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