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