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 /* 362 * Generic drivers must not be registered if a framebuffer exists. 363 * If a native driver was probed, the display hardware was already 364 * taken and attempting to use the system framebuffer is dangerous. 365 */ 366 if (num_registered_fb > 0) { 367 dev_err(&dev->dev, 368 "efifb: a framebuffer is already registered\n"); 369 return -EINVAL; 370 } 371 372 if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI || pci_dev_disabled) 373 return -ENODEV; 374 375 if (fb_get_options("efifb", &option)) 376 return -ENODEV; 377 efifb_setup(option); 378 379 /* We don't get linelength from UGA Draw Protocol, only from 380 * EFI Graphics Protocol. So if it's not in DMI, and it's not 381 * passed in from the user, we really can't use the framebuffer. 382 */ 383 if (!screen_info.lfb_linelength) 384 return -ENODEV; 385 386 if (!screen_info.lfb_depth) 387 screen_info.lfb_depth = 32; 388 if (!screen_info.pages) 389 screen_info.pages = 1; 390 if (!fb_base_is_valid()) { 391 printk(KERN_DEBUG "efifb: invalid framebuffer address\n"); 392 return -ENODEV; 393 } 394 printk(KERN_INFO "efifb: probing for efifb\n"); 395 396 /* just assume they're all unset if any are */ 397 if (!screen_info.blue_size) { 398 screen_info.blue_size = 8; 399 screen_info.blue_pos = 0; 400 screen_info.green_size = 8; 401 screen_info.green_pos = 8; 402 screen_info.red_size = 8; 403 screen_info.red_pos = 16; 404 screen_info.rsvd_size = 8; 405 screen_info.rsvd_pos = 24; 406 } 407 408 efifb_fix.smem_start = screen_info.lfb_base; 409 410 if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) { 411 u64 ext_lfb_base; 412 413 ext_lfb_base = (u64)(unsigned long)screen_info.ext_lfb_base << 32; 414 efifb_fix.smem_start |= ext_lfb_base; 415 } 416 417 if (bar_resource && 418 bar_resource->start + bar_offset != efifb_fix.smem_start) { 419 dev_info(&efifb_pci_dev->dev, 420 "BAR has moved, updating efifb address\n"); 421 efifb_fix.smem_start = bar_resource->start + bar_offset; 422 } 423 424 efifb_defined.bits_per_pixel = screen_info.lfb_depth; 425 efifb_defined.xres = screen_info.lfb_width; 426 efifb_defined.yres = screen_info.lfb_height; 427 efifb_fix.line_length = screen_info.lfb_linelength; 428 429 /* size_vmode -- that is the amount of memory needed for the 430 * used video mode, i.e. the minimum amount of 431 * memory we need. */ 432 size_vmode = efifb_defined.yres * efifb_fix.line_length; 433 434 /* size_total -- all video memory we have. Used for 435 * entries, ressource allocation and bounds 436 * checking. */ 437 size_total = screen_info.lfb_size; 438 if (size_total < size_vmode) 439 size_total = size_vmode; 440 441 /* size_remap -- the amount of video memory we are going to 442 * use for efifb. With modern cards it is no 443 * option to simply use size_total as that 444 * wastes plenty of kernel address space. */ 445 size_remap = size_vmode * 2; 446 if (size_remap > size_total) 447 size_remap = size_total; 448 if (size_remap % PAGE_SIZE) 449 size_remap += PAGE_SIZE - (size_remap % PAGE_SIZE); 450 efifb_fix.smem_len = size_remap; 451 452 if (request_mem_region(efifb_fix.smem_start, size_remap, "efifb")) { 453 request_mem_succeeded = true; 454 } else { 455 /* We cannot make this fatal. Sometimes this comes from magic 456 spaces our resource handlers simply don't know about */ 457 pr_warn("efifb: cannot reserve video memory at 0x%lx\n", 458 efifb_fix.smem_start); 459 } 460 461 info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev); 462 if (!info) { 463 err = -ENOMEM; 464 goto err_release_mem; 465 } 466 platform_set_drvdata(dev, info); 467 info->pseudo_palette = info->par; 468 info->par = NULL; 469 470 info->apertures = alloc_apertures(1); 471 if (!info->apertures) { 472 err = -ENOMEM; 473 goto err_release_fb; 474 } 475 info->apertures->ranges[0].base = efifb_fix.smem_start; 476 info->apertures->ranges[0].size = size_remap; 477 478 if (efi_enabled(EFI_MEMMAP) && 479 !efi_mem_desc_lookup(efifb_fix.smem_start, &md)) { 480 if ((efifb_fix.smem_start + efifb_fix.smem_len) > 481 (md.phys_addr + (md.num_pages << EFI_PAGE_SHIFT))) { 482 pr_err("efifb: video memory @ 0x%lx spans multiple EFI memory regions\n", 483 efifb_fix.smem_start); 484 err = -EIO; 485 goto err_release_fb; 486 } 487 /* 488 * If the UEFI memory map covers the efifb region, we may only 489 * remap it using the attributes the memory map prescribes. 490 */ 491 md.attribute &= EFI_MEMORY_UC | EFI_MEMORY_WC | 492 EFI_MEMORY_WT | EFI_MEMORY_WB; 493 if (md.attribute) { 494 mem_flags |= EFI_MEMORY_WT | EFI_MEMORY_WB; 495 mem_flags &= md.attribute; 496 } 497 } 498 if (mem_flags & EFI_MEMORY_WC) 499 info->screen_base = ioremap_wc(efifb_fix.smem_start, 500 efifb_fix.smem_len); 501 else if (mem_flags & EFI_MEMORY_UC) 502 info->screen_base = ioremap(efifb_fix.smem_start, 503 efifb_fix.smem_len); 504 else if (mem_flags & EFI_MEMORY_WT) 505 info->screen_base = memremap(efifb_fix.smem_start, 506 efifb_fix.smem_len, MEMREMAP_WT); 507 else if (mem_flags & EFI_MEMORY_WB) 508 info->screen_base = memremap(efifb_fix.smem_start, 509 efifb_fix.smem_len, MEMREMAP_WB); 510 if (!info->screen_base) { 511 pr_err("efifb: abort, cannot remap video memory 0x%x @ 0x%lx\n", 512 efifb_fix.smem_len, efifb_fix.smem_start); 513 err = -EIO; 514 goto err_release_fb; 515 } 516 517 efifb_show_boot_graphics(info); 518 519 pr_info("efifb: framebuffer at 0x%lx, using %dk, total %dk\n", 520 efifb_fix.smem_start, size_remap/1024, size_total/1024); 521 pr_info("efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n", 522 efifb_defined.xres, efifb_defined.yres, 523 efifb_defined.bits_per_pixel, efifb_fix.line_length, 524 screen_info.pages); 525 526 efifb_defined.xres_virtual = efifb_defined.xres; 527 efifb_defined.yres_virtual = efifb_fix.smem_len / 528 efifb_fix.line_length; 529 pr_info("efifb: scrolling: redraw\n"); 530 efifb_defined.yres_virtual = efifb_defined.yres; 531 532 /* some dummy values for timing to make fbset happy */ 533 efifb_defined.pixclock = 10000000 / efifb_defined.xres * 534 1000 / efifb_defined.yres; 535 efifb_defined.left_margin = (efifb_defined.xres / 8) & 0xf8; 536 efifb_defined.hsync_len = (efifb_defined.xres / 8) & 0xf8; 537 538 efifb_defined.red.offset = screen_info.red_pos; 539 efifb_defined.red.length = screen_info.red_size; 540 efifb_defined.green.offset = screen_info.green_pos; 541 efifb_defined.green.length = screen_info.green_size; 542 efifb_defined.blue.offset = screen_info.blue_pos; 543 efifb_defined.blue.length = screen_info.blue_size; 544 efifb_defined.transp.offset = screen_info.rsvd_pos; 545 efifb_defined.transp.length = screen_info.rsvd_size; 546 547 pr_info("efifb: %s: " 548 "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n", 549 "Truecolor", 550 screen_info.rsvd_size, 551 screen_info.red_size, 552 screen_info.green_size, 553 screen_info.blue_size, 554 screen_info.rsvd_pos, 555 screen_info.red_pos, 556 screen_info.green_pos, 557 screen_info.blue_pos); 558 559 efifb_fix.ypanstep = 0; 560 efifb_fix.ywrapstep = 0; 561 562 info->fbops = &efifb_ops; 563 info->var = efifb_defined; 564 info->fix = efifb_fix; 565 info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE; 566 567 orientation = drm_get_panel_orientation_quirk(efifb_defined.xres, 568 efifb_defined.yres); 569 switch (orientation) { 570 default: 571 info->fbcon_rotate_hint = FB_ROTATE_UR; 572 break; 573 case DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP: 574 info->fbcon_rotate_hint = FB_ROTATE_UD; 575 break; 576 case DRM_MODE_PANEL_ORIENTATION_LEFT_UP: 577 info->fbcon_rotate_hint = FB_ROTATE_CCW; 578 break; 579 case DRM_MODE_PANEL_ORIENTATION_RIGHT_UP: 580 info->fbcon_rotate_hint = FB_ROTATE_CW; 581 break; 582 } 583 584 err = sysfs_create_groups(&dev->dev.kobj, efifb_groups); 585 if (err) { 586 pr_err("efifb: cannot add sysfs attrs\n"); 587 goto err_unmap; 588 } 589 err = fb_alloc_cmap(&info->cmap, 256, 0); 590 if (err < 0) { 591 pr_err("efifb: cannot allocate colormap\n"); 592 goto err_groups; 593 } 594 595 if (efifb_pci_dev) 596 WARN_ON(pm_runtime_get_sync(&efifb_pci_dev->dev) < 0); 597 598 err = register_framebuffer(info); 599 if (err < 0) { 600 pr_err("efifb: cannot register framebuffer\n"); 601 goto err_put_rpm_ref; 602 } 603 fb_info(info, "%s frame buffer device\n", info->fix.id); 604 return 0; 605 606 err_put_rpm_ref: 607 if (efifb_pci_dev) 608 pm_runtime_put(&efifb_pci_dev->dev); 609 610 fb_dealloc_cmap(&info->cmap); 611 err_groups: 612 sysfs_remove_groups(&dev->dev.kobj, efifb_groups); 613 err_unmap: 614 if (mem_flags & (EFI_MEMORY_UC | EFI_MEMORY_WC)) 615 iounmap(info->screen_base); 616 else 617 memunmap(info->screen_base); 618 err_release_fb: 619 framebuffer_release(info); 620 err_release_mem: 621 if (request_mem_succeeded) 622 release_mem_region(efifb_fix.smem_start, size_total); 623 return err; 624 } 625 626 static int efifb_remove(struct platform_device *pdev) 627 { 628 struct fb_info *info = platform_get_drvdata(pdev); 629 630 /* efifb_destroy takes care of info cleanup */ 631 unregister_framebuffer(info); 632 sysfs_remove_groups(&pdev->dev.kobj, efifb_groups); 633 634 return 0; 635 } 636 637 static struct platform_driver efifb_driver = { 638 .driver = { 639 .name = "efi-framebuffer", 640 }, 641 .probe = efifb_probe, 642 .remove = efifb_remove, 643 }; 644 645 builtin_platform_driver(efifb_driver); 646 647 #if defined(CONFIG_PCI) 648 649 static void record_efifb_bar_resource(struct pci_dev *dev, int idx, u64 offset) 650 { 651 u16 word; 652 653 efifb_pci_dev = dev; 654 655 pci_read_config_word(dev, PCI_COMMAND, &word); 656 if (!(word & PCI_COMMAND_MEMORY)) { 657 pci_dev_disabled = true; 658 dev_err(&dev->dev, 659 "BAR %d: assigned to efifb but device is disabled!\n", 660 idx); 661 return; 662 } 663 664 bar_resource = &dev->resource[idx]; 665 bar_offset = offset; 666 667 dev_info(&dev->dev, "BAR %d: assigned to efifb\n", idx); 668 } 669 670 static void efifb_fixup_resources(struct pci_dev *dev) 671 { 672 u64 base = screen_info.lfb_base; 673 u64 size = screen_info.lfb_size; 674 int i; 675 676 if (efifb_pci_dev || screen_info.orig_video_isVGA != VIDEO_TYPE_EFI) 677 return; 678 679 if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) 680 base |= (u64)screen_info.ext_lfb_base << 32; 681 682 if (!base) 683 return; 684 685 for (i = 0; i < PCI_STD_NUM_BARS; i++) { 686 struct resource *res = &dev->resource[i]; 687 688 if (!(res->flags & IORESOURCE_MEM)) 689 continue; 690 691 if (res->start <= base && res->end >= base + size - 1) { 692 record_efifb_bar_resource(dev, i, base - res->start); 693 break; 694 } 695 } 696 } 697 DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY, 698 16, efifb_fixup_resources); 699 700 #endif 701