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