/* SPDX-License-Identifier: GPL-2.0 */ #ifndef ASM_ARM_DMA_DIRECT_H #define ASM_ARM_DMA_DIRECT_H 1 static inline dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr) { unsigned int offset = paddr & ~PAGE_MASK; return pfn_to_dma(dev, __phys_to_pfn(paddr)) + offset; } static inline phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dev_addr) { unsigned int offset = dev_addr & ~PAGE_MASK; return __pfn_to_phys(dma_to_pfn(dev, dev_addr)) + offset; } static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) { u64 limit, mask; if (!dev->dma_mask) return 0; mask = *dev->dma_mask; limit = (mask + 1) & ~mask; if (limit && size > limit) return 0; if ((addr | (addr + size - 1)) & ~mask) return 0; return 1; } #endif /* ASM_ARM_DMA_DIRECT_H */