1 files changed, 167 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/dma-mapping.h b/arch/blackfin/include/asm/dma-mapping.h
new file mode 100644
index 000000000..054d9ec57
--- /dev/null
+++ b/arch/blackfin/include/asm/dma-mapping.h
@@ -0,0 +1,167 @@
+/*
+ * Copyright 2004-2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef _BLACKFIN_DMA_MAPPING_H
+#define _BLACKFIN_DMA_MAPPING_H
+
+#include <asm/cacheflush.h>
+struct scatterlist;
+
+void *dma_alloc_coherent(struct device *dev, size_t size,
+			 dma_addr_t *dma_handle, gfp_t gfp);
+void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
+		       dma_addr_t dma_handle);
+
+/*
+ * Now for the API extensions over the pci_ one
+ */
+#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_supported(d, m)         (1)
+
+static inline int
+dma_set_mask(struct device *dev, u64 dma_mask)
+{
+	if (!dev->dma_mask || !dma_supported(dev, dma_mask))
+		return -EIO;
+
+	*dev->dma_mask = dma_mask;
+
+	return 0;
+}
+
+static inline int
+dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+	return 0;
+}
+
+extern void
+__dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir);
+static inline void
+__dma_sync_inline(dma_addr_t addr, size_t size, enum dma_data_direction dir)
+{
+	switch (dir) {
+	case DMA_NONE:
+		BUG();
+	case DMA_TO_DEVICE:		/* writeback only */
+		flush_dcache_range(addr, addr + size);
+		break;
+	case DMA_FROM_DEVICE: /* invalidate only */
+	case DMA_BIDIRECTIONAL: /* flush and invalidate */
+		/* Blackfin has no dedicated invalidate (it includes a flush) */
+		invalidate_dcache_range(addr, addr + size);
+		break;
+	}
+}
+static inline void
+_dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir)
+{
+	if (__builtin_constant_p(dir))
+		__dma_sync_inline(addr, size, dir);
+	else
+		__dma_sync(addr, size, dir);
+}
+
+static inline dma_addr_t
+dma_map_single(struct device *dev, void *ptr, size_t size,
+	       enum dma_data_direction dir)
+{
+	_dma_sync((dma_addr_t)ptr, size, dir);
+	return (dma_addr_t) ptr;
+}
+
+static inline dma_addr_t
+dma_map_page(struct device *dev, struct page *page,
+	     unsigned long offset, size_t size,
+	     enum dma_data_direction dir)
+{
+	return dma_map_single(dev, page_address(page) + offset, size, dir);
+}
+
+static inline void
+dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+		 enum dma_data_direction dir)
+{
+	BUG_ON(!valid_dma_direction(dir));
+}
+
+static inline void
+dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
+	       enum dma_data_direction dir)
+{
+	dma_unmap_single(dev, dma_addr, size, dir);
+}
+
+extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+		      enum dma_data_direction dir);
+
+static inline void
+dma_unmap_sg(struct device *dev, struct scatterlist *sg,
+	     int nhwentries, enum dma_data_direction dir)
+{
+	BUG_ON(!valid_dma_direction(dir));
+}
+
+static inline void
+dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t handle,
+			      unsigned long offset, size_t size,
+			      enum dma_data_direction dir)
+{
+	BUG_ON(!valid_dma_direction(dir));
+}
+
+static inline void
+dma_sync_single_range_for_device(struct device *dev, dma_addr_t handle,
+				 unsigned long offset, size_t size,
+				 enum dma_data_direction dir)
+{
+	_dma_sync(handle + offset, size, dir);
+}
+
+static inline void
+dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle, size_t size,
+			enum dma_data_direction dir)
+{
+	dma_sync_single_range_for_cpu(dev, handle, 0, 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)
+{
+	dma_sync_single_range_for_device(dev, handle, 0, size, dir);
+}
+
+static inline void
+dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nents,
+		    enum dma_data_direction dir)
+{
+	BUG_ON(!valid_dma_direction(dir));
+}
+
+extern void
+dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
+		       int nents, enum dma_data_direction dir);
+
+static inline void
+dma_cache_sync(struct device *dev, void *vaddr, size_t size,
+	       enum dma_data_direction dir)
+{
+	_dma_sync((dma_addr_t)vaddr, size, dir);
+}
+
+/* drivers/base/dma-mapping.c */
+extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
+			   void *cpu_addr, dma_addr_t dma_addr, size_t size);
+extern int dma_common_get_sgtable(struct device *dev, struct sg_table *sgt,
+				  void *cpu_addr, dma_addr_t dma_addr,
+				  size_t size);
+
+#define dma_mmap_coherent(d, v, c, h, s) dma_common_mmap(d, v, c, h, s)
+#define dma_get_sgtable(d, t, v, h, s) dma_common_get_sgtable(d, t, v, h, s)
+
+#endif				/* _BLACKFIN_DMA_MAPPING_H */