IRQ disabled (SATA) on NForce2 and my theory

[Bob]

Bartlomiej Zolnierkiewicz wrote:

>On Monday 15 of December 2003 07:06, Bob wrote:
>
>
>>sii chips have a long history of needing to
>>hdparm off the unmask interrupt feature.
>>
>>I don't know about that chip but for
>>sii680 there is a special option "-p9"
>>for hdparm which is to say pio mode 9
>>is a special instruction in addition to
>>standard hdparm opt "-u0" turning off
>>irq unmask.
>>
>>
>
>There is no such thing as 'special option "-p9"' for sii680.
>
>
Passing PIO mode 9 to sii680 will make it do udma133 with
unmask off, same as "-X70 -u0". What sii did was to make a
bug a feature by embedding their own special pio mode for the
well-known cmdxxx unmask off requirement.

Making A Bug A Feature is begging for "deprecation".

Since -p9 was only documented to set u133 and unmask off,
making a bug a feature, non-bug features are not user-expected
to be set without using other(normal) hdparm options, so
somebody might as well "man hdparm" and bypass the silly
kludge which probably was an internal office joke anyway.

-Bob

>>/sbin/hdparm -d1 -c1 -p9 -X70 -u0 -k0 -i $a
>>
>>
>
>-X70 is only valid if your device is UDMA133.
>
>--bart
>
>
>

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[Bartlomiej Zolnierkiewicz]

On Tuesday 16 of December 2003 04:56, Bob wrote:
> Bartlomiej Zolnierkiewicz wrote:
> >On Monday 15 of December 2003 07:06, Bob wrote:
> >>sii chips have a long history of needing to
> >>hdparm off the unmask interrupt feature.
> >>
> >>I don't know about that chip but for
> >>sii680 there is a special option "-p9"
> >>for hdparm which is to say pio mode 9
> >>is a special instruction in addition to
> >>standard hdparm opt "-u0" turning off
> >>irq unmask.
> >
> >There is no such thing as 'special option "-p9"' for sii680.
>
> Passing PIO mode 9 to sii680 will make it do udma133 with
> unmask off, same as "-X70 -u0". What sii did was to make a
> bug a feature by embedding their own special pio mode for the
> well-known cmdxxx unmask off requirement.

Please point me to the code or documentation...

> Making A Bug A Feature is begging for "deprecation".
>
> Since -p9 was only documented to set u133 and unmask off,

Where is it documented?

> making a bug a feature, non-bug features are not user-expected
> to be set without using other(normal) hdparm options, so
> somebody might as well "man hdparm" and bypass the silly
> kludge which probably was an internal office joke anyway.

Are you talking about drivers/ide/pci/siimage.c driver or something else?