Subject: Re: Intel SATA RAID
To: Jason Thorpe <>
From: Manuel Bouyer <>
List: tech-kern
Date: 12/06/2003 23:35:41
On Sat, Dec 06, 2003 at 02:31:11PM -0800, Jason Thorpe wrote:
> On Dec 6, 2003, at 2:16 PM, Manuel Bouyer wrote:
> >On Sat, Dec 06, 2003 at 11:20:15AM -0800, Jason Thorpe wrote:
> >>I don't think this patch is correct, for a couple of reasons:
> >>
> >>	* Do you know if this SATA controller is actually based on the
> >>	  i31244 SATA chip (Artisea)?  If it is not, then you should not
> >>	  be using artisea_chip_map.
> >
> >>From the ICH5/5R datasheet, the registers are the same for 82801EB 
> >>and ER,
> >and 82801EB is already using artisea_chip_map().
> That's probably incorrect for anything other than the i31244 to be 
> using artisea_chip_map().  i31244 has another mode called "DPA mode" 
> which uses a much different register layout than traditional PCI IDE, 
> and artisea_chip_map() will be changed to support that mode one day.  
> Also, the i31244 has LED setup (that our driver doesn't currently do) 
> that will not be shared by the ICH SATA controllers.
> I suggest instead that you create an "ichsata_chip_map" to handle the 
> ICH SATA controllers.  It is simply wrong to use artisea_chip_map() for 
> them.

OK, will do.

> >Note that I didn't commit this part, I assumed it was a left over from 
> >an
> >attempt to make it work with piixide_chip_map instead of 
> >artisea_chip_map
> >
> >The parallel IDE controller on the ICH5/5R are identical (and use the
> >same device ID).
> You mean it is impossible to distinguish between the ICH5 SATA and PATA 
> controllers?  Wow, that's incredibly broken.

No, I mean it's impossible to distinguish between the ICH5 PATA and
ICH5R PATA, but that's not a problem.
I didn't look at other functions, but I think the only difference between
ICH5 and ICH5R if the SATA controller.

Manuel Bouyer <>
     NetBSD: 24 ans d'experience feront toujours la difference