From patchwork Sun Jul 17 03:34:53 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stafford Horne X-Patchwork-Id: 12920406 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9AEA7C43334 for ; Sun, 17 Jul 2022 03:35:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=InEY6GaCmu9nxIQO5I4NvsEFlbN1EMgFZLzifFgoq50=; b=s+nD4Q+Py1ukng erVI2DLeBbalIiUKFHk1UfDh+nTSshAvPzN/Q2EWyaIxTi7XP5mYrLVI4YMQ02PcEUg0wFrhF0Ds2 FmXFhNeT/yMhblzN4jTFp+MeT655W41I6FDQsSySLadXIslutKWDhQ2Xeg+2CvFikNenut3QnR30I 1rCtzSmXQno5M7vgvXWURyyJ3f5QIWv91y+rnBOGglQsfCvVdcZX2qRGPbKMbJb1xd2pKD/H7nySo LzWoK+XsXvzvR9ocFn8KpdKtFOC+IU8z4yQ7aPCwWO62Vr7pi5QDaqeQndcbapjN5dxIuX8+j2Upk mr4f8pVkBFxqsULNpNUw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oCv47-003ElL-BV; Sun, 17 Jul 2022 03:35:31 +0000 Received: from mail-pf1-x431.google.com ([2607:f8b0:4864:20::431]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oCv3u-003EOy-Vi; Sun, 17 Jul 2022 03:35:20 +0000 Received: by mail-pf1-x431.google.com with SMTP id y141so7936204pfb.7; Sat, 16 Jul 2022 20:35:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Xv2PvDmoyOL9LB+6uvx+zPygvIwvBJhKrGc5MQCkb40=; b=ZWVQHPWoRcjOaDC1WJd99IHoPIdfuDS5WO0w6MPg3RfLuHAN49GW4jC9rGrvMm+XFv jifUaIssay+7+Wc66UNuSO4F2Q+tAtuPVxkKx+tIxrmRHDIdjSlEk9oqyJXpN7jW4xYo lhra752D95aaAQDco7zsWBQUJ0eGdbJpfsYrs7/wioQLCKUVEmwytfZAhy9x0jEiXsXO iy6hYeYPGwXXeQm3Yxi0jfA0yNX2B88vCUClPG648+QSoCX/SAebiBX3lCD9n+eNUIkm FFUW7z6jbXlYFMkaykePVPgnRMczSPDT4W85HCUGK8R/Ei4+BqRkg5l32zScIpZ1Aprp +bYA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Xv2PvDmoyOL9LB+6uvx+zPygvIwvBJhKrGc5MQCkb40=; b=1aqiF8tlBECLVu03sPs60gSXr3FdMxPPx1LydwVFf5RmunxgYohGaxSjVt4pOK8R5W WxVUAm3GwJz+jUqgVPAwQlhG2ouDdeLQMp/J2swJEf6OVuVSAuQG/+TE9WHOWeK6704U ikmNDrl89b5erITaBjQVWc4nPQN13xkxszDX9CZ2oXamdcifqJWWbcvoBOU/8jgtpkp9 sbrg2txa0AAic703c4gtvp4mkqvjikE0SRiYcQRgrQUIkOdYXqnP2j84xs38Wnhxs1fl gZW7IjMjdwZcwqKp6Fm299kMQCei3pGlXhlC7WArI5pgGvJVSylqcKDOiCD1OQ3X360N MH8w== X-Gm-Message-State: AJIora+pxNtxMRMR434iURuRxAzgMcZmEr1HkXxGDhvWwSdFrpTnk6dV zn+Jn8BQnIJUBWx9BtgUrus= X-Google-Smtp-Source: AGRyM1v2om8t0UM8MyVaid0Ngu+307Bu4Jr6afHyZaBkUkJHozBAsL+a+jvIFpzs5xOBn/jDmVm1FQ== X-Received: by 2002:a63:210:0:b0:419:c604:2c2b with SMTP id 16-20020a630210000000b00419c6042c2bmr12673684pgc.190.1658028918439; Sat, 16 Jul 2022 20:35:18 -0700 (PDT) Received: from localhost ([2409:10:24a0:4700:e8ad:216a:2a9d:6d0c]) by smtp.gmail.com with ESMTPSA id x6-20020a170902ec8600b0016bedb7ed1esm6421111plg.116.2022.07.16.20.35.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 16 Jul 2022 20:35:18 -0700 (PDT) From: Stafford Horne To: LKML Cc: Arnd Bergmann , Stafford Horne , Catalin Marinas , Will Deacon , Guo Ren , Paul Walmsley , Palmer Dabbelt , Albert Ou , Richard Weinberger , Anton Ivanov , Johannes Berg , Bjorn Helgaas , linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-riscv@lists.infradead.org, linux-um@lists.infradead.org, linux-pci@vger.kernel.org, linux-arch@vger.kernel.org Subject: [PATCH v2 2/2] asm-generic: Add new pci.h and use it Date: Sun, 17 Jul 2022 12:34:53 +0900 Message-Id: <20220717033453.2896843-3-shorne@gmail.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220717033453.2896843-1-shorne@gmail.com> References: <20220717033453.2896843-1-shorne@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220716_203519_040866_87BB1593 X-CRM114-Status: GOOD ( 18.88 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org The asm/pci.h used for many newer architectures share similar definitions. Move the common parts to asm-generic/pci.h to allow for sharing code. Two things to note are: - isa_dma_bridge_buggy, traditionally this is defined in asm/dma.h but these architectures avoid creating that file and add the definition to asm/pci.h. - ARCH_GENERIC_PCI_MMAP_RESOURCE, csky does not define this so we undefine it after including asm-generic/pci.h. Why doesn't csky define it? - pci_get_legacy_ide_irq, This function is only used on architectures that support PNP. It is only maintained for arm64, in other architectures it is removed. Suggested-by: Arnd Bergmann Link: https://lore.kernel.org/lkml/CAK8P3a0JmPeczfmMBE__vn=Jbvf=nkbpVaZCycyv40pZNCJJXQ@mail.gmail.com/ Signed-off-by: Stafford Horne --- arch/arm64/include/asm/pci.h | 12 +++--------- arch/csky/include/asm/pci.h | 24 ++++-------------------- arch/riscv/include/asm/pci.h | 25 +++---------------------- arch/um/include/asm/pci.h | 24 ++---------------------- include/asm-generic/pci.h | 36 ++++++++++++++++++++++++++++++++++++ 5 files changed, 48 insertions(+), 73 deletions(-) create mode 100644 include/asm-generic/pci.h diff --git a/arch/arm64/include/asm/pci.h b/arch/arm64/include/asm/pci.h index b33ca260e3c9..1180e83712f5 100644 --- a/arch/arm64/include/asm/pci.h +++ b/arch/arm64/include/asm/pci.h @@ -9,7 +9,6 @@ #include #define PCIBIOS_MIN_IO 0x1000 -#define PCIBIOS_MIN_MEM 0 /* * Set to 1 if the kernel should re-assign all PCI bus numbers @@ -18,9 +17,6 @@ (pci_has_flag(PCI_REASSIGN_ALL_BUS)) #define arch_can_pci_mmap_wc() 1 -#define ARCH_GENERIC_PCI_MMAP_RESOURCE 1 - -extern int isa_dma_bridge_buggy; #ifdef CONFIG_PCI static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) @@ -28,11 +24,9 @@ static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) /* no legacy IRQ on arm64 */ return -ENODEV; } - -static inline int pci_proc_domain(struct pci_bus *bus) -{ - return 1; -} #endif /* CONFIG_PCI */ +/* Generic PCI */ +#include + #endif /* __ASM_PCI_H */ diff --git a/arch/csky/include/asm/pci.h b/arch/csky/include/asm/pci.h index ebc765b1f78b..44866c1ad461 100644 --- a/arch/csky/include/asm/pci.h +++ b/arch/csky/include/asm/pci.h @@ -9,26 +9,10 @@ #include -#define PCIBIOS_MIN_IO 0 -#define PCIBIOS_MIN_MEM 0 +/* Generic PCI */ +#include -/* C-SKY shim does not initialize PCI bus */ -#define pcibios_assign_all_busses() 1 - -extern int isa_dma_bridge_buggy; - -#ifdef CONFIG_PCI -static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) -{ - /* no legacy IRQ on csky */ - return -ENODEV; -} - -static inline int pci_proc_domain(struct pci_bus *bus) -{ - /* always show the domain in /proc */ - return 1; -} -#endif /* CONFIG_PCI */ +/* csky doesn't use generic pci resource mapping */ +#undef ARCH_GENERIC_PCI_MMAP_RESOURCE #endif /* __ASM_CSKY_PCI_H */ diff --git a/arch/riscv/include/asm/pci.h b/arch/riscv/include/asm/pci.h index 7fd52a30e605..12ce8150cfb0 100644 --- a/arch/riscv/include/asm/pci.h +++ b/arch/riscv/include/asm/pci.h @@ -12,29 +12,7 @@ #include -#define PCIBIOS_MIN_IO 0 -#define PCIBIOS_MIN_MEM 0 - -/* RISC-V shim does not initialize PCI bus */ -#define pcibios_assign_all_busses() 1 - -#define ARCH_GENERIC_PCI_MMAP_RESOURCE 1 - -extern int isa_dma_bridge_buggy; - #ifdef CONFIG_PCI -static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) -{ - /* no legacy IRQ on risc-v */ - return -ENODEV; -} - -static inline int pci_proc_domain(struct pci_bus *bus) -{ - /* always show the domain in /proc */ - return 1; -} - #ifdef CONFIG_NUMA static inline int pcibus_to_node(struct pci_bus *bus) @@ -50,4 +28,7 @@ static inline int pcibus_to_node(struct pci_bus *bus) #endif /* CONFIG_PCI */ +/* Generic PCI */ +#include + #endif /* _ASM_RISCV_PCI_H */ diff --git a/arch/um/include/asm/pci.h b/arch/um/include/asm/pci.h index da13fd5519ef..34fe4921b5fa 100644 --- a/arch/um/include/asm/pci.h +++ b/arch/um/include/asm/pci.h @@ -4,28 +4,8 @@ #include #include -#define PCIBIOS_MIN_IO 0 -#define PCIBIOS_MIN_MEM 0 - -#define pcibios_assign_all_busses() 1 - -extern int isa_dma_bridge_buggy; - -#ifdef CONFIG_PCI -static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) -{ - /* no legacy IRQs */ - return -ENODEV; -} -#endif - -#ifdef CONFIG_PCI_DOMAINS -static inline int pci_proc_domain(struct pci_bus *bus) -{ - /* always show the domain in /proc */ - return 1; -} -#endif /* CONFIG_PCI */ +/* Generic PCI */ +#include #ifdef CONFIG_PCI_MSI_IRQ_DOMAIN /* diff --git a/include/asm-generic/pci.h b/include/asm-generic/pci.h new file mode 100644 index 000000000000..fbc25741696a --- /dev/null +++ b/include/asm-generic/pci.h @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef __ASM_GENERIC_PCI_H +#define __ASM_GENERIC_PCI_H + +#include + +#ifndef PCIBIOS_MIN_IO +#define PCIBIOS_MIN_IO 0 +#endif + +#ifndef PCIBIOS_MIN_MEM +#define PCIBIOS_MIN_MEM 0 +#endif + +#ifndef pcibios_assign_all_busses +/* For bootloaders that do not initialize the PCI bus */ +#define pcibios_assign_all_busses() 1 +#endif + +extern int isa_dma_bridge_buggy; + +/* Enable generic resource mapping code in drivers/pci/ */ +#define ARCH_GENERIC_PCI_MMAP_RESOURCE + +#ifdef CONFIG_PCI + +static inline int pci_proc_domain(struct pci_bus *bus) +{ + /* always show the domain in /proc */ + return 1; +} + +#endif /* CONFIG_PCI */ + +#endif /* __ASM_GENERIC_PCI_H */