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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef ASMARM_DMA_IOMMU_H #define ASMARM_DMA_IOMMU_H #ifdef __KERNEL__ #include <linux/mm_types.h> #include <linux/scatterlist.h> #include <linux/kref.h> 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(const 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); #endif /* __KERNEL__ */ #endif