netdev - Re: [PATCH RFC 0/9] Add and use helper for PCS negotiation modes

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Date: Wed, 24 May 2023 09:26:19 +0200
From: Horatiu Vultur <horatiu.vultur@...rochip.com>
To: "Russell King (Oracle)" <linux@...linux.org.uk>
CC: Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>,
	Daniel Machon <daniel.machon@...rochip.com>, "David S. Miller"
	<davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Florian Fainelli
	<f.fainelli@...il.com>, Ioana Ciornei <ioana.ciornei@....com>, Jakub Kicinski
	<kuba@...nel.org>, Lars Povlsen <lars.povlsen@...rochip.com>,
	<linux-arm-kernel@...ts.infradead.org>, Madalin Bucur
	<madalin.bucur@....com>, Marcin Wojtas <mw@...ihalf.com>, Michal Simek
	<michal.simek@....com>, <netdev@...r.kernel.org>, Paolo Abeni
	<pabeni@...hat.com>, Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>,
	Sean Anderson <sean.anderson@...o.com>, Steen Hegelund
	<Steen.Hegelund@...rochip.com>, Taras Chornyi <taras.chornyi@...ision.eu>,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
	<UNGLinuxDriver@...rochip.com>, Vladimir Oltean <olteanv@...il.com>
Subject: Re: [PATCH RFC 0/9] Add and use helper for PCS negotiation modes

The 05/23/2023 16:54, Russell King (Oracle) wrote:

Hi Russell,

I have tried this series on lan966x and it seems to be working fine.
There was a small issue applying the patch 3, as the function
'phylink_resolve_c73' doesn't exist yet.

> 
> Hi,
> 
> Earlier this month, I proposed a helper for deciding whether a PCS
> should use inband negotiation modes or not. There was some discussion
> around this topic, and I believe there was no disagreement about
> providing the helper.
> 
> The discussion can be found at:
> 
> https://lore.kernel.org/r/ZGIkGmyL8yL1q1zp@shell.armlinux.org.uk
> 
> This series adds that helper, and modifies most code to use it. I have
> a couple of further patches that hoist this function out of every PCS
> driver and into phylink's new phylink_pcs_config() function that I've
> posted separately, and drop the "mode" argument to the pcs_config()
> method, instead passing the result of phylink_pcs_neg_mode().
> 
> I haven't included those because this series doesn't update everything
> in net-next, but for RFC purposes, I think this is good enough to get
> a few whether people are generally happy or not.
> 
> Note that this helper is only about modes that affect the PCS such as
> the SGMII family and 802.3z types, not amount negotiation that happens
> in order to select a PCS (e.g. for backplanes.)
> 
>  drivers/net/dsa/qca/qca8k-8xxx.c                   | 13 ++--
>  drivers/net/ethernet/freescale/fman/fman_dtsec.c   |  7 +-
>  drivers/net/ethernet/marvell/mvneta.c              |  5 +-
>  drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c    |  4 +-
>  .../net/ethernet/marvell/prestera/prestera_main.c  | 10 ++-
>  .../ethernet/microchip/lan966x/lan966x_phylink.c   |  8 ++-
>  .../net/ethernet/microchip/sparx5/sparx5_phylink.c |  8 ++-
>  drivers/net/ethernet/xilinx/xilinx_axienet_main.c  |  5 +-
>  drivers/net/pcs/pcs-lynx.c                         | 18 +++--
>  drivers/net/phy/phylink.c                          | 14 ++--
>  include/linux/phylink.h                            | 81 +++++++++++++++++++++-
>  11 files changed, 136 insertions(+), 37 deletions(-)
> 
> --
> RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
> FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!

-- 
/Horatiu