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powerpc/dma: remove dma_nommu_mmap_coherent

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The coherent cache version of this function already is functionally
identicall to the default version, and by defining the
arch_dma_coherent_to_pfn hook the same is ture for the noncoherent
version as well.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christoph Hellwig
2019-02-13 08:01:24 +01:00
committed by Michael Ellerman
parent 18b53a2d47
commit 6666cc17d7
7 changed files with 6 additions and 28 deletions
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1
arch/powerpc/platforms/Kconfig.cputype
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@@ -402,6 +402,7 @@ config NOT_COHERENT_CACHE
bool
depends on 4xx || PPC_8xx || E200 || PPC_MPC512x || \
GAMECUBE_COMMON || AMIGAONE
select ARCH_HAS_DMA_COHERENT_TO_PFN
default n if PPC_47x
default y

1
arch/powerpc/platforms/pseries/vio.c
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@@ -603,7 +603,6 @@ static void vio_dma_iommu_unmap_sg(struct device *dev,
static const struct dma_map_ops vio_dma_mapping_ops = {
.alloc = vio_dma_iommu_alloc_coherent,
.free = vio_dma_iommu_free_coherent,
.mmap = dma_nommu_mmap_coherent,
.map_sg = vio_dma_iommu_map_sg,
.unmap_sg = vio_dma_iommu_unmap_sg,
.map_page = vio_dma_iommu_map_page,