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From: Xiaoliang Yang <xiaoliang.yang_1@nxp.com>
To: Vladimir Oltean <vladimir.oltean@nxp.com>
Cc: "davem@davemloft.net" <davem@davemloft.net>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	"allan.nielsen@microchip.com" <allan.nielsen@microchip.com>,
	"joergen.andreasen@microchip.com"
	<joergen.andreasen@microchip.com>,
	"UNGLinuxDriver@microchip.com" <UNGLinuxDriver@microchip.com>,
	"vinicius.gomes@intel.com" <vinicius.gomes@intel.com>,
	"michael.chan@broadcom.com" <michael.chan@broadcom.com>,
	"vishal@chelsio.com" <vishal@chelsio.com>,
	"saeedm@mellanox.com" <saeedm@mellanox.com>,
	"jiri@mellanox.com" <jiri@mellanox.com>,
	"idosch@mellanox.com" <idosch@mellanox.com>,
	"alexandre.belloni@bootlin.com" <alexandre.belloni@bootlin.com>,
	"kuba@kernel.org" <kuba@kernel.org>, Po Liu <po.liu@nxp.com>,
	Leo Li <leoyang.li@nxp.com>
Subject: RE: [RFC v2 net-next 4/8] net: mscc: ocelot: add gate and police action offload to PSFP
Date: Thu, 19 Aug 2021 10:00:43 +0000	[thread overview]
Message-ID: <DB8PR04MB57852F0E658C57DD4B0B76E2F0C09@DB8PR04MB5785.eurprd04.prod.outlook.com> (raw)
In-Reply-To: <20210818150053.numtnvntscxcm6r4@skbuf>

Hi Vladimir,

On Wed, Aug 18, 2021 at 23:01:23PM +0800, Vladimir Oltean wrote:
> > @@ -718,6 +734,15 @@ int ocelot_cls_flower_replace(struct ocelot *ocelot,
> int port,
> >  	if (filter->type == OCELOT_VCAP_FILTER_DUMMY)
> >  		return ocelot_vcap_dummy_filter_add(ocelot, filter);
> >
> > +	if (filter->type == OCELOT_PSFP_FILTER_OFFLOAD) {
> > +		kfree(filter);
> > +		if (ocelot->ops->psfp_filter_add)
> > +			return ocelot->ops->psfp_filter_add(ocelot, f);
> > +
> > +		NL_SET_ERR_MSG_MOD(extack, "PSFP chain is not supported in
> HW");
> > +		return -EOPNOTSUPP;
> > +	}
> > +
> >  	return ocelot_vcap_filter_add(ocelot, filter, f->common.extack);  }
> 
> Hmm, I don't really like the idea of allocating an ocelot_vcap_filter which we
> don't need for PSFP filters, just to kfree it later.
> 
> Is it that much more complicated to not allocate it at all in the first place, add
> a bunch of "if" conditions that allocate a VCAP filter only if we are offloading a
> VCAP chain?
> 
> And that means, don't create ocelot_vcap_filter::type ==
> OCELOT_PSFP_FILTER_OFFLOAD, because PSFP filters are not VCAP filters.
The "vcap filter" variable need to be created and use ocelot_flower_parse() to get the type. If the rule is checked as a OCELOT_VCAP_FILTER_DUMMY, the chain 30000 dummy rule will be added in vcap_dummy_filter. And not offload to PSFP filter function. So I created the "vcap filter" and free it before offload to PSFP filter function.

Thanks,
xiaoliang

  reply	other threads:[~2021-08-19 10:00 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-18  6:19 [RFC v2 net-next 0/8] net: dsa: felix: psfp support on vsc9959 Xiaoliang Yang
2021-08-18  6:19 ` [RFC v2 net-next 1/8] net: mscc: ocelot: add MAC table write and lookup operations Xiaoliang Yang
2021-08-18 14:05   ` Vladimir Oltean
2021-08-18  6:19 ` [RFC v2 net-next 2/8] net: mscc: ocelot: export MAC table lookup and write Xiaoliang Yang
2021-08-18 14:07   ` Vladimir Oltean
2021-08-18 14:08   ` Vladimir Oltean
2021-08-18  6:19 ` [RFC v2 net-next 3/8] net: mscc: ocelot: set vcap IS2 chain to goto PSFP chain Xiaoliang Yang
2021-08-18 14:54   ` Vladimir Oltean
2021-08-19  9:49     ` Xiaoliang Yang
2021-08-18  6:19 ` [RFC v2 net-next 4/8] net: mscc: ocelot: add gate and police action offload to PSFP Xiaoliang Yang
2021-08-18 15:00   ` Vladimir Oltean
2021-08-19 10:00     ` Xiaoliang Yang [this message]
2021-08-18  6:19 ` [RFC v2 net-next 5/8] net: dsa: felix: support psfp filter on vsc9959 Xiaoliang Yang
2021-08-18 18:58   ` Vladimir Oltean
2021-08-18  6:19 ` [RFC v2 net-next 6/8] net: dsa: felix: add stream gate settings for psfp Xiaoliang Yang
2021-08-18  6:19 ` [RFC v2 net-next 7/8] net: mscc: ocelot: use index to set vcap policer Xiaoliang Yang
2021-08-18  6:19 ` [RFC v2 net-next 8/8] net: dsa: felix: use vcap policer to set flow meter for psfp Xiaoliang Yang

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