From patchwork Tue Sep 12 13:49:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 722326 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E6A3DCA0EDF for ; Tue, 12 Sep 2023 13:50:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234973AbjILNu7 (ORCPT ); Tue, 12 Sep 2023 09:50:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43664 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235035AbjILNu5 (ORCPT ); Tue, 12 Sep 2023 09:50:57 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9A34810D8; Tue, 12 Sep 2023 06:50:53 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 5D2141F45A; Tue, 12 Sep 2023 13:50:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1694526652; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=SaQuO1Trmju0iKDQmxHT4XBB71pRgiPLDhCaXeO65jU=; b=Hos20QQw4ntyf6um4hlBI3ePzarrHK5QKcrU058kAuv/3CS3xHjpDigHoV2xho6xzXq8WB CUMvXpOo+LBN9o/S5TnQJ9pp+uCjbqb00bgZ5orT/1tiaVt9XVqnWH/LbLhpvzfXk/kgSt n0OjVhceDx1oFwBjKVp7rZ+Orj3/nSs= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1694526652; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=SaQuO1Trmju0iKDQmxHT4XBB71pRgiPLDhCaXeO65jU=; b=9OvzmtfYsc+EYGI8dcSL66V7JBn3GEdWq46ch0Xq/UCIM451d8mUf3fyKJOHRlYW1IwlNp 4q52Ol4dOW6i2zDA== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 1D6A2139DB; Tue, 12 Sep 2023 13:50:52 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id SKBmBrxsAGVKQwAAMHmgww (envelope-from ); Tue, 12 Sep 2023 13:50:52 +0000 From: Thomas Zimmermann To: mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, arnd@arndb.de, deller@gmx.de Cc: linuxppc-dev@lists.ozlabs.org, linux-fbdev@vger.kernel.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, sparclinux@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arch@vger.kernel.org, Thomas Zimmermann Subject: [PATCH v4 2/5] fbdev: Replace fb_pgprotect() with pgprot_framebuffer() Date: Tue, 12 Sep 2023 15:49:00 +0200 Message-ID: <20230912135050.17155-3-tzimmermann@suse.de> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230912135050.17155-1-tzimmermann@suse.de> References: <20230912135050.17155-1-tzimmermann@suse.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org Rename the fbdev mmap helper fb_pgprotect() to pgprot_framebuffer(). The helper sets VMA page-access flags for framebuffers in device I/O memory. Also clean up the helper's parameters and return value. Instead of the VMA instance, pass the individial parameters separately: existing page-access flags, the VMAs start and end addresses and the offset in the underlying device memory rsp file. Return the new page-access flags. These changes align pgprot_framebuffer() with other pgprot_() functions. v4: * fix commit message (Christophe) v3: * rename fb_pgprotect() to pgprot_framebuffer() (Arnd) Signed-off-by: Thomas Zimmermann Acked-by: Geert Uytterhoeven --- arch/ia64/include/asm/fb.h | 15 +++++++-------- arch/m68k/include/asm/fb.h | 19 ++++++++++--------- arch/mips/include/asm/fb.h | 11 +++++------ arch/powerpc/include/asm/fb.h | 13 +++++-------- arch/sparc/include/asm/fb.h | 15 +++++++++------ arch/x86/include/asm/fb.h | 10 ++++++---- arch/x86/video/fbdev.c | 15 ++++++++------- drivers/video/fbdev/core/fb_chrdev.c | 3 ++- include/asm-generic/fb.h | 12 ++++++------ 9 files changed, 58 insertions(+), 55 deletions(-) diff --git a/arch/ia64/include/asm/fb.h b/arch/ia64/include/asm/fb.h index 1717b26fd423f..7fce0d5423590 100644 --- a/arch/ia64/include/asm/fb.h +++ b/arch/ia64/include/asm/fb.h @@ -8,17 +8,16 @@ #include -struct file; - -static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma, - unsigned long off) +static inline pgprot_t pgprot_framebuffer(pgprot_t prot, + unsigned long vm_start, unsigned long vm_end, + unsigned long offset) { - if (efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start)) - vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); + if (efi_range_is_wc(vm_start, vm_end - vm_start)) + return pgprot_writecombine(prot); else - vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + return pgprot_noncached(prot); } -#define fb_pgprotect fb_pgprotect +#define pgprot_framebuffer pgprot_framebuffer static inline void fb_memcpy_fromio(void *to, const volatile void __iomem *from, size_t n) { diff --git a/arch/m68k/include/asm/fb.h b/arch/m68k/include/asm/fb.h index 24273fc7ad917..9941b7434b696 100644 --- a/arch/m68k/include/asm/fb.h +++ b/arch/m68k/include/asm/fb.h @@ -5,26 +5,27 @@ #include #include -struct file; - -static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma, - unsigned long off) +static inline pgprot_t pgprot_framebuffer(pgprot_t prot, + unsigned long vm_start, unsigned long vm_end, + unsigned long offset) { #ifdef CONFIG_MMU #ifdef CONFIG_SUN3 - pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE; + pgprot_val(prot) |= SUN3_PAGE_NOCACHE; #else if (CPU_IS_020_OR_030) - pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030; + pgprot_val(prot) |= _PAGE_NOCACHE030; if (CPU_IS_040_OR_060) { - pgprot_val(vma->vm_page_prot) &= _CACHEMASK040; + pgprot_val(prot) &= _CACHEMASK040; /* Use no-cache mode, serialized */ - pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S; + pgprot_val(prot) |= _PAGE_NOCACHE_S; } #endif /* CONFIG_SUN3 */ #endif /* CONFIG_MMU */ + + return prot; } -#define fb_pgprotect fb_pgprotect +#define pgprot_framebuffer pgprot_framebuffer #include diff --git a/arch/mips/include/asm/fb.h b/arch/mips/include/asm/fb.h index 18b7226403bad..d98d6681d64ec 100644 --- a/arch/mips/include/asm/fb.h +++ b/arch/mips/include/asm/fb.h @@ -3,14 +3,13 @@ #include -struct file; - -static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma, - unsigned long off) +static inline pgprot_t pgprot_framebuffer(pgprot_t prot, + unsigned long vm_start, unsigned long vm_end, + unsigned long offset) { - vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + return pgprot_noncached(prot); } -#define fb_pgprotect fb_pgprotect +#define pgprot_framebuffer pgprot_framebuffer /* * MIPS doesn't define __raw_ I/O macros, so the helpers diff --git a/arch/powerpc/include/asm/fb.h b/arch/powerpc/include/asm/fb.h index 61e3b8806db69..3cecf14d51de8 100644 --- a/arch/powerpc/include/asm/fb.h +++ b/arch/powerpc/include/asm/fb.h @@ -2,23 +2,20 @@ #ifndef _ASM_FB_H_ #define _ASM_FB_H_ -#include - #include -static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma, - unsigned long off) +static inline pgprot_t pgprot_framebuffer(pgprot_t prot, + unsigned long vm_start, unsigned long vm_end, + unsigned long offset) { /* * PowerPC's implementation of phys_mem_access_prot() does * not use the file argument. Set it to NULL in preparation * of later updates to the interface. */ - vma->vm_page_prot = phys_mem_access_prot(NULL, PHYS_PFN(off), - vma->vm_end - vma->vm_start, - vma->vm_page_prot); + return phys_mem_access_prot(NULL, PHYS_PFN(offset), vm_end - vm_start, prot); } -#define fb_pgprotect fb_pgprotect +#define pgprot_framebuffer pgprot_framebuffer #include diff --git a/arch/sparc/include/asm/fb.h b/arch/sparc/include/asm/fb.h index 572ecd3e1cc48..24440c0fda490 100644 --- a/arch/sparc/include/asm/fb.h +++ b/arch/sparc/include/asm/fb.h @@ -4,15 +4,18 @@ #include +#include + struct fb_info; -struct file; -struct vm_area_struct; #ifdef CONFIG_SPARC32 -static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma, - unsigned long off) -{ } -#define fb_pgprotect fb_pgprotect +static inline pgprot_t pgprot_framebuffer(pgprot_t prot, + unsigned long vm_start, unsigned long vm_end, + unsigned long offset) +{ + return prot; +} +#define pgprot_framebuffer pgprot_framebuffer #endif int fb_is_primary_device(struct fb_info *info); diff --git a/arch/x86/include/asm/fb.h b/arch/x86/include/asm/fb.h index 23873da8fb77c..c3b9582de7efd 100644 --- a/arch/x86/include/asm/fb.h +++ b/arch/x86/include/asm/fb.h @@ -2,12 +2,14 @@ #ifndef _ASM_X86_FB_H #define _ASM_X86_FB_H +#include + struct fb_info; -struct file; -struct vm_area_struct; -void fb_pgprotect(struct file *file, struct vm_area_struct *vma, unsigned long off); -#define fb_pgprotect fb_pgprotect +pgprot_t pgprot_framebuffer(pgprot_t prot, + unsigned long vm_start, unsigned long vm_end, + unsigned long offset); +#define pgprot_framebuffer pgprot_framebuffer int fb_is_primary_device(struct fb_info *info); #define fb_is_primary_device fb_is_primary_device diff --git a/arch/x86/video/fbdev.c b/arch/x86/video/fbdev.c index 49a0452402e97..1dd6528cc947c 100644 --- a/arch/x86/video/fbdev.c +++ b/arch/x86/video/fbdev.c @@ -13,16 +13,17 @@ #include #include -void fb_pgprotect(struct file *file, struct vm_area_struct *vma, unsigned long off) +pgprot_t pgprot_framebuffer(pgprot_t prot, + unsigned long vm_start, unsigned long vm_end, + unsigned long offset) { - unsigned long prot; - - prot = pgprot_val(vma->vm_page_prot) & ~_PAGE_CACHE_MASK; + pgprot_val(prot) &= ~_PAGE_CACHE_MASK; if (boot_cpu_data.x86 > 3) - pgprot_val(vma->vm_page_prot) = - prot | cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS); + pgprot_val(prot) |= cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS); + + return prot; } -EXPORT_SYMBOL(fb_pgprotect); +EXPORT_SYMBOL(pgprot_framebuffer); int fb_is_primary_device(struct fb_info *info) { diff --git a/drivers/video/fbdev/core/fb_chrdev.c b/drivers/video/fbdev/core/fb_chrdev.c index eadb81f53a821..32a7315b4b6dd 100644 --- a/drivers/video/fbdev/core/fb_chrdev.c +++ b/drivers/video/fbdev/core/fb_chrdev.c @@ -365,7 +365,8 @@ static int fb_mmap(struct file *file, struct vm_area_struct *vma) mutex_unlock(&info->mm_lock); vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); - fb_pgprotect(file, vma, start); + vma->vm_page_prot = pgprot_framebuffer(vma->vm_page_prot, vma->vm_start, + vma->vm_end, start); return vm_iomap_memory(vma, start, len); } diff --git a/include/asm-generic/fb.h b/include/asm-generic/fb.h index bb7ee9c70e603..6ccabb400aa66 100644 --- a/include/asm-generic/fb.h +++ b/include/asm-generic/fb.h @@ -12,14 +12,14 @@ #include struct fb_info; -struct file; -#ifndef fb_pgprotect -#define fb_pgprotect fb_pgprotect -static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma, - unsigned long off) +#ifndef pgprot_framebuffer +#define pgprot_framebuffer pgprot_framebuffer +static inline pgprot_t pgprot_framebuffer(pgprot_t prot, + unsigned long vm_start, unsigned long vm_end, + unsigned long offset) { - vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); + return pgprot_writecombine(prot); } #endif