linux DMA capabilities in MV64460

Adrian Cox adrian at
Thu Mar 9 09:36:18 EST 2006

On Mon, 2006-03-06 at 14:39 +1030, Phil Nitschke wrote:
> How is a DMA controlled (from a device driver writer's perspective) when
> a third-party (i.e. in the bridge) DMA controller needs to do the work
> to get the data from a PCI Target into main memory?
> What kernel API should be provided by the DMA Controller Driver?  

There is no current API for this in the kernel, but there are some
proposals. From Intel, we have I/OAT, which targets network operations:

There's some overlap with the ADMA feature set, which is intended to
accelerate RAID operations:

Adrian Cox <adrian at>

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