> -----Original Message-----
> From: Xueming(Steven) Li <[email protected]>
> Sent: Saturday, October 16, 2021 11:08
> To: [email protected]
> Cc: Xueming(Steven) Li <[email protected]>; Slava Ovsiienko
> <[email protected]>; Lior Margalit <[email protected]>; Matan
> Azrad <[email protected]>
> Subject: [PATCH v2 7/8] net/mlx5: enable DevX Tx queue creation
>
> Verbs API does not support Infiniband device port number larger 255 by
> design. To support more representors on a single Infiniband device DevX API
> should be engaged.
>
> While creating Send Queue (SQ) object with Verbs API, the PMD assigned IB
> device port attribute and kernel created the default miss flows in FDB domain,
> to redirect egress traffic from the queue being created to representor
> appropriate peer (wire, HPF, VF or SF).
>
> With DevX API there is no IB-device port attribute (it is merely kernel one,
> DevX operates in PRM terms) and PMD must create default miss flows in FDB
> explicitly. PMD did not provide this and using DevX API for E-Switch
> configurations was disabled.
>
> The default miss FDB flow matches E-Switch manager vport (to make sure the
> source is some representor) and SQn (Send Queue number - device internal
> queue index). The root flow table managed by kernel/firmware and it does
> not support vport redirect action, we have to split the default miss flow into
> two ones:
>
> - flow with lowest priority in the root table that matches E-Switch manager
> vport ID and jump to group 1.
> - flow in group 1 that matches E-Switch manager vport ID and SQn and
> forwards packet to peer vport
>
> Signed-off-by: Xueming Li <[email protected]>
Acked-by: Viacheslav Ovsiienko <[email protected]>
