linux-kernel - Re: [2.6 patch] select ATA

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Message-ID: <481080EA.7010107@ru.mvista.com>
Date:	Thu, 24 Apr 2008 16:45:30 +0400
From:	Sergei Shtylyov <sshtylyov@...mvista.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Tejun Heo <htejun@...il.com>, Jeff Garzik <jeff@...zik.org>,
	Adrian Bunk <bunk@...nel.org>, linux-kernel@...r.kernel.org,
	linux-ide@...r.kernel.org
Subject: Re: [2.6 patch] select ATA_SFF

Alan Cox wrote:

>>Sergei Shtylyov wrote:

>>>>>   Jeff, Tejun, what "sff" in the file name actually means? Isn't it 
>>>>>strange that the drivers lacking DMA support or not really compliant 
>>>>>with SFF-8038i have to link with this file?

>>>>Maybe it should be libata-tf and libata-bmdma, but sff (sans bmdma)
>>>>and bmdma is acceptable, hopefully, right?

>>>   What's sff sans bmdma?

>>Supposed to be TF interface.  IIRC, the SFF term was first from Alan 
>>although it's entirely possible that I misunderstood it and used it in 
>>the wrong way.  Alan, can you please clear up the confusion?

> The SFF/Intel spec is for PCI IDE (BMDMA or otherwise), so it covers and
> defines all the common bits of the IDE interface on PCI (and in defining
> the legacy interface conveniently documents the extended ST-412 interface
> used by ATA and "pre-ATA" IDE/EIDE controllers).

    If you mean SFF-8038i (which can indeed be named "SFF/Intel"), it
documents *only* BMDMA.  If you mean something else, please be more precise.

> Alan

WBR, Sergei

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