From patchwork Fri Feb 26 14:02:58 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: 12106699 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 6AF67C433E9 for ; Fri, 26 Feb 2021 14:05:29 +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 1D05F64EF6 for ; Fri, 26 Feb 2021 14:05:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1D05F64EF6 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=FLGpqI0rvOtTDy1iwK8AKO2i6bVzleJ9RqfkNwm01ZI=; b=Qm8MgspVsQEdtNIGoZsqeZblT 4eLlP0TB3S8Pxnxs74YEAGw+BU3Z+FSYcQw0697VtEhVRrGLNpinsve5W7Az5VFCDLCfGn86mFXqT 3UksSWsJq3BW+SnYSS1dFFaQUzr/GzZj86+PvSsIu6JHJ3dGQ/vvAWuLlKYLIXQ0OWDpkInKBvINR zvwHeuqYsVdSji+PdsMfukp8G9m3DZxSfj7vnKymtq+t3cgjgRTIJsksoQqsq3B5nYNdLYSFVtZfm FnRrO7JuJ/ogoFXJ4Lzu2loY2S6RirwEaqeUGEF4vt8q1Cp+4pOotgnilz+434hMZaQ1liXWE/Nqa UisNl6kvQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1lFdij-000413-HT; Fri, 26 Feb 2021 14:03:53 +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-0003qP-OU for linux-arm-kernel@lists.infradead.org; Fri, 26 Feb 2021 14:03:30 +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 C7C26AE07; 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 06/13] device core: Introduce dev_64bit_mmio_supported() Date: Fri, 26 Feb 2021 15:02:58 +0100 Message-Id: <20210226140305.26356-7-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_054828_FA3BBF94 X-CRM114-Status: GOOD ( 11.83 ) 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 This helper function will be help drivers ascertain whether they can use 64-bit memory accesses. Signed-off-by: Nicolas Saenz Julienne --- include/linux/device.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/include/linux/device.h b/include/linux/device.h index bd94aa0cbd72..e9b4b2f99a44 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -826,6 +826,23 @@ static inline int dev_num_vf(struct device *dev) return 0; } +#if defined(CONFIG_ARCH_HAS_64BIT_MMIO_BROKEN) +static inline bool dev_64bit_mmio_supported(struct device *dev) +{ + return !dev->mmio_64bit_broken; +} +#elif defined(CONFIG_64BIT) +static inline bool dev_64bit_mmio_supported(struct device *dev) +{ + return true; +} +#else +static inline bool dev_64bit_mmio_supported(struct device *dev) +{ + return false; +} +#endif + /* * Root device objects for grouping under /sys/devices */