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Subject[PATCH 19 of 38] x86: add arch specific version of the swiotlb virt<->bus<->virt functions
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From: Ian Campbell <ian.campbell@citrix.com>

These are to be used later and contain the default implementation.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
arch/x86/kernel/pci-swiotlb_64.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arch/x86/kernel/pci-swiotlb_64.c b/arch/x86/kernel/pci-swiotlb_64.c
--- a/arch/x86/kernel/pci-swiotlb_64.c
+++ b/arch/x86/kernel/pci-swiotlb_64.c
@@ -23,6 +23,16 @@
return (void *)__get_free_pages(GFP_DMA | __GFP_NOWARN, order);
}

+unsigned long swiotlb_virt_to_bus(volatile void *address)
+{
+ return virt_to_bus(address);
+}
+
+void * swiotlb_bus_to_virt(unsigned long address)
+{
+ return bus_to_virt(address);
+}
+
static dma_addr_t
swiotlb_map_single_phys(struct device *hwdev, phys_addr_t paddr, size_t size,
int direction)



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