X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-arm%2Fdma-mapping.h;h=925d016dd4b51ecf21fdc8a28d6f9532472d73de;hb=6a77f38946aaee1cd85eeec6cf4229b204c15071;hp=011c539c7449bc0dc243db2e816dcf55ad0c9225;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git

diff --git a/include/asm-arm/dma-mapping.h b/include/asm-arm/dma-mapping.h
index 011c539c7..925d016dd 100644
--- a/include/asm-arm/dma-mapping.h
+++ b/include/asm-arm/dma-mapping.h
@@ -86,6 +86,22 @@ extern void
 dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
 		  dma_addr_t handle);
 
+/**
+ * dma_mmap_coherent - map a coherent DMA allocation into user space
+ * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
+ * @vma: vm_area_struct describing requested user mapping
+ * @cpu_addr: kernel CPU-view address returned from dma_alloc_coherent
+ * @handle: device-view address returned from dma_alloc_coherent
+ * @size: size of memory originally requested in dma_alloc_coherent
+ *
+ * Map a coherent DMA buffer previously allocated by dma_alloc_coherent
+ * into user space.  The coherent DMA buffer must not be freed by the
+ * driver until the user space mapping has been released.
+ */
+int dma_mmap_coherent(struct device *dev, struct vm_area_struct *vma,
+		      void *cpu_addr, dma_addr_t handle, size_t size);
+
+
 /**
  * dma_alloc_writecombine - allocate writecombining memory for DMA
  * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
@@ -103,6 +119,9 @@ dma_alloc_writecombine(struct device *dev, size_t size, dma_addr_t *handle, int
 #define dma_free_writecombine(dev,size,cpu_addr,handle) \
 	dma_free_coherent(dev,size,cpu_addr,handle)
 
+int dma_mmap_writecombine(struct device *dev, struct vm_area_struct *vma,
+			  void *cpu_addr, dma_addr_t handle, size_t size);
+
 
 /**
  * dma_map_single - map a single buffer for streaming DMA
@@ -124,7 +143,7 @@ dma_map_single(struct device *dev, void *cpu_addr, size_t size,
 	       enum dma_data_direction dir)
 {
 	consistent_sync(cpu_addr, size, dir);
-	return __virt_to_bus((unsigned long)cpu_addr);
+	return virt_to_dma(dev, (unsigned long)cpu_addr);
 }
 #else
 extern dma_addr_t dma_map_single(struct device *,void *, size_t, enum dma_data_direction);
@@ -231,7 +250,7 @@ dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
 	for (i = 0; i < nents; i++, sg++) {
 		char *virt;
 
-		sg->dma_address = page_to_bus(sg->page) + sg->offset;
+		sg->dma_address = page_to_dma(dev, sg->page) + sg->offset;
 		virt = page_address(sg->page) + sg->offset;
 		consistent_sync(virt, sg->length, dir);
 	}
@@ -288,14 +307,14 @@ static inline void
 dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle, size_t size,
 			enum dma_data_direction dir)
 {
-	consistent_sync((void *)__bus_to_virt(handle), size, dir);
+	consistent_sync((void *)dma_to_virt(dev, handle), size, dir);
 }
 
 static inline void
 dma_sync_single_for_device(struct device *dev, dma_addr_t handle, size_t size,
 			   enum dma_data_direction dir)
 {
-	consistent_sync((void *)__bus_to_virt(handle), size, dir);
+	consistent_sync((void *)dma_to_virt(dev, handle), size, dir);
 }
 #else
 extern void dma_sync_single_for_cpu(struct device*, dma_addr_t, size_t, enum dma_data_direction);