Hi,
I've two PCI devices for which I'm making RTDM drivers.
I can load the first without any problem.
but when the second driver call rtdm_irq_request (passing the struct
pci_dev->irq field and flag RTDM_IRQTYPE_SHARED), it failed with EBUSY :
The IRQ line is already in use.
lspci before the insmod give that result :
I can see that IRQ for thoses devices are 11 and 11
04:08.0 Class 0680: Device 10b5:9080 (rev 03)
Subsystem: Device 10b5:2402
Flags: bus master, medium devsel, latency 64, IRQ 11
Memory at e0801000 (32-bit, non-prefetchable) [size=256]
I/O ports at d000 [size=256]
Memory at e0800000 (32-bit, non-prefetchable) [size=256]
06:00.0 Class 0680: Device 10e3:0148 (rev 01)
Subsystem: Device 1775:7866
Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 11
Memory at c0000000 (64-bit, non-prefetchable) [size=4K]
Capabilities: [40] PCI-X non-bridge device
when I insmod the modules, the call to pci_enable_device print this for the
first device
pci 0000:05:00.0: using bridge 0000:00:1c.0 INT A to get IRQ 16
rtdm_tsi148 0000:06:00.0: PCI->APIC IRQ transform: INT A -> IRQ 16
and this for the second
rtdm_16aio 0000:02:08.0: using bridge 0000:01:00.0 INT A to get IRQ 16
rtdm_16aio 0000:02:08.0: PCI->APIC IRQ transform: INT A -> IRQ 16
If I understand, IRQ are remapped by APIC but sadly on the same IRQ again.
Is there any way to change affected IRQ lines ?
is it a hardware specific problem ?
The devices seem to not support MSI.
They seem to be unable to share interrupt too.
I run linux 3.16.7 with Xenomai 3 rc5
I'm not sure if it's a linux problem or xenomai specific ?
Thank You for your help.
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