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sparc: remove arch specific dma_supported implementations

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Usually dma_supported decisions are done by the dma_map_ops instance.
Switch sparc to that model by providing a ->dma_supported instance for
sbus that always returns false, and implementations tailored to the sun4u
and sun4v cases for sparc64, and leave it unimplemented for PCI on
sparc32, which means always supported.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christoph Hellwig
2017-05-22 09:11:30 +02:00
parent c6d333e084
commit b02c2b0bfd
4 changed files with 39 additions and 43 deletions
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3
arch/sparc/include/asm/dma-mapping.h
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@@ -5,9 +5,6 @@
#include <linux/mm.h>
#include <linux/dma-debug.h>
#define HAVE_ARCH_DMA_SUPPORTED 1
int dma_supported(struct device *dev, u64 mask);
static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction dir)
{