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Commit f0edfea8 authored by Christoph Hellwig's avatar Christoph Hellwig
Browse files

dma-mapping: move the remap helpers to a separate file 



The dma remap code only makes sense for not cache coherent architectures
(or possibly the corner case of highmem CMA allocations) and currently
is only used by arm, arm64, csky and xtensa.  Split it out into a
separate file with a separate Kconfig symbol, which gets the right
copyright notice given that this code was written by Laura Abbott
working for Code Aurora at that point.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Acked-by: default avatarLaura Abbott <labbott@redhat.com>
Reviewed-by: default avatarRobin Murphy <robin.murphy@arm.com>
parent 704f2c20

arch/arm/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ config ARM 
	select CPU_PM if (SUSPEND || CPU_IDLE)

	select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS

	select DMA_DIRECT_OPS if !MMU

	select DMA_REMAP if MMU

	select EDAC_SUPPORT

	select EDAC_ATOMIC_SCRUB

	select GENERIC_ALLOCATOR

arch/arm64/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -82,6 +82,7 @@ config ARM64 
	select CRC32

	select DCACHE_WORD_ACCESS

	select DMA_DIRECT_OPS

	select DMA_REMAP

	select EDAC_SUPPORT

	select FRAME_POINTER

	select GENERIC_ALLOCATOR

arch/csky/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -9,6 +9,7 @@ config CSKY 
	select CLKSRC_OF

	select DMA_DIRECT_OPS

	select DMA_NONCOHERENT_OPS

	select DMA_REMAP

	select IRQ_DOMAIN

	select HANDLE_DOMAIN_IRQ

	select DW_APB_TIMER_OF

arch/xtensa/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ config XTENSA 
	select CLONE_BACKWARDS

	select COMMON_CLK

	select DMA_DIRECT_OPS

	select DMA_REMAP if MMU

	select GENERIC_ATOMIC64

	select GENERIC_CLOCKEVENTS

	select GENERIC_IRQ_SHOW

kernel/dma/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -51,3 +51,7 @@ config SWIOTLB 
	bool

	select DMA_DIRECT_OPS

	select NEED_DMA_MAP_STATE



config DMA_REMAP

	depends on MMU

	bool