From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 013ECC10DCE for ; Wed, 18 Mar 2020 16:01:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D103A2076D for ; Wed, 18 Mar 2020 16:01:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727152AbgCRQBH (ORCPT ); Wed, 18 Mar 2020 12:01:07 -0400 Received: from szxga07-in.huawei.com ([45.249.212.35]:52544 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726817AbgCRQBH (ORCPT ); Wed, 18 Mar 2020 12:01:07 -0400 Received: from DGGEMS408-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id 74B381DFBFC724B5E42D; Wed, 18 Mar 2020 23:59:49 +0800 (CST) Received: from localhost.localdomain (10.69.192.58) by DGGEMS408-HUB.china.huawei.com (10.3.19.208) with Microsoft SMTP Server id 14.3.487.0; Wed, 18 Mar 2020 23:59:39 +0800 From: John Garry To: , CC: , , , , , , , , "John Garry" Subject: [PATCH 1/3] io: Provide _inX() and _outX() Date: Wed, 18 Mar 2020 23:55:33 +0800 Message-ID: <1584546935-75393-2-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1584546935-75393-1-git-send-email-john.garry@huawei.com> References: <1584546935-75393-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.69.192.58] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Since commit a7851aa54c0c ("io: change outX() to have their own IO barrier overrides") and commit 87fe2d543f81 ("io: change inX() to have their own IO barrier overrides"), the outX and inX functions have memory barriers which can be overridden. However, the generic logic_pio lib has continued to use readl/writel et al for IO port accesses, which has weaker barriers on arm64. Provide generic _inX() and _outX(), which can be used by logic pio. Signed-off-by: John Garry --- include/asm-generic/io.h | 64 +++++++++++++++++++++++++++++++++--------------- 1 file changed, 44 insertions(+), 20 deletions(-) diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h index d39ac997dda8..31f647389c84 100644 --- a/include/asm-generic/io.h +++ b/include/asm-generic/io.h @@ -448,17 +448,15 @@ static inline void writesq(volatile void __iomem *addr, const void *buffer, #define IO_SPACE_LIMIT 0xffff #endif -#include - /* * {in,out}{b,w,l}() access little endian I/O. {in,out}{b,w,l}_p() can be * implemented on hardware that needs an additional delay for I/O accesses to * take effect. */ -#ifndef inb -#define inb inb -static inline u8 inb(unsigned long addr) +#ifndef _inb +#define _inb _inb +static inline u16 _inb(unsigned long addr) { u8 val; @@ -469,9 +467,9 @@ static inline u8 inb(unsigned long addr) } #endif -#ifndef inw -#define inw inw -static inline u16 inw(unsigned long addr) +#ifndef _inw +#define _inw _inw +static inline u16 _inw(unsigned long addr) { u16 val; @@ -482,9 +480,9 @@ static inline u16 inw(unsigned long addr) } #endif -#ifndef inl -#define inl inl -static inline u32 inl(unsigned long addr) +#ifndef _inl +#define _inl _inl +static inline u16 _inl(unsigned long addr) { u32 val; @@ -495,9 +493,9 @@ static inline u32 inl(unsigned long addr) } #endif -#ifndef outb -#define outb outb -static inline void outb(u8 value, unsigned long addr) +#ifndef _outb +#define _outb _outb +static inline void _outb(u8 value, unsigned long addr) { __io_pbw(); __raw_writeb(value, PCI_IOBASE + addr); @@ -505,9 +503,9 @@ static inline void outb(u8 value, unsigned long addr) } #endif -#ifndef outw -#define outw outw -static inline void outw(u16 value, unsigned long addr) +#ifndef _outw +#define _outw _outw +static inline void _outw(u16 value, unsigned long addr) { __io_pbw(); __raw_writew(cpu_to_le16(value), PCI_IOBASE + addr); @@ -515,9 +513,9 @@ static inline void outw(u16 value, unsigned long addr) } #endif -#ifndef outl -#define outl outl -static inline void outl(u32 value, unsigned long addr) +#ifndef _outl +#define _outl _outl +static inline void _outl(u32 value, unsigned long addr) { __io_pbw(); __raw_writel(cpu_to_le32(value), PCI_IOBASE + addr); @@ -525,6 +523,32 @@ static inline void outl(u32 value, unsigned long addr) } #endif +#include + +#ifndef inb +#define inb _inb +#endif + +#ifndef inw +#define inw _inw +#endif + +#ifndef inl +#define inl _inl +#endif + +#ifndef outb +#define outb _outb +#endif + +#ifndef outw +#define outw _outw +#endif + +#ifndef outl +#define outl _outl +#endif + #ifndef inb_p #define inb_p inb_p static inline u8 inb_p(unsigned long addr) -- 2.12.3