1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef ASM_ARM_DMA_DIRECT_H
3 #define ASM_ARM_DMA_DIRECT_H 1
4
__phys_to_dma(struct device * dev,phys_addr_t paddr)5 static inline dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
6 {
7 unsigned int offset = paddr & ~PAGE_MASK;
8 return pfn_to_dma(dev, __phys_to_pfn(paddr)) + offset;
9 }
10
__dma_to_phys(struct device * dev,dma_addr_t dev_addr)11 static inline phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dev_addr)
12 {
13 unsigned int offset = dev_addr & ~PAGE_MASK;
14 return __pfn_to_phys(dma_to_pfn(dev, dev_addr)) + offset;
15 }
16
dma_capable(struct device * dev,dma_addr_t addr,size_t size)17 static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
18 {
19 u64 limit, mask;
20
21 if (!dev->dma_mask)
22 return 0;
23
24 mask = *dev->dma_mask;
25
26 limit = (mask + 1) & ~mask;
27 if (limit && size > limit)
28 return 0;
29
30 if ((addr | (addr + size - 1)) & ~mask)
31 return 0;
32
33 return 1;
34 }
35
36 #endif /* ASM_ARM_DMA_DIRECT_H */
37
