2 * include/asm-xtensa/dma-mapping.h
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
8 * Copyright (C) 2003 - 2005 Tensilica Inc.
11 #ifndef _XTENSA_DMA_MAPPING_H
12 #define _XTENSA_DMA_MAPPING_H
14 #include <asm/cache.h>
17 #include <linux/scatterlist.h>
19 #define DMA_ERROR_CODE (~(dma_addr_t)0x0)
22 * DMA-consistent mapping functions.
25 extern void *consistent_alloc(int, size_t, dma_addr_t
, unsigned long);
26 extern void consistent_free(void*, size_t, dma_addr_t
);
27 extern void consistent_sync(void*, size_t, int);
29 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
30 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
32 void *dma_alloc_coherent(struct device
*dev
, size_t size
,
33 dma_addr_t
*dma_handle
, gfp_t flag
);
35 void dma_free_coherent(struct device
*dev
, size_t size
,
36 void *vaddr
, dma_addr_t dma_handle
);
38 static inline dma_addr_t
39 dma_map_single(struct device
*dev
, void *ptr
, size_t size
,
40 enum dma_data_direction direction
)
42 BUG_ON(direction
== DMA_NONE
);
43 consistent_sync(ptr
, size
, direction
);
44 return virt_to_phys(ptr
);
48 dma_unmap_single(struct device
*dev
, dma_addr_t dma_addr
, size_t size
,
49 enum dma_data_direction direction
)
51 BUG_ON(direction
== DMA_NONE
);
55 dma_map_sg(struct device
*dev
, struct scatterlist
*sg
, int nents
,
56 enum dma_data_direction direction
)
60 BUG_ON(direction
== DMA_NONE
);
62 for (i
= 0; i
< nents
; i
++, sg
++ ) {
65 sg
->dma_address
= sg_phys(sg
);
66 consistent_sync(sg_virt(sg
), sg
->length
, direction
);
72 static inline dma_addr_t
73 dma_map_page(struct device
*dev
, struct page
*page
, unsigned long offset
,
74 size_t size
, enum dma_data_direction direction
)
76 BUG_ON(direction
== DMA_NONE
);
77 return (dma_addr_t
)(page_to_pfn(page
)) * PAGE_SIZE
+ offset
;
81 dma_unmap_page(struct device
*dev
, dma_addr_t dma_address
, size_t size
,
82 enum dma_data_direction direction
)
84 BUG_ON(direction
== DMA_NONE
);
89 dma_unmap_sg(struct device
*dev
, struct scatterlist
*sg
, int nhwentries
,
90 enum dma_data_direction direction
)
92 BUG_ON(direction
== DMA_NONE
);
96 dma_sync_single_for_cpu(struct device
*dev
, dma_addr_t dma_handle
, size_t size
,
97 enum dma_data_direction direction
)
99 consistent_sync((void *)bus_to_virt(dma_handle
), size
, direction
);
103 dma_sync_single_for_device(struct device
*dev
, dma_addr_t dma_handle
,
104 size_t size
, enum dma_data_direction direction
)
106 consistent_sync((void *)bus_to_virt(dma_handle
), size
, direction
);
110 dma_sync_single_range_for_cpu(struct device
*dev
, dma_addr_t dma_handle
,
111 unsigned long offset
, size_t size
,
112 enum dma_data_direction direction
)
115 consistent_sync((void *)bus_to_virt(dma_handle
)+offset
,size
,direction
);
119 dma_sync_single_range_for_device(struct device
*dev
, dma_addr_t dma_handle
,
120 unsigned long offset
, size_t size
,
121 enum dma_data_direction direction
)
124 consistent_sync((void *)bus_to_virt(dma_handle
)+offset
,size
,direction
);
127 dma_sync_sg_for_cpu(struct device
*dev
, struct scatterlist
*sg
, int nelems
,
128 enum dma_data_direction dir
)
131 for (i
= 0; i
< nelems
; i
++, sg
++)
132 consistent_sync(sg_virt(sg
), sg
->length
, dir
);
136 dma_sync_sg_for_device(struct device
*dev
, struct scatterlist
*sg
, int nelems
,
137 enum dma_data_direction dir
)
140 for (i
= 0; i
< nelems
; i
++, sg
++)
141 consistent_sync(sg_virt(sg
), sg
->length
, dir
);
144 dma_mapping_error(struct device
*dev
, dma_addr_t dma_addr
)
150 dma_supported(struct device
*dev
, u64 mask
)
156 dma_set_mask(struct device
*dev
, u64 mask
)
158 if(!dev
->dma_mask
|| !dma_supported(dev
, mask
))
161 *dev
->dma_mask
= mask
;
167 dma_cache_sync(struct device
*dev
, void *vaddr
, size_t size
,
168 enum dma_data_direction direction
)
170 consistent_sync(vaddr
, size
, direction
);
173 /* Not supported for now */
174 static inline int dma_mmap_coherent(struct device
*dev
,
175 struct vm_area_struct
*vma
, void *cpu_addr
,
176 dma_addr_t dma_addr
, size_t size
)
181 static inline int dma_get_sgtable(struct device
*dev
, struct sg_table
*sgt
,
182 void *cpu_addr
, dma_addr_t dma_addr
,
188 #endif /* _XTENSA_DMA_MAPPING_H */