From: Ido Schimmel <idosch@idosch.org>
To: "Volodymyr Mytnyk [C]" <vmytnyk@marvell.com>
Cc: Vadym Kochan <vadym.kochan@plvision.eu>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Jamal Hadi Salim <jhs@mojatatu.com>,
Cong Wang <xiyou.wangcong@gmail.com>,
Andrew Lunn <andrew@lunn.ch>, Vladimir Oltean <olteanv@gmail.com>,
Serhiy Boiko <serhiy.boiko@plvision.eu>,
Volodymyr Mytnyk <volodymyr.mytnyk@plvision.eu>,
Taras Chornyi <taras.chornyi@plvision.eu>,
"Taras Chornyi [C]" <tchornyi@marvell.com>,
Mickey Rachamim <mickeyr@marvell.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Vadym Kochan [C]" <vkochan@marvell.com>
Subject: Re: [PATCH net-next v2 4/4] net: marvell: prestera: Offload FLOW_ACTION_POLICE
Date: Tue, 3 Aug 2021 19:46:44 +0300 [thread overview]
Message-ID: <YQly9LnGStm2Ju0H@shredder> (raw)
In-Reply-To: <SJ0PR18MB4009243B42CB9A03C2C35647B2F09@SJ0PR18MB4009.namprd18.prod.outlook.com>
On Tue, Aug 03, 2021 at 04:19:03PM +0000, Volodymyr Mytnyk [C] wrote:
> > On Mon, Aug 02, 2021 at 05:08:49PM +0300, Vadym Kochan wrote:
> > It seems the implementation assumes that each rule has a different
> > policer, so an error should be returned in case the same policer is
> > shared between different rules.
>
> Each rule has a different policer assigned by HW. Do you mean the police.index should be checked here ?
Yes. Checked to make sure each rule uses a different policer.
>
> >
> > > + break;
> > > default:
> > > NL_SET_ERR_MSG_MOD(extack, "Unsupported action");
> > > pr_err("Unsupported action\n");
> > > @@ -110,6 +117,17 @@ static int prestera_flower_parse(struct prestera_flow_block *block,
> > > return -EOPNOTSUPP;
> > > }
> > >
> > > + if (f->classid) {
> > > + int hw_tc = __tc_classid_to_hwtc(PRESTERA_HW_TC_NUM, f->classid);
> > > +
> > > + if (hw_tc < 0) {
> > > + NL_SET_ERR_MSG_MOD(f->common.extack, "Unsupported HW TC");
> > > + return hw_tc;
> > > + }
> > > +
> > > + prestera_acl_rule_hw_tc_set(rule, hw_tc);
> > > + }
> >
> > Not sure what this is. Can you show a command line example of how this
> > is used?
>
> This is HW traffic class used for packets that are trapped to CPU port. The usage is as the following:
>
> tc qdisc add dev DEV clsact
> tc filter add dev DEV ingress flower skip_sw dst_mac 00:AA:AA:AA:AA:00 hw_tc 1 action trap
You are not using any police action in this example and the changelogs
do not say anything about trap / CPU port so I fail to understand how
this hunk is related to the submission.
>
> >
> > What about visibility regarding number of packets that were dropped by
> > the policer?
>
> This is not support at this moment by the driver, so it is always zero now.
You plan to support it? I imagine the hardware policer is able to report
the number of packets it dropped.
prev parent reply other threads:[~2021-08-03 16:46 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-02 14:08 [PATCH net-next v2 0/4] Marvell Prestera add policer support Vadym Kochan
2021-08-02 14:08 ` [PATCH net-next v2 1/4] net: marvell: prestera: do not fail if FW reply is bigger Vadym Kochan
2021-08-02 14:08 ` [PATCH net-next v2 2/4] net: marvell: prestera: turn FW supported versions into an array Vadym Kochan
2021-08-02 14:08 ` [PATCH net-next v2 3/4] net: sched: introduce __tc_classid_to_hwtc() helper Vadym Kochan
2021-08-02 14:08 ` [PATCH net-next v2 4/4] net: marvell: prestera: Offload FLOW_ACTION_POLICE Vadym Kochan
2021-08-02 15:23 ` Ido Schimmel
2021-08-03 16:19 ` Volodymyr Mytnyk [C]
2021-08-03 16:46 ` Ido Schimmel [this message]
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