linux-kernel - Re: ATA streaming feature support

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Message-ID: <652016d30701090248y65b3ddd9rad2bb8869d56f90d@mail.gmail.com>
Date:	Tue, 9 Jan 2007 16:33:51 +0545
From:	"Manish Regmi" <regmi.manish@...il.com>
To:	"Jeff Garzik" <jeff@...zik.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: ATA streaming feature support

On 1/7/07, Jeff Garzik <jeff@...zik.org> wrote:
> 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

Thank you for your answer.

But what about PATA disks. Is that ioctl supported in PATA disk?
I tried to give IDENTIFY command but it failed with invalid argument.

Regards
Manish Regmi
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