netdev - Re: [RFC,net-next 8/9] net: qos: police action add index for tc flower offloading

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Date:   Sun, 21 Jun 2020 13:04:06 +0300
From:   Ido Schimmel <idosch@...sch.org>
To:     Po Liu <Po.Liu@....com>
Cc:     davem@...emloft.net, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, vinicius.gomes@...el.com,
        claudiu.manoil@....com, vladimir.oltean@....com,
        alexandru.marginean@....com, xiaoliang.yang_1@....com,
        roy.zang@....com, mingkai.hu@....com, jerry.huang@....com,
        leoyang.li@....com, michael.chan@...adcom.com, vishal@...lsio.com,
        saeedm@...lanox.com, leon@...nel.org, jiri@...lanox.com,
        idosch@...lanox.com, alexandre.belloni@...tlin.com,
        UNGLinuxDriver@...rochip.com, kuba@...nel.org, jhs@...atatu.com,
        xiyou.wangcong@...il.com, john.hurley@...ronome.com,
        simon.horman@...ronome.com, pieter.jansenvanvuuren@...ronome.com,
        pablo@...filter.org, moshe@...lanox.com,
        ivan.khoronzhuk@...aro.org, m-karicheri2@...com,
        andre.guedes@...ux.intel.com, jakub.kicinski@...ronome.com
Subject: Re: [RFC,net-next  8/9] net: qos: police action add index for tc
 flower offloading

On Fri, Mar 06, 2020 at 08:56:06PM +0800, Po Liu wrote:
> Hardware may own many entries for police flow. So that make one(or
>  multi) flow to be policed by one hardware entry. This patch add the
> police action index provide to the driver side make it mapping the
> driver hardware entry index.
> 
> Signed-off-by: Po Liu <Po.Liu@....com>

Hi,

I started looking into tc-police offload in mlxsw and remembered your
patch. Are you planning to formally submit it? I'm asking because in
mlxsw it is also possible to share the same policer between multiple
filters.

Thanks

> ---
>  include/net/flow_offload.h | 1 +
>  net/sched/cls_api.c        | 1 +
>  2 files changed, 2 insertions(+)
> 
> diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
> index 54df87328edc..3b78b15ed20b 100644
> --- a/include/net/flow_offload.h
> +++ b/include/net/flow_offload.h
> @@ -201,6 +201,7 @@ struct flow_action_entry {
>  			bool			truncate;
>  		} sample;
>  		struct {				/* FLOW_ACTION_POLICE */
> +			u32			index;
>  			s64			burst;
>  			u64			rate_bytes_ps;
>  			u32			mtu;
> diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
> index 363d3991793d..ce846a9dadc1 100644
> --- a/net/sched/cls_api.c
> +++ b/net/sched/cls_api.c
> @@ -3584,6 +3584,7 @@ int tc_setup_flow_action(struct flow_action *flow_action,
>  			entry->police.rate_bytes_ps =
>  				tcf_police_rate_bytes_ps(act);
>  			entry->police.mtu = tcf_police_mtu(act);
> +			entry->police.index = act->tcfa_index;
>  		} else if (is_tcf_ct(act)) {
>  			entry->id = FLOW_ACTION_CT;
>  			entry->ct.action = tcf_ct_action(act);
> -- 
> 2.17.1
>