| Christoph Hellwig | ea8c64a | 2018-01-10 16:21:13 +0100 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef ASM_POWERPC_DMA_DIRECT_H |
| 3 | #define ASM_POWERPC_DMA_DIRECT_H 1 |
| 4 | |
| 5 | static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) |
| 6 | { |
| 7 | #ifdef CONFIG_SWIOTLB |
| 8 | struct dev_archdata *sd = &dev->archdata; |
| 9 | |
| 10 | if (sd->max_direct_dma_addr && addr + size > sd->max_direct_dma_addr) |
| 11 | return false; |
| 12 | #endif |
| 13 | |
| 14 | if (!dev->dma_mask) |
| 15 | return false; |
| 16 | |
| 17 | return addr + size - 1 <= *dev->dma_mask; |
| 18 | } |
| 19 | |
| 20 | static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) |
| 21 | { |
| 22 | return paddr + get_dma_offset(dev); |
| 23 | } |
| 24 | |
| 25 | static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) |
| 26 | { |
| 27 | return daddr - get_dma_offset(dev); |
| 28 | } |
| 29 | #endif /* ASM_POWERPC_DMA_DIRECT_H */ |