linux-kernel - Re: [PATCH net-next v1 0/5] net: stmmac: FPE via ethtool + tc

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Message-ID: <max7qd6eafatuse22ymmbfhumrctvf2lenwzhn6sxsm5ugebh6@udblqrtlblbf>
Date: Mon, 5 Aug 2024 20:11:10 +0300
From: Serge Semin <fancer.lancer@...il.com>
To: Furong Xu <0x1207@...il.com>, Vladimir Oltean <olteanv@...il.com>
Cc: Andrew Lunn <andrew@...n.ch>, "David S. Miller" <davem@...emloft.net>, 
	Alexandre Torgue <alexandre.torgue@...s.st.com>, Jose Abreu <joabreu@...opsys.com>, 
	Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>, Maxime Coquelin <mcoquelin.stm32@...il.com>, 
	Joao Pinto <jpinto@...opsys.com>, netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, xfr@...look.com, rock.xu@....com
Subject: Re: [PATCH net-next v1 0/5] net: stmmac: FPE via ethtool + tc

Hi Furong

On Wed, Jul 31, 2024 at 06:43:11PM +0800, Furong Xu wrote:
> Move the Frame Preemption(FPE) over to the new standard API which uses
> ethtool-mm/tc-mqprio/tc-taprio.

Thank you very much for the series. I am not that much aware of the
FPE and ethtool MAC Merge guts. But I had a thoughtful glance to the
FPE-handshaking algo and got to a realization that all the FPE-related
data defined in the include/linux/stmmac.h weren't actually
platform-data. All of that are the run-time settings utilized during
the handshaking algo execution.

So could you please move the fpe_cfg field to the stmmac_priv data and
move the FPE-related declarations from the include/linux/stmmac.h
header file to the drivers/net/ethernet/stmicro/stmmac/stmmac.h file?
It's better to be done in a pre-requisite (preparation) patch of your
series.

Another useful cleanup would be moving the entire FPE-implementation
from stmmac_main.c to a separate module. Thus the main
driver code would be simplified a bit. I guess it could be moved to
the stmmac_tc.c file since FPE is the TC-related feature. Right?

Vladimir, what do you think about the suggestions above?

-Serge(y)

> 
> Furong Xu (5):
>   net: stmmac: configure FPE via ethtool-mm
>   net: stmmac: support fp parameter of tc-mqprio
>   net: stmmac: support fp parameter of tc-taprio
>   net: stmmac: drop unneeded FPE handshake code
>   net: stmmac: silence FPE kernel logs
> 
>  .../net/ethernet/stmicro/stmmac/dwmac4_core.c |   6 +
>  drivers/net/ethernet/stmicro/stmmac/dwmac5.c  |  37 +++++-
>  drivers/net/ethernet/stmicro/stmmac/dwmac5.h  |   7 ++
>  drivers/net/ethernet/stmicro/stmmac/hwif.h    |  14 +++
>  drivers/net/ethernet/stmicro/stmmac/stmmac.h  |   3 +
>  .../ethernet/stmicro/stmmac/stmmac_ethtool.c  | 111 ++++++++++++++++++
>  .../net/ethernet/stmicro/stmmac/stmmac_main.c |  25 ++--
>  .../net/ethernet/stmicro/stmmac/stmmac_tc.c   |  95 ++++++++++-----
>  include/linux/stmmac.h                        |   2 +-
>  9 files changed, 248 insertions(+), 52 deletions(-)
> 
> -- 
> 2.34.1
> 
>