netdev - RE: [PATCH v3 net-next 01/13] net: enetc: add initial netc-lib driver to support NTMP

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Message-ID:
 <PAXPR04MB8510771650890E8B7395B2DA88D42@PAXPR04MB8510.eurprd04.prod.outlook.com>
Date: Sat, 8 Mar 2025 02:05:35 +0000
From: Wei Fang <wei.fang@....com>
To: Jakub Kicinski <kuba@...nel.org>
CC: Claudiu Manoil <claudiu.manoil@....com>, Vladimir Oltean
	<vladimir.oltean@....com>, Clark Wang <xiaoning.wang@....com>,
	"andrew+netdev@...n.ch" <andrew+netdev@...n.ch>, "davem@...emloft.net"
	<davem@...emloft.net>, "edumazet@...gle.com" <edumazet@...gle.com>,
	"pabeni@...hat.com" <pabeni@...hat.com>, "christophe.leroy@...roup.eu"
	<christophe.leroy@...roup.eu>, "netdev@...r.kernel.org"
	<netdev@...r.kernel.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "imx@...ts.linux.dev" <imx@...ts.linux.dev>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>
Subject: RE: [PATCH v3 net-next 01/13] net: enetc: add initial netc-lib driver
 to support NTMP

> > On Tue,  4 Mar 2025 15:21:49 +0800 Wei Fang wrote:
> > > +config NXP_NETC_LIB
> > > +	tristate "NETC Library"
> >
> > Remove the string after "tristate", the user should not be prompted
> > to make a choice for this, since the consumers "select" this config
> > directly.
> >
> 
> Okay, I will remove it.
> 
> > > +	help
> > > +	  This module provides common functionalities for both ENETC and NETC
> > > +	  Switch, such as NETC Table Management Protocol (NTMP) 2.0,
> common
> > tc
> > > +	  flower and debugfs interfaces and so on.
> > > +
> > > +	  If compiled as module (M), the module name is nxp-netc-lib.
> >
> > Not sure if the help makes sense for an invisible symbol either.
> 
> Yes, I think it can also be removed. Thanks.
> >
> > >  config FSL_ENETC
> > >  	tristate "ENETC PF driver"
> > >  	depends on PCI_MSI
> > > @@ -40,6 +50,7 @@ config NXP_ENETC4
> > >  	select FSL_ENETC_CORE
> > >  	select FSL_ENETC_MDIO
> > >  	select NXP_ENETC_PF_COMMON
> > > +	select NXP_NETC_LIB
> > >  	select PHYLINK
> > >  	select DIMLIB
> > >  	help
> >
> > > +#pragma pack(1)
> >
> > please don't blindly pack all structs, only if they are misaligned
> > or will otherwise have holes.
> 
> Because these structures are in hardware buffer format and need
> to be aligned, so for convenience, I simply used pack(1). You are right,
> I should use pack() for structures with holes. Thanks.
> >
> > > +#if IS_ENABLED(CONFIG_NXP_NETC_LIB)
> >
> > why the ifdef, all callers select the config option
> 
> hm..., there are some interfaces of netc-lib are used in common .c files
> in downstream, so I used "ifdef" in downstream. Now for the upstream,
> I'm going to separate them from the common .c files. So yes, we can
> remove it now.

Sorry, I misread the header file. The ifdef in ntmp.h is needed because
the interfaces in this header file will be used by the enetc-core and
enetc-vf drivers. For the ENETC v1 (LS1028A platform), it will not select
NXP_NETC_LIB.