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 #include <linux/kref.h> 11 12 struct dma_iommu_mapping { 13 /* iommu specific data */ 14 struct iommu_domain *domain; 15 16 void *bitmap; 17 size_t bits; 18 unsigned int order; 19 dma_addr_t base; 20 21 spinlock_t lock; 22 struct kref kref; 23 }; 24 25 struct dma_iommu_mapping * 26 arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, size_t size, 27 int order); 28 29 void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping); 30 31 int arm_iommu_attach_device(struct device *dev, 32 struct dma_iommu_mapping *mapping); 33 void arm_iommu_detach_device(struct device *dev); 34 35 #endif /* __KERNEL__ */ 36 #endif 37