unicore32 core architecture: mm related: consistent device DMA handling

This patch implements consistent device DMA handling of memory management.
DMA device operations are also here.

Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 34 insertions, 0 deletions

diff --git a/arch/unicore32/mm/dma-swiotlb.c b/arch/unicore32/mm/dma-swiotlb.c
new file mode 100644
index 000000000000..bfa9fbb2bbb1
--- /dev/null
+++ b/arch/unicore32/mm/dma-swiotlb.c
@@ -0,0 +1,34 @@
+/*
+ * Contains routines needed to support swiotlb for UniCore32.
+ *
+ * Copyright (C) 2010 Guan Xuetao
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+#include <linux/pci.h>
+#include <linux/cache.h>
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include <linux/swiotlb.h>
+#include <linux/bootmem.h>
+
+#include <asm/dma.h>
+
+struct dma_map_ops swiotlb_dma_map_ops = {
+        .alloc_coherent = swiotlb_alloc_coherent,
+        .free_coherent = swiotlb_free_coherent,
+        .map_sg = swiotlb_map_sg_attrs,
+        .unmap_sg = swiotlb_unmap_sg_attrs,
+        .dma_supported = swiotlb_dma_supported,
+        .map_page = swiotlb_map_page,
+        .unmap_page = swiotlb_unmap_page,
+        .sync_single_for_cpu = swiotlb_sync_single_for_cpu,
+        .sync_single_for_device = swiotlb_sync_single_for_device,
+        .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
+        .sync_sg_for_device = swiotlb_sync_sg_for_device,
+        .mapping_error = swiotlb_dma_mapping_error,
+};
+EXPORT_SYMBOL(swiotlb_dma_map_ops);