[dpdk-users] Probing fails upon trying to bind all QAT VFs to igb_uio kernel driver on VM

[Chinmaya Dwibedy]

Hi,

We have installed openstack-mitaka release on CentO7 system. It has two
Intel QAT devices. There are 32 VF devices available
per QAT Device/DH895xCC device.  I have assigned 4 QAT VFs to VM instance
(Wind River Linux).

On VM,

1)  The # lspci -vvd: 443 command confirms that, these QAT VFs are not used
by any kernel driver.

2)  The #lsmod | grep qa also says that, no QAT driver is loaded.

Did #echo "8086 0443" > /sys/bus/pci/drivers/igb_uio/new_id to bind all the
available 4 VFs to the DPDK UIO driver. Thereafter triggered #lspci -vvd:
443 and found that none of the QAT VFs  are bound to  igb_uio kernel
driver. The system log (#dmesg) shows that, probe failed for these devices.

Can anyone please suggest what might be the underlying issue and its
solution? Thank you in advance for your support and time.

root at Local:/opt# dmesg -c

 [ 1979.178546] igb_uio: probe of 0000:00:06.0 failed with error -2

[ 1979.181698] igb_uio: probe of 0000:00:07.0 failed with error -2

[ 1979.184850] igb_uio: probe of 0000:00:08.0 failed with error -2

[ 1979.187997] igb_uio: probe of 0000:00:09.0 failed with error -2

root at Local:/opt#

root at Local:/opt# lspci -vvd:443

00:06.0 Co-processor: Intel Corporation DH895XCC Series QAT Virtual Function

        Subsystem: Intel Corporation Device 0000

        Physical Slot: 6

        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-

        Region 0: Memory at febd7000 (64-bit, non-prefetchable) [size=4K]

        Region 2: Memory at febd8000 (64-bit, non-prefetchable) [size=4K]

        Capabilities: [90] MSI: Enable- Count=1/1 Maskable+ 64bit+

                Address: 0000000000000000  Data: 0000

                Masking: 00000000  Pending: 00000000



00:07.0 Co-processor: Intel Corporation DH895XCC Series QAT Virtual Function

        Subsystem: Intel Corporation Device 0000

        Physical Slot: 7

        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-

        Region 0: Memory at febd9000 (64-bit, non-prefetchable) [size=4K]

        Region 2: Memory at febda000 (64-bit, non-prefetchable) [size=4K]

        Capabilities: [90] MSI: Enable- Count=1/1 Maskable+ 64bit+

                Address: 0000000000000000  Data: 0000

                Masking: 00000000  Pending: 00000000



00:08.0 Co-processor: Intel Corporation DH895XCC Series QAT Virtual Function

        Subsystem: Intel Corporation Device 0000

        Physical Slot: 8

        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-

        Region 0: Memory at febdb000 (64-bit, non-prefetchable) [size=4K]

        Region 2: Memory at febdc000 (64-bit, non-prefetchable) [size=4K]

        Capabilities: [90] MSI: Enable- Count=1/1 Maskable+ 64bit+

                Address: 0000000000000000  Data: 0000

                Masking: 00000000  Pending: 00000000



00:09.0 Co-processor: Intel Corporation DH895XCC Series QAT Virtual Function

        Subsystem: Intel Corporation Device 0000

        Physical Slot: 9

        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-

        Region 0: Memory at febdd000 (64-bit, non-prefetchable) [size=4K]

        Region 2: Memory at febde000 (64-bit, non-prefetchable) [size=4K]

        Capabilities: [90] MSI: Enable- Count=1/1 Maskable+ 64bit+

                Address: 0000000000000000  Data: 0000

                Masking: 00000000  Pending: 00000000



root at Local:/opt#



Regards,

Chinmaya