2 * Copyright 2010 Tilera Corporation. All Rights Reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation, version 2.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
11 * NON INFRINGEMENT. See the GNU General Public License for
15 #ifndef _ASM_TILE_DMA_MAPPING_H
16 #define _ASM_TILE_DMA_MAPPING_H
19 #include <linux/scatterlist.h>
20 #include <linux/cache.h>
24 #define ARCH_HAS_DMA_GET_REQUIRED_MASK
27 extern struct dma_map_ops *tile_dma_map_ops;
28 extern struct dma_map_ops *gx_pci_dma_map_ops;
29 extern struct dma_map_ops *gx_legacy_pci_dma_map_ops;
30 extern struct dma_map_ops *gx_hybrid_pci_dma_map_ops;
32 static inline struct dma_map_ops *get_dma_ops(struct device *dev)
34 if (dev && dev->archdata.dma_ops)
35 return dev->archdata.dma_ops;
37 return tile_dma_map_ops;
40 static inline dma_addr_t get_dma_offset(struct device *dev)
42 return dev->archdata.dma_offset;
45 static inline void set_dma_offset(struct device *dev, dma_addr_t off)
47 dev->archdata.dma_offset = off;
50 static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
55 static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
60 static inline void dma_mark_clean(void *addr, size_t size) {}
62 static inline void set_dma_ops(struct device *dev, struct dma_map_ops *ops)
64 dev->archdata.dma_ops = ops;
67 static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
72 return addr + size - 1 <= *dev->dma_mask;
75 #define HAVE_ARCH_DMA_SET_MASK 1
76 int dma_set_mask(struct device *dev, u64 mask);
79 * dma_alloc_noncoherent() is #defined to return coherent memory,
80 * so there's no need to do any flushing here.
82 static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
83 enum dma_data_direction direction)
87 #endif /* _ASM_TILE_DMA_MAPPING_H */