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authorRussell King <rmk+kernel@arm.linux.org.uk>2009-12-04 15:00:08 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-12-04 15:00:11 +0000
commit2fc42814d8a9dd757abc7f80fbf11e9247e97d40 (patch)
tree8216bbfc4fdf9bda4e30c04f415725dd0ef6da4f /arch/arm/include
parentc6baa1963c2a76ffdb157e8b9a5a55b30046b125 (diff)
parent29cb8d0d249f6b8fa33683cc17622ff16ada834c (diff)
Merge branch 'pending-dma-streaming' (early part) into devel
Diffstat (limited to 'arch/arm/include')
-rw-r--r--arch/arm/include/asm/dma-mapping.h26
-rw-r--r--arch/arm/include/asm/memory.h14
2 files changed, 22 insertions, 18 deletions
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index ff46dfa68a9..a96300bf83f 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/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));
+ return (dma_addr_t)__pfn_to_bus(page_to_pfn(page));
}
-#elif defined(__pfn_to_bus)
-static inline dma_addr_t page_to_dma(struct device *dev, struct page *page)
+
+static inline struct page *dma_to_page(struct device *dev, dma_addr_t addr)
{
- return (dma_addr_t)__pfn_to_bus(page_to_pfn(page));
+ return pfn_to_page(__bus_to_pfn(addr));
}
-#else
-#error "this machine class needs to define __arch_page_to_dma to use HIGHMEM"
-#endif
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
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index bc2ff8b2813..5421d82a257 100644
--- a/arch/arm/include/asm/memory.h
+++ b/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)
@@ -295,11 +302,6 @@ 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.
*/