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Date: Sun, 29 May 2005 14:14:34 -0400
From: Jeff Garzik <jgarzik@pobox.com>
To: Erik Slagter <erik@slagter.name>
Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org,
       Jens Axboe <axboe@suse.de>
Subject: Re: Playing with SATA NCQ
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On Sun, May 29, 2005 at 08:10:51PM +0200, Erik Slagter wrote:
> On Sun, 2005-05-29 at 14:01 -0400, Jeff Garzik wrote:
> > Erik Slagter wrote:
> > > I guess the only way to have, for example the ICH6, not using legacy
> > > IRQ/ports, is to switch it to AHCI, which only the BIOS can do (if
> > > implemented).
> > 
> > "native mode" is where PATA and/or SATA PCI device is programmed into 
> > full PCI mode -- PCI BARs, PCI irq, etc.  Some BIOSen allow you to 
> > enable mode, which disables all use of legacy IRQ/ports.
> > 
> > Also, ICH6 silicon does not support AHCI, only ICH6-R and ICH6-M.
> 
> So, I do have this laptop with ICH6-M, is there a way to get it in
> "native" mode without having to enable AHCI mode (can't do that, the
> BIOS doesn't allow it)?

Same as enabling AHCI mode -- really need a BIOS option to do that.


> I still think still using IRQ14/15 etc. is
> silly ;-)

<shrug>  IRQ14/15 are dedicated to IDE, whereas PCI irqs might be shared.
That can sometimes be faster, and/or lead to fewer problems.

	Jeff



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