This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / asm-xtensa / dma-mapping.h

diff --git a/include/asm-xtensa/dma-mapping.h b/include/asm-xtensa/dma-mapping.h
new file mode 100644 (file)
index 0000000..c425f10
--- /dev/null
+++ b/include/asm-xtensa/dma-mapping.h
@@ -0,0 +1,182 @@
+/*
+ * include/asm-xtensa/dma_mapping.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2003 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_DMA_MAPPING_H
+#define _XTENSA_DMA_MAPPING_H
+
+#include <asm/scatterlist.h>
+#include <asm/cache.h>
+#include <asm/io.h>
+#include <linux/mm.h>
+
+/*
+ * DMA-consistent mapping functions.
+ */
+
+extern void *consistent_alloc(int, size_t, dma_addr_t, unsigned long);
+extern void consistent_free(void*, size_t, dma_addr_t);
+extern void consistent_sync(void*, size_t, int);
+
+#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)
+
+void *dma_alloc_coherent(struct device *dev, size_t size,
+                          dma_addr_t *dma_handle, gfp_t flag);
+
+void dma_free_coherent(struct device *dev, size_t size,
+                        void *vaddr, dma_addr_t dma_handle);
+
+static inline dma_addr_t
+dma_map_single(struct device *dev, void *ptr, size_t size,
+              enum dma_data_direction direction)
+{
+       BUG_ON(direction == DMA_NONE);
+       consistent_sync(ptr, size, direction);
+       return virt_to_phys(ptr);
+}
+
+static inline void
+dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+                enum dma_data_direction direction)
+{
+       BUG_ON(direction == DMA_NONE);
+}
+
+static inline int
+dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+          enum dma_data_direction direction)
+{
+       int i;
+
+       BUG_ON(direction == DMA_NONE);
+
+       for (i = 0; i < nents; i++, sg++ ) {
+               BUG_ON(!sg->page);
+
+               sg->dma_address = page_to_phys(sg->page) + sg->offset;
+               consistent_sync(page_address(sg->page) + sg->offset,
+                               sg->length, direction);
+       }
+
+       return nents;
+}
+
+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)
+{
+       BUG_ON(direction == DMA_NONE);
+       return (dma_addr_t)(page_to_pfn(page)) * PAGE_SIZE + offset;
+}
+
+static inline void
+dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
+              enum dma_data_direction direction)
+{
+       BUG_ON(direction == DMA_NONE);
+}
+
+
+static inline void
+dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
+            enum dma_data_direction direction)
+{
+       BUG_ON(direction == DMA_NONE);
+}
+
+static inline void
+dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
+               enum dma_data_direction direction)
+{
+       consistent_sync((void *)bus_to_virt(dma_handle), size, direction);
+}
+
+static inline void
+dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
+               enum dma_data_direction direction)
+{
+       consistent_sync((void *)bus_to_virt(dma_handle), size, direction);
+}
+
+static inline void
+dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
+                     unsigned long offset, size_t size,
+                     enum dma_data_direction direction)
+{
+
+       consistent_sync((void *)bus_to_virt(dma_handle)+offset,size,direction);
+}
+
+static inline void
+dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
+                     unsigned long offset, size_t size,
+                     enum dma_data_direction direction)
+{
+
+       consistent_sync((void *)bus_to_virt(dma_handle)+offset,size,direction);
+}
+static inline void
+dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
+                enum dma_data_direction dir)
+{
+       int i;
+       for (i = 0; i < nelems; i++, sg++)
+               consistent_sync(page_address(sg->page) + sg->offset,
+                               sg->length, dir);
+}
+
+static inline void
+dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
+                enum dma_data_direction dir)
+{
+       int i;
+       for (i = 0; i < nelems; i++, sg++)
+               consistent_sync(page_address(sg->page) + sg->offset,
+                               sg->length, dir);
+}
+static inline int
+dma_mapping_error(dma_addr_t dma_addr)
+{
+       return 0;
+}
+
+static inline int
+dma_supported(struct device *dev, u64 mask)
+{
+       return 1;
+}
+
+static inline int
+dma_set_mask(struct device *dev, u64 mask)
+{
+       if(!dev->dma_mask || !dma_supported(dev, mask))
+               return -EIO;
+
+       *dev->dma_mask = mask;
+
+       return 0;
+}
+
+static inline int
+dma_get_cache_alignment(void)
+{
+       return L1_CACHE_BYTES;
+}
+
+#define dma_is_consistent(d)   (1)
+
+static inline void
+dma_cache_sync(void *vaddr, size_t size,
+              enum dma_data_direction direction)
+{
+       consistent_sync(vaddr, size, direction);
+}
+
+#endif /* _XTENSA_DMA_MAPPING_H */