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dma-mapping: move the dma_coherent flag to struct device

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Various architectures support both coherent and non-coherent dma on a
per-device basis.  Move the dma_noncoherent flag from the mips archdata
field to struct device proper to prepare the infrastructure for reuse on
other architectures.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Paul Burton <paul.burton@mips.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christoph Hellwig
2018-08-19 14:53:20 +02:00
parent 5748e1b35b
commit f3ecc0ff04
9 changed files with 41 additions and 46 deletions
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16
include/linux/dma-noncoherent.h
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@@ -4,6 +4,22 @@
#include <linux/dma-mapping.h>
#ifdef CONFIG_ARCH_HAS_DMA_COHERENCE_H
#include <asm/dma-coherence.h>
#elif defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \
defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \
defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL)
static inline bool dev_is_dma_coherent(struct device *dev)
{
return dev->dma_coherent;
}
#else
static inline bool dev_is_dma_coherent(struct device *dev)
{
return true;
}
#endif /* CONFIG_ARCH_HAS_DMA_COHERENCE_H */
void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
gfp_t gfp, unsigned long attrs);
void arch_dma_free(struct device *dev, size_t size, void *cpu_addr,