From mboxrd@z Thu Jan 1 00:00:00 1970 From: stefano.stabellini@eu.citrix.com (Stefano Stabellini) Date: Mon, 27 Oct 2014 15:09:23 +0000 Subject: [PATCH v7 3/8] arm64: introduce is_device_dma_coherent In-Reply-To: References: Message-ID: <1414422568-19103-3-git-send-email-stefano.stabellini@eu.citrix.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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: will.deacon at arm.com --- arch/arm64/include/asm/device.h | 1 + arch/arm64/include/asm/dma-mapping.h | 6 ++++++ 2 files changed, 7 insertions(+) diff --git a/arch/arm64/include/asm/device.h b/arch/arm64/include/asm/device.h index cf98b36..243ef25 100644 --- a/arch/arm64/include/asm/device.h +++ b/arch/arm64/include/asm/device.h @@ -21,6 +21,7 @@ struct dev_archdata { #ifdef CONFIG_IOMMU_API void *iommu; /* private IOMMU data */ #endif + bool dma_coherent; }; struct pdev_archdata { diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h index adeae3f..e213dc4 100644 --- a/arch/arm64/include/asm/dma-mapping.h +++ b/arch/arm64/include/asm/dma-mapping.h @@ -54,11 +54,17 @@ static inline void set_dma_ops(struct device *dev, struct dma_map_ops *ops) static inline int set_arch_dma_coherent_ops(struct device *dev) { + dev->archdata.dma_coherent = true; set_dma_ops(dev, &coherent_swiotlb_dma_ops); return 0; } #define set_arch_dma_coherent_ops set_arch_dma_coherent_ops +static inline bool is_device_dma_coherent(struct device *dev) +{ + return dev->archdata.dma_coherent; +} + #include static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) -- 1.7.10.4