linux-kernel - Re: [PATCH net-next v3 3/5] amd-xgbe: add support for new XPCS routines

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Message-ID: <20250512135632.GF3339421@horms.kernel.org>
Date: Mon, 12 May 2025 14:56:32 +0100
From: Simon Horman <horms@...nel.org>
To: Raju Rangoju <Raju.Rangoju@....com>
Cc: andrew+netdev@...n.ch, davem@...emloft.net, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, Shyam-sundar.S-k@....com,
	Sudheesh Mavila <sudheesh.mavila@....com>
Subject: Re: [PATCH net-next v3 3/5] amd-xgbe: add support for new XPCS
 routines

On Fri, May 09, 2025 at 09:23:23PM +0530, Raju Rangoju wrote:
> Add the necessary support to enable Renoir ethernet device. Since the
> BAR1 address cannot be used to access the XPCS registers on Renoir, use
> the smn functions.
> 
> Some of the ethernet add-in-cards have dual PHY but share a single MDIO
> line (between the ports). In such cases, link inconsistencies are
> noticed during the heavy traffic and during reboot stress tests. Using
> smn calls helps avoid such race conditions.
> 
> Suggested-by: Sudheesh Mavila <sudheesh.mavila@....com>
> Signed-off-by: Raju Rangoju <Raju.Rangoju@....com>

Reviewed-by: Simon Horman <horms@...nel.org>