1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef ASMARM_DMA_IOMMU_H
3 #define ASMARM_DMA_IOMMU_H
7 #include <linux/mm_types.h>
8 #include <linux/scatterlist.h>
9 #include <linux/kref.h>
11 struct dma_iommu_mapping {
12 /* iommu specific data */
13 struct iommu_domain *domain;
15 unsigned long **bitmaps; /* array of bitmaps */
16 unsigned int nr_bitmaps; /* nr of elements in array */
17 unsigned int extensions;
18 size_t bitmap_size; /* size of a single bitmap */
19 size_t bits; /* per bitmap */
26 struct dma_iommu_mapping *
27 arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, u64 size);
29 void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping);
31 int arm_iommu_attach_device(struct device *dev,
32 struct dma_iommu_mapping *mapping);
33 void arm_iommu_detach_device(struct device *dev);
35 #endif /* __KERNEL__ */