DPDK Netvsc - RNDIS reports VF but device not found, retrying

[Oleksandr Nahnybida <oleksandrn@interfacemasters.com>]

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Hello,

I am trying to set up dpdk with netvsc as master pmd on Azure following
https://learn.microsoft.com/en-us/azure/virtual-network/setup-dpdk?tabs=ubuntu
and
https://doc.dpdk.org/guides-22.11/nics/netvsc.html

but I have the following error messages

EAL: VFIO support initialized
EAL: Probe PCI driver: mlx5_pci (15b3:1018) device: 8565:00:02.0 (socket 0)
mlx5_net: DV flow is not supported.
mlx5_common: Failed to allocate DevX UAR (BF/NC)
mlx5_common: Failed to allocate UAR.
mlx5_net: Failed to prepare Tx DevX UAR.
mlx5_net: probe of PCI device 8565:00:02.0 aborted after encountering an
error: Operation not permitted
mlx5_common: Failed to load driver mlx5_eth
EAL: Requested device 8565:00:02.0 cannot be used
EAL: Probe PCI driver: mlx5_pci (15b3:1018) device: d377:00:02.0 (socket 0)
mlx5_net: DV flow is not supported.
mlx5_common: Failed to allocate DevX UAR (BF/NC)
mlx5_common: Failed to allocate UAR.
mlx5_net: Failed to prepare Tx DevX UAR.
mlx5_net: probe of PCI device d377:00:02.0 aborted after encountering an
error: Operation not permitted
mlx5_common: Failed to load driver mlx5_eth
EAL: Requested device d377:00:02.0 cannot be used
EAL: Probe PCI driver: mlx5_pci (15b3:1018) device: f97e:00:02.0 (socket 0)
mlx5_net: DV flow is not supported.
mlx5_common: Failed to allocate DevX UAR (BF/NC)
mlx5_common: Failed to allocate UAR.
mlx5_net: Failed to prepare Tx DevX UAR.
mlx5_net: probe of PCI device f97e:00:02.0 aborted after encountering an
error: Operation not permitted
mlx5_common: Failed to load driver mlx5_eth
EAL: Requested device f97e:00:02.0 cannot be used
EAL: Bus (pci) probe failed.
hn_vf_attach(): Couldn't find port for VF
hn_vf_add(): RNDIS reports VF but device not found, retrying
hn_vf_attach(): Couldn't find port for VF
hn_vf_add(): RNDIS reports VF but device not found, retrying
and so on in a loop

Also, with debug logs I see

mlx5_common: DevX read access NIC register=0X9055 failed errno=22 status=0
syndrome=0
mlx5_common: DevX read access NIC register=0X9055 failed errno=22 status=0
syndrome=0
mlx5_common: DevX read access NIC register=0X9055 failed errno=22 status=0
syndrome=0


The DPDK version is 22.11, running on
Linux dpdk0 5.15.0-1053-azure #61~20.04.1-Ubuntu
VM type D8ls v5, accelerated networking is on for two ports

driverctl -b vmbus list-devices

000d3a1c-e0df-000d-3a1c-e0df000d3a1c hv_netvsc
000d3a1e-4573-000d-3a1e-4573000d3a1e uio_hv_generic [*]
000d3a1e-47da-000d-3a1e-47da000d3a1e uio_hv_generic [*]


Any, ideas what I might be doing wrong? I see the same behavior with
testpmd and my app.

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