dma-mapping: alpha: use include/linux/pci-dma-compat.h

This converts Alpha to use include/linux/pci-dma-compat.h.  Alpha is the
only architecutre that implements the PCI DMA API in the own way.  That
makes it difficult to implement the generic DMA API via the PCI bus
specific DMA API.

The generic DMA API calls the PCI DMA API implementation in
arch/alpha/kernel/pci_iommu.c on non Jensen systems.  It calls the DMA API
in arch/alpha/kernel/pci-noop.c on Jensen systems.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Greg KH <greg@kroah.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 29 insertions, 50 deletions

diff --git a/arch/alpha/include/asm/dma-mapping.h b/arch/alpha/include/asm/dma-mapping.h
index f514edec9f5..1bce8169733 100644
--- a/arch/alpha/include/asm/dma-mapping.h
+++ b/arch/alpha/include/asm/dma-mapping.h
@@ -1,70 +1,49 @@
 #ifndef _ALPHA_DMA_MAPPING_H
 #define _ALPHA_DMA_MAPPING_H
 
+#include <linux/dma-attrs.h>
 
-#ifdef CONFIG_PCI
+extern struct dma_map_ops *dma_ops;
 
-#include <linux/pci.h>
+static inline struct dma_map_ops *get_dma_ops(struct device *dev)
+{
+	return dma_ops;
+}
 
-#define dma_map_single(dev, va, size, dir)		\
-		pci_map_single(alpha_gendev_to_pci(dev), va, size, dir)
-#define dma_unmap_single(dev, addr, size, dir)		\
-		pci_unmap_single(alpha_gendev_to_pci(dev), addr, size, dir)
-#define dma_alloc_coherent(dev, size, addr, gfp)	\
-	      __pci_alloc_consistent(alpha_gendev_to_pci(dev), size, addr, gfp)
-#define dma_free_coherent(dev, size, va, addr)		\
-		pci_free_consistent(alpha_gendev_to_pci(dev), size, va, addr)
-#define dma_map_page(dev, page, off, size, dir)		\
-		pci_map_page(alpha_gendev_to_pci(dev), page, off, size, dir)
-#define dma_unmap_page(dev, addr, size, dir)		\
-		pci_unmap_page(alpha_gendev_to_pci(dev), addr, size, dir)
-#define dma_map_sg(dev, sg, nents, dir)			\
-		pci_map_sg(alpha_gendev_to_pci(dev), sg, nents, dir)
-#define dma_unmap_sg(dev, sg, nents, dir)		\
-		pci_unmap_sg(alpha_gendev_to_pci(dev), sg, nents, dir)
-#define dma_supported(dev, mask)			\
-		pci_dma_supported(alpha_gendev_to_pci(dev), mask)
-#define dma_mapping_error(dev, addr)				\
-		pci_dma_mapping_error(alpha_gendev_to_pci(dev), addr)
+#include <asm-generic/dma-mapping-common.h>
 
-#else	/* no PCI - no IOMMU. */
+static inline void *dma_alloc_coherent(struct device *dev, size_t size,
+				       dma_addr_t *dma_handle, gfp_t gfp)
+{
+	return get_dma_ops(dev)->alloc_coherent(dev, size, dma_handle, gfp);
+}
 
-#include <asm/io.h>	/* for virt_to_phys() */
+static inline void dma_free_coherent(struct device *dev, size_t size,
+				     void *vaddr, dma_addr_t dma_handle)
+{
+	get_dma_ops(dev)->free_coherent(dev, size, vaddr, dma_handle);
+}
 
-struct scatterlist;
-void *dma_alloc_coherent(struct device *dev, size_t size,
-			 dma_addr_t *dma_handle, gfp_t gfp);
-int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
-	       enum dma_data_direction direction);
+static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+	return get_dma_ops(dev)->mapping_error(dev, dma_addr);
+}
 
-#define dma_free_coherent(dev, size, va, addr)		\
-		free_pages((unsigned long)va, get_order(size))
-#define dma_supported(dev, mask)		(mask < 0x00ffffffUL ? 0 : 1)
-#define dma_map_single(dev, va, size, dir)	virt_to_phys(va)
-#define dma_map_page(dev, page, off, size, dir)	(page_to_pa(page) + off)
+static inline int dma_supported(struct device *dev, u64 mask)
+{
+	return get_dma_ops(dev)->dma_supported(dev, mask);
+}
 
-#define dma_unmap_single(dev, addr, size, dir)	((void)0)
-#define dma_unmap_page(dev, addr, size, dir)	((void)0)
-#define dma_unmap_sg(dev, sg, nents, dir)	((void)0)
-
-#define dma_mapping_error(dev, addr)  (0)
-
-#endif	/* !CONFIG_PCI */
+static inline int dma_set_mask(struct device *dev, u64 mask)
+{
+	return get_dma_ops(dev)->set_dma_mask(dev, mask);
+}
 
 #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)
 #define dma_is_consistent(d, h)			(1)
 
-int dma_set_mask(struct device *dev, u64 mask);
-
-#define dma_sync_single_for_cpu(dev, addr, size, dir)	  ((void)0)
-#define dma_sync_single_for_device(dev, addr, size, dir)  ((void)0)
-#define dma_sync_sg_for_cpu(dev, sg, nents, dir)	  ((void)0)
-#define dma_sync_sg_for_device(dev, sg, nents, dir)	  ((void)0)
 #define dma_cache_sync(dev, va, size, dir)		  ((void)0)
-#define dma_sync_single_range_for_cpu(dev, addr, offset, size, dir)	((void)0)
-#define dma_sync_single_range_for_device(dev, addr, offset, size, dir)	((void)0)
-
 #define dma_get_cache_alignment()			  L1_CACHE_BYTES
 
 #endif	/* _ALPHA_DMA_MAPPING_H */