linux-kernel - Re: [PATCH] net: ti/cpsw_new: Expose the same module parameters as ti/cpsw.

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Message-ID: <e53ac28b-c896-4f8d-a8b0-371f92c4ad5a@lunn.ch>
Date:   Mon, 14 Aug 2023 23:45:17 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Graeme Smecher <gsmecher@...eespeedlogic.com>
Cc:     Grygorii Strashko <grygorii.strashko@...com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        Shay Agroskin <shayagr@...zon.com>,
        Rob Herring <robh@...nel.org>,
        Yang Yingliang <yangyingliang@...wei.com>,
        Marek Majtyka <alardam@...il.com>, linux-omap@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: ti/cpsw_new: Expose the same module parameters as
 ti/cpsw.

On Mon, Aug 14, 2023 at 02:13:21PM -0700, Graeme Smecher wrote:
> The "old" CPSW driver (cpsw.c) exports the following module parameters:
> 
> 	- ti_cpsw.debug_level
> 	- ti_cpsw.ale_ageout
> 	- ti_cpsw.rx_packet_max
> 	- ti_cpsw.descs_pool_size
> 
> This patch exposes the same parameters for the "new" CPSW driver:
> 
> 	- ti_cpsw_new.debug_level
> 	- ti_cpsw_new.ale_ageout
> 	- ti_cpsw_new.rx_packet_max
> 	- ti_cpsw_new.descs_pool_size
> 
> It seems like consistency between the two drivers is a reasonable goal.

The new driver was written because the old driver had a lot of bad
practices. module parameters are bad practices, there are better APIs
to use. So that is why they are not present.

ethtool has an API to set debug_level. descs_pool_size sounds a lot
like ethtool --set-ring. I don't know what the other two do, but look
to see if ethtool has an option to set them.

    Andrew

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