1 #ifndef ASMARM_DMA_IOMMU_H 2 #define ASMARM_DMA_IOMMU_H 3 4 #ifdef __KERNEL__ 5 6 #include <linux/mm_types.h> 7 #include <linux/scatterlist.h> 8 #include <linux/dma-debug.h> 9 #include <linux/kmemcheck.h> 10 11 struct dma_iommu_mapping { 12 /* iommu specific data */ 13 struct iommu_domain *domain; 14 15 void *bitmap; 16 size_t bits; 17 unsigned int order; 18 dma_addr_t base; 19 20 spinlock_t lock; 21 struct kref kref; 22 }; 23 24 struct dma_iommu_mapping * 25 arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, size_t size, 26 int order); 27 28 void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping); 29 30 int arm_iommu_attach_device(struct device *dev, 31 struct dma_iommu_mapping *mapping); 32 33 #endif /* __KERNEL__ */ 34 #endif 35