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
efifb_setcolreg(unsigned regno,unsigned red,unsigned green,unsigned blue,unsigned transp,struct fb_info * info)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
efifb_copy_bmp(u8 * src,u32 * dst,int width,struct screen_info * si)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 */
efifb_bgrt_sanity_check(struct screen_info * si,u32 bmp_width)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
efifb_bgrt_sanity_check(struct screen_info * si,u32 bmp_width)149 static bool efifb_bgrt_sanity_check(struct screen_info *si, u32 bmp_width)
150 {
151 return true;
152 }
153 #endif
154
efifb_show_boot_graphics(struct fb_info * info)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
efifb_show_boot_graphics(struct fb_info * info)251 static inline void efifb_show_boot_graphics(struct fb_info *info) {}
252 #endif
253
efifb_destroy(struct fb_info * info)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
efifb_setup(char * options)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
fb_base_is_valid(void)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
efifb_probe(struct platform_device * dev)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_mem_desc_lookup(efifb_fix.smem_start, &md)) {
468 if ((efifb_fix.smem_start + efifb_fix.smem_len) >
469 (md.phys_addr + (md.num_pages << EFI_PAGE_SHIFT))) {
470 pr_err("efifb: video memory @ 0x%lx spans multiple EFI memory regions\n",
471 efifb_fix.smem_start);
472 err = -EIO;
473 goto err_release_fb;
474 }
475 /*
476 * If the UEFI memory map covers the efifb region, we may only
477 * remap it using the attributes the memory map prescribes.
478 */
479 mem_flags |= EFI_MEMORY_WT | EFI_MEMORY_WB;
480 mem_flags &= md.attribute;
481 }
482 if (mem_flags & EFI_MEMORY_WC)
483 info->screen_base = ioremap_wc(efifb_fix.smem_start,
484 efifb_fix.smem_len);
485 else if (mem_flags & EFI_MEMORY_UC)
486 info->screen_base = ioremap(efifb_fix.smem_start,
487 efifb_fix.smem_len);
488 else if (mem_flags & EFI_MEMORY_WT)
489 info->screen_base = memremap(efifb_fix.smem_start,
490 efifb_fix.smem_len, MEMREMAP_WT);
491 else if (mem_flags & EFI_MEMORY_WB)
492 info->screen_base = memremap(efifb_fix.smem_start,
493 efifb_fix.smem_len, MEMREMAP_WB);
494 if (!info->screen_base) {
495 pr_err("efifb: abort, cannot remap video memory 0x%x @ 0x%lx\n",
496 efifb_fix.smem_len, efifb_fix.smem_start);
497 err = -EIO;
498 goto err_release_fb;
499 }
500
501 efifb_show_boot_graphics(info);
502
503 pr_info("efifb: framebuffer at 0x%lx, using %dk, total %dk\n",
504 efifb_fix.smem_start, size_remap/1024, size_total/1024);
505 pr_info("efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
506 efifb_defined.xres, efifb_defined.yres,
507 efifb_defined.bits_per_pixel, efifb_fix.line_length,
508 screen_info.pages);
509
510 efifb_defined.xres_virtual = efifb_defined.xres;
511 efifb_defined.yres_virtual = efifb_fix.smem_len /
512 efifb_fix.line_length;
513 pr_info("efifb: scrolling: redraw\n");
514 efifb_defined.yres_virtual = efifb_defined.yres;
515
516 /* some dummy values for timing to make fbset happy */
517 efifb_defined.pixclock = 10000000 / efifb_defined.xres *
518 1000 / efifb_defined.yres;
519 efifb_defined.left_margin = (efifb_defined.xres / 8) & 0xf8;
520 efifb_defined.hsync_len = (efifb_defined.xres / 8) & 0xf8;
521
522 efifb_defined.red.offset = screen_info.red_pos;
523 efifb_defined.red.length = screen_info.red_size;
524 efifb_defined.green.offset = screen_info.green_pos;
525 efifb_defined.green.length = screen_info.green_size;
526 efifb_defined.blue.offset = screen_info.blue_pos;
527 efifb_defined.blue.length = screen_info.blue_size;
528 efifb_defined.transp.offset = screen_info.rsvd_pos;
529 efifb_defined.transp.length = screen_info.rsvd_size;
530
531 pr_info("efifb: %s: "
532 "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
533 "Truecolor",
534 screen_info.rsvd_size,
535 screen_info.red_size,
536 screen_info.green_size,
537 screen_info.blue_size,
538 screen_info.rsvd_pos,
539 screen_info.red_pos,
540 screen_info.green_pos,
541 screen_info.blue_pos);
542
543 efifb_fix.ypanstep = 0;
544 efifb_fix.ywrapstep = 0;
545
546 info->fbops = &efifb_ops;
547 info->var = efifb_defined;
548 info->fix = efifb_fix;
549 info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE;
550
551 orientation = drm_get_panel_orientation_quirk(efifb_defined.xres,
552 efifb_defined.yres);
553 switch (orientation) {
554 default:
555 info->fbcon_rotate_hint = FB_ROTATE_UR;
556 break;
557 case DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP:
558 info->fbcon_rotate_hint = FB_ROTATE_UD;
559 break;
560 case DRM_MODE_PANEL_ORIENTATION_LEFT_UP:
561 info->fbcon_rotate_hint = FB_ROTATE_CCW;
562 break;
563 case DRM_MODE_PANEL_ORIENTATION_RIGHT_UP:
564 info->fbcon_rotate_hint = FB_ROTATE_CW;
565 break;
566 }
567
568 err = sysfs_create_groups(&dev->dev.kobj, efifb_groups);
569 if (err) {
570 pr_err("efifb: cannot add sysfs attrs\n");
571 goto err_unmap;
572 }
573 err = fb_alloc_cmap(&info->cmap, 256, 0);
574 if (err < 0) {
575 pr_err("efifb: cannot allocate colormap\n");
576 goto err_groups;
577 }
578 err = register_framebuffer(info);
579 if (err < 0) {
580 pr_err("efifb: cannot register framebuffer\n");
581 goto err_fb_dealoc;
582 }
583 fb_info(info, "%s frame buffer device\n", info->fix.id);
584 return 0;
585
586 err_fb_dealoc:
587 fb_dealloc_cmap(&info->cmap);
588 err_groups:
589 sysfs_remove_groups(&dev->dev.kobj, efifb_groups);
590 err_unmap:
591 if (mem_flags & (EFI_MEMORY_UC | EFI_MEMORY_WC))
592 iounmap(info->screen_base);
593 else
594 memunmap(info->screen_base);
595 err_release_fb:
596 framebuffer_release(info);
597 err_release_mem:
598 if (request_mem_succeeded)
599 release_mem_region(efifb_fix.smem_start, size_total);
600 return err;
601 }
602
efifb_remove(struct platform_device * pdev)603 static int efifb_remove(struct platform_device *pdev)
604 {
605 struct fb_info *info = platform_get_drvdata(pdev);
606
607 unregister_framebuffer(info);
608 sysfs_remove_groups(&pdev->dev.kobj, efifb_groups);
609 framebuffer_release(info);
610
611 return 0;
612 }
613
614 static struct platform_driver efifb_driver = {
615 .driver = {
616 .name = "efi-framebuffer",
617 },
618 .probe = efifb_probe,
619 .remove = efifb_remove,
620 };
621
622 builtin_platform_driver(efifb_driver);
623
624 #if defined(CONFIG_PCI)
625
record_efifb_bar_resource(struct pci_dev * dev,int idx,u64 offset)626 static void record_efifb_bar_resource(struct pci_dev *dev, int idx, u64 offset)
627 {
628 u16 word;
629
630 efifb_pci_dev = dev;
631
632 pci_read_config_word(dev, PCI_COMMAND, &word);
633 if (!(word & PCI_COMMAND_MEMORY)) {
634 pci_dev_disabled = true;
635 dev_err(&dev->dev,
636 "BAR %d: assigned to efifb but device is disabled!\n",
637 idx);
638 return;
639 }
640
641 bar_resource = &dev->resource[idx];
642 bar_offset = offset;
643
644 dev_info(&dev->dev, "BAR %d: assigned to efifb\n", idx);
645 }
646
efifb_fixup_resources(struct pci_dev * dev)647 static void efifb_fixup_resources(struct pci_dev *dev)
648 {
649 u64 base = screen_info.lfb_base;
650 u64 size = screen_info.lfb_size;
651 int i;
652
653 if (efifb_pci_dev || screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
654 return;
655
656 if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)
657 base |= (u64)screen_info.ext_lfb_base << 32;
658
659 if (!base)
660 return;
661
662 for (i = 0; i <= PCI_STD_RESOURCE_END; i++) {
663 struct resource *res = &dev->resource[i];
664
665 if (!(res->flags & IORESOURCE_MEM))
666 continue;
667
668 if (res->start <= base && res->end >= base + size - 1) {
669 record_efifb_bar_resource(dev, i, base - res->start);
670 break;
671 }
672 }
673 }
674 DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY,
675 16, efifb_fixup_resources);
676
677 #endif
678
