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dma-mapping: turn dma_cache_sync into a dma_map_ops method

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After we removed all the dead wood it turns out only two architectures
actually implement dma_cache_sync as a real op: mips and parisc.  Add
a cache_sync method to struct dma_map_ops and implement it for the
mips defualt DMA ops, and the parisc pa11 ops.

Note that arm, arc and openrisc support DMA_ATTR_NON_CONSISTENT, but
never provided a functional dma_cache_sync implementations, which
seems somewhat odd.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
This commit is contained in:
Christoph Hellwig
2017-08-27 10:37:15 +02:00
parent e0c6584df9
commit c9eb6172c3
24 changed files with 24 additions and 128 deletions
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arch/parisc/include/asm/dma-mapping.h
-8
View File
@@ -32,14 +32,6 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
return hppa_dma_ops;
}
static inline void
dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
{
if (hppa_dma_ops->sync_single_for_cpu)
flush_kernel_dcache_range((unsigned long)vaddr, size);
}
static inline void *
parisc_walk_tree(struct device *dev)
{