| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef ASM_ARM_DMA_DIRECT_H |
| #define ASM_ARM_DMA_DIRECT_H 1 |
| |
| #include <asm/memory.h> |
| |
| /* |
| * dma_to_pfn/pfn_to_dma/virt_to_dma are architecture private |
| * functions used internally by the DMA-mapping API to provide DMA |
| * addresses. They must not be used by drivers. |
| */ |
| static inline dma_addr_t pfn_to_dma(struct device *dev, unsigned long pfn) |
| { |
| if (dev && dev->dma_range_map) |
| pfn = PFN_DOWN(translate_phys_to_dma(dev, PFN_PHYS(pfn))); |
| return (dma_addr_t)__pfn_to_bus(pfn); |
| } |
| |
| static inline unsigned long dma_to_pfn(struct device *dev, dma_addr_t addr) |
| { |
| unsigned long pfn = __bus_to_pfn(addr); |
| |
| if (dev && dev->dma_range_map) |
| pfn = PFN_DOWN(translate_dma_to_phys(dev, PFN_PHYS(pfn))); |
| return pfn; |
| } |
| |
| static inline dma_addr_t virt_to_dma(struct device *dev, void *addr) |
| { |
| if (dev) |
| return pfn_to_dma(dev, virt_to_pfn(addr)); |
| |
| return (dma_addr_t)__virt_to_bus((unsigned long)(addr)); |
| } |
| |
| 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; |
| } |
| |
| #endif /* ASM_ARM_DMA_DIRECT_H */ |
