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 q = (unsigned short *) (vc->vc_origin + 664 vc->vc_size_row * rows); 665 step = logo_lines * cols; 666 for (r = q - logo_lines * cols; r < q; r++) 667 if (scr_readw(r) != vc->vc_video_erase_char) 668 break; 669 if (r != q && new_rows >= rows + logo_lines) { 670 save = kmalloc(array3_size(logo_lines, new_cols, 2), 671 GFP_KERNEL); 672 if (save) { 673 int i = min(cols, new_cols); 674 scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2)); 675 r = q - step; 676 for (cnt = 0; cnt < logo_lines; cnt++, r += i) 677 scr_memcpyw(save + cnt * new_cols, r, 2 * i); 678 r = q; 679 } 680 } 681 if (r == q) { 682 /* We can scroll screen down */ 683 r = q - step - cols; 684 for (cnt = rows - logo_lines; cnt > 0; cnt--) { 685 scr_memcpyw(r + step, r, vc->vc_size_row); 686 r -= cols; 687 } 688 if (!save) { 689 int lines; 690 if (vc->state.y + logo_lines >= rows) 691 lines = rows - vc->state.y - 1; 692 else 693 lines = logo_lines; 694 vc->state.y += lines; 695 vc->vc_pos += lines * vc->vc_size_row; 696 } 697 } 698 scr_memsetw((unsigned short *) vc->vc_origin, 699 erase, 700 vc->vc_size_row * logo_lines); 701 702 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 703 fbcon_clear_margins(vc, 0); 704 update_screen(vc); 705 } 706 707 if (save) { 708 q = (unsigned short *) (vc->vc_origin + 709 vc->vc_size_row * 710 rows); 711 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2)); 712 vc->state.y += logo_lines; 713 vc->vc_pos += logo_lines * vc->vc_size_row; 714 kfree(save); 715 } 716 717 if (logo_shown == FBCON_LOGO_DONTSHOW) 718 return; 719 720 if (logo_lines > vc->vc_bottom) { 721 logo_shown = FBCON_LOGO_CANSHOW; 722 pr_info("fbcon: disable boot-logo (boot-logo bigger than screen).\n"); 723 } else { 724 logo_shown = FBCON_LOGO_DRAW; 725 vc->vc_top = logo_lines; 726 } 727 } 728 #endif /* MODULE */ 729 730 #ifdef CONFIG_FB_TILEBLITTING 731 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 732 { 733 struct fbcon_par *par = info->fbcon_par; 734 735 par->p = &fb_display[vc->vc_num]; 736 737 if ((info->flags & FBINFO_MISC_TILEBLITTING)) 738 fbcon_set_tileops(vc, info); 739 else { 740 fbcon_set_rotation(info); 741 fbcon_set_bitops(par); 742 } 743 } 744 745 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 746 { 747 int err = 0; 748 749 if (info->flags & FBINFO_MISC_TILEBLITTING && 750 info->tileops->fb_get_tilemax(info) < charcount) 751 err = 1; 752 753 return err; 754 } 755 #else 756 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 757 { 758 struct fbcon_par *par = info->fbcon_par; 759 760 info->flags &= ~FBINFO_MISC_TILEBLITTING; 761 par->p = &fb_display[vc->vc_num]; 762 fbcon_set_rotation(info); 763 fbcon_set_bitops(par); 764 } 765 766 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 767 { 768 return 0; 769 } 770 771 #endif /* CONFIG_FB_TILEBLITTING */ 772 773 static void fbcon_release(struct fb_info *info) 774 { 775 lock_fb_info(info); 776 if (info->fbops->fb_release) 777 info->fbops->fb_release(info, 0); 778 unlock_fb_info(info); 779 780 module_put(info->fbops->owner); 781 782 if (info->fbcon_par) { 783 struct fbcon_par *par = info->fbcon_par; 784 785 fbcon_del_cursor_work(info); 786 kfree(par->cursor_state.mask); 787 kfree(par->cursor_data); 788 kfree(par->cursor_src); 789 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION 790 kfree(par->rotated.buf); 791 #endif 792 kfree(info->fbcon_par); 793 info->fbcon_par = NULL; 794 } 795 } 796 797 static int fbcon_open(struct fb_info *info) 798 { 799 struct fbcon_par *par; 800 801 if (!try_module_get(info->fbops->owner)) 802 return -ENODEV; 803 804 lock_fb_info(info); 805 if (info->fbops->fb_open && 806 info->fbops->fb_open(info, 0)) { 807 unlock_fb_info(info); 808 module_put(info->fbops->owner); 809 return -ENODEV; 810 } 811 unlock_fb_info(info); 812 813 par = kzalloc_obj(*par); 814 if (!par) { 815 fbcon_release(info); 816 return -ENOMEM; 817 } 818 819 INIT_DELAYED_WORK(&par->cursor_work, fb_flashcursor); 820 par->info = info; 821 info->fbcon_par = par; 822 par->cur_blink_jiffies = HZ / 5; 823 824 return 0; 825 } 826 827 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info, 828 int unit) 829 { 830 int err; 831 832 err = fbcon_open(info); 833 if (err) 834 return err; 835 836 if (vc) 837 set_blitting_type(vc, info); 838 839 return err; 840 } 841 842 static void con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo, 843 struct fb_info *newinfo) 844 { 845 int ret; 846 847 fbcon_release(oldinfo); 848 849 /* 850 If oldinfo and newinfo are driving the same hardware, 851 the fb_release() method of oldinfo may attempt to 852 restore the hardware state. This will leave the 853 newinfo in an undefined state. Thus, a call to 854 fb_set_par() may be needed for the newinfo. 855 */ 856 if (newinfo && newinfo->fbops->fb_set_par) { 857 ret = newinfo->fbops->fb_set_par(newinfo); 858 859 if (ret) 860 printk(KERN_ERR "con2fb_release_oldinfo: " 861 "detected unhandled fb_set_par error, " 862 "error code %d\n", ret); 863 } 864 } 865 866 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info, 867 int unit, int show_logo) 868 { 869 struct fbcon_par *par = info->fbcon_par; 870 int ret; 871 872 par->currcon = fg_console; 873 874 if (info->fbops->fb_set_par && !par->initialized) { 875 ret = info->fbops->fb_set_par(info); 876 877 if (ret) 878 printk(KERN_ERR "con2fb_init_display: detected " 879 "unhandled fb_set_par error, " 880 "error code %d\n", ret); 881 } 882 883 par->initialized = true; 884 par->graphics = 0; 885 fbcon_set_disp(info, &info->var, unit); 886 887 if (show_logo) { 888 struct vc_data *fg_vc = vc_cons[fg_console].d; 889 struct fb_info *fg_info = 890 fbcon_info_from_console(fg_console); 891 892 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols, 893 fg_vc->vc_rows, fg_vc->vc_cols, 894 fg_vc->vc_rows); 895 } 896 897 if (fg_console != unit) 898 update_screen(vc_cons[fg_console].d); 899 } 900 901 /** 902 * set_con2fb_map - map console to frame buffer device 903 * @unit: virtual console number to map 904 * @newidx: frame buffer index to map virtual console to 905 * @user: user request 906 * 907 * Maps a virtual console @unit to a frame buffer device 908 * @newidx. 909 * 910 * This should be called with the console lock held. 911 */ 912 static int set_con2fb_map(int unit, int newidx, int user) 913 { 914 struct vc_data *vc = vc_cons[unit].d; 915 int oldidx = con2fb_map[unit]; 916 struct fb_info *info = fbcon_registered_fb[newidx]; 917 struct fb_info *oldinfo = NULL; 918 int err = 0, show_logo; 919 920 WARN_CONSOLE_UNLOCKED(); 921 922 if (oldidx == newidx) 923 return 0; 924 925 if (!info) 926 return -EINVAL; 927 928 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) { 929 info_idx = newidx; 930 return do_fbcon_takeover(0); 931 } 932 933 if (oldidx != -1) 934 oldinfo = fbcon_registered_fb[oldidx]; 935 936 if (!search_fb_in_map(newidx)) { 937 err = con2fb_acquire_newinfo(vc, info, unit); 938 if (err) 939 return err; 940 941 fbcon_add_cursor_work(info); 942 } else if (vc) { 943 set_blitting_type(vc, info); 944 } 945 946 con2fb_map[unit] = newidx; 947 948 /* 949 * If old fb is not mapped to any of the consoles, 950 * fbcon should release it. 951 */ 952 if (oldinfo && !search_fb_in_map(oldidx)) 953 con2fb_release_oldinfo(vc, oldinfo, info); 954 955 show_logo = (fg_console == 0 && !user && 956 logo_shown != FBCON_LOGO_DONTSHOW); 957 958 con2fb_map_boot[unit] = newidx; 959 con2fb_init_display(vc, info, unit, show_logo); 960 961 if (!search_fb_in_map(info_idx)) 962 info_idx = newidx; 963 964 return err; 965 } 966 967 /* 968 * Low Level Operations 969 */ 970 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */ 971 static int var_to_display(struct fbcon_display *disp, 972 struct fb_var_screeninfo *var, 973 struct fb_info *info) 974 { 975 disp->xres_virtual = var->xres_virtual; 976 disp->yres_virtual = var->yres_virtual; 977 disp->bits_per_pixel = var->bits_per_pixel; 978 disp->grayscale = var->grayscale; 979 disp->nonstd = var->nonstd; 980 disp->accel_flags = var->accel_flags; 981 disp->height = var->height; 982 disp->width = var->width; 983 disp->red = var->red; 984 disp->green = var->green; 985 disp->blue = var->blue; 986 disp->transp = var->transp; 987 disp->rotate = var->rotate; 988 disp->mode = fb_match_mode(var, &info->modelist); 989 if (disp->mode == NULL) 990 /* This should not happen */ 991 return -EINVAL; 992 return 0; 993 } 994 995 static void display_to_var(struct fb_var_screeninfo *var, 996 struct fbcon_display *disp) 997 { 998 fb_videomode_to_var(var, disp->mode); 999 var->xres_virtual = disp->xres_virtual; 1000 var->yres_virtual = disp->yres_virtual; 1001 var->bits_per_pixel = disp->bits_per_pixel; 1002 var->grayscale = disp->grayscale; 1003 var->nonstd = disp->nonstd; 1004 var->accel_flags = disp->accel_flags; 1005 var->height = disp->height; 1006 var->width = disp->width; 1007 var->red = disp->red; 1008 var->green = disp->green; 1009 var->blue = disp->blue; 1010 var->transp = disp->transp; 1011 var->rotate = disp->rotate; 1012 } 1013 1014 static const char *fbcon_startup(void) 1015 { 1016 static const char display_desc[] = "frame buffer device"; 1017 struct fbcon_display *p = &fb_display[fg_console]; 1018 struct vc_data *vc = vc_cons[fg_console].d; 1019 const struct font_desc *font = NULL; 1020 struct fb_info *info = NULL; 1021 struct fbcon_par *par; 1022 int rows, cols; 1023 1024 /* 1025 * If fbcon_num_registered_fb is zero, this is a call for the dummy part. 1026 * The frame buffer devices weren't initialized yet. 1027 */ 1028 if (!fbcon_num_registered_fb || info_idx == -1) 1029 return display_desc; 1030 /* 1031 * Instead of blindly using fbcon_registered_fb[0], we use info_idx, set by 1032 * fbcon_fb_registered(); 1033 */ 1034 info = fbcon_registered_fb[info_idx]; 1035 if (!info) 1036 return NULL; 1037 1038 if (fbcon_open(info)) 1039 return NULL; 1040 1041 par = info->fbcon_par; 1042 par->currcon = -1; 1043 par->graphics = 1; 1044 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION 1045 par->rotated.buf_rotate = -1; 1046 #endif 1047 1048 p->con_rotate = initial_rotation; 1049 if (p->con_rotate == -1) 1050 p->con_rotate = info->fbcon_rotate_hint; 1051 if (p->con_rotate == -1) 1052 p->con_rotate = FB_ROTATE_UR; 1053 1054 set_blitting_type(vc, info); 1055 1056 /* Setup default font */ 1057 if (!p->fontdata) { 1058 if (!fontname[0] || !(font = find_font(fontname))) 1059 font = get_default_font(info->var.xres, 1060 info->var.yres, 1061 info->pixmap.blit_x, 1062 info->pixmap.blit_y); 1063 vc->vc_font.width = font->width; 1064 vc->vc_font.height = font->height; 1065 vc->vc_font.data = font_data_buf(font->data); 1066 vc->vc_font.charcount = font->charcount; 1067 1068 p->fontdata = font->data; 1069 font_data_get(p->fontdata); 1070 } 1071 1072 cols = FBCON_SWAP(par->rotate, info->var.xres, info->var.yres); 1073 rows = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 1074 cols /= vc->vc_font.width; 1075 rows /= vc->vc_font.height; 1076 vc_resize(vc, cols, rows); 1077 1078 pr_debug("mode: %s\n", info->fix.id); 1079 pr_debug("visual: %d\n", info->fix.visual); 1080 pr_debug("res: %dx%d-%d\n", info->var.xres, 1081 info->var.yres, 1082 info->var.bits_per_pixel); 1083 1084 fbcon_add_cursor_work(info); 1085 return display_desc; 1086 } 1087 1088 static void fbcon_init(struct vc_data *vc, bool init) 1089 { 1090 struct fb_info *info; 1091 struct fbcon_par *par; 1092 struct vc_data **default_mode = vc->vc_display_fg; 1093 struct vc_data *svc = *default_mode; 1094 struct fbcon_display *t, *p = &fb_display[vc->vc_num]; 1095 int logo = 1, new_rows, new_cols, rows, cols; 1096 int ret; 1097 1098 if (WARN_ON(info_idx == -1)) 1099 return; 1100 1101 if (con2fb_map[vc->vc_num] == -1) 1102 con2fb_map[vc->vc_num] = info_idx; 1103 1104 info = fbcon_info_from_console(vc->vc_num); 1105 1106 if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET) 1107 logo_shown = FBCON_LOGO_DONTSHOW; 1108 1109 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW || 1110 (info->fix.type == FB_TYPE_TEXT)) 1111 logo = 0; 1112 1113 if (var_to_display(p, &info->var, info)) 1114 return; 1115 1116 if (!info->fbcon_par) 1117 if (con2fb_acquire_newinfo(vc, info, vc->vc_num)) 1118 return; 1119 1120 /* If we are not the first console on this 1121 fb, copy the font from that console */ 1122 t = &fb_display[fg_console]; 1123 if (!p->fontdata) { 1124 if (t->fontdata) { 1125 struct vc_data *fvc = vc_cons[fg_console].d; 1126 1127 vc->vc_font.data = fvc->vc_font.data; 1128 vc->vc_font.width = fvc->vc_font.width; 1129 vc->vc_font.height = fvc->vc_font.height; 1130 vc->vc_font.charcount = fvc->vc_font.charcount; 1131 1132 p->fontdata = t->fontdata; 1133 font_data_get(p->fontdata); 1134 } else { 1135 const struct font_desc *font = NULL; 1136 1137 if (!fontname[0] || !(font = find_font(fontname))) 1138 font = get_default_font(info->var.xres, 1139 info->var.yres, 1140 info->pixmap.blit_x, 1141 info->pixmap.blit_y); 1142 vc->vc_font.width = font->width; 1143 vc->vc_font.height = font->height; 1144 vc->vc_font.data = font_data_buf(font->data); 1145 vc->vc_font.charcount = font->charcount; 1146 1147 p->fontdata = font->data; 1148 font_data_get(p->fontdata); 1149 } 1150 } 1151 1152 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1153 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1154 if (vc->vc_font.charcount == 256) { 1155 vc->vc_hi_font_mask = 0; 1156 } else { 1157 vc->vc_hi_font_mask = 0x100; 1158 if (vc->vc_can_do_color) 1159 vc->vc_complement_mask <<= 1; 1160 } 1161 1162 if (!*svc->uni_pagedict_loc) 1163 con_set_default_unimap(svc); 1164 if (!*vc->uni_pagedict_loc) 1165 con_copy_unimap(vc, svc); 1166 1167 par = info->fbcon_par; 1168 par->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1169 1170 p->con_rotate = initial_rotation; 1171 if (p->con_rotate == -1) 1172 p->con_rotate = info->fbcon_rotate_hint; 1173 if (p->con_rotate == -1) 1174 p->con_rotate = FB_ROTATE_UR; 1175 1176 set_blitting_type(vc, info); 1177 1178 cols = vc->vc_cols; 1179 rows = vc->vc_rows; 1180 new_cols = FBCON_SWAP(par->rotate, info->var.xres, info->var.yres); 1181 new_rows = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 1182 new_cols /= vc->vc_font.width; 1183 new_rows /= vc->vc_font.height; 1184 1185 /* 1186 * We must always set the mode. The mode of the previous console 1187 * driver could be in the same resolution but we are using different 1188 * hardware so we have to initialize the hardware. 1189 * 1190 * We need to do it in fbcon_init() to prevent screen corruption. 1191 */ 1192 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 1193 if (info->fbops->fb_set_par && !par->initialized) { 1194 ret = info->fbops->fb_set_par(info); 1195 1196 if (ret) 1197 printk(KERN_ERR "fbcon_init: detected " 1198 "unhandled fb_set_par error, " 1199 "error code %d\n", ret); 1200 } 1201 1202 par->initialized = true; 1203 } 1204 1205 par->graphics = 0; 1206 1207 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION 1208 if ((info->flags & FBINFO_HWACCEL_COPYAREA) && 1209 !(info->flags & FBINFO_HWACCEL_DISABLED)) 1210 p->scrollmode = SCROLL_MOVE; 1211 else /* default to something safe */ 1212 p->scrollmode = SCROLL_REDRAW; 1213 #endif 1214 1215 /* 1216 * ++guenther: console.c:vc_allocate() relies on initializing 1217 * vc_{cols,rows}, but we must not set those if we are only 1218 * resizing the console. 1219 */ 1220 if (init) { 1221 vc->vc_cols = new_cols; 1222 vc->vc_rows = new_rows; 1223 } else 1224 vc_resize(vc, new_cols, new_rows); 1225 1226 if (logo) 1227 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows); 1228 1229 if (par->bitops->rotate_font && par->bitops->rotate_font(info, vc)) { 1230 par->rotate = FB_ROTATE_UR; 1231 set_blitting_type(vc, info); 1232 } 1233 1234 par->p = &fb_display[fg_console]; 1235 } 1236 1237 static void fbcon_free_font(struct fbcon_display *p) 1238 { 1239 if (p->fontdata) { 1240 font_data_put(p->fontdata); 1241 p->fontdata = NULL; 1242 } 1243 } 1244 1245 static void set_vc_hi_font(struct vc_data *vc, bool set); 1246 1247 static void fbcon_release_all(void) 1248 { 1249 struct fb_info *info; 1250 int i, j, mapped; 1251 1252 fbcon_for_each_registered_fb(i) { 1253 mapped = 0; 1254 info = fbcon_registered_fb[i]; 1255 1256 for (j = first_fb_vc; j <= last_fb_vc; j++) { 1257 if (con2fb_map[j] == i) { 1258 mapped = 1; 1259 con2fb_map[j] = -1; 1260 } 1261 } 1262 1263 if (mapped) 1264 fbcon_release(info); 1265 } 1266 } 1267 1268 static void fbcon_deinit(struct vc_data *vc) 1269 { 1270 struct fbcon_display *p = &fb_display[vc->vc_num]; 1271 struct fb_info *info; 1272 struct fbcon_par *par; 1273 int idx; 1274 1275 fbcon_free_font(p); 1276 idx = con2fb_map[vc->vc_num]; 1277 1278 if (idx == -1) 1279 goto finished; 1280 1281 info = fbcon_registered_fb[idx]; 1282 1283 if (!info) 1284 goto finished; 1285 1286 par = info->fbcon_par; 1287 1288 if (!par) 1289 goto finished; 1290 1291 if (con_is_visible(vc)) 1292 fbcon_del_cursor_work(info); 1293 1294 par->initialized = false; 1295 finished: 1296 1297 fbcon_free_font(p); 1298 vc->vc_font.data = NULL; 1299 1300 if (vc->vc_hi_font_mask && vc->vc_screenbuf) 1301 set_vc_hi_font(vc, false); 1302 1303 if (!con_is_bound(&fb_con)) 1304 fbcon_release_all(); 1305 1306 if (vc->vc_num == logo_shown) 1307 logo_shown = FBCON_LOGO_CANSHOW; 1308 1309 return; 1310 } 1311 1312 /* ====================================================================== */ 1313 1314 /* fbcon_XXX routines - interface used by the world 1315 * 1316 * This system is now divided into two levels because of complications 1317 * caused by hardware scrolling. Top level functions: 1318 * 1319 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins() 1320 * 1321 * handles y values in range [0, scr_height-1] that correspond to real 1322 * screen positions. y_wrap shift means that first line of bitmap may be 1323 * anywhere on this display. These functions convert lineoffsets to 1324 * bitmap offsets and deal with the wrap-around case by splitting blits. 1325 * 1326 * fbcon_bmove_physical_8() -- These functions fast implementations 1327 * fbcon_clear_physical_8() -- of original fbcon_XXX fns. 1328 * fbcon_putc_physical_8() -- (font width != 8) may be added later 1329 * 1330 * WARNING: 1331 * 1332 * At the moment fbcon_putc() cannot blit across vertical wrap boundary 1333 * Implies should only really hardware scroll in rows. Only reason for 1334 * restriction is simplicity & efficiency at the moment. 1335 */ 1336 1337 static void __fbcon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx, 1338 unsigned int height, unsigned int width) 1339 { 1340 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1341 struct fbcon_par *par = info->fbcon_par; 1342 int fg, bg; 1343 struct fbcon_display *p = &fb_display[vc->vc_num]; 1344 u_int y_break; 1345 1346 if (!fbcon_is_active(vc, info)) 1347 return; 1348 1349 if (!height || !width) 1350 return; 1351 1352 if (sy < vc->vc_top && vc->vc_top == logo_lines) { 1353 vc->vc_top = 0; 1354 /* 1355 * If the font dimensions are not an integral of the display 1356 * dimensions then the par->clear below won't end up clearing 1357 * the margins. Call clear_margins here in case the logo 1358 * bitmap stretched into the margin area. 1359 */ 1360 fbcon_clear_margins(vc, 0); 1361 } 1362 1363 fg = get_color(vc, info, vc->vc_video_erase_char, 1); 1364 bg = get_color(vc, info, vc->vc_video_erase_char, 0); 1365 /* Split blits that cross physical y_wrap boundary */ 1366 1367 y_break = p->vrows - p->yscroll; 1368 if (sy < y_break && sy + height - 1 >= y_break) { 1369 u_int b = y_break - sy; 1370 par->bitops->clear(vc, info, real_y(p, sy), sx, b, width, fg, bg); 1371 par->bitops->clear(vc, info, real_y(p, sy + b), sx, height - b, 1372 width, fg, bg); 1373 } else 1374 par->bitops->clear(vc, info, real_y(p, sy), sx, height, width, fg, bg); 1375 } 1376 1377 static void fbcon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx, 1378 unsigned int width) 1379 { 1380 __fbcon_clear(vc, sy, sx, 1, width); 1381 } 1382 1383 static void fbcon_putcs(struct vc_data *vc, const u16 *s, unsigned int count, 1384 unsigned int ypos, unsigned int xpos) 1385 { 1386 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1387 struct fbcon_display *p = &fb_display[vc->vc_num]; 1388 struct fbcon_par *par = info->fbcon_par; 1389 1390 if (fbcon_is_active(vc, info)) 1391 par->bitops->putcs(vc, info, s, count, real_y(p, ypos), xpos, 1392 get_fg_color(vc, info, scr_readw(s)), 1393 get_bg_color(vc, info, scr_readw(s))); 1394 } 1395 1396 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only) 1397 { 1398 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1399 struct fbcon_par *par = info->fbcon_par; 1400 1401 if (fbcon_is_active(vc, info)) 1402 par->bitops->clear_margins(vc, info, margin_color, bottom_only); 1403 } 1404 1405 static void fbcon_cursor(struct vc_data *vc, bool enable) 1406 { 1407 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1408 struct fbcon_par *par = info->fbcon_par; 1409 int c = scr_readw((u16 *) vc->vc_pos); 1410 1411 par->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1412 1413 if (!fbcon_is_active(vc, info) || vc->vc_deccm != 1) 1414 return; 1415 1416 if (vc->vc_cursor_type & CUR_SW) 1417 fbcon_del_cursor_work(info); 1418 else 1419 fbcon_add_cursor_work(info); 1420 1421 par->cursor_flash = enable; 1422 1423 if (!par->bitops->cursor) 1424 return; 1425 1426 par->bitops->cursor(vc, info, enable, 1427 get_fg_color(vc, info, c), 1428 get_bg_color(vc, info, c)); 1429 } 1430 1431 static int scrollback_phys_max = 0; 1432 static int scrollback_max = 0; 1433 static int scrollback_current = 0; 1434 1435 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 1436 int unit) 1437 { 1438 struct fbcon_display *p, *t; 1439 struct vc_data **default_mode, *vc; 1440 struct vc_data *svc; 1441 struct fbcon_par *par = info->fbcon_par; 1442 int rows, cols, ret; 1443 1444 p = &fb_display[unit]; 1445 1446 if (var_to_display(p, var, info)) 1447 return; 1448 1449 vc = vc_cons[unit].d; 1450 1451 if (!vc) 1452 return; 1453 1454 default_mode = vc->vc_display_fg; 1455 svc = *default_mode; 1456 t = &fb_display[svc->vc_num]; 1457 1458 if (!p->fontdata) { 1459 vc->vc_font.data = font_data_buf(t->fontdata); 1460 vc->vc_font.width = (*default_mode)->vc_font.width; 1461 vc->vc_font.height = (*default_mode)->vc_font.height; 1462 vc->vc_font.charcount = (*default_mode)->vc_font.charcount; 1463 p->fontdata = t->fontdata; 1464 font_data_get(p->fontdata); 1465 } 1466 1467 var->activate = FB_ACTIVATE_NOW; 1468 info->var.activate = var->activate; 1469 var->yoffset = info->var.yoffset; 1470 var->xoffset = info->var.xoffset; 1471 fb_set_var(info, var); 1472 par->var = info->var; 1473 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1474 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1475 if (vc->vc_font.charcount == 256) { 1476 vc->vc_hi_font_mask = 0; 1477 } else { 1478 vc->vc_hi_font_mask = 0x100; 1479 if (vc->vc_can_do_color) 1480 vc->vc_complement_mask <<= 1; 1481 } 1482 1483 if (!*svc->uni_pagedict_loc) 1484 con_set_default_unimap(svc); 1485 if (!*vc->uni_pagedict_loc) 1486 con_copy_unimap(vc, svc); 1487 1488 cols = FBCON_SWAP(par->rotate, info->var.xres, info->var.yres); 1489 rows = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 1490 cols /= vc->vc_font.width; 1491 rows /= vc->vc_font.height; 1492 ret = vc_resize(vc, cols, rows); 1493 1494 if (con_is_visible(vc) && !ret) 1495 update_screen(vc); 1496 } 1497 1498 static __inline__ void ywrap_up(struct vc_data *vc, int count) 1499 { 1500 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1501 struct fbcon_par *par = info->fbcon_par; 1502 struct fbcon_display *p = &fb_display[vc->vc_num]; 1503 1504 p->yscroll += count; 1505 if (p->yscroll >= p->vrows) /* Deal with wrap */ 1506 p->yscroll -= p->vrows; 1507 par->var.xoffset = 0; 1508 par->var.yoffset = p->yscroll * vc->vc_font.height; 1509 par->var.vmode |= FB_VMODE_YWRAP; 1510 par->bitops->update_start(info); 1511 scrollback_max += count; 1512 if (scrollback_max > scrollback_phys_max) 1513 scrollback_max = scrollback_phys_max; 1514 scrollback_current = 0; 1515 } 1516 1517 static __inline__ void ywrap_down(struct vc_data *vc, int count) 1518 { 1519 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1520 struct fbcon_par *par = info->fbcon_par; 1521 struct fbcon_display *p = &fb_display[vc->vc_num]; 1522 1523 p->yscroll -= count; 1524 if (p->yscroll < 0) /* Deal with wrap */ 1525 p->yscroll += p->vrows; 1526 par->var.xoffset = 0; 1527 par->var.yoffset = p->yscroll * vc->vc_font.height; 1528 par->var.vmode |= FB_VMODE_YWRAP; 1529 par->bitops->update_start(info); 1530 scrollback_max -= count; 1531 if (scrollback_max < 0) 1532 scrollback_max = 0; 1533 scrollback_current = 0; 1534 } 1535 1536 static __inline__ void ypan_up(struct vc_data *vc, int count) 1537 { 1538 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1539 struct fbcon_display *p = &fb_display[vc->vc_num]; 1540 struct fbcon_par *par = info->fbcon_par; 1541 1542 p->yscroll += count; 1543 if (p->yscroll > p->vrows - vc->vc_rows) { 1544 par->bitops->bmove(vc, info, p->vrows - vc->vc_rows, 1545 0, 0, 0, vc->vc_rows, vc->vc_cols); 1546 p->yscroll -= p->vrows - vc->vc_rows; 1547 } 1548 1549 par->var.xoffset = 0; 1550 par->var.yoffset = p->yscroll * vc->vc_font.height; 1551 par->var.vmode &= ~FB_VMODE_YWRAP; 1552 par->bitops->update_start(info); 1553 fbcon_clear_margins(vc, 1); 1554 scrollback_max += count; 1555 if (scrollback_max > scrollback_phys_max) 1556 scrollback_max = scrollback_phys_max; 1557 scrollback_current = 0; 1558 } 1559 1560 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count) 1561 { 1562 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1563 struct fbcon_par *par = info->fbcon_par; 1564 struct fbcon_display *p = &fb_display[vc->vc_num]; 1565 1566 p->yscroll += count; 1567 1568 if (p->yscroll > p->vrows - vc->vc_rows) { 1569 p->yscroll -= p->vrows - vc->vc_rows; 1570 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t); 1571 } 1572 1573 par->var.xoffset = 0; 1574 par->var.yoffset = p->yscroll * vc->vc_font.height; 1575 par->var.vmode &= ~FB_VMODE_YWRAP; 1576 par->bitops->update_start(info); 1577 fbcon_clear_margins(vc, 1); 1578 scrollback_max += count; 1579 if (scrollback_max > scrollback_phys_max) 1580 scrollback_max = scrollback_phys_max; 1581 scrollback_current = 0; 1582 } 1583 1584 static __inline__ void ypan_down(struct vc_data *vc, int count) 1585 { 1586 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1587 struct fbcon_display *p = &fb_display[vc->vc_num]; 1588 struct fbcon_par *par = info->fbcon_par; 1589 1590 p->yscroll -= count; 1591 if (p->yscroll < 0) { 1592 par->bitops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows, 1593 0, vc->vc_rows, vc->vc_cols); 1594 p->yscroll += p->vrows - vc->vc_rows; 1595 } 1596 1597 par->var.xoffset = 0; 1598 par->var.yoffset = p->yscroll * vc->vc_font.height; 1599 par->var.vmode &= ~FB_VMODE_YWRAP; 1600 par->bitops->update_start(info); 1601 fbcon_clear_margins(vc, 1); 1602 scrollback_max -= count; 1603 if (scrollback_max < 0) 1604 scrollback_max = 0; 1605 scrollback_current = 0; 1606 } 1607 1608 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count) 1609 { 1610 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1611 struct fbcon_par *par = info->fbcon_par; 1612 struct fbcon_display *p = &fb_display[vc->vc_num]; 1613 1614 p->yscroll -= count; 1615 1616 if (p->yscroll < 0) { 1617 p->yscroll += p->vrows - vc->vc_rows; 1618 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count); 1619 } 1620 1621 par->var.xoffset = 0; 1622 par->var.yoffset = p->yscroll * vc->vc_font.height; 1623 par->var.vmode &= ~FB_VMODE_YWRAP; 1624 par->bitops->update_start(info); 1625 fbcon_clear_margins(vc, 1); 1626 scrollback_max -= count; 1627 if (scrollback_max < 0) 1628 scrollback_max = 0; 1629 scrollback_current = 0; 1630 } 1631 1632 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 1633 int line, int count, int dy) 1634 { 1635 unsigned short *s = (unsigned short *) 1636 (vc->vc_origin + vc->vc_size_row * line); 1637 1638 while (count--) { 1639 unsigned short *start = s; 1640 unsigned short *le = advance_row(s, 1); 1641 unsigned short c; 1642 int x = 0; 1643 unsigned short attr = 1; 1644 1645 do { 1646 c = scr_readw(s); 1647 if (attr != (c & 0xff00)) { 1648 attr = c & 0xff00; 1649 if (s > start) { 1650 fbcon_putcs(vc, start, s - start, 1651 dy, x); 1652 x += s - start; 1653 start = s; 1654 } 1655 } 1656 s++; 1657 } while (s < le); 1658 if (s > start) 1659 fbcon_putcs(vc, start, s - start, dy, x); 1660 dy++; 1661 } 1662 } 1663 1664 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info, 1665 struct fbcon_display *p, int line, int count, int ycount) 1666 { 1667 int offset = ycount * vc->vc_cols; 1668 unsigned short *d = (unsigned short *) 1669 (vc->vc_origin + vc->vc_size_row * line); 1670 unsigned short *s = d + offset; 1671 struct fbcon_par *par = info->fbcon_par; 1672 1673 while (count--) { 1674 unsigned short *start = s; 1675 unsigned short *le = advance_row(s, 1); 1676 unsigned short c; 1677 int x = 0; 1678 1679 do { 1680 c = scr_readw(s); 1681 1682 if (c == scr_readw(d)) { 1683 if (s > start) { 1684 par->bitops->bmove(vc, info, line + ycount, x, 1685 line, x, 1, s - start); 1686 x += s - start + 1; 1687 start = s + 1; 1688 } else { 1689 x++; 1690 start++; 1691 } 1692 } 1693 1694 scr_writew(c, d); 1695 s++; 1696 d++; 1697 } while (s < le); 1698 if (s > start) 1699 par->bitops->bmove(vc, info, line + ycount, x, line, x, 1, 1700 s - start); 1701 if (ycount > 0) 1702 line++; 1703 else { 1704 line--; 1705 /* NOTE: We subtract two lines from these pointers */ 1706 s -= vc->vc_size_row; 1707 d -= vc->vc_size_row; 1708 } 1709 } 1710 } 1711 1712 static void fbcon_redraw(struct vc_data *vc, int line, int count, int offset) 1713 { 1714 unsigned short *d = (unsigned short *) 1715 (vc->vc_origin + vc->vc_size_row * line); 1716 unsigned short *s = d + offset; 1717 1718 while (count--) { 1719 unsigned short *start = s; 1720 unsigned short *le = advance_row(s, 1); 1721 unsigned short c; 1722 int x = 0; 1723 unsigned short attr = 1; 1724 1725 do { 1726 c = scr_readw(s); 1727 if (attr != (c & 0xff00)) { 1728 attr = c & 0xff00; 1729 if (s > start) { 1730 fbcon_putcs(vc, start, s - start, 1731 line, x); 1732 x += s - start; 1733 start = s; 1734 } 1735 } 1736 if (c == scr_readw(d)) { 1737 if (s > start) { 1738 fbcon_putcs(vc, start, s - start, 1739 line, x); 1740 x += s - start + 1; 1741 start = s + 1; 1742 } else { 1743 x++; 1744 start++; 1745 } 1746 } 1747 scr_writew(c, d); 1748 s++; 1749 d++; 1750 } while (s < le); 1751 if (s > start) 1752 fbcon_putcs(vc, start, s - start, line, x); 1753 if (offset > 0) 1754 line++; 1755 else { 1756 line--; 1757 /* NOTE: We subtract two lines from these pointers */ 1758 s -= vc->vc_size_row; 1759 d -= vc->vc_size_row; 1760 } 1761 } 1762 } 1763 1764 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx, 1765 int dy, int dx, int height, int width, u_int y_break) 1766 { 1767 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1768 struct fbcon_par *par = info->fbcon_par; 1769 u_int b; 1770 1771 if (sy < y_break && sy + height > y_break) { 1772 b = y_break - sy; 1773 if (dy < sy) { /* Avoid trashing self */ 1774 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1775 y_break); 1776 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1777 height - b, width, y_break); 1778 } else { 1779 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1780 height - b, width, y_break); 1781 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1782 y_break); 1783 } 1784 return; 1785 } 1786 1787 if (dy < y_break && dy + height > y_break) { 1788 b = y_break - dy; 1789 if (dy < sy) { /* Avoid trashing self */ 1790 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1791 y_break); 1792 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1793 height - b, width, y_break); 1794 } else { 1795 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1796 height - b, width, y_break); 1797 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1798 y_break); 1799 } 1800 return; 1801 } 1802 par->bitops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx, 1803 height, width); 1804 } 1805 1806 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx, 1807 int height, int width) 1808 { 1809 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1810 struct fbcon_display *p = &fb_display[vc->vc_num]; 1811 1812 if (!fbcon_is_active(vc, info)) 1813 return; 1814 1815 if (!width || !height) 1816 return; 1817 1818 /* Split blits that cross physical y_wrap case. 1819 * Pathological case involves 4 blits, better to use recursive 1820 * code rather than unrolled case 1821 * 1822 * Recursive invocations don't need to erase the cursor over and 1823 * over again, so we use fbcon_bmove_rec() 1824 */ 1825 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width, 1826 p->vrows - p->yscroll); 1827 } 1828 1829 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b, 1830 enum con_scroll dir, unsigned int count) 1831 { 1832 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1833 struct fbcon_display *p = &fb_display[vc->vc_num]; 1834 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK; 1835 1836 if (!fbcon_is_active(vc, info)) 1837 return true; 1838 1839 fbcon_cursor(vc, false); 1840 1841 /* 1842 * ++Geert: Only use ywrap/ypan if the console is in text mode 1843 * ++Andrew: Only use ypan on hardware text mode when scrolling the 1844 * whole screen (prevents flicker). 1845 */ 1846 1847 switch (dir) { 1848 case SM_UP: 1849 if (count > vc->vc_rows) /* Maximum realistic size */ 1850 count = vc->vc_rows; 1851 switch (fb_scrollmode(p)) { 1852 case SCROLL_MOVE: 1853 fbcon_redraw_blit(vc, info, p, t, b - t - count, 1854 count); 1855 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1856 scr_memsetw((unsigned short *) (vc->vc_origin + 1857 vc->vc_size_row * 1858 (b - count)), 1859 vc->vc_video_erase_char, 1860 vc->vc_size_row * count); 1861 return true; 1862 1863 case SCROLL_WRAP_MOVE: 1864 if (b - t - count > 3 * vc->vc_rows >> 2) { 1865 if (t > 0) 1866 fbcon_bmove(vc, 0, 0, count, 0, t, 1867 vc->vc_cols); 1868 ywrap_up(vc, count); 1869 if (vc->vc_rows - b > 0) 1870 fbcon_bmove(vc, b - count, 0, b, 0, 1871 vc->vc_rows - b, 1872 vc->vc_cols); 1873 } else if (info->flags & FBINFO_READS_FAST) 1874 fbcon_bmove(vc, t + count, 0, t, 0, 1875 b - t - count, vc->vc_cols); 1876 else 1877 goto redraw_up; 1878 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1879 break; 1880 1881 case SCROLL_PAN_REDRAW: 1882 if ((p->yscroll + count <= 1883 2 * (p->vrows - vc->vc_rows)) 1884 && ((!scroll_partial && (b - t == vc->vc_rows)) 1885 || (scroll_partial 1886 && (b - t - count > 1887 3 * vc->vc_rows >> 2)))) { 1888 if (t > 0) 1889 fbcon_redraw_move(vc, p, 0, t, count); 1890 ypan_up_redraw(vc, t, count); 1891 if (vc->vc_rows - b > 0) 1892 fbcon_redraw_move(vc, p, b, 1893 vc->vc_rows - b, b); 1894 } else 1895 fbcon_redraw_move(vc, p, t + count, b - t - count, t); 1896 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1897 break; 1898 1899 case SCROLL_PAN_MOVE: 1900 if ((p->yscroll + count <= 1901 2 * (p->vrows - vc->vc_rows)) 1902 && ((!scroll_partial && (b - t == vc->vc_rows)) 1903 || (scroll_partial 1904 && (b - t - count > 1905 3 * vc->vc_rows >> 2)))) { 1906 if (t > 0) 1907 fbcon_bmove(vc, 0, 0, count, 0, t, 1908 vc->vc_cols); 1909 ypan_up(vc, count); 1910 if (vc->vc_rows - b > 0) 1911 fbcon_bmove(vc, b - count, 0, b, 0, 1912 vc->vc_rows - b, 1913 vc->vc_cols); 1914 } else if (info->flags & FBINFO_READS_FAST) 1915 fbcon_bmove(vc, t + count, 0, t, 0, 1916 b - t - count, vc->vc_cols); 1917 else 1918 goto redraw_up; 1919 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1920 break; 1921 1922 case SCROLL_REDRAW: 1923 redraw_up: 1924 fbcon_redraw(vc, t, b - t - count, 1925 count * vc->vc_cols); 1926 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1927 scr_memsetw((unsigned short *) (vc->vc_origin + 1928 vc->vc_size_row * 1929 (b - count)), 1930 vc->vc_video_erase_char, 1931 vc->vc_size_row * count); 1932 return true; 1933 } 1934 break; 1935 1936 case SM_DOWN: 1937 if (count > vc->vc_rows) /* Maximum realistic size */ 1938 count = vc->vc_rows; 1939 switch (fb_scrollmode(p)) { 1940 case SCROLL_MOVE: 1941 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count, 1942 -count); 1943 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1944 scr_memsetw((unsigned short *) (vc->vc_origin + 1945 vc->vc_size_row * 1946 t), 1947 vc->vc_video_erase_char, 1948 vc->vc_size_row * count); 1949 return true; 1950 1951 case SCROLL_WRAP_MOVE: 1952 if (b - t - count > 3 * vc->vc_rows >> 2) { 1953 if (vc->vc_rows - b > 0) 1954 fbcon_bmove(vc, b, 0, b - count, 0, 1955 vc->vc_rows - b, 1956 vc->vc_cols); 1957 ywrap_down(vc, count); 1958 if (t > 0) 1959 fbcon_bmove(vc, count, 0, 0, 0, t, 1960 vc->vc_cols); 1961 } else if (info->flags & FBINFO_READS_FAST) 1962 fbcon_bmove(vc, t, 0, t + count, 0, 1963 b - t - count, vc->vc_cols); 1964 else 1965 goto redraw_down; 1966 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1967 break; 1968 1969 case SCROLL_PAN_MOVE: 1970 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1971 && ((!scroll_partial && (b - t == vc->vc_rows)) 1972 || (scroll_partial 1973 && (b - t - count > 1974 3 * vc->vc_rows >> 2)))) { 1975 if (vc->vc_rows - b > 0) 1976 fbcon_bmove(vc, b, 0, b - count, 0, 1977 vc->vc_rows - b, 1978 vc->vc_cols); 1979 ypan_down(vc, count); 1980 if (t > 0) 1981 fbcon_bmove(vc, count, 0, 0, 0, t, 1982 vc->vc_cols); 1983 } else if (info->flags & FBINFO_READS_FAST) 1984 fbcon_bmove(vc, t, 0, t + count, 0, 1985 b - t - count, vc->vc_cols); 1986 else 1987 goto redraw_down; 1988 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1989 break; 1990 1991 case SCROLL_PAN_REDRAW: 1992 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1993 && ((!scroll_partial && (b - t == vc->vc_rows)) 1994 || (scroll_partial 1995 && (b - t - count > 1996 3 * vc->vc_rows >> 2)))) { 1997 if (vc->vc_rows - b > 0) 1998 fbcon_redraw_move(vc, p, b, vc->vc_rows - b, 1999 b - count); 2000 ypan_down_redraw(vc, t, count); 2001 if (t > 0) 2002 fbcon_redraw_move(vc, p, count, t, 0); 2003 } else 2004 fbcon_redraw_move(vc, p, t, b - t - count, t + count); 2005 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 2006 break; 2007 2008 case SCROLL_REDRAW: 2009 redraw_down: 2010 fbcon_redraw(vc, b - 1, b - t - count, 2011 -count * vc->vc_cols); 2012 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 2013 scr_memsetw((unsigned short *) (vc->vc_origin + 2014 vc->vc_size_row * 2015 t), 2016 vc->vc_video_erase_char, 2017 vc->vc_size_row * count); 2018 return true; 2019 } 2020 } 2021 return false; 2022 } 2023 2024 2025 static void updatescrollmode_accel(struct fbcon_display *p, 2026 struct fb_info *info, 2027 struct vc_data *vc) 2028 { 2029 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION 2030 struct fbcon_par *par = info->fbcon_par; 2031 int cap = info->flags; 2032 u16 t = 0; 2033 int ypan = FBCON_SWAP(par->rotate, info->fix.ypanstep, info->fix.xpanstep); 2034 int ywrap = FBCON_SWAP(par->rotate, info->fix.ywrapstep, t); 2035 int yres = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 2036 int vyres = FBCON_SWAP(par->rotate, info->var.yres_virtual, info->var.xres_virtual); 2037 int good_pan = (cap & FBINFO_HWACCEL_YPAN) && 2038 divides(ypan, vc->vc_font.height) && vyres > yres; 2039 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) && 2040 divides(ywrap, vc->vc_font.height) && 2041 divides(vc->vc_font.height, vyres) && 2042 divides(vc->vc_font.height, yres); 2043 int reading_fast = cap & FBINFO_READS_FAST; 2044 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) && 2045 !(cap & FBINFO_HWACCEL_DISABLED); 2046 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) && 2047 !(cap & FBINFO_HWACCEL_DISABLED); 2048 2049 if (good_wrap || good_pan) { 2050 if (reading_fast || fast_copyarea) 2051 p->scrollmode = good_wrap ? 2052 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE; 2053 else 2054 p->scrollmode = good_wrap ? SCROLL_REDRAW : 2055 SCROLL_PAN_REDRAW; 2056 } else { 2057 if (reading_fast || (fast_copyarea && !fast_imageblit)) 2058 p->scrollmode = SCROLL_MOVE; 2059 else 2060 p->scrollmode = SCROLL_REDRAW; 2061 } 2062 #endif 2063 } 2064 2065 static void updatescrollmode(struct fbcon_display *p, 2066 struct fb_info *info, 2067 struct vc_data *vc) 2068 { 2069 struct fbcon_par *par = info->fbcon_par; 2070 int fh = vc->vc_font.height; 2071 int yres = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 2072 int vyres = FBCON_SWAP(par->rotate, info->var.yres_virtual, info->var.xres_virtual); 2073 2074 p->vrows = vyres/fh; 2075 if (yres > (fh * (vc->vc_rows + 1))) 2076 p->vrows -= (yres - (fh * vc->vc_rows)) / fh; 2077 if ((yres % fh) && (vyres % fh < yres % fh)) 2078 p->vrows--; 2079 2080 /* update scrollmode in case hardware acceleration is used */ 2081 updatescrollmode_accel(p, info, vc); 2082 } 2083 2084 static int fbcon_resize(struct vc_data *vc, unsigned int width, 2085 unsigned int height, bool from_user) 2086 { 2087 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2088 struct fbcon_par *par = info->fbcon_par; 2089 struct fbcon_display *p = &fb_display[vc->vc_num]; 2090 struct fb_var_screeninfo var = info->var; 2091 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh; 2092 2093 if (font_data_size(p->fontdata)) { 2094 unsigned int size = vc_font_size(&vc->vc_font); 2095 2096 /* 2097 * If user font, ensure that a possible change to user font 2098 * height or width will not allow a font data out-of-bounds access. 2099 * NOTE: must use original charcount in calculation as font 2100 * charcount can change and cannot be used to determine the 2101 * font data allocated size. 2102 */ 2103 if (!size || size > font_data_size(p->fontdata)) 2104 return -EINVAL; 2105 } 2106 2107 virt_w = FBCON_SWAP(par->rotate, width, height); 2108 virt_h = FBCON_SWAP(par->rotate, height, width); 2109 virt_fw = FBCON_SWAP(par->rotate, vc->vc_font.width, vc->vc_font.height); 2110 virt_fh = FBCON_SWAP(par->rotate, vc->vc_font.height, vc->vc_font.width); 2111 var.xres = virt_w * virt_fw; 2112 var.yres = virt_h * virt_fh; 2113 x_diff = info->var.xres - var.xres; 2114 y_diff = info->var.yres - var.yres; 2115 if (x_diff < 0 || x_diff > virt_fw || 2116 y_diff < 0 || y_diff > virt_fh) { 2117 const struct fb_videomode *mode; 2118 2119 pr_debug("attempting resize %ix%i\n", var.xres, var.yres); 2120 mode = fb_find_best_mode(&var, &info->modelist); 2121 if (mode == NULL) 2122 return -EINVAL; 2123 display_to_var(&var, p); 2124 fb_videomode_to_var(&var, mode); 2125 2126 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh) 2127 return -EINVAL; 2128 2129 pr_debug("resize now %ix%i\n", var.xres, var.yres); 2130 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 2131 var.activate = FB_ACTIVATE_NOW | 2132 FB_ACTIVATE_FORCE; 2133 fb_set_var(info, &var); 2134 } 2135 var_to_display(p, &info->var, info); 2136 par->var = info->var; 2137 } 2138 updatescrollmode(p, info, vc); 2139 return 0; 2140 } 2141 2142 static bool fbcon_switch(struct vc_data *vc) 2143 { 2144 struct fb_info *info, *old_info = NULL; 2145 struct fbcon_par *par; 2146 struct fbcon_display *p = &fb_display[vc->vc_num]; 2147 struct fb_var_screeninfo var; 2148 int i, ret, prev_console; 2149 2150 info = fbcon_info_from_console(vc->vc_num); 2151 par = info->fbcon_par; 2152 2153 if (logo_shown >= 0) { 2154 struct vc_data *conp2 = vc_cons[logo_shown].d; 2155 2156 if (conp2->vc_top == logo_lines 2157 && conp2->vc_bottom == conp2->vc_rows) 2158 conp2->vc_top = 0; 2159 logo_shown = FBCON_LOGO_CANSHOW; 2160 } 2161 2162 prev_console = par->currcon; 2163 if (prev_console != -1) 2164 old_info = fbcon_info_from_console(prev_console); 2165 /* 2166 * FIXME: If we have multiple fbdev's loaded, we need to 2167 * update all info->currcon. Perhaps, we can place this 2168 * in a centralized structure, but this might break some 2169 * drivers. 2170 * 2171 * info->currcon = vc->vc_num; 2172 */ 2173 fbcon_for_each_registered_fb(i) { 2174 if (fbcon_registered_fb[i]->fbcon_par) { 2175 struct fbcon_par *par = fbcon_registered_fb[i]->fbcon_par; 2176 2177 par->currcon = vc->vc_num; 2178 } 2179 } 2180 memset(&var, 0, sizeof(struct fb_var_screeninfo)); 2181 display_to_var(&var, p); 2182 var.activate = FB_ACTIVATE_NOW; 2183 2184 /* 2185 * make sure we don't unnecessarily trip the memcmp() 2186 * in fb_set_var() 2187 */ 2188 info->var.activate = var.activate; 2189 var.vmode |= info->var.vmode & ~FB_VMODE_MASK; 2190 fb_set_var(info, &var); 2191 par->var = info->var; 2192 2193 if (old_info != NULL && (old_info != info || 2194 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) { 2195 if (info->fbops->fb_set_par) { 2196 ret = info->fbops->fb_set_par(info); 2197 2198 if (ret) 2199 printk(KERN_ERR "fbcon_switch: detected " 2200 "unhandled fb_set_par error, " 2201 "error code %d\n", ret); 2202 } 2203 2204 if (old_info != info) 2205 fbcon_del_cursor_work(old_info); 2206 } 2207 2208 if (!fbcon_is_active(vc, info) || par->blank_state != FB_BLANK_UNBLANK) 2209 fbcon_del_cursor_work(info); 2210 else 2211 fbcon_add_cursor_work(info); 2212 2213 set_blitting_type(vc, info); 2214 par->cursor_reset = 1; 2215 2216 if (par->bitops->rotate_font && par->bitops->rotate_font(info, vc)) { 2217 par->rotate = FB_ROTATE_UR; 2218 set_blitting_type(vc, info); 2219 } 2220 2221 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 2222 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 2223 2224 if (vc->vc_font.charcount > 256) 2225 vc->vc_complement_mask <<= 1; 2226 2227 updatescrollmode(p, info, vc); 2228 2229 switch (fb_scrollmode(p)) { 2230 case SCROLL_WRAP_MOVE: 2231 scrollback_phys_max = p->vrows - vc->vc_rows; 2232 break; 2233 case SCROLL_PAN_MOVE: 2234 case SCROLL_PAN_REDRAW: 2235 scrollback_phys_max = p->vrows - 2 * vc->vc_rows; 2236 if (scrollback_phys_max < 0) 2237 scrollback_phys_max = 0; 2238 break; 2239 default: 2240 scrollback_phys_max = 0; 2241 break; 2242 } 2243 2244 scrollback_max = 0; 2245 scrollback_current = 0; 2246 2247 if (fbcon_is_active(vc, info)) { 2248 par->var.xoffset = par->var.yoffset = p->yscroll = 0; 2249 par->bitops->update_start(info); 2250 } 2251 2252 fbcon_set_palette(vc, color_table); 2253 fbcon_clear_margins(vc, 0); 2254 2255 if (logo_shown == FBCON_LOGO_DRAW) { 2256 2257 logo_shown = fg_console; 2258 fb_show_logo(info, par->rotate); 2259 update_region(vc, 2260 vc->vc_origin + vc->vc_size_row * vc->vc_top, 2261 vc->vc_size_row * (vc->vc_bottom - 2262 vc->vc_top) / 2); 2263 return false; 2264 } 2265 return true; 2266 } 2267 2268 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info, 2269 int blank) 2270 { 2271 if (blank) { 2272 unsigned short charmask = vc->vc_hi_font_mask ? 2273 0x1ff : 0xff; 2274 unsigned short oldc; 2275 2276 oldc = vc->vc_video_erase_char; 2277 vc->vc_video_erase_char &= charmask; 2278 __fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols); 2279 vc->vc_video_erase_char = oldc; 2280 } 2281 } 2282 2283 static bool fbcon_blank(struct vc_data *vc, enum vesa_blank_mode blank, 2284 bool mode_switch) 2285 { 2286 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2287 struct fbcon_par *par = info->fbcon_par; 2288 2289 if (mode_switch) { 2290 struct fb_var_screeninfo var = info->var; 2291 2292 par->graphics = 1; 2293 2294 if (!blank) { 2295 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE | 2296 FB_ACTIVATE_KD_TEXT; 2297 fb_set_var(info, &var); 2298 par->graphics = 0; 2299 par->var = info->var; 2300 } 2301 } 2302 2303 if (fbcon_is_active(vc, info)) { 2304 if (par->blank_state != blank) { 2305 par->blank_state = blank; 2306 fbcon_cursor(vc, !blank); 2307 par->cursor_flash = (!blank); 2308 2309 if (fb_blank(info, blank)) 2310 fbcon_generic_blank(vc, info, blank); 2311 } 2312 2313 if (!blank) 2314 update_screen(vc); 2315 } 2316 2317 if (mode_switch || !fbcon_is_active(vc, info) || par->blank_state != FB_BLANK_UNBLANK) 2318 fbcon_del_cursor_work(info); 2319 else 2320 fbcon_add_cursor_work(info); 2321 2322 return false; 2323 } 2324 2325 static int fbcon_get_font(struct vc_data *vc, struct console_font *font, unsigned int vpitch) 2326 { 2327 const struct fbcon_display *p = &fb_display[vc->vc_num]; 2328 2329 font->width = vc->vc_font.width; 2330 font->height = vc->vc_font.height; 2331 if (font->height > vpitch) 2332 return -ENOSPC; 2333 font->charcount = vc->vc_hi_font_mask ? 512 : 256; 2334 2335 return font_data_export(p->fontdata, font, vpitch); 2336 } 2337 2338 /* set/clear vc_hi_font_mask and update vc attrs accordingly */ 2339 static void set_vc_hi_font(struct vc_data *vc, bool set) 2340 { 2341 if (!set) { 2342 vc->vc_hi_font_mask = 0; 2343 if (vc->vc_can_do_color) { 2344 vc->vc_complement_mask >>= 1; 2345 vc->vc_s_complement_mask >>= 1; 2346 } 2347 2348 /* ++Edmund: reorder the attribute bits */ 2349 if (vc->vc_can_do_color) { 2350 unsigned short *cp = 2351 (unsigned short *) vc->vc_origin; 2352 int count = vc->vc_screenbuf_size / 2; 2353 unsigned short c; 2354 for (; count > 0; count--, cp++) { 2355 c = scr_readw(cp); 2356 scr_writew(((c & 0xfe00) >> 1) | 2357 (c & 0xff), cp); 2358 } 2359 c = vc->vc_video_erase_char; 2360 vc->vc_video_erase_char = 2361 ((c & 0xfe00) >> 1) | (c & 0xff); 2362 vc->vc_attr >>= 1; 2363 } 2364 } else { 2365 vc->vc_hi_font_mask = 0x100; 2366 if (vc->vc_can_do_color) { 2367 vc->vc_complement_mask <<= 1; 2368 vc->vc_s_complement_mask <<= 1; 2369 } 2370 2371 /* ++Edmund: reorder the attribute bits */ 2372 { 2373 unsigned short *cp = 2374 (unsigned short *) vc->vc_origin; 2375 int count = vc->vc_screenbuf_size / 2; 2376 unsigned short c; 2377 for (; count > 0; count--, cp++) { 2378 unsigned short newc; 2379 c = scr_readw(cp); 2380 if (vc->vc_can_do_color) 2381 newc = 2382 ((c & 0xff00) << 1) | (c & 2383 0xff); 2384 else 2385 newc = c & ~0x100; 2386 scr_writew(newc, cp); 2387 } 2388 c = vc->vc_video_erase_char; 2389 if (vc->vc_can_do_color) { 2390 vc->vc_video_erase_char = 2391 ((c & 0xff00) << 1) | (c & 0xff); 2392 vc->vc_attr <<= 1; 2393 } else 2394 vc->vc_video_erase_char = c & ~0x100; 2395 } 2396 } 2397 } 2398 2399 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount, 2400 font_data_t *data) 2401 { 2402 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2403 struct fbcon_par *par = info->fbcon_par; 2404 struct fbcon_display *p = &fb_display[vc->vc_num]; 2405 int resize, ret, old_width, old_height, old_charcount; 2406 font_data_t *old_fontdata = p->fontdata; 2407 const u8 *old_data = vc->vc_font.data; 2408 2409 font_data_get(data); 2410 2411 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height); 2412 p->fontdata = data; 2413 vc->vc_font.data = font_data_buf(p->fontdata); 2414 old_width = vc->vc_font.width; 2415 old_height = vc->vc_font.height; 2416 old_charcount = vc->vc_font.charcount; 2417 2418 vc->vc_font.width = w; 2419 vc->vc_font.height = h; 2420 vc->vc_font.charcount = charcount; 2421 if (vc->vc_hi_font_mask && charcount == 256) 2422 set_vc_hi_font(vc, false); 2423 else if (!vc->vc_hi_font_mask && charcount == 512) 2424 set_vc_hi_font(vc, true); 2425 2426 if (resize) { 2427 int cols, rows; 2428 2429 cols = FBCON_SWAP(par->rotate, info->var.xres, info->var.yres); 2430 rows = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 2431 cols /= w; 2432 rows /= h; 2433 ret = vc_resize(vc, cols, rows); 2434 if (ret) 2435 goto err_out; 2436 } else if (con_is_visible(vc) 2437 && vc->vc_mode == KD_TEXT) { 2438 fbcon_clear_margins(vc, 0); 2439 update_screen(vc); 2440 } 2441 2442 if (old_fontdata) 2443 font_data_put(old_fontdata); 2444 2445 return 0; 2446 2447 err_out: 2448 p->fontdata = old_fontdata; 2449 vc->vc_font.data = old_data; 2450 vc->vc_font.width = old_width; 2451 vc->vc_font.height = old_height; 2452 vc->vc_font.charcount = old_charcount; 2453 2454 font_data_put(data); 2455 2456 return ret; 2457 } 2458 2459 /* 2460 * User asked to set font; we are guaranteed that charcount does not exceed 512 2461 * but lets not assume that, since charcount of 512 is small for unicode support. 2462 */ 2463 2464 static int fbcon_set_font(struct vc_data *vc, const struct console_font *font, 2465 unsigned int vpitch, unsigned int flags) 2466 { 2467 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2468 unsigned charcount = font->charcount; 2469 int w = font->width; 2470 int h = font->height; 2471 int i, ret; 2472 font_data_t *new_data; 2473 2474 /* Is there a reason why fbconsole couldn't handle any charcount >256? 2475 * If not this check should be changed to charcount < 256 */ 2476 if (charcount != 256 && charcount != 512) 2477 return -EINVAL; 2478 2479 /* font bigger than screen resolution ? */ 2480 if (w > FBCON_SWAP(info->var.rotate, info->var.xres, info->var.yres) || 2481 h > FBCON_SWAP(info->var.rotate, info->var.yres, info->var.xres)) 2482 return -EINVAL; 2483 2484 if (font->width > FB_MAX_BLIT_WIDTH || font->height > FB_MAX_BLIT_HEIGHT) 2485 return -EINVAL; 2486 2487 /* Make sure drawing engine can handle the font */ 2488 if (!test_bit(font->width - 1, info->pixmap.blit_x) || 2489 !test_bit(font->height - 1, info->pixmap.blit_y)) 2490 return -EINVAL; 2491 2492 /* Make sure driver can handle the font length */ 2493 if (fbcon_invalid_charcount(info, charcount)) 2494 return -EINVAL; 2495 2496 new_data = font_data_import(font, vpitch, crc32); 2497 if (IS_ERR(new_data)) 2498 return PTR_ERR(new_data); 2499 2500 /* Check if the same font is on some other console already */ 2501 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2502 if (fb_display[i].fontdata && 2503 font_data_is_equal(fb_display[i].fontdata, new_data)) { 2504 font_data_get(fb_display[i].fontdata); 2505 font_data_put(new_data); 2506 new_data = fb_display[i].fontdata; 2507 break; 2508 } 2509 } 2510 ret = fbcon_do_set_font(vc, font->width, font->height, charcount, new_data); 2511 font_data_put(new_data); 2512 2513 return ret; 2514 } 2515 2516 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, 2517 const char *name) 2518 { 2519 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2520 const struct font_desc *f; 2521 2522 if (!name) 2523 f = get_default_font(info->var.xres, info->var.yres, 2524 info->pixmap.blit_x, info->pixmap.blit_y); 2525 else if (!(f = find_font(name))) 2526 return -ENOENT; 2527 2528 font->width = f->width; 2529 font->height = f->height; 2530 return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data); 2531 } 2532 2533 static u16 palette_red[16]; 2534 static u16 palette_green[16]; 2535 static u16 palette_blue[16]; 2536 2537 static struct fb_cmap palette_cmap = { 2538 0, 16, palette_red, palette_green, palette_blue, NULL 2539 }; 2540 2541 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table) 2542 { 2543 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2544 int i, j, k, depth; 2545 u8 val; 2546 2547 if (!fbcon_is_active(vc, info)) 2548 return; 2549 2550 if (!con_is_visible(vc)) 2551 return; 2552 2553 depth = fb_get_color_depth(&info->var, &info->fix); 2554 if (depth > 3) { 2555 for (i = j = 0; i < 16; i++) { 2556 k = table[i]; 2557 val = vc->vc_palette[j++]; 2558 palette_red[k] = (val << 8) | val; 2559 val = vc->vc_palette[j++]; 2560 palette_green[k] = (val << 8) | val; 2561 val = vc->vc_palette[j++]; 2562 palette_blue[k] = (val << 8) | val; 2563 } 2564 palette_cmap.len = 16; 2565 palette_cmap.start = 0; 2566 /* 2567 * If framebuffer is capable of less than 16 colors, 2568 * use default palette of fbcon. 2569 */ 2570 } else 2571 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap); 2572 2573 fb_set_cmap(&palette_cmap, info); 2574 } 2575 2576 /* As we might be inside of softback, we may work with non-contiguous buffer, 2577 that's why we have to use a separate routine. */ 2578 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt) 2579 { 2580 while (cnt--) { 2581 u16 a = scr_readw(p); 2582 if (!vc->vc_can_do_color) 2583 a ^= 0x0800; 2584 else if (vc->vc_hi_font_mask == 0x100) 2585 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | 2586 (((a) & 0x0e00) << 4); 2587 else 2588 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | 2589 (((a) & 0x0700) << 4); 2590 scr_writew(a, p++); 2591 } 2592 } 2593 2594 void fbcon_suspended(struct fb_info *info) 2595 { 2596 struct vc_data *vc = NULL; 2597 struct fbcon_par *par = info->fbcon_par; 2598 2599 if (!par || par->currcon < 0) 2600 return; 2601 vc = vc_cons[par->currcon].d; 2602 2603 /* Clear cursor, restore saved data when in text mode */ 2604 if ((vc->vc_mode == KD_TEXT) && con_is_visible(vc)) 2605 fbcon_cursor(vc, false); 2606 } 2607 2608 void fbcon_resumed(struct fb_info *info) 2609 { 2610 struct vc_data *vc; 2611 struct fbcon_par *par = info->fbcon_par; 2612 2613 if (!par || par->currcon < 0) 2614 return; 2615 vc = vc_cons[par->currcon].d; 2616 2617 /* Update screen when in text mode only */ 2618 if ((vc->vc_mode == KD_TEXT) && con_is_visible(vc)) 2619 update_screen(vc); 2620 } 2621 2622 static void fbcon_modechanged(struct fb_info *info) 2623 { 2624 struct fbcon_par *par = info->fbcon_par; 2625 struct vc_data *vc; 2626 struct fbcon_display *p; 2627 int rows, cols; 2628 2629 if (!par || par->currcon < 0) 2630 return; 2631 vc = vc_cons[par->currcon].d; 2632 if (vc->vc_mode != KD_TEXT || 2633 fbcon_info_from_console(par->currcon) != info) 2634 return; 2635 2636 p = &fb_display[vc->vc_num]; 2637 set_blitting_type(vc, info); 2638 2639 if (con_is_visible(vc)) { 2640 var_to_display(p, &info->var, info); 2641 cols = FBCON_SWAP(par->rotate, info->var.xres, info->var.yres); 2642 rows = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 2643 cols /= vc->vc_font.width; 2644 rows /= vc->vc_font.height; 2645 vc_resize(vc, cols, rows); 2646 updatescrollmode(p, info, vc); 2647 scrollback_max = 0; 2648 scrollback_current = 0; 2649 2650 if (fbcon_is_active(vc, info)) { 2651 par->var.xoffset = par->var.yoffset = p->yscroll = 0; 2652 par->bitops->update_start(info); 2653 } 2654 2655 fbcon_set_palette(vc, color_table); 2656 update_screen(vc); 2657 } 2658 } 2659 2660 static void fbcon_set_all_vcs(struct fb_info *info) 2661 { 2662 struct fbcon_par *par = info->fbcon_par; 2663 struct vc_data *vc; 2664 struct fbcon_display *p; 2665 int i, rows, cols, fg = -1; 2666 2667 if (!par || par->currcon < 0) 2668 return; 2669 2670 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2671 vc = vc_cons[i].d; 2672 if (!vc || vc->vc_mode != KD_TEXT || 2673 fbcon_info_from_console(i) != info) 2674 continue; 2675 2676 if (con_is_visible(vc)) { 2677 fg = i; 2678 continue; 2679 } 2680 2681 p = &fb_display[vc->vc_num]; 2682 set_blitting_type(vc, info); 2683 var_to_display(p, &info->var, info); 2684 cols = FBCON_SWAP(par->rotate, info->var.xres, info->var.yres); 2685 rows = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 2686 cols /= vc->vc_font.width; 2687 rows /= vc->vc_font.height; 2688 vc_resize(vc, cols, rows); 2689 } 2690 2691 if (fg != -1) 2692 fbcon_modechanged(info); 2693 } 2694 2695 2696 void fbcon_update_vcs(struct fb_info *info, bool all) 2697 { 2698 if (all) 2699 fbcon_set_all_vcs(info); 2700 else 2701 fbcon_modechanged(info); 2702 } 2703 2704 /* let fbcon check if it supports a new screen resolution */ 2705 int fbcon_modechange_possible(struct fb_info *info, struct fb_var_screeninfo *var) 2706 { 2707 struct fbcon_par *par = info->fbcon_par; 2708 struct vc_data *vc; 2709 unsigned int i; 2710 2711 WARN_CONSOLE_UNLOCKED(); 2712 2713 if (!par) 2714 return 0; 2715 2716 /* prevent setting a screen size which is smaller than font size */ 2717 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2718 vc = vc_cons[i].d; 2719 if (!vc || vc->vc_mode != KD_TEXT || 2720 fbcon_info_from_console(i) != info) 2721 continue; 2722 2723 if (vc->vc_font.width > FBCON_SWAP(var->rotate, var->xres, var->yres) || 2724 vc->vc_font.height > FBCON_SWAP(var->rotate, var->yres, var->xres)) 2725 return -EINVAL; 2726 } 2727 2728 return 0; 2729 } 2730 2731 int fbcon_mode_deleted(struct fb_info *info, 2732 struct fb_videomode *mode) 2733 { 2734 struct fb_info *fb_info; 2735 struct fbcon_display *p; 2736 int i, j, found = 0; 2737 2738 /* before deletion, ensure that mode is not in use */ 2739 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2740 j = con2fb_map[i]; 2741 if (j == -1) 2742 continue; 2743 fb_info = fbcon_registered_fb[j]; 2744 if (fb_info != info) 2745 continue; 2746 p = &fb_display[i]; 2747 if (!p || !p->mode) 2748 continue; 2749 if (fb_mode_is_equal(p->mode, mode)) { 2750 found = 1; 2751 break; 2752 } 2753 } 2754 return found; 2755 } 2756 2757 static void fbcon_delete_mode(struct fb_videomode *m) 2758 { 2759 struct fbcon_display *p; 2760 2761 for (int i = first_fb_vc; i <= last_fb_vc; i++) { 2762 p = &fb_display[i]; 2763 if (p->mode == m) 2764 p->mode = NULL; 2765 } 2766 } 2767 2768 void fbcon_delete_modelist(struct list_head *head) 2769 { 2770 struct fb_modelist *modelist; 2771 2772 list_for_each_entry(modelist, head, list) 2773 fbcon_delete_mode(&modelist->mode); 2774 } 2775 2776 #ifdef CONFIG_VT_HW_CONSOLE_BINDING 2777 static void fbcon_unbind(void) 2778 { 2779 int ret; 2780 2781 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc, 2782 fbcon_is_default); 2783 2784 if (!ret) 2785 fbcon_has_console_bind = false; 2786 } 2787 #else 2788 static inline void fbcon_unbind(void) {} 2789 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 2790 2791 void fbcon_fb_unbind(struct fb_info *info) 2792 { 2793 int i, new_idx = -1; 2794 int idx = info->node; 2795 2796 console_lock(); 2797 2798 if (!fbcon_has_console_bind) { 2799 console_unlock(); 2800 return; 2801 } 2802 2803 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2804 if (con2fb_map[i] != idx && 2805 con2fb_map[i] != -1) { 2806 new_idx = con2fb_map[i]; 2807 break; 2808 } 2809 } 2810 2811 if (new_idx != -1) { 2812 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2813 if (con2fb_map[i] == idx) 2814 set_con2fb_map(i, new_idx, 0); 2815 } 2816 } else { 2817 struct fb_info *info = fbcon_registered_fb[idx]; 2818 2819 /* This is sort of like set_con2fb_map, except it maps 2820 * the consoles to no device and then releases the 2821 * oldinfo to free memory and cancel the cursor blink 2822 * timer. I can imagine this just becoming part of 2823 * set_con2fb_map where new_idx is -1 2824 */ 2825 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2826 if (con2fb_map[i] == idx) { 2827 con2fb_map[i] = -1; 2828 if (!search_fb_in_map(idx)) { 2829 con2fb_release_oldinfo(vc_cons[i].d, 2830 info, NULL); 2831 } 2832 } 2833 } 2834 fbcon_unbind(); 2835 } 2836 2837 console_unlock(); 2838 } 2839 2840 void fbcon_fb_unregistered(struct fb_info *info) 2841 { 2842 int i, idx; 2843 2844 console_lock(); 2845 2846 if (info->device && dev_is_pci(info->device)) 2847 vga_switcheroo_client_fb_set(to_pci_dev(info->device), NULL); 2848 2849 fbcon_registered_fb[info->node] = NULL; 2850 fbcon_num_registered_fb--; 2851 2852 if (deferred_takeover) { 2853 console_unlock(); 2854 return; 2855 } 2856 2857 idx = info->node; 2858 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2859 if (con2fb_map[i] == idx) 2860 con2fb_map[i] = -1; 2861 } 2862 2863 if (idx == info_idx) { 2864 info_idx = -1; 2865 2866 fbcon_for_each_registered_fb(i) { 2867 info_idx = i; 2868 break; 2869 } 2870 } 2871 2872 if (info_idx != -1) { 2873 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2874 if (con2fb_map[i] == -1) 2875 con2fb_map[i] = info_idx; 2876 } 2877 } 2878 2879 if (primary_device == idx) 2880 primary_device = -1; 2881 2882 if (!fbcon_num_registered_fb) 2883 do_unregister_con_driver(&fb_con); 2884 console_unlock(); 2885 } 2886 2887 void fbcon_remap_all(struct fb_info *info) 2888 { 2889 int i, idx = info->node; 2890 2891 console_lock(); 2892 if (deferred_takeover) { 2893 for (i = first_fb_vc; i <= last_fb_vc; i++) 2894 con2fb_map_boot[i] = idx; 2895 fbcon_map_override(); 2896 console_unlock(); 2897 return; 2898 } 2899 2900 for (i = first_fb_vc; i <= last_fb_vc; i++) 2901 set_con2fb_map(i, idx, 0); 2902 2903 if (con_is_bound(&fb_con)) { 2904 printk(KERN_INFO "fbcon: Remapping primary device, " 2905 "fb%i, to tty %i-%i\n", idx, 2906 first_fb_vc + 1, last_fb_vc + 1); 2907 info_idx = idx; 2908 } 2909 console_unlock(); 2910 } 2911 2912 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 2913 static void fbcon_select_primary(struct fb_info *info) 2914 { 2915 if (!map_override && primary_device == -1 && 2916 video_is_primary_device(info->device)) { 2917 int i; 2918 2919 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n", 2920 info->fix.id, info->node); 2921 primary_device = info->node; 2922 2923 for (i = first_fb_vc; i <= last_fb_vc; i++) 2924 con2fb_map_boot[i] = primary_device; 2925 2926 if (con_is_bound(&fb_con)) { 2927 printk(KERN_INFO "fbcon: Remapping primary device, " 2928 "fb%i, to tty %i-%i\n", info->node, 2929 first_fb_vc + 1, last_fb_vc + 1); 2930 info_idx = primary_device; 2931 } 2932 } 2933 2934 } 2935 #else 2936 static inline void fbcon_select_primary(struct fb_info *info) 2937 { 2938 return; 2939 } 2940 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */ 2941 2942 static bool lockless_register_fb; 2943 module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400); 2944 MODULE_PARM_DESC(lockless_register_fb, 2945 "Lockless framebuffer registration for debugging [default=off]"); 2946 2947 /* called with console_lock held */ 2948 static int do_fb_registered(struct fb_info *info) 2949 { 2950 int ret = 0, i, idx; 2951 2952 WARN_CONSOLE_UNLOCKED(); 2953 2954 fbcon_registered_fb[info->node] = info; 2955 fbcon_num_registered_fb++; 2956 2957 idx = info->node; 2958 fbcon_select_primary(info); 2959 2960 if (deferred_takeover) { 2961 pr_info("fbcon: Deferring console take-over\n"); 2962 return 0; 2963 } 2964 2965 if (info_idx == -1) { 2966 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2967 if (con2fb_map_boot[i] == idx) { 2968 info_idx = idx; 2969 break; 2970 } 2971 } 2972 2973 if (info_idx != -1) 2974 ret = do_fbcon_takeover(1); 2975 } else { 2976 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2977 if (con2fb_map_boot[i] == idx) 2978 set_con2fb_map(i, idx, 0); 2979 } 2980 } 2981 2982 /* Set the fb info for vga_switcheroo clients. Does nothing otherwise. */ 2983 if (info->device && dev_is_pci(info->device)) 2984 vga_switcheroo_client_fb_set(to_pci_dev(info->device), info); 2985 2986 return ret; 2987 } 2988 2989 int fbcon_fb_registered(struct fb_info *info) 2990 { 2991 int ret; 2992 2993 if (!lockless_register_fb) 2994 console_lock(); 2995 else 2996 atomic_inc(&ignore_console_lock_warning); 2997 2998 ret = do_fb_registered(info); 2999 3000 if (!lockless_register_fb) 3001 console_unlock(); 3002 else 3003 atomic_dec(&ignore_console_lock_warning); 3004 3005 return ret; 3006 } 3007 3008 void fbcon_fb_blanked(struct fb_info *info, int blank) 3009 { 3010 struct fbcon_par *par = info->fbcon_par; 3011 struct vc_data *vc; 3012 3013 if (!par || par->currcon < 0) 3014 return; 3015 3016 vc = vc_cons[par->currcon].d; 3017 if (vc->vc_mode != KD_TEXT || fbcon_info_from_console(par->currcon) != info) 3018 return; 3019 3020 if (con_is_visible(vc)) { 3021 if (blank) 3022 do_blank_screen(0); 3023 else 3024 do_unblank_screen(0); 3025 } 3026 par->blank_state = blank; 3027 } 3028 3029 void fbcon_new_modelist(struct fb_info *info) 3030 { 3031 int i; 3032 struct vc_data *vc; 3033 struct fb_var_screeninfo var; 3034 const struct fb_videomode *mode; 3035 3036 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3037 if (fbcon_info_from_console(i) != info) 3038 continue; 3039 if (!fb_display[i].mode) 3040 continue; 3041 vc = vc_cons[i].d; 3042 display_to_var(&var, &fb_display[i]); 3043 mode = fb_find_nearest_mode(fb_display[i].mode, 3044 &info->modelist); 3045 fb_videomode_to_var(&var, mode); 3046 fbcon_set_disp(info, &var, vc->vc_num); 3047 } 3048 } 3049 3050 void fbcon_get_requirement(struct fb_info *info, 3051 struct fb_blit_caps *caps) 3052 { 3053 struct vc_data *vc; 3054 3055 if (caps->flags) { 3056 int i, charcnt; 3057 3058 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3059 vc = vc_cons[i].d; 3060 if (vc && vc->vc_mode == KD_TEXT && 3061 info->node == con2fb_map[i]) { 3062 set_bit(vc->vc_font.width - 1, caps->x); 3063 set_bit(vc->vc_font.height - 1, caps->y); 3064 charcnt = vc->vc_font.charcount; 3065 if (caps->len < charcnt) 3066 caps->len = charcnt; 3067 } 3068 } 3069 } else { 3070 vc = vc_cons[fg_console].d; 3071 3072 if (vc && vc->vc_mode == KD_TEXT && 3073 info->node == con2fb_map[fg_console]) { 3074 bitmap_zero(caps->x, FB_MAX_BLIT_WIDTH); 3075 set_bit(vc->vc_font.width - 1, caps->x); 3076 bitmap_zero(caps->y, FB_MAX_BLIT_HEIGHT); 3077 set_bit(vc->vc_font.height - 1, caps->y); 3078 caps->len = vc->vc_font.charcount; 3079 } 3080 } 3081 } 3082 3083 int fbcon_set_con2fb_map_ioctl(void __user *argp) 3084 { 3085 struct fb_con2fbmap con2fb; 3086 int ret; 3087 3088 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3089 return -EFAULT; 3090 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3091 return -EINVAL; 3092 if (con2fb.framebuffer >= FB_MAX) 3093 return -EINVAL; 3094 if (!fbcon_registered_fb[con2fb.framebuffer]) 3095 request_module("fb%d", con2fb.framebuffer); 3096 if (!fbcon_registered_fb[con2fb.framebuffer]) { 3097 return -EINVAL; 3098 } 3099 3100 console_lock(); 3101 ret = set_con2fb_map(con2fb.console - 1, 3102 con2fb.framebuffer, 1); 3103 console_unlock(); 3104 3105 return ret; 3106 } 3107 3108 int fbcon_get_con2fb_map_ioctl(void __user *argp) 3109 { 3110 struct fb_con2fbmap con2fb; 3111 3112 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3113 return -EFAULT; 3114 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3115 return -EINVAL; 3116 3117 console_lock(); 3118 con2fb.framebuffer = con2fb_map[con2fb.console - 1]; 3119 console_unlock(); 3120 3121 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; 3122 } 3123 3124 /* 3125 * The console `switch' structure for the frame buffer based console 3126 */ 3127 3128 static const struct consw fb_con = { 3129 .owner = THIS_MODULE, 3130 .con_startup = fbcon_startup, 3131 .con_init = fbcon_init, 3132 .con_deinit = fbcon_deinit, 3133 .con_clear = fbcon_clear, 3134 .con_putcs = fbcon_putcs, 3135 .con_cursor = fbcon_cursor, 3136 .con_scroll = fbcon_scroll, 3137 .con_switch = fbcon_switch, 3138 .con_blank = fbcon_blank, 3139 .con_font_set = fbcon_set_font, 3140 .con_font_get = fbcon_get_font, 3141 .con_font_default = fbcon_set_def_font, 3142 .con_set_palette = fbcon_set_palette, 3143 .con_invert_region = fbcon_invert_region, 3144 .con_resize = fbcon_resize, 3145 }; 3146 3147 static ssize_t rotate_store(struct device *device, 3148 struct device_attribute *attr, const char *buf, 3149 size_t count) 3150 { 3151 struct fb_info *info; 3152 int rotate, idx; 3153 char **last = NULL; 3154 3155 console_lock(); 3156 idx = con2fb_map[fg_console]; 3157 3158 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3159 goto err; 3160 3161 info = fbcon_registered_fb[idx]; 3162 rotate = simple_strtoul(buf, last, 0); 3163 fbcon_rotate(info, rotate); 3164 err: 3165 console_unlock(); 3166 return count; 3167 } 3168 3169 static ssize_t rotate_all_store(struct device *device, 3170 struct device_attribute *attr,const char *buf, 3171 size_t count) 3172 { 3173 struct fb_info *info; 3174 int rotate, idx; 3175 char **last = NULL; 3176 3177 console_lock(); 3178 idx = con2fb_map[fg_console]; 3179 3180 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3181 goto err; 3182 3183 info = fbcon_registered_fb[idx]; 3184 rotate = simple_strtoul(buf, last, 0); 3185 fbcon_rotate_all(info, rotate); 3186 err: 3187 console_unlock(); 3188 return count; 3189 } 3190 3191 static ssize_t rotate_show(struct device *device, 3192 struct device_attribute *attr,char *buf) 3193 { 3194 struct fb_info *info; 3195 int rotate = 0, idx; 3196 3197 console_lock(); 3198 idx = con2fb_map[fg_console]; 3199 3200 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3201 goto err; 3202 3203 info = fbcon_registered_fb[idx]; 3204 rotate = fbcon_get_rotate(info); 3205 err: 3206 console_unlock(); 3207 return sysfs_emit(buf, "%d\n", rotate); 3208 } 3209 3210 static ssize_t cursor_blink_show(struct device *device, 3211 struct device_attribute *attr, char *buf) 3212 { 3213 struct fb_info *info; 3214 struct fbcon_par *par; 3215 int idx, blink = -1; 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 par = info->fbcon_par; 3225 3226 if (!par) 3227 goto err; 3228 3229 blink = delayed_work_pending(&par->cursor_work); 3230 err: 3231 console_unlock(); 3232 return sysfs_emit(buf, "%d\n", blink); 3233 } 3234 3235 static ssize_t cursor_blink_store(struct device *device, 3236 struct device_attribute *attr, 3237 const char *buf, size_t count) 3238 { 3239 struct fb_info *info; 3240 char **last = NULL; 3241 bool blink; 3242 int idx; 3243 3244 console_lock(); 3245 idx = con2fb_map[fg_console]; 3246 3247 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3248 goto err; 3249 3250 info = fbcon_registered_fb[idx]; 3251 3252 if (!info->fbcon_par) 3253 goto err; 3254 3255 blink = simple_strtoul(buf, last, 0); 3256 3257 if (blink) { 3258 fbcon_cursor_blink = true; 3259 fbcon_add_cursor_work(info); 3260 } else { 3261 fbcon_cursor_blink = false; 3262 fbcon_del_cursor_work(info); 3263 } 3264 3265 err: 3266 console_unlock(); 3267 return count; 3268 } 3269 3270 static DEVICE_ATTR_RW(cursor_blink); 3271 static DEVICE_ATTR_RW(rotate); 3272 static DEVICE_ATTR_WO(rotate_all); 3273 3274 static struct attribute *fbcon_device_attrs[] = { 3275 &dev_attr_cursor_blink.attr, 3276 &dev_attr_rotate.attr, 3277 &dev_attr_rotate_all.attr, 3278 NULL 3279 }; 3280 3281 ATTRIBUTE_GROUPS(fbcon_device); 3282 3283 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3284 static void fbcon_register_existing_fbs(struct work_struct *work) 3285 { 3286 int i; 3287 3288 console_lock(); 3289 3290 deferred_takeover = false; 3291 logo_shown = FBCON_LOGO_DONTSHOW; 3292 3293 fbcon_for_each_registered_fb(i) 3294 do_fb_registered(fbcon_registered_fb[i]); 3295 3296 console_unlock(); 3297 } 3298 3299 static struct notifier_block fbcon_output_nb; 3300 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs); 3301 3302 static int fbcon_output_notifier(struct notifier_block *nb, 3303 unsigned long action, void *data) 3304 { 3305 WARN_CONSOLE_UNLOCKED(); 3306 3307 pr_info("fbcon: Taking over console\n"); 3308 3309 dummycon_unregister_output_notifier(&fbcon_output_nb); 3310 3311 /* We may get called in atomic context */ 3312 schedule_work(&fbcon_deferred_takeover_work); 3313 3314 return NOTIFY_OK; 3315 } 3316 #endif 3317 3318 static void fbcon_start(void) 3319 { 3320 WARN_CONSOLE_UNLOCKED(); 3321 3322 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3323 if (conswitchp != &dummy_con) 3324 deferred_takeover = false; 3325 3326 if (deferred_takeover) { 3327 fbcon_output_nb.notifier_call = fbcon_output_notifier; 3328 dummycon_register_output_notifier(&fbcon_output_nb); 3329 return; 3330 } 3331 #endif 3332 } 3333 3334 void __init fb_console_init(void) 3335 { 3336 int i; 3337 3338 console_lock(); 3339 fbcon_device = device_create_with_groups(fb_class, NULL, 3340 MKDEV(0, 0), NULL, 3341 fbcon_device_groups, "fbcon"); 3342 3343 if (IS_ERR(fbcon_device)) { 3344 printk(KERN_WARNING "Unable to create device " 3345 "for fbcon; errno = %ld\n", 3346 PTR_ERR(fbcon_device)); 3347 fbcon_device = NULL; 3348 } 3349 3350 for (i = 0; i < MAX_NR_CONSOLES; i++) 3351 con2fb_map[i] = -1; 3352 3353 fbcon_start(); 3354 console_unlock(); 3355 } 3356 3357 #ifdef MODULE 3358 3359 void __exit fb_console_exit(void) 3360 { 3361 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3362 console_lock(); 3363 if (deferred_takeover) 3364 dummycon_unregister_output_notifier(&fbcon_output_nb); 3365 console_unlock(); 3366 3367 cancel_work_sync(&fbcon_deferred_takeover_work); 3368 #endif 3369 3370 console_lock(); 3371 device_destroy(fb_class, MKDEV(0, 0)); 3372 3373 do_unregister_con_driver(&fb_con); 3374 console_unlock(); 3375 } 3376 #endif 3377