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