Merge branch 'pending-dma-streaming' (early part) into devel

arch/arm/common/dmabounce.c

@@ -342,6 +342,22 @@ dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
 }
 EXPORT_SYMBOL(dma_map_single);
 
+/*
+ * see if a mapped address was really a "safe" buffer and if so, copy
+ * the data from the safe buffer back to the unsafe buffer and free up
+ * the safe buffer.  (basically return things back to the way they
+ * should be)
+ */
+void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+		enum dma_data_direction dir)
+{
+	dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n",
+		__func__, (void *) dma_addr, size, dir);
+
+	unmap_single(dev, dma_addr, size, dir);
+}
+EXPORT_SYMBOL(dma_unmap_single);
+
 dma_addr_t dma_map_page(struct device *dev, struct page *page,
 		unsigned long offset, size_t size, enum dma_data_direction dir)
 {
@@ -366,8 +382,7 @@ EXPORT_SYMBOL(dma_map_page);
  * the safe buffer.  (basically return things back to the way they
  * should be)
  */
-
-void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+void dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
 		enum dma_data_direction dir)
 {
 	dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n",
@@ -375,7 +390,7 @@ void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
 
 	unmap_single(dev, dma_addr, size, dir);
 }
-EXPORT_SYMBOL(dma_unmap_single);
+EXPORT_SYMBOL(dma_unmap_page);
 
 int dmabounce_sync_for_cpu(struct device *dev, dma_addr_t addr,
 		unsigned long off, size_t sz, enum dma_data_direction dir)

arch/arm/include/asm/dma-mapping.h

@@ -15,20 +15,15 @@
  * must not be used by drivers.
  */
 #ifndef __arch_page_to_dma
-
-#if !defined(CONFIG_HIGHMEM)
-static inline dma_addr_t page_to_dma(struct device *dev, struct page *page)
-{
-	return (dma_addr_t)__virt_to_bus((unsigned long)page_address(page));
-}
-#elif defined(__pfn_to_bus)
 static inline dma_addr_t page_to_dma(struct device *dev, struct page *page)
 {
 	return (dma_addr_t)__pfn_to_bus(page_to_pfn(page));
 }
-#else
-#error "this machine class needs to define __arch_page_to_dma to use HIGHMEM"
-#endif
+
+static inline struct page *dma_to_page(struct device *dev, dma_addr_t addr)
+{
+	return pfn_to_page(__bus_to_pfn(addr));
+}
 
 static inline void *dma_to_virt(struct device *dev, dma_addr_t addr)
 {
@@ -45,6 +40,11 @@ static inline dma_addr_t page_to_dma(struct device *dev, struct page *page)
 	return __arch_page_to_dma(dev, page);
 }
 
+static inline struct page *dma_to_page(struct device *dev, dma_addr_t addr)
+{
+	return __arch_dma_to_page(dev, addr);
+}
+
 static inline void *dma_to_virt(struct device *dev, dma_addr_t addr)
 {
 	return __arch_dma_to_virt(dev, addr);
@@ -257,9 +257,11 @@ extern int dma_needs_bounce(struct device*, dma_addr_t, size_t);
  */
 extern dma_addr_t dma_map_single(struct device *, void *, size_t,
 		enum dma_data_direction);
+extern void dma_unmap_single(struct device *, dma_addr_t, size_t,
+		enum dma_data_direction);
 extern dma_addr_t dma_map_page(struct device *, struct page *,
 		unsigned long, size_t, enum dma_data_direction);
-extern void dma_unmap_single(struct device *, dma_addr_t, size_t,
+extern void dma_unmap_page(struct device *, dma_addr_t, size_t,
 		enum dma_data_direction);
 
 /*
@@ -352,7 +354,6 @@ static inline void dma_unmap_single(struct device *dev, dma_addr_t handle,
 {
 	/* nothing to do */
 }
-#endif /* CONFIG_DMABOUNCE */
 
 /**
  * dma_unmap_page - unmap a buffer previously mapped through dma_map_page()
@@ -371,8 +372,9 @@ static inline void dma_unmap_single(struct device *dev, dma_addr_t handle,
 static inline void dma_unmap_page(struct device *dev, dma_addr_t handle,
 		size_t size, enum dma_data_direction dir)
 {
-	dma_unmap_single(dev, handle, size, dir);
+	/* nothing to do */
 }
+#endif /* CONFIG_DMABOUNCE */
 
 /**
  * dma_sync_single_range_for_cpu

arch/arm/include/asm/memory.h

@@ -136,6 +136,12 @@
 #define	__phys_to_pfn(paddr)	((paddr) >> PAGE_SHIFT)
 #define	__pfn_to_phys(pfn)	((pfn) << PAGE_SHIFT)
 
+/*
+ * Convert a page to/from a physical address
+ */
+#define page_to_phys(page)	(__pfn_to_phys(page_to_pfn(page)))
+#define phys_to_page(phys)	(pfn_to_page(__phys_to_pfn(phys)))
+
 #ifndef __ASSEMBLY__
 
 /*
@@ -196,7 +202,8 @@ static inline void *phys_to_virt(unsigned long x)
 #ifndef __virt_to_bus
 #define __virt_to_bus	__virt_to_phys
 #define __bus_to_virt	__phys_to_virt
-#define __pfn_to_bus(x)	((x) << PAGE_SHIFT)
+#define __pfn_to_bus(x)	__pfn_to_phys(x)
+#define __bus_to_pfn(x)	__phys_to_pfn(x)
 #endif
 
 static inline __deprecated unsigned long virt_to_bus(void *x)
@@ -294,11 +301,6 @@ static inline __deprecated void *bus_to_virt(unsigned long x)
 
 #endif /* !CONFIG_DISCONTIGMEM */
 
-/*
- * For BIO.  "will die".  Kill me when bio_to_phys() and bvec_to_phys() die.
- */
-#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
-
 /*
  * Optional coherency support.  Currently used only by selected
  * Intel XSC3-based systems.

arch/arm/mach-iop13xx/include/mach/memory.h

@@ -64,6 +64,8 @@ static inline unsigned long __lbus_to_virt(dma_addr_t x)
 		(dma_addr_t)page_to_phys(page);				\
 	})
 
+#define __arch_dma_to_page(dev, addr)	phys_to_page(addr)
+
 #endif /* CONFIG_ARCH_IOP13XX */
 #endif /* !ASSEMBLY */
 

arch/arm/mach-ks8695/include/mach/memory.h

@@ -41,6 +41,13 @@ extern struct bus_type platform_bus_type;
 		__dma = __dma - PHYS_OFFSET + KS8695_PCIMEM_PA; \
 	   __dma; })
 
+#define __arch_dma_to_page(dev, x)	\
+	({ dma_addr_t __dma = x;				\
+	   if (!is_lbus_device(dev))				\
+		__dma += PHYS_OFFSET - KS8695_PCIMEM_PA;	\
+	   phys_to_page(__dma);					\
+	})
+
 #endif
 
 #endif

arch/arm/plat-omap/include/mach/memory.h

@@ -68,6 +68,13 @@
 		__dma = __dma - PHYS_OFFSET + OMAP1510_LB_OFFSET; \
 	   __dma; })
 
+#define __arch_dma_to_page(dev, addr)	\
+	({ dma_addr_t __dma = addr;				\
+	   if (is_lbus_device(dev))				\
+		__dma += PHYS_OFFSET - OMAP1510_LB_OFFSET;	\
+	   phys_to_page(__dma);					\
+	})
+
 #define __arch_dma_to_virt(dev, addr)	({ (void *) (is_lbus_device(dev) ? \
 						lbus_to_virt(addr) : \
 						__phys_to_virt(addr)); })