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Date:      Wed, 17 Nov 2004 17:41:46 +0200
From:      Ruslan Ermilov <ru@FreeBSD.org>
To:        John Baldwin <jhb@FreeBSD.org>
Cc:        scottl@FreeBSD.org
Subject:   Re: New ACPI PCI Link Routing code
Message-ID:  <20041117154146.GD25995@ip.net.ua>
In-Reply-To: <200411161339.13818.jhb@FreeBSD.org>
References:  <200411111737.00537.jhb@FreeBSD.org> <200411161339.13818.jhb@FreeBSD.org>

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On Tue, Nov 16, 2004 at 01:39:13PM -0500, John Baldwin wrote:
> On Thursday 11 November 2004 05:37 pm, John Baldwin wrote:
> > I've done some work on the ACPI PCI link code to make it a bit more like
> > $PIR in that it is link centric and uses actual new-bus devices for each
> > device link.  One benefit of this is that unused links will be disabled=
 now
> > which might help with interrupt aliasing problems on machines using API=
Cs.=20
> > Also, instead of routing IRQs for links via PCI device numbers using
> > tunables, they are now routed via the link name ala $PIR.  Thus, one us=
es
> > 'hw.pci.link.LNKA.irq=3DX' to route LNKA to IRQ X.  Also, when choosing=
 a
> > virgin interrupt, we no longer try to guess at which IRQs might be used=
 by
> > ISA devices.  Instead, we only use known-good IRQs including IRQs that =
the
> > BIOS has already used and the SCI if the link is being routed via ISA I=
RQs.
> > The patch is at http://www.FreeBSD.org/~jhb/patches/acpi_pci_link.patch
> > Please test and let me know if there are any problems, thanks.
>=20
> I've updated this to the latest current and verified that it compiles ok=
=20
> (since I had at least one report that it didn't patch cleanly and/or=20
> compile).  I plan to commit this in a couple of days unless I hear some s=
ort=20
> of negative feedback.
>=20
I get a panic on boot with this change.  I don't have a serial
console attached to this notebook, but if needs be it can be
arranged (tomorrow).  The panic I get is as follows:

panic: Assertion resource->Data.Irq.NumberOfInterrupts =3D=3D 1 failed at .=
=2E./acpi_pci_link.c:497


Cheers,
--=20
Ruslan Ermilov
ru@FreeBSD.org
FreeBSD committer

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