Re: [PATCH net-next] net: prestera: flower template support

[Jamal Hadi Salim]

On 2021-12-02 10:50, Volodymyr Mytnyk wrote:
> From: Volodymyr Mytnyk<vmytnyk@xxxxxxxxxxx>
>
> Add user template explicit support. At this moment, max
> TCAM rule size is utilized for all rules, doesn't matter
> which and how much flower matches are provided by user. It
> means that some of TCAM space is wasted, which impacts
> the number of filters that can be offloaded.
>
> Introducing the template, allows to have more HW offloaded
> filters.
>
> Example:
>    tc qd add dev PORT clsact
>    tc chain add dev PORT ingress protocol ip \
>      flower dst_ip 0.0.0.0/16

"chain" or "filter"?

>    tc filter add dev PORT ingress protocol ip \
>      flower skip_sw dst_ip 1.2.3.4/16 action drop

You are not using tc priority? Above will result in two priorities
(the 0.0.0.0 entry will be more important) and in classical flower
approach two  different tables.
I am wondering how you map the table to the TCAM.
Is the priority sorting entirely based on masks in hardware?

cheers,
jamal