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kernel
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linux
iommu/dma: remove most stubs in iommu-dma.h
The direct calls from mapping.c all guarded by use_dma_iommu(), so don't
bother to provide stubs, but instead just expose the prototypes
unconditionally.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Leon Romanovsky <leon@kernel.org>
+8
-100
include/linux/iommu-dma.h
+8
-100
include/linux/iommu-dma.h
···
14
14
{
15
15
return dev->dma_iommu;
16
16
}
17
+
#else
18
+
static inline bool use_dma_iommu(struct device *dev)
19
+
{
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+
return false;
21
+
}
22
+
#endif /* CONFIG_IOMMU_DMA */
23
+
17
24
dma_addr_t iommu_dma_map_page(struct device *dev, struct page *page,
18
25
unsigned long offset, size_t size, enum dma_data_direction dir,
19
26
unsigned long attrs);
···
65
58
int nelems, enum dma_data_direction dir);
66
59
void iommu_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sgl,
67
60
int nelems, enum dma_data_direction dir);
68
-
#else
69
-
static inline bool use_dma_iommu(struct device *dev)
70
-
{
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-
return false;
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-
}
73
-
static inline dma_addr_t iommu_dma_map_page(struct device *dev,
74
-
struct page *page, unsigned long offset, size_t size,
75
-
enum dma_data_direction dir, unsigned long attrs)
76
-
{
77
-
return DMA_MAPPING_ERROR;
78
-
}
79
-
static inline void iommu_dma_unmap_page(struct device *dev,
80
-
dma_addr_t dma_handle, size_t size, enum dma_data_direction dir,
81
-
unsigned long attrs)
82
-
{
83
-
}
84
-
static inline int iommu_dma_map_sg(struct device *dev, struct scatterlist *sg,
85
-
int nents, enum dma_data_direction dir, unsigned long attrs)
86
-
{
87
-
return -EINVAL;
88
-
}
89
-
static inline void iommu_dma_unmap_sg(struct device *dev,
90
-
struct scatterlist *sg, int nents, enum dma_data_direction dir,
91
-
unsigned long attrs)
92
-
{
93
-
}
94
-
static inline void *iommu_dma_alloc(struct device *dev, size_t size,
95
-
dma_addr_t *handle, gfp_t gfp, unsigned long attrs)
96
-
{
97
-
return NULL;
98
-
}
99
-
static inline int iommu_dma_mmap(struct device *dev, struct vm_area_struct *vma,
100
-
void *cpu_addr, dma_addr_t dma_addr, size_t size,
101
-
unsigned long attrs)
102
-
{
103
-
return -EINVAL;
104
-
}
105
-
static inline int iommu_dma_get_sgtable(struct device *dev,
106
-
struct sg_table *sgt, void *cpu_addr, dma_addr_t dma_addr,
107
-
size_t size, unsigned long attrs)
108
-
{
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-
return -EINVAL;
110
-
}
111
-
static inline unsigned long iommu_dma_get_merge_boundary(struct device *dev)
112
-
{
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-
return 0;
114
-
}
115
-
static inline size_t iommu_dma_opt_mapping_size(void)
116
-
{
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-
return 0;
118
-
}
119
-
static inline size_t iommu_dma_max_mapping_size(struct device *dev)
120
-
{
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-
return 0;
122
-
}
123
-
static inline void iommu_dma_free(struct device *dev, size_t size,
124
-
void *cpu_addr, dma_addr_t handle, unsigned long attrs)
125
-
{
126
-
}
127
-
static inline dma_addr_t iommu_dma_map_resource(struct device *dev,
128
-
phys_addr_t phys, size_t size, enum dma_data_direction dir,
129
-
unsigned long attrs)
130
-
{
131
-
return DMA_MAPPING_ERROR;
132
-
}
133
-
static inline void iommu_dma_unmap_resource(struct device *dev,
134
-
dma_addr_t handle, size_t size, enum dma_data_direction dir,
135
-
unsigned long attrs)
136
-
{
137
-
}
138
-
static inline struct sg_table *
139
-
iommu_dma_alloc_noncontiguous(struct device *dev, size_t size,
140
-
enum dma_data_direction dir, gfp_t gfp, unsigned long attrs)
141
-
{
142
-
return NULL;
143
-
}
144
-
static inline void iommu_dma_free_noncontiguous(struct device *dev, size_t size,
145
-
struct sg_table *sgt, enum dma_data_direction dir)
146
-
{
147
-
}
148
-
static inline void iommu_dma_sync_single_for_cpu(struct device *dev,
149
-
dma_addr_t dma_handle, size_t size,
150
-
enum dma_data_direction dir)
151
-
{
152
-
}
153
-
static inline void iommu_dma_sync_single_for_device(struct device *dev,
154
-
dma_addr_t dma_handle, size_t size, enum dma_data_direction dir)
155
-
{
156
-
}
157
-
static inline void iommu_dma_sync_sg_for_cpu(struct device *dev,
158
-
struct scatterlist *sgl, int nelems,
159
-
enum dma_data_direction dir)
160
-
{
161
-
}
162
-
static inline void iommu_dma_sync_sg_for_device(struct device *dev,
163
-
struct scatterlist *sgl, int nelems,
164
-
enum dma_data_direction dir)
165
-
{
166
-
}
167
-
#endif /* CONFIG_IOMMU_DMA */
61
+
168
62
#endif /* _LINUX_IOMMU_DMA_H */