[Xen-users] issue with sriov

[Ashok Anand <ashok.anand@xxxxxxxxx>]

I am trying to setup SRIOV, on xen 4.0 with debian for ixgbe links, and having issue. 

I first got this message, the virtual device is up but it does not send/receive anything

-pciback: vpci: 0000:0f:10.0: assign to virtual slot 0

[ 5845.667153] pciback 0000:0f:10.0: Driver tried to write to a read-only configuration space field at offset 0x72, size 2. This may be harmless, but if you have problems with your device:

[ 5845.667155] 1) see permissive attribute in sysfs

[ 5845.667156] 2) report problems to the xen-devel mailing list along with details of your device obtained from lspci.

then I followed http://technical.bestgrid.org/index.php/Xen:_assigning_PCI_devices_to_a_domain 

to change pci permssions, 

now pci permission message goes away, but now i get the message below

[14580.450249] xen-pciback: vpci: 0000:0f:10.0: assign to virtual slot 0

[14580.469992] pciback 0000:0f:10.0: enabling device (0000 -> 0002)

[14611.960465] ixgbe 0000:0f:00.0: eth2: Set MAC msg received from VF 0

[14611.979470] ixgbe 0000:0f:00.0: eth2: VF 0 Hung DMA

and I am still not able to use device, even if device says it is up. seems like VF driver is hung, - i am wondering if there is any way to fix it. 

I used the following fix in  /etc/xen/xend-pci-quirks.sxp

(ixgbe

  (pci_ids

    ('8086:10ed'

    )

  )

  (pci_config_space_fields

    ('00000072:2:00000000' #reported by pci

    )

  )

)

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