powerpc/dma: implement new dma_*map*_attrs() interfaces

Update powerpc to use the new dma_*map*_attrs() interfaces. In doing so
update struct dma_mapping_ops to accept a struct dma_attrs and propagate
these changes through to all users of the code (generic IOMMU and the
64bit DMA code, and the iseries and ps3 platform code).

The old dma_*map_*() interfaces are reimplemented as calls to the
corresponding new interfaces.

Signed-off-by: Mark Nelson <markn@au1.ibm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

2 files changed, 94 insertions, 34 deletions

diff --git a/include/asm-powerpc/dma-mapping.h b/include/asm-powerpc/dma-mapping.h
index bbefb69bfb67..de1395023cb1 100644
--- a/include/asm-powerpc/dma-mapping.h
+++ b/include/asm-powerpc/dma-mapping.h
@@ -13,6 +13,7 @@
 /* need struct page definitions */
 #include <linux/mm.h>
 #include <linux/scatterlist.h>
+#include <linux/dma-attrs.h>
 #include <asm/io.h>
 
 #define DMA_ERROR_CODE		(~(dma_addr_t)0x0)
@@ -53,13 +54,17 @@ struct dma_mapping_ops {
 	void		(*free_coherent)(struct device *dev, size_t size,
 				void *vaddr, dma_addr_t dma_handle);
 	dma_addr_t	(*map_single)(struct device *dev, void *ptr,
-				size_t size, enum dma_data_direction direction);
+				size_t size, enum dma_data_direction direction,
+				struct dma_attrs *attrs);
 	void		(*unmap_single)(struct device *dev, dma_addr_t dma_addr,
-				size_t size, enum dma_data_direction direction);
+				size_t size, enum dma_data_direction direction,
+				struct dma_attrs *attrs);
 	int		(*map_sg)(struct device *dev, struct scatterlist *sg,
-				int nents, enum dma_data_direction direction);
+				int nents, enum dma_data_direction direction,
+				struct dma_attrs *attrs);
 	void		(*unmap_sg)(struct device *dev, struct scatterlist *sg,
-				int nents, enum dma_data_direction direction);
+				int nents, enum dma_data_direction direction,
+				struct dma_attrs *attrs);
 	int		(*dma_supported)(struct device *dev, u64 mask);
 	int		(*set_dma_mask)(struct device *dev, u64 dma_mask);
 };
@@ -109,6 +114,77 @@ static inline int dma_set_mask(struct device *dev, u64 dma_mask)
 	return 0;
 }
 
+static inline dma_addr_t dma_map_single_attrs(struct device *dev,
+					      void *cpu_addr,
+					      size_t size,
+					      enum dma_data_direction direction,
+					      struct dma_attrs *attrs)
+{
+	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
+
+	BUG_ON(!dma_ops);
+	return dma_ops->map_single(dev, cpu_addr, size, direction, attrs);
+}
+
+static inline void dma_unmap_single_attrs(struct device *dev,
+					  dma_addr_t dma_addr,
+					  size_t size,
+					  enum dma_data_direction direction,
+					  struct dma_attrs *attrs)
+{
+	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
+
+	BUG_ON(!dma_ops);
+	dma_ops->unmap_single(dev, dma_addr, size, direction, attrs);
+}
+
+static inline dma_addr_t dma_map_page_attrs(struct device *dev,
+					    struct page *page,
+					    unsigned long offset, size_t size,
+					    enum dma_data_direction direction,
+					    struct dma_attrs *attrs)
+{
+	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
+
+	BUG_ON(!dma_ops);
+	return dma_ops->map_single(dev, page_address(page) + offset, size,
+			direction, attrs);
+}
+
+static inline void dma_unmap_page_attrs(struct device *dev,
+					dma_addr_t dma_address,
+					size_t size,
+					enum dma_data_direction direction,
+					struct dma_attrs *attrs)
+{
+	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
+
+	BUG_ON(!dma_ops);
+	dma_ops->unmap_single(dev, dma_address, size, direction, attrs);
+}
+
+static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sg,
+				   int nents, enum dma_data_direction direction,
+				   struct dma_attrs *attrs)
+{
+	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
+
+	BUG_ON(!dma_ops);
+	return dma_ops->map_sg(dev, sg, nents, direction, attrs);
+}
+
+static inline void dma_unmap_sg_attrs(struct device *dev,
+				      struct scatterlist *sg,
+				      int nhwentries,
+				      enum dma_data_direction direction,
+				      struct dma_attrs *attrs)
+{
+	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
+
+	BUG_ON(!dma_ops);
+	dma_ops->unmap_sg(dev, sg, nhwentries, direction, attrs);
+}
+
 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
 				       dma_addr_t *dma_handle, gfp_t flag)
 {
@@ -131,63 +207,43 @@ static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
 					size_t size,
 					enum dma_data_direction direction)
 {
-	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
-
-	BUG_ON(!dma_ops);
-	return dma_ops->map_single(dev, cpu_addr, size, direction);
+	return dma_map_single_attrs(dev, cpu_addr, size, direction, NULL);
 }
 
 static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
 				    size_t size,
 				    enum dma_data_direction direction)
 {
-	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
-
-	BUG_ON(!dma_ops);
-	dma_ops->unmap_single(dev, dma_addr, size, direction);
+	dma_unmap_single_attrs(dev, dma_addr, size, direction, NULL);
 }
 
 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)
 {
-	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
-
-	BUG_ON(!dma_ops);
-	return dma_ops->map_single(dev, page_address(page) + offset, size,
-			direction);
+	return dma_map_page_attrs(dev, page, offset, size, direction, NULL);
 }
 
 static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
 				  size_t size,
 				  enum dma_data_direction direction)
 {
-	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
-
-	BUG_ON(!dma_ops);
-	dma_ops->unmap_single(dev, dma_address, size, direction);
+	dma_unmap_page_attrs(dev, dma_address, size, direction, NULL);
 }
 
 static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
 			     int nents, enum dma_data_direction direction)
 {
-	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
-
-	BUG_ON(!dma_ops);
-	return dma_ops->map_sg(dev, sg, nents, direction);
+	return dma_map_sg_attrs(dev, sg, nents, direction, NULL);
 }
 
 static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
 				int nhwentries,
 				enum dma_data_direction direction)
 {
-	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
-
-	BUG_ON(!dma_ops);
-	dma_ops->unmap_sg(dev, sg, nhwentries, direction);
+	dma_unmap_sg_attrs(dev, sg, nhwentries, direction, NULL);
 }
 
-
 /*
  * Available generic sets of operations
  */
diff --git a/include/asm-powerpc/iommu.h b/include/asm-powerpc/iommu.h
index 65f6682bee87..51ecfef8d843 100644
--- a/include/asm-powerpc/iommu.h
+++ b/include/asm-powerpc/iommu.h
@@ -81,9 +81,11 @@ extern struct iommu_table *iommu_init_table(struct iommu_table * tbl,
 
 extern int iommu_map_sg(struct device *dev, struct iommu_table *tbl,
 			struct scatterlist *sglist, int nelems,
-			unsigned long mask, enum dma_data_direction direction);
+			unsigned long mask, enum dma_data_direction direction,
+			struct dma_attrs *attrs);
 extern void iommu_unmap_sg(struct iommu_table *tbl, struct scatterlist *sglist,
-			   int nelems, enum dma_data_direction direction);
+			   int nelems, enum dma_data_direction direction,
+			   struct dma_attrs *attrs);
 
 extern void *iommu_alloc_coherent(struct device *dev, struct iommu_table *tbl,
 				  size_t size, dma_addr_t *dma_handle,
@@ -92,9 +94,11 @@ extern void iommu_free_coherent(struct iommu_table *tbl, size_t size,
 				void *vaddr, dma_addr_t dma_handle);
 extern dma_addr_t iommu_map_single(struct device *dev, struct iommu_table *tbl,
 				   void *vaddr, size_t size, unsigned long mask,
-				   enum dma_data_direction direction);
+				   enum dma_data_direction direction,
+				   struct dma_attrs *attrs);
 extern void iommu_unmap_single(struct iommu_table *tbl, dma_addr_t dma_handle,
-			       size_t size, enum dma_data_direction direction);
+			       size_t size, enum dma_data_direction direction,
+			       struct dma_attrs *attrs);
 
 extern void iommu_init_early_pSeries(void);
 extern void iommu_init_early_iSeries(void);