netdev - Re: ethtool: ring configuration for CAN devices

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Message-ID: <20211025131423.q2o6oybl5mj5rq6x@pengutronix.de>
Date:   Mon, 25 Oct 2021 15:14:23 +0200
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     linux-can <linux-can@...r.kernel.org>, netdev@...r.kernel.org
Subject: Re: ethtool: ring configuration for CAN devices

On 25.10.2021 14:58:58, Andrew Lunn wrote:
> > > struct ethtool_kringparam {
> > > 	__u32	cmd;
> > > 	__u32   mode;
> > > 	__u32	rx_max_pending;
> > > 	__u32	rx_mini_max_pending;
> > > 	__u32	rx_jumbo_max_pending;
> > > 	__u32	tx_max_pending;
> > > 	__u32	rx_pending;
> > > 	__u32	rx_mini_pending;
> > > 	__u32	rx_jumbo_pending;
> > > 	__u32	tx_pending;
> > > };
> > > 
> > > and use this structure between the ethtool core and the drivers. This
> > > has already been done at least once to allow extending the
> > > API. Semantic patches are good for making the needed changes to all
> > > the drivers.
> > 
> > What about the proposed "two new parameters ringparam_ext and extack for
> > .get_ringparam and .set_ringparam to extend more ring params through
> > netlink." by Hao Chen/Guangbin Huang in:
> > 
> > https://lore.kernel.org/all/20211014113943.16231-5-huangguangbin2@huawei.com/
> >
> > I personally like the conversion of the in in-kernel API to struct
> > ethtool_kringparam better than adding ringparam_ext.
> 
> Ah, i missed that development. I don't like it.
> 
> You should probably jump into that discussion and explain your
> requirements. Make sure it is heading in a direction you can extend
> for your needs.

Will do. I've added you on Cc.

regards,
Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde           |
Embedded Linux                   | https://www.pengutronix.de  |
Vertretung West/Dortmund         | Phone: +49-231-2826-924     |
Amtsgericht Hildesheim, HRA 2686 | Fax:   +49-5121-206917-5555 |

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