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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_IOMMU_HELPER_H #define _LINUX_IOMMU_HELPER_H #include #include #include #include static inline unsigned long iommu_device_max_index(unsigned long size, unsigned long offset, u64 dma_mask) { if (size + offset > dma_mask) return dma_mask - offset + 1; else return size; } static inline int iommu_is_span_boundary(unsigned int index, unsigned int nr, unsigned long shift, unsigned long boundary_size) { BUG_ON(!is_power_of_2(boundary_size)); shift = (shift + index) & (boundary_size - 1); return shift + nr > boundary_size; } extern unsigned long iommu_area_alloc(unsigned long *map, unsigned long size, unsigned long start, unsigned int nr,