| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef ASM_ARM_DMA_DIRECT_H |
| 3 | #define ASM_ARM_DMA_DIRECT_H 1 |
| 4 | |
| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 5 | #include <asm/memory.h> |
| 6 | |
| 7 | /* |
| 8 | * dma_to_pfn/pfn_to_dma/virt_to_dma are architecture private |
| 9 | * functions used internally by the DMA-mapping API to provide DMA |
| 10 | * addresses. They must not be used by drivers. |
| 11 | */ |
| 12 | static inline dma_addr_t pfn_to_dma(struct device *dev, unsigned long pfn) |
| 13 | { |
| 14 | if (dev && dev->dma_range_map) |
| 15 | pfn = PFN_DOWN(translate_phys_to_dma(dev, PFN_PHYS(pfn))); |
| 16 | return (dma_addr_t)__pfn_to_bus(pfn); |
| 17 | } |
| 18 | |
| 19 | static inline unsigned long dma_to_pfn(struct device *dev, dma_addr_t addr) |
| 20 | { |
| 21 | unsigned long pfn = __bus_to_pfn(addr); |
| 22 | |
| 23 | if (dev && dev->dma_range_map) |
| 24 | pfn = PFN_DOWN(translate_dma_to_phys(dev, PFN_PHYS(pfn))); |
| 25 | return pfn; |
| 26 | } |
| 27 | |
| 28 | static inline dma_addr_t virt_to_dma(struct device *dev, void *addr) |
| 29 | { |
| 30 | if (dev) |
| 31 | return pfn_to_dma(dev, virt_to_pfn(addr)); |
| 32 | |
| 33 | return (dma_addr_t)__virt_to_bus((unsigned long)(addr)); |
| 34 | } |
| 35 | |
| 36 | static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 37 | { |
| 38 | unsigned int offset = paddr & ~PAGE_MASK; |
| 39 | return pfn_to_dma(dev, __phys_to_pfn(paddr)) + offset; |
| 40 | } |
| 41 | |
| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 42 | static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr) |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 43 | { |
| 44 | unsigned int offset = dev_addr & ~PAGE_MASK; |
| 45 | return __pfn_to_phys(dma_to_pfn(dev, dev_addr)) + offset; |
| 46 | } |
| 47 | |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 48 | #endif /* ASM_ARM_DMA_DIRECT_H */ |