Implement dma_sync_single_range_for_{cpu,device}, based on curent
implementations of dma_sync_single_for_{cpu,device}.
Signed-off-by: John W. Linville <[email protected]>
---
It is hard to use this API if common platforms do not implement it. :-)
Hopefully I did not miss something obvious?
This is a naive implementation, so flame away...
include/asm-x86_64/dma-mapping.h | 28 ++++++++++++++++++++++++++++
1 files changed, 28 insertions(+)
diff --git a/include/asm-x86_64/dma-mapping.h b/include/asm-x86_64/dma-mapping.h
--- a/include/asm-x86_64/dma-mapping.h
+++ b/include/asm-x86_64/dma-mapping.h
@@ -85,6 +85,34 @@ static inline void dma_sync_single_for_d
flush_write_buffers();
}
+static inline void dma_sync_single_range_for_cpu(struct device *hwdev,
+ dma_addr_t dma_handle,
+ unsigned long offset,
+ size_t size, int direction)
+{
+ if (direction == DMA_NONE)
+ out_of_line_bug();
+
+ if (swiotlb)
+ return swiotlb_sync_single_for_cpu(hwdev,dma_handle+offset,size,direction);
+
+ flush_write_buffers();
+}
+
+static inline void dma_sync_single_range_for_device(struct device *hwdev,
+ dma_addr_t dma_handle,
+ unsigned long offset,
+ size_t size, int direction)
+{
+ if (direction == DMA_NONE)
+ out_of_line_bug();
+
+ if (swiotlb)
+ return swiotlb_sync_single_for_device(hwdev,dma_handle+offset,size,direction);
+
+ flush_write_buffers();
+}
+
static inline void dma_sync_sg_for_cpu(struct device *hwdev,
struct scatterlist *sg,
int nelems, int direction)
--
John W. Linville
[email protected]
-
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