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 /* Avoid flashing the logo if we're going to print std probe messages */ 173 if (console_loglevel > CONSOLE_LOGLEVEL_QUIET) 174 return; 175 176 /* bgrt_tab.status is unreliable, so we don't check it */ 177 178 if (si->lfb_depth != 32) { 179 pr_info("efifb: not 32 bits, not showing boot graphics\n"); 180 return; 181 } 182 183 bgrt_image = memremap(bgrt_tab.image_address, bgrt_image_size, 184 MEMREMAP_WB); 185 if (!bgrt_image) { 186 pr_warn("efifb: Ignoring BGRT: failed to map image memory\n"); 187 return; 188 } 189 190 if (bgrt_image_size < (sizeof(*file_header) + sizeof(*dib_header))) 191 goto error; 192 193 file_header = bgrt_image; 194 if (file_header->id != 0x4d42 || file_header->reserved != 0) 195 goto error; 196 197 dib_header = bgrt_image + sizeof(*file_header); 198 if (dib_header->dib_header_size != 40 || dib_header->width < 0 || 199 dib_header->planes != 1 || dib_header->bpp != 24 || 200 dib_header->compression != 0) 201 goto error; 202 203 bmp_width = dib_header->width; 204 bmp_height = abs(dib_header->height); 205 bmp_pitch = round_up(3 * bmp_width, 4); 206 screen_pitch = si->lfb_linelength; 207 208 if ((file_header->bitmap_offset + bmp_pitch * bmp_height) > 209 bgrt_image_size) 210 goto error; 211 212 if ((bgrt_tab.image_offset_x + bmp_width) > si->lfb_width || 213 (bgrt_tab.image_offset_y + bmp_height) > si->lfb_height) 214 goto error; 215 216 if (!efifb_bgrt_sanity_check(si, bmp_width)) 217 goto error; 218 219 pr_info("efifb: showing boot graphics\n"); 220 221 for (y = 0; y < si->lfb_height; y++, dst += si->lfb_linelength) { 222 /* Only background? */ 223 if (y < bgrt_tab.image_offset_y || 224 y >= (bgrt_tab.image_offset_y + bmp_height)) { 225 memset(dst, 0, 4 * si->lfb_width); 226 continue; 227 } 228 229 src_y = y - bgrt_tab.image_offset_y; 230 /* Positive header height means upside down row order */ 231 if (dib_header->height > 0) 232 src_y = (bmp_height - 1) - src_y; 233 234 memset(dst, 0, bgrt_tab.image_offset_x * 4); 235 dst_x = bgrt_tab.image_offset_x; 236 efifb_copy_bmp(bgrt_image + file_header->bitmap_offset + 237 src_y * bmp_pitch, 238 (u32 *)dst + dst_x, bmp_width, si); 239 dst_x += bmp_width; 240 memset((u32 *)dst + dst_x, 0, (si->lfb_width - dst_x) * 4); 241 } 242 243 memunmap(bgrt_image); 244 return; 245 246 error: 247 memunmap(bgrt_image); 248 pr_warn("efifb: Ignoring BGRT: unexpected or invalid BMP data\n"); 249 } 250 #else 251 static inline void efifb_show_boot_graphics(struct fb_info *info) {} 252 #endif 253 254 static void efifb_destroy(struct fb_info *info) 255 { 256 if (info->screen_base) { 257 if (mem_flags & (EFI_MEMORY_UC | EFI_MEMORY_WC)) 258 iounmap(info->screen_base); 259 else 260 memunmap(info->screen_base); 261 } 262 if (request_mem_succeeded) 263 release_mem_region(info->apertures->ranges[0].base, 264 info->apertures->ranges[0].size); 265 fb_dealloc_cmap(&info->cmap); 266 } 267 268 static struct fb_ops efifb_ops = { 269 .owner = THIS_MODULE, 270 .fb_destroy = efifb_destroy, 271 .fb_setcolreg = efifb_setcolreg, 272 .fb_fillrect = cfb_fillrect, 273 .fb_copyarea = cfb_copyarea, 274 .fb_imageblit = cfb_imageblit, 275 }; 276 277 static int efifb_setup(char *options) 278 { 279 char *this_opt; 280 281 if (options && *options) { 282 while ((this_opt = strsep(&options, ",")) != NULL) { 283 if (!*this_opt) continue; 284 285 efifb_setup_from_dmi(&screen_info, this_opt); 286 287 if (!strncmp(this_opt, "base:", 5)) 288 screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0); 289 else if (!strncmp(this_opt, "stride:", 7)) 290 screen_info.lfb_linelength = simple_strtoul(this_opt+7, NULL, 0) * 4; 291 else if (!strncmp(this_opt, "height:", 7)) 292 screen_info.lfb_height = simple_strtoul(this_opt+7, NULL, 0); 293 else if (!strncmp(this_opt, "width:", 6)) 294 screen_info.lfb_width = simple_strtoul(this_opt+6, NULL, 0); 295 else if (!strcmp(this_opt, "nowc")) 296 mem_flags &= ~EFI_MEMORY_WC; 297 else if (!strcmp(this_opt, "nobgrt")) 298 use_bgrt = false; 299 } 300 } 301 302 return 0; 303 } 304 305 static inline bool fb_base_is_valid(void) 306 { 307 if (screen_info.lfb_base) 308 return true; 309 310 if (!(screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)) 311 return false; 312 313 if (screen_info.ext_lfb_base) 314 return true; 315 316 return false; 317 } 318 319 #define efifb_attr_decl(name, fmt) \ 320 static ssize_t name##_show(struct device *dev, \ 321 struct device_attribute *attr, \ 322 char *buf) \ 323 { \ 324 return sprintf(buf, fmt "\n", (screen_info.lfb_##name)); \ 325 } \ 326 static DEVICE_ATTR_RO(name) 327 328 efifb_attr_decl(base, "0x%x"); 329 efifb_attr_decl(linelength, "%u"); 330 efifb_attr_decl(height, "%u"); 331 efifb_attr_decl(width, "%u"); 332 efifb_attr_decl(depth, "%u"); 333 334 static struct attribute *efifb_attrs[] = { 335 &dev_attr_base.attr, 336 &dev_attr_linelength.attr, 337 &dev_attr_width.attr, 338 &dev_attr_height.attr, 339 &dev_attr_depth.attr, 340 NULL 341 }; 342 ATTRIBUTE_GROUPS(efifb); 343 344 static bool pci_dev_disabled; /* FB base matches BAR of a disabled device */ 345 346 static struct pci_dev *efifb_pci_dev; /* dev with BAR covering the efifb */ 347 static struct resource *bar_resource; 348 static u64 bar_offset; 349 350 static int efifb_probe(struct platform_device *dev) 351 { 352 struct fb_info *info; 353 int err, orientation; 354 unsigned int size_vmode; 355 unsigned int size_remap; 356 unsigned int size_total; 357 char *option = NULL; 358 efi_memory_desc_t md; 359 360 if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI || pci_dev_disabled) 361 return -ENODEV; 362 363 if (fb_get_options("efifb", &option)) 364 return -ENODEV; 365 efifb_setup(option); 366 367 /* We don't get linelength from UGA Draw Protocol, only from 368 * EFI Graphics Protocol. So if it's not in DMI, and it's not 369 * passed in from the user, we really can't use the framebuffer. 370 */ 371 if (!screen_info.lfb_linelength) 372 return -ENODEV; 373 374 if (!screen_info.lfb_depth) 375 screen_info.lfb_depth = 32; 376 if (!screen_info.pages) 377 screen_info.pages = 1; 378 if (!fb_base_is_valid()) { 379 printk(KERN_DEBUG "efifb: invalid framebuffer address\n"); 380 return -ENODEV; 381 } 382 printk(KERN_INFO "efifb: probing for efifb\n"); 383 384 /* just assume they're all unset if any are */ 385 if (!screen_info.blue_size) { 386 screen_info.blue_size = 8; 387 screen_info.blue_pos = 0; 388 screen_info.green_size = 8; 389 screen_info.green_pos = 8; 390 screen_info.red_size = 8; 391 screen_info.red_pos = 16; 392 screen_info.rsvd_size = 8; 393 screen_info.rsvd_pos = 24; 394 } 395 396 efifb_fix.smem_start = screen_info.lfb_base; 397 398 if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) { 399 u64 ext_lfb_base; 400 401 ext_lfb_base = (u64)(unsigned long)screen_info.ext_lfb_base << 32; 402 efifb_fix.smem_start |= ext_lfb_base; 403 } 404 405 if (bar_resource && 406 bar_resource->start + bar_offset != efifb_fix.smem_start) { 407 dev_info(&efifb_pci_dev->dev, 408 "BAR has moved, updating efifb address\n"); 409 efifb_fix.smem_start = bar_resource->start + bar_offset; 410 } 411 412 efifb_defined.bits_per_pixel = screen_info.lfb_depth; 413 efifb_defined.xres = screen_info.lfb_width; 414 efifb_defined.yres = screen_info.lfb_height; 415 efifb_fix.line_length = screen_info.lfb_linelength; 416 417 /* size_vmode -- that is the amount of memory needed for the 418 * used video mode, i.e. the minimum amount of 419 * memory we need. */ 420 size_vmode = efifb_defined.yres * efifb_fix.line_length; 421 422 /* size_total -- all video memory we have. Used for 423 * entries, ressource allocation and bounds 424 * checking. */ 425 size_total = screen_info.lfb_size; 426 if (size_total < size_vmode) 427 size_total = size_vmode; 428 429 /* size_remap -- the amount of video memory we are going to 430 * use for efifb. With modern cards it is no 431 * option to simply use size_total as that 432 * wastes plenty of kernel address space. */ 433 size_remap = size_vmode * 2; 434 if (size_remap > size_total) 435 size_remap = size_total; 436 if (size_remap % PAGE_SIZE) 437 size_remap += PAGE_SIZE - (size_remap % PAGE_SIZE); 438 efifb_fix.smem_len = size_remap; 439 440 if (request_mem_region(efifb_fix.smem_start, size_remap, "efifb")) { 441 request_mem_succeeded = true; 442 } else { 443 /* We cannot make this fatal. Sometimes this comes from magic 444 spaces our resource handlers simply don't know about */ 445 pr_warn("efifb: cannot reserve video memory at 0x%lx\n", 446 efifb_fix.smem_start); 447 } 448 449 info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev); 450 if (!info) { 451 pr_err("efifb: cannot allocate framebuffer\n"); 452 err = -ENOMEM; 453 goto err_release_mem; 454 } 455 platform_set_drvdata(dev, info); 456 info->pseudo_palette = info->par; 457 info->par = NULL; 458 459 info->apertures = alloc_apertures(1); 460 if (!info->apertures) { 461 err = -ENOMEM; 462 goto err_release_fb; 463 } 464 info->apertures->ranges[0].base = efifb_fix.smem_start; 465 info->apertures->ranges[0].size = size_remap; 466 467 if (efi_enabled(EFI_BOOT) && 468 !efi_mem_desc_lookup(efifb_fix.smem_start, &md)) { 469 if ((efifb_fix.smem_start + efifb_fix.smem_len) > 470 (md.phys_addr + (md.num_pages << EFI_PAGE_SHIFT))) { 471 pr_err("efifb: video memory @ 0x%lx spans multiple EFI memory regions\n", 472 efifb_fix.smem_start); 473 err = -EIO; 474 goto err_release_fb; 475 } 476 /* 477 * If the UEFI memory map covers the efifb region, we may only 478 * remap it using the attributes the memory map prescribes. 479 */ 480 md.attribute &= EFI_MEMORY_UC | EFI_MEMORY_WC | 481 EFI_MEMORY_WT | EFI_MEMORY_WB; 482 if (md.attribute) { 483 mem_flags |= EFI_MEMORY_WT | EFI_MEMORY_WB; 484 mem_flags &= md.attribute; 485 } 486 } 487 if (mem_flags & EFI_MEMORY_WC) 488 info->screen_base = ioremap_wc(efifb_fix.smem_start, 489 efifb_fix.smem_len); 490 else if (mem_flags & EFI_MEMORY_UC) 491 info->screen_base = ioremap(efifb_fix.smem_start, 492 efifb_fix.smem_len); 493 else if (mem_flags & EFI_MEMORY_WT) 494 info->screen_base = memremap(efifb_fix.smem_start, 495 efifb_fix.smem_len, MEMREMAP_WT); 496 else if (mem_flags & EFI_MEMORY_WB) 497 info->screen_base = memremap(efifb_fix.smem_start, 498 efifb_fix.smem_len, MEMREMAP_WB); 499 if (!info->screen_base) { 500 pr_err("efifb: abort, cannot remap video memory 0x%x @ 0x%lx\n", 501 efifb_fix.smem_len, efifb_fix.smem_start); 502 err = -EIO; 503 goto err_release_fb; 504 } 505 506 efifb_show_boot_graphics(info); 507 508 pr_info("efifb: framebuffer at 0x%lx, using %dk, total %dk\n", 509 efifb_fix.smem_start, size_remap/1024, size_total/1024); 510 pr_info("efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n", 511 efifb_defined.xres, efifb_defined.yres, 512 efifb_defined.bits_per_pixel, efifb_fix.line_length, 513 screen_info.pages); 514 515 efifb_defined.xres_virtual = efifb_defined.xres; 516 efifb_defined.yres_virtual = efifb_fix.smem_len / 517 efifb_fix.line_length; 518 pr_info("efifb: scrolling: redraw\n"); 519 efifb_defined.yres_virtual = efifb_defined.yres; 520 521 /* some dummy values for timing to make fbset happy */ 522 efifb_defined.pixclock = 10000000 / efifb_defined.xres * 523 1000 / efifb_defined.yres; 524 efifb_defined.left_margin = (efifb_defined.xres / 8) & 0xf8; 525 efifb_defined.hsync_len = (efifb_defined.xres / 8) & 0xf8; 526 527 efifb_defined.red.offset = screen_info.red_pos; 528 efifb_defined.red.length = screen_info.red_size; 529 efifb_defined.green.offset = screen_info.green_pos; 530 efifb_defined.green.length = screen_info.green_size; 531 efifb_defined.blue.offset = screen_info.blue_pos; 532 efifb_defined.blue.length = screen_info.blue_size; 533 efifb_defined.transp.offset = screen_info.rsvd_pos; 534 efifb_defined.transp.length = screen_info.rsvd_size; 535 536 pr_info("efifb: %s: " 537 "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n", 538 "Truecolor", 539 screen_info.rsvd_size, 540 screen_info.red_size, 541 screen_info.green_size, 542 screen_info.blue_size, 543 screen_info.rsvd_pos, 544 screen_info.red_pos, 545 screen_info.green_pos, 546 screen_info.blue_pos); 547 548 efifb_fix.ypanstep = 0; 549 efifb_fix.ywrapstep = 0; 550 551 info->fbops = &efifb_ops; 552 info->var = efifb_defined; 553 info->fix = efifb_fix; 554 info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE; 555 556 orientation = drm_get_panel_orientation_quirk(efifb_defined.xres, 557 efifb_defined.yres); 558 switch (orientation) { 559 default: 560 info->fbcon_rotate_hint = FB_ROTATE_UR; 561 break; 562 case DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP: 563 info->fbcon_rotate_hint = FB_ROTATE_UD; 564 break; 565 case DRM_MODE_PANEL_ORIENTATION_LEFT_UP: 566 info->fbcon_rotate_hint = FB_ROTATE_CCW; 567 break; 568 case DRM_MODE_PANEL_ORIENTATION_RIGHT_UP: 569 info->fbcon_rotate_hint = FB_ROTATE_CW; 570 break; 571 } 572 573 err = sysfs_create_groups(&dev->dev.kobj, efifb_groups); 574 if (err) { 575 pr_err("efifb: cannot add sysfs attrs\n"); 576 goto err_unmap; 577 } 578 err = fb_alloc_cmap(&info->cmap, 256, 0); 579 if (err < 0) { 580 pr_err("efifb: cannot allocate colormap\n"); 581 goto err_groups; 582 } 583 err = register_framebuffer(info); 584 if (err < 0) { 585 pr_err("efifb: cannot register framebuffer\n"); 586 goto err_fb_dealoc; 587 } 588 fb_info(info, "%s frame buffer device\n", info->fix.id); 589 return 0; 590 591 err_fb_dealoc: 592 fb_dealloc_cmap(&info->cmap); 593 err_groups: 594 sysfs_remove_groups(&dev->dev.kobj, efifb_groups); 595 err_unmap: 596 if (mem_flags & (EFI_MEMORY_UC | EFI_MEMORY_WC)) 597 iounmap(info->screen_base); 598 else 599 memunmap(info->screen_base); 600 err_release_fb: 601 framebuffer_release(info); 602 err_release_mem: 603 if (request_mem_succeeded) 604 release_mem_region(efifb_fix.smem_start, size_total); 605 return err; 606 } 607 608 static int efifb_remove(struct platform_device *pdev) 609 { 610 struct fb_info *info = platform_get_drvdata(pdev); 611 612 unregister_framebuffer(info); 613 sysfs_remove_groups(&pdev->dev.kobj, efifb_groups); 614 framebuffer_release(info); 615 616 return 0; 617 } 618 619 static struct platform_driver efifb_driver = { 620 .driver = { 621 .name = "efi-framebuffer", 622 }, 623 .probe = efifb_probe, 624 .remove = efifb_remove, 625 }; 626 627 builtin_platform_driver(efifb_driver); 628 629 #if defined(CONFIG_PCI) 630 631 static void record_efifb_bar_resource(struct pci_dev *dev, int idx, u64 offset) 632 { 633 u16 word; 634 635 efifb_pci_dev = dev; 636 637 pci_read_config_word(dev, PCI_COMMAND, &word); 638 if (!(word & PCI_COMMAND_MEMORY)) { 639 pci_dev_disabled = true; 640 dev_err(&dev->dev, 641 "BAR %d: assigned to efifb but device is disabled!\n", 642 idx); 643 return; 644 } 645 646 bar_resource = &dev->resource[idx]; 647 bar_offset = offset; 648 649 dev_info(&dev->dev, "BAR %d: assigned to efifb\n", idx); 650 } 651 652 static void efifb_fixup_resources(struct pci_dev *dev) 653 { 654 u64 base = screen_info.lfb_base; 655 u64 size = screen_info.lfb_size; 656 int i; 657 658 if (efifb_pci_dev || screen_info.orig_video_isVGA != VIDEO_TYPE_EFI) 659 return; 660 661 if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) 662 base |= (u64)screen_info.ext_lfb_base << 32; 663 664 if (!base) 665 return; 666 667 for (i = 0; i <= PCI_STD_RESOURCE_END; i++) { 668 struct resource *res = &dev->resource[i]; 669 670 if (!(res->flags & IORESOURCE_MEM)) 671 continue; 672 673 if (res->start <= base && res->end >= base + size - 1) { 674 record_efifb_bar_resource(dev, i, base - res->start); 675 break; 676 } 677 } 678 } 679 DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY, 680 16, efifb_fixup_resources); 681 682 #endif 683