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