| /* 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 */ |
