From: Tejun Heo <tj@kernel.org>
To: Jeff Garzik <jgarzik@pobox.com>
Cc: Shaohua Li <shaohua.li@intel.com>, linux-ide <linux-ide@vger.kernel.org>
Subject: Re: [RFC] add DMA setup FIS auto-activate feature
Date: Thu, 23 Jul 2009 15:12:38 +0900 [thread overview]
Message-ID: <4A67FF56.5040708@kernel.org> (raw)
In-Reply-To: <4A67FE1A.1050408@pobox.com>
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
next prev parent reply other threads:[~2009-07-23 6:12 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-23 3:45 [RFC] add DMA setup FIS auto-activate feature Shaohua Li
2009-07-23 3:50 ` Tejun Heo
2009-07-23 3:59 ` Jeff Garzik
2009-07-23 5:40 ` Shaohua Li
2009-07-23 5:45 ` Tejun Heo
2009-07-23 6:07 ` Jeff Garzik
2009-07-23 6:12 ` Tejun Heo [this message]
2009-07-23 6:48 ` Jeff Garzik
2009-07-23 7:25 ` Shaohua Li
2009-07-23 18:07 ` Robert Hancock
2009-07-23 18:11 ` Jeff Garzik
2009-07-23 20:52 ` Tejun Heo
2009-07-24 9:12 ` Shaohua Li
2009-07-25 0:47 ` Tejun Heo
2009-07-27 1:24 ` Shaohua Li
2009-07-27 1:31 ` Tejun Heo
2009-07-29 1:20 ` Jeff Garzik
2009-07-23 6:18 ` Robert Hancock
2009-07-23 9:55 ` Sergei Shtylyov
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