[Xen-users] Xen 4.0.1 PCI passthrough help

[Mark Adams <mark@xxxxxxxxxxxxxxxxxx>]

Hi all,

Debian squeeze 2.6.32-5 with Xen 4.0

I'm having some issues getting PCI passthrough to work for a quad port
Gigabit NIC card. I've added the devices and they are not visible in
dom0, however when the domU boots up all I get is the following:

[    0.644428] Intel(R) Gigabit Ethernet Network Driver - version 1.0.8-k2
[    0.644433] Copyright (c) 2008 Intel Corporation.
[    0.644838] PCI: Setting latency timer of device 0000:00:00.0 to 64
[    0.655956] igb: probe of 0000:00:00.0 failed with error -2

lspci shows the following in the domU:

00:00.0 Ethernet controller: Intel Corporation Device 10c9 (rev 01)
        Subsystem: Intel Corporation Device 0000
        Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
        Interrupt: pin A routed to IRQ 26
        Region 0: Memory at fae60000 (32-bit, non-prefetchable) [size=128K]
        Region 2: I/O ports at d880 [size=32]
        Region 3: Memory at fae5c000 (32-bit, non-prefetchable) [size=16K]
        Capabilities: [40] Power Management version 3
                Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=1 PME-
        Capabilities: [50] Message Signalled Interrupts: Mask+ 64bit+ Queue=0/0 
Enable-
                Address: 0000000000000000  Data: 0000
                Masking: 00000000  Pending: 00000000
        Capabilities: [70] MSI-X: Enable- Mask- TabSize=10
                Vector table: BAR=3 offset=00000000
                PBA: BAR=3 offset=00002000
        Capabilities: [a0] Express (v2) Endpoint, MSI 00
                DevCap: MaxPayload 512 bytes, PhantFunc 0, Latency L0s <4us, L1 
<64us
                        ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset+
                DevCtl: Report errors: Correctable- Non-Fatal- Fatal- 
Unsupported-
                        RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+ FLReset-
                        MaxPayload 128 bytes, MaxReadReq 512 bytes
                DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- 
TransPend-
                LnkCap: Port #4, Speed 2.5GT/s, Width x4, ASPM L0s L1, Latency 
L0 <2us, L1 <64us
                        ClockPM- Suprise- LLActRep- BwNot-
                LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+
                        ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
                LnkSta: Speed 2.5GT/s, Width x4, TrErr- Train- SlotClk+ 
DLActive- BWMgmt- ABWMgmt-
        Capabilities: [100] Advanced Error Reporting <?>
        Capabilities: [150] #0e
        Capabilities: [160] #10
        Kernel modules: igb


Does anyone have any ideas what I might be doing wrong or how I can debug this 
further?

Best Regards,
Mark

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