From 3d5391ac6f5e3cb1ab01e23851140d3f6e9ab573 Mon Sep 17 00:00:00 2001 From: Stefano Stabellini Date: Thu, 20 Nov 2014 10:41:40 +0000 Subject: [PATCH] arm: introduce is_device_dma_coherent 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 Reviewed-by: Catalin Marinas Acked-by: Russell King --- arch/arm/include/asm/device.h | 1 + arch/arm/include/asm/dma-mapping.h | 7 +++++++ 2 files changed, 8 insertions(+) diff --git a/arch/arm/include/asm/device.h b/arch/arm/include/asm/device.h index dc662fca9230..4111592f0130 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 85738b200023..e6e3446abdf6 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -123,11 +123,18 @@ 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) +/* do not use this function in a driver */ +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;