MIPS: Alchemy: fix dbdma2

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[ Upstream commit 2d645604f6 ]

Various fixes for the Au1200/Au1550/Au1300 DBDMA2 code:

- skip cache invalidation if chip has working coherency circuitry.
- invalidate KSEG0-portion of the (physical) data address.
- force the dma channel doorbell write out to bus immediately with
  a sync.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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This commit is contained in:

Manuel Lauss 2023-05-11 17:30:10 +02:00 • committed by Greg Kroah-Hartman

parent 34dd1a90ab

commit dd035c08ee

1 changed files with 15 additions and 12 deletions

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arch/mips/alchemy/common/dbdma.c

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