From a0f2dee0cd651efb5fac6a1d35b0a14460ebcdd4 Mon Sep 17 00:00:00 2001 From: Stefano Stabellini Date: Fri, 21 Nov 2014 11:04:39 +0000 Subject: 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 Reviewed-by: Catalin Marinas Acked-by: Konrad Rzeszutek Wilk --- arch/arm64/include/asm/xen/page-coherent.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'arch/arm64/include') 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) { } -- cgit 1.4.1