x86/swiotlb: add default phys<->bus conversion
Xen will override these later on. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -23,6 +23,16 @@ void *swiotlb_alloc(unsigned order, unsigned long nslabs)
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return (void *)__get_free_pages(GFP_DMA | __GFP_NOWARN, order);
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}
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dma_addr_t swiotlb_phys_to_bus(phys_addr_t paddr)
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{
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return paddr;
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}
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phys_addr_t swiotlb_bus_to_phys(dma_addr_t baddr)
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{
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return baddr;
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}
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static dma_addr_t
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swiotlb_map_single_phys(struct device *hwdev, phys_addr_t paddr, size_t size,
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int direction)
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