problems with PRT and PCI routing table

["Holger W." <info-IGm5bqYn3xwb1SvskN2V4Q@public.gmane.org>]

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Hi everybody,

I've got some serious problems with ACPI and the IRQ mapping for my devices. (look at my
postings "mpparse.c APIC/ACPI support" and "APIC, USB mouse and errors").
It seems that not all devices get the IRQs they should regarding the PRT table. I've verified it
and it seems that the table is all right (attachment "PRT_table.txt"). Especially the devices
00:00:10, 00:00:11 and 00:00:12 which point to "\_SB_.PCI0.ALKx[0]" (x=A..D) don't get the
interrupts they should regarding the table.

There's perhaps a problem in "acpi_pci_link_add" (pci_link.c), because the function returns ...

<4>ACPI: PCI Interrupt Link [ALKA] (IRQs 20, disabled)
<4>ACPI: PCI Interrupt Link [ALKB] (IRQs 21, disabled)
<4>ACPI: PCI Interrupt Link [ALKC] (IRQs 22, disabled)
<4>ACPI: PCI Interrupt Link [ALKD] (IRQs 23, disabled)

... or "acpi_pci_link_get_current" (pci_link.c) has got a problem ? ...

<4>pci_link-0252 [18] acpi_pci_link_get_curr: No IRQ resource found
<4>pci_link-0252 [20] acpi_pci_link_get_curr: No IRQ resource found
<4>pci_link-0252 [22] acpi_pci_link_get_curr: No IRQ resource found
<4>pci_link-0252 [24] acpi_pci_link_get_curr: No IRQ resource found

I don't know which function I should "blame" - I only know that everything works fine for LNKA-D
but not for ALKA-D:

<4>ACPI: PCI Interrupt Link [LNKA] (IRQs 1 3 4 5 6 7 10 *11 12 14 15)
<4>ACPI: PCI Interrupt Link [LNKB] (IRQs 1 3 4 5 6 7 *10 11 12 14 15)
<4>ACPI: PCI Interrupt Link [LNKC] (IRQs 1 3 4 5 6 7 10 11 *12 14 15)
<4>ACPI: PCI Interrupt Link [LNKD] (IRQs 1 3 4 5 6 7 10 11 12 *14 15)

So this causes a lot of linked errors. First of all I get a lot of "<7>Pin 2-xx already
programmed" (mp_parse_prt / mpparse.c) messages. Next, "acpi_pci_irq_lookup" (pci_irq.c) fails
because it can't find the PRT entries and "acpi_pci_link_get_irq", "acpi_pci_irq_lookup" and
"acpi_pci_irq_derive" also fail.
And finally "eisa_set_level_irq" is not called in "acpi_pci_irq_enable" which results in
non-functional devices which require a "level" trigger mode.

So could one of the hardware experts pleeeeease help me ???

MANY MANY MANY THANKS in advance,

HOLGER W.

P.S.: if you need more information about my boot messages or sth. similar - feel free to ask for
it !!!

[-- Attachment #2: PRT_table.txt --]
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<7>ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
<4>PRT entry:   00:00:08[A] -> [16]
<4>PRT entry:   00:00:08[B] -> [17]
<4>PRT entry:   00:00:08[C] -> [18]
<4>PRT entry:   00:00:08[D] -> [19]
<4>PRT entry:   00:00:09[A] -> [17]
<4>PRT entry:   00:00:09[B] -> [18]
<4>PRT entry:   00:00:09[C] -> [19]
<4>PRT entry:   00:00:09[D] -> [16]
<4>PRT entry:   00:00:0A[A] -> [18]
<4>PRT entry:   00:00:0A[B] -> [19]
<4>PRT entry:   00:00:0A[C] -> [16]
<4>PRT entry:   00:00:0A[D] -> [17]
<4>PRT entry:   00:00:0B[A] -> [19]
<4>PRT entry:   00:00:0B[B] -> [16]
<4>PRT entry:   00:00:0B[C] -> [17]
<4>PRT entry:   00:00:0B[D] -> [18]
<4>PRT entry:   00:00:0C[A] -> [18]
<4>PRT entry:   00:00:0C[B] -> [19]
<4>PRT entry:   00:00:0C[C] -> [16]
<4>PRT entry:   00:00:0C[D] -> [17]
<4>PRT entry:   00:00:0D[A] -> [19]
<4>PRT entry:   00:00:0D[B] -> [16]
<4>PRT entry:   00:00:0D[C] -> [17]
<4>PRT entry:   00:00:0D[D] -> [18]
<4>PRT entry:   00:00:0E[A] -> [17]
<4>PRT entry:   00:00:0E[B] -> [18]
<4>PRT entry:   00:00:0E[C] -> [19]
<4>PRT entry:   00:00:0E[D] -> [16]
<4>PRT entry:   00:00:10[A] -> \_SB_.PCI0.ALKB[0]
<4>PRT entry:   00:00:10[B] -> \_SB_.PCI0.ALKB[0]
<4>PRT entry:   00:00:10[C] -> \_SB_.PCI0.ALKB[0]
<4>PRT entry:   00:00:10[D] -> \_SB_.PCI0.ALKB[0]
<4>PRT entry:   00:00:11[A] -> \_SB_.PCI0.ALKA[0]
<4>PRT entry:   00:00:11[B] -> \_SB_.PCI0.ALKB[0]
<4>PRT entry:   00:00:11[C] -> \_SB_.PCI0.ALKC[0]
<4>PRT entry:   00:00:11[D] -> \_SB_.PCI0.ALKD[0]
<4>PRT entry:   00:00:01[A] -> [16]
<4>PRT entry:   00:00:01[B] -> [17]
<4>PRT entry:   00:00:01[C] -> [18]
<4>PRT entry:   00:00:01[D] -> [19]
<4>PRT entry:   00:00:12[A] -> \_SB_.PCI0.ALKD[0]
<4>PRT entry:   00:00:12[B] -> \_SB_.PCI0.ALKD[0]
<4>PRT entry:   00:00:12[C] -> \_SB_.PCI0.ALKD[0]
<4>PRT entry:   00:00:12[D] -> \_SB_.PCI0.ALKD[0]