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arm: remove arch specific dma_supported implementation 

And instead wire it up as method for all the dma_map_ops instances.

Note that the code seems a little fishy for dmabounce and iommu, but
for now I'd like to preserve the existing behavior 1:1.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig 2017-05-22 11:20:18 +02:00
parent 19ad53e498
commit 418a7a7e4f
4 changed files with 8 additions and 5 deletions
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1
arch/arm/common/dmabounce.c
View File

@ -473,6 +473,7 @@ static const struct dma_map_ops dmabounce_ops = {
.sync_sg_for_device = arm_dma_sync_sg_for_device,
.set_dma_mask = dmabounce_set_mask,
.mapping_error = dmabounce_mapping_error,
.dma_supported = arm_dma_supported,
};
static int dmabounce_init_pool(struct dmabounce_pool *pool, struct device *dev,

2
arch/arm/include/asm/dma-iommu.h
View File

@ -35,5 +35,7 @@ int arm_iommu_attach_device(struct device *dev,
struct dma_iommu_mapping *mapping);
void arm_iommu_detach_device(struct device *dev);
int arm_dma_supported(struct device *dev, u64 mask);
#endif /* __KERNEL__ */
#endif

3
arch/arm/include/asm/dma-mapping.h
View File

@ -20,9 +20,6 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
return &arm_dma_ops;
}
#define HAVE_ARCH_DMA_SUPPORTED 1
extern int dma_supported(struct device *dev, u64 mask);
#ifdef __arch_page_to_dma
#error Please update to __arch_pfn_to_dma
#endif

7
arch/arm/mm/dma-mapping.c
View File

@ -199,6 +199,7 @@ const struct dma_map_ops arm_dma_ops = {
.sync_sg_for_cpu = arm_dma_sync_sg_for_cpu,
.sync_sg_for_device = arm_dma_sync_sg_for_device,
.mapping_error = arm_dma_mapping_error,
.dma_supported = arm_dma_supported,
};
EXPORT_SYMBOL(arm_dma_ops);
@ -218,6 +219,7 @@ const struct dma_map_ops arm_coherent_dma_ops = {
.map_page = arm_coherent_dma_map_page,
.map_sg = arm_dma_map_sg,
.mapping_error = arm_dma_mapping_error,
.dma_supported = arm_dma_supported,
};
EXPORT_SYMBOL(arm_coherent_dma_ops);
@ -1184,11 +1186,10 @@ void arm_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
* during bus mastering, then you would pass 0x00ffffff as the mask
* to this function.
*/
int dma_supported(struct device *dev, u64 mask)
int arm_dma_supported(struct device *dev, u64 mask)
{
return __dma_supported(dev, mask, false);
}
EXPORT_SYMBOL(dma_supported);
#define PREALLOC_DMA_DEBUG_ENTRIES 4096
@ -2149,6 +2150,7 @@ const struct dma_map_ops iommu_ops = {
.unmap_resource = arm_iommu_unmap_resource,
.mapping_error = arm_dma_mapping_error,
.dma_supported = arm_dma_supported,
};
const struct dma_map_ops iommu_coherent_ops = {
@ -2167,6 +2169,7 @@ const struct dma_map_ops iommu_coherent_ops = {
.unmap_resource = arm_iommu_unmap_resource,
.mapping_error = arm_dma_mapping_error,
.dma_supported = arm_dma_supported,
};
/**