| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Framebuffer driver for EFI/UEFI based system |
| * |
| * (c) 2006 Edgar Hucek <gimli@dark-green.com> |
| * Original efi driver written by Gerd Knorr <kraxel@goldbach.in-berlin.de> |
| * |
| */ |
| |
| #include <linux/aperture.h> |
| #include <linux/kernel.h> |
| #include <linux/efi.h> |
| #include <linux/efi-bgrt.h> |
| #include <linux/errno.h> |
| #include <linux/fb.h> |
| #include <linux/pci.h> |
| #include <linux/platform_device.h> |
| #include <linux/printk.h> |
| #include <linux/screen_info.h> |
| #include <linux/pm_runtime.h> |
| #include <video/vga.h> |
| #include <asm/efi.h> |
| #include <drm/drm_utils.h> /* For drm_get_panel_orientation_quirk */ |
| #include <drm/drm_connector.h> /* For DRM_MODE_PANEL_ORIENTATION_* */ |
| |
| struct bmp_file_header { |
| u16 id; |
| u32 file_size; |
| u32 reserved; |
| u32 bitmap_offset; |
| } __packed; |
| |
| struct bmp_dib_header { |
| u32 dib_header_size; |
| s32 width; |
| s32 height; |
| u16 planes; |
| u16 bpp; |
| u32 compression; |
| u32 bitmap_size; |
| u32 horz_resolution; |
| u32 vert_resolution; |
| u32 colors_used; |
| u32 colors_important; |
| } __packed; |
| |
| static bool use_bgrt = true; |
| static bool request_mem_succeeded = false; |
| static u64 mem_flags = EFI_MEMORY_WC | EFI_MEMORY_UC; |
| |
| static struct pci_dev *efifb_pci_dev; /* dev with BAR covering the efifb */ |
| |
| struct efifb_par { |
| u32 pseudo_palette[16]; |
| resource_size_t base; |
| resource_size_t size; |
| }; |
| |
| static struct fb_var_screeninfo efifb_defined = { |
| .activate = FB_ACTIVATE_NOW, |
| .height = -1, |
| .width = -1, |
| .right_margin = 32, |
| .upper_margin = 16, |
| .lower_margin = 4, |
| .vsync_len = 4, |
| .vmode = FB_VMODE_NONINTERLACED, |
| }; |
| |
| static struct fb_fix_screeninfo efifb_fix = { |
| .id = "EFI VGA", |
| .type = FB_TYPE_PACKED_PIXELS, |
| .accel = FB_ACCEL_NONE, |
| .visual = FB_VISUAL_TRUECOLOR, |
| }; |
| |
| static int efifb_setcolreg(unsigned regno, unsigned red, unsigned green, |
| unsigned blue, unsigned transp, |
| struct fb_info *info) |
| { |
| /* |
| * Set a single color register. The values supplied are |
| * already rounded down to the hardware's capabilities |
| * (according to the entries in the `var' structure). Return |
| * != 0 for invalid regno. |
| */ |
| |
| if (regno >= info->cmap.len) |
| return 1; |
| |
| if (regno < 16) { |
| red >>= 16 - info->var.red.length; |
| green >>= 16 - info->var.green.length; |
| blue >>= 16 - info->var.blue.length; |
| ((u32 *)(info->pseudo_palette))[regno] = |
| (red << info->var.red.offset) | |
| (green << info->var.green.offset) | |
| (blue << info->var.blue.offset); |
| } |
| return 0; |
| } |
| |
| /* |
| * If fbcon deffered console takeover is configured, the intent is for the |
| * framebuffer to show the boot graphics (e.g. vendor logo) until there is some |
| * (error) message to display. But the boot graphics may have been destroyed by |
| * e.g. option ROM output, detect this and restore the boot graphics. |
| */ |
| #if defined CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER && \ |
| defined CONFIG_ACPI_BGRT |
| static void efifb_copy_bmp(u8 *src, u32 *dst, int width, struct screen_info *si) |
| { |
| u8 r, g, b; |
| |
| while (width--) { |
| b = *src++; |
| g = *src++; |
| r = *src++; |
| *dst++ = (r << si->red_pos) | |
| (g << si->green_pos) | |
| (b << si->blue_pos); |
| } |
| } |
| |
| #ifdef CONFIG_X86 |
| /* |
| * On x86 some firmwares use a low non native resolution for the display when |
| * they have shown some text messages. While keeping the bgrt filled with info |
| * for the native resolution. If the bgrt image intended for the native |
| * resolution still fits, it will be displayed very close to the right edge of |
| * the display looking quite bad. This function checks for this. |
| */ |
| static bool efifb_bgrt_sanity_check(struct screen_info *si, u32 bmp_width) |
| { |
| /* |
| * All x86 firmwares horizontally center the image (the yoffset |
| * calculations differ between boards, but xoffset is predictable). |
| */ |
| u32 expected_xoffset = (si->lfb_width - bmp_width) / 2; |
| |
| return bgrt_tab.image_offset_x == expected_xoffset; |
| } |
| #else |
| static bool efifb_bgrt_sanity_check(struct screen_info *si, u32 bmp_width) |
| { |
| return true; |
| } |
| #endif |
| |
| static void efifb_show_boot_graphics(struct fb_info *info) |
| { |
| u32 bmp_width, bmp_height, bmp_pitch, dst_x, y, src_y; |
| struct screen_info *si = &screen_info; |
| struct bmp_file_header *file_header; |
| struct bmp_dib_header *dib_header; |
| void *bgrt_image = NULL; |
| u8 *dst = info->screen_base; |
| |
| if (!use_bgrt) |
| return; |
| |
| if (!bgrt_tab.image_address) { |
| pr_info("efifb: No BGRT, not showing boot graphics\n"); |
| return; |
| } |
| |
| if (bgrt_tab.status & 0x06) { |
| pr_info("efifb: BGRT rotation bits set, not showing boot graphics\n"); |
| return; |
| } |
| |
| /* Avoid flashing the logo if we're going to print std probe messages */ |
| if (console_loglevel > CONSOLE_LOGLEVEL_QUIET) |
| return; |
| |
| /* bgrt_tab.status is unreliable, so we don't check it */ |
| |
| if (si->lfb_depth != 32) { |
| pr_info("efifb: not 32 bits, not showing boot graphics\n"); |
| return; |
| } |
| |
| bgrt_image = memremap(bgrt_tab.image_address, bgrt_image_size, |
| MEMREMAP_WB); |
| if (!bgrt_image) { |
| pr_warn("efifb: Ignoring BGRT: failed to map image memory\n"); |
| return; |
| } |
| |
| if (bgrt_image_size < (sizeof(*file_header) + sizeof(*dib_header))) |
| goto error; |
| |
| file_header = bgrt_image; |
| if (file_header->id != 0x4d42 || file_header->reserved != 0) |
| goto error; |
| |
| dib_header = bgrt_image + sizeof(*file_header); |
| if (dib_header->dib_header_size != 40 || dib_header->width < 0 || |
| dib_header->planes != 1 || dib_header->bpp != 24 || |
| dib_header->compression != 0) |
| goto error; |
| |
| bmp_width = dib_header->width; |
| bmp_height = abs(dib_header->height); |
| bmp_pitch = round_up(3 * bmp_width, 4); |
| |
| if ((file_header->bitmap_offset + bmp_pitch * bmp_height) > |
| bgrt_image_size) |
| goto error; |
| |
| if ((bgrt_tab.image_offset_x + bmp_width) > si->lfb_width || |
| (bgrt_tab.image_offset_y + bmp_height) > si->lfb_height) |
| goto error; |
| |
| if (!efifb_bgrt_sanity_check(si, bmp_width)) |
| goto error; |
| |
| pr_info("efifb: showing boot graphics\n"); |
| |
| for (y = 0; y < si->lfb_height; y++, dst += si->lfb_linelength) { |
| /* Only background? */ |
| if (y < bgrt_tab.image_offset_y || |
| y >= (bgrt_tab.image_offset_y + bmp_height)) { |
| memset(dst, 0, 4 * si->lfb_width); |
| continue; |
| } |
| |
| src_y = y - bgrt_tab.image_offset_y; |
| /* Positive header height means upside down row order */ |
| if (dib_header->height > 0) |
| src_y = (bmp_height - 1) - src_y; |
| |
| memset(dst, 0, bgrt_tab.image_offset_x * 4); |
| dst_x = bgrt_tab.image_offset_x; |
| efifb_copy_bmp(bgrt_image + file_header->bitmap_offset + |
| src_y * bmp_pitch, |
| (u32 *)dst + dst_x, bmp_width, si); |
| dst_x += bmp_width; |
| memset((u32 *)dst + dst_x, 0, (si->lfb_width - dst_x) * 4); |
| } |
| |
| memunmap(bgrt_image); |
| return; |
| |
| error: |
| memunmap(bgrt_image); |
| pr_warn("efifb: Ignoring BGRT: unexpected or invalid BMP data\n"); |
| } |
| #else |
| static inline void efifb_show_boot_graphics(struct fb_info *info) {} |
| #endif |
| |
| /* |
| * fb_ops.fb_destroy is called by the last put_fb_info() call at the end |
| * of unregister_framebuffer() or fb_release(). Do any cleanup here. |
| */ |
| static void efifb_destroy(struct fb_info *info) |
| { |
| struct efifb_par *par = info->par; |
| |
| if (efifb_pci_dev) |
| pm_runtime_put(&efifb_pci_dev->dev); |
| |
| if (info->screen_base) { |
| if (mem_flags & (EFI_MEMORY_UC | EFI_MEMORY_WC)) |
| iounmap(info->screen_base); |
| else |
| memunmap(info->screen_base); |
| } |
| |
| if (request_mem_succeeded) |
| release_mem_region(par->base, par->size); |
| fb_dealloc_cmap(&info->cmap); |
| |
| framebuffer_release(info); |
| } |
| |
| static const struct fb_ops efifb_ops = { |
| .owner = THIS_MODULE, |
| .fb_destroy = efifb_destroy, |
| .fb_setcolreg = efifb_setcolreg, |
| .fb_fillrect = cfb_fillrect, |
| .fb_copyarea = cfb_copyarea, |
| .fb_imageblit = cfb_imageblit, |
| }; |
| |
| static int efifb_setup(char *options) |
| { |
| char *this_opt; |
| |
| if (options && *options) { |
| while ((this_opt = strsep(&options, ",")) != NULL) { |
| if (!*this_opt) continue; |
| |
| efifb_setup_from_dmi(&screen_info, this_opt); |
| |
| if (!strncmp(this_opt, "base:", 5)) |
| screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0); |
| else if (!strncmp(this_opt, "stride:", 7)) |
| screen_info.lfb_linelength = simple_strtoul(this_opt+7, NULL, 0) * 4; |
| else if (!strncmp(this_opt, "height:", 7)) |
| screen_info.lfb_height = simple_strtoul(this_opt+7, NULL, 0); |
| else if (!strncmp(this_opt, "width:", 6)) |
| screen_info.lfb_width = simple_strtoul(this_opt+6, NULL, 0); |
| else if (!strcmp(this_opt, "nowc")) |
| mem_flags &= ~EFI_MEMORY_WC; |
| else if (!strcmp(this_opt, "nobgrt")) |
| use_bgrt = false; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static inline bool fb_base_is_valid(void) |
| { |
| if (screen_info.lfb_base) |
| return true; |
| |
| if (!(screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)) |
| return false; |
| |
| if (screen_info.ext_lfb_base) |
| return true; |
| |
| return false; |
| } |
| |
| #define efifb_attr_decl(name, fmt) \ |
| static ssize_t name##_show(struct device *dev, \ |
| struct device_attribute *attr, \ |
| char *buf) \ |
| { \ |
| return sprintf(buf, fmt "\n", (screen_info.lfb_##name)); \ |
| } \ |
| static DEVICE_ATTR_RO(name) |
| |
| efifb_attr_decl(base, "0x%x"); |
| efifb_attr_decl(linelength, "%u"); |
| efifb_attr_decl(height, "%u"); |
| efifb_attr_decl(width, "%u"); |
| efifb_attr_decl(depth, "%u"); |
| |
| static struct attribute *efifb_attrs[] = { |
| &dev_attr_base.attr, |
| &dev_attr_linelength.attr, |
| &dev_attr_width.attr, |
| &dev_attr_height.attr, |
| &dev_attr_depth.attr, |
| NULL |
| }; |
| ATTRIBUTE_GROUPS(efifb); |
| |
| static bool pci_dev_disabled; /* FB base matches BAR of a disabled device */ |
| |
| static struct resource *bar_resource; |
| static u64 bar_offset; |
| |
| static int efifb_probe(struct platform_device *dev) |
| { |
| struct fb_info *info; |
| struct efifb_par *par; |
| int err, orientation; |
| unsigned int size_vmode; |
| unsigned int size_remap; |
| unsigned int size_total; |
| char *option = NULL; |
| efi_memory_desc_t md; |
| |
| if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI || pci_dev_disabled) |
| return -ENODEV; |
| |
| if (fb_get_options("efifb", &option)) |
| return -ENODEV; |
| efifb_setup(option); |
| |
| /* We don't get linelength from UGA Draw Protocol, only from |
| * EFI Graphics Protocol. So if it's not in DMI, and it's not |
| * passed in from the user, we really can't use the framebuffer. |
| */ |
| if (!screen_info.lfb_linelength) |
| return -ENODEV; |
| |
| if (!screen_info.lfb_depth) |
| screen_info.lfb_depth = 32; |
| if (!screen_info.pages) |
| screen_info.pages = 1; |
| if (!fb_base_is_valid()) { |
| printk(KERN_DEBUG "efifb: invalid framebuffer address\n"); |
| return -ENODEV; |
| } |
| printk(KERN_INFO "efifb: probing for efifb\n"); |
| |
| /* just assume they're all unset if any are */ |
| if (!screen_info.blue_size) { |
| screen_info.blue_size = 8; |
| screen_info.blue_pos = 0; |
| screen_info.green_size = 8; |
| screen_info.green_pos = 8; |
| screen_info.red_size = 8; |
| screen_info.red_pos = 16; |
| screen_info.rsvd_size = 8; |
| screen_info.rsvd_pos = 24; |
| } |
| |
| efifb_fix.smem_start = screen_info.lfb_base; |
| |
| if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) { |
| u64 ext_lfb_base; |
| |
| ext_lfb_base = (u64)(unsigned long)screen_info.ext_lfb_base << 32; |
| efifb_fix.smem_start |= ext_lfb_base; |
| } |
| |
| if (bar_resource && |
| bar_resource->start + bar_offset != efifb_fix.smem_start) { |
| dev_info(&efifb_pci_dev->dev, |
| "BAR has moved, updating efifb address\n"); |
| efifb_fix.smem_start = bar_resource->start + bar_offset; |
| } |
| |
| efifb_defined.bits_per_pixel = screen_info.lfb_depth; |
| efifb_defined.xres = screen_info.lfb_width; |
| efifb_defined.yres = screen_info.lfb_height; |
| efifb_fix.line_length = screen_info.lfb_linelength; |
| |
| /* size_vmode -- that is the amount of memory needed for the |
| * used video mode, i.e. the minimum amount of |
| * memory we need. */ |
| size_vmode = efifb_defined.yres * efifb_fix.line_length; |
| |
| /* size_total -- all video memory we have. Used for |
| * entries, ressource allocation and bounds |
| * checking. */ |
| size_total = screen_info.lfb_size; |
| if (size_total < size_vmode) |
| size_total = size_vmode; |
| |
| /* size_remap -- the amount of video memory we are going to |
| * use for efifb. With modern cards it is no |
| * option to simply use size_total as that |
| * wastes plenty of kernel address space. */ |
| size_remap = size_vmode * 2; |
| if (size_remap > size_total) |
| size_remap = size_total; |
| if (size_remap % PAGE_SIZE) |
| size_remap += PAGE_SIZE - (size_remap % PAGE_SIZE); |
| efifb_fix.smem_len = size_remap; |
| |
| if (request_mem_region(efifb_fix.smem_start, size_remap, "efifb")) { |
| request_mem_succeeded = true; |
| } else { |
| /* We cannot make this fatal. Sometimes this comes from magic |
| spaces our resource handlers simply don't know about */ |
| pr_warn("efifb: cannot reserve video memory at 0x%lx\n", |
| efifb_fix.smem_start); |
| } |
| |
| info = framebuffer_alloc(sizeof(*par), &dev->dev); |
| if (!info) { |
| err = -ENOMEM; |
| goto err_release_mem; |
| } |
| platform_set_drvdata(dev, info); |
| par = info->par; |
| info->pseudo_palette = par->pseudo_palette; |
| |
| par->base = efifb_fix.smem_start; |
| par->size = size_remap; |
| |
| if (efi_enabled(EFI_MEMMAP) && |
| !efi_mem_desc_lookup(efifb_fix.smem_start, &md)) { |
| if ((efifb_fix.smem_start + efifb_fix.smem_len) > |
| (md.phys_addr + (md.num_pages << EFI_PAGE_SHIFT))) { |
| pr_err("efifb: video memory @ 0x%lx spans multiple EFI memory regions\n", |
| efifb_fix.smem_start); |
| err = -EIO; |
| goto err_release_fb; |
| } |
| /* |
| * If the UEFI memory map covers the efifb region, we may only |
| * remap it using the attributes the memory map prescribes. |
| */ |
| md.attribute &= EFI_MEMORY_UC | EFI_MEMORY_WC | |
| EFI_MEMORY_WT | EFI_MEMORY_WB; |
| if (md.attribute) { |
| mem_flags |= EFI_MEMORY_WT | EFI_MEMORY_WB; |
| mem_flags &= md.attribute; |
| } |
| } |
| if (mem_flags & EFI_MEMORY_WC) |
| info->screen_base = ioremap_wc(efifb_fix.smem_start, |
| efifb_fix.smem_len); |
| else if (mem_flags & EFI_MEMORY_UC) |
| info->screen_base = ioremap(efifb_fix.smem_start, |
| efifb_fix.smem_len); |
| else if (mem_flags & EFI_MEMORY_WT) |
| info->screen_base = memremap(efifb_fix.smem_start, |
| efifb_fix.smem_len, MEMREMAP_WT); |
| else if (mem_flags & EFI_MEMORY_WB) |
| info->screen_base = memremap(efifb_fix.smem_start, |
| efifb_fix.smem_len, MEMREMAP_WB); |
| if (!info->screen_base) { |
| pr_err("efifb: abort, cannot remap video memory 0x%x @ 0x%lx\n", |
| efifb_fix.smem_len, efifb_fix.smem_start); |
| err = -EIO; |
| goto err_release_fb; |
| } |
| |
| efifb_show_boot_graphics(info); |
| |
| pr_info("efifb: framebuffer at 0x%lx, using %dk, total %dk\n", |
| efifb_fix.smem_start, size_remap/1024, size_total/1024); |
| pr_info("efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n", |
| efifb_defined.xres, efifb_defined.yres, |
| efifb_defined.bits_per_pixel, efifb_fix.line_length, |
| screen_info.pages); |
| |
| efifb_defined.xres_virtual = efifb_defined.xres; |
| efifb_defined.yres_virtual = efifb_fix.smem_len / |
| efifb_fix.line_length; |
| pr_info("efifb: scrolling: redraw\n"); |
| efifb_defined.yres_virtual = efifb_defined.yres; |
| |
| /* some dummy values for timing to make fbset happy */ |
| efifb_defined.pixclock = 10000000 / efifb_defined.xres * |
| 1000 / efifb_defined.yres; |
| efifb_defined.left_margin = (efifb_defined.xres / 8) & 0xf8; |
| efifb_defined.hsync_len = (efifb_defined.xres / 8) & 0xf8; |
| |
| efifb_defined.red.offset = screen_info.red_pos; |
| efifb_defined.red.length = screen_info.red_size; |
| efifb_defined.green.offset = screen_info.green_pos; |
| efifb_defined.green.length = screen_info.green_size; |
| efifb_defined.blue.offset = screen_info.blue_pos; |
| efifb_defined.blue.length = screen_info.blue_size; |
| efifb_defined.transp.offset = screen_info.rsvd_pos; |
| efifb_defined.transp.length = screen_info.rsvd_size; |
| |
| pr_info("efifb: %s: " |
| "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n", |
| "Truecolor", |
| screen_info.rsvd_size, |
| screen_info.red_size, |
| screen_info.green_size, |
| screen_info.blue_size, |
| screen_info.rsvd_pos, |
| screen_info.red_pos, |
| screen_info.green_pos, |
| screen_info.blue_pos); |
| |
| efifb_fix.ypanstep = 0; |
| efifb_fix.ywrapstep = 0; |
| |
| info->fbops = &efifb_ops; |
| info->var = efifb_defined; |
| info->fix = efifb_fix; |
| info->flags = FBINFO_FLAG_DEFAULT; |
| |
| orientation = drm_get_panel_orientation_quirk(efifb_defined.xres, |
| efifb_defined.yres); |
| switch (orientation) { |
| default: |
| info->fbcon_rotate_hint = FB_ROTATE_UR; |
| break; |
| case DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP: |
| info->fbcon_rotate_hint = FB_ROTATE_UD; |
| break; |
| case DRM_MODE_PANEL_ORIENTATION_LEFT_UP: |
| info->fbcon_rotate_hint = FB_ROTATE_CCW; |
| break; |
| case DRM_MODE_PANEL_ORIENTATION_RIGHT_UP: |
| info->fbcon_rotate_hint = FB_ROTATE_CW; |
| break; |
| } |
| |
| err = sysfs_create_groups(&dev->dev.kobj, efifb_groups); |
| if (err) { |
| pr_err("efifb: cannot add sysfs attrs\n"); |
| goto err_unmap; |
| } |
| err = fb_alloc_cmap(&info->cmap, 256, 0); |
| if (err < 0) { |
| pr_err("efifb: cannot allocate colormap\n"); |
| goto err_groups; |
| } |
| |
| if (efifb_pci_dev) |
| WARN_ON(pm_runtime_get_sync(&efifb_pci_dev->dev) < 0); |
| |
| err = devm_aperture_acquire_for_platform_device(dev, par->base, par->size); |
| if (err) { |
| pr_err("efifb: cannot acquire aperture\n"); |
| goto err_put_rpm_ref; |
| } |
| err = register_framebuffer(info); |
| if (err < 0) { |
| pr_err("efifb: cannot register framebuffer\n"); |
| goto err_put_rpm_ref; |
| } |
| fb_info(info, "%s frame buffer device\n", info->fix.id); |
| return 0; |
| |
| err_put_rpm_ref: |
| if (efifb_pci_dev) |
| pm_runtime_put(&efifb_pci_dev->dev); |
| |
| fb_dealloc_cmap(&info->cmap); |
| err_groups: |
| sysfs_remove_groups(&dev->dev.kobj, efifb_groups); |
| err_unmap: |
| if (mem_flags & (EFI_MEMORY_UC | EFI_MEMORY_WC)) |
| iounmap(info->screen_base); |
| else |
| memunmap(info->screen_base); |
| err_release_fb: |
| framebuffer_release(info); |
| err_release_mem: |
| if (request_mem_succeeded) |
| release_mem_region(efifb_fix.smem_start, size_total); |
| return err; |
| } |
| |
| static void efifb_remove(struct platform_device *pdev) |
| { |
| struct fb_info *info = platform_get_drvdata(pdev); |
| |
| /* efifb_destroy takes care of info cleanup */ |
| unregister_framebuffer(info); |
| sysfs_remove_groups(&pdev->dev.kobj, efifb_groups); |
| } |
| |
| static struct platform_driver efifb_driver = { |
| .driver = { |
| .name = "efi-framebuffer", |
| }, |
| .probe = efifb_probe, |
| .remove_new = efifb_remove, |
| }; |
| |
| builtin_platform_driver(efifb_driver); |
| |
| #if defined(CONFIG_PCI) |
| |
| static void record_efifb_bar_resource(struct pci_dev *dev, int idx, u64 offset) |
| { |
| u16 word; |
| |
| efifb_pci_dev = dev; |
| |
| pci_read_config_word(dev, PCI_COMMAND, &word); |
| if (!(word & PCI_COMMAND_MEMORY)) { |
| pci_dev_disabled = true; |
| dev_err(&dev->dev, |
| "BAR %d: assigned to efifb but device is disabled!\n", |
| idx); |
| return; |
| } |
| |
| bar_resource = &dev->resource[idx]; |
| bar_offset = offset; |
| |
| dev_info(&dev->dev, "BAR %d: assigned to efifb\n", idx); |
| } |
| |
| static void efifb_fixup_resources(struct pci_dev *dev) |
| { |
| u64 base = screen_info.lfb_base; |
| u64 size = screen_info.lfb_size; |
| int i; |
| |
| if (efifb_pci_dev || screen_info.orig_video_isVGA != VIDEO_TYPE_EFI) |
| return; |
| |
| if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) |
| base |= (u64)screen_info.ext_lfb_base << 32; |
| |
| if (!base) |
| return; |
| |
| for (i = 0; i < PCI_STD_NUM_BARS; i++) { |
| struct resource *res = &dev->resource[i]; |
| |
| if (!(res->flags & IORESOURCE_MEM)) |
| continue; |
| |
| if (res->start <= base && res->end >= base + size - 1) { |
| record_efifb_bar_resource(dev, i, base - res->start); |
| break; |
| } |
| } |
| } |
| DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY, |
| 16, efifb_fixup_resources); |
| |
| #endif |