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