A lazy version of dma_mmap_coherent() implementation for IA64.
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
---
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
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