dmaengine: axi-dmac: Allocate hardware descriptors

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Change where and how the DMA transfers meta-data is stored, to prepare
for the upcoming introduction of scatter-gather support.

Allocate hardware descriptors in the format that the HDL core will be
expecting them when the scatter-gather feature is enabled, and use these
fields to store the data that was previously stored in the axi_dmac_sg
structure.

Note that the 'x_len' and 'y_len' fields now contain the transfer length
minus one, since that's what the hardware will expect in these fields.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20231215131313.23840-3-paul@crapouillou.net
Signed-off-by: Vinod Koul <vkoul@kernel.org>

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Paul Cercueil 2023-12-15 14:13:10 +01:00 • committed by Vinod Koul

parent a2ab704538

commit 3f8fd25936

1 changed files with 88 additions and 46 deletions

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drivers/dma/dma-axi-dmac.c

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