From patchwork Mon Jul 18 00:41:14 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stafford Horne X-Patchwork-Id: 12920688 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 C3282C43334 for ; Mon, 18 Jul 2022 00:42:02 +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=vjb7L4xI2XojfHBoe7Xc6mtd7rtLk7HBhNcAbq9kU6o=; b=AyyyOktbWE3N6B eXu3x5MIeqS6/6kwjubDnK6klE9+6qv5O9GQHNsXiAGgj2/gcFSXoviTF4mXTJWHU7vKCckDxRFMU TBzdUSWu/EXsHeoC8W8jQGZe7g2tiHB2mkRAN/Ug5vPKYWeVnF2BND0nnHb58w3hZD3cdFi+jQ9Bu ouodb0vMnI15acX5cmuQa/mgqBMbor8ZQvN67YrmbZC4rVLk+1S2l99qOFCIISO/dBjma5oYJIXaI gH0oDMjCCFdEwnLL9wsubbSpMxCY7QAYh1aFJR2x9M8rLnSX9mgvOMx2BmaxSO6ZmmJVtERYOHYI7 sdt/mJs5pu9ZgVNw0cTw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oDEpc-009Zwx-DI; Mon, 18 Jul 2022 00:41:52 +0000 Received: from mail-pj1-x1035.google.com ([2607:f8b0:4864:20::1035]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oDEpR-009Zsa-5F; Mon, 18 Jul 2022 00:41:42 +0000 Received: by mail-pj1-x1035.google.com with SMTP id p9so10316437pjd.3; Sun, 17 Jul 2022 17:41:41 -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=3/j8pkL4GhZFNzH7umuUIdRtKiBGR7GCptRdPC+dKyo=; b=mxxOvkVdOgvJZHtszW+vBywxcbxqCt8yBEVBIXyw0Sb5IHo41kP2y4mbEM6iuIky7e 99o5F1aRk2K46vS050Y9HMgECRAR7E5fjenJW0os/DNAkxSHbQ1JXQ+oEOeARl5/Gh47 B8KET01bHEOWGJTEfhz8+gBRDl0BIK/UxLhIrPc8BX4313l2khy/XPM7gL6ZDKjXxFCH JXiGTJPKZuuL5Y/VZo+ImX98I6yYXxX2z2al7FMbRFePiNlzXb5cpdFbT5VvImcPQXBh icWcCGnPmSev3VrXJdL8r2gDyS2Z+iIBAPlzOhYAHyhyMZO+9gRkIkiT0QyZvi5mp0jY BGmA== 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=3/j8pkL4GhZFNzH7umuUIdRtKiBGR7GCptRdPC+dKyo=; b=XvWg0HPTd0Td9yyqqlW+dk2Y5+c2XS8BaFo4V+nQCOySVhfNzsW3r/fl/8SkZZzNzz psfeXHsYmRAHep5EVr80/gNIKmoBl4dZHMcrm53w5LBbjNyebPo9gSjqkgKzNBTDQxto Dt6cuUwKtIQYqmBRYYSs0tCRes5l2wNIT5Gydj2vl138v2RYDynoYjGpWQ0FxIwCNiQZ x/MmDQMo2rNzuxAm2UBe8LP8gZCjeM2+yW/8i0XAzM3rjF8WeHarSB1bz3o/C3cetEih a/n4/YQ5zTqQHQol7J56tSyhmyGJN19+Psh71ZhAJ62z7SA2Ta3W67zOQbxB2GFLdi4n C1fA== X-Gm-Message-State: AJIora+w0XgY6FfHgST6kJLSshyJtLs9d+B03gneGR7VZxj7by4pOyAj y0VapGvfs0pEYvYGIkx2wTI= X-Google-Smtp-Source: AGRyM1vCAUUHTWRBklXTSrWrJjydvmb9dcRO36hitYo0pHJBlzKJ2UIFHkGtyl/dT4bicXDMWpKT3g== X-Received: by 2002:a17:90b:1004:b0:1ef:9f33:2df4 with SMTP id gm4-20020a17090b100400b001ef9f332df4mr35956491pjb.31.1658104900584; Sun, 17 Jul 2022 17:41:40 -0700 (PDT) Received: from localhost ([2409:10:24a0:4700:e8ad:216a:2a9d:6d0c]) by smtp.gmail.com with ESMTPSA id ij8-20020a170902ab4800b0016c066e566bsm7822396plb.164.2022.07.17.17.41.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 17 Jul 2022 17:41:40 -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 v3 2/2] asm-generic: Add new pci.h and use it Date: Mon, 18 Jul 2022 09:41:14 +0900 Message-Id: <20220718004114.3925745-3-shorne@gmail.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220718004114.3925745-1-shorne@gmail.com> References: <20220718004114.3925745-1-shorne@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220717_174141_229494_4B97DF8F X-CRM114-Status: GOOD ( 22.53 ) 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 --- Second note on isa_dma_bridge_buggy, this is set on x86 but it it also set in pci/quirks.c. We discussed limiting it only to x86 though as its a general quick triggered by pci ids I think it will be more tricky than we thought so I will leave as is. It might be nice to move it out of asm/dma.h and into asm/pci.h though. Since v2: - Nothing Since v1: - Remove definition of pci_get_legacy_ide_irq 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 */