1 /*
2 * Implements the generic device dma API for microblaze and the pci
3 *
4 * Copyright (C) 2009-2010 Michal Simek <monstr@monstr.eu>
5 * Copyright (C) 2009-2010 PetaLogix
6 *
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.
10 *
11 * This file is base on powerpc and x86 dma-mapping.h versions
12 * Copyright (C) 2004 IBM
13 */
14
15 #ifndef _ASM_MICROBLAZE_DMA_MAPPING_H
16 #define _ASM_MICROBLAZE_DMA_MAPPING_H
17
18 /*
19 * See Documentation/DMA-API-HOWTO.txt and
20 * Documentation/DMA-API.txt for documentation.
21 */
22
23 #include <linux/types.h>
24 #include <linux/cache.h>
25 #include <linux/mm.h>
26 #include <linux/scatterlist.h>
27 #include <linux/dma-debug.h>
28 #include <linux/dma-attrs.h>
29 #include <asm/io.h>
30 #include <asm/cacheflush.h>
31
32 #define DMA_ERROR_CODE (~(dma_addr_t)0x0)
33
34 #define __dma_alloc_coherent(dev, gfp, size, handle) NULL
35 #define __dma_free_coherent(size, addr) ((void)0)
36
37 /*
38 * Available generic sets of operations
39 */
40 extern struct dma_map_ops dma_direct_ops;
41
get_dma_ops(struct device * dev)42 static inline struct dma_map_ops *get_dma_ops(struct device *dev)
43 {
44 return &dma_direct_ops;
45 }
46
47 #include <asm-generic/dma-mapping-common.h>
48
__dma_sync(unsigned long paddr,size_t size,enum dma_data_direction direction)49 static inline void __dma_sync(unsigned long paddr,
50 size_t size, enum dma_data_direction direction)
51 {
52 switch (direction) {
53 case DMA_TO_DEVICE:
54 case DMA_BIDIRECTIONAL:
55 flush_dcache_range(paddr, paddr + size);
56 break;
57 case DMA_FROM_DEVICE:
58 invalidate_dcache_range(paddr, paddr + size);
59 break;
60 default:
61 BUG();
62 }
63 }
64
dma_cache_sync(struct device * dev,void * vaddr,size_t size,enum dma_data_direction direction)65 static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
66 enum dma_data_direction direction)
67 {
68 BUG_ON(direction == DMA_NONE);
69 __dma_sync(virt_to_phys(vaddr), size, (int)direction);
70 }
71
72 #endif /* _ASM_MICROBLAZE_DMA_MAPPING_H */
73