[PATCH] dma-mapping-broken.h: flesh-out DMA API stubs

[John W. Linville]

This allows some drivers compile on arches that don't support DMA
(e.g. s390).

Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx>
---
Is there any reason why this header should not cover the whole DMA API?

Compile-tested only...

 include/asm-generic/dma-mapping-broken.h |  134 ++++++++++++++++++++++++++++++
 1 files changed, 134 insertions(+), 0 deletions(-)

diff --git a/include/asm-generic/dma-mapping-broken.h b/include/asm-generic/dma-mapping-broken.h
index 29413d3..84812dd 100644
--- a/include/asm-generic/dma-mapping-broken.h
+++ b/include/asm-generic/dma-mapping-broken.h
@@ -21,4 +21,116 @@ dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
 
+static inline dma_addr_t
+dma_map_single(struct device *dev, void *ptr, size_t size,
+	       enum dma_data_direction direction)
+{
+	BUG();
+	return (dma_addr_t)0;
+}
+
+static inline void
+dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+		 enum dma_data_direction direction)
+{
+	BUG();
+}
+
+static inline int
+dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+	   enum dma_data_direction direction)
+{
+	BUG();
+	return 0;
+}
+
+static inline void
+dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
+	     enum dma_data_direction direction)
+{
+	BUG();
+}
+
+static inline dma_addr_t
+dma_map_page(struct device *dev, struct page *page, unsigned long offset,
+	     size_t size, enum dma_data_direction direction)
+{
+	BUG();
+	return (dma_addr_t)0;
+}
+
+static inline void
+dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
+	       enum dma_data_direction direction)
+{
+	BUG();
+}
+
+static inline void
+dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
+			enum dma_data_direction direction)
+{
+	BUG();
+}
+
+static inline void
+dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
+			      unsigned long offset, size_t size,
+			      enum dma_data_direction direction)
+{
+	BUG();
+}
+
+static inline void
+dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
+		    enum dma_data_direction direction)
+{
+	BUG();
+}
+
+#define dma_sync_single_for_device dma_sync_single_for_cpu
+#define dma_sync_single_range_for_device dma_sync_single_range_for_cpu
+#define dma_sync_sg_for_device dma_sync_sg_for_cpu
+
+static inline int
+dma_mapping_error(dma_addr_t dma_addr)
+{
+	BUG();
+	return 1;
+}
+
+static inline int
+dma_supported(struct device *dev, u64 mask)
+{
+	return 0;
+}
+
+static inline int
+dma_set_mask(struct device *dev, u64 mask)
+{
+	BUG();
+	return -EIO;
+}
+
+static inline int
+dma_get_cache_alignment(void)
+{
+	BUG();
+	return 0;
+}
+
+int
+dma_is_consistent(struct device *dev, dma_addr_t dma_handle)
+{
+	BUG();
+	return 0;
+}
+
+static inline void
+dma_cache_sync(struct device *dev, void *vaddr, size_t size,
+	       enum dma_data_direction direction)
+{
+	BUG();
+}
+
 #endif /* _ASM_GENERIC_DMA_MAPPING_H */
-- 
1.4.4.2
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