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