Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Huang Ying | 860 | 27.92% | 1 | 2.17% |
Hans de Goede | 781 | 25.36% | 6 | 13.04% |
Ard Biesheuvel | 515 | 16.72% | 7 | 15.22% |
Peter Jones | 314 | 10.19% | 4 | 8.70% |
Edgar (gimli) Hucek | 173 | 5.62% | 2 | 4.35% |
Matt Fleming | 85 | 2.76% | 1 | 2.17% |
David Herrmann | 81 | 2.63% | 3 | 6.52% |
Thomas Zimmermann | 68 | 2.21% | 2 | 4.35% |
Dave Airlie | 41 | 1.33% | 2 | 4.35% |
Marcin Ślusarz | 37 | 1.20% | 2 | 4.35% |
Max Staudt | 35 | 1.14% | 1 | 2.17% |
Matthew Garrett | 25 | 0.81% | 2 | 4.35% |
Imre Deak | 21 | 0.68% | 1 | 2.17% |
Kai-Heng Feng | 15 | 0.49% | 2 | 4.35% |
Andrew Lutomirski | 14 | 0.45% | 2 | 4.35% |
Joe Perches | 3 | 0.10% | 1 | 2.17% |
Brian Maly | 3 | 0.10% | 1 | 2.17% |
Uwe Kleine-König | 2 | 0.06% | 1 | 2.17% |
Denis Efremov | 2 | 0.06% | 1 | 2.17% |
Javier Martinez Canillas | 2 | 0.06% | 1 | 2.17% |
Jani Nikula | 1 | 0.03% | 1 | 2.17% |
Juergen Gross | 1 | 0.03% | 1 | 2.17% |
Greg Kroah-Hartman | 1 | 0.03% | 1 | 2.17% |
Total | 3080 | 46 |
// 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
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