sparc: Replace sbus_map_single and sbus_unmap_single with sbus_map_page and sbus_unmap_page

This is a preparation for using asm-generic/pci-dma-compat.h;
SPARC32 has two dma_map_ops structures for pci and sbus
(removing arch/sparc/kernel/dma.c, PCI and SBUS DMA accessor).

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Tested-by: Robert Reif <reif@earthlink.net>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: tony.luck@intel.com
Cc: fenghua.yu@intel.com
LKML-Reference: <1249872797-1314-7-git-send-email-fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/sparc/kernel/dma.c

@@ -68,8 +68,7 @@ static dma_addr_t dma32_map_page(struct device *dev, struct page *page,
 		return pci_map_page(to_pci_dev(dev), page, offset,
 				    size, (int)direction);
 #endif
-	return sbus_map_single(dev, page_address(page) + offset,
-			       size, (int)direction);
+	return sbus_map_page(dev, page, offset, size, (int)direction);
 }
 
 static void dma32_unmap_page(struct device *dev, dma_addr_t dma_address,
@@ -83,7 +82,7 @@ static void dma32_unmap_page(struct device *dev, dma_addr_t dma_address,
 		return;
 	}
 #endif
-	sbus_unmap_single(dev, dma_address, size, (int)direction);
+	sbus_unmap_page(dev, dma_address, size, (int)direction);
 }
 
 static int dma32_map_sg(struct device *dev, struct scatterlist *sg,

arch/sparc/kernel/dma.h

@@ -1,8 +1,8 @@
 void *sbus_alloc_consistent(struct device *dev, long len, u32 *dma_addrp);
 void sbus_free_consistent(struct device *dev, long n, void *p, u32 ba);
-dma_addr_t sbus_map_single(struct device *dev, void *va,
-			   size_t len, int direction);
-void sbus_unmap_single(struct device *dev, dma_addr_t ba,
+dma_addr_t sbus_map_page(struct device *dev, struct page *page,
+			 unsigned long offset, size_t len, int direction);
+void sbus_unmap_page(struct device *dev, dma_addr_t ba,
 		       size_t n, int direction);
 int sbus_map_sg(struct device *dev, struct scatterlist *sg,
 		int n, int direction);

arch/sparc/kernel/ioport.c

@@ -337,8 +337,11 @@ void sbus_free_consistent(struct device *dev, long n, void *p, u32 ba)
  * CPU view of this memory may be inconsistent with
  * a device view and explicit flushing is necessary.
  */
-dma_addr_t sbus_map_single(struct device *dev, void *va, size_t len, int direction)
+dma_addr_t sbus_map_page(struct device *dev, struct page *page,
+			 unsigned long offset, size_t len, int direction)
 {
+	void *va = page_address(page) + offset;
+
 	/* XXX why are some lengths signed, others unsigned? */
 	if (len <= 0) {
 		return 0;
@@ -350,7 +353,7 @@ dma_addr_t sbus_map_single(struct device *dev, void *va, size_t len, int directi
 	return mmu_get_scsi_one(dev, va, len);
 }
 
-void sbus_unmap_single(struct device *dev, dma_addr_t ba, size_t n, int direction)
+void sbus_unmap_page(struct device *dev, dma_addr_t ba, size_t n, int direction)
 {
 	mmu_release_scsi_one(dev, ba, n);
 }