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    SubjectRe: PCI riser cards and PCI irq routing, etc
    Lennart Sorensen wrote:
    > On Sun, Feb 18, 2007 at 05:15:30PM +0100, Udo van den Heuvel wrote:
    >> FYI: My situation is a VIA Epia EN12000 with a TranquilPC dual PCI riser
    >> where only the Device Number can be changed.
    >> The kernel sees the two DVB cards in there as:
    >>
    >> saa7146: register extension 'budget_av'.
    >> ACPI: PCI Interrupt 0000:00:13.0[A] -> GSI 16 (level, low) -> IRQ 16
    >> saa7146: found saa7146 @ mem f8c3e000 (revision 1, irq 16) (0x153b,0x1157).
    >> saa7146 (0): dma buffer size 192512
    >> DVB: registering new adapter (Terratec Cinergy 1200 DVB-T).
    >> adapter failed MAC signature check
    >> encoded MAC from EEPROM was
    >> ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff
    >> KNC1-0: MAC addr = 00:0a:ac:01:d6:87
    >> DVB: registering frontend 0 (Philips TDA10046H DVB-T)...
    >> budget-av: ci interface initialised.
    >> ACPI: PCI Interrupt 0000:00:14.0[A] -> GSI 17 (level, low) -> IRQ 20
    >> saa7146: found saa7146 @ mem f8cb2000 (revision 1, irq 20) (0x153b,0x1155).
    >> saa7146 (1): dma buffer size 192512
    >> DVB: registering new adapter (TerraTec Cinergy 1200 DVB-S).
    >> adapter failed MAC signature check
    >> encoded MAC from EEPROM was
    >> ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff
    >> sd 0:0:0:0: Attached scsi generic sg0 type 0
    >> KNC1-1: MAC addr = 00:0a:ac:12:93:8d
    >> DVB: registering frontend 1 (ST STV0299 DVB-S)...
    >> budget-av: ci interface initialised.
    >
    > Well it says they are slot 13 and 14. What other pci devices are
    > present in the system and what irq's are they using?

    lspci and interrupts at the bottom. yes, we have apic.

    >> So IRQ 16 and 20. But when using the stock 2.6.20 kernel there is no
    >> communication with the DVB-T card (the frontend), so there is no
    >> /dev/dvb/* entry. This points to an IRQ problem.
    >
    > Any documentation on that riser card?

    The EN12000 is equipped with a PCI riser like the one here:
    http://www.tranquilpc-shop.co.uk/acatalog/info%5f2%2ehtml
    Please also see
    http://www.tranquilpc-shop.co.uk/acatalog/PCI_Risers.html and
    http://www.tranquilpc.co.uk/support/Files/TPC014/Tranquil%20Riser.pdf
    for info about how the riser works.

    > I guess it is possible the card does something weird and the IRQs for
    > both cards have to actually be the same. If that is the case you could
    > make the kernel change the IRQ assigned to the second card before
    > loading the driver. Or you could do it from the boot loader or
    > something (The system I work with has a stupid bios that doesn't have a
    > clue about bridges, so we added IRQ fixup code to grub to deal with all
    > PCI bridges before booting the system).

    Ah, this sounds interesting.
    Any pointers about hwo to do this?

    >> I set the BIOS for 'PnP OS installed'. Should I change that?
    (....)
    > It might actually work better if you change that, although it may also
    > just make no difference.

    I will give the change a try.

    The info:

    00:00.0 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro
    Host Bridge
    00:00.1 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro
    Host Bridge
    00:00.2 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro
    Host Bridge
    00:00.3 Host bridge: VIA Technologies, Inc. PT890 Host Bridge
    00:00.4 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro
    Host Bridge
    00:00.7 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro
    Host Bridge
    00:01.0 PCI bridge: VIA Technologies, Inc. VT8237 PCI Bridge
    00:0d.0 FireWire (IEEE 1394): VIA Technologies, Inc. IEEE 1394 Host
    Controller (rev 80)
    00:0e.0 Ethernet controller: VIA Technologies, Inc. VT6120/VT6121/VT6122
    Gigabit Ethernet Adapter (rev 11)
    00:0f.0 IDE interface: VIA Technologies, Inc. VIA VT6420 SATA RAID
    Controller (rev 80)
    00:0f.1 IDE interface: VIA Technologies, Inc.
    VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
    00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
    Controller (rev 81)
    00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
    Controller (rev 81)
    00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
    Controller (rev 81)
    00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 86)
    00:11.0 ISA bridge: VIA Technologies, Inc. VT8237 ISA bridge
    [KT600/K8T800/K8T890 South]
    00:11.5 Multimedia audio controller: VIA Technologies, Inc.
    VT8233/A/8235/8237 AC97 Audio Controller (rev 60)
    00:13.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)
    00:14.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)
    01:00.0 VGA compatible controller: VIA Technologies, Inc. UniChrome Pro
    IGP (rev 01)

    CPU0
    0: 15939569 IO-APIC-edge timer
    1: 36 IO-APIC-edge i8042
    8: 1 IO-APIC-edge rtc
    9: 0 IO-APIC-fasteoi acpi
    12: 222 IO-APIC-edge i8042
    14: 570999 IO-APIC-edge ide0
    16: 3166202 IO-APIC-fasteoi saa7146 (0), via@pci:0000:01:00.0
    17: 2619374 IO-APIC-fasteoi eth0
    18: 402194 IO-APIC-fasteoi libata
    19: 0 IO-APIC-fasteoi uhci_hcd:usb1, uhci_hcd:usb2,
    uhci_hcd:usb3, ehci_hcd:usb4
    20: 2 IO-APIC-fasteoi saa7146 (1), ohci1394
    21: 2768193 IO-APIC-fasteoi VIA8237
    NMI: 0
    LOC: 15938827
    ERR: 0
    MIS: 0

    Kind regards,
    Udo
    -
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