Re: Help enabling PCI interrupts on Dell/SMP and Sun/SMP systems.
From: Alan Kilian
Date: Wed Feb 23 2005 - 17:36:05 EST
> On Wed, 23 Feb 2005, Dick Johnson wrote:
>
> call pci_enable_device(dev)
> ... before you use the IRQ in dev->irq.
>
> The reported IRQ is bogus until you make that
> call. It's a reported BUG, probably won't
> ever get fixed because it's considered a
> feature.
>
> Also, make sure that your .config for the Dell looks
> something like:
>
> CONFIG_X86_IO_APIC=y
> CONFIG_X86_LOCAL_APIC=y
> CONFIG_PCI=y
> # CONFIG_PCI_GOBIOS is not set
> # CONFIG_PCI_GODIRECT is not set
> CONFIG_PCI_GOANY=y
> CONFIG_PCI_BIOS=y
> CONFIG_PCI_DIRECT=y
Dick,
Thanks for the quick reply.
1) I call pci_enable_device(dev) immediatly after I call
dev = pci_find_device(0x1492, PCI_ANY_ID, dev);
2) I have verified all the CONFIG settings you suggested.
Here is `cat /proc/interrupts` on my working dell:
CPU0
0: 16891629 XT-PIC timer
1: 10 XT-PIC i8042
2: 0 XT-PIC cascade
3: 2 XT-PIC parport0
5: 764 XT-PIC sse
7: 422 XT-PIC ohci_hcd
8: 1 XT-PIC rtc
9: 0 XT-PIC acpi
11: 35198 XT-PIC eth0
12: 66 XT-PIC i8042
14: 42769 XT-PIC ide0
15: 151569 XT-PIC ide1
NMI: 0
ERR: 0
My driver is called "sse" and is interrupting at IRQ #5
Here is `cat /proc/interrupts` on my non-working Sun:
CPU0 CPU1
0: 7302649 7417311 IO-APIC-edge timer
5: 0 0 IO-APIC-edge sse
8: 0 1 IO-APIC-edge rtc
9: 0 0 IO-APIC-level acpi
15: 1 478 IO-APIC-edge ide1
169: 0 30 IO-APIC-level aic79xx
177: 13991 18084 IO-APIC-level aic79xx
185: 0 3 IO-APIC-level ehci_hcd
193: 0 26 IO-APIC-level ohci_hcd
201: 0 21 IO-APIC-level ohci_hcd
209: 167119 87 IO-APIC-level eth0
NMI: 0 0
LOC: 14719159 14719203
ERR: 0
MIS: 0
It appears that the card is also interrupting at IRQ#5
There is an interesting message on the Sun in /var/log/messages:
Feb 23 14:01:26 sunw1200z kernel: sse: no version magic, tainting
kernel.
Feb 23 14:01:26 sunw1200z kernel: SSE: Found a DeCypher card.
Feb 23 14:01:26 sunw1200z kernel: ACPI: PCI interrupt 0000:13:03.0[A] ->
GSI 36 (level, low) -> IRQ 217
Feb 23 14:01:26 sunw1200z kernel: interrupting on line 5
Feb 23 14:01:26 sunw1200z kernel: SSE: bar[0] From 0xd2806000 to
0xd2806fff F=0x200 MEMORY space
Feb 23 14:01:26 sunw1200z kernel: SSE: bar[1] From 0xd2800000 to
0xd2801fff F=0x200 MEMORY space
Feb 23 14:01:26 sunw1200z kernel: SSE: bar[2] From 0xd2000000 to
0xd27fffff F=0x200 MEMORY space
Feb 23 14:01:26 sunw1200z kernel: SSE: bar[0] mybase = 0xf889a000 size =
0x00001000 D'4096
Feb 23 14:01:26 sunw1200z kernel: SSE: bar[1] mybase = 0xf889c000 size =
0x00002000 D'8192
Feb 23 14:01:26 sunw1200z kernel: SSE: bar[2] mybase = 0xf8b00000 size =
0x00800000 D'8388608
Feb 23 14:01:26 sunw1200z kernel: pci_alloc_consistent returned
0xf0ded000
Feb 23 14:01:26 sunw1200z kernel: sse_read_bus_buffer 0x30ded000
Feb 23 14:01:26 sunw1200z kernel: request_irq() returned 0
Feb 23 14:01:26 sunw1200z kernel: SSE device_id 3, Rev 4
Feb 23 14:01:26 sunw1200z kernel: SSE Before: intstatus = 0x00000000
Feb 23 14:01:26 sunw1200z kernel: SSE Before: intstatus = 0x00000000
Feb 23 14:01:26 sunw1200z kernel: SSE: End of card attachment. Number of
cards = 1
Feb 23 14:01:26 sunw1200z kernel: Iterating through the softp
structures...
Feb 23 14:01:26 sunw1200z kernel: Card at softp->mem_reg1 0xf889a000
minor = 0
The interesting bits seem to be these two lines:
kernel: SSE: Found a DeCypher card.
kernel: ACPI: PCI interrupt 0000:13:03.0[A] -> GSI 36 (level, low) ->
IRQ 217
The first message is in my driver after pci_find_device()
The second is from when I do pci_enable_device(dev);
Can you decode the mysterious ACPI message?
-Alan
--
- Alan Kilian <kilian(at)bobodyne.com>
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