summaryrefslogtreecommitdiff
path: root/arch/arm64/include/asm/dma-mapping.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm64/include/asm/dma-mapping.h')
-rw-r--r--arch/arm64/include/asm/dma-mapping.h17
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 */