Re: [RFC] add DMA setup FIS auto-activate feature

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Jeff Garzik wrote:
> Tejun Heo wrote:
>> IIRC, AA is in the ahci spec from rev 1.0, so if controllers implement
> 
> AHCI?  Perhaps.   But AA is not in the _Serial ATA_ 1.0 spec...
> 
> It was added in SATA II, and the SATA II specs specifically mention that
> AA was not present in SATA 1.0.

Yeap, it wasn't in SATA 1.0 but it was in ahci 1.0 so _theoretically_
all ahcis should be fine with it.  We can introduce ATA_FLAG_FPDMA_AA
and let the drivers set it.  It would probably be better to set it
during -rc's and then disable it for release for a few devel cycles.

Thanks.

-- 
tejun
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