From patchwork Tue May 26 12:49:22 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hanjun Guo X-Patchwork-Id: 6479881 Return-Path: X-Original-To: patchwork-linux-acpi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id CAE65C0020 for ; Tue, 26 May 2015 12:56:00 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 04687205C1 for ; Tue, 26 May 2015 12:56:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 216F5204A7 for ; Tue, 26 May 2015 12:55:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753013AbbEZMxI (ORCPT ); Tue, 26 May 2015 08:53:08 -0400 Received: from mail-pd0-f177.google.com ([209.85.192.177]:33525 "EHLO mail-pd0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753014AbbEZMxD (ORCPT ); Tue, 26 May 2015 08:53:03 -0400 Received: by pdbqa5 with SMTP id qa5so90264046pdb.0 for ; Tue, 26 May 2015 05:50:48 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=Typx6iPnWL16A6mbIRB97zYnY4taarcAtuC6hMrlPBs=; b=Ov7oQdioFNfjVEYnAzD7RBz6b55Es46viUK/gtpiINXvwTVDw77469LhJo+JDKQwrh 5ShgyJTL9zdgONm4xJ0OaeIKAaRQIn0JRGb1XFEfqPc7qTm6/TM+3cMF/YxIrrn8Uz+I HunWHoaZjIPdXunr/0kRU+K9UItq2AO93+/1vLWg46o8T9iBz+x0Wf+jP3FLhshg7Zrk hM7S2LGxSzAeUatA/o2W9WzcDNbna1l2xycsterRC8+cpMc5h9Mjbr8dsSzn1495T7GP fCYob170uhtnbJaud9FzNqe14PJf+FvdDRFsV0BYifYC983dilHMTMcASvq0gIFYX/fS aaCA== X-Gm-Message-State: ALoCoQkY7gJB3eXp4Yy17bBiXalAZZN1CM8Lz8P2wjC/2h8tYtS3fmPPA6JenFSS8FrUPs4epbNO X-Received: by 10.70.43.225 with SMTP id z1mr48253591pdl.45.1432644648854; Tue, 26 May 2015 05:50:48 -0700 (PDT) Received: from localhost ([180.150.153.56]) by mx.google.com with ESMTPSA id u8sm13054058pdj.46.2015.05.26.05.50.47 (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Tue, 26 May 2015 05:50:47 -0700 (PDT) From: Hanjun Guo To: Bjorn Helgaas , Arnd Bergmann , Catalin Marinas , Will Deacon , "Rafael J. Wysocki" Cc: Jiang Liu , Liviu Dudau , Thomas Gleixner , Yijing Wang , Lorenzo Pieralisi , Tomasz Nowicki , Suravee Suthikulpanit , Mark Salter , linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linaro-acpi@lists.linaro.org, Hanjun Guo Subject: [PATCH 09/11] pci, acpi, mcfg: Share ACPI PCI config space accessors. Date: Tue, 26 May 2015 20:49:22 +0800 Message-Id: <1432644564-24746-10-git-send-email-hanjun.guo@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1432644564-24746-1-git-send-email-hanjun.guo@linaro.org> References: <1432644564-24746-1-git-send-email-hanjun.guo@linaro.org> Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Tomasz Nowicki MCFG can be used perfectly for all architectures which support ACPI. ACPI mandates MCFG to describe PCI config space ranges which means we should use MMCONFIG accessors by default. Signed-off-by: Tomasz Nowicki Signed-off-by: Hanjun Guo Tested-by: Suravee Suthikulpanit --- drivers/acpi/mcfg.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/acpi/mcfg.c b/drivers/acpi/mcfg.c index 745b83e..90c81fa 100644 --- a/drivers/acpi/mcfg.c +++ b/drivers/acpi/mcfg.c @@ -12,6 +12,26 @@ #define PREFIX "MCFG: " +/* + * raw_pci_read/write - ACPI PCI config space accessors. + * + * ACPI spec defines MCFG table as the way we can describe access to PCI config + * space, so let MCFG be default (__weak). + * + * If platform needs more fancy stuff, should provides its own implementation. + */ +int __weak raw_pci_read(unsigned int domain, unsigned int bus, + unsigned int devfn, int reg, int len, u32 *val) +{ + return pci_mmcfg_read(domain, bus, devfn, reg, len, val); +} + +int __weak raw_pci_write(unsigned int domain, unsigned int bus, + unsigned int devfn, int reg, int len, u32 val) +{ + return pci_mmcfg_write(domain, bus, devfn, reg, len, val); +} + int __init acpi_parse_mcfg(struct acpi_table_header *header) { struct acpi_table_mcfg *mcfg;