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authorStefano Stabellini <stefano.stabellini@eu.citrix.com>2013-10-25 10:39:49 +0000
committerStefano Stabellini <stefano.stabellini@eu.citrix.com>2013-10-25 10:39:49 +0000
commit7100b077ab4ff5fb0ba7760ce54465f623a0a763 (patch)
treebc832ec58128110760e9270695158c8c502bc917 /arch/ia64
parent1b65c4e5a9af1a1c61e792e2d0ed481e0c1f21a9 (diff)
downloadlinux-7100b077ab4ff5fb0ba7760ce54465f623a0a763.tar.bz2
xen: introduce xen_dma_map/unmap_page and xen_dma_sync_single_for_cpu/device
Introduce xen_dma_map_page, xen_dma_unmap_page, xen_dma_sync_single_for_cpu and xen_dma_sync_single_for_device. They have empty implementations on x86 and ia64 but they call the corresponding platform dma_ops function on arm and arm64. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Changes in v9: - xen_dma_map_page return void, avoid page_to_phys.
Diffstat (limited to 'arch/ia64')
-rw-r--r--arch/ia64/include/asm/xen/page-coherent.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/xen/page-coherent.h b/arch/ia64/include/asm/xen/page-coherent.h
index 37b929c117bf..96e42f97fa1f 100644
--- a/arch/ia64/include/asm/xen/page-coherent.h
+++ b/arch/ia64/include/asm/xen/page-coherent.h
@@ -21,4 +21,18 @@ static inline void xen_free_coherent_pages(struct device *hwdev, size_t size,
free_pages((unsigned long) cpu_addr, get_order(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) { }
+
+static inline void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
+ size_t size, enum dma_data_direction dir,
+ struct dma_attrs *attrs) { }
+
+static inline void xen_dma_sync_single_for_cpu(struct device *hwdev,
+ dma_addr_t handle, size_t size, enum dma_data_direction dir) { }
+
+static inline void xen_dma_sync_single_for_device(struct device *hwdev,
+ dma_addr_t handle, size_t size, enum dma_data_direction dir) { }
+
#endif /* _ASM_IA64_XEN_PAGE_COHERENT_H */