2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org>
9 #ifndef __ASM_MACH_GENERIC_DMA_COHERENCE_H
10 #define __ASM_MACH_GENERIC_DMA_COHERENCE_H
14 static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr,
17 return virt_to_phys(addr);
20 static inline dma_addr_t plat_map_dma_mem_page(struct device *dev,
23 return page_to_phys(page);
26 static inline unsigned long plat_dma_addr_to_phys(struct device *dev,
32 static inline void plat_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr,
33 size_t size, enum dma_data_direction direction)
37 static inline int plat_dma_supported(struct device *dev, u64 mask)
40 * we fall back to GFP_DMA when the mask isn't all 1s,
41 * so we can't guarantee allocations that must be
42 * within a tighter range than GFP_DMA..
44 if (mask < DMA_BIT_MASK(24))
50 static inline int plat_device_is_coherent(struct device *dev)
52 #ifdef CONFIG_DMA_PERDEV_COHERENT
53 return dev->archdata.dma_coherent;
57 case IO_COHERENCE_DEFAULT:
59 case IO_COHERENCE_ENABLED:
61 case IO_COHERENCE_DISABLED:
67 #ifndef plat_post_dma_flush
68 static inline void plat_post_dma_flush(struct device *dev)
74 static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
79 static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
85 #endif /* __ASM_MACH_GENERIC_DMA_COHERENCE_H */