[PATCH 8/8] ia64: implement dma_mmap_coherent()

[Takashi Iwai <tiwai@suse.de>]

A lazy version of dma_mmap_coherent() implementation for IA64.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 arch/ia64/include/asm/dma-mapping.h |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/arch/ia64/include/asm/dma-mapping.h b/arch/ia64/include/asm/dma-mapping.h
index 5a61b5c..70b2c61 100644
--- a/arch/ia64/include/asm/dma-mapping.h
+++ b/arch/ia64/include/asm/dma-mapping.h
@@ -84,4 +84,20 @@ dma_cache_sync (struct device *dev, void *vaddr, size_t size,
 
 #define dma_is_consistent(d, h)	(1)	/* all we do is coherent memory... */
 
+#define ARCH_HAS_DMA_MMAP_COHERENT
+static inline int dma_mmap_coherent(struct device *dev,
+				    struct vm_area_struct *vma,
+				    void *cpu_addr, dma_addr_t handle,
+				    size_t size)
+{
+	struct dma_map_ops *ops = get_dma_ops(dev);
+	unsigned long pfn;
+
+	if (ops->mmap_coherent)
+		return ops->mmap_coherent(dev, vma, cpu_addr, handle, size);
+	pfn = page_to_pfn(virt_to_page(cpu_addr));
+	return remap_pfn_range(vma, vma->vm_start, pfn + vma->vm_pgoff,
+			       size, vma->vm_page_prot);
+}
+
 #endif /* _ASM_IA64_DMA_MAPPING_H */
-- 
1.6.3.2