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MIPS: jazz: split dma mapping operations from dma-default

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Jazz actually has a very basic IOMMU, so split the ops into a separate
implementation from the generic default support (which is about to go
away anyway).

Signed-off-by: Christoph Hellwig <hch@lst.de>
Patchwork: https://patchwork.linux-mips.org/patch/19548/
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: David Daney <david.daney@cavium.com>
Cc: Kevin Cernekee <cernekee@gmail.com>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: Tom Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: iommu@lists.linux-foundation.org
Cc: linux-mips@linux-mips.org
This commit is contained in:
Christoph Hellwig
2018-06-15 13:08:50 +02:00
committed by Paul Burton
parent d1f2564a56
commit c5e2bbb45d
4 changed files with 144 additions and 65 deletions
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5
arch/mips/include/asm/dma-mapping.h
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@@ -10,12 +10,15 @@
#include <dma-coherence.h>
#endif
extern const struct dma_map_ops jazz_dma_ops;
extern const struct dma_map_ops mips_default_dma_map_ops;
extern const struct dma_map_ops mips_swiotlb_ops;
static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
#ifdef CONFIG_SWIOTLB
#if defined(CONFIG_MACH_JAZZ)
return &jazz_dma_ops;
#elif defined(CONFIG_SWIOTLB)
return &mips_swiotlb_ops;
#elif defined(CONFIG_MIPS_DMA_DEFAULT)
return &mips_default_dma_map_ops;