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dma-mapping: remove the default map_resource implementation

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Instead provide a proper implementation in the direct mapping code, and
also wire it up for arm and powerpc, leaving an error return for all the
IOMMU or virtual mapping instances for which we'd have to wire up an
actual implementation

Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
This commit is contained in:
Christoph Hellwig 2019-01-04 18:20:05 +01:00
parent f17b5f06cb
commit cfced78696
5 changed files with 25 additions and 5 deletions
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14
kernel/dma/direct.c
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@ -356,6 +356,20 @@ out_unmap:
}
EXPORT_SYMBOL(dma_direct_map_sg);
dma_addr_t dma_direct_map_resource(struct device *dev, phys_addr_t paddr,
size_t size, enum dma_data_direction dir, unsigned long attrs)
{
dma_addr_t dma_addr = paddr;
if (unlikely(!dma_direct_possible(dev, dma_addr, size))) {
report_addr(dev, dma_addr, size);
return DMA_MAPPING_ERROR;
}
return dma_addr;
}
EXPORT_SYMBOL(dma_direct_map_resource);
/*
* Because 32-bit DMA masks are so common we expect every architecture to be
* able to satisfy them - either by not supporting more physical memory, or by