From patchwork Wed May 10 11:05:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 13236795 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 EBDADC7EE2E for ; Wed, 10 May 2023 11:06:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236712AbjEJLGq (ORCPT ); Wed, 10 May 2023 07:06:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34904 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236239AbjEJLGN (ORCPT ); Wed, 10 May 2023 07:06:13 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 661273C1D; Wed, 10 May 2023 04:06:09 -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-out1.suse.de (Postfix) with ESMTPS id C81E92196E; Wed, 10 May 2023 11:06:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1683716767; 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=L3Z0W/8h/vzm79+MFZ3S+00cayEi6igqIR5fXFpBq98=; b=vxnH5X2epzw0GEgW2Th0zcikyNVDCDZcF3b/xv9HeWxPIxhMwJf4VdvdYJbJ8Bkm6HyGy8 HQwveyIcjQrLx44KyFMVEtSBBF/YteRQNWlceBiEa3tW+WhWsKJx25bwtF8qP6KxAViYY/ vvu3/e4dW4GcvCRiTuETY2l7q7LZyyw= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1683716767; 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=L3Z0W/8h/vzm79+MFZ3S+00cayEi6igqIR5fXFpBq98=; b=cXtsAI3CYi2pf0bI1FxwhR3TfdPo1UFimMrnyArtt15PCOV5ipZGEHLHa6wCd6YaXvlmny NffQ8x297/5H2gBQ== 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 67E9F138F0; Wed, 10 May 2023 11:06:07 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id 0LKMGJ96W2QfRAAAMHmgww (envelope-from ); Wed, 10 May 2023 11:06:07 +0000 From: Thomas Zimmermann To: deller@gmx.de, geert@linux-m68k.org, javierm@redhat.com, daniel@ffwll.ch, vgupta@kernel.org, chenhuacai@kernel.org, kernel@xen0n.name, davem@davemloft.net, James.Bottomley@HansenPartnership.com, arnd@arndb.de, sam@ravnborg.org, suijingfeng@loongson.cn Cc: linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arch@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, sparclinux@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-parisc@vger.kernel.org, Thomas Zimmermann Subject: [PATCH v6 5/6] fbdev: Move framebuffer I/O helpers into Date: Wed, 10 May 2023 13:05:56 +0200 Message-Id: <20230510110557.14343-6-tzimmermann@suse.de> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230510110557.14343-1-tzimmermann@suse.de> References: <20230510110557.14343-1-tzimmermann@suse.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org Implement framebuffer I/O helpers, such as fb_read*() and fb_write*(), in the architecture's header file or the generic one. The common case has been the use of regular I/O functions, such as __raw_readb() or memset_io(). A few architectures used plain system- memory reads and writes. Sparc used helpers for its SBus. The architectures that used special cases provide the same code in their __raw_*() I/O helpers. So the patch replaces this code with the __raw_*() functions and moves it to for all architectures. v6: * fix fb_readq()/fb_writeq() on 64-bit mips (kernel test robot) v5: * include in ; fix s390 build v4: * ia64, loongarch, sparc64: add fb_mem*() to arch headers to keep current semantics (Arnd) v3: * implement all architectures with generic helpers * support reordering and native byte order (Geert, Arnd) Signed-off-by: Thomas Zimmermann Tested-by: Sui Jingfeng Reviewed-by: Arnd Bergmann add mips fb_q() --- arch/ia64/include/asm/fb.h | 20 +++++++ arch/loongarch/include/asm/fb.h | 21 +++++++ arch/mips/include/asm/fb.h | 22 +++++++ arch/sparc/include/asm/fb.h | 20 +++++++ include/asm-generic/fb.h | 102 ++++++++++++++++++++++++++++++++ include/linux/fb.h | 53 ----------------- 6 files changed, 185 insertions(+), 53 deletions(-) diff --git a/arch/ia64/include/asm/fb.h b/arch/ia64/include/asm/fb.h index 0208f64a0da0..bcf982043a5c 100644 --- a/arch/ia64/include/asm/fb.h +++ b/arch/ia64/include/asm/fb.h @@ -2,7 +2,9 @@ #ifndef _ASM_FB_H_ #define _ASM_FB_H_ +#include #include +#include #include @@ -18,6 +20,24 @@ static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma, } #define fb_pgprotect fb_pgprotect +static inline void fb_memcpy_fromfb(void *to, const volatile void __iomem *from, size_t n) +{ + memcpy(to, (void __force *)from, n); +} +#define fb_memcpy_fromfb fb_memcpy_fromfb + +static inline void fb_memcpy_tofb(volatile void __iomem *to, const void *from, size_t n) +{ + memcpy((void __force *)to, from, n); +} +#define fb_memcpy_tofb fb_memcpy_tofb + +static inline void fb_memset(volatile void __iomem *addr, int c, size_t n) +{ + memset((void __force *)addr, c, n); +} +#define fb_memset fb_memset + #include #endif /* _ASM_FB_H_ */ diff --git a/arch/loongarch/include/asm/fb.h b/arch/loongarch/include/asm/fb.h index ff82f20685c8..c6fc7ef374a4 100644 --- a/arch/loongarch/include/asm/fb.h +++ b/arch/loongarch/include/asm/fb.h @@ -5,6 +5,27 @@ #ifndef _ASM_FB_H_ #define _ASM_FB_H_ +#include +#include + +static inline void fb_memcpy_fromfb(void *to, const volatile void __iomem *from, size_t n) +{ + memcpy(to, (void __force *)from, n); +} +#define fb_memcpy_fromfb fb_memcpy_fromfb + +static inline void fb_memcpy_tofb(volatile void __iomem *to, const void *from, size_t n) +{ + memcpy((void __force *)to, from, n); +} +#define fb_memcpy_tofb fb_memcpy_tofb + +static inline void fb_memset(volatile void __iomem *addr, int c, size_t n) +{ + memset((void __force *)addr, c, n); +} +#define fb_memset fb_memset + #include #endif /* _ASM_FB_H_ */ diff --git a/arch/mips/include/asm/fb.h b/arch/mips/include/asm/fb.h index 6bda0a81d8ca..18b7226403ba 100644 --- a/arch/mips/include/asm/fb.h +++ b/arch/mips/include/asm/fb.h @@ -12,6 +12,28 @@ static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma, } #define fb_pgprotect fb_pgprotect +/* + * MIPS doesn't define __raw_ I/O macros, so the helpers + * in don't generate fb_readq() and + * fb_write(). We have to provide them here. + * + * TODO: Convert MIPS to generic I/O. The helpers below can + * then be removed. + */ +#ifdef CONFIG_64BIT +static inline u64 fb_readq(const volatile void __iomem *addr) +{ + return __raw_readq(addr); +} +#define fb_readq fb_readq + +static inline void fb_writeq(u64 b, volatile void __iomem *addr) +{ + __raw_writeq(b, addr); +} +#define fb_writeq fb_writeq +#endif + #include #endif /* _ASM_FB_H_ */ diff --git a/arch/sparc/include/asm/fb.h b/arch/sparc/include/asm/fb.h index 689ee5c60054..077da91aeba1 100644 --- a/arch/sparc/include/asm/fb.h +++ b/arch/sparc/include/asm/fb.h @@ -2,6 +2,8 @@ #ifndef _SPARC_FB_H_ #define _SPARC_FB_H_ +#include + struct fb_info; struct file; struct vm_area_struct; @@ -16,6 +18,24 @@ static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma, int fb_is_primary_device(struct fb_info *info); #define fb_is_primary_device fb_is_primary_device +static inline void fb_memcpy_fromfb(void *to, const volatile void __iomem *from, size_t n) +{ + sbus_memcpy_fromio(to, from, n); +} +#define fb_memcpy_fromfb fb_memcpy_fromfb + +static inline void fb_memcpy_tofb(volatile void __iomem *to, const void *from, size_t n) +{ + sbus_memcpy_toio(to, from, n); +} +#define fb_memcpy_tofb fb_memcpy_tofb + +static inline void fb_memset(volatile void __iomem *addr, int c, size_t n) +{ + sbus_memset_io(addr, c, n); +} +#define fb_memset fb_memset + #include #endif /* _SPARC_FB_H_ */ diff --git a/include/asm-generic/fb.h b/include/asm-generic/fb.h index c8af99f5a535..0540eccdbeca 100644 --- a/include/asm-generic/fb.h +++ b/include/asm-generic/fb.h @@ -7,6 +7,7 @@ * Only include this header file from your architecture's . */ +#include #include #include @@ -30,4 +31,105 @@ static inline int fb_is_primary_device(struct fb_info *info) } #endif +/* + * I/O helpers for the framebuffer. Prefer these functions over their + * regular counterparts. The regular I/O functions provide in-order + * access and swap bytes to/from little-endian ordering. Neither is + * required for framebuffers. Instead, the helpers read and write + * raw framebuffer data. Independent operations can be reordered for + * improved performance. + */ + +#ifndef fb_readb +static inline u8 fb_readb(const volatile void __iomem *addr) +{ + return __raw_readb(addr); +} +#define fb_readb fb_readb +#endif + +#ifndef fb_readw +static inline u16 fb_readw(const volatile void __iomem *addr) +{ + return __raw_readw(addr); +} +#define fb_readw fb_readw +#endif + +#ifndef fb_readl +static inline u32 fb_readl(const volatile void __iomem *addr) +{ + return __raw_readl(addr); +} +#define fb_readl fb_readl +#endif + +#ifndef fb_readq +#if defined(__raw_readq) +static inline u64 fb_readq(const volatile void __iomem *addr) +{ + return __raw_readq(addr); +} +#define fb_readq fb_readq +#endif +#endif + +#ifndef fb_writeb +static inline void fb_writeb(u8 b, volatile void __iomem *addr) +{ + __raw_writeb(b, addr); +} +#define fb_writeb fb_writeb +#endif + +#ifndef fb_writew +static inline void fb_writew(u16 b, volatile void __iomem *addr) +{ + __raw_writew(b, addr); +} +#define fb_writew fb_writew +#endif + +#ifndef fb_writel +static inline void fb_writel(u32 b, volatile void __iomem *addr) +{ + __raw_writel(b, addr); +} +#define fb_writel fb_writel +#endif + +#ifndef fb_writeq +#if defined(__raw_writeq) +static inline void fb_writeq(u64 b, volatile void __iomem *addr) +{ + __raw_writeq(b, addr); +} +#define fb_writeq fb_writeq +#endif +#endif + +#ifndef fb_memcpy_fromfb +static inline void fb_memcpy_fromfb(void *to, const volatile void __iomem *from, size_t n) +{ + memcpy_fromio(to, from, n); +} +#define fb_memcpy_fromfb fb_memcpy_fromfb +#endif + +#ifndef fb_memcpy_tofb +static inline void fb_memcpy_tofb(volatile void __iomem *to, const void *from, size_t n) +{ + memcpy_toio(to, from, n); +} +#define fb_memcpy_tofb fb_memcpy_tofb +#endif + +#ifndef fb_memset +static inline void fb_memset(volatile void __iomem *addr, int c, size_t n) +{ + memset_io(addr, c, n); +} +#define fb_memset fb_memset +#endif + #endif /* __ASM_GENERIC_FB_H_ */ diff --git a/include/linux/fb.h b/include/linux/fb.h index 4b4d9a5d200a..2cf8efcb9e32 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -17,7 +17,6 @@ #include #include -#include struct vm_area_struct; struct fb_info; @@ -513,58 +512,6 @@ struct fb_info { */ #define STUPID_ACCELF_TEXT_SHIT -// This will go away -#if defined(__sparc__) - -/* We map all of our framebuffers such that big-endian accesses - * are what we want, so the following is sufficient. - */ - -// This will go away -#define fb_readb sbus_readb -#define fb_readw sbus_readw -#define fb_readl sbus_readl -#define fb_readq sbus_readq -#define fb_writeb sbus_writeb -#define fb_writew sbus_writew -#define fb_writel sbus_writel -#define fb_writeq sbus_writeq -#define fb_memset sbus_memset_io -#define fb_memcpy_fromfb sbus_memcpy_fromio -#define fb_memcpy_tofb sbus_memcpy_toio - -#elif defined(__i386__) || defined(__alpha__) || defined(__x86_64__) || \ - defined(__hppa__) || defined(__sh__) || defined(__powerpc__) || \ - defined(__arm__) || defined(__aarch64__) || defined(__mips__) - -#define fb_readb __raw_readb -#define fb_readw __raw_readw -#define fb_readl __raw_readl -#define fb_readq __raw_readq -#define fb_writeb __raw_writeb -#define fb_writew __raw_writew -#define fb_writel __raw_writel -#define fb_writeq __raw_writeq -#define fb_memset memset_io -#define fb_memcpy_fromfb memcpy_fromio -#define fb_memcpy_tofb memcpy_toio - -#else - -#define fb_readb(addr) (*(volatile u8 *) (addr)) -#define fb_readw(addr) (*(volatile u16 *) (addr)) -#define fb_readl(addr) (*(volatile u32 *) (addr)) -#define fb_readq(addr) (*(volatile u64 *) (addr)) -#define fb_writeb(b,addr) (*(volatile u8 *) (addr) = (b)) -#define fb_writew(b,addr) (*(volatile u16 *) (addr) = (b)) -#define fb_writel(b,addr) (*(volatile u32 *) (addr) = (b)) -#define fb_writeq(b,addr) (*(volatile u64 *) (addr) = (b)) -#define fb_memset memset -#define fb_memcpy_fromfb memcpy -#define fb_memcpy_tofb memcpy - -#endif - #define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0) #define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \ (val) << (bits))