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/aperture.h> 11 #include <linux/kernel.h> 12 #include <linux/efi.h> 13 #include <linux/efi-bgrt.h> 14 #include <linux/errno.h> 15 #include <linux/fb.h> 16 #include <linux/pci.h> 17 #include <linux/platform_device.h> 18 #include <linux/printk.h> 19 #include <linux/screen_info.h> 20 #include <linux/pm_runtime.h> 21 #include <video/vga.h> 22 #include <asm/efi.h> 23 #include <drm/drm_utils.h> /* For drm_get_panel_orientation_quirk */ 24 #include <drm/drm_connector.h> /* For DRM_MODE_PANEL_ORIENTATION_* */ 25 26 struct bmp_file_header { 27 u16 id; 28 u32 file_size; 29 u32 reserved; 30 u32 bitmap_offset; 31 } __packed; 32 33 struct bmp_dib_header { 34 u32 dib_header_size; 35 s32 width; 36 s32 height; 37 u16 planes; 38 u16 bpp; 39 u32 compression; 40 u32 bitmap_size; 41 u32 horz_resolution; 42 u32 vert_resolution; 43 u32 colors_used; 44 u32 colors_important; 45 } __packed; 46 47 static bool use_bgrt = true; 48 static bool request_mem_succeeded = false; 49 static u64 mem_flags = EFI_MEMORY_WC | EFI_MEMORY_UC; 50 51 static struct pci_dev *efifb_pci_dev; /* dev with BAR covering the efifb */ 52 53 struct efifb_par { 54 u32 pseudo_palette[16]; 55 resource_size_t base; 56 resource_size_t size; 57 }; 58 59 static struct fb_var_screeninfo efifb_defined = { 60 .activate = FB_ACTIVATE_NOW, 61 .height = -1, 62 .width = -1, 63 .right_margin = 32, 64 .upper_margin = 16, 65 .lower_margin = 4, 66 .vsync_len = 4, 67 .vmode = FB_VMODE_NONINTERLACED, 68 }; 69 70 static struct fb_fix_screeninfo efifb_fix = { 71 .id = "EFI VGA", 72 .type = FB_TYPE_PACKED_PIXELS, 73 .accel = FB_ACCEL_NONE, 74 .visual = FB_VISUAL_TRUECOLOR, 75 }; 76 77 static int efifb_setcolreg(unsigned regno, unsigned red, unsigned green, 78 unsigned blue, unsigned transp, 79 struct fb_info *info) 80 { 81 /* 82 * Set a single color register. The values supplied are 83 * already rounded down to the hardware's capabilities 84 * (according to the entries in the `var' structure). Return 85 * != 0 for invalid regno. 86 */ 87 88 if (regno >= info->cmap.len) 89 return 1; 90 91 if (regno < 16) { 92 red >>= 16 - info->var.red.length; 93 green >>= 16 - info->var.green.length; 94 blue >>= 16 - info->var.blue.length; 95 ((u32 *)(info->pseudo_palette))[regno] = 96 (red << info->var.red.offset) | 97 (green << info->var.green.offset) | 98 (blue << info->var.blue.offset); 99 } 100 return 0; 101 } 102 103 /* 104 * If fbcon deffered console takeover is configured, the intent is for the 105 * framebuffer to show the boot graphics (e.g. vendor logo) until there is some 106 * (error) message to display. But the boot graphics may have been destroyed by 107 * e.g. option ROM output, detect this and restore the boot graphics. 108 */ 109 #if defined CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER && \ 110 defined CONFIG_ACPI_BGRT 111 static void efifb_copy_bmp(u8 *src, u32 *dst, int width, struct screen_info *si) 112 { 113 u8 r, g, b; 114 115 while (width--) { 116 b = *src++; 117 g = *src++; 118 r = *src++; 119 *dst++ = (r << si->red_pos) | 120 (g << si->green_pos) | 121 (b << si->blue_pos); 122 } 123 } 124 125 #ifdef CONFIG_X86 126 /* 127 * On x86 some firmwares use a low non native resolution for the display when 128 * they have shown some text messages. While keeping the bgrt filled with info 129 * for the native resolution. If the bgrt image intended for the native 130 * resolution still fits, it will be displayed very close to the right edge of 131 * the display looking quite bad. This function checks for this. 132 */ 133 static bool efifb_bgrt_sanity_check(struct screen_info *si, u32 bmp_width) 134 { 135 /* 136 * All x86 firmwares horizontally center the image (the yoffset 137 * calculations differ between boards, but xoffset is predictable). 138 */ 139 u32 expected_xoffset = (si->lfb_width - bmp_width) / 2; 140 141 return bgrt_tab.image_offset_x == expected_xoffset; 142 } 143 #else 144 static bool efifb_bgrt_sanity_check(struct screen_info *si, u32 bmp_width) 145 { 146 return true; 147 } 148 #endif 149 150 static void efifb_show_boot_graphics(struct fb_info *info) 151 { 152 u32 bmp_width, bmp_height, bmp_pitch, dst_x, y, src_y; 153 struct screen_info *si = &screen_info; 154 struct bmp_file_header *file_header; 155 struct bmp_dib_header *dib_header; 156 void *bgrt_image = NULL; 157 u8 *dst = info->screen_base; 158 159 if (!use_bgrt) 160 return; 161 162 if (!bgrt_tab.image_address) { 163 pr_info("efifb: No BGRT, not showing boot graphics\n"); 164 return; 165 } 166 167 if (bgrt_tab.status & 0x06) { 168 pr_info("efifb: BGRT rotation bits set, 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); 206 207 if ((file_header->bitmap_offset + bmp_pitch * bmp_height) > 208 bgrt_image_size) 209 goto error; 210 211 if ((bgrt_tab.image_offset_x + bmp_width) > si->lfb_width || 212 (bgrt_tab.image_offset_y + bmp_height) > si->lfb_height) 213 goto error; 214 215 if (!efifb_bgrt_sanity_check(si, bmp_width)) 216 goto error; 217 218 pr_info("efifb: showing boot graphics\n"); 219 220 for (y = 0; y < si->lfb_height; y++, dst += si->lfb_linelength) { 221 /* Only background? */ 222 if (y < bgrt_tab.image_offset_y || 223 y >= (bgrt_tab.image_offset_y + bmp_height)) { 224 memset(dst, 0, 4 * si->lfb_width); 225 continue; 226 } 227 228 src_y = y - bgrt_tab.image_offset_y; 229 /* Positive header height means upside down row order */ 230 if (dib_header->height > 0) 231 src_y = (bmp_height - 1) - src_y; 232 233 memset(dst, 0, bgrt_tab.image_offset_x * 4); 234 dst_x = bgrt_tab.image_offset_x; 235 efifb_copy_bmp(bgrt_image + file_header->bitmap_offset + 236 src_y * bmp_pitch, 237 (u32 *)dst + dst_x, bmp_width, si); 238 dst_x += bmp_width; 239 memset((u32 *)dst + dst_x, 0, (si->lfb_width - dst_x) * 4); 240 } 241 242 memunmap(bgrt_image); 243 return; 244 245 error: 246 memunmap(bgrt_image); 247 pr_warn("efifb: Ignoring BGRT: unexpected or invalid BMP data\n"); 248 } 249 #else 250 static inline void efifb_show_boot_graphics(struct fb_info *info) {} 251 #endif 252 253 /* 254 * fb_ops.fb_destroy is called by the last put_fb_info() call at the end 255 * of unregister_framebuffer() or fb_release(). Do any cleanup here. 256 */ 257 static void efifb_destroy(struct fb_info *info) 258 { 259 struct efifb_par *par = info->par; 260 261 if (efifb_pci_dev) 262 pm_runtime_put(&efifb_pci_dev->dev); 263 264 if (info->screen_base) { 265 if (mem_flags & (EFI_MEMORY_UC | EFI_MEMORY_WC)) 266 iounmap(info->screen_base); 267 else 268 memunmap(info->screen_base); 269 } 270 271 if (request_mem_succeeded) 272 release_mem_region(par->base, par->size); 273 fb_dealloc_cmap(&info->cmap); 274 275 framebuffer_release(info); 276 } 277 278 static const struct fb_ops efifb_ops = { 279 .owner = THIS_MODULE, 280 .fb_destroy = efifb_destroy, 281 .fb_setcolreg = efifb_setcolreg, 282 .fb_fillrect = cfb_fillrect, 283 .fb_copyarea = cfb_copyarea, 284 .fb_imageblit = cfb_imageblit, 285 }; 286 287 static int efifb_setup(char *options) 288 { 289 char *this_opt; 290 291 if (options && *options) { 292 while ((this_opt = strsep(&options, ",")) != NULL) { 293 if (!*this_opt) continue; 294 295 efifb_setup_from_dmi(&screen_info, this_opt); 296 297 if (!strncmp(this_opt, "base:", 5)) 298 screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0); 299 else if (!strncmp(this_opt, "stride:", 7)) 300 screen_info.lfb_linelength = simple_strtoul(this_opt+7, NULL, 0) * 4; 301 else if (!strncmp(this_opt, "height:", 7)) 302 screen_info.lfb_height = simple_strtoul(this_opt+7, NULL, 0); 303 else if (!strncmp(this_opt, "width:", 6)) 304 screen_info.lfb_width = simple_strtoul(this_opt+6, NULL, 0); 305 else if (!strcmp(this_opt, "nowc")) 306 mem_flags &= ~EFI_MEMORY_WC; 307 else if (!strcmp(this_opt, "nobgrt")) 308 use_bgrt = false; 309 } 310 } 311 312 return 0; 313 } 314 315 static inline bool fb_base_is_valid(void) 316 { 317 if (screen_info.lfb_base) 318 return true; 319 320 if (!(screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)) 321 return false; 322 323 if (screen_info.ext_lfb_base) 324 return true; 325 326 return false; 327 } 328 329 #define efifb_attr_decl(name, fmt) \ 330 static ssize_t name##_show(struct device *dev, \ 331 struct device_attribute *attr, \ 332 char *buf) \ 333 { \ 334 return sprintf(buf, fmt "\n", (screen_info.lfb_##name)); \ 335 } \ 336 static DEVICE_ATTR_RO(name) 337 338 efifb_attr_decl(base, "0x%x"); 339 efifb_attr_decl(linelength, "%u"); 340 efifb_attr_decl(height, "%u"); 341 efifb_attr_decl(width, "%u"); 342 efifb_attr_decl(depth, "%u"); 343 344 static struct attribute *efifb_attrs[] = { 345 &dev_attr_base.attr, 346 &dev_attr_linelength.attr, 347 &dev_attr_width.attr, 348 &dev_attr_height.attr, 349 &dev_attr_depth.attr, 350 NULL 351 }; 352 ATTRIBUTE_GROUPS(efifb); 353 354 static bool pci_dev_disabled; /* FB base matches BAR of a disabled device */ 355 356 static struct resource *bar_resource; 357 static u64 bar_offset; 358 359 static int efifb_probe(struct platform_device *dev) 360 { 361 struct fb_info *info; 362 struct efifb_par *par; 363 int err, orientation; 364 unsigned int size_vmode; 365 unsigned int size_remap; 366 unsigned int size_total; 367 char *option = NULL; 368 efi_memory_desc_t md; 369 370 if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI || pci_dev_disabled) 371 return -ENODEV; 372 373 if (fb_get_options("efifb", &option)) 374 return -ENODEV; 375 efifb_setup(option); 376 377 /* We don't get linelength from UGA Draw Protocol, only from 378 * EFI Graphics Protocol. So if it's not in DMI, and it's not 379 * passed in from the user, we really can't use the framebuffer. 380 */ 381 if (!screen_info.lfb_linelength) 382 return -ENODEV; 383 384 if (!screen_info.lfb_depth) 385 screen_info.lfb_depth = 32; 386 if (!screen_info.pages) 387 screen_info.pages = 1; 388 if (!fb_base_is_valid()) { 389 printk(KERN_DEBUG "efifb: invalid framebuffer address\n"); 390 return -ENODEV; 391 } 392 printk(KERN_INFO "efifb: probing for efifb\n"); 393 394 /* just assume they're all unset if any are */ 395 if (!screen_info.blue_size) { 396 screen_info.blue_size = 8; 397 screen_info.blue_pos = 0; 398 screen_info.green_size = 8; 399 screen_info.green_pos = 8; 400 screen_info.red_size = 8; 401 screen_info.red_pos = 16; 402 screen_info.rsvd_size = 8; 403 screen_info.rsvd_pos = 24; 404 } 405 406 efifb_fix.smem_start = screen_info.lfb_base; 407 408 if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) { 409 u64 ext_lfb_base; 410 411 ext_lfb_base = (u64)(unsigned long)screen_info.ext_lfb_base << 32; 412 efifb_fix.smem_start |= ext_lfb_base; 413 } 414 415 if (bar_resource && 416 bar_resource->start + bar_offset != efifb_fix.smem_start) { 417 dev_info(&efifb_pci_dev->dev, 418 "BAR has moved, updating efifb address\n"); 419 efifb_fix.smem_start = bar_resource->start + bar_offset; 420 } 421 422 efifb_defined.bits_per_pixel = screen_info.lfb_depth; 423 efifb_defined.xres = screen_info.lfb_width; 424 efifb_defined.yres = screen_info.lfb_height; 425 efifb_fix.line_length = screen_info.lfb_linelength; 426 427 /* size_vmode -- that is the amount of memory needed for the 428 * used video mode, i.e. the minimum amount of 429 * memory we need. */ 430 size_vmode = efifb_defined.yres * efifb_fix.line_length; 431 432 /* size_total -- all video memory we have. Used for 433 * entries, ressource allocation and bounds 434 * checking. */ 435 size_total = screen_info.lfb_size; 436 if (size_total < size_vmode) 437 size_total = size_vmode; 438 439 /* size_remap -- the amount of video memory we are going to 440 * use for efifb. With modern cards it is no 441 * option to simply use size_total as that 442 * wastes plenty of kernel address space. */ 443 size_remap = size_vmode * 2; 444 if (size_remap > size_total) 445 size_remap = size_total; 446 if (size_remap % PAGE_SIZE) 447 size_remap += PAGE_SIZE - (size_remap % PAGE_SIZE); 448 efifb_fix.smem_len = size_remap; 449 450 if (request_mem_region(efifb_fix.smem_start, size_remap, "efifb")) { 451 request_mem_succeeded = true; 452 } else { 453 /* We cannot make this fatal. Sometimes this comes from magic 454 spaces our resource handlers simply don't know about */ 455 pr_warn("efifb: cannot reserve video memory at 0x%lx\n", 456 efifb_fix.smem_start); 457 } 458 459 info = framebuffer_alloc(sizeof(*par), &dev->dev); 460 if (!info) { 461 err = -ENOMEM; 462 goto err_release_mem; 463 } 464 platform_set_drvdata(dev, info); 465 par = info->par; 466 info->pseudo_palette = par->pseudo_palette; 467 468 par->base = efifb_fix.smem_start; 469 par->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; 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 = devm_aperture_acquire_for_platform_device(dev, par->base, par->size); 592 if (err) { 593 pr_err("efifb: cannot acquire aperture\n"); 594 goto err_put_rpm_ref; 595 } 596 err = register_framebuffer(info); 597 if (err < 0) { 598 pr_err("efifb: cannot register framebuffer\n"); 599 goto err_put_rpm_ref; 600 } 601 fb_info(info, "%s frame buffer device\n", info->fix.id); 602 return 0; 603 604 err_put_rpm_ref: 605 if (efifb_pci_dev) 606 pm_runtime_put(&efifb_pci_dev->dev); 607 608 fb_dealloc_cmap(&info->cmap); 609 err_groups: 610 sysfs_remove_groups(&dev->dev.kobj, efifb_groups); 611 err_unmap: 612 if (mem_flags & (EFI_MEMORY_UC | EFI_MEMORY_WC)) 613 iounmap(info->screen_base); 614 else 615 memunmap(info->screen_base); 616 err_release_fb: 617 framebuffer_release(info); 618 err_release_mem: 619 if (request_mem_succeeded) 620 release_mem_region(efifb_fix.smem_start, size_total); 621 return err; 622 } 623 624 static void efifb_remove(struct platform_device *pdev) 625 { 626 struct fb_info *info = platform_get_drvdata(pdev); 627 628 /* efifb_destroy takes care of info cleanup */ 629 unregister_framebuffer(info); 630 sysfs_remove_groups(&pdev->dev.kobj, efifb_groups); 631 } 632 633 static struct platform_driver efifb_driver = { 634 .driver = { 635 .name = "efi-framebuffer", 636 }, 637 .probe = efifb_probe, 638 .remove_new = efifb_remove, 639 }; 640 641 builtin_platform_driver(efifb_driver); 642 643 #if defined(CONFIG_PCI) 644 645 static void record_efifb_bar_resource(struct pci_dev *dev, int idx, u64 offset) 646 { 647 u16 word; 648 649 efifb_pci_dev = dev; 650 651 pci_read_config_word(dev, PCI_COMMAND, &word); 652 if (!(word & PCI_COMMAND_MEMORY)) { 653 pci_dev_disabled = true; 654 dev_err(&dev->dev, 655 "BAR %d: assigned to efifb but device is disabled!\n", 656 idx); 657 return; 658 } 659 660 bar_resource = &dev->resource[idx]; 661 bar_offset = offset; 662 663 dev_info(&dev->dev, "BAR %d: assigned to efifb\n", idx); 664 } 665 666 static void efifb_fixup_resources(struct pci_dev *dev) 667 { 668 u64 base = screen_info.lfb_base; 669 u64 size = screen_info.lfb_size; 670 int i; 671 672 if (efifb_pci_dev || screen_info.orig_video_isVGA != VIDEO_TYPE_EFI) 673 return; 674 675 if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) 676 base |= (u64)screen_info.ext_lfb_base << 32; 677 678 if (!base) 679 return; 680 681 for (i = 0; i < PCI_STD_NUM_BARS; i++) { 682 struct resource *res = &dev->resource[i]; 683 684 if (!(res->flags & IORESOURCE_MEM)) 685 continue; 686 687 if (res->start <= base && res->end >= base + size - 1) { 688 record_efifb_bar_resource(dev, i, base - res->start); 689 break; 690 } 691 } 692 } 693 DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY, 694 16, efifb_fixup_resources); 695 696 #endif 697