linux-kernel - Re: ATA streaming feature support

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Message-ID: <45A0AE76.40600@garzik.org>
Date:	Sun, 07 Jan 2007 03:25:26 -0500
From:	Jeff Garzik <jeff@...zik.org>
To:	Manish Regmi <regmi.manish@...il.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: ATA streaming feature support

Manish Regmi wrote:
> Hi all,
>   First of all sorry for bringing this topic again.
> As discussed in  --> http://lkml.org/lkml/2006/5/5/47
> The ATA Streaming feature set is not necessary to be in Kernel Space
> (IDE driver). There is a suggestion creating user space library.
> 
> But how is the user space apps going to use the commands like READ
> STREAM DMA EXT (0x2A). Shouldn't there be some support in kernel which
> setups up PRD tables  and all.
> It doesn't seem to be possible.... is it?

If you pass SG_IO addresses, they become DMA scatter/gather tables.

	Jeff



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