1 #ifndef __LINUX_SWIOTLB_H
2 #define __LINUX_SWIOTLB_H
4 #include <linux/types.h>
10 extern int swiotlb_force
;
13 * Maximum allowable number of contiguous slabs to map,
14 * must be a power of 2. What is the appropriate value ?
15 * The complexity of {map,unmap}_single is linearly dependent on this value.
17 #define IO_TLB_SEGSIZE 128
20 * log of the size of each IO TLB slab. The number of slabs is command line
23 #define IO_TLB_SHIFT 11
25 extern void swiotlb_init(int verbose
);
26 extern void swiotlb_init_with_tbl(char *tlb
, unsigned long nslabs
, int verbose
);
27 extern unsigned long swioltb_nr_tbl(void);
30 * Enumeration for sync targets
32 enum dma_sync_target
{
36 extern void *swiotlb_tbl_map_single(struct device
*hwdev
, dma_addr_t tbl_dma_addr
,
37 phys_addr_t phys
, size_t size
,
38 enum dma_data_direction dir
);
40 extern void swiotlb_tbl_unmap_single(struct device
*hwdev
, char *dma_addr
,
41 size_t size
, enum dma_data_direction dir
);
43 extern void swiotlb_tbl_sync_single(struct device
*hwdev
, char *dma_addr
,
44 size_t size
, enum dma_data_direction dir
,
45 enum dma_sync_target target
);
47 /* Accessory functions. */
48 extern void swiotlb_bounce(phys_addr_t phys
, char *dma_addr
, size_t size
,
49 enum dma_data_direction dir
);
52 *swiotlb_alloc_coherent(struct device
*hwdev
, size_t size
,
53 dma_addr_t
*dma_handle
, gfp_t flags
);
56 swiotlb_free_coherent(struct device
*hwdev
, size_t size
,
57 void *vaddr
, dma_addr_t dma_handle
);
59 extern dma_addr_t
swiotlb_map_page(struct device
*dev
, struct page
*page
,
60 unsigned long offset
, size_t size
,
61 enum dma_data_direction dir
,
62 struct dma_attrs
*attrs
);
63 extern void swiotlb_unmap_page(struct device
*hwdev
, dma_addr_t dev_addr
,
64 size_t size
, enum dma_data_direction dir
,
65 struct dma_attrs
*attrs
);
68 swiotlb_map_sg(struct device
*hwdev
, struct scatterlist
*sg
, int nents
,
69 enum dma_data_direction dir
);
72 swiotlb_unmap_sg(struct device
*hwdev
, struct scatterlist
*sg
, int nents
,
73 enum dma_data_direction dir
);
76 swiotlb_map_sg_attrs(struct device
*hwdev
, struct scatterlist
*sgl
, int nelems
,
77 enum dma_data_direction dir
, struct dma_attrs
*attrs
);
80 swiotlb_unmap_sg_attrs(struct device
*hwdev
, struct scatterlist
*sgl
,
81 int nelems
, enum dma_data_direction dir
,
82 struct dma_attrs
*attrs
);
85 swiotlb_sync_single_for_cpu(struct device
*hwdev
, dma_addr_t dev_addr
,
86 size_t size
, enum dma_data_direction dir
);
89 swiotlb_sync_sg_for_cpu(struct device
*hwdev
, struct scatterlist
*sg
,
90 int nelems
, enum dma_data_direction dir
);
93 swiotlb_sync_single_for_device(struct device
*hwdev
, dma_addr_t dev_addr
,
94 size_t size
, enum dma_data_direction dir
);
97 swiotlb_sync_sg_for_device(struct device
*hwdev
, struct scatterlist
*sg
,
98 int nelems
, enum dma_data_direction dir
);
101 swiotlb_dma_mapping_error(struct device
*hwdev
, dma_addr_t dma_addr
);
104 swiotlb_dma_supported(struct device
*hwdev
, u64 mask
);
106 #ifdef CONFIG_SWIOTLB
107 extern void __init
swiotlb_free(void);
109 static inline void swiotlb_free(void) { }
112 extern void swiotlb_print_info(void);
113 #endif /* __LINUX_SWIOTLB_H */
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