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 <linux/pm_runtime.h> 20 #include <video/vga.h> 21 #include <asm/efi.h> 22 #include <drm/drm_utils.h> /* For drm_get_panel_orientation_quirk */ 23 #include <drm/drm_connector.h> /* For DRM_MODE_PANEL_ORIENTATION_* */ 24 25 struct bmp_file_header { 26 u16 id; 27 u32 file_size; 28 u32 reserved; 29 u32 bitmap_offset; 30 } __packed; 31 32 struct bmp_dib_header { 33 u32 dib_header_size; 34 s32 width; 35 s32 height; 36 u16 planes; 37 u16 bpp; 38 u32 compression; 39 u32 bitmap_size; 40 u32 horz_resolution; 41 u32 vert_resolution; 42 u32 colors_used; 43 u32 colors_important; 44 } __packed; 45 46 static bool use_bgrt = true; 47 static bool request_mem_succeeded = false; 48 static u64 mem_flags = EFI_MEMORY_WC | EFI_MEMORY_UC; 49 50 static struct pci_dev *efifb_pci_dev; /* dev with BAR covering the efifb */ 51 52 static struct fb_var_screeninfo efifb_defined = { 53 .activate = FB_ACTIVATE_NOW, 54 .height = -1, 55 .width = -1, 56 .right_margin = 32, 57 .upper_margin = 16, 58 .lower_margin = 4, 59 .vsync_len = 4, 60 .vmode = FB_VMODE_NONINTERLACED, 61 }; 62 63 static struct fb_fix_screeninfo efifb_fix = { 64 .id = "EFI VGA", 65 .type = FB_TYPE_PACKED_PIXELS, 66 .accel = FB_ACCEL_NONE, 67 .visual = FB_VISUAL_TRUECOLOR, 68 }; 69 70 static int efifb_setcolreg(unsigned regno, unsigned red, unsigned green, 71 unsigned blue, unsigned transp, 72 struct fb_info *info) 73 { 74 /* 75 * Set a single color register. The values supplied are 76 * already rounded down to the hardware's capabilities 77 * (according to the entries in the `var' structure). Return 78 * != 0 for invalid regno. 79 */ 80 81 if (regno >= info->cmap.len) 82 return 1; 83 84 if (regno < 16) { 85 red >>= 16 - info->var.red.length; 86 green >>= 16 - info->var.green.length; 87 blue >>= 16 - info->var.blue.length; 88 ((u32 *)(info->pseudo_palette))[regno] = 89 (red << info->var.red.offset) | 90 (green << info->var.green.offset) | 91 (blue << info->var.blue.offset); 92 } 93 return 0; 94 } 95 96 /* 97 * If fbcon deffered console takeover is configured, the intent is for the 98 * framebuffer to show the boot graphics (e.g. vendor logo) until there is some 99 * (error) message to display. But the boot graphics may have been destroyed by 100 * e.g. option ROM output, detect this and restore the boot graphics. 101 */ 102 #if defined CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER && \ 103 defined CONFIG_ACPI_BGRT 104 static void efifb_copy_bmp(u8 *src, u32 *dst, int width, struct screen_info *si) 105 { 106 u8 r, g, b; 107 108 while (width--) { 109 b = *src++; 110 g = *src++; 111 r = *src++; 112 *dst++ = (r << si->red_pos) | 113 (g << si->green_pos) | 114 (b << si->blue_pos); 115 } 116 } 117 118 #ifdef CONFIG_X86 119 /* 120 * On x86 some firmwares use a low non native resolution for the display when 121 * they have shown some text messages. While keeping the bgrt filled with info 122 * for the native resolution. If the bgrt image intended for the native 123 * resolution still fits, it will be displayed very close to the right edge of 124 * the display looking quite bad. This function checks for this. 125 */ 126 static bool efifb_bgrt_sanity_check(struct screen_info *si, u32 bmp_width) 127 { 128 /* 129 * All x86 firmwares horizontally center the image (the yoffset 130 * calculations differ between boards, but xoffset is predictable). 131 */ 132 u32 expected_xoffset = (si->lfb_width - bmp_width) / 2; 133 134 return bgrt_tab.image_offset_x == expected_xoffset; 135 } 136 #else 137 static bool efifb_bgrt_sanity_check(struct screen_info *si, u32 bmp_width) 138 { 139 return true; 140 } 141 #endif 142 143 static void efifb_show_boot_graphics(struct fb_info *info) 144 { 145 u32 bmp_width, bmp_height, bmp_pitch, dst_x, y, src_y; 146 struct screen_info *si = &screen_info; 147 struct bmp_file_header *file_header; 148 struct bmp_dib_header *dib_header; 149 void *bgrt_image = NULL; 150 u8 *dst = info->screen_base; 151 152 if (!use_bgrt) 153 return; 154 155 if (!bgrt_tab.image_address) { 156 pr_info("efifb: No BGRT, not showing boot graphics\n"); 157 return; 158 } 159 160 if (bgrt_tab.status & 0x06) { 161 pr_info("efifb: BGRT rotation bits set, not showing boot graphics\n"); 162 return; 163 } 164 165 /* Avoid flashing the logo if we're going to print std probe messages */ 166 if (console_loglevel > CONSOLE_LOGLEVEL_QUIET) 167 return; 168 169 /* bgrt_tab.status is unreliable, so we don't check it */ 170 171 if (si->lfb_depth != 32) { 172 pr_info("efifb: not 32 bits, not showing boot graphics\n"); 173 return; 174 } 175 176 bgrt_image = memremap(bgrt_tab.image_address, bgrt_image_size, 177 MEMREMAP_WB); 178 if (!bgrt_image) { 179 pr_warn("efifb: Ignoring BGRT: failed to map image memory\n"); 180 return; 181 } 182 183 if (bgrt_image_size < (sizeof(*file_header) + sizeof(*dib_header))) 184 goto error; 185 186 file_header = bgrt_image; 187 if (file_header->id != 0x4d42 || file_header->reserved != 0) 188 goto error; 189 190 dib_header = bgrt_image + sizeof(*file_header); 191 if (dib_header->dib_header_size != 40 || dib_header->width < 0 || 192 dib_header->planes != 1 || dib_header->bpp != 24 || 193 dib_header->compression != 0) 194 goto error; 195 196 bmp_width = dib_header->width; 197 bmp_height = abs(dib_header->height); 198 bmp_pitch = round_up(3 * bmp_width, 4); 199 200 if ((file_header->bitmap_offset + bmp_pitch * bmp_height) > 201 bgrt_image_size) 202 goto error; 203 204 if ((bgrt_tab.image_offset_x + bmp_width) > si->lfb_width || 205 (bgrt_tab.image_offset_y + bmp_height) > si->lfb_height) 206 goto error; 207 208 if (!efifb_bgrt_sanity_check(si, bmp_width)) 209 goto error; 210 211 pr_info("efifb: showing boot graphics\n"); 212 213 for (y = 0; y < si->lfb_height; y++, dst += si->lfb_linelength) { 214 /* Only background? */ 215 if (y < bgrt_tab.image_offset_y || 216 y >= (bgrt_tab.image_offset_y + bmp_height)) { 217 memset(dst, 0, 4 * si->lfb_width); 218 continue; 219 } 220 221 src_y = y - bgrt_tab.image_offset_y; 222 /* Positive header height means upside down row order */ 223 if (dib_header->height > 0) 224 src_y = (bmp_height - 1) - src_y; 225 226 memset(dst, 0, bgrt_tab.image_offset_x * 4); 227 dst_x = bgrt_tab.image_offset_x; 228 efifb_copy_bmp(bgrt_image + file_header->bitmap_offset + 229 src_y * bmp_pitch, 230 (u32 *)dst + dst_x, bmp_width, si); 231 dst_x += bmp_width; 232 memset((u32 *)dst + dst_x, 0, (si->lfb_width - dst_x) * 4); 233 } 234 235 memunmap(bgrt_image); 236 return; 237 238 error: 239 memunmap(bgrt_image); 240 pr_warn("efifb: Ignoring BGRT: unexpected or invalid BMP data\n"); 241 } 242 #else 243 static inline void efifb_show_boot_graphics(struct fb_info *info) {} 244 #endif 245 246 /* 247 * fb_ops.fb_destroy is called by the last put_fb_info() call at the end 248 * of unregister_framebuffer() or fb_release(). Do any cleanup here. 249 */ 250 static void efifb_destroy(struct fb_info *info) 251 { 252 if (efifb_pci_dev) 253 pm_runtime_put(&efifb_pci_dev->dev); 254 255 if (info->screen_base) { 256 if (mem_flags & (EFI_MEMORY_UC | EFI_MEMORY_WC)) 257 iounmap(info->screen_base); 258 else 259 memunmap(info->screen_base); 260 } 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 framebuffer_release(info); 268 } 269 270 static const struct fb_ops efifb_ops = { 271 .owner = THIS_MODULE, 272 .fb_destroy = efifb_destroy, 273 .fb_setcolreg = efifb_setcolreg, 274 .fb_fillrect = cfb_fillrect, 275 .fb_copyarea = cfb_copyarea, 276 .fb_imageblit = cfb_imageblit, 277 }; 278 279 static int efifb_setup(char *options) 280 { 281 char *this_opt; 282 283 if (options && *options) { 284 while ((this_opt = strsep(&options, ",")) != NULL) { 285 if (!*this_opt) continue; 286 287 efifb_setup_from_dmi(&screen_info, this_opt); 288 289 if (!strncmp(this_opt, "base:", 5)) 290 screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0); 291 else if (!strncmp(this_opt, "stride:", 7)) 292 screen_info.lfb_linelength = simple_strtoul(this_opt+7, NULL, 0) * 4; 293 else if (!strncmp(this_opt, "height:", 7)) 294 screen_info.lfb_height = simple_strtoul(this_opt+7, NULL, 0); 295 else if (!strncmp(this_opt, "width:", 6)) 296 screen_info.lfb_width = simple_strtoul(this_opt+6, NULL, 0); 297 else if (!strcmp(this_opt, "nowc")) 298 mem_flags &= ~EFI_MEMORY_WC; 299 else if (!strcmp(this_opt, "nobgrt")) 300 use_bgrt = false; 301 } 302 } 303 304 return 0; 305 } 306 307 static inline bool fb_base_is_valid(void) 308 { 309 if (screen_info.lfb_base) 310 return true; 311 312 if (!(screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)) 313 return false; 314 315 if (screen_info.ext_lfb_base) 316 return true; 317 318 return false; 319 } 320 321 #define efifb_attr_decl(name, fmt) \ 322 static ssize_t name##_show(struct device *dev, \ 323 struct device_attribute *attr, \ 324 char *buf) \ 325 { \ 326 return sprintf(buf, fmt "\n", (screen_info.lfb_##name)); \ 327 } \ 328 static DEVICE_ATTR_RO(name) 329 330 efifb_attr_decl(base, "0x%x"); 331 efifb_attr_decl(linelength, "%u"); 332 efifb_attr_decl(height, "%u"); 333 efifb_attr_decl(width, "%u"); 334 efifb_attr_decl(depth, "%u"); 335 336 static struct attribute *efifb_attrs[] = { 337 &dev_attr_base.attr, 338 &dev_attr_linelength.attr, 339 &dev_attr_width.attr, 340 &dev_attr_height.attr, 341 &dev_attr_depth.attr, 342 NULL 343 }; 344 ATTRIBUTE_GROUPS(efifb); 345 346 static bool pci_dev_disabled; /* FB base matches BAR of a disabled device */ 347 348 static struct resource *bar_resource; 349 static u64 bar_offset; 350 351 static int efifb_probe(struct platform_device *dev) 352 { 353 struct fb_info *info; 354 int err, orientation; 355 unsigned int size_vmode; 356 unsigned int size_remap; 357 unsigned int size_total; 358 char *option = NULL; 359 efi_memory_desc_t md; 360 361 if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI || pci_dev_disabled) 362 return -ENODEV; 363 364 if (fb_get_options("efifb", &option)) 365 return -ENODEV; 366 efifb_setup(option); 367 368 /* We don't get linelength from UGA Draw Protocol, only from 369 * EFI Graphics Protocol. So if it's not in DMI, and it's not 370 * passed in from the user, we really can't use the framebuffer. 371 */ 372 if (!screen_info.lfb_linelength) 373 return -ENODEV; 374 375 if (!screen_info.lfb_depth) 376 screen_info.lfb_depth = 32; 377 if (!screen_info.pages) 378 screen_info.pages = 1; 379 if (!fb_base_is_valid()) { 380 printk(KERN_DEBUG "efifb: invalid framebuffer address\n"); 381 return -ENODEV; 382 } 383 printk(KERN_INFO "efifb: probing for efifb\n"); 384 385 /* just assume they're all unset if any are */ 386 if (!screen_info.blue_size) { 387 screen_info.blue_size = 8; 388 screen_info.blue_pos = 0; 389 screen_info.green_size = 8; 390 screen_info.green_pos = 8; 391 screen_info.red_size = 8; 392 screen_info.red_pos = 16; 393 screen_info.rsvd_size = 8; 394 screen_info.rsvd_pos = 24; 395 } 396 397 efifb_fix.smem_start = screen_info.lfb_base; 398 399 if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) { 400 u64 ext_lfb_base; 401 402 ext_lfb_base = (u64)(unsigned long)screen_info.ext_lfb_base << 32; 403 efifb_fix.smem_start |= ext_lfb_base; 404 } 405 406 if (bar_resource && 407 bar_resource->start + bar_offset != efifb_fix.smem_start) { 408 dev_info(&efifb_pci_dev->dev, 409 "BAR has moved, updating efifb address\n"); 410 efifb_fix.smem_start = bar_resource->start + bar_offset; 411 } 412 413 efifb_defined.bits_per_pixel = screen_info.lfb_depth; 414 efifb_defined.xres = screen_info.lfb_width; 415 efifb_defined.yres = screen_info.lfb_height; 416 efifb_fix.line_length = screen_info.lfb_linelength; 417 418 /* size_vmode -- that is the amount of memory needed for the 419 * used video mode, i.e. the minimum amount of 420 * memory we need. */ 421 size_vmode = efifb_defined.yres * efifb_fix.line_length; 422 423 /* size_total -- all video memory we have. Used for 424 * entries, ressource allocation and bounds 425 * checking. */ 426 size_total = screen_info.lfb_size; 427 if (size_total < size_vmode) 428 size_total = size_vmode; 429 430 /* size_remap -- the amount of video memory we are going to 431 * use for efifb. With modern cards it is no 432 * option to simply use size_total as that 433 * wastes plenty of kernel address space. */ 434 size_remap = size_vmode * 2; 435 if (size_remap > size_total) 436 size_remap = size_total; 437 if (size_remap % PAGE_SIZE) 438 size_remap += PAGE_SIZE - (size_remap % PAGE_SIZE); 439 efifb_fix.smem_len = size_remap; 440 441 if (request_mem_region(efifb_fix.smem_start, size_remap, "efifb")) { 442 request_mem_succeeded = true; 443 } else { 444 /* We cannot make this fatal. Sometimes this comes from magic 445 spaces our resource handlers simply don't know about */ 446 pr_warn("efifb: cannot reserve video memory at 0x%lx\n", 447 efifb_fix.smem_start); 448 } 449 450 info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev); 451 if (!info) { 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_MEMMAP) && 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 } 583 584 if (efifb_pci_dev) 585 WARN_ON(pm_runtime_get_sync(&efifb_pci_dev->dev) < 0); 586 587 err = register_framebuffer(info); 588 if (err < 0) { 589 pr_err("efifb: cannot register framebuffer\n"); 590 goto err_put_rpm_ref; 591 } 592 fb_info(info, "%s frame buffer device\n", info->fix.id); 593 return 0; 594 595 err_put_rpm_ref: 596 if (efifb_pci_dev) 597 pm_runtime_put(&efifb_pci_dev->dev); 598 599 fb_dealloc_cmap(&info->cmap); 600 err_groups: 601 sysfs_remove_groups(&dev->dev.kobj, efifb_groups); 602 err_unmap: 603 if (mem_flags & (EFI_MEMORY_UC | EFI_MEMORY_WC)) 604 iounmap(info->screen_base); 605 else 606 memunmap(info->screen_base); 607 err_release_fb: 608 framebuffer_release(info); 609 err_release_mem: 610 if (request_mem_succeeded) 611 release_mem_region(efifb_fix.smem_start, size_total); 612 return err; 613 } 614 615 static int efifb_remove(struct platform_device *pdev) 616 { 617 struct fb_info *info = platform_get_drvdata(pdev); 618 619 /* efifb_destroy takes care of info cleanup */ 620 unregister_framebuffer(info); 621 sysfs_remove_groups(&pdev->dev.kobj, efifb_groups); 622 623 return 0; 624 } 625 626 static struct platform_driver efifb_driver = { 627 .driver = { 628 .name = "efi-framebuffer", 629 }, 630 .probe = efifb_probe, 631 .remove = efifb_remove, 632 }; 633 634 builtin_platform_driver(efifb_driver); 635 636 #if defined(CONFIG_PCI) 637 638 static void record_efifb_bar_resource(struct pci_dev *dev, int idx, u64 offset) 639 { 640 u16 word; 641 642 efifb_pci_dev = dev; 643 644 pci_read_config_word(dev, PCI_COMMAND, &word); 645 if (!(word & PCI_COMMAND_MEMORY)) { 646 pci_dev_disabled = true; 647 dev_err(&dev->dev, 648 "BAR %d: assigned to efifb but device is disabled!\n", 649 idx); 650 return; 651 } 652 653 bar_resource = &dev->resource[idx]; 654 bar_offset = offset; 655 656 dev_info(&dev->dev, "BAR %d: assigned to efifb\n", idx); 657 } 658 659 static void efifb_fixup_resources(struct pci_dev *dev) 660 { 661 u64 base = screen_info.lfb_base; 662 u64 size = screen_info.lfb_size; 663 int i; 664 665 if (efifb_pci_dev || screen_info.orig_video_isVGA != VIDEO_TYPE_EFI) 666 return; 667 668 if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) 669 base |= (u64)screen_info.ext_lfb_base << 32; 670 671 if (!base) 672 return; 673 674 for (i = 0; i < PCI_STD_NUM_BARS; i++) { 675 struct resource *res = &dev->resource[i]; 676 677 if (!(res->flags & IORESOURCE_MEM)) 678 continue; 679 680 if (res->start <= base && res->end >= base + size - 1) { 681 record_efifb_bar_resource(dev, i, base - res->start); 682 break; 683 } 684 } 685 } 686 DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY, 687 16, efifb_fixup_resources); 688 689 #endif 690