Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754777AbaJJL4Y (ORCPT ); Fri, 10 Oct 2014 07:56:24 -0400 Received: from smtp.citrix.com ([66.165.176.89]:65433 "EHLO SMTP.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752846AbaJJLyO (ORCPT ); Fri, 10 Oct 2014 07:54:14 -0400 X-IronPort-AV: E=Sophos;i="5.04,691,1406592000"; d="scan'208";a="180114186" From: Stefano Stabellini To: CC: , , , , , , Stefano Stabellini , , , Subject: [PATCH v4 3/7] [RFC] arm/arm64: introduce is_dma_coherent Date: Fri, 10 Oct 2014 12:51:44 +0100 Message-ID: <1412941908-5850-3-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 Content-Type: text/plain X-DLP: MIA1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Introduce a function to check whether a device is dma coherent. Signed-off-by: Stefano Stabellini CC: linux@arm.linux.org.uk CC: catalin.marinas@arm.com CC: will.deacon@arm.com CC: linux-arm-kernel@lists.infradead.org --- arch/arm/include/asm/dma-mapping.h | 6 ++++++ arch/arm64/include/asm/dma-mapping.h | 5 +++++ 2 files changed, 11 insertions(+) diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index c45b61a..bededbb 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -126,6 +126,12 @@ static inline int set_arch_dma_coherent_ops(struct device *dev) set_dma_ops(dev, &arm_coherent_dma_ops); return 0; } + +static inline bool is_dma_coherent(struct device *dev) +{ + return (__generic_dma_ops(dev) == &arm_coherent_dma_ops); +} + #define set_arch_dma_coherent_ops(dev) set_arch_dma_coherent_ops(dev) static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h index dc82e52..d51d67e 100644 --- a/arch/arm64/include/asm/dma-mapping.h +++ b/arch/arm64/include/asm/dma-mapping.h @@ -52,6 +52,11 @@ static inline void set_dma_ops(struct device *dev, struct dma_map_ops *ops) dev->archdata.dma_ops = ops; } +static inline bool is_dma_coherent(struct device *dev) +{ + return (__generic_dma_ops(dev) == &coherent_swiotlb_dma_ops); +} + #include static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/