diff options
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/device.h | 3 | ||||
| -rw-r--r-- | arch/arm/include/asm/dma-iommu.h | 34 |
2 files changed, 37 insertions, 0 deletions
diff --git a/arch/arm/include/asm/device.h b/arch/arm/include/asm/device.h index 6e2cb0e..b69c0d3 100644 --- a/arch/arm/include/asm/device.h +++ b/arch/arm/include/asm/device.h @@ -14,6 +14,9 @@ struct dev_archdata { #ifdef CONFIG_IOMMU_API void *iommu; /* private IOMMU data */ #endif +#ifdef CONFIG_ARM_DMA_USE_IOMMU + struct dma_iommu_mapping *mapping; +#endif }; struct omap_device; diff --git a/arch/arm/include/asm/dma-iommu.h b/arch/arm/include/asm/dma-iommu.h new file mode 100644 index 0000000..799b094 --- /dev/null +++ b/arch/arm/include/asm/dma-iommu.h @@ -0,0 +1,34 @@ +#ifndef ASMARM_DMA_IOMMU_H +#define ASMARM_DMA_IOMMU_H + +#ifdef __KERNEL__ + +#include <linux/mm_types.h> +#include <linux/scatterlist.h> +#include <linux/dma-debug.h> +#include <linux/kmemcheck.h> + +struct dma_iommu_mapping { + /* iommu specific data */ + struct iommu_domain *domain; + + void *bitmap; + size_t bits; + unsigned int order; + dma_addr_t base; + + spinlock_t lock; + struct kref kref; +}; + +struct dma_iommu_mapping * +arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, size_t size, + int order); + +void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping); + +int arm_iommu_attach_device(struct device *dev, + struct dma_iommu_mapping *mapping); + +#endif /* __KERNEL__ */ +#endif |