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-rw-r--r--arch/powerpc/kernel/dma.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/dma.c b/arch/powerpc/kernel/dma.c
index 3a6eaa876ee..1c5c8a6fc12 100644
--- a/arch/powerpc/kernel/dma.c
+++ b/arch/powerpc/kernel/dma.c
@@ -120,6 +120,26 @@ static inline void dma_direct_unmap_page(struct device *dev,
{
}
+#ifdef CONFIG_NOT_COHERENT_CACHE
+static inline void dma_direct_sync_sg(struct device *dev,
+ struct scatterlist *sgl, int nents,
+ enum dma_data_direction direction)
+{
+ struct scatterlist *sg;
+ int i;
+
+ for_each_sg(sgl, sg, nents, i)
+ __dma_sync_page(sg_page(sg), sg->offset, sg->length, direction);
+}
+
+static inline void dma_direct_sync_single_range(struct device *dev,
+ dma_addr_t dma_handle, unsigned long offset, size_t size,
+ enum dma_data_direction direction)
+{
+ __dma_sync(bus_to_virt(dma_handle+offset), size, direction);
+}
+#endif
+
struct dma_mapping_ops dma_direct_ops = {
.alloc_coherent = dma_direct_alloc_coherent,
.free_coherent = dma_direct_free_coherent,
@@ -128,5 +148,11 @@ struct dma_mapping_ops dma_direct_ops = {
.dma_supported = dma_direct_dma_supported,
.map_page = dma_direct_map_page,
.unmap_page = dma_direct_unmap_page,
+#ifdef CONFIG_NOT_COHERENT_CACHE
+ .sync_single_range_for_cpu = dma_direct_sync_single_range,
+ .sync_single_range_for_device = dma_direct_sync_single_range,
+ .sync_sg_for_cpu = dma_direct_sync_sg,
+ .sync_sg_for_device = dma_direct_sync_sg,
+#endif
};
EXPORT_SYMBOL(dma_direct_ops);