| #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> |
| #include <linux/kref.h> |
| |
| #define ARM_MAPPING_ERROR (~(dma_addr_t)0x0) |
| |
| struct dma_iommu_mapping { |
| /* iommu specific data */ |
| struct iommu_domain *domain; |
| |
| unsigned long **bitmaps; /* array of bitmaps */ |
| unsigned int nr_bitmaps; /* nr of elements in array */ |
| unsigned int extensions; |
| size_t bitmap_size; /* size of a single bitmap */ |
| size_t bits; /* per bitmap */ |
| 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, u64 size); |
| |
| void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping); |
| |
| int arm_iommu_attach_device(struct device *dev, |
| struct dma_iommu_mapping *mapping); |
| void arm_iommu_detach_device(struct device *dev); |
| |
| int arm_dma_supported(struct device *dev, u64 mask); |
| |
| #endif /* __KERNEL__ */ |
| #endif |