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 p->mode = NULL; 1277 idx = con2fb_map[vc->vc_num]; 1278 1279 if (idx == -1) 1280 goto finished; 1281 1282 info = fbcon_registered_fb[idx]; 1283 1284 if (!info) 1285 goto finished; 1286 1287 par = info->fbcon_par; 1288 1289 if (!par) 1290 goto finished; 1291 1292 if (con_is_visible(vc)) 1293 fbcon_del_cursor_work(info); 1294 1295 par->initialized = false; 1296 finished: 1297 1298 fbcon_free_font(p); 1299 vc->vc_font.data = NULL; 1300 1301 if (vc->vc_hi_font_mask && vc->vc_screenbuf) 1302 set_vc_hi_font(vc, false); 1303 1304 if (!con_is_bound(&fb_con)) 1305 fbcon_release_all(); 1306 1307 if (vc->vc_num == logo_shown) 1308 logo_shown = FBCON_LOGO_CANSHOW; 1309 1310 return; 1311 } 1312 1313 /* ====================================================================== */ 1314 1315 /* fbcon_XXX routines - interface used by the world 1316 * 1317 * This system is now divided into two levels because of complications 1318 * caused by hardware scrolling. Top level functions: 1319 * 1320 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins() 1321 * 1322 * handles y values in range [0, scr_height-1] that correspond to real 1323 * screen positions. y_wrap shift means that first line of bitmap may be 1324 * anywhere on this display. These functions convert lineoffsets to 1325 * bitmap offsets and deal with the wrap-around case by splitting blits. 1326 * 1327 * fbcon_bmove_physical_8() -- These functions fast implementations 1328 * fbcon_clear_physical_8() -- of original fbcon_XXX fns. 1329 * fbcon_putc_physical_8() -- (font width != 8) may be added later 1330 * 1331 * WARNING: 1332 * 1333 * At the moment fbcon_putc() cannot blit across vertical wrap boundary 1334 * Implies should only really hardware scroll in rows. Only reason for 1335 * restriction is simplicity & efficiency at the moment. 1336 */ 1337 1338 static void __fbcon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx, 1339 unsigned int height, unsigned int width) 1340 { 1341 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1342 struct fbcon_par *par = info->fbcon_par; 1343 int fg, bg; 1344 struct fbcon_display *p = &fb_display[vc->vc_num]; 1345 u_int y_break; 1346 1347 if (!fbcon_is_active(vc, info)) 1348 return; 1349 1350 if (!height || !width) 1351 return; 1352 1353 if (sy < vc->vc_top && vc->vc_top == logo_lines) { 1354 vc->vc_top = 0; 1355 /* 1356 * If the font dimensions are not an integral of the display 1357 * dimensions then the par->clear below won't end up clearing 1358 * the margins. Call clear_margins here in case the logo 1359 * bitmap stretched into the margin area. 1360 */ 1361 fbcon_clear_margins(vc, 0); 1362 } 1363 1364 fg = get_color(vc, info, vc->vc_video_erase_char, 1); 1365 bg = get_color(vc, info, vc->vc_video_erase_char, 0); 1366 /* Split blits that cross physical y_wrap boundary */ 1367 1368 y_break = p->vrows - p->yscroll; 1369 if (sy < y_break && sy + height - 1 >= y_break) { 1370 u_int b = y_break - sy; 1371 par->bitops->clear(vc, info, real_y(p, sy), sx, b, width, fg, bg); 1372 par->bitops->clear(vc, info, real_y(p, sy + b), sx, height - b, 1373 width, fg, bg); 1374 } else 1375 par->bitops->clear(vc, info, real_y(p, sy), sx, height, width, fg, bg); 1376 } 1377 1378 static void fbcon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx, 1379 unsigned int width) 1380 { 1381 __fbcon_clear(vc, sy, sx, 1, width); 1382 } 1383 1384 static void fbcon_putcs(struct vc_data *vc, const u16 *s, unsigned int count, 1385 unsigned int ypos, unsigned int xpos) 1386 { 1387 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1388 struct fbcon_display *p = &fb_display[vc->vc_num]; 1389 struct fbcon_par *par = info->fbcon_par; 1390 1391 if (fbcon_is_active(vc, info)) 1392 par->bitops->putcs(vc, info, s, count, real_y(p, ypos), xpos, 1393 get_fg_color(vc, info, scr_readw(s)), 1394 get_bg_color(vc, info, scr_readw(s))); 1395 } 1396 1397 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only) 1398 { 1399 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1400 struct fbcon_par *par = info->fbcon_par; 1401 1402 if (fbcon_is_active(vc, info)) 1403 par->bitops->clear_margins(vc, info, margin_color, bottom_only); 1404 } 1405 1406 static void fbcon_cursor(struct vc_data *vc, bool enable) 1407 { 1408 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1409 struct fbcon_par *par = info->fbcon_par; 1410 int c = scr_readw((u16 *) vc->vc_pos); 1411 1412 par->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1413 1414 if (!fbcon_is_active(vc, info) || vc->vc_deccm != 1) 1415 return; 1416 1417 if (vc->vc_cursor_type & CUR_SW) 1418 fbcon_del_cursor_work(info); 1419 else 1420 fbcon_add_cursor_work(info); 1421 1422 par->cursor_flash = enable; 1423 1424 if (!par->bitops->cursor) 1425 return; 1426 1427 par->bitops->cursor(vc, info, enable, 1428 get_fg_color(vc, info, c), 1429 get_bg_color(vc, info, c)); 1430 } 1431 1432 static int scrollback_phys_max = 0; 1433 static int scrollback_max = 0; 1434 static int scrollback_current = 0; 1435 1436 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 1437 int unit) 1438 { 1439 struct fbcon_display *p, *t; 1440 struct vc_data **default_mode, *vc; 1441 struct vc_data *svc; 1442 struct fbcon_par *par = info->fbcon_par; 1443 int rows, cols, ret; 1444 1445 p = &fb_display[unit]; 1446 1447 vc = vc_cons[unit].d; 1448 1449 if (!vc) 1450 return; 1451 1452 if (var_to_display(p, var, info)) 1453 return; 1454 1455 default_mode = vc->vc_display_fg; 1456 svc = *default_mode; 1457 t = &fb_display[svc->vc_num]; 1458 1459 if (!p->fontdata) { 1460 vc->vc_font.data = font_data_buf(t->fontdata); 1461 vc->vc_font.width = (*default_mode)->vc_font.width; 1462 vc->vc_font.height = (*default_mode)->vc_font.height; 1463 vc->vc_font.charcount = (*default_mode)->vc_font.charcount; 1464 p->fontdata = t->fontdata; 1465 font_data_get(p->fontdata); 1466 } 1467 1468 var->activate = FB_ACTIVATE_NOW; 1469 info->var.activate = var->activate; 1470 var->yoffset = info->var.yoffset; 1471 var->xoffset = info->var.xoffset; 1472 fb_set_var(info, var); 1473 par->var = info->var; 1474 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1475 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1476 if (vc->vc_font.charcount == 256) { 1477 vc->vc_hi_font_mask = 0; 1478 } else { 1479 vc->vc_hi_font_mask = 0x100; 1480 if (vc->vc_can_do_color) 1481 vc->vc_complement_mask <<= 1; 1482 } 1483 1484 if (!*svc->uni_pagedict_loc) 1485 con_set_default_unimap(svc); 1486 if (!*vc->uni_pagedict_loc) 1487 con_copy_unimap(vc, svc); 1488 1489 cols = FBCON_SWAP(par->rotate, info->var.xres, info->var.yres); 1490 rows = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 1491 cols /= vc->vc_font.width; 1492 rows /= vc->vc_font.height; 1493 ret = vc_resize(vc, cols, rows); 1494 1495 if (con_is_visible(vc) && !ret) 1496 update_screen(vc); 1497 } 1498 1499 static __inline__ void ywrap_up(struct vc_data *vc, int count) 1500 { 1501 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1502 struct fbcon_par *par = info->fbcon_par; 1503 struct fbcon_display *p = &fb_display[vc->vc_num]; 1504 1505 p->yscroll += count; 1506 if (p->yscroll >= p->vrows) /* Deal with wrap */ 1507 p->yscroll -= p->vrows; 1508 par->var.xoffset = 0; 1509 par->var.yoffset = p->yscroll * vc->vc_font.height; 1510 par->var.vmode |= FB_VMODE_YWRAP; 1511 par->bitops->update_start(info); 1512 scrollback_max += count; 1513 if (scrollback_max > scrollback_phys_max) 1514 scrollback_max = scrollback_phys_max; 1515 scrollback_current = 0; 1516 } 1517 1518 static __inline__ void ywrap_down(struct vc_data *vc, int count) 1519 { 1520 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1521 struct fbcon_par *par = info->fbcon_par; 1522 struct fbcon_display *p = &fb_display[vc->vc_num]; 1523 1524 p->yscroll -= count; 1525 if (p->yscroll < 0) /* Deal with wrap */ 1526 p->yscroll += p->vrows; 1527 par->var.xoffset = 0; 1528 par->var.yoffset = p->yscroll * vc->vc_font.height; 1529 par->var.vmode |= FB_VMODE_YWRAP; 1530 par->bitops->update_start(info); 1531 scrollback_max -= count; 1532 if (scrollback_max < 0) 1533 scrollback_max = 0; 1534 scrollback_current = 0; 1535 } 1536 1537 static __inline__ void ypan_up(struct vc_data *vc, int count) 1538 { 1539 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1540 struct fbcon_display *p = &fb_display[vc->vc_num]; 1541 struct fbcon_par *par = info->fbcon_par; 1542 1543 p->yscroll += count; 1544 if (p->yscroll > p->vrows - vc->vc_rows) { 1545 par->bitops->bmove(vc, info, p->vrows - vc->vc_rows, 1546 0, 0, 0, vc->vc_rows, vc->vc_cols); 1547 p->yscroll -= p->vrows - vc->vc_rows; 1548 } 1549 1550 par->var.xoffset = 0; 1551 par->var.yoffset = p->yscroll * vc->vc_font.height; 1552 par->var.vmode &= ~FB_VMODE_YWRAP; 1553 par->bitops->update_start(info); 1554 fbcon_clear_margins(vc, 1); 1555 scrollback_max += count; 1556 if (scrollback_max > scrollback_phys_max) 1557 scrollback_max = scrollback_phys_max; 1558 scrollback_current = 0; 1559 } 1560 1561 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count) 1562 { 1563 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1564 struct fbcon_par *par = info->fbcon_par; 1565 struct fbcon_display *p = &fb_display[vc->vc_num]; 1566 1567 p->yscroll += count; 1568 1569 if (p->yscroll > p->vrows - vc->vc_rows) { 1570 p->yscroll -= p->vrows - vc->vc_rows; 1571 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t); 1572 } 1573 1574 par->var.xoffset = 0; 1575 par->var.yoffset = p->yscroll * vc->vc_font.height; 1576 par->var.vmode &= ~FB_VMODE_YWRAP; 1577 par->bitops->update_start(info); 1578 fbcon_clear_margins(vc, 1); 1579 scrollback_max += count; 1580 if (scrollback_max > scrollback_phys_max) 1581 scrollback_max = scrollback_phys_max; 1582 scrollback_current = 0; 1583 } 1584 1585 static __inline__ void ypan_down(struct vc_data *vc, int count) 1586 { 1587 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1588 struct fbcon_display *p = &fb_display[vc->vc_num]; 1589 struct fbcon_par *par = info->fbcon_par; 1590 1591 p->yscroll -= count; 1592 if (p->yscroll < 0) { 1593 par->bitops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows, 1594 0, vc->vc_rows, vc->vc_cols); 1595 p->yscroll += p->vrows - vc->vc_rows; 1596 } 1597 1598 par->var.xoffset = 0; 1599 par->var.yoffset = p->yscroll * vc->vc_font.height; 1600 par->var.vmode &= ~FB_VMODE_YWRAP; 1601 par->bitops->update_start(info); 1602 fbcon_clear_margins(vc, 1); 1603 scrollback_max -= count; 1604 if (scrollback_max < 0) 1605 scrollback_max = 0; 1606 scrollback_current = 0; 1607 } 1608 1609 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count) 1610 { 1611 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1612 struct fbcon_par *par = info->fbcon_par; 1613 struct fbcon_display *p = &fb_display[vc->vc_num]; 1614 1615 p->yscroll -= count; 1616 1617 if (p->yscroll < 0) { 1618 p->yscroll += p->vrows - vc->vc_rows; 1619 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count); 1620 } 1621 1622 par->var.xoffset = 0; 1623 par->var.yoffset = p->yscroll * vc->vc_font.height; 1624 par->var.vmode &= ~FB_VMODE_YWRAP; 1625 par->bitops->update_start(info); 1626 fbcon_clear_margins(vc, 1); 1627 scrollback_max -= count; 1628 if (scrollback_max < 0) 1629 scrollback_max = 0; 1630 scrollback_current = 0; 1631 } 1632 1633 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 1634 int line, int count, int dy) 1635 { 1636 unsigned short *s = (unsigned short *) 1637 (vc->vc_origin + vc->vc_size_row * line); 1638 1639 while (count--) { 1640 unsigned short *start = s; 1641 unsigned short *le = advance_row(s, 1); 1642 unsigned short c; 1643 int x = 0; 1644 unsigned short attr = 1; 1645 1646 do { 1647 c = scr_readw(s); 1648 if (attr != (c & 0xff00)) { 1649 attr = c & 0xff00; 1650 if (s > start) { 1651 fbcon_putcs(vc, start, s - start, 1652 dy, x); 1653 x += s - start; 1654 start = s; 1655 } 1656 } 1657 s++; 1658 } while (s < le); 1659 if (s > start) 1660 fbcon_putcs(vc, start, s - start, dy, x); 1661 dy++; 1662 } 1663 } 1664 1665 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info, 1666 struct fbcon_display *p, int line, int count, int ycount) 1667 { 1668 int offset = ycount * vc->vc_cols; 1669 unsigned short *d = (unsigned short *) 1670 (vc->vc_origin + vc->vc_size_row * line); 1671 unsigned short *s = d + offset; 1672 struct fbcon_par *par = info->fbcon_par; 1673 1674 while (count--) { 1675 unsigned short *start = s; 1676 unsigned short *le = advance_row(s, 1); 1677 unsigned short c; 1678 int x = 0; 1679 1680 do { 1681 c = scr_readw(s); 1682 1683 if (c == scr_readw(d)) { 1684 if (s > start) { 1685 par->bitops->bmove(vc, info, line + ycount, x, 1686 line, x, 1, s - start); 1687 x += s - start + 1; 1688 start = s + 1; 1689 } else { 1690 x++; 1691 start++; 1692 } 1693 } 1694 1695 scr_writew(c, d); 1696 s++; 1697 d++; 1698 } while (s < le); 1699 if (s > start) 1700 par->bitops->bmove(vc, info, line + ycount, x, line, x, 1, 1701 s - start); 1702 if (ycount > 0) 1703 line++; 1704 else { 1705 line--; 1706 /* NOTE: We subtract two lines from these pointers */ 1707 s -= vc->vc_size_row; 1708 d -= vc->vc_size_row; 1709 } 1710 } 1711 } 1712 1713 static void fbcon_redraw(struct vc_data *vc, int line, int count, int offset) 1714 { 1715 unsigned short *d = (unsigned short *) 1716 (vc->vc_origin + vc->vc_size_row * line); 1717 unsigned short *s = d + offset; 1718 1719 while (count--) { 1720 unsigned short *start = s; 1721 unsigned short *le = advance_row(s, 1); 1722 unsigned short c; 1723 int x = 0; 1724 unsigned short attr = 1; 1725 1726 do { 1727 c = scr_readw(s); 1728 if (attr != (c & 0xff00)) { 1729 attr = c & 0xff00; 1730 if (s > start) { 1731 fbcon_putcs(vc, start, s - start, 1732 line, x); 1733 x += s - start; 1734 start = s; 1735 } 1736 } 1737 if (c == scr_readw(d)) { 1738 if (s > start) { 1739 fbcon_putcs(vc, start, s - start, 1740 line, x); 1741 x += s - start + 1; 1742 start = s + 1; 1743 } else { 1744 x++; 1745 start++; 1746 } 1747 } 1748 scr_writew(c, d); 1749 s++; 1750 d++; 1751 } while (s < le); 1752 if (s > start) 1753 fbcon_putcs(vc, start, s - start, line, x); 1754 if (offset > 0) 1755 line++; 1756 else { 1757 line--; 1758 /* NOTE: We subtract two lines from these pointers */ 1759 s -= vc->vc_size_row; 1760 d -= vc->vc_size_row; 1761 } 1762 } 1763 } 1764 1765 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx, 1766 int dy, int dx, int height, int width, u_int y_break) 1767 { 1768 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1769 struct fbcon_par *par = info->fbcon_par; 1770 u_int b; 1771 1772 if (sy < y_break && sy + height > y_break) { 1773 b = y_break - sy; 1774 if (dy < sy) { /* Avoid trashing self */ 1775 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1776 y_break); 1777 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1778 height - b, width, y_break); 1779 } else { 1780 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1781 height - b, width, y_break); 1782 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1783 y_break); 1784 } 1785 return; 1786 } 1787 1788 if (dy < y_break && dy + height > y_break) { 1789 b = y_break - dy; 1790 if (dy < sy) { /* Avoid trashing self */ 1791 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1792 y_break); 1793 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1794 height - b, width, y_break); 1795 } else { 1796 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1797 height - b, width, y_break); 1798 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1799 y_break); 1800 } 1801 return; 1802 } 1803 par->bitops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx, 1804 height, width); 1805 } 1806 1807 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx, 1808 int height, int width) 1809 { 1810 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1811 struct fbcon_display *p = &fb_display[vc->vc_num]; 1812 1813 if (!fbcon_is_active(vc, info)) 1814 return; 1815 1816 if (!width || !height) 1817 return; 1818 1819 /* Split blits that cross physical y_wrap case. 1820 * Pathological case involves 4 blits, better to use recursive 1821 * code rather than unrolled case 1822 * 1823 * Recursive invocations don't need to erase the cursor over and 1824 * over again, so we use fbcon_bmove_rec() 1825 */ 1826 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width, 1827 p->vrows - p->yscroll); 1828 } 1829 1830 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b, 1831 enum con_scroll dir, unsigned int count) 1832 { 1833 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1834 struct fbcon_display *p = &fb_display[vc->vc_num]; 1835 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK; 1836 1837 if (!fbcon_is_active(vc, info)) 1838 return true; 1839 1840 fbcon_cursor(vc, false); 1841 1842 /* 1843 * ++Geert: Only use ywrap/ypan if the console is in text mode 1844 * ++Andrew: Only use ypan on hardware text mode when scrolling the 1845 * whole screen (prevents flicker). 1846 */ 1847 1848 switch (dir) { 1849 case SM_UP: 1850 if (count > vc->vc_rows) /* Maximum realistic size */ 1851 count = vc->vc_rows; 1852 switch (fb_scrollmode(p)) { 1853 case SCROLL_MOVE: 1854 fbcon_redraw_blit(vc, info, p, t, b - t - count, 1855 count); 1856 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1857 scr_memsetw((unsigned short *) (vc->vc_origin + 1858 vc->vc_size_row * 1859 (b - count)), 1860 vc->vc_video_erase_char, 1861 vc->vc_size_row * count); 1862 return true; 1863 1864 case SCROLL_WRAP_MOVE: 1865 if (b - t - count > 3 * vc->vc_rows >> 2) { 1866 if (t > 0) 1867 fbcon_bmove(vc, 0, 0, count, 0, t, 1868 vc->vc_cols); 1869 ywrap_up(vc, count); 1870 if (vc->vc_rows - b > 0) 1871 fbcon_bmove(vc, b - count, 0, b, 0, 1872 vc->vc_rows - b, 1873 vc->vc_cols); 1874 } else if (info->flags & FBINFO_READS_FAST) 1875 fbcon_bmove(vc, t + count, 0, t, 0, 1876 b - t - count, vc->vc_cols); 1877 else 1878 goto redraw_up; 1879 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1880 break; 1881 1882 case SCROLL_PAN_REDRAW: 1883 if ((p->yscroll + count <= 1884 2 * (p->vrows - vc->vc_rows)) 1885 && ((!scroll_partial && (b - t == vc->vc_rows)) 1886 || (scroll_partial 1887 && (b - t - count > 1888 3 * vc->vc_rows >> 2)))) { 1889 if (t > 0) 1890 fbcon_redraw_move(vc, p, 0, t, count); 1891 ypan_up_redraw(vc, t, count); 1892 if (vc->vc_rows - b > 0) 1893 fbcon_redraw_move(vc, p, b, 1894 vc->vc_rows - b, b); 1895 } else 1896 fbcon_redraw_move(vc, p, t + count, b - t - count, t); 1897 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1898 break; 1899 1900 case SCROLL_PAN_MOVE: 1901 if ((p->yscroll + count <= 1902 2 * (p->vrows - vc->vc_rows)) 1903 && ((!scroll_partial && (b - t == vc->vc_rows)) 1904 || (scroll_partial 1905 && (b - t - count > 1906 3 * vc->vc_rows >> 2)))) { 1907 if (t > 0) 1908 fbcon_bmove(vc, 0, 0, count, 0, t, 1909 vc->vc_cols); 1910 ypan_up(vc, count); 1911 if (vc->vc_rows - b > 0) 1912 fbcon_bmove(vc, b - count, 0, b, 0, 1913 vc->vc_rows - b, 1914 vc->vc_cols); 1915 } else if (info->flags & FBINFO_READS_FAST) 1916 fbcon_bmove(vc, t + count, 0, t, 0, 1917 b - t - count, vc->vc_cols); 1918 else 1919 goto redraw_up; 1920 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1921 break; 1922 1923 case SCROLL_REDRAW: 1924 redraw_up: 1925 fbcon_redraw(vc, t, b - t - count, 1926 count * vc->vc_cols); 1927 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1928 scr_memsetw((unsigned short *) (vc->vc_origin + 1929 vc->vc_size_row * 1930 (b - count)), 1931 vc->vc_video_erase_char, 1932 vc->vc_size_row * count); 1933 return true; 1934 } 1935 break; 1936 1937 case SM_DOWN: 1938 if (count > vc->vc_rows) /* Maximum realistic size */ 1939 count = vc->vc_rows; 1940 switch (fb_scrollmode(p)) { 1941 case SCROLL_MOVE: 1942 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count, 1943 -count); 1944 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1945 scr_memsetw((unsigned short *) (vc->vc_origin + 1946 vc->vc_size_row * 1947 t), 1948 vc->vc_video_erase_char, 1949 vc->vc_size_row * count); 1950 return true; 1951 1952 case SCROLL_WRAP_MOVE: 1953 if (b - t - count > 3 * vc->vc_rows >> 2) { 1954 if (vc->vc_rows - b > 0) 1955 fbcon_bmove(vc, b, 0, b - count, 0, 1956 vc->vc_rows - b, 1957 vc->vc_cols); 1958 ywrap_down(vc, count); 1959 if (t > 0) 1960 fbcon_bmove(vc, count, 0, 0, 0, t, 1961 vc->vc_cols); 1962 } else if (info->flags & FBINFO_READS_FAST) 1963 fbcon_bmove(vc, t, 0, t + count, 0, 1964 b - t - count, vc->vc_cols); 1965 else 1966 goto redraw_down; 1967 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1968 break; 1969 1970 case SCROLL_PAN_MOVE: 1971 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1972 && ((!scroll_partial && (b - t == vc->vc_rows)) 1973 || (scroll_partial 1974 && (b - t - count > 1975 3 * vc->vc_rows >> 2)))) { 1976 if (vc->vc_rows - b > 0) 1977 fbcon_bmove(vc, b, 0, b - count, 0, 1978 vc->vc_rows - b, 1979 vc->vc_cols); 1980 ypan_down(vc, count); 1981 if (t > 0) 1982 fbcon_bmove(vc, count, 0, 0, 0, t, 1983 vc->vc_cols); 1984 } else if (info->flags & FBINFO_READS_FAST) 1985 fbcon_bmove(vc, t, 0, t + count, 0, 1986 b - t - count, vc->vc_cols); 1987 else 1988 goto redraw_down; 1989 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1990 break; 1991 1992 case SCROLL_PAN_REDRAW: 1993 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1994 && ((!scroll_partial && (b - t == vc->vc_rows)) 1995 || (scroll_partial 1996 && (b - t - count > 1997 3 * vc->vc_rows >> 2)))) { 1998 if (vc->vc_rows - b > 0) 1999 fbcon_redraw_move(vc, p, b, vc->vc_rows - b, 2000 b - count); 2001 ypan_down_redraw(vc, t, count); 2002 if (t > 0) 2003 fbcon_redraw_move(vc, p, count, t, 0); 2004 } else 2005 fbcon_redraw_move(vc, p, t, b - t - count, t + count); 2006 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 2007 break; 2008 2009 case SCROLL_REDRAW: 2010 redraw_down: 2011 fbcon_redraw(vc, b - 1, b - t - count, 2012 -count * vc->vc_cols); 2013 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 2014 scr_memsetw((unsigned short *) (vc->vc_origin + 2015 vc->vc_size_row * 2016 t), 2017 vc->vc_video_erase_char, 2018 vc->vc_size_row * count); 2019 return true; 2020 } 2021 } 2022 return false; 2023 } 2024 2025 2026 static void updatescrollmode_accel(struct fbcon_display *p, 2027 struct fb_info *info, 2028 struct vc_data *vc) 2029 { 2030 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION 2031 struct fbcon_par *par = info->fbcon_par; 2032 int cap = info->flags; 2033 u16 t = 0; 2034 int ypan = FBCON_SWAP(par->rotate, info->fix.ypanstep, info->fix.xpanstep); 2035 int ywrap = FBCON_SWAP(par->rotate, info->fix.ywrapstep, t); 2036 int yres = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 2037 int vyres = FBCON_SWAP(par->rotate, info->var.yres_virtual, info->var.xres_virtual); 2038 int good_pan = (cap & FBINFO_HWACCEL_YPAN) && 2039 divides(ypan, vc->vc_font.height) && vyres > yres; 2040 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) && 2041 divides(ywrap, vc->vc_font.height) && 2042 divides(vc->vc_font.height, vyres) && 2043 divides(vc->vc_font.height, yres); 2044 int reading_fast = cap & FBINFO_READS_FAST; 2045 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) && 2046 !(cap & FBINFO_HWACCEL_DISABLED); 2047 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) && 2048 !(cap & FBINFO_HWACCEL_DISABLED); 2049 2050 if (good_wrap || good_pan) { 2051 if (reading_fast || fast_copyarea) 2052 p->scrollmode = good_wrap ? 2053 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE; 2054 else 2055 p->scrollmode = good_wrap ? SCROLL_REDRAW : 2056 SCROLL_PAN_REDRAW; 2057 } else { 2058 if (reading_fast || (fast_copyarea && !fast_imageblit)) 2059 p->scrollmode = SCROLL_MOVE; 2060 else 2061 p->scrollmode = SCROLL_REDRAW; 2062 } 2063 #endif 2064 } 2065 2066 static void updatescrollmode(struct fbcon_display *p, 2067 struct fb_info *info, 2068 struct vc_data *vc) 2069 { 2070 struct fbcon_par *par = info->fbcon_par; 2071 int fh = vc->vc_font.height; 2072 int yres = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 2073 int vyres = FBCON_SWAP(par->rotate, info->var.yres_virtual, info->var.xres_virtual); 2074 2075 p->vrows = vyres/fh; 2076 if (yres > (fh * (vc->vc_rows + 1))) 2077 p->vrows -= (yres - (fh * vc->vc_rows)) / fh; 2078 if ((yres % fh) && (vyres % fh < yres % fh)) 2079 p->vrows--; 2080 2081 /* update scrollmode in case hardware acceleration is used */ 2082 updatescrollmode_accel(p, info, vc); 2083 } 2084 2085 static int fbcon_resize(struct vc_data *vc, unsigned int width, 2086 unsigned int height, bool from_user) 2087 { 2088 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2089 struct fbcon_par *par = info->fbcon_par; 2090 struct fbcon_display *p = &fb_display[vc->vc_num]; 2091 struct fb_var_screeninfo var = info->var; 2092 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh; 2093 2094 if (font_data_size(p->fontdata)) { 2095 unsigned int size = vc_font_size(&vc->vc_font); 2096 2097 /* 2098 * If user font, ensure that a possible change to user font 2099 * height or width will not allow a font data out-of-bounds access. 2100 * NOTE: must use original charcount in calculation as font 2101 * charcount can change and cannot be used to determine the 2102 * font data allocated size. 2103 */ 2104 if (!size || size > font_data_size(p->fontdata)) 2105 return -EINVAL; 2106 } 2107 2108 virt_w = FBCON_SWAP(par->rotate, width, height); 2109 virt_h = FBCON_SWAP(par->rotate, height, width); 2110 virt_fw = FBCON_SWAP(par->rotate, vc->vc_font.width, vc->vc_font.height); 2111 virt_fh = FBCON_SWAP(par->rotate, vc->vc_font.height, vc->vc_font.width); 2112 var.xres = virt_w * virt_fw; 2113 var.yres = virt_h * virt_fh; 2114 x_diff = info->var.xres - var.xres; 2115 y_diff = info->var.yres - var.yres; 2116 if (x_diff < 0 || x_diff > virt_fw || 2117 y_diff < 0 || y_diff > virt_fh) { 2118 const struct fb_videomode *mode; 2119 2120 pr_debug("attempting resize %ix%i\n", var.xres, var.yres); 2121 mode = fb_find_best_mode(&var, &info->modelist); 2122 if (mode == NULL) 2123 return -EINVAL; 2124 display_to_var(&var, p); 2125 fb_videomode_to_var(&var, mode); 2126 2127 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh) 2128 return -EINVAL; 2129 2130 pr_debug("resize now %ix%i\n", var.xres, var.yres); 2131 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 2132 var.activate = FB_ACTIVATE_NOW | 2133 FB_ACTIVATE_FORCE; 2134 fb_set_var(info, &var); 2135 } 2136 var_to_display(p, &info->var, info); 2137 par->var = info->var; 2138 } 2139 updatescrollmode(p, info, vc); 2140 return 0; 2141 } 2142 2143 static bool fbcon_switch(struct vc_data *vc) 2144 { 2145 struct fb_info *info, *old_info = NULL; 2146 struct fbcon_par *par; 2147 struct fbcon_display *p = &fb_display[vc->vc_num]; 2148 struct fb_var_screeninfo var; 2149 int i, ret, prev_console; 2150 2151 info = fbcon_info_from_console(vc->vc_num); 2152 par = info->fbcon_par; 2153 2154 if (logo_shown >= 0) { 2155 struct vc_data *conp2 = vc_cons[logo_shown].d; 2156 2157 if (conp2->vc_top == logo_lines 2158 && conp2->vc_bottom == conp2->vc_rows) 2159 conp2->vc_top = 0; 2160 logo_shown = FBCON_LOGO_CANSHOW; 2161 } 2162 2163 prev_console = par->currcon; 2164 if (prev_console != -1) 2165 old_info = fbcon_info_from_console(prev_console); 2166 /* 2167 * FIXME: If we have multiple fbdev's loaded, we need to 2168 * update all info->currcon. Perhaps, we can place this 2169 * in a centralized structure, but this might break some 2170 * drivers. 2171 * 2172 * info->currcon = vc->vc_num; 2173 */ 2174 fbcon_for_each_registered_fb(i) { 2175 if (fbcon_registered_fb[i]->fbcon_par) { 2176 struct fbcon_par *par = fbcon_registered_fb[i]->fbcon_par; 2177 2178 par->currcon = vc->vc_num; 2179 } 2180 } 2181 memset(&var, 0, sizeof(struct fb_var_screeninfo)); 2182 display_to_var(&var, p); 2183 var.activate = FB_ACTIVATE_NOW; 2184 2185 /* 2186 * make sure we don't unnecessarily trip the memcmp() 2187 * in fb_set_var() 2188 */ 2189 info->var.activate = var.activate; 2190 var.vmode |= info->var.vmode & ~FB_VMODE_MASK; 2191 fb_set_var(info, &var); 2192 par->var = info->var; 2193 2194 if (old_info != NULL && (old_info != info || 2195 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) { 2196 if (info->fbops->fb_set_par) { 2197 ret = info->fbops->fb_set_par(info); 2198 2199 if (ret) 2200 printk(KERN_ERR "fbcon_switch: detected " 2201 "unhandled fb_set_par error, " 2202 "error code %d\n", ret); 2203 } 2204 2205 if (old_info != info) 2206 fbcon_del_cursor_work(old_info); 2207 } 2208 2209 if (!fbcon_is_active(vc, info) || par->blank_state != FB_BLANK_UNBLANK) 2210 fbcon_del_cursor_work(info); 2211 else 2212 fbcon_add_cursor_work(info); 2213 2214 set_blitting_type(vc, info); 2215 par->cursor_reset = 1; 2216 2217 if (par->bitops->rotate_font && par->bitops->rotate_font(info, vc)) { 2218 par->rotate = FB_ROTATE_UR; 2219 set_blitting_type(vc, info); 2220 } 2221 2222 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 2223 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 2224 2225 if (vc->vc_font.charcount > 256) 2226 vc->vc_complement_mask <<= 1; 2227 2228 updatescrollmode(p, info, vc); 2229 2230 switch (fb_scrollmode(p)) { 2231 case SCROLL_WRAP_MOVE: 2232 scrollback_phys_max = p->vrows - vc->vc_rows; 2233 break; 2234 case SCROLL_PAN_MOVE: 2235 case SCROLL_PAN_REDRAW: 2236 scrollback_phys_max = p->vrows - 2 * vc->vc_rows; 2237 if (scrollback_phys_max < 0) 2238 scrollback_phys_max = 0; 2239 break; 2240 default: 2241 scrollback_phys_max = 0; 2242 break; 2243 } 2244 2245 scrollback_max = 0; 2246 scrollback_current = 0; 2247 2248 if (fbcon_is_active(vc, info)) { 2249 par->var.xoffset = par->var.yoffset = p->yscroll = 0; 2250 par->bitops->update_start(info); 2251 } 2252 2253 fbcon_set_palette(vc, color_table); 2254 fbcon_clear_margins(vc, 0); 2255 2256 if (logo_shown == FBCON_LOGO_DRAW) { 2257 2258 logo_shown = fg_console; 2259 fb_show_logo(info, par->rotate); 2260 update_region(vc, 2261 vc->vc_origin + vc->vc_size_row * vc->vc_top, 2262 vc->vc_size_row * (vc->vc_bottom - 2263 vc->vc_top) / 2); 2264 return false; 2265 } 2266 return true; 2267 } 2268 2269 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info, 2270 int blank) 2271 { 2272 if (blank) { 2273 unsigned short charmask = vc->vc_hi_font_mask ? 2274 0x1ff : 0xff; 2275 unsigned short oldc; 2276 2277 oldc = vc->vc_video_erase_char; 2278 vc->vc_video_erase_char &= charmask; 2279 __fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols); 2280 vc->vc_video_erase_char = oldc; 2281 } 2282 } 2283 2284 static bool fbcon_blank(struct vc_data *vc, enum vesa_blank_mode blank, 2285 bool mode_switch) 2286 { 2287 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2288 struct fbcon_par *par = info->fbcon_par; 2289 2290 if (mode_switch) { 2291 struct fb_var_screeninfo var = info->var; 2292 2293 par->graphics = 1; 2294 2295 if (!blank) { 2296 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE | 2297 FB_ACTIVATE_KD_TEXT; 2298 fb_set_var(info, &var); 2299 par->graphics = 0; 2300 par->var = info->var; 2301 } 2302 } 2303 2304 if (fbcon_is_active(vc, info)) { 2305 if (par->blank_state != blank) { 2306 par->blank_state = blank; 2307 fbcon_cursor(vc, !blank); 2308 par->cursor_flash = (!blank); 2309 2310 if (fb_blank(info, blank)) 2311 fbcon_generic_blank(vc, info, blank); 2312 } 2313 2314 if (!blank) 2315 update_screen(vc); 2316 } 2317 2318 if (mode_switch || !fbcon_is_active(vc, info) || par->blank_state != FB_BLANK_UNBLANK) 2319 fbcon_del_cursor_work(info); 2320 else 2321 fbcon_add_cursor_work(info); 2322 2323 return false; 2324 } 2325 2326 static int fbcon_get_font(struct vc_data *vc, struct console_font *font, unsigned int vpitch) 2327 { 2328 const struct fbcon_display *p = &fb_display[vc->vc_num]; 2329 2330 font->width = vc->vc_font.width; 2331 font->height = vc->vc_font.height; 2332 if (font->height > vpitch) 2333 return -ENOSPC; 2334 font->charcount = vc->vc_hi_font_mask ? 512 : 256; 2335 2336 return font_data_export(p->fontdata, font, vpitch); 2337 } 2338 2339 /* set/clear vc_hi_font_mask and update vc attrs accordingly */ 2340 static void set_vc_hi_font(struct vc_data *vc, bool set) 2341 { 2342 if (!set) { 2343 vc->vc_hi_font_mask = 0; 2344 if (vc->vc_can_do_color) { 2345 vc->vc_complement_mask >>= 1; 2346 vc->vc_s_complement_mask >>= 1; 2347 } 2348 2349 /* ++Edmund: reorder the attribute bits */ 2350 if (vc->vc_can_do_color) { 2351 unsigned short *cp = 2352 (unsigned short *) vc->vc_origin; 2353 int count = vc->vc_screenbuf_size / 2; 2354 unsigned short c; 2355 for (; count > 0; count--, cp++) { 2356 c = scr_readw(cp); 2357 scr_writew(((c & 0xfe00) >> 1) | 2358 (c & 0xff), cp); 2359 } 2360 c = vc->vc_video_erase_char; 2361 vc->vc_video_erase_char = 2362 ((c & 0xfe00) >> 1) | (c & 0xff); 2363 vc->vc_attr >>= 1; 2364 } 2365 } else { 2366 vc->vc_hi_font_mask = 0x100; 2367 if (vc->vc_can_do_color) { 2368 vc->vc_complement_mask <<= 1; 2369 vc->vc_s_complement_mask <<= 1; 2370 } 2371 2372 /* ++Edmund: reorder the attribute bits */ 2373 { 2374 unsigned short *cp = 2375 (unsigned short *) vc->vc_origin; 2376 int count = vc->vc_screenbuf_size / 2; 2377 unsigned short c; 2378 for (; count > 0; count--, cp++) { 2379 unsigned short newc; 2380 c = scr_readw(cp); 2381 if (vc->vc_can_do_color) 2382 newc = 2383 ((c & 0xff00) << 1) | (c & 2384 0xff); 2385 else 2386 newc = c & ~0x100; 2387 scr_writew(newc, cp); 2388 } 2389 c = vc->vc_video_erase_char; 2390 if (vc->vc_can_do_color) { 2391 vc->vc_video_erase_char = 2392 ((c & 0xff00) << 1) | (c & 0xff); 2393 vc->vc_attr <<= 1; 2394 } else 2395 vc->vc_video_erase_char = c & ~0x100; 2396 } 2397 } 2398 } 2399 2400 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount, 2401 font_data_t *data) 2402 { 2403 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2404 struct fbcon_par *par = info->fbcon_par; 2405 struct fbcon_display *p = &fb_display[vc->vc_num]; 2406 int resize, ret, old_width, old_height, old_charcount; 2407 font_data_t *old_fontdata = p->fontdata; 2408 const u8 *old_data = vc->vc_font.data; 2409 unsigned short old_hi_font_mask = vc->vc_hi_font_mask; 2410 2411 font_data_get(data); 2412 2413 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height); 2414 p->fontdata = data; 2415 vc->vc_font.data = font_data_buf(p->fontdata); 2416 old_width = vc->vc_font.width; 2417 old_height = vc->vc_font.height; 2418 old_charcount = vc->vc_font.charcount; 2419 2420 vc->vc_font.width = w; 2421 vc->vc_font.height = h; 2422 vc->vc_font.charcount = charcount; 2423 if (vc->vc_hi_font_mask && charcount == 256) 2424 set_vc_hi_font(vc, false); 2425 else if (!vc->vc_hi_font_mask && charcount == 512) 2426 set_vc_hi_font(vc, true); 2427 2428 if (resize) { 2429 int cols, rows; 2430 2431 cols = FBCON_SWAP(par->rotate, info->var.xres, info->var.yres); 2432 rows = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 2433 cols /= w; 2434 rows /= h; 2435 ret = vc_resize(vc, cols, rows); 2436 if (ret) 2437 goto err_out; 2438 } else if (con_is_visible(vc) 2439 && vc->vc_mode == KD_TEXT) { 2440 fbcon_clear_margins(vc, 0); 2441 update_screen(vc); 2442 } 2443 2444 if (old_fontdata) 2445 font_data_put(old_fontdata); 2446 2447 return 0; 2448 2449 err_out: 2450 p->fontdata = old_fontdata; 2451 vc->vc_font.data = old_data; 2452 vc->vc_font.width = old_width; 2453 vc->vc_font.height = old_height; 2454 vc->vc_font.charcount = old_charcount; 2455 2456 /* Restore the hi_font state and screen buffer */ 2457 if (old_hi_font_mask && !vc->vc_hi_font_mask) 2458 set_vc_hi_font(vc, true); 2459 else if (!old_hi_font_mask && vc->vc_hi_font_mask) 2460 set_vc_hi_font(vc, false); 2461 2462 font_data_put(data); 2463 2464 return ret; 2465 } 2466 2467 /* 2468 * User asked to set font; we are guaranteed that charcount does not exceed 512 2469 * but lets not assume that, since charcount of 512 is small for unicode support. 2470 */ 2471 2472 static int fbcon_set_font(struct vc_data *vc, const struct console_font *font, 2473 unsigned int vpitch, unsigned int flags) 2474 { 2475 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2476 unsigned charcount = font->charcount; 2477 int w = font->width; 2478 int h = font->height; 2479 int i, ret; 2480 font_data_t *new_data; 2481 2482 /* Is there a reason why fbconsole couldn't handle any charcount >256? 2483 * If not this check should be changed to charcount < 256 */ 2484 if (charcount != 256 && charcount != 512) 2485 return -EINVAL; 2486 2487 /* font bigger than screen resolution ? */ 2488 if (w > FBCON_SWAP(info->var.rotate, info->var.xres, info->var.yres) || 2489 h > FBCON_SWAP(info->var.rotate, info->var.yres, info->var.xres)) 2490 return -EINVAL; 2491 2492 if (font->width > FB_MAX_BLIT_WIDTH || font->height > FB_MAX_BLIT_HEIGHT) 2493 return -EINVAL; 2494 2495 /* Make sure drawing engine can handle the font */ 2496 if (!test_bit(font->width - 1, info->pixmap.blit_x) || 2497 !test_bit(font->height - 1, info->pixmap.blit_y)) 2498 return -EINVAL; 2499 2500 /* Make sure driver can handle the font length */ 2501 if (fbcon_invalid_charcount(info, charcount)) 2502 return -EINVAL; 2503 2504 new_data = font_data_import(font, vpitch, crc32); 2505 if (IS_ERR(new_data)) 2506 return PTR_ERR(new_data); 2507 2508 /* Check if the same font is on some other console already */ 2509 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2510 if (fb_display[i].fontdata && 2511 font_data_is_equal(fb_display[i].fontdata, new_data)) { 2512 font_data_get(fb_display[i].fontdata); 2513 font_data_put(new_data); 2514 new_data = fb_display[i].fontdata; 2515 break; 2516 } 2517 } 2518 ret = fbcon_do_set_font(vc, font->width, font->height, charcount, new_data); 2519 font_data_put(new_data); 2520 2521 return ret; 2522 } 2523 2524 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, 2525 const char *name) 2526 { 2527 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2528 const struct font_desc *f; 2529 2530 if (!name) 2531 f = get_default_font(info->var.xres, info->var.yres, 2532 info->pixmap.blit_x, info->pixmap.blit_y); 2533 else if (!(f = find_font(name))) 2534 return -ENOENT; 2535 2536 font->width = f->width; 2537 font->height = f->height; 2538 return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data); 2539 } 2540 2541 static u16 palette_red[16]; 2542 static u16 palette_green[16]; 2543 static u16 palette_blue[16]; 2544 2545 static struct fb_cmap palette_cmap = { 2546 0, 16, palette_red, palette_green, palette_blue, NULL 2547 }; 2548 2549 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table) 2550 { 2551 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2552 int i, j, k, depth; 2553 u8 val; 2554 2555 if (!fbcon_is_active(vc, info)) 2556 return; 2557 2558 if (!con_is_visible(vc)) 2559 return; 2560 2561 depth = fb_get_color_depth(&info->var, &info->fix); 2562 if (depth > 3) { 2563 for (i = j = 0; i < 16; i++) { 2564 k = table[i]; 2565 val = vc->vc_palette[j++]; 2566 palette_red[k] = (val << 8) | val; 2567 val = vc->vc_palette[j++]; 2568 palette_green[k] = (val << 8) | val; 2569 val = vc->vc_palette[j++]; 2570 palette_blue[k] = (val << 8) | val; 2571 } 2572 palette_cmap.len = 16; 2573 palette_cmap.start = 0; 2574 /* 2575 * If framebuffer is capable of less than 16 colors, 2576 * use default palette of fbcon. 2577 */ 2578 } else 2579 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap); 2580 2581 fb_set_cmap(&palette_cmap, info); 2582 } 2583 2584 /* As we might be inside of softback, we may work with non-contiguous buffer, 2585 that's why we have to use a separate routine. */ 2586 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt) 2587 { 2588 while (cnt--) { 2589 u16 a = scr_readw(p); 2590 if (!vc->vc_can_do_color) 2591 a ^= 0x0800; 2592 else if (vc->vc_hi_font_mask == 0x100) 2593 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | 2594 (((a) & 0x0e00) << 4); 2595 else 2596 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | 2597 (((a) & 0x0700) << 4); 2598 scr_writew(a, p++); 2599 } 2600 } 2601 2602 void fbcon_suspended(struct fb_info *info) 2603 { 2604 struct vc_data *vc = NULL; 2605 struct fbcon_par *par = info->fbcon_par; 2606 2607 if (!par || par->currcon < 0) 2608 return; 2609 vc = vc_cons[par->currcon].d; 2610 2611 /* Clear cursor, restore saved data when in text mode */ 2612 if ((vc->vc_mode == KD_TEXT) && con_is_visible(vc)) 2613 fbcon_cursor(vc, false); 2614 } 2615 2616 void fbcon_resumed(struct fb_info *info) 2617 { 2618 struct vc_data *vc; 2619 struct fbcon_par *par = info->fbcon_par; 2620 2621 if (!par || par->currcon < 0) 2622 return; 2623 vc = vc_cons[par->currcon].d; 2624 2625 /* Update screen when in text mode only */ 2626 if ((vc->vc_mode == KD_TEXT) && con_is_visible(vc)) 2627 update_screen(vc); 2628 } 2629 2630 static void fbcon_modechanged(struct fb_info *info) 2631 { 2632 struct fbcon_par *par = info->fbcon_par; 2633 struct vc_data *vc; 2634 struct fbcon_display *p; 2635 int rows, cols; 2636 2637 if (!par || par->currcon < 0) 2638 return; 2639 vc = vc_cons[par->currcon].d; 2640 if (vc->vc_mode != KD_TEXT || 2641 fbcon_info_from_console(par->currcon) != info) 2642 return; 2643 2644 p = &fb_display[vc->vc_num]; 2645 set_blitting_type(vc, info); 2646 2647 if (con_is_visible(vc)) { 2648 var_to_display(p, &info->var, info); 2649 cols = FBCON_SWAP(par->rotate, info->var.xres, info->var.yres); 2650 rows = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 2651 cols /= vc->vc_font.width; 2652 rows /= vc->vc_font.height; 2653 vc_resize(vc, cols, rows); 2654 updatescrollmode(p, info, vc); 2655 scrollback_max = 0; 2656 scrollback_current = 0; 2657 2658 if (fbcon_is_active(vc, info)) { 2659 par->var.xoffset = par->var.yoffset = p->yscroll = 0; 2660 par->bitops->update_start(info); 2661 } 2662 2663 fbcon_set_palette(vc, color_table); 2664 update_screen(vc); 2665 } 2666 } 2667 2668 static void fbcon_set_all_vcs(struct fb_info *info) 2669 { 2670 struct fbcon_par *par = info->fbcon_par; 2671 struct vc_data *vc; 2672 struct fbcon_display *p; 2673 int i, rows, cols, fg = -1; 2674 2675 if (!par || par->currcon < 0) 2676 return; 2677 2678 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2679 vc = vc_cons[i].d; 2680 if (!vc || vc->vc_mode != KD_TEXT || 2681 fbcon_info_from_console(i) != info) 2682 continue; 2683 2684 if (con_is_visible(vc)) { 2685 fg = i; 2686 continue; 2687 } 2688 2689 p = &fb_display[vc->vc_num]; 2690 set_blitting_type(vc, info); 2691 var_to_display(p, &info->var, info); 2692 cols = FBCON_SWAP(par->rotate, info->var.xres, info->var.yres); 2693 rows = FBCON_SWAP(par->rotate, info->var.yres, info->var.xres); 2694 cols /= vc->vc_font.width; 2695 rows /= vc->vc_font.height; 2696 vc_resize(vc, cols, rows); 2697 } 2698 2699 if (fg != -1) 2700 fbcon_modechanged(info); 2701 } 2702 2703 2704 void fbcon_update_vcs(struct fb_info *info, bool all) 2705 { 2706 if (all) 2707 fbcon_set_all_vcs(info); 2708 else 2709 fbcon_modechanged(info); 2710 } 2711 2712 /* let fbcon check if it supports a new screen resolution */ 2713 int fbcon_modechange_possible(struct fb_info *info, struct fb_var_screeninfo *var) 2714 { 2715 struct fbcon_par *par = info->fbcon_par; 2716 struct vc_data *vc; 2717 unsigned int i; 2718 2719 WARN_CONSOLE_UNLOCKED(); 2720 2721 if (!par) 2722 return 0; 2723 2724 /* prevent setting a screen size which is smaller than font size */ 2725 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2726 vc = vc_cons[i].d; 2727 if (!vc || vc->vc_mode != KD_TEXT || 2728 fbcon_info_from_console(i) != info) 2729 continue; 2730 2731 if (vc->vc_font.width > FBCON_SWAP(var->rotate, var->xres, var->yres) || 2732 vc->vc_font.height > FBCON_SWAP(var->rotate, var->yres, var->xres)) 2733 return -EINVAL; 2734 } 2735 2736 return 0; 2737 } 2738 2739 int fbcon_mode_deleted(struct fb_info *info, 2740 struct fb_videomode *mode) 2741 { 2742 struct fb_info *fb_info; 2743 struct fbcon_display *p; 2744 int i, j, found = 0; 2745 2746 /* before deletion, ensure that mode is not in use */ 2747 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2748 j = con2fb_map[i]; 2749 if (j == -1) 2750 continue; 2751 fb_info = fbcon_registered_fb[j]; 2752 if (fb_info != info) 2753 continue; 2754 p = &fb_display[i]; 2755 if (!p || !p->mode) 2756 continue; 2757 if (fb_mode_is_equal(p->mode, mode)) { 2758 found = 1; 2759 break; 2760 } 2761 } 2762 return found; 2763 } 2764 2765 static void fbcon_delete_mode(struct fb_videomode *m) 2766 { 2767 struct fbcon_display *p; 2768 2769 for (int i = first_fb_vc; i <= last_fb_vc; i++) { 2770 p = &fb_display[i]; 2771 if (p->mode == m) 2772 p->mode = NULL; 2773 } 2774 } 2775 2776 void fbcon_delete_modelist(struct list_head *head) 2777 { 2778 struct fb_modelist *modelist; 2779 2780 list_for_each_entry(modelist, head, list) 2781 fbcon_delete_mode(&modelist->mode); 2782 } 2783 2784 #ifdef CONFIG_VT_HW_CONSOLE_BINDING 2785 static void fbcon_unbind(void) 2786 { 2787 int ret; 2788 2789 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc, 2790 fbcon_is_default); 2791 2792 if (!ret) 2793 fbcon_has_console_bind = false; 2794 } 2795 #else 2796 static inline void fbcon_unbind(void) {} 2797 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 2798 2799 void fbcon_fb_unbind(struct fb_info *info) 2800 { 2801 int i, new_idx = -1; 2802 int idx = info->node; 2803 2804 console_lock(); 2805 2806 if (!fbcon_has_console_bind) { 2807 console_unlock(); 2808 return; 2809 } 2810 2811 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2812 if (con2fb_map[i] != idx && 2813 con2fb_map[i] != -1) { 2814 new_idx = con2fb_map[i]; 2815 break; 2816 } 2817 } 2818 2819 if (new_idx != -1) { 2820 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2821 if (con2fb_map[i] == idx) 2822 set_con2fb_map(i, new_idx, 0); 2823 } 2824 } else { 2825 struct fb_info *info = fbcon_registered_fb[idx]; 2826 2827 /* This is sort of like set_con2fb_map, except it maps 2828 * the consoles to no device and then releases the 2829 * oldinfo to free memory and cancel the cursor blink 2830 * timer. I can imagine this just becoming part of 2831 * set_con2fb_map where new_idx is -1 2832 */ 2833 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2834 if (con2fb_map[i] == idx) { 2835 con2fb_map[i] = -1; 2836 if (!search_fb_in_map(idx)) { 2837 con2fb_release_oldinfo(vc_cons[i].d, 2838 info, NULL); 2839 } 2840 } 2841 } 2842 fbcon_unbind(); 2843 } 2844 2845 console_unlock(); 2846 } 2847 2848 void fbcon_fb_unregistered(struct fb_info *info) 2849 { 2850 int i, idx; 2851 2852 console_lock(); 2853 2854 if (info->device && dev_is_pci(info->device)) 2855 vga_switcheroo_client_fb_set(to_pci_dev(info->device), NULL); 2856 2857 fbcon_registered_fb[info->node] = NULL; 2858 fbcon_num_registered_fb--; 2859 2860 if (deferred_takeover) { 2861 console_unlock(); 2862 return; 2863 } 2864 2865 idx = info->node; 2866 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2867 if (con2fb_map[i] == idx) 2868 con2fb_map[i] = -1; 2869 } 2870 2871 if (idx == info_idx) { 2872 info_idx = -1; 2873 2874 fbcon_for_each_registered_fb(i) { 2875 info_idx = i; 2876 break; 2877 } 2878 } 2879 2880 if (info_idx != -1) { 2881 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2882 if (con2fb_map[i] == -1) 2883 con2fb_map[i] = info_idx; 2884 } 2885 } 2886 2887 if (primary_device == idx) 2888 primary_device = -1; 2889 2890 if (!fbcon_num_registered_fb) 2891 do_unregister_con_driver(&fb_con); 2892 console_unlock(); 2893 } 2894 2895 void fbcon_remap_all(struct fb_info *info) 2896 { 2897 int i, idx = info->node; 2898 2899 console_lock(); 2900 if (deferred_takeover) { 2901 for (i = first_fb_vc; i <= last_fb_vc; i++) 2902 con2fb_map_boot[i] = idx; 2903 fbcon_map_override(); 2904 console_unlock(); 2905 return; 2906 } 2907 2908 for (i = first_fb_vc; i <= last_fb_vc; i++) 2909 set_con2fb_map(i, idx, 0); 2910 2911 if (con_is_bound(&fb_con)) { 2912 printk(KERN_INFO "fbcon: Remapping primary device, " 2913 "fb%i, to tty %i-%i\n", idx, 2914 first_fb_vc + 1, last_fb_vc + 1); 2915 info_idx = idx; 2916 } 2917 console_unlock(); 2918 } 2919 2920 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 2921 static void fbcon_select_primary(struct fb_info *info) 2922 { 2923 if (!map_override && primary_device == -1 && 2924 video_is_primary_device(info->device)) { 2925 int i; 2926 2927 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n", 2928 info->fix.id, info->node); 2929 primary_device = info->node; 2930 2931 for (i = first_fb_vc; i <= last_fb_vc; i++) 2932 con2fb_map_boot[i] = primary_device; 2933 2934 if (con_is_bound(&fb_con)) { 2935 printk(KERN_INFO "fbcon: Remapping primary device, " 2936 "fb%i, to tty %i-%i\n", info->node, 2937 first_fb_vc + 1, last_fb_vc + 1); 2938 info_idx = primary_device; 2939 } 2940 } 2941 2942 } 2943 #else 2944 static inline void fbcon_select_primary(struct fb_info *info) 2945 { 2946 return; 2947 } 2948 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */ 2949 2950 static bool lockless_register_fb; 2951 module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400); 2952 MODULE_PARM_DESC(lockless_register_fb, 2953 "Lockless framebuffer registration for debugging [default=off]"); 2954 2955 /* called with console_lock held */ 2956 static int do_fb_registered(struct fb_info *info) 2957 { 2958 int ret = 0, i, idx; 2959 2960 WARN_CONSOLE_UNLOCKED(); 2961 2962 fbcon_registered_fb[info->node] = info; 2963 fbcon_num_registered_fb++; 2964 2965 idx = info->node; 2966 fbcon_select_primary(info); 2967 2968 if (deferred_takeover) { 2969 pr_info("fbcon: Deferring console take-over\n"); 2970 return 0; 2971 } 2972 2973 if (info_idx == -1) { 2974 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2975 if (con2fb_map_boot[i] == idx) { 2976 info_idx = idx; 2977 break; 2978 } 2979 } 2980 2981 if (info_idx != -1) 2982 ret = do_fbcon_takeover(1); 2983 } else { 2984 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2985 if (con2fb_map_boot[i] == idx) 2986 set_con2fb_map(i, idx, 0); 2987 } 2988 } 2989 2990 /* Set the fb info for vga_switcheroo clients. Does nothing otherwise. */ 2991 if (info->device && dev_is_pci(info->device)) 2992 vga_switcheroo_client_fb_set(to_pci_dev(info->device), info); 2993 2994 return ret; 2995 } 2996 2997 int fbcon_fb_registered(struct fb_info *info) 2998 { 2999 int ret; 3000 3001 if (!lockless_register_fb) 3002 console_lock(); 3003 else 3004 atomic_inc(&ignore_console_lock_warning); 3005 3006 ret = do_fb_registered(info); 3007 3008 if (!lockless_register_fb) 3009 console_unlock(); 3010 else 3011 atomic_dec(&ignore_console_lock_warning); 3012 3013 return ret; 3014 } 3015 3016 void fbcon_fb_blanked(struct fb_info *info, int blank) 3017 { 3018 struct fbcon_par *par = info->fbcon_par; 3019 struct vc_data *vc; 3020 3021 if (!par || par->currcon < 0) 3022 return; 3023 3024 vc = vc_cons[par->currcon].d; 3025 if (vc->vc_mode != KD_TEXT || fbcon_info_from_console(par->currcon) != info) 3026 return; 3027 3028 if (con_is_visible(vc)) { 3029 if (blank) 3030 do_blank_screen(0); 3031 else 3032 do_unblank_screen(0); 3033 } 3034 par->blank_state = blank; 3035 } 3036 3037 void fbcon_new_modelist(struct fb_info *info) 3038 { 3039 int i; 3040 struct vc_data *vc; 3041 struct fb_var_screeninfo var; 3042 const struct fb_videomode *mode; 3043 3044 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3045 if (fbcon_info_from_console(i) != info) 3046 continue; 3047 if (!fb_display[i].mode) 3048 continue; 3049 vc = vc_cons[i].d; 3050 display_to_var(&var, &fb_display[i]); 3051 mode = fb_find_nearest_mode(fb_display[i].mode, 3052 &info->modelist); 3053 fb_videomode_to_var(&var, mode); 3054 fbcon_set_disp(info, &var, vc->vc_num); 3055 } 3056 } 3057 3058 void fbcon_get_requirement(struct fb_info *info, 3059 struct fb_blit_caps *caps) 3060 { 3061 struct vc_data *vc; 3062 3063 if (caps->flags) { 3064 int i, charcnt; 3065 3066 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3067 vc = vc_cons[i].d; 3068 if (vc && vc->vc_mode == KD_TEXT && 3069 info->node == con2fb_map[i]) { 3070 set_bit(vc->vc_font.width - 1, caps->x); 3071 set_bit(vc->vc_font.height - 1, caps->y); 3072 charcnt = vc->vc_font.charcount; 3073 if (caps->len < charcnt) 3074 caps->len = charcnt; 3075 } 3076 } 3077 } else { 3078 vc = vc_cons[fg_console].d; 3079 3080 if (vc && vc->vc_mode == KD_TEXT && 3081 info->node == con2fb_map[fg_console]) { 3082 bitmap_zero(caps->x, FB_MAX_BLIT_WIDTH); 3083 set_bit(vc->vc_font.width - 1, caps->x); 3084 bitmap_zero(caps->y, FB_MAX_BLIT_HEIGHT); 3085 set_bit(vc->vc_font.height - 1, caps->y); 3086 caps->len = vc->vc_font.charcount; 3087 } 3088 } 3089 } 3090 3091 int fbcon_set_con2fb_map_ioctl(void __user *argp) 3092 { 3093 struct fb_con2fbmap con2fb; 3094 int ret; 3095 3096 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3097 return -EFAULT; 3098 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3099 return -EINVAL; 3100 if (con2fb.framebuffer >= FB_MAX) 3101 return -EINVAL; 3102 if (!fbcon_registered_fb[con2fb.framebuffer]) 3103 request_module("fb%d", con2fb.framebuffer); 3104 if (!fbcon_registered_fb[con2fb.framebuffer]) { 3105 return -EINVAL; 3106 } 3107 3108 console_lock(); 3109 ret = set_con2fb_map(con2fb.console - 1, 3110 con2fb.framebuffer, 1); 3111 console_unlock(); 3112 3113 return ret; 3114 } 3115 3116 int fbcon_get_con2fb_map_ioctl(void __user *argp) 3117 { 3118 struct fb_con2fbmap con2fb; 3119 3120 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3121 return -EFAULT; 3122 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3123 return -EINVAL; 3124 3125 console_lock(); 3126 con2fb.framebuffer = con2fb_map[con2fb.console - 1]; 3127 console_unlock(); 3128 3129 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; 3130 } 3131 3132 /* 3133 * The console `switch' structure for the frame buffer based console 3134 */ 3135 3136 static const struct consw fb_con = { 3137 .owner = THIS_MODULE, 3138 .con_startup = fbcon_startup, 3139 .con_init = fbcon_init, 3140 .con_deinit = fbcon_deinit, 3141 .con_clear = fbcon_clear, 3142 .con_putcs = fbcon_putcs, 3143 .con_cursor = fbcon_cursor, 3144 .con_scroll = fbcon_scroll, 3145 .con_switch = fbcon_switch, 3146 .con_blank = fbcon_blank, 3147 .con_font_set = fbcon_set_font, 3148 .con_font_get = fbcon_get_font, 3149 .con_font_default = fbcon_set_def_font, 3150 .con_set_palette = fbcon_set_palette, 3151 .con_invert_region = fbcon_invert_region, 3152 .con_resize = fbcon_resize, 3153 }; 3154 3155 static ssize_t rotate_store(struct device *device, 3156 struct device_attribute *attr, const char *buf, 3157 size_t count) 3158 { 3159 struct fb_info *info; 3160 int rotate, idx; 3161 char **last = NULL; 3162 3163 console_lock(); 3164 idx = con2fb_map[fg_console]; 3165 3166 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3167 goto err; 3168 3169 info = fbcon_registered_fb[idx]; 3170 rotate = simple_strtoul(buf, last, 0); 3171 fbcon_rotate(info, rotate); 3172 err: 3173 console_unlock(); 3174 return count; 3175 } 3176 3177 static ssize_t rotate_all_store(struct device *device, 3178 struct device_attribute *attr,const char *buf, 3179 size_t count) 3180 { 3181 struct fb_info *info; 3182 int rotate, idx; 3183 char **last = NULL; 3184 3185 console_lock(); 3186 idx = con2fb_map[fg_console]; 3187 3188 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3189 goto err; 3190 3191 info = fbcon_registered_fb[idx]; 3192 rotate = simple_strtoul(buf, last, 0); 3193 fbcon_rotate_all(info, rotate); 3194 err: 3195 console_unlock(); 3196 return count; 3197 } 3198 3199 static ssize_t rotate_show(struct device *device, 3200 struct device_attribute *attr,char *buf) 3201 { 3202 struct fb_info *info; 3203 int rotate = 0, idx; 3204 3205 console_lock(); 3206 idx = con2fb_map[fg_console]; 3207 3208 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3209 goto err; 3210 3211 info = fbcon_registered_fb[idx]; 3212 rotate = fbcon_get_rotate(info); 3213 err: 3214 console_unlock(); 3215 return sysfs_emit(buf, "%d\n", rotate); 3216 } 3217 3218 static ssize_t cursor_blink_show(struct device *device, 3219 struct device_attribute *attr, char *buf) 3220 { 3221 struct fb_info *info; 3222 struct fbcon_par *par; 3223 int idx, blink = -1; 3224 3225 console_lock(); 3226 idx = con2fb_map[fg_console]; 3227 3228 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3229 goto err; 3230 3231 info = fbcon_registered_fb[idx]; 3232 par = info->fbcon_par; 3233 3234 if (!par) 3235 goto err; 3236 3237 blink = delayed_work_pending(&par->cursor_work); 3238 err: 3239 console_unlock(); 3240 return sysfs_emit(buf, "%d\n", blink); 3241 } 3242 3243 static ssize_t cursor_blink_store(struct device *device, 3244 struct device_attribute *attr, 3245 const char *buf, size_t count) 3246 { 3247 struct fb_info *info; 3248 char **last = NULL; 3249 bool blink; 3250 int idx; 3251 3252 console_lock(); 3253 idx = con2fb_map[fg_console]; 3254 3255 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3256 goto err; 3257 3258 info = fbcon_registered_fb[idx]; 3259 3260 if (!info->fbcon_par) 3261 goto err; 3262 3263 blink = simple_strtoul(buf, last, 0); 3264 3265 if (blink) { 3266 fbcon_cursor_blink = true; 3267 fbcon_add_cursor_work(info); 3268 } else { 3269 fbcon_cursor_blink = false; 3270 fbcon_del_cursor_work(info); 3271 } 3272 3273 err: 3274 console_unlock(); 3275 return count; 3276 } 3277 3278 static DEVICE_ATTR_RW(cursor_blink); 3279 static DEVICE_ATTR_RW(rotate); 3280 static DEVICE_ATTR_WO(rotate_all); 3281 3282 static struct attribute *fbcon_device_attrs[] = { 3283 &dev_attr_cursor_blink.attr, 3284 &dev_attr_rotate.attr, 3285 &dev_attr_rotate_all.attr, 3286 NULL 3287 }; 3288 3289 ATTRIBUTE_GROUPS(fbcon_device); 3290 3291 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3292 static void fbcon_register_existing_fbs(struct work_struct *work) 3293 { 3294 int i; 3295 3296 console_lock(); 3297 3298 deferred_takeover = false; 3299 logo_shown = FBCON_LOGO_DONTSHOW; 3300 3301 fbcon_for_each_registered_fb(i) 3302 do_fb_registered(fbcon_registered_fb[i]); 3303 3304 console_unlock(); 3305 } 3306 3307 static struct notifier_block fbcon_output_nb; 3308 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs); 3309 3310 static int fbcon_output_notifier(struct notifier_block *nb, 3311 unsigned long action, void *data) 3312 { 3313 WARN_CONSOLE_UNLOCKED(); 3314 3315 pr_info("fbcon: Taking over console\n"); 3316 3317 dummycon_unregister_output_notifier(&fbcon_output_nb); 3318 3319 /* We may get called in atomic context */ 3320 schedule_work(&fbcon_deferred_takeover_work); 3321 3322 return NOTIFY_OK; 3323 } 3324 #endif 3325 3326 static void fbcon_start(void) 3327 { 3328 WARN_CONSOLE_UNLOCKED(); 3329 3330 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3331 if (conswitchp != &dummy_con) 3332 deferred_takeover = false; 3333 3334 if (deferred_takeover) { 3335 fbcon_output_nb.notifier_call = fbcon_output_notifier; 3336 dummycon_register_output_notifier(&fbcon_output_nb); 3337 return; 3338 } 3339 #endif 3340 } 3341 3342 void __init fb_console_init(void) 3343 { 3344 int i; 3345 3346 console_lock(); 3347 fbcon_device = device_create_with_groups(fb_class, NULL, 3348 MKDEV(0, 0), NULL, 3349 fbcon_device_groups, "fbcon"); 3350 3351 if (IS_ERR(fbcon_device)) { 3352 printk(KERN_WARNING "Unable to create device " 3353 "for fbcon; errno = %ld\n", 3354 PTR_ERR(fbcon_device)); 3355 fbcon_device = NULL; 3356 } 3357 3358 for (i = 0; i < MAX_NR_CONSOLES; i++) 3359 con2fb_map[i] = -1; 3360 3361 fbcon_start(); 3362 console_unlock(); 3363 } 3364 3365 #ifdef MODULE 3366 3367 void __exit fb_console_exit(void) 3368 { 3369 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3370 console_lock(); 3371 if (deferred_takeover) 3372 dummycon_unregister_output_notifier(&fbcon_output_nb); 3373 console_unlock(); 3374 3375 cancel_work_sync(&fbcon_deferred_takeover_work); 3376 #endif 3377 3378 console_lock(); 3379 device_destroy(fb_class, MKDEV(0, 0)); 3380 3381 do_unregister_con_driver(&fb_con); 3382 console_unlock(); 3383 } 3384 #endif 3385