Re: [dpdk-dev] [PATCH] net/i40e: fix X722 FDIR field mask

["Xing, Beilei" <beilei.xing@intel.com>]

> -----Original Message-----
> From: Zhang,Alvin <alvinx.zhang@intel.com>
> Sent: Friday, January 29, 2021 10:09 AM
> To: Guo, Jia <jia.guo@intel.com>; Xing, Beilei <beilei.xing@intel.com>; Zhang,
> Qi Z <qi.z.zhang@intel.com>
> Cc: dev@dpdk.org
> Subject: [PATCH] net/i40e: fix X722 FDIR field mask
> 
> From: Alvin Zhang <alvinx.zhang@intel.com>
> 
> The absolute field offsets of IPv4 or IPv6 header are related to hardware
> configuration. The X710 and X722 have different hardware configurations, and
> users can even modify the hardware configuration.
> Therefore, The default values cannot be used when calculating mask offset.
> 
> commands and packets as below:
>   flow create 0 ingress pattern eth / ipv4 proto is 255  / end
>   actions queue index 2 / end
>   pkt = Ether()/IP(ttl=63, proto=255)/Raw('X'*40)
> 
>   flow create 0 ingress pattern eth / ipv4 tos is 50 / udp / end
>   actions queue index 2 / end
>   pkt = Ether()/IP(tos=50)/UDP()/Raw('X'*40)
> 
>   flow create 0 ingress pattern eth / ipv6 tc is 12 / udp / end
>   actions queue index 3 / end
>   pkt = Ether()/IPv6(tc=12,hlim=34,fl=0x98765)/UDP()/Raw('X'*40)
> 
>   flow create 0 ingress pattern eth / ipv6 hop is 34 / end actions
>   queue index 3 / end
>   pkt = Ether()/IPv6(tc=12,hlim=34,fl=0x98765)/Raw('X'*40)

Not very clear about the issue, the above flows will fail to be created with X722?
And you fix is for FDIR, does RSS have similar issue?

Beilei