dmaengine: dw-edma: Remove struct dw_edma_chunk

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The current descriptor layout is:

  struct dw_edma_desc *desc
   └─ chunk list
        └─ burst[]

Creating a DMA descriptor requires at least two kzalloc() calls because
each chunk is allocated as a linked-list node. Since the number of bursts
is already known when the descriptor is created, this linked-list layer is
unnecessary.

Move the burst array directly into struct dw_edma_desc and remove the
struct dw_edma_chunk layer entirely.

Use start_burst and done_burst to track the current bursts, which current
are in the DMA link list.

Tested-by: Koichiro Den <den@valinux.co.jp>
Tested-By: Devendra Verma <devendra.verma@amd.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260713-edma_ll-v7-10-6fb7498c901e@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

...

This commit is contained in:

Frank Li 2026-07-13 13:03:28 -04:00 • committed by Vinod Koul

parent 3f3fa81cd2

commit bed94a469f

2 changed files with 63 additions and 112 deletions

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147

drivers/dma/dw-edma/dw-edma-core.c

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28

drivers/dma/dw-edma/dw-edma-core.h

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