A very lazy version of dma_mmap_coherent() implementation for ppc32.
Signed-off-by: Takashi Iwai <[EMAIL PROTECTED]>
---
include/asm-powerpc/dma-mapping.h | 18 ++++++++++++++++++
1 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/include/asm-powerpc/dma-mapping.h
b/include/asm-powerpc/dma-mapping.h
index bbefb69..a6a9675 100644
--- a/include/asm-powerpc/dma-mapping.h
+++ b/include/asm-powerpc/dma-mapping.h
@@ -306,6 +306,24 @@ static inline void dma_unmap_sg(struct device *dev, struct
scatterlist *sg,
/* We don't do anything here. */
}
+/*
+ * A helper to mmap the pages allocated via dma_alloc_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 page *pg;
+#ifdef CONFIG_NOT_COHERENT_CACHE
+ /* I'm too lazy and can't stop using bus_to_virt() here... */
+ cpu_addr = bus_to_virt(handle);
+#endif
+ pg = virt_to_page(cpu_addr);
+ return remap_pfn_range(vma, vma->vm_start,
+ page_to_pfn(pg) + vma->vm_pgoff,
+ size, vma->vm_page_prot);
+}
#endif /* CONFIG_PPC64 */
static inline void dma_sync_single_for_cpu(struct device *dev,
--
1.5.4.5
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