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 swiotlb_nr_tbl(void);
28 extern int swiotlb_late_init_with_tbl(char *tlb
, unsigned long nslabs
);
31 * Enumeration for sync targets
33 enum dma_sync_target
{
38 /* define the last possible byte of physical address space as a mapping error */
39 #define SWIOTLB_MAP_ERROR (~(phys_addr_t)0x0)
41 extern phys_addr_t
swiotlb_tbl_map_single(struct device
*hwdev
,
42 dma_addr_t tbl_dma_addr
,
43 phys_addr_t phys
, size_t size
,
44 enum dma_data_direction dir
);
46 extern void swiotlb_tbl_unmap_single(struct device
*hwdev
,
48 size_t size
, enum dma_data_direction dir
);
50 extern void swiotlb_tbl_sync_single(struct device
*hwdev
,
52 size_t size
, enum dma_data_direction dir
,
53 enum dma_sync_target target
);
55 /* Accessory functions. */
56 extern void swiotlb_bounce(phys_addr_t phys
, char *dma_addr
, size_t size
,
57 enum dma_data_direction dir
);
60 *swiotlb_alloc_coherent(struct device
*hwdev
, size_t size
,
61 dma_addr_t
*dma_handle
, gfp_t flags
);
64 swiotlb_free_coherent(struct device
*hwdev
, size_t size
,
65 void *vaddr
, dma_addr_t dma_handle
);
67 extern dma_addr_t
swiotlb_map_page(struct device
*dev
, struct page
*page
,
68 unsigned long offset
, size_t size
,
69 enum dma_data_direction dir
,
70 struct dma_attrs
*attrs
);
71 extern void swiotlb_unmap_page(struct device
*hwdev
, dma_addr_t dev_addr
,
72 size_t size
, enum dma_data_direction dir
,
73 struct dma_attrs
*attrs
);
76 swiotlb_map_sg(struct device
*hwdev
, struct scatterlist
*sg
, int nents
,
77 enum dma_data_direction dir
);
80 swiotlb_unmap_sg(struct device
*hwdev
, struct scatterlist
*sg
, int nents
,
81 enum dma_data_direction dir
);
84 swiotlb_map_sg_attrs(struct device
*hwdev
, struct scatterlist
*sgl
, int nelems
,
85 enum dma_data_direction dir
, struct dma_attrs
*attrs
);
88 swiotlb_unmap_sg_attrs(struct device
*hwdev
, struct scatterlist
*sgl
,
89 int nelems
, enum dma_data_direction dir
,
90 struct dma_attrs
*attrs
);
93 swiotlb_sync_single_for_cpu(struct device
*hwdev
, dma_addr_t dev_addr
,
94 size_t size
, enum dma_data_direction dir
);
97 swiotlb_sync_sg_for_cpu(struct device
*hwdev
, struct scatterlist
*sg
,
98 int nelems
, enum dma_data_direction dir
);
101 swiotlb_sync_single_for_device(struct device
*hwdev
, dma_addr_t dev_addr
,
102 size_t size
, enum dma_data_direction dir
);
105 swiotlb_sync_sg_for_device(struct device
*hwdev
, struct scatterlist
*sg
,
106 int nelems
, enum dma_data_direction dir
);
109 swiotlb_dma_mapping_error(struct device
*hwdev
, dma_addr_t dma_addr
);
112 swiotlb_dma_supported(struct device
*hwdev
, u64 mask
);
114 #ifdef CONFIG_SWIOTLB
115 extern void __init
swiotlb_free(void);
117 static inline void swiotlb_free(void) { }
120 extern void swiotlb_print_info(void);
121 #endif /* __LINUX_SWIOTLB_H */