Re: [dpdk-stable] [dpdk-dev] [PATCH] ethdev: update qfi definition

[Ferruh Yigit <ferruh.yigit@intel.com>]

On 3/23/2021 12:11 PM, Raslan Darawsheh wrote:
> qfi field is 8 bits which represent single bit for
> PPP (paging Policy Presence) single bit for RQI
> (Reflective QoS Indicator) and 6 bits for qfi
> (QoS Flow Identifier)

Can you please put a reference for above information?

> 
> This update the doxygen format and the mask for qfi
> to properly identify the full 8 bits of the field.
> 
> note: changing the default mask would cause different
> patterns generated by testpmd.
> 
> Fixes: 346553db5bd1 ("ethdev: add GTP extension header to flow API")
> Cc: ying.a.wang@intel.com
> Cc: stable@dpdk.org
> 
> Signed-off-by: Raslan Darawsheh <rasland@nvidia.com>
> ---
>   doc/guides/testpmd_app_ug/testpmd_funcs.rst | 3 ++-
>   lib/librte_ethdev/rte_flow.h                | 4 ++--
>   2 files changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/doc/guides/testpmd_app_ug/testpmd_funcs.rst b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
> index f59eb8a27d..dd39c4c3c2 100644
> --- a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
> +++ b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
> @@ -3742,7 +3742,8 @@ This section lists supported pattern items and their attributes, if any.
>   - ``gtp_psc``: match GTP PDU extension header with type 0x85.
>   
>     - ``pdu_type {unsigned}``: PDU type.
> -  - ``qfi {unsigned}``: QoS flow identifier.
> +
> +  - ``qfi {unsigned}``: PPP, RQI and QoS flow identifier.
>   
>   - ``pppoes``, ``pppoed``: match PPPoE header.
>   
> diff --git a/lib/librte_ethdev/rte_flow.h b/lib/librte_ethdev/rte_flow.h
> index 669e677e91..79106e0246 100644
> --- a/lib/librte_ethdev/rte_flow.h
> +++ b/lib/librte_ethdev/rte_flow.h
> @@ -1392,14 +1392,14 @@ static const struct rte_flow_item_meta rte_flow_item_meta_mask = {
>    */
>   struct rte_flow_item_gtp_psc {
>   	uint8_t pdu_type; /**< PDU type. */
> -	uint8_t qfi; /**< QoS flow identifier. */
> +	uint8_t qfi; /**< PPP, RQI, QoS flow identifier. */
>   };

By design requirement, rte_flow_item_* should start with the relevant protocol 
header.

There is already a deprecation notice for using protocol header directly in the 
rte_flow_item* [1] and Adrew/Ivan already fixed a few of them [2].

Your patch is not directly related on this, but since you are touching to the 
flow_item, would you mind create a protocol struct for it first, and use it in 
the "struct rte_flow_item_gtp_psc"?
So the protocol related update can be done in the protocol header, instead of 
rte_flow struct.


[1]
https://git.dpdk.org/dpdk/tree/doc/guides/rel_notes/deprecation.rst?h=v21.02#n99

[2]
https://git.dpdk.org/next/dpdk-next-net/commit/?id=4a061a7bd70bfa023de23e8e654e