900 switch (fb_scrollmode(p)) { 1901 case SCROLL_MOVE: 1902 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count, 1903 -count); 1904 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1905 scr_memsetw((unsigned short *) (vc->vc_origin + 1906 vc->vc_size_row * 1907 t), 1908 vc->vc_video_erase_char, 1909 vc->vc_size_row * count); 1910 return true; 1911 1912 case SCROLL_WRAP_MOVE: 1913 if (b - t - count > 3 * vc->vc_rows >> 2) { 1914 if (vc->vc_rows - b > 0) 1915 fbcon_bmove(vc, b, 0, b - count, 0, 1916 vc->vc_rows - b, 1917 vc->vc_cols); 1918 ywrap_down(vc, count); 1919 if (t > 0) 1920 fbcon_bmove(vc, count, 0, 0, 0, t, 1921 vc->vc_cols); 1922 } else if (info->flags & FBINFO_READS_FAST) 1923 fbcon_bmove(vc, t, 0, t + count, 0, 1924 b - t - count, vc->vc_cols); 1925 else 1926 goto redraw_down; 1927 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1928 break; 1929 1930 case SCROLL_PAN_MOVE: 1931 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1932 && ((!scroll_partial && (b - t == vc->vc_rows)) 1933 || (scroll_partial 1934 && (b - t - count > 1935 3 * vc->vc_rows >> 2)))) { 1936 if (vc->vc_rows - b > 0) 1937 fbcon_bmove(vc, b, 0, b - count, 0, 1938 vc->vc_rows - b, 1939 vc->vc_cols); 1940 ypan_down(vc, count); 1941 if (t > 0) 1942 fbcon_bmove(vc, count, 0, 0, 0, t, 1943 vc->vc_cols); 1944 } else if (info->flags & FBINFO_READS_FAST) 1945 fbcon_bmove(vc, t, 0, t + count, 0, 1946 b - t - count, vc->vc_cols); 1947 else 1948 goto redraw_down; 1949 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1950 break; 1951 1952 case SCROLL_PAN_REDRAW: 1953 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1954 && ((!scroll_partial && (b - t == vc->vc_rows)) 1955 || (scroll_partial 1956 && (b - t - count > 1957 3 * vc->vc_rows >> 2)))) { 1958 if (vc->vc_rows - b > 0) 1959 fbcon_redraw_move(vc, p, b, vc->vc_rows - b, 1960 b - count); 1961 ypan_down_redraw(vc, t, count); 1962 if (t > 0) 1963 fbcon_redraw_move(vc, p, count, t, 0); 1964 } else 1965 fbcon_redraw_move(vc, p, t, b - t - count, t + count); 1966 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1967 break; 1968 1969 case SCROLL_REDRAW: 1970 redraw_down: 1971 fbcon_redraw(vc, b - 1, b - t - count, 1972 -count * vc->vc_cols); 1973 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1974 scr_memsetw((unsigned short *) (vc->vc_origin + 1975 vc->vc_size_row * 1976 t), 1977 vc->vc_video_erase_char, 1978 vc->vc_size_row * count); 1979 return true; 1980 } 1981 } 1982 return false; 1983} 1984 1985 1986static void updatescrollmode_accel(struct fbcon_display *p, 1987 struct fb_info *info, 1988 struct vc_data *vc) 1989{ 1990#ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION 1991 struct fbcon_par *par = info->fbcon_par; 1992 int cap = info->flags; 1993 u16 t = 0; 1994 int ypan = FBCON_SWAP(par->rotate, info->fix.ypanstep, info->fix.xpanstep); 1995 int ywrap = FBCON_SWAP(par->rotate, info->fix.ywrapstep, t); 1996 int yres = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 1997 int vyres = FBCON_SWAP(par->rotate, info->var.yres_virtual, info->var.xres_virtual); 1998 int good_pan = (cap & FBINFO_HWACCEL_YPAN) && 1999 divides(ypan, vc->vc_font.height) && vyres > yres; 2000 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) && 2001 divides(ywrap, vc->vc_font.height) && 2002 divides(vc->vc_font.height, vyres) && 2003 divides(vc->vc_font.height, yres); 2004 int reading_fast = cap & FBINFO_READS_FAST; 2005 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) && 2006 !(cap & FBINFO_HWACCEL_DISABLED); 2007 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) && 2008 !(cap & FBINFO_HWACCEL_DISABLED); 2009 2010 if (good_wrap || good_pan) { 2011 if (reading_fast || fast_copyarea) 2012 p->scrollmode = good_wrap ? 2013 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE; 2014 else 2015 p->scrollmode = good_wrap ? SCROLL_REDRAW : 2016 SCROLL_PAN_REDRAW; 2017 } else { 2018 if (reading_fast || (fast_copyarea && !fast_imageblit)) 2019 p->scrollmode = SCROLL_MOVE; 2020 else 2021 p->scrollmode = SCROLL_REDRAW; 2022 } 2023#endif 2024} 2025 2026static void updatescrollmode(struct fbcon_display *p, 2027 struct fb_info *info, 2028 struct vc_data *vc) 2029{ 2030 struct fbcon_par *par = info->fbcon_par; 2031 int fh = vc->vc_font.height; 2032 int yres = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 2033 int vyres = FBCON_SWAP(par->rotate, info->var.yres_virtual, info->var.xres_virtual); 2034 2035 p->vrows = vyres/fh; 2036 if (yres > (fh * (vc->vc_rows + 1))) 2037 p->vrows -= (yres - (fh * vc->vc_rows)) / fh; 2038 if ((yres % fh) && (vyres % fh < yres % fh)) 2039 p->vrows--; 2040 2041 /* update scrollmode in case hardware acceleration is used */ 2042 updatescrollmode_accel(p, info, vc); 2043} 2044 2045#define PITCH(w) (((w) + 7) >> 3) 2046#define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */ 2047 2048static int fbcon_resize(struct vc_data *vc, unsigned int width, 2049 unsigned int height, bool from_user) 2050{ 2051 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2052 struct fbcon_par *par = info->fbcon_par; 2053 struct fbcon_display *p = &fb_display[vc->vc_num]; 2054 struct fb_var_screeninfo var = info->var; 2055 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh; 2056 2057 if (p->userfont && FNTSIZE(vc->vc_font.data)) { 2058 int size; 2059 int pitch = PITCH(vc->vc_font.width); 2060 2061 /* 2062 * If user font, ensure that a possible change to user font 2063 * height or width will not allow a font data out-of-bounds access. 2064 * NOTE: must use original charcount in calculation as font 2065 * charcount can change and cannot be used to determine the 2066 * font data allocated size. 2067 */ 2068 if (pitch <= 0) 2069 return -EINVAL; 2070 size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount); 2071 if (size > FNTSIZE(vc->vc_font.data)) 2072 return -EINVAL; 2073 } 2074 2075 virt_w = FBCON_SWAP(par->rotate, width, height); 2076 virt_h = FBCON_SWAP(par->rotate, height, width); 2077 virt_fw = FBCON_SWAP(par->rotate, vc->vc_font.width, vc->vc_font.height); 2078 virt_fh = FBCON_SWAP(par->rotate, vc->vc_font.height, vc->vc_font.width); 2079 var.xres = virt_w * virt_fw; 2080 var.yres = virt_h * virt_fh; 2081 x_diff = info->var.xres - var.xres; 2082 y_diff = info->var.yres - var.yres; 2083 if (x_diff < 0 || x_diff > virt_fw || 2084 y_diff < 0 || y_diff > virt_fh) { 2085 const struct fb_videomode *mode; 2086 2087 pr_debug("attempting resize %ix%i\n", var.xres, var.yres); 2088 mode = fb_find_best_mode(&var, &info->modelist); 2089 if (mode == NULL) 2090 return -EINVAL; 2091 display_to_var(&var, p); 2092 fb_videomode_to_var(&var, mode); 2093 2094 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh) 2095 return -EINVAL; 2096 2097 pr_debug("resize now %ix%i\n", var.xres, var.yres); 2098 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 2099 var.activate = FB_ACTIVATE_NOW | 2100 FB_ACTIVATE_FORCE; 2101 fb_set_var(info, &var); 2102 } 2103 var_to_display(p, &info->var, info); 2104 par->var = info->var; 2105 } 2106 updatescrollmode(p, info, vc); 2107 return 0; 2108} 2109 2110static bool fbcon_switch(struct vc_data *vc) 2111{ 2112 struct fb_info *info, *old_info = NULL; 2113 struct fbcon_par *par; 2114 struct fbcon_display *p = &fb_display[vc->vc_num]; 2115 struct fb_var_screeninfo var; 2116 int i, ret, prev_console; 2117 2118 info = fbcon_info_from_console(vc->vc_num); 2119 par = info->fbcon_par; 2120 2121 if (logo_shown >= 0) { 2122 struct vc_data *conp2 = vc_cons[logo_shown].d; 2123 2124 if (conp2->vc_top == logo_lines 2125 && conp2->vc_bottom == conp2->vc_rows) 2126 conp2->vc_top = 0; 2127 logo_shown = FBCON_LOGO_CANSHOW; 2128 } 2129 2130 prev_console = par->currcon; 2131 if (prev_console != -1) 2132 old_info = fbcon_info_from_console(prev_console); 2133 /* 2134 * FIXME: If we have multiple fbdev's loaded, we need to 2135 * update all info->currcon. Perhaps, we can place this 2136 * in a centralized structure, but this might break some 2137 * drivers. 2138 * 2139 * info->currcon = vc->vc_num; 2140 */ 2141 fbcon_for_each_registered_fb(i) { 2142 if (fbcon_registered_fb[i]->fbcon_par) { 2143 struct fbcon_par *par = fbcon_registered_fb[i]->fbcon_par; 2144 2145 par->currcon = vc->vc_num; 2146 } 2147 } 2148 memset(&var, 0, sizeof(struct fb_var_screeninfo)); 2149 display_to_var(&var, p); 2150 var.activate = FB_ACTIVATE_NOW; 2151 2152 /* 2153 * make sure we don't unnecessarily trip the memcmp() 2154 * in fb_set_var() 2155 */ 2156 info->var.activate = var.activate; 2157 var.vmode |= info->var.vmode & ~FB_VMODE_MASK; 2158 fb_set_var(info, &var); 2159 par->var = info->var; 2160 2161 if (old_info != NULL && (old_info != info || 2162 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) { 2163 if (info->fbops->fb_set_par) { 2164 ret = info->fbops->fb_set_par(info); 2165 2166 if (ret) 2167 printk(KERN_ERR "fbcon_switch: detected " 2168 "unhandled fb_set_par error, " 2169 "error code %d\n", ret); 2170 } 2171 2172 if (old_info != info) 2173 fbcon_del_cursor_work(old_info); 2174 } 2175 2176 if (!fbcon_is_active(vc, info) || par->blank_state != FB_BLANK_UNBLANK) 2177 fbcon_del_cursor_work(info); 2178 else 2179 fbcon_add_cursor_work(info); 2180 2181 set_blitting_type(vc, info); 2182 par->cursor_reset = 1; 2183 2184 if (par->bitops->rotate_font && par->bitops->rotate_font(info, vc)) { 2185 par->rotate = FB_ROTATE_UR; 2186 set_blitting_type(vc, info); 2187 } 2188 2189 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 2190 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 2191 2192 if (vc->vc_font.charcount > 256) 2193 vc->vc_complement_mask <<= 1; 2194 2195 updatescrollmode(p, info, vc); 2196 2197 switch (fb_scrollmode(p)) { 2198 case SCROLL_WRAP_MOVE: 2199 scrollback_phys_max = p->vrows - vc->vc_rows; 2200 break; 2201 case SCROLL_PAN_MOVE: 2202 case SCROLL_PAN_REDRAW: 2203 scrollback_phys_max = p->vrows - 2 * vc->vc_rows; 2204 if (scrollback_phys_max < 0) 2205 scrollback_phys_max = 0; 2206 break; 2207 default: 2208 scrollback_phys_max = 0; 2209 break; 2210 } 2211 2212 scrollback_max = 0; 2213 scrollback_current = 0; 2214 2215 if (fbcon_is_active(vc, info)) { 2216 par->var.xoffset = par->var.yoffset = p->yscroll = 0; 2217 par->bitops->update_start(info); 2218 } 2219 2220 fbcon_set_palette(vc, color_table); 2221 fbcon_clear_margins(vc, 0); 2222 2223 if (logo_shown == FBCON_LOGO_DRAW) { 2224 2225 logo_shown = fg_console; 2226 fb_show_logo(info, par->rotate); 2227 update_region(vc, 2228 vc->vc_origin + vc->vc_size_row * vc->vc_top, 2229 vc->vc_size_row * (vc->vc_bottom - 2230 vc->vc_top) / 2); 2231 return false; 2232 } 2233 return true; 2234} 2235 2236static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info, 2237 int blank) 2238{ 2239 if (blank) { 2240 unsigned short charmask = vc->vc_hi_font_mask ? 2241 0x1ff : 0xff; 2242 unsigned short oldc; 2243 2244 oldc = vc->vc_video_erase_char; 2245 vc->vc_video_erase_char &= charmask; 2246 __fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols); 2247 vc->vc_video_erase_char = oldc; 2248 } 2249} 2250 2251static bool fbcon_blank(struct vc_data *vc, enum vesa_blank_mode blank, 2252 bool mode_switch) 2253{ 2254 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2255 struct fbcon_par *par = info->fbcon_par; 2256 2257 if (mode_switch) { 2258 struct fb_var_screeninfo var = info->var; 2259 2260 par->graphics = 1; 2261 2262 if (!blank) { 2263 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE | 2264 FB_ACTIVATE_KD_TEXT; 2265 fb_set_var(info, &var); 2266 par->graphics = 0; 2267 par->var = info->var; 2268 } 2269 } 2270 2271 if (fbcon_is_active(vc, info)) { 2272 if (par->blank_state != blank) { 2273 par->blank_state = blank; 2274 fbcon_cursor(vc, !blank); 2275 par->cursor_flash = (!blank); 2276 2277 if (fb_blank(info, blank)) 2278 fbcon_generic_blank(vc, info, blank); 2279 } 2280 2281 if (!blank) 2282 update_screen(vc); 2283 } 2284 2285 if (mode_switch || !fbcon_is_active(vc, info) || par->blank_state != FB_BLANK_UNBLANK) 2286 fbcon_del_cursor_work(info); 2287 else 2288 fbcon_add_cursor_work(info); 2289 2290 return false; 2291} 2292 2293static void fbcon_debug_enter(struct vc_data *vc) 2294{ 2295 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2296 struct fbcon_par *par = info->fbcon_par; 2297 2298 par->save_graphics = par->graphics; 2299 par->graphics = 0; 2300 if (info->fbops->fb_debug_enter) 2301 info->fbops->fb_debug_enter(info); 2302 fbcon_set_palette(vc, color_table); 2303} 2304 2305static void fbcon_debug_leave(struct vc_data *vc) 2306{ 2307 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2308 struct fbcon_par *par = info->fbcon_par; 2309 2310 par->graphics = par->save_graphics; 2311 if (info->fbops->fb_debug_leave) 2312 info->fbops->fb_debug_leave(info); 2313} 2314 2315static int fbcon_get_font(struct vc_data *vc, struct console_font *font, unsigned int vpitch) 2316{ 2317 u8 *fontdata = vc->vc_font.data; 2318 u8 *data = font->data; 2319 int i, j; 2320 2321 font->width = vc->vc_font.width; 2322 font->height = vc->vc_font.height; 2323 if (font->height > vpitch) 2324 return -ENOSPC; 2325 font->charcount = vc->vc_hi_font_mask ? 512 : 256; 2326 if (!font->data) 2327 return 0; 2328 2329 if (font->width <= 8) { 2330 j = vc->vc_font.height; 2331 if (font->charcount * j > FNTSIZE(fontdata)) 2332 return -EINVAL; 2333 2334 for (i = 0; i < font->charcount; i++) { 2335 memcpy(data, fontdata, j); 2336 memset(data + j, 0, vpitch - j); 2337 data += vpitch; 2338 fontdata += j; 2339 } 2340 } else if (font->width <= 16) { 2341 j = vc->vc_font.height * 2; 2342 if (font->charcount * j > FNTSIZE(fontdata)) 2343 return -EINVAL; 2344 2345 for (i = 0; i < font->charcount; i++) { 2346 memcpy(data, fontdata, j); 2347 memset(data + j, 0, 2*vpitch - j); 2348 data += 2*vpitch; 2349 fontdata += j; 2350 } 2351 } else if (font->width <= 24) { 2352 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata)) 2353 return -EINVAL; 2354 2355 for (i = 0; i < font->charcount; i++) { 2356 for (j = 0; j < vc->vc_font.height; j++) { 2357 *data++ = fontdata[0]; 2358 *data++ = fontdata[1]; 2359 *data++ = fontdata[2]; 2360 fontdata += sizeof(u32); 2361 } 2362 memset(data, 0, 3 * (vpitch - j)); 2363 data += 3 * (vpitch - j); 2364 } 2365 } else { 2366 j = vc->vc_font.height * 4; 2367 if (font->charcount * j > FNTSIZE(fontdata)) 2368 return -EINVAL; 2369 2370 for (i = 0; i < font->charcount; i++) { 2371 memcpy(data, fontdata, j); 2372 memset(data + j, 0, 4 * vpitch - j); 2373 data += 4 * vpitch; 2374 fontdata += j; 2375 } 2376 } 2377 return 0; 2378} 2379 2380/* set/clear vc_hi_font_mask and update vc attrs accordingly */ 2381static void set_vc_hi_font(struct vc_data *vc, bool set) 2382{ 2383 if (!set) { 2384 vc->vc_hi_font_mask = 0; 2385 if (vc->vc_can_do_color) { 2386 vc->vc_complement_mask >>= 1; 2387 vc->vc_s_complement_mask >>= 1; 2388 } 2389 2390 /* ++Edmund: reorder the attribute bits */ 2391 if (vc->vc_can_do_color) { 2392 unsigned short *cp = 2393 (unsigned short *) vc->vc_origin; 2394 int count = vc->vc_screenbuf_size / 2; 2395 unsigned short c; 2396 for (; count > 0; count--, cp++) { 2397 c = scr_readw(cp); 2398 scr_writew(((c & 0xfe00) >> 1) | 2399 (c & 0xff), cp); 2400 } 2401 c = vc->vc_video_erase_char; 2402 vc->vc_video_erase_char = 2403 ((c & 0xfe00) >> 1) | (c & 0xff); 2404 vc->vc_attr >>= 1; 2405 } 2406 } else { 2407 vc->vc_hi_font_mask = 0x100; 2408 if (vc->vc_can_do_color) { 2409 vc->vc_complement_mask <<= 1; 2410 vc->vc_s_complement_mask <<= 1; 2411 } 2412 2413 /* ++Edmund: reorder the attribute bits */ 2414 { 2415 unsigned short *cp = 2416 (unsigned short *) vc->vc_origin; 2417 int count = vc->vc_screenbuf_size / 2; 2418 unsigned short c; 2419 for (; count > 0; count--, cp++) { 2420 unsigned short newc; 2421 c = scr_readw(cp); 2422 if (vc->vc_can_do_color) 2423 newc = 2424 ((c & 0xff00) << 1) | (c & 2425 0xff); 2426 else 2427 newc = c & ~0x100; 2428 scr_writew(newc, cp); 2429 } 2430 c = vc->vc_video_erase_char; 2431 if (vc->vc_can_do_color) { 2432 vc->vc_video_erase_char = 2433 ((c & 0xff00) << 1) | (c & 0xff); 2434 vc->vc_attr <<= 1; 2435 } else 2436 vc->vc_video_erase_char = c & ~0x100; 2437 } 2438 } 2439} 2440 2441static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount, 2442 const u8 * data, int userfont) 2443{ 2444 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2445 struct fbcon_par *par = info->fbcon_par; 2446 struct fbcon_display *p = &fb_display[vc->vc_num]; 2447 int resize, ret, old_userfont, old_width, old_height, old_charcount; 2448 u8 *old_data = vc->vc_font.data; 2449 2450 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height); 2451 vc->vc_font.data = (void *)(p->fontdata = data); 2452 old_userfont = p->userfont; 2453 if ((p->userfont = userfont)) 2454 REFCOUNT(data)++; 2455 2456 old_width = vc->vc_font.width; 2457 old_height = vc->vc_font.height; 2458 old_charcount = vc->vc_font.charcount; 2459 2460 vc->vc_font.width = w; 2461 vc->vc_font.height = h; 2462 vc->vc_font.charcount = charcount; 2463 if (vc->vc_hi_font_mask && charcount == 256) 2464 set_vc_hi_font(vc, false); 2465 else if (!vc->vc_hi_font_mask && charcount == 512) 2466 set_vc_hi_font(vc, true); 2467 2468 if (resize) { 2469 int cols, rows; 2470 2471 cols = FBCON_SWAP(par->rotate, info->var.xres, info->var.yres); 2472 rows = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 2473 cols /= w; 2474 rows /= h; 2475 ret = vc_resize(vc, cols, rows); 2476 if (ret) 2477 goto err_out; 2478 } else if (con_is_visible(vc) 2479 && vc->vc_mode == KD_TEXT) { 2480 fbcon_clear_margins(vc, 0); 2481 update_screen(vc); 2482 } 2483 2484 if (old_userfont && (--REFCOUNT(old_data) == 0)) 2485 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int)); 2486 return 0; 2487 2488err_out: 2489 p->fontdata = old_data; 2490 vc->vc_font.data = old_data; 2491 2492 if (userfont) { 2493 p->userfont = old_userfont; 2494 if (--REFCOUNT(data) == 0) 2495 kfree(data - FONT_EXTRA_WORDS * sizeof(int)); 2496 } 2497 2498 vc->vc_font.width = old_width; 2499 vc->vc_font.height = old_height; 2500 vc->vc_font.charcount = old_charcount; 2501 2502 return ret; 2503} 2504 2505/* 2506 * User asked to set font; we are guaranteed that charcount does not exceed 512 2507 * but lets not assume that, since charcount of 512 is small for unicode support. 2508 */ 2509 2510static int fbcon_set_font(struct vc_data *vc, const struct console_font *font, 2511 unsigned int vpitch, unsigned int flags) 2512{ 2513 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2514 unsigned charcount = font->charcount; 2515 int w = font->width; 2516 int h = font->height; 2517 int size, alloc_size; 2518 int i, csum; 2519 u8 *new_data, *data = font->data; 2520 int pitch = PITCH(font->width); 2521 2522 /* Is there a reason why fbconsole couldn't handle any charcount >256? 2523 * If not this check should be changed to charcount < 256 */ 2524 if (charcount != 256 && charcount != 512) 2525 return -EINVAL; 2526 2527 /* font bigger than screen resolution ? */ 2528 if (w > FBCON_SWAP(info->var.rotate, info->var.xres, info->var.yres) || 2529 h > FBCON_SWAP(info->var.rotate, info->var.yres, info->var.xres)) 2530 return -EINVAL; 2531 2532 if (font->width > FB_MAX_BLIT_WIDTH || font->height > FB_MAX_BLIT_HEIGHT) 2533 return -EINVAL; 2534 2535 /* Make sure drawing engine can handle the font */ 2536 if (!test_bit(font->width - 1, info->pixmap.blit_x) || 2537 !test_bit(font->height - 1, info->pixmap.blit_y)) 2538 return -EINVAL; 2539 2540 /* Make sure driver can handle the font length */ 2541 if (fbcon_invalid_charcount(info, charcount)) 2542 return -EINVAL; 2543 2544 /* Check for integer overflow in font size calculation */ 2545 if (check_mul_overflow(h, pitch, &size) || 2546 check_mul_overflow(size, charcount, &size)) 2547 return -EINVAL; 2548 2549 /* Check for overflow in allocation size calculation */ 2550 if (check_add_overflow(FONT_EXTRA_WORDS * sizeof(int), size, &alloc_size)) 2551 return -EINVAL; 2552 2553 new_data = kmalloc(alloc_size, GFP_USER); 2554 2555 if (!new_data) 2556 return -ENOMEM; 2557 2558 memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int)); 2559 2560 new_data += FONT_EXTRA_WORDS * sizeof(int); 2561 FNTSIZE(new_data) = size; 2562 REFCOUNT(new_data) = 0; /* usage counter */ 2563 for (i=0; i< charcount; i++) { 2564 memcpy(new_data + i*h*pitch, data + i*vpitch*pitch, h*pitch); 2565 } 2566 2567 /* Since linux has a nice crc32 function use it for counting font 2568 * checksums. */ 2569 csum = crc32(0, new_data, size); 2570 2571 FNTSUM(new_data) = csum; 2572 /* Check if the same font is on some other console already */ 2573 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2574 struct vc_data *tmp = vc_cons[i].d; 2575 2576 if (fb_display[i].userfont && 2577 fb_display[i].fontdata && 2578 FNTSUM(fb_display[i].fontdata) == csum && 2579 FNTSIZE(fb_display[i].fontdata) == size && 2580 tmp->vc_font.width == w && 2581 !memcmp(fb_display[i].fontdata, new_data, size)) { 2582 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int)); 2583 new_data = (u8 *)fb_display[i].fontdata; 2584 break; 2585 } 2586 } 2587 return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1); 2588} 2589 2590static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, 2591 const char *name) 2592{ 2593 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2594 const struct font_desc *f; 2595 2596 if (!name) 2597 f = get_default_font(info->var.xres, info->var.yres, 2598 info->pixmap.blit_x, info->pixmap.blit_y); 2599 else if (!(f = find_font(name))) 2600 return -ENOENT; 2601 2602 font->width = f->width; 2603 font->height = f->height; 2604 return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0); 2605} 2606 2607static u16 palette_red[16]; 2608static u16 palette_green[16]; 2609static u16 palette_blue[16]; 2610 2611static struct fb_cmap palette_cmap = { 2612 0, 16, palette_red, palette_green, palette_blue, NULL 2613}; 2614 2615static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table) 2616{ 2617 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2618 int i, j, k, depth; 2619 u8 val; 2620 2621 if (!fbcon_is_active(vc, info)) 2622 return; 2623 2624 if (!con_is_visible(vc)) 2625 return; 2626 2627 depth = fb_get_color_depth(&info->var, &info->fix); 2628 if (depth > 3) { 2629 for (i = j = 0; i < 16; i++) { 2630 k = table[i]; 2631 val = vc->vc_palette[j++]; 2632 palette_red[k] = (val << 8) | val; 2633 val = vc->vc_palette[j++]; 2634 palette_green[k] = (val << 8) | val; 2635 val = vc->vc_palette[j++]; 2636 palette_blue[k] = (val << 8) | val; 2637 } 2638 palette_cmap.len = 16; 2639 palette_cmap.start = 0; 2640 /* 2641 * If framebuffer is capable of less than 16 colors, 2642 * use default palette of fbcon. 2643 */ 2644 } else 2645 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap); 2646 2647 fb_set_cmap(&palette_cmap, info); 2648} 2649 2650/* As we might be inside of softback, we may work with non-contiguous buffer, 2651 that's why we have to use a separate routine. */ 2652static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt) 2653{ 2654 while (cnt--) { 2655 u16 a = scr_readw(p); 2656 if (!vc->vc_can_do_color) 2657 a ^= 0x0800; 2658 else if (vc->vc_hi_font_mask == 0x100) 2659 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | 2660 (((a) & 0x0e00) << 4); 2661 else 2662 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | 2663 (((a) & 0x0700) << 4); 2664 scr_writew(a, p++); 2665 } 2666} 2667 2668void fbcon_suspended(struct fb_info *info) 2669{ 2670 struct vc_data *vc = NULL; 2671 struct fbcon_par *par = info->fbcon_par; 2672 2673 if (!par || par->currcon < 0) 2674 return; 2675 vc = vc_cons[par->currcon].d; 2676 2677 /* Clear cursor, restore saved data */ 2678 fbcon_cursor(vc, false); 2679} 2680 2681void fbcon_resumed(struct fb_info *info) 2682{ 2683 struct vc_data *vc; 2684 struct fbcon_par *par = info->fbcon_par; 2685 2686 if (!par || par->currcon < 0) 2687 return; 2688 vc = vc_cons[par->currcon].d; 2689 2690 update_screen(vc); 2691} 2692 2693static void fbcon_modechanged(struct fb_info *info) 2694{ 2695 struct fbcon_par *par = info->fbcon_par; 2696 struct vc_data *vc; 2697 struct fbcon_display *p; 2698 int rows, cols; 2699 2700 if (!par || par->currcon < 0) 2701 return; 2702 vc = vc_cons[par->currcon].d; 2703 if (vc->vc_mode != KD_TEXT || 2704 fbcon_info_from_console(par->currcon) != info) 2705 return; 2706 2707 p = &fb_display[vc->vc_num]; 2708 set_blitting_type(vc, info); 2709 2710 if (con_is_visible(vc)) { 2711 var_to_display(p, &info->var, info); 2712 cols = FBCON_SWAP(par->rotate, info->var.xres, info->var.yres); 2713 rows = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 2714 cols /= vc->vc_font.width; 2715 rows /= vc->vc_font.height; 2716 vc_resize(vc, cols, rows); 2717 updatescrollmode(p, info, vc); 2718 scrollback_max = 0; 2719 scrollback_current = 0; 2720 2721 if (fbcon_is_active(vc, info)) { 2722 par->var.xoffset = par->var.yoffset = p->yscroll = 0; 2723 par->bitops->update_start(info); 2724 } 2725 2726 fbcon_set_palette(vc, color_table); 2727 update_screen(vc); 2728 } 2729} 2730 2731static void fbcon_set_all_vcs(struct fb_info *info) 2732{ 2733 struct fbcon_par *par = info->fbcon_par; 2734 struct vc_data *vc; 2735 struct fbcon_display *p; 2736 int i, rows, cols, fg = -1; 2737 2738 if (!par || par->currcon < 0) 2739 return; 2740 2741 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2742 vc = vc_cons[i].d; 2743 if (!vc || vc->vc_mode != KD_TEXT || 2744 fbcon_info_from_console(i) != info) 2745 continue; 2746 2747 if (con_is_visible(vc)) { 2748 fg = i; 2749 continue; 2750 } 2751 2752 p = &fb_display[vc->vc_num]; 2753 set_blitting_type(vc, info); 2754 var_to_display(p, &info->var, info); 2755 cols = FBCON_SWAP(par->rotate, info->var.xres, info->var.yres); 2756 rows = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 2757 cols /= vc->vc_font.width; 2758 rows /= vc->vc_font.height; 2759 vc_resize(vc, cols, rows); 2760 } 2761 2762 if (fg != -1) 2763 fbcon_modechanged(info); 2764} 2765 2766 2767void fbcon_update_vcs(struct fb_info *info, bool all) 2768{ 2769 if (all) 2770 fbcon_set_all_vcs(info); 2771 else 2772 fbcon_modechanged(info); 2773} 2774EXPORT_SYMBOL(fbcon_update_vcs); 2775 2776/* let fbcon check if it supports a new screen resolution */ 2777int fbcon_modechange_possible(struct fb_info *info, struct fb_var_screeninfo *var) 2778{ 2779 struct fbcon_par *par = info->fbcon_par; 2780 struct vc_data *vc; 2781 unsigned int i; 2782 2783 WARN_CONSOLE_UNLOCKED(); 2784 2785 if (!par) 2786 return 0; 2787 2788 /* prevent setting a screen size which is smaller than font size */ 2789 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2790 vc = vc_cons[i].d; 2791 if (!vc || vc->vc_mode != KD_TEXT || 2792 fbcon_info_from_console(i) != info) 2793 continue; 2794 2795 if (vc->vc_font.width > FBCON_SWAP(var->rotate, var->xres, var->yres) || 2796 vc->vc_font.height > FBCON_SWAP(var->rotate, var->yres, var->xres)) 2797 return -EINVAL; 2798 } 2799 2800 return 0; 2801} 2802EXPORT_SYMBOL_GPL(fbcon_modechange_possible); 2803 2804int fbcon_mode_deleted(struct fb_info *info, 2805 struct fb_videomode *mode) 2806{ 2807 struct fb_info *fb_info; 2808 struct fbcon_display *p; 2809 int i, j, found = 0; 2810 2811 /* before deletion, ensure that mode is not in use */ 2812 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2813 j = con2fb_map[i]; 2814 if (j == -1) 2815 continue; 2816 fb_info = fbcon_registered_fb[j]; 2817 if (fb_info != info) 2818 continue; 2819 p = &fb_display[i]; 2820 if (!p || !p->mode) 2821 continue; 2822 if (fb_mode_is_equal(p->mode, mode)) { 2823 found = 1; 2824 break; 2825 } 2826 } 2827 return found; 2828} 2829 2830static void fbcon_delete_mode(struct fb_videomode *m) 2831{ 2832 struct fbcon_display *p; 2833 2834 for (int i = first_fb_vc; i <= last_fb_vc; i++) { 2835 p = &fb_display[i]; 2836 if (p->mode == m) 2837 p->mode = NULL; 2838 } 2839} 2840 2841void fbcon_delete_modelist(struct list_head *head) 2842{ 2843 struct fb_modelist *modelist; 2844 2845 list_for_each_entry(modelist, head, list) 2846 fbcon_delete_mode(&modelist->mode); 2847} 2848 2849#ifdef CONFIG_VT_HW_CONSOLE_BINDING 2850static void fbcon_unbind(void) 2851{ 2852 int ret; 2853 2854 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc, 2855 fbcon_is_default); 2856 2857 if (!ret) 2858 fbcon_has_console_bind = false; 2859} 2860#else 2861static inline void fbcon_unbind(void) {} 2862#endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 2863 2864void fbcon_fb_unbind(struct fb_info *info) 2865{ 2866 int i, new_idx = -1; 2867 int idx = info->node; 2868 2869 console_lock(); 2870 2871 if (!fbcon_has_console_bind) { 2872 console_unlock(); 2873 return; 2874 } 2875 2876 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2877 if (con2fb_map[i] != idx && 2878 con2fb_map[i] != -1) { 2879 new_idx = con2fb_map[i]; 2880 break; 2881 } 2882 } 2883 2884 if (new_idx != -1) { 2885 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2886 if (con2fb_map[i] == idx) 2887 set_con2fb_map(i, new_idx, 0); 2888 } 2889 } else { 2890 struct fb_info *info = fbcon_registered_fb[idx]; 2891 2892 /* This is sort of like set_con2fb_map, except it maps 2893 * the consoles to no device and then releases the 2894 * oldinfo to free memory and cancel the cursor blink 2895 * timer. I can imagine this just becoming part of 2896 * set_con2fb_map where new_idx is -1 2897 */ 2898 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2899 if (con2fb_map[i] == idx) { 2900 con2fb_map[i] = -1; 2901 if (!search_fb_in_map(idx)) { 2902 con2fb_release_oldinfo(vc_cons[i].d, 2903 info, NULL); 2904 } 2905 } 2906 } 2907 fbcon_unbind(); 2908 } 2909 2910 console_unlock(); 2911} 2912 2913void fbcon_fb_unregistered(struct fb_info *info) 2914{ 2915 int i, idx; 2916 2917 console_lock(); 2918 2919 if (info->device && dev_is_pci(info->device)) 2920 vga_switcheroo_client_fb_set(to_pci_dev(info->device), NULL); 2921 2922 fbcon_registered_fb[info->node] = NULL; 2923 fbcon_num_registered_fb--; 2924 2925 if (deferred_takeover) { 2926 console_unlock(); 2927 return; 2928 } 2929 2930 idx = info->node; 2931 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2932 if (con2fb_map[i] == idx) 2933 con2fb_map[i] = -1; 2934 } 2935 2936 if (idx == info_idx) { 2937 info_idx = -1; 2938 2939 fbcon_for_each_registered_fb(i) { 2940 info_idx = i; 2941 break; 2942 } 2943 } 2944 2945 if (info_idx != -1) { 2946 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2947 if (con2fb_map[i] == -1) 2948 con2fb_map[i] = info_idx; 2949 } 2950 } 2951 2952 if (primary_device == idx) 2953 primary_device = -1; 2954 2955 if (!fbcon_num_registered_fb) 2956 do_unregister_con_driver(&fb_con); 2957 console_unlock(); 2958} 2959 2960void fbcon_remap_all(struct fb_info *info) 2961{ 2962 int i, idx = info->node; 2963 2964 console_lock(); 2965 if (deferred_takeover) { 2966 for (i = first_fb_vc; i <= last_fb_vc; i++) 2967 con2fb_map_boot[i] = idx; 2968 fbcon_map_override(); 2969 console_unlock(); 2970 return; 2971 } 2972 2973 for (i = first_fb_vc; i <= last_fb_vc; i++) 2974 set_con2fb_map(i, idx, 0); 2975 2976 if (con_is_bound(&fb_con)) { 2977 printk(KERN_INFO "fbcon: Remapping primary device, " 2978 "fb%i, to tty %i-%i\n", idx, 2979 first_fb_vc + 1, last_fb_vc + 1); 2980 info_idx = idx; 2981 } 2982 console_unlock(); 2983} 2984 2985#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 2986static void fbcon_select_primary(struct fb_info *info) 2987{ 2988 if (!map_override && primary_device == -1 && 2989 video_is_primary_device(info->device)) { 2990 int i; 2991 2992 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n", 2993 info->fix.id, info->node); 2994 primary_device = info->node; 2995 2996 for (i = first_fb_vc; i <= last_fb_vc; i++) 2997 con2fb_map_boot[i] = primary_device; 2998 2999 if (con_is_bound(&fb_con)) { 3000 printk(KERN_INFO "fbcon: Remapping primary device, " 3001 "fb%i, to tty %i-%i\n", info->node, 3002 first_fb_vc + 1, last_fb_vc + 1); 3003 info_idx = primary_device; 3004 } 3005 } 3006 3007} 3008#else 3009static inline void fbcon_select_primary(struct fb_info *info) 3010{ 3011 return; 3012} 3013#endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */ 3014 3015static bool lockless_register_fb; 3016module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400); 3017MODULE_PARM_DESC(lockless_register_fb, 3018 "Lockless framebuffer registration for debugging [default=off]"); 3019 3020/* called with console_lock held */ 3021static int do_fb_registered(struct fb_info *info) 3022{ 3023 int ret = 0, i, idx; 3024 3025 WARN_CONSOLE_UNLOCKED(); 3026 3027 fbcon_registered_fb[info->node] = info; 3028 fbcon_num_registered_fb++; 3029 3030 idx = info->node; 3031 fbcon_select_primary(info); 3032 3033 if (deferred_takeover) { 3034 pr_info("fbcon: Deferring console take-over\n"); 3035 return 0; 3036 } 3037 3038 if (info_idx == -1) { 3039 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3040 if (con2fb_map_boot[i] == idx) { 3041 info_idx = idx; 3042 break; 3043 } 3044 } 3045 3046 if (info_idx != -1) 3047 ret = do_fbcon_takeover(1); 3048 } else { 3049 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3050 if (con2fb_map_boot[i] == idx) 3051 set_con2fb_map(i, idx, 0); 3052 } 3053 } 3054 3055 /* Set the fb info for vga_switcheroo clients. Does nothing otherwise. */ 3056 if (info->device && dev_is_pci(info->device)) 3057 vga_switcheroo_client_fb_set(to_pci_dev(info->device), info); 3058 3059 return ret; 3060} 3061 3062int fbcon_fb_registered(struct fb_info *info) 3063{ 3064 int ret; 3065 3066 if (!lockless_register_fb) 3067 console_lock(); 3068 else 3069 atomic_inc(&ignore_console_lock_warning); 3070 3071 ret = do_fb_registered(info); 3072 3073 if (!lockless_register_fb) 3074 console_unlock(); 3075 else 3076 atomic_dec(&ignore_console_lock_warning); 3077 3078 return ret; 3079} 3080 3081void fbcon_fb_blanked(struct fb_info *info, int blank) 3082{ 3083 struct fbcon_par *par = info->fbcon_par; 3084 struct vc_data *vc; 3085 3086 if (!par || par->currcon < 0) 3087 return; 3088 3089 vc = vc_cons[par->currcon].d; 3090 if (vc->vc_mode != KD_TEXT || fbcon_info_from_console(par->currcon) != info) 3091 return; 3092 3093 if (con_is_visible(vc)) { 3094 if (blank) 3095 do_blank_screen(0); 3096 else 3097 do_unblank_screen(0); 3098 } 3099 par->blank_state = blank; 3100} 3101 3102void fbcon_new_modelist(struct fb_info *info) 3103{ 3104 int i; 3105 struct vc_data *vc; 3106 struct fb_var_screeninfo var; 3107 const struct fb_videomode *mode; 3108 3109 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3110 if (fbcon_info_from_console(i) != info) 3111 continue; 3112 if (!fb_display[i].mode) 3113 continue; 3114 vc = vc_cons[i].d; 3115 display_to_var(&var, &fb_display[i]); 3116 mode = fb_find_nearest_mode(fb_display[i].mode, 3117 &info->modelist); 3118 fb_videomode_to_var(&var, mode); 3119 fbcon_set_disp(info, &var, vc->vc_num); 3120 } 3121} 3122 3123void fbcon_get_requirement(struct fb_info *info, 3124 struct fb_blit_caps *caps) 3125{ 3126 struct vc_data *vc; 3127 3128 if (caps->flags) { 3129 int i, charcnt; 3130 3131 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3132 vc = vc_cons[i].d; 3133 if (vc && vc->vc_mode == KD_TEXT && 3134 info->node == con2fb_map[i]) { 3135 set_bit(vc->vc_font.width - 1, caps->x); 3136 set_bit(vc->vc_font.height - 1, caps->y); 3137 charcnt = vc->vc_font.charcount; 3138 if (caps->len < charcnt) 3139 caps->len = charcnt; 3140 } 3141 } 3142 } else { 3143 vc = vc_cons[fg_console].d; 3144 3145 if (vc && vc->vc_mode == KD_TEXT && 3146 info->node == con2fb_map[fg_console]) { 3147 bitmap_zero(caps->x, FB_MAX_BLIT_WIDTH); 3148 set_bit(vc->vc_font.width - 1, caps->x); 3149 bitmap_zero(caps->y, FB_MAX_BLIT_HEIGHT); 3150 set_bit(vc->vc_font.height - 1, caps->y); 3151 caps->len = vc->vc_font.charcount; 3152 } 3153 } 3154} 3155 3156int fbcon_set_con2fb_map_ioctl(void __user *argp) 3157{ 3158 struct fb_con2fbmap con2fb; 3159 int ret; 3160 3161 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3162 return -EFAULT; 3163 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3164 return -EINVAL; 3165 if (con2fb.framebuffer >= FB_MAX) 3166 return -EINVAL; 3167 if (!fbcon_registered_fb[con2fb.framebuffer]) 3168 request_module("fb%d", con2fb.framebuffer); 3169 if (!fbcon_registered_fb[con2fb.framebuffer]) { 3170 return -EINVAL; 3171 } 3172 3173 console_lock(); 3174 ret = set_con2fb_map(con2fb.console - 1, 3175 con2fb.framebuffer, 1); 3176 console_unlock(); 3177 3178 return ret; 3179} 3180 3181int fbcon_get_con2fb_map_ioctl(void __user *argp) 3182{ 3183 struct fb_con2fbmap con2fb; 3184 3185 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3186 return -EFAULT; 3187 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3188 return -EINVAL; 3189 3190 console_lock(); 3191 con2fb.framebuffer = con2fb_map[con2fb.console - 1]; 3192 console_unlock(); 3193 3194 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; 3195} 3196 3197/* 3198 * The console `switch' structure for the frame buffer based console 3199 */ 3200 3201static const struct consw fb_con = { 3202 .owner = THIS_MODULE, 3203 .con_startup = fbcon_startup, 3204 .con_init = fbcon_init, 3205 .con_deinit = fbcon_deinit, 3206 .con_clear = fbcon_clear, 3207 .con_putcs = fbcon_putcs, 3208 .con_cursor = fbcon_cursor, 3209 .con_scroll = fbcon_scroll, 3210 .con_switch = fbcon_switch, 3211 .con_blank = fbcon_blank, 3212 .con_font_set = fbcon_set_font, 3213 .con_font_get = fbcon_get_font, 3214 .con_font_default = fbcon_set_def_font, 3215 .con_set_palette = fbcon_set_palette, 3216 .con_invert_region = fbcon_invert_region, 3217 .con_resize = fbcon_resize, 3218 .con_debug_enter = fbcon_debug_enter, 3219 .con_debug_leave = fbcon_debug_leave, 3220}; 3221 3222static ssize_t rotate_store(struct device *device, 3223 struct device_attribute *attr, const char *buf, 3224 size_t count) 3225{ 3226 struct fb_info *info; 3227 int rotate, idx; 3228 char **last = NULL; 3229 3230 console_lock(); 3231 idx = con2fb_map[fg_console]; 3232 3233 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3234 goto err; 3235 3236 info = fbcon_registered_fb[idx]; 3237 rotate = simple_strtoul(buf, last, 0); 3238 fbcon_rotate(info, rotate); 3239err: 3240 console_unlock(); 3241 return count; 3242} 3243 3244static ssize_t rotate_all_store(struct device *device, 3245 struct device_attribute *attr,const char *buf, 3246 size_t count) 3247{ 3248 struct fb_info *info; 3249 int rotate, idx; 3250 char **last = NULL; 3251 3252 console_lock(); 3253 idx = con2fb_map[fg_console]; 3254 3255 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3256 goto err; 3257 3258 info = fbcon_registered_fb[idx]; 3259 rotate = simple_strtoul(buf, last, 0); 3260 fbcon_rotate_all(info, rotate); 3261err: 3262 console_unlock(); 3263 return count; 3264} 3265 3266static ssize_t rotate_show(struct device *device, 3267 struct device_attribute *attr,char *buf) 3268{ 3269 struct fb_info *info; 3270 int rotate = 0, idx; 3271 3272 console_lock(); 3273 idx = con2fb_map[fg_console]; 3274 3275 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3276 goto err; 3277 3278 info = fbcon_registered_fb[idx]; 3279 rotate = fbcon_get_rotate(info); 3280err: 3281 console_unlock(); 3282 return sysfs_emit(buf, "%d\n", rotate); 3283} 3284 3285static ssize_t cursor_blink_show(struct device *device, 3286 struct device_attribute *attr, char *buf) 3287{ 3288 struct fb_info *info; 3289 struct fbcon_par *par; 3290 int idx, blink = -1; 3291 3292 console_lock(); 3293 idx = con2fb_map[fg_console]; 3294 3295 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3296 goto err; 3297 3298 info = fbcon_registered_fb[idx]; 3299 par = info->fbcon_par; 3300 3301 if (!par) 3302 goto err; 3303 3304 blink = delayed_work_pending(&par->cursor_work); 3305err: 3306 console_unlock(); 3307 return sysfs_emit(buf, "%d\n", blink); 3308} 3309 3310static ssize_t cursor_blink_store(struct device *device, 3311 struct device_attribute *attr, 3312 const char *buf, size_t count) 3313{ 3314 struct fb_info *info; 3315 char **last = NULL; 3316 bool blink; 3317 int idx; 3318 3319 console_lock(); 3320 idx = con2fb_map[fg_console]; 3321 3322 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3323 goto err; 3324 3325 info = fbcon_registered_fb[idx]; 3326 3327 if (!info->fbcon_par) 3328 goto err; 3329 3330 blink = simple_strtoul(buf, last, 0); 3331 3332 if (blink) { 3333 fbcon_cursor_blink = true; 3334 fbcon_add_cursor_work(info); 3335 } else { 3336 fbcon_cursor_blink = false; 3337 fbcon_del_cursor_work(info); 3338 } 3339 3340err: 3341 console_unlock(); 3342 return count; 3343} 3344 3345static DEVICE_ATTR_RW(cursor_blink); 3346static DEVICE_ATTR_RW(rotate); 3347static DEVICE_ATTR_WO(rotate_all); 3348 3349static struct attribute *fbcon_device_attrs[] = { 3350 &dev_attr_cursor_blink.attr, 3351 &dev_attr_rotate.attr, 3352 &dev_attr_rotate_all.attr, 3353 NULL 3354}; 3355 3356ATTRIBUTE_GROUPS(fbcon_device); 3357 3358#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3359static void fbcon_register_existing_fbs(struct work_struct *work) 3360{ 3361 int i; 3362 3363 console_lock(); 3364 3365 deferred_takeover = false; 3366 logo_shown = FBCON_LOGO_DONTSHOW; 3367 3368 fbcon_for_each_registered_fb(i) 3369 do_fb_registered(fbcon_registered_fb[i]); 3370 3371 console_unlock(); 3372} 3373 3374static struct notifier_block fbcon_output_nb; 3375static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs); 3376 3377static int fbcon_output_notifier(struct notifier_block *nb, 3378 unsigned long action, void *data) 3379{ 3380 WARN_CONSOLE_UNLOCKED(); 3381 3382 pr_info("fbcon: Taking over console\n"); 3383 3384 dummycon_unregister_output_notifier(&fbcon_output_nb); 3385 3386 /* We may get called in atomic context */ 3387 schedule_work(&fbcon_deferred_takeover_work); 3388 3389 return NOTIFY_OK; 3390} 3391#endif 3392 3393static void fbcon_start(void) 3394{ 3395 WARN_CONSOLE_UNLOCKED(); 3396 3397#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3398 if (conswitchp != &dummy_con) 3399 deferred_takeover = false; 3400 3401 if (deferred_takeover) { 3402 fbcon_output_nb.notifier_call = fbcon_output_notifier; 3403 dummycon_register_output_notifier(&fbcon_output_nb); 3404 return; 3405 } 3406#endif 3407} 3408 3409void __init fb_console_init(void) 3410{ 3411 int i; 3412 3413 console_lock(); 3414 fbcon_device = device_create_with_groups(fb_class, NULL, 3415 MKDEV(0, 0), NULL, 3416 fbcon_device_groups, "fbcon"); 3417 3418 if (IS_ERR(fbcon_device)) { 3419 printk(KERN_WARNING "Unable to create device " 3420 "for fbcon; errno = %ld\n", 3421 PTR_ERR(fbcon_device)); 3422 fbcon_device = NULL; 3423 } 3424 3425 for (i = 0; i < MAX_NR_CONSOLES; i++) 3426 con2fb_map[i] = -1; 3427 3428 fbcon_start(); 3429 console_unlock(); 3430} 3431 3432#ifdef MODULE 3433 3434void __exit fb_console_exit(void) 3435{ 3436#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3437 console_lock(); 3438 if (deferred_takeover) 3439 dummycon_unregister_output_notifier(&fbcon_output_nb); 3440 console_unlock(); 3441 3442 cancel_work_sync(&fbcon_deferred_takeover_work); 3443#endif 3444 3445 console_lock(); 3446 device_destroy(fb_class, MKDEV(0, 0)); 3447 3448 do_unregister_con_driver(&fb_con); 3449 console_unlock(); 3450} 3451#endif
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