netdev - RE: [PATCH 2/3] ocelot_ace: fix ingress ports setting for rule

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Date:   Tue, 13 Aug 2019 02:36:38 +0000
From:   "Y.b. Lu" <yangbo.lu@....com>
To:     "Allan W. Nielsen" <allan.nielsen@...rochip.com>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>
Subject: RE: [PATCH 2/3] ocelot_ace: fix ingress ports setting for rule

Hi Allan,

> -----Original Message-----
> From: Allan W. Nielsen <allan.nielsen@...rochip.com>
> Sent: Monday, August 12, 2019 8:38 PM
> To: Y.b. Lu <yangbo.lu@....com>
> Cc: netdev@...r.kernel.org; David S . Miller <davem@...emloft.net>;
> Alexandre Belloni <alexandre.belloni@...tlin.com>; Microchip Linux Driver
> Support <UNGLinuxDriver@...rochip.com>
> Subject: Re: [PATCH 2/3] ocelot_ace: fix ingress ports setting for rule
> 
> The 08/12/2019 18:48, Yangbo Lu wrote:
> > The ingress ports setting of rule should support covering all ports.
> > This patch is to use u16 ingress_port for ingress port mask setting
> > for ace rule. One bit corresponds one port.
> That is how the HW is working, and it would be nice if we could operate on a
> port masks/lists instead. But how can this be used?

[Y.b. Lu] Will the changes affect anything? Current usage in ocelot_flower.c will be converted as below.

-       rule->chip_port = block->port->chip_port;
+       rule->ingress_port = BIT(block->port->chip_port);


> 
> Can you please explain how/when this will make a difference?

[Y.b. Lu] Actually I have another internal patch based on this patch-set for setting rule of trapping IEEE 1588 PTP Ethernet frames.
For such rule which should be applied on several ingress ports, we can set it once when ocelot initialization I think.

The internal patch I mentioned is for felix which had different ports number (VCAP_PORT_CNT). So I hadn't sent it out.
Let me just send v2 patch-set with the patch dropping VCAP_PORT_CNT changes for your reviewing.
Please feel free to provide suggestion.

Thanks a lot:)
> 
> > Signed-off-by: Yangbo Lu <yangbo.lu@....com>
> > ---
> >  drivers/net/ethernet/mscc/ocelot_ace.c    | 2 +-
> >  drivers/net/ethernet/mscc/ocelot_ace.h    | 2 +-
> >  drivers/net/ethernet/mscc/ocelot_flower.c | 2 +-
> >  3 files changed, 3 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/net/ethernet/mscc/ocelot_ace.c
> > b/drivers/net/ethernet/mscc/ocelot_ace.c
> > index 5580a58..91250f3 100644
> > --- a/drivers/net/ethernet/mscc/ocelot_ace.c
> > +++ b/drivers/net/ethernet/mscc/ocelot_ace.c
> > @@ -352,7 +352,7 @@ static void is2_entry_set(struct ocelot *ocelot, int ix,
> >  	data.type = IS2_ACTION_TYPE_NORMAL;
> >
> >  	VCAP_KEY_ANY_SET(PAG);
> > -	VCAP_KEY_SET(IGR_PORT_MASK, 0, ~BIT(ace->chip_port));
> > +	VCAP_KEY_SET(IGR_PORT_MASK, 0, ~ace->ingress_port);
> >  	VCAP_KEY_BIT_SET(FIRST, OCELOT_VCAP_BIT_1);
> >  	VCAP_KEY_BIT_SET(HOST_MATCH, OCELOT_VCAP_BIT_ANY);
> >  	VCAP_KEY_BIT_SET(L2_MC, ace->dmac_mc); diff --git
> > a/drivers/net/ethernet/mscc/ocelot_ace.h
> > b/drivers/net/ethernet/mscc/ocelot_ace.h
> > index ce72f02..0fe23e0 100644
> > --- a/drivers/net/ethernet/mscc/ocelot_ace.h
> > +++ b/drivers/net/ethernet/mscc/ocelot_ace.h
> > @@ -193,7 +193,7 @@ struct ocelot_ace_rule {
> >
> >  	enum ocelot_ace_action action;
> >  	struct ocelot_ace_stats stats;
> > -	int chip_port;
> > +	u16 ingress_port;
> >
> >  	enum ocelot_vcap_bit dmac_mc;
> >  	enum ocelot_vcap_bit dmac_bc;
> > diff --git a/drivers/net/ethernet/mscc/ocelot_flower.c
> > b/drivers/net/ethernet/mscc/ocelot_flower.c
> > index 7c60e8c..bfddc50 100644
> > --- a/drivers/net/ethernet/mscc/ocelot_flower.c
> > +++ b/drivers/net/ethernet/mscc/ocelot_flower.c
> > @@ -184,7 +184,7 @@ struct ocelot_ace_rule
> *ocelot_ace_rule_create(struct flow_cls_offload *f,
> >  		return NULL;
> >
> >  	rule->ocelot = block->port->ocelot;
> > -	rule->chip_port = block->port->chip_port;
> > +	rule->ingress_port = BIT(block->port->chip_port);
> >  	return rule;
> >  }
> 
> -- Allan