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 static void efifb_destroy(struct fb_info *info) 247 { 248 if (efifb_pci_dev) 249 pm_runtime_put(&efifb_pci_dev->dev); 250 251 if (info->screen_base) { 252 if (mem_flags & (EFI_MEMORY_UC | EFI_MEMORY_WC)) 253 iounmap(info->screen_base); 254 else 255 memunmap(info->screen_base); 256 } 257 if (request_mem_succeeded) 258 release_mem_region(info->apertures->ranges[0].base, 259 info->apertures->ranges[0].size); 260 fb_dealloc_cmap(&info->cmap); 261 } 262 263 static const struct fb_ops efifb_ops = { 264 .owner = THIS_MODULE, 265 .fb_destroy = efifb_destroy, 266 .fb_setcolreg = efifb_setcolreg, 267 .fb_fillrect = cfb_fillrect, 268 .fb_copyarea = cfb_copyarea, 269 .fb_imageblit = cfb_imageblit, 270 }; 271 272 static int efifb_setup(char *options) 273 { 274 char *this_opt; 275 276 if (options && *options) { 277 while ((this_opt = strsep(&options, ",")) != NULL) { 278 if (!*this_opt) continue; 279 280 efifb_setup_from_dmi(&screen_info, this_opt); 281 282 if (!strncmp(this_opt, "base:", 5)) 283 screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0); 284 else if (!strncmp(this_opt, "stride:", 7)) 285 screen_info.lfb_linelength = simple_strtoul(this_opt+7, NULL, 0) * 4; 286 else if (!strncmp(this_opt, "height:", 7)) 287 screen_info.lfb_height = simple_strtoul(this_opt+7, NULL, 0); 288 else if (!strncmp(this_opt, "width:", 6)) 289 screen_info.lfb_width = simple_strtoul(this_opt+6, NULL, 0); 290 else if (!strcmp(this_opt, "nowc")) 291 mem_flags &= ~EFI_MEMORY_WC; 292 else if (!strcmp(this_opt, "nobgrt")) 293 use_bgrt = false; 294 } 295 } 296 297 return 0; 298 } 299 300 static inline bool fb_base_is_valid(void) 301 { 302 if (screen_info.lfb_base) 303 return true; 304 305 if (!(screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)) 306 return false; 307 308 if (screen_info.ext_lfb_base) 309 return true; 310 311 return false; 312 } 313 314 #define efifb_attr_decl(name, fmt) \ 315 static ssize_t name##_show(struct device *dev, \ 316 struct device_attribute *attr, \ 317 char *buf) \ 318 { \ 319 return sprintf(buf, fmt "\n", (screen_info.lfb_##name)); \ 320 } \ 321 static DEVICE_ATTR_RO(name) 322 323 efifb_attr_decl(base, "0x%x"); 324 efifb_attr_decl(linelength, "%u"); 325 efifb_attr_decl(height, "%u"); 326 efifb_attr_decl(width, "%u"); 327 efifb_attr_decl(depth, "%u"); 328 329 static struct attribute *efifb_attrs[] = { 330 &dev_attr_base.attr, 331 &dev_attr_linelength.attr, 332 &dev_attr_width.attr, 333 &dev_attr_height.attr, 334 &dev_attr_depth.attr, 335 NULL 336 }; 337 ATTRIBUTE_GROUPS(efifb); 338 339 static bool pci_dev_disabled; /* FB base matches BAR of a disabled device */ 340 341 static struct resource *bar_resource; 342 static u64 bar_offset; 343 344 static int efifb_probe(struct platform_device *dev) 345 { 346 struct fb_info *info; 347 int err, orientation; 348 unsigned int size_vmode; 349 unsigned int size_remap; 350 unsigned int size_total; 351 char *option = NULL; 352 efi_memory_desc_t md; 353 354 /* 355 * Generic drivers must not be registered if a framebuffer exists. 356 * If a native driver was probed, the display hardware was already 357 * taken and attempting to use the system framebuffer is dangerous. 358 */ 359 if (num_registered_fb > 0) { 360 dev_err(&dev->dev, 361 "efifb: a framebuffer is already registered\n"); 362 return -EINVAL; 363 } 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_MEMMAP) && 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 } 587 588 if (efifb_pci_dev) 589 WARN_ON(pm_runtime_get_sync(&efifb_pci_dev->dev) < 0); 590 591 err = register_framebuffer(info); 592 if (err < 0) { 593 pr_err("efifb: cannot register framebuffer\n"); 594 goto err_put_rpm_ref; 595 } 596 fb_info(info, "%s frame buffer device\n", info->fix.id); 597 return 0; 598 599 err_put_rpm_ref: 600 if (efifb_pci_dev) 601 pm_runtime_put(&efifb_pci_dev->dev); 602 603 fb_dealloc_cmap(&info->cmap); 604 err_groups: 605 sysfs_remove_groups(&dev->dev.kobj, efifb_groups); 606 err_unmap: 607 if (mem_flags & (EFI_MEMORY_UC | EFI_MEMORY_WC)) 608 iounmap(info->screen_base); 609 else 610 memunmap(info->screen_base); 611 err_release_fb: 612 framebuffer_release(info); 613 err_release_mem: 614 if (request_mem_succeeded) 615 release_mem_region(efifb_fix.smem_start, size_total); 616 return err; 617 } 618 619 static int efifb_remove(struct platform_device *pdev) 620 { 621 struct fb_info *info = platform_get_drvdata(pdev); 622 623 unregister_framebuffer(info); 624 sysfs_remove_groups(&pdev->dev.kobj, efifb_groups); 625 framebuffer_release(info); 626 627 return 0; 628 } 629 630 static struct platform_driver efifb_driver = { 631 .driver = { 632 .name = "efi-framebuffer", 633 }, 634 .probe = efifb_probe, 635 .remove = efifb_remove, 636 }; 637 638 builtin_platform_driver(efifb_driver); 639 640 #if defined(CONFIG_PCI) 641 642 static void record_efifb_bar_resource(struct pci_dev *dev, int idx, u64 offset) 643 { 644 u16 word; 645 646 efifb_pci_dev = dev; 647 648 pci_read_config_word(dev, PCI_COMMAND, &word); 649 if (!(word & PCI_COMMAND_MEMORY)) { 650 pci_dev_disabled = true; 651 dev_err(&dev->dev, 652 "BAR %d: assigned to efifb but device is disabled!\n", 653 idx); 654 return; 655 } 656 657 bar_resource = &dev->resource[idx]; 658 bar_offset = offset; 659 660 dev_info(&dev->dev, "BAR %d: assigned to efifb\n", idx); 661 } 662 663 static void efifb_fixup_resources(struct pci_dev *dev) 664 { 665 u64 base = screen_info.lfb_base; 666 u64 size = screen_info.lfb_size; 667 int i; 668 669 if (efifb_pci_dev || screen_info.orig_video_isVGA != VIDEO_TYPE_EFI) 670 return; 671 672 if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) 673 base |= (u64)screen_info.ext_lfb_base << 32; 674 675 if (!base) 676 return; 677 678 for (i = 0; i < PCI_STD_NUM_BARS; i++) { 679 struct resource *res = &dev->resource[i]; 680 681 if (!(res->flags & IORESOURCE_MEM)) 682 continue; 683 684 if (res->start <= base && res->end >= base + size - 1) { 685 record_efifb_bar_resource(dev, i, base - res->start); 686 break; 687 } 688 } 689 } 690 DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY, 691 16, efifb_fixup_resources); 692 693 #endif 694