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Mon, 24 Nov 2025 16:51:25 +0000 From: Thomas Zimmermann To: ardb@kernel.org, javierm@redhat.com, arnd@arndb.de, richard.lyu@suse.com Cc: x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org, loongarch@lists.linux.dev, linux-riscv@lists.infradead.org, dri-devel@lists.freedesktop.org, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-fbdev@vger.kernel.org, Thomas Zimmermann Subject: [PATCH v2 02/10] efi: sysfb_efi: Reduce number of references to global screen_info Date: Mon, 24 Nov 2025 17:40:14 +0100 Message-ID: <20251124165116.502813-3-tzimmermann@suse.de> X-Mailer: git-send-email 2.51.1 In-Reply-To: <20251124165116.502813-1-tzimmermann@suse.de> References: <20251124165116.502813-1-tzimmermann@suse.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: E01C02209D X-Rspamd-Action: no action X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Spamd-Result: default: False [-3.01 / 50.00]; BAYES_HAM(-3.00)[100.00%]; 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This will later reduce churn when screen_info is being moved. Signed-off-by: Thomas Zimmermann Reviewed-by: Richard Lyu Acked-by: Arnd Bergmann Acked-by: Ard Biesheuvel --- drivers/firmware/efi/sysfb_efi.c | 81 ++++++++++++++++--------------- drivers/firmware/sysfb.c | 4 +- drivers/firmware/sysfb_simplefb.c | 2 +- include/linux/sysfb.h | 9 ++-- 4 files changed, 51 insertions(+), 45 deletions(-) diff --git a/drivers/firmware/efi/sysfb_efi.c b/drivers/firmware/efi/sysfb_efi.c index 1e509595ac03..8e0f9d08397f 100644 --- a/drivers/firmware/efi/sysfb_efi.c +++ b/drivers/firmware/efi/sysfb_efi.c @@ -92,7 +92,7 @@ void efifb_setup_from_dmi(struct screen_info *si, const char *opt) }) #ifdef CONFIG_EFI -static int __init efifb_set_system(const struct dmi_system_id *id) +static int __init efifb_set_system(struct screen_info *si, const struct dmi_system_id *id) { struct efifb_dmi_info *info = id->driver_data; @@ -101,14 +101,14 @@ static int __init efifb_set_system(const struct dmi_system_id *id) return 0; /* Trust the bootloader over the DMI tables */ - if (screen_info.lfb_base == 0) { + if (si->lfb_base == 0) { #if defined(CONFIG_PCI) struct pci_dev *dev = NULL; int found_bar = 0; #endif if (info->base) { - screen_info.lfb_base = choose_value(info->base, - screen_info.lfb_base, OVERRIDE_BASE, + si->lfb_base = choose_value(info->base, + si->lfb_base, OVERRIDE_BASE, info->flags); #if defined(CONFIG_PCI) @@ -135,49 +135,53 @@ static int __init efifb_set_system(const struct dmi_system_id *id) start = pci_resource_start(dev, i); end = pci_resource_end(dev, i); - if (screen_info.lfb_base >= start && - screen_info.lfb_base < end) { + if (si->lfb_base >= start && si->lfb_base < end) { found_bar = 1; break; } } } if (!found_bar) - screen_info.lfb_base = 0; + si->lfb_base = 0; #endif } } - if (screen_info.lfb_base) { - screen_info.lfb_linelength = choose_value(info->stride, - screen_info.lfb_linelength, OVERRIDE_STRIDE, + if (si->lfb_base) { + si->lfb_linelength = choose_value(info->stride, + si->lfb_linelength, OVERRIDE_STRIDE, info->flags); - screen_info.lfb_width = choose_value(info->width, - screen_info.lfb_width, OVERRIDE_WIDTH, + si->lfb_width = choose_value(info->width, + si->lfb_width, OVERRIDE_WIDTH, info->flags); - screen_info.lfb_height = choose_value(info->height, - screen_info.lfb_height, OVERRIDE_HEIGHT, + si->lfb_height = choose_value(info->height, + si->lfb_height, OVERRIDE_HEIGHT, info->flags); - if (screen_info.orig_video_isVGA == 0) - screen_info.orig_video_isVGA = VIDEO_TYPE_EFI; + if (si->orig_video_isVGA == 0) + si->orig_video_isVGA = VIDEO_TYPE_EFI; } else { - screen_info.lfb_linelength = 0; - screen_info.lfb_width = 0; - screen_info.lfb_height = 0; - screen_info.orig_video_isVGA = 0; + si->lfb_linelength = 0; + si->lfb_width = 0; + si->lfb_height = 0; + si->orig_video_isVGA = 0; return 0; } printk(KERN_INFO "efifb: dmi detected %s - framebuffer at 0x%08x " "(%dx%d, stride %d)\n", id->ident, - screen_info.lfb_base, screen_info.lfb_width, - screen_info.lfb_height, screen_info.lfb_linelength); + si->lfb_base, si->lfb_width, + si->lfb_height, si->lfb_linelength); return 1; } +static int __init efifb_set_system_callback(const struct dmi_system_id *id) +{ + return efifb_set_system(&screen_info, id); +} + #define EFIFB_DMI_SYSTEM_ID(vendor, name, enumid) \ { \ - efifb_set_system, \ + efifb_set_system_callback, \ name, \ { \ DMI_MATCH(DMI_BIOS_VENDOR, vendor), \ @@ -284,12 +288,13 @@ static const struct dmi_system_id efifb_dmi_swap_width_height[] __initconst = { {}, }; -static bool efifb_overlaps_pci_range(const struct of_pci_range *range) +static bool efifb_overlaps_pci_range(const struct screen_info *si, + const struct of_pci_range *range) { - u64 fb_base = screen_info.lfb_base; + u64 fb_base = si->lfb_base; - if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) - fb_base |= (u64)(unsigned long)screen_info.ext_lfb_base << 32; + if (si->capabilities & VIDEO_CAPABILITY_64BIT_BASE) + fb_base |= (u64)(unsigned long)si->ext_lfb_base << 32; return fb_base >= range->cpu_addr && fb_base < (range->cpu_addr + range->size); @@ -311,7 +316,7 @@ static struct device_node *find_pci_overlap_node(void) } for_each_of_pci_range(&parser, &range) - if (efifb_overlaps_pci_range(&range)) + if (efifb_overlaps_pci_range(&screen_info, &range)) return np; } return NULL; @@ -349,25 +354,25 @@ static const struct fwnode_operations efifb_fwnode_ops = { static struct fwnode_handle efifb_fwnode; -__init void sysfb_apply_efi_quirks(void) +__init void sysfb_apply_efi_quirks(struct screen_info *si) { - if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI || - !(screen_info.capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS)) + if (si->orig_video_isVGA != VIDEO_TYPE_EFI || + !(si->capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS)) dmi_check_system(efifb_dmi_system_table); - if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI && + if (si->orig_video_isVGA == VIDEO_TYPE_EFI && dmi_check_system(efifb_dmi_swap_width_height)) { - u16 temp = screen_info.lfb_width; + u16 temp = si->lfb_width; - screen_info.lfb_width = screen_info.lfb_height; - screen_info.lfb_height = temp; - screen_info.lfb_linelength = 4 * screen_info.lfb_width; + si->lfb_width = si->lfb_height; + si->lfb_height = temp; + si->lfb_linelength = 4 * si->lfb_width; } } -__init void sysfb_set_efifb_fwnode(struct platform_device *pd) +__init void sysfb_set_efifb_fwnode(const struct screen_info *si, struct platform_device *pd) { - if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI && IS_ENABLED(CONFIG_PCI)) { + if (si->orig_video_isVGA == VIDEO_TYPE_EFI && IS_ENABLED(CONFIG_PCI)) { fwnode_init(&efifb_fwnode, &efifb_fwnode_ops); pd->dev.fwnode = &efifb_fwnode; } diff --git a/drivers/firmware/sysfb.c b/drivers/firmware/sysfb.c index 889e5b05c739..916b28538a29 100644 --- a/drivers/firmware/sysfb.c +++ b/drivers/firmware/sysfb.c @@ -155,7 +155,7 @@ static __init int sysfb_init(void) if (disabled) goto unlock_mutex; - sysfb_apply_efi_quirks(); + sysfb_apply_efi_quirks(si); parent = sysfb_parent_dev(si); if (IS_ERR(parent)) { @@ -200,7 +200,7 @@ static __init int sysfb_init(void) pd->dev.parent = parent; - sysfb_set_efifb_fwnode(pd); + sysfb_set_efifb_fwnode(si, pd); ret = platform_device_add_data(pd, si, sizeof(*si)); if (ret) diff --git a/drivers/firmware/sysfb_simplefb.c b/drivers/firmware/sysfb_simplefb.c index 592d8a644619..71f542e37732 100644 --- a/drivers/firmware/sysfb_simplefb.c +++ b/drivers/firmware/sysfb_simplefb.c @@ -117,7 +117,7 @@ __init struct platform_device *sysfb_create_simplefb(const struct screen_info *s pd->dev.parent = parent; - sysfb_set_efifb_fwnode(pd); + sysfb_set_efifb_fwnode(si, pd); ret = platform_device_add_resources(pd, &res, 1); if (ret) diff --git a/include/linux/sysfb.h b/include/linux/sysfb.h index b449665c686a..8527a50a5290 100644 --- a/include/linux/sysfb.h +++ b/include/linux/sysfb.h @@ -82,16 +82,17 @@ static inline bool sysfb_handles_screen_info(void) #ifdef CONFIG_EFI extern struct efifb_dmi_info efifb_dmi_list[]; -void sysfb_apply_efi_quirks(void); -void sysfb_set_efifb_fwnode(struct platform_device *pd); +void sysfb_apply_efi_quirks(struct screen_info *si); +void sysfb_set_efifb_fwnode(const struct screen_info *si, struct platform_device *pd); #else /* CONFIG_EFI */ -static inline void sysfb_apply_efi_quirks(void) +static inline void sysfb_apply_efi_quirks(struct screen_info *si) { } -static inline void sysfb_set_efifb_fwnode(struct platform_device *pd) +static inline void sysfb_set_efifb_fwnode(const struct screen_info *si, + struct platform_device *pd) { } -- 2.51.1