x86: move dma_map_sg to common header

the old i386 implementation is moved to pci-base_32.c
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/kernel/pci-base_32.c

@@ -12,9 +12,28 @@ static dma_addr_t pci32_map_single(struct device *dev, void *ptr,
 	return virt_to_phys(ptr);
 }
 
+static int pci32_dma_map_sg(struct device *dev, struct scatterlist *sglist,
+			    int nents, int direction)
+{
+	struct scatterlist *sg;
+	int i;
+
+	WARN_ON(nents == 0 || sglist[0].length == 0);
+
+	for_each_sg(sglist, sg, nents, i) {
+		BUG_ON(!sg_page(sg));
+
+		sg->dma_address = sg_phys(sg);
+	}
+
+	flush_write_buffers();
+	return nents;
+}
+
 static const struct dma_mapping_ops pci32_dma_ops = {
 	.map_single = pci32_map_single,
 	.unmap_single = NULL,
+	.map_sg = pci32_dma_map_sg,
 };
 
 const struct dma_mapping_ops *dma_ops = &pci32_dma_ops;

include/asm-x86/dma-mapping.h

@@ -75,5 +75,11 @@ dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size,
 		dma_ops->unmap_single(dev, addr, size, direction);
 }
 
-
+static inline int
+dma_map_sg(struct device *hwdev, struct scatterlist *sg,
+	   int nents, int direction)
+{
+	BUG_ON(!valid_dma_direction(direction));
+	return dma_ops->map_sg(hwdev, sg, nents, direction);
+}
 #endif

include/asm-x86/dma-mapping_32.h

@@ -17,26 +17,6 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
 void dma_free_coherent(struct device *dev, size_t size,
 			 void *vaddr, dma_addr_t dma_handle);
 
-static inline int
-dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
-	   enum dma_data_direction direction)
-{
-	struct scatterlist *sg;
-	int i;
-
-	BUG_ON(!valid_dma_direction(direction));
-	WARN_ON(nents == 0 || sglist[0].length == 0);
-
-	for_each_sg(sglist, sg, nents, i) {
-		BUG_ON(!sg_page(sg));
-
-		sg->dma_address = sg_phys(sg);
-	}
-
-	flush_write_buffers();
-	return nents;
-}
-
 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)

include/asm-x86/dma-mapping_64.h

@@ -96,13 +96,6 @@ dma_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
 	flush_write_buffers();
 }
 
-static inline int
-dma_map_sg(struct device *hwdev, struct scatterlist *sg, int nents, int direction)
-{
-	BUG_ON(!valid_dma_direction(direction));
-	return dma_ops->map_sg(hwdev, sg, nents, direction);
-}
-
 static inline void
 dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
 	     int direction)