diff options
Diffstat (limited to 'arch/arm64/include/asm/dma-mapping.h')
| -rw-r--r-- | arch/arm64/include/asm/dma-mapping.h | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h index 7dbea6c07..ccea82c2b 100644 --- a/arch/arm64/include/asm/dma-mapping.h +++ b/arch/arm64/include/asm/dma-mapping.h @@ -66,12 +66,16 @@ static inline bool is_device_dma_coherent(struct device *dev) static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) { - return (dma_addr_t)paddr; + dma_addr_t dev_addr = (dma_addr_t)paddr; + + return dev_addr - ((dma_addr_t)dev->dma_pfn_offset << PAGE_SHIFT); } static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr) { - return (phys_addr_t)dev_addr; + phys_addr_t paddr = (phys_addr_t)dev_addr; + + return paddr + ((phys_addr_t)dev->dma_pfn_offset << PAGE_SHIFT); } static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) @@ -86,5 +90,14 @@ static inline void dma_mark_clean(void *addr, size_t size) { } +/* Override for dma_max_pfn() */ +static inline unsigned long dma_max_pfn(struct device *dev) +{ + dma_addr_t dma_max = (dma_addr_t)*dev->dma_mask; + + return (ulong)dma_to_phys(dev, dma_max) >> PAGE_SHIFT; +} +#define dma_max_pfn(dev) dma_max_pfn(dev) + #endif /* __KERNEL__ */ #endif /* __ASM_DMA_MAPPING_H */ |