From patchwork Fri Apr 28 09:27:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 678087 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 58C89C7EE29 for ; Fri, 28 Apr 2023 09:27:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345675AbjD1J1X (ORCPT ); Fri, 28 Apr 2023 05:27:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48830 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345592AbjD1J1S (ORCPT ); Fri, 28 Apr 2023 05:27:18 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [IPv6:2001:67c:2178:6::1d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C74944496; Fri, 28 Apr 2023 02:27:16 -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 580052002E; Fri, 28 Apr 2023 09:27:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1682674035; 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=5VYWy/AvbpTwYMUvgq/Qf7JvO1LdK29uHbuVPQM8w+I=; b=GVDAylSdFB2aC8MzuHMzQQpnFsJO4b+FYu4OUDiHDHTyD+mATNULQ82rwHCWtJJ2n7oa4O wmtSxgAGOys9EGQlQlyGj32QskSRu6EmzTrpvbR8TcTaUiGEWxITGrBNjm9U13oGsvKd9E L3rjOzqF3CBsko70lonU/BQKqTYWGMo= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1682674035; 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=5VYWy/AvbpTwYMUvgq/Qf7JvO1LdK29uHbuVPQM8w+I=; b=OVW7mKvhPqZ91zi25yBTo9BJR5O4Kqqzh5IohkbwFTzfRAquwndXbRpfe1BoyZ0d8UJeDt 2gGjf0nPmiJngkBg== 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 EE31E139C3; Fri, 28 Apr 2023 09:27:14 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id 0HViOXKRS2ReFwAAMHmgww (envelope-from ); Fri, 28 Apr 2023 09:27:14 +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 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 v2 5/5] fbdev: Define framebuffer I/O from Linux' I/O functions Date: Fri, 28 Apr 2023 11:27:11 +0200 Message-Id: <20230428092711.406-6-tzimmermann@suse.de> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230428092711.406-1-tzimmermann@suse.de> References: <20230428092711.406-1-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*() with Linux' regular I/O functions. Remove all ifdef cases for the various architectures. Most of the supported architectures use __raw_() I/O functions or treat framebuffer memory like regular memory. This is also implemented by the architectures' I/O function, so we can use them instead. Sparc uses SBus to connect to framebuffer devices. It provides respective implementations of the framebuffer I/O helpers. The involved sbus_() I/O helpers map to the same code as Sparc's regular I/O functions. As with other platforms, we can use those instead. We leave a TODO item to replace all fb_() functions with their regular I/O counterparts throughout the fbdev drivers. Signed-off-by: Thomas Zimmermann --- include/linux/fb.h | 63 +++++++++++----------------------------------- 1 file changed, 15 insertions(+), 48 deletions(-) diff --git a/include/linux/fb.h b/include/linux/fb.h index 08cb47da71f8..4aa9e90edd17 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -15,7 +15,6 @@ #include #include #include -#include struct vm_area_struct; struct fb_info; @@ -511,58 +510,26 @@ 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. +/* + * TODO: Update fbdev drivers to call the I/O helpers directly and + * remove the fb_() tokens. */ - -// 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_readb readb +#define fb_readw readw +#define fb_readl readl +#if defined(CONFIG_64BIT) +#define fb_readq readq +#endif +#define fb_writeb writeb +#define fb_writew writew +#define fb_writel writel +#if defined(CONFIG_64BIT) +#define fb_writeq writeq +#endif #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))