2 * Implements the generic device dma API for microblaze and the pci
4 * Copyright (C) 2009-2010 Michal Simek <monstr@monstr.eu>
5 * Copyright (C) 2009-2010 PetaLogix
7 * This file is subject to the terms and conditions of the GNU General
8 * Public License. See the file COPYING in the main directory of this
9 * archive for more details.
11 * This file is base on powerpc and x86 dma-mapping.h versions
12 * Copyright (C) 2004 IBM
15 #ifndef _ASM_MICROBLAZE_DMA_MAPPING_H
16 #define _ASM_MICROBLAZE_DMA_MAPPING_H
19 * See Documentation/DMA-API-HOWTO.txt and
20 * Documentation/DMA-API.txt for documentation.
23 #include <linux/types.h>
24 #include <linux/cache.h>
26 #include <linux/scatterlist.h>
27 #include <linux/dma-debug.h>
29 #include <asm/cacheflush.h>
31 #define DMA_ERROR_CODE (~(dma_addr_t)0x0)
33 #define __dma_alloc_coherent(dev, gfp, size, handle) NULL
34 #define __dma_free_coherent(size, addr) ((void)0)
37 * Available generic sets of operations
39 extern struct dma_map_ops dma_direct_ops;
41 static inline struct dma_map_ops *get_dma_ops(struct device *dev)
43 return &dma_direct_ops;
46 static inline void __dma_sync(unsigned long paddr,
47 size_t size, enum dma_data_direction direction)
51 case DMA_BIDIRECTIONAL:
52 flush_dcache_range(paddr, paddr + size);
55 invalidate_dcache_range(paddr, paddr + size);
62 static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
63 enum dma_data_direction direction)
65 BUG_ON(direction == DMA_NONE);
66 __dma_sync(virt_to_phys(vaddr), size, (int)direction);
69 #endif /* _ASM_MICROBLAZE_DMA_MAPPING_H */