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iommu/dma: remove most stubs in iommu-dma.h

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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>
This commit is contained in:
Christoph Hellwig 2024-09-22 09:21:10 +02:00
parent bb0e391975
commit 3d09ff4546
1 changed files with 8 additions and 100 deletions
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108
include/linux/iommu-dma.h
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@ -14,6 +14,13 @@ static inline bool use_dma_iommu(struct device *dev)
{
return dev->dma_iommu;
}
#else
static inline bool use_dma_iommu(struct device *dev)
{
return false;
}
#endif /* CONFIG_IOMMU_DMA */
dma_addr_t iommu_dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction dir,
unsigned long attrs);
@ -58,104 +65,5 @@ void iommu_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sgl,
int nelems, enum dma_data_direction dir);
void iommu_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sgl,
int nelems, enum dma_data_direction dir);
#else
static inline bool use_dma_iommu(struct device *dev)
{
return false;
}
static inline dma_addr_t iommu_dma_map_page(struct device *dev,
struct page *page, unsigned long offset, size_t size,
enum dma_data_direction dir, unsigned long attrs)
{
return DMA_MAPPING_ERROR;
}
static inline void iommu_dma_unmap_page(struct device *dev,
dma_addr_t dma_handle, size_t size, enum dma_data_direction dir,
unsigned long attrs)
{
}
static inline int iommu_dma_map_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction dir, unsigned long attrs)
{
return -EINVAL;
}
static inline void iommu_dma_unmap_sg(struct device *dev,
struct scatterlist *sg, int nents, enum dma_data_direction dir,
unsigned long attrs)
{
}
static inline void *iommu_dma_alloc(struct device *dev, size_t size,
dma_addr_t *handle, gfp_t gfp, unsigned long attrs)
{
return NULL;
}
static inline int iommu_dma_mmap(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size,
unsigned long attrs)
{
return -EINVAL;
}
static inline int iommu_dma_get_sgtable(struct device *dev,
struct sg_table *sgt, void *cpu_addr, dma_addr_t dma_addr,
size_t size, unsigned long attrs)
{
return -EINVAL;
}
static inline unsigned long iommu_dma_get_merge_boundary(struct device *dev)
{
return 0;
}
static inline size_t iommu_dma_opt_mapping_size(void)
{
return 0;
}
static inline size_t iommu_dma_max_mapping_size(struct device *dev)
{
return 0;
}
static inline void iommu_dma_free(struct device *dev, size_t size,
void *cpu_addr, dma_addr_t handle, unsigned long attrs)
{
}
static inline dma_addr_t iommu_dma_map_resource(struct device *dev,
phys_addr_t phys, size_t size, enum dma_data_direction dir,
unsigned long attrs)
{
return DMA_MAPPING_ERROR;
}
static inline void iommu_dma_unmap_resource(struct device *dev,
dma_addr_t handle, size_t size, enum dma_data_direction dir,
unsigned long attrs)
{
}
static inline struct sg_table *
iommu_dma_alloc_noncontiguous(struct device *dev, size_t size,
enum dma_data_direction dir, gfp_t gfp, unsigned long attrs)
{
return NULL;
}
static inline void iommu_dma_free_noncontiguous(struct device *dev, size_t size,
struct sg_table *sgt, enum dma_data_direction dir)
{
}
static inline void iommu_dma_sync_single_for_cpu(struct device *dev,
dma_addr_t dma_handle, size_t size,
enum dma_data_direction dir)
{
}
static inline void iommu_dma_sync_single_for_device(struct device *dev,
dma_addr_t dma_handle, size_t size, enum dma_data_direction dir)
{
}
static inline void iommu_dma_sync_sg_for_cpu(struct device *dev,
struct scatterlist *sgl, int nelems,
enum dma_data_direction dir)
{
}
static inline void iommu_dma_sync_sg_for_device(struct device *dev,
struct scatterlist *sgl, int nelems,
enum dma_data_direction dir)
{
}
#endif /* CONFIG_IOMMU_DMA */
#endif /* _LINUX_IOMMU_DMA_H */