Messages in this thread | | | From | "Charles Martin" <> | Subject | interrupts across PCI bridge(s) not handled | Date | Mon, 3 Nov 2003 09:08:27 -0700 |
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I have a pci backplane extender, with 4 cards (named piraq) in it. The cards are detected by the PCI system, and irqs 92-95 are assigned, as shown in /var/log/messages:
kernel: PCI->APIC IRQ transform: (B6,I4,P0) -> 93 kernel: PCI->APIC IRQ transform: (B6,I6,P0) -> 95 kernel: PCI->APIC IRQ transform: (B6,I7,P0) -> 92 kernel: PCI->APIC IRQ transform: (B6,I9,P0) -> 94
My driver loads happily, with succesful registering of these interrupts. However, the interrupts don't get handled properly, and /proc/interrupts shows that they have not been correctly setup:
CPU0 CPU1 0: 4946 10162 IO-APIC-edge timer 1: 53 131 IO-APIC-edge keyboard 2: 0 0 XT-PIC cascade 8: 1 0 IO-APIC-edge rtc 12: 4816 0 IO-APIC-edge PS/2 Mouse 15: 903 1 IO-APIC-edge ide1 16: 0 0 IO-APIC-level usb-uhci 18: 0 0 IO-APIC-level usb-uhci 19: 0 0 IO-APIC-level usb-uhci 20: 3 0 IO-APIC-level ohci1394 23: 0 0 IO-APIC-level ehci_hcd 24: 748 0 IO-APIC-level eth0 25: 43 0 IO-APIC-level ioc0 26: 43 0 IO-APIC-level ioc1 50: 9142 4235 IO-APIC-level ioc2 92: 0 0 none piraq 93: 0 0 none piraq 94: 0 0 none piraq 95: 0 0 none piraq NMI: 0 0 LOC: 15017 15016 ERR: 0 MIS: 0
If I boot with "noapic", the interrupts do get assigned to XT-PIC, and will trigger correctly.
Same results are seen in 2.4.22 and 2.6.0-test9.
Thanks, Charlie
N.B. System is Dell 650 w/ dual Xeons. Backplane extender is a Magma. This scheme uses a PCI interconnect card in both the Dell and the Magma, with a connecting cable.
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