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Commit e1031dc1 authored by Maxime Ripard's avatar Maxime Ripard Committed by Vinod Koul
Browse files

dmaengine: Support different source and destination stride 



In interleaved mode, we can expect to have different source and destination
strides.

Add support for such case to dmaengine.

Signed-off-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 5ebe6afa

include/linux/dmaengine.h

+8 −0
Original line number Diff line number Diff line
@@ -122,10 +122,18 @@ enum dma_transfer_direction { 
 *	 chunk and before first src/dst address for next chunk.

 *	 Ignored for dst(assumed 0), if dst_inc is true and dst_sgl is false.

 *	 Ignored for src(assumed 0), if src_inc is true and src_sgl is false.

 * @dst_icg: Number of bytes to jump after last dst address of this

 *	 chunk and before the first dst address for next chunk.

 *	 Ignored if dst_inc is true and dst_sgl is false.

 * @src_icg: Number of bytes to jump after last src address of this

 *	 chunk and before the first src address for next chunk.

 *	 Ignored if src_inc is true and src_sgl is false.

 */

struct data_chunk {

	size_t size;

	size_t icg;

	size_t dst_icg;

	size_t src_icg;

};



/**