1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Framebuffer driver for EFI/UEFI based system 4 * 5 * (c) 2006 Edgar Hucek <gimli@dark-green.com> 6 * Original efi driver written by Gerd Knorr <kraxel@goldbach.in-berlin.de> 7 * 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/efi.h> 12 #include <linux/efi-bgrt.h> 13 #include <linux/errno.h> 14 #include <linux/fb.h> 15 #include <linux/pci.h> 16 #include <linux/platform_device.h> 17 #include <linux/printk.h> 18 #include <linux/screen_info.h> 19 #include <video/vga.h> 20 #include <asm/efi.h> 21 #include <drm/drm_utils.h> /* For drm_get_panel_orientation_quirk */ 22 #include <drm/drm_connector.h> /* For DRM_MODE_PANEL_ORIENTATION_* */ 23 24 struct bmp_file_header { 25 u16 id; 26 u32 file_size; 27 u32 reserved; 28 u32 bitmap_offset; 29 } __packed; 30 31 struct bmp_dib_header { 32 u32 dib_header_size; 33 s32 width; 34 s32 height; 35 u16 planes; 36 u16 bpp; 37 u32 compression; 38 u32 bitmap_size; 39 u32 horz_resolution; 40 u32 vert_resolution; 41 u32 colors_used; 42 u32 colors_important; 43 } __packed; 44 45 static bool use_bgrt = true; 46 static bool request_mem_succeeded = false; 47 static u64 mem_flags = EFI_MEMORY_WC | EFI_MEMORY_UC; 48 49 static struct fb_var_screeninfo efifb_defined = { 50 .activate = FB_ACTIVATE_NOW, 51 .height = -1, 52 .width = -1, 53 .right_margin = 32, 54 .upper_margin = 16, 55 .lower_margin = 4, 56 .vsync_len = 4, 57 .vmode = FB_VMODE_NONINTERLACED, 58 }; 59 60 static struct fb_fix_screeninfo efifb_fix = { 61 .id = "EFI VGA", 62 .type = FB_TYPE_PACKED_PIXELS, 63 .accel = FB_ACCEL_NONE, 64 .visual = FB_VISUAL_TRUECOLOR, 65 }; 66 67 static int efifb_setcolreg(unsigned regno, unsigned red, unsigned green, 68 unsigned blue, unsigned transp, 69 struct fb_info *info) 70 { 71 /* 72 * Set a single color register. The values supplied are 73 * already rounded down to the hardware's capabilities 74 * (according to the entries in the `var' structure). Return 75 * != 0 for invalid regno. 76 */ 77 78 if (regno >= info->cmap.len) 79 return 1; 80 81 if (regno < 16) { 82 red >>= 16 - info->var.red.length; 83 green >>= 16 - info->var.green.length; 84 blue >>= 16 - info->var.blue.length; 85 ((u32 *)(info->pseudo_palette))[regno] = 86 (red << info->var.red.offset) | 87 (green << info->var.green.offset) | 88 (blue << info->var.blue.offset); 89 } 90 return 0; 91 } 92 93 /* 94 * If fbcon deffered console takeover is configured, the intent is for the 95 * framebuffer to show the boot graphics (e.g. vendor logo) until there is some 96 * (error) message to display. But the boot graphics may have been destroyed by 97 * e.g. option ROM output, detect this and restore the boot graphics. 98 */ 99 #if defined CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER && \ 100 defined CONFIG_ACPI_BGRT 101 static void efifb_copy_bmp(u8 *src, u32 *dst, int width, struct screen_info *si) 102 { 103 u8 r, g, b; 104 105 while (width--) { 106 b = *src++; 107 g = *src++; 108 r = *src++; 109 *dst++ = (r << si->red_pos) | 110 (g << si->green_pos) | 111 (b << si->blue_pos); 112 } 113 } 114 115 #ifdef CONFIG_X86 116 /* 117 * On x86 some firmwares use a low non native resolution for the display when 118 * they have shown some text messages. While keeping the bgrt filled with info 119 * for the native resolution. If the bgrt image intended for the native 120 * resolution still fits, it will be displayed very close to the right edge of 121 * the display looking quite bad. This function checks for this. 122 */ 123 static bool efifb_bgrt_sanity_check(struct screen_info *si, u32 bmp_width) 124 { 125 static const int default_resolutions[][2] = { 126 { 800, 600 }, 127 { 1024, 768 }, 128 { 1280, 1024 }, 129 }; 130 u32 i, right_margin; 131 132 for (i = 0; i < ARRAY_SIZE(default_resolutions); i++) { 133 if (default_resolutions[i][0] == si->lfb_width && 134 default_resolutions[i][1] == si->lfb_height) 135 break; 136 } 137 /* If not a default resolution used for textmode, this should be fine */ 138 if (i >= ARRAY_SIZE(default_resolutions)) 139 return true; 140 141 /* If the right margin is 5 times smaller then the left one, reject */ 142 right_margin = si->lfb_width - (bgrt_tab.image_offset_x + bmp_width); 143 if (right_margin < (bgrt_tab.image_offset_x / 5)) 144 return false; 145 146 return true; 147 } 148 #else 149 static bool efifb_bgrt_sanity_check(struct screen_info *si, u32 bmp_width) 150 { 151 return true; 152 } 153 #endif 154 155 static void efifb_show_boot_graphics(struct fb_info *info) 156 { 157 u32 bmp_width, bmp_height, bmp_pitch, screen_pitch, dst_x, y, src_y; 158 struct screen_info *si = &screen_info; 159 struct bmp_file_header *file_header; 160 struct bmp_dib_header *dib_header; 161 void *bgrt_image = NULL; 162 u8 *dst = info->screen_base; 163 164 if (!use_bgrt) 165 return; 166 167 if (!bgrt_tab.image_address) { 168 pr_info("efifb: No BGRT, not showing boot graphics\n"); 169 return; 170 } 171 172 if (bgrt_tab.status & 0x06) { 173 pr_info("efifb: BGRT rotation bits set, not showing boot graphics\n"); 174 return; 175 } 176 177 /* Avoid flashing the logo if we're going to print std probe messages */ 178 if (console_loglevel > CONSOLE_LOGLEVEL_QUIET) 179 return; 180 181 /* bgrt_tab.status is unreliable, so we don't check it */ 182 183 if (si->lfb_depth != 32) { 184 pr_info("efifb: not 32 bits, not showing boot graphics\n"); 185 return; 186 } 187 188 bgrt_image = memremap(bgrt_tab.image_address, bgrt_image_size, 189 MEMREMAP_WB); 190 if (!bgrt_image) { 191 pr_warn("efifb: Ignoring BGRT: failed to map image memory\n"); 192 return; 193 } 194 195 if (bgrt_image_size < (sizeof(*file_header) + sizeof(*dib_header))) 196 goto error; 197 198 file_header = bgrt_image; 199 if (file_header->id != 0x4d42 || file_header->reserved != 0) 200 goto error; 201 202 dib_header = bgrt_image + sizeof(*file_header); 203 if (dib_header->dib_header_size != 40 || dib_header->width < 0 || 204 dib_header->planes != 1 || dib_header->bpp != 24 || 205 dib_header->compression != 0) 206 goto error; 207 208 bmp_width = dib_header->width; 209 bmp_height = abs(dib_header->height); 210 bmp_pitch = round_up(3 * bmp_width, 4); 211 screen_pitch = si->lfb_linelength; 212 213 if ((file_header->bitmap_offset + bmp_pitch * bmp_height) > 214 bgrt_image_size) 215 goto error; 216 217 if ((bgrt_tab.image_offset_x + bmp_width) > si->lfb_width || 218 (bgrt_tab.image_offset_y + bmp_height) > si->lfb_height) 219 goto error; 220 221 if (!efifb_bgrt_sanity_check(si, bmp_width)) 222 goto error; 223 224 pr_info("efifb: showing boot graphics\n"); 225 226 for (y = 0; y < si->lfb_height; y++, dst += si->lfb_linelength) { 227 /* Only background? */ 228 if (y < bgrt_tab.image_offset_y || 229 y >= (bgrt_tab.image_offset_y + bmp_height)) { 230 memset(dst, 0, 4 * si->lfb_width); 231 continue; 232 } 233 234 src_y = y - bgrt_tab.image_offset_y; 235 /* Positive header height means upside down row order */ 236 if (dib_header->height > 0) 237 src_y = (bmp_height - 1) - src_y; 238 239 memset(dst, 0, bgrt_tab.image_offset_x * 4); 240 dst_x = bgrt_tab.image_offset_x; 241 efifb_copy_bmp(bgrt_image + file_header->bitmap_offset + 242 src_y * bmp_pitch, 243 (u32 *)dst + dst_x, bmp_width, si); 244 dst_x += bmp_width; 245 memset((u32 *)dst + dst_x, 0, (si->lfb_width - dst_x) * 4); 246 } 247 248 memunmap(bgrt_image); 249 return; 250 251 error: 252 memunmap(bgrt_image); 253 pr_warn("efifb: Ignoring BGRT: unexpected or invalid BMP data\n"); 254 } 255 #else 256 static inline void efifb_show_boot_graphics(struct fb_info *info) {} 257 #endif 258 259 static void efifb_destroy(struct fb_info *info) 260 { 261 if (info->screen_base) { 262 if (mem_flags & (EFI_MEMORY_UC | EFI_MEMORY_WC)) 263 iounmap(info->screen_base); 264 else 265 memunmap(info->screen_base); 266 } 267 if (request_mem_succeeded) 268 release_mem_region(info->apertures->ranges[0].base, 269 info->apertures->ranges[0].size); 270 fb_dealloc_cmap(&info->cmap); 271 } 272 273 static struct fb_ops efifb_ops = { 274 .owner = THIS_MODULE, 275 .fb_destroy = efifb_destroy, 276 .fb_setcolreg = efifb_setcolreg, 277 .fb_fillrect = cfb_fillrect, 278 .fb_copyarea = cfb_copyarea, 279 .fb_imageblit = cfb_imageblit, 280 }; 281 282 static int efifb_setup(char *options) 283 { 284 char *this_opt; 285 286 if (options && *options) { 287 while ((this_opt = strsep(&options, ",")) != NULL) { 288 if (!*this_opt) continue; 289 290 efifb_setup_from_dmi(&screen_info, this_opt); 291 292 if (!strncmp(this_opt, "base:", 5)) 293 screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0); 294 else if (!strncmp(this_opt, "stride:", 7)) 295 screen_info.lfb_linelength = simple_strtoul(this_opt+7, NULL, 0) * 4; 296 else if (!strncmp(this_opt, "height:", 7)) 297 screen_info.lfb_height = simple_strtoul(this_opt+7, NULL, 0); 298 else if (!strncmp(this_opt, "width:", 6)) 299 screen_info.lfb_width = simple_strtoul(this_opt+6, NULL, 0); 300 else if (!strcmp(this_opt, "nowc")) 301 mem_flags &= ~EFI_MEMORY_WC; 302 else if (!strcmp(this_opt, "nobgrt")) 303 use_bgrt = false; 304 } 305 } 306 307 return 0; 308 } 309 310 static inline bool fb_base_is_valid(void) 311 { 312 if (screen_info.lfb_base) 313 return true; 314 315 if (!(screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)) 316 return false; 317 318 if (screen_info.ext_lfb_base) 319 return true; 320 321 return false; 322 } 323 324 #define efifb_attr_decl(name, fmt) \ 325 static ssize_t name##_show(struct device *dev, \ 326 struct device_attribute *attr, \ 327 char *buf) \ 328 { \ 329 return sprintf(buf, fmt "\n", (screen_info.lfb_##name)); \ 330 } \ 331 static DEVICE_ATTR_RO(name) 332 333 efifb_attr_decl(base, "0x%x"); 334 efifb_attr_decl(linelength, "%u"); 335 efifb_attr_decl(height, "%u"); 336 efifb_attr_decl(width, "%u"); 337 efifb_attr_decl(depth, "%u"); 338 339 static struct attribute *efifb_attrs[] = { 340 &dev_attr_base.attr, 341 &dev_attr_linelength.attr, 342 &dev_attr_width.attr, 343 &dev_attr_height.attr, 344 &dev_attr_depth.attr, 345 NULL 346 }; 347 ATTRIBUTE_GROUPS(efifb); 348 349 static bool pci_dev_disabled; /* FB base matches BAR of a disabled device */ 350 351 static struct pci_dev *efifb_pci_dev; /* dev with BAR covering the efifb */ 352 static struct resource *bar_resource; 353 static u64 bar_offset; 354 355 static int efifb_probe(struct platform_device *dev) 356 { 357 struct fb_info *info; 358 int err, orientation; 359 unsigned int size_vmode; 360 unsigned int size_remap; 361 unsigned int size_total; 362 char *option = NULL; 363 efi_memory_desc_t md; 364 365 if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI || pci_dev_disabled) 366 return -ENODEV; 367 368 if (fb_get_options("efifb", &option)) 369 return -ENODEV; 370 efifb_setup(option); 371 372 /* We don't get linelength from UGA Draw Protocol, only from 373 * EFI Graphics Protocol. So if it's not in DMI, and it's not 374 * passed in from the user, we really can't use the framebuffer. 375 */ 376 if (!screen_info.lfb_linelength) 377 return -ENODEV; 378 379 if (!screen_info.lfb_depth) 380 screen_info.lfb_depth = 32; 381 if (!screen_info.pages) 382 screen_info.pages = 1; 383 if (!fb_base_is_valid()) { 384 printk(KERN_DEBUG "efifb: invalid framebuffer address\n"); 385 return -ENODEV; 386 } 387 printk(KERN_INFO "efifb: probing for efifb\n"); 388 389 /* just assume they're all unset if any are */ 390 if (!screen_info.blue_size) { 391 screen_info.blue_size = 8; 392 screen_info.blue_pos = 0; 393 screen_info.green_size = 8; 394 screen_info.green_pos = 8; 395 screen_info.red_size = 8; 396 screen_info.red_pos = 16; 397 screen_info.rsvd_size = 8; 398 screen_info.rsvd_pos = 24; 399 } 400 401 efifb_fix.smem_start = screen_info.lfb_base; 402 403 if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) { 404 u64 ext_lfb_base; 405 406 ext_lfb_base = (u64)(unsigned long)screen_info.ext_lfb_base << 32; 407 efifb_fix.smem_start |= ext_lfb_base; 408 } 409 410 if (bar_resource && 411 bar_resource->start + bar_offset != efifb_fix.smem_start) { 412 dev_info(&efifb_pci_dev->dev, 413 "BAR has moved, updating efifb address\n"); 414 efifb_fix.smem_start = bar_resource->start + bar_offset; 415 } 416 417 efifb_defined.bits_per_pixel = screen_info.lfb_depth; 418 efifb_defined.xres = screen_info.lfb_width; 419 efifb_defined.yres = screen_info.lfb_height; 420 efifb_fix.line_length = screen_info.lfb_linelength; 421 422 /* size_vmode -- that is the amount of memory needed for the 423 * used video mode, i.e. the minimum amount of 424 * memory we need. */ 425 size_vmode = efifb_defined.yres * efifb_fix.line_length; 426 427 /* size_total -- all video memory we have. Used for 428 * entries, ressource allocation and bounds 429 * checking. */ 430 size_total = screen_info.lfb_size; 431 if (size_total < size_vmode) 432 size_total = size_vmode; 433 434 /* size_remap -- the amount of video memory we are going to 435 * use for efifb. With modern cards it is no 436 * option to simply use size_total as that 437 * wastes plenty of kernel address space. */ 438 size_remap = size_vmode * 2; 439 if (size_remap > size_total) 440 size_remap = size_total; 441 if (size_remap % PAGE_SIZE) 442 size_remap += PAGE_SIZE - (size_remap % PAGE_SIZE); 443 efifb_fix.smem_len = size_remap; 444 445 if (request_mem_region(efifb_fix.smem_start, size_remap, "efifb")) { 446 request_mem_succeeded = true; 447 } else { 448 /* We cannot make this fatal. Sometimes this comes from magic 449 spaces our resource handlers simply don't know about */ 450 pr_warn("efifb: cannot reserve video memory at 0x%lx\n", 451 efifb_fix.smem_start); 452 } 453 454 info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev); 455 if (!info) { 456 err = -ENOMEM; 457 goto err_release_mem; 458 } 459 platform_set_drvdata(dev, info); 460 info->pseudo_palette = info->par; 461 info->par = NULL; 462 463 info->apertures = alloc_apertures(1); 464 if (!info->apertures) { 465 err = -ENOMEM; 466 goto err_release_fb; 467 } 468 info->apertures->ranges[0].base = efifb_fix.smem_start; 469 info->apertures->ranges[0].size = size_remap; 470 471 if (efi_enabled(EFI_BOOT) && 472 !efi_mem_desc_lookup(efifb_fix.smem_start, &md)) { 473 if ((efifb_fix.smem_start + efifb_fix.smem_len) > 474 (md.phys_addr + (md.num_pages << EFI_PAGE_SHIFT))) { 475 pr_err("efifb: video memory @ 0x%lx spans multiple EFI memory regions\n", 476 efifb_fix.smem_start); 477 err = -EIO; 478 goto err_release_fb; 479 } 480 /* 481 * If the UEFI memory map covers the efifb region, we may only 482 * remap it using the attributes the memory map prescribes. 483 */ 484 md.attribute &= EFI_MEMORY_UC | EFI_MEMORY_WC | 485 EFI_MEMORY_WT | EFI_MEMORY_WB; 486 if (md.attribute) { 487 mem_flags |= EFI_MEMORY_WT | EFI_MEMORY_WB; 488 mem_flags &= md.attribute; 489 } 490 } 491 if (mem_flags & EFI_MEMORY_WC) 492 info->screen_base = ioremap_wc(efifb_fix.smem_start, 493 efifb_fix.smem_len); 494 else if (mem_flags & EFI_MEMORY_UC) 495 info->screen_base = ioremap(efifb_fix.smem_start, 496 efifb_fix.smem_len); 497 else if (mem_flags & EFI_MEMORY_WT) 498 info->screen_base = memremap(efifb_fix.smem_start, 499 efifb_fix.smem_len, MEMREMAP_WT); 500 else if (mem_flags & EFI_MEMORY_WB) 501 info->screen_base = memremap(efifb_fix.smem_start, 502 efifb_fix.smem_len, MEMREMAP_WB); 503 if (!info->screen_base) { 504 pr_err("efifb: abort, cannot remap video memory 0x%x @ 0x%lx\n", 505 efifb_fix.smem_len, efifb_fix.smem_start); 506 err = -EIO; 507 goto err_release_fb; 508 } 509 510 efifb_show_boot_graphics(info); 511 512 pr_info("efifb: framebuffer at 0x%lx, using %dk, total %dk\n", 513 efifb_fix.smem_start, size_remap/1024, size_total/1024); 514 pr_info("efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n", 515 efifb_defined.xres, efifb_defined.yres, 516 efifb_defined.bits_per_pixel, efifb_fix.line_length, 517 screen_info.pages); 518 519 efifb_defined.xres_virtual = efifb_defined.xres; 520 efifb_defined.yres_virtual = efifb_fix.smem_len / 521 efifb_fix.line_length; 522 pr_info("efifb: scrolling: redraw\n"); 523 efifb_defined.yres_virtual = efifb_defined.yres; 524 525 /* some dummy values for timing to make fbset happy */ 526 efifb_defined.pixclock = 10000000 / efifb_defined.xres * 527 1000 / efifb_defined.yres; 528 efifb_defined.left_margin = (efifb_defined.xres / 8) & 0xf8; 529 efifb_defined.hsync_len = (efifb_defined.xres / 8) & 0xf8; 530 531 efifb_defined.red.offset = screen_info.red_pos; 532 efifb_defined.red.length = screen_info.red_size; 533 efifb_defined.green.offset = screen_info.green_pos; 534 efifb_defined.green.length = screen_info.green_size; 535 efifb_defined.blue.offset = screen_info.blue_pos; 536 efifb_defined.blue.length = screen_info.blue_size; 537 efifb_defined.transp.offset = screen_info.rsvd_pos; 538 efifb_defined.transp.length = screen_info.rsvd_size; 539 540 pr_info("efifb: %s: " 541 "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n", 542 "Truecolor", 543 screen_info.rsvd_size, 544 screen_info.red_size, 545 screen_info.green_size, 546 screen_info.blue_size, 547 screen_info.rsvd_pos, 548 screen_info.red_pos, 549 screen_info.green_pos, 550 screen_info.blue_pos); 551 552 efifb_fix.ypanstep = 0; 553 efifb_fix.ywrapstep = 0; 554 555 info->fbops = &efifb_ops; 556 info->var = efifb_defined; 557 info->fix = efifb_fix; 558 info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE; 559 560 orientation = drm_get_panel_orientation_quirk(efifb_defined.xres, 561 efifb_defined.yres); 562 switch (orientation) { 563 default: 564 info->fbcon_rotate_hint = FB_ROTATE_UR; 565 break; 566 case DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP: 567 info->fbcon_rotate_hint = FB_ROTATE_UD; 568 break; 569 case DRM_MODE_PANEL_ORIENTATION_LEFT_UP: 570 info->fbcon_rotate_hint = FB_ROTATE_CCW; 571 break; 572 case DRM_MODE_PANEL_ORIENTATION_RIGHT_UP: 573 info->fbcon_rotate_hint = FB_ROTATE_CW; 574 break; 575 } 576 577 err = sysfs_create_groups(&dev->dev.kobj, efifb_groups); 578 if (err) { 579 pr_err("efifb: cannot add sysfs attrs\n"); 580 goto err_unmap; 581 } 582 err = fb_alloc_cmap(&info->cmap, 256, 0); 583 if (err < 0) { 584 pr_err("efifb: cannot allocate colormap\n"); 585 goto err_groups; 586 } 587 err = register_framebuffer(info); 588 if (err < 0) { 589 pr_err("efifb: cannot register framebuffer\n"); 590 goto err_fb_dealoc; 591 } 592 fb_info(info, "%s frame buffer device\n", info->fix.id); 593 return 0; 594 595 err_fb_dealoc: 596 fb_dealloc_cmap(&info->cmap); 597 err_groups: 598 sysfs_remove_groups(&dev->dev.kobj, efifb_groups); 599 err_unmap: 600 if (mem_flags & (EFI_MEMORY_UC | EFI_MEMORY_WC)) 601 iounmap(info->screen_base); 602 else 603 memunmap(info->screen_base); 604 err_release_fb: 605 framebuffer_release(info); 606 err_release_mem: 607 if (request_mem_succeeded) 608 release_mem_region(efifb_fix.smem_start, size_total); 609 return err; 610 } 611 612 static int efifb_remove(struct platform_device *pdev) 613 { 614 struct fb_info *info = platform_get_drvdata(pdev); 615 616 unregister_framebuffer(info); 617 sysfs_remove_groups(&pdev->dev.kobj, efifb_groups); 618 framebuffer_release(info); 619 620 return 0; 621 } 622 623 static struct platform_driver efifb_driver = { 624 .driver = { 625 .name = "efi-framebuffer", 626 }, 627 .probe = efifb_probe, 628 .remove = efifb_remove, 629 }; 630 631 builtin_platform_driver(efifb_driver); 632 633 #if defined(CONFIG_PCI) 634 635 static void record_efifb_bar_resource(struct pci_dev *dev, int idx, u64 offset) 636 { 637 u16 word; 638 639 efifb_pci_dev = dev; 640 641 pci_read_config_word(dev, PCI_COMMAND, &word); 642 if (!(word & PCI_COMMAND_MEMORY)) { 643 pci_dev_disabled = true; 644 dev_err(&dev->dev, 645 "BAR %d: assigned to efifb but device is disabled!\n", 646 idx); 647 return; 648 } 649 650 bar_resource = &dev->resource[idx]; 651 bar_offset = offset; 652 653 dev_info(&dev->dev, "BAR %d: assigned to efifb\n", idx); 654 } 655 656 static void efifb_fixup_resources(struct pci_dev *dev) 657 { 658 u64 base = screen_info.lfb_base; 659 u64 size = screen_info.lfb_size; 660 int i; 661 662 if (efifb_pci_dev || screen_info.orig_video_isVGA != VIDEO_TYPE_EFI) 663 return; 664 665 if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) 666 base |= (u64)screen_info.ext_lfb_base << 32; 667 668 if (!base) 669 return; 670 671 for (i = 0; i <= PCI_STD_RESOURCE_END; i++) { 672 struct resource *res = &dev->resource[i]; 673 674 if (!(res->flags & IORESOURCE_MEM)) 675 continue; 676 677 if (res->start <= base && res->end >= base + size - 1) { 678 record_efifb_bar_resource(dev, i, base - res->start); 679 break; 680 } 681 } 682 } 683 DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY, 684 16, efifb_fixup_resources); 685 686 #endif 687