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authorStefano Stabellini <stefano.stabellini@eu.citrix.com>2014-11-21 11:04:39 +0000
committerDavid Vrabel <david.vrabel@citrix.com>2014-12-04 12:41:51 +0000
commita0f2dee0cd651efb5fac6a1d35b0a14460ebcdd4 (patch)
tree744fe380abf1d0c9676cdec3e39e31e3863ef613 /arch/arm64/include/asm
parent2e2a7817fdb6304f8c95c29dae0c93e2727240f4 (diff)
downloadlinux-a0f2dee0cd651efb5fac6a1d35b0a14460ebcdd4.tar.gz
xen: add a dma_addr_t dev_addr argument to xen_dma_map_page
dev_addr is the machine address of the page. The new parameter can be used by the ARM and ARM64 implementations of xen_dma_map_page to find out if the page is a local page (pfn == mfn) or a foreign page (pfn != mfn). dev_addr could be retrieved again from the physical address, using pfn_to_mfn, but it requires accessing an rbtree. Since we already have the dev_addr in our hands at the call site there is no need to get the mfn twice. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch/arm64/include/asm')
-rw-r--r--arch/arm64/include/asm/xen/page-coherent.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/xen/page-coherent.h b/arch/arm64/include/asm/xen/page-coherent.h
index dde3fc9c49f0..d7cd4c2b2fd2 100644
--- a/arch/arm64/include/asm/xen/page-coherent.h
+++ b/arch/arm64/include/asm/xen/page-coherent.h
@@ -20,8 +20,8 @@ static inline void xen_free_coherent_pages(struct device *hwdev, size_t size,
}
static inline void xen_dma_map_page(struct device *hwdev, struct page *page,
- unsigned long offset, size_t size, enum dma_data_direction dir,
- struct dma_attrs *attrs)
+ dma_addr_t dev_addr, unsigned long offset, size_t size,
+ enum dma_data_direction dir, struct dma_attrs *attrs)
{
}