Dear Juraj,

I don't think anybody have experience with ThunderX to help you here.
The facts that other NICs work OK indicates that that this particular driver 
requires something special.
What it is, you will probably need to ask Cavium/Marvell guys...

-- 
Damjan

> On 11 Dec 2018, at 07:56, Juraj Linkeš <juraj.lin...@pantheon.tech> wrote:
> 
> Hi folks,
>  
> I've ran into an issue with hugepages on a Cavium ThunderX soc. I was trying 
> to bind a physical interface to VPP. When using 1GB hugepages the interface 
> seems to be working fine (well, at least I saw the interface in VPP and I was 
> able to configure it and use ping with it), but when using 2MB hugepages the 
> interface appeared in error state. The output from show hardware told me this:
> VirtualFunctionEthernet1/0/1       1    down  VirtualFunctionEthernet1/0/1
>   Ethernet address 40:8d:5c:e7:b1:12
>   Cavium ThunderX
>     carrier down 
>     flags: pmd pmd-init-fail maybe-multiseg
>     rx: queues 1 (max 96), desc 1024 (min 0 max 65535 align 1)
>     tx: queues 1 (max 96), desc 1024 (min 0 max 65535 align 1)
>     pci: device 177d:a034 subsystem 177d:a134 address 0002:01:00.01 numa 0
>     module: unknown
>     max rx packet len: 9204
>     promiscuous: unicast off all-multicast off
>     vlan offload: strip off filter off qinq off
>     rx offload avail:  vlan-strip ipv4-cksum udp-cksum tcp-cksum jumbo-frame
>                        crc-strip scatter
>     rx offload active: jumbo-frame crc-strip scatter
>     tx offload avail:  ipv4-cksum udp-cksum tcp-cksum outer-ipv4-cksum
>     tx offload active:
>     rss avail:         ipv4 ipv4-tcp ipv4-udp ipv6 ipv6-tcp ipv6-udp port
>                        vxlan geneve nvgre
>     rss active:        ipv4 ipv4-tcp ipv4-udp ipv6 ipv6-tcp ipv6-udp
>     tx burst function: (nil)
>     rx burst function: (nil)
>   Errors:
>     rte_eth_rx_queue_setup[port:0, errno:-22]: Unknown error -22
>  
> I dug around a bit and this seems to be what -22 means:
>  
> #define EINVAL          22      /* Invalid argument */
> -EINVAL: The size of network buffers which can be allocated from the memory 
> pool does not fit the various buffer sizes allowed by the device controller.
>  
> Is this something you've seen before? Is this a bug? Do I need to do 
> something extra if I want to use 2MB hugepages?
>  
> Thanks,
> Juraj
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