From patchwork Mon Oct 27 15:09:24 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefano Stabellini X-Patchwork-Id: 5161611 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 47DFEC11AC for ; Mon, 27 Oct 2014 15:17:25 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7F3FB2014A for ; Mon, 27 Oct 2014 15:17:24 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A4FAE201DD for ; Mon, 27 Oct 2014 15:17:23 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Xim0f-0003RA-UD; Mon, 27 Oct 2014 15:15:06 +0000 Received: from smtp.citrix.com ([66.165.176.89]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XilzS-0002Qb-3w for linux-arm-kernel@lists.infradead.org; Mon, 27 Oct 2014 15:13:51 +0000 X-IronPort-AV: E=Sophos;i="5.04,796,1406592000"; d="scan'208";a="185211233" Received: from ukmail1.uk.xensource.com (10.80.16.128) by smtprelay.citrix.com (10.13.107.80) with Microsoft SMTP Server id 14.3.181.6; Mon, 27 Oct 2014 11:12:05 -0400 Received: from kaball.uk.xensource.com ([10.80.2.59]) by ukmail1.uk.xensource.com with esmtp (Exim 4.69) (envelope-from ) id 1Xilxg-0006cI-BO; Mon, 27 Oct 2014 15:12:00 +0000 From: Stefano Stabellini To: Subject: [PATCH v7 4/8] arm: introduce is_device_dma_coherent Date: Mon, 27 Oct 2014 15:09:24 +0000 Message-ID: <1414422568-19103-4-git-send-email-stefano.stabellini@eu.citrix.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: MIME-Version: 1.0 X-DLP: MIA1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20141027_081350_383154_26801529 X-CRM114-Status: UNSURE ( 8.93 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -5.6 (-----) Cc: linux@arm.linux.org.uk, Ian.Campbell@citrix.com, Stefano Stabellini , Catalin Marinas , konrad.wilk@oracle.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, david.vrabel@citrix.com, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, 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 Introduce a boolean flag and an accessor function to check whether a device is dma_coherent. Set the flag from set_arch_dma_coherent_ops. Signed-off-by: Stefano Stabellini Signed-off-by: Catalin Marinas CC: linux@arm.linux.org.uk CC: will.deacon@arm.com --- arch/arm/include/asm/device.h | 1 + arch/arm/include/asm/dma-mapping.h | 6 ++++++ 2 files changed, 7 insertions(+) diff --git a/arch/arm/include/asm/device.h b/arch/arm/include/asm/device.h index dc662fc..4111592 100644 --- a/arch/arm/include/asm/device.h +++ b/arch/arm/include/asm/device.h @@ -17,6 +17,7 @@ struct dev_archdata { #ifdef CONFIG_ARM_DMA_USE_IOMMU struct dma_iommu_mapping *mapping; #endif + bool dma_coherent; }; struct omap_device; diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index 85738b2..8c3b616 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -123,11 +123,17 @@ static inline unsigned long dma_max_pfn(struct device *dev) static inline int set_arch_dma_coherent_ops(struct device *dev) { + dev->archdata.dma_coherent = true; set_dma_ops(dev, &arm_coherent_dma_ops); return 0; } #define set_arch_dma_coherent_ops(dev) set_arch_dma_coherent_ops(dev) +static inline bool is_device_dma_coherent(struct device *dev) +{ + return dev->archdata.dma_coherent; +} + static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) { unsigned int offset = paddr & ~PAGE_MASK;