IRQ-Routing Problems (ShowStopper)
jhb at FreeBSD.org
Mon Jun 7 12:10:13 GMT 2004
On Saturday 05 June 2004 03:20 pm, Dan Nelson wrote:
> In the last episode (Jun 05), Matthias Schuendehuette said:
> > I have still IRQ-Problems on my machine which seem to be ACPI related
> > (i.e. which don't occur without ACPI) but seem to have a different
> > source than the last shutdown/reboot issue.
> > The last working kernel is from May 22, after the new ACPI-Code no
> > kernel boots with ACPI enabled any more.
> > The core problem is the handling of IRQ 10 on my machine. This IRQ is
> > marked as 'Legacy/ISA' in my BIOS-Settings and is used for my ISA
> > "Teles S0/16.3"-ISDN-Card.
> I'm having similar problems with IRQs. I haven't reserved any IRQs in
> my BIOS (no ISA cards), but with ACPI enabled, my SCSI card doesn't
> seem to be getting interrupts, and my soundcard gets probed as pcm2
> instead of pcm0.
> --- /tmp/dmesg.noacpi
> +++ /tmp/dmesg.acpi
> -$PIR: 0:7 INTD routed to irq 9
> -$PIR: 0:11 INTA routed to irq 3
> -$PIR: 0:13 INTA routed to irq 11
> -$PIR: 0:14 INTA routed to irq 9
> -$PIR: 1:0 INTA routed to irq 11
> +pcib0: slot 7 INTD is routed to irq 5
> +pcib0: slot 11 INTA is routed to irq 11
> +pcib0: slot 13 INTA is routed to irq 10
> +pcib0: slot 14 INTA is routed to irq 9
> +pcib0: slot 1 INTA is routed to irq 10
> +pcib1: slot 0 INTA is routed to irq 10
> Full dmesgs attached.
ACPI's pci_link driver doesn't use the same algorithm as the $PIR code (i.e.,
only use known-good IRQs that the BIOS has already used). I am working on
updating the pci_link code to do that which should fix problems with ACPI IRQ
routing when not using APIC.
John Baldwin <jhb at FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve" = http://www.FreeBSD.org
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