From patchwork Fri Feb 26 14:02:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Saenz Julienne X-Patchwork-Id: 12106707 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=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 7EFAFC433E0 for ; Fri, 26 Feb 2021 14:05:59 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 39F7A64F04 for ; Fri, 26 Feb 2021 14:05:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 39F7A64F04 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=46YJiUB7olN3CO4uwIfn6sl9RE2wddWtcsnuKsc+Yj0=; b=QEaC9kf1CIDUHScHyXCMD79ip KTRwKWD1mJehQMUwFoi2gHnGjubDSWDJsfzVuOuaFPVIfoIUXL9jYh/dgzGM1RyOHqzEls9vmt+wO L5leoCUIlmAqi1xokuCd4fJLGftOV2BISfh9msfGQ0V9SatANqWJWIu5QFmGz9HQ60/tVbQczk78E imvQWRdXVsrt+/OggltR1xFraG6iPmIsxrgRDi/UOGdnOzLBZe7AcztvE2zHhod0RPe+GOk7UBwzy czWnGJ26DAwCb8u2MqpfLbFZTUco3k5Gs8xFWAB9S1cdEMSeWl4j/p74mV6iZDV6rk/TUa5S78RyT tQcihaF0Q==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1lFdj1-00047X-JU; Fri, 26 Feb 2021 14:04:11 +0000 Received: from mx2.suse.de ([195.135.220.15]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1lFdiF-0003qO-OQ for linux-arm-kernel@lists.infradead.org; Fri, 26 Feb 2021 14:03:33 +0000 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 24D19AF4F; Fri, 26 Feb 2021 14:03:19 +0000 (UTC) From: Nicolas Saenz Julienne To: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC 05/13] pci: Introduce pci_mmio_configure() Date: Fri, 26 Feb 2021 15:02:57 +0100 Message-Id: <20210226140305.26356-6-nsaenzjulienne@suse.de> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210226140305.26356-1-nsaenzjulienne@suse.de> References: <20210226140305.26356-1-nsaenzjulienne@suse.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210226_090324_053650_F1DCEE98 X-CRM114-Status: GOOD ( 15.28 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: f.fainelli@gmail.com, arnd@arndb.de, narmstrong@baylibre.com, dwmw2@infradead.org, linux@armlinux.org.uk, hch@infradead.org, will@kernel.org, robh+dt@kernel.org, catalin.marinas@arm.com, robin.murphy@arm.com, ardb@kernel.org, Nicolas Saenz Julienne Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The function will traverse the pci device's bus hierarchy and set the relevant MMIO access flags. Signed-off-by: Nicolas Saenz Julienne --- drivers/pci/pci-driver.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index ec44a79e951a..554d91e7ec52 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -1596,6 +1596,31 @@ static int pci_dma_configure(struct device *dev) return ret; } +/** + * pci_mmio_configure - Setup MMIO configuration + * @dev: ptr to dev structure + * + * Function to update PCI devices's MMIO configuration using the same + * info from the OF node of host bridge's parent (if any). + */ +static int pci_mmio_configure(struct device *dev) +{ + struct device *bridge; + int ret = 0; + + bridge = pci_get_host_bridge_device(to_pci_dev(dev)); + + dev_info(dev, "MMIO CONFIGURATION\n"); + if (IS_ENABLED(CONFIG_OF) && bridge->parent && + bridge->parent->of_node) { + dev_info(dev, "MMIO CONFIGURATION, %pOF\n", bridge->parent->of_node); + ret = of_mmio_configure(dev, bridge->parent->of_node); + } + + pci_put_host_bridge_device(bridge); + return ret; +} + struct bus_type pci_bus_type = { .name = "pci", .match = pci_bus_match, @@ -1609,6 +1634,7 @@ struct bus_type pci_bus_type = { .pm = PCI_PM_OPS_PTR, .num_vf = pci_bus_num_vf, .dma_configure = pci_dma_configure, + .mmio_configure = pci_mmio_configure, }; EXPORT_SYMBOL(pci_bus_type);