From e1031dc1f7ba5c8724ba211062134076df292791 Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Thu, 7 May 2015 17:38:07 +0200 Subject: [PATCH] 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: Maxime Ripard Signed-off-by: Vinod Koul --- include/linux/dmaengine.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index ad419757241f..5d63acb09813 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -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; }; /** -- 2.34.1