From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: Josua Mayer <josua@solid-run.com>
Cc: Andrew Lunn <andrew@lunn.ch>,
Heiner Kallweit <hkallweit1@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH RFC net-next v2 2/2] net: sfp: support 25G long-range modules (extended compliance code 0x3)
Date: Fri, 2 Jan 2026 12:48:06 +0000 [thread overview]
Message-ID: <aVe-hq6yZfdKTT20@shell.armlinux.org.uk> (raw)
In-Reply-To: <20260101-cisco-1g-sfp-phy-features-v2-2-47781d9e7747@solid-run.com>
On Thu, Jan 01, 2026 at 06:05:39PM +0200, Josua Mayer wrote:
> The extended compliance code value SFF8024_ECC_100GBASE_ER4_25GBASE_ER
> (0x3) means either 4-lane 100G or single lane 25G.
>
> Set 25000baseSR_Full mode supported in addition to the already set
> 100000baseLR4_ER4_Full.
>
> This is slightly wrong considering 25000baseSR_Full is short-range but
> the compliance code means long range.
>
> Unfortunately ethtool.h does not (currently) provide a bit for 25G
> long-range modules.
> Should it be added?
> Are there any reasons to not have long-range variants?
Good questions, not something I can answer though.
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!
prev parent reply other threads:[~2026-01-02 12:48 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-01 16:05 [PATCH RFC net-next v2 0/2] net: phy: marvell: 88e1111: define gigabit features Josua Mayer
2026-01-01 16:05 ` [PATCH RFC net-next v2 1/2] " Josua Mayer
2026-01-02 12:47 ` Russell King (Oracle)
2026-01-02 13:55 ` Russell King (Oracle)
2026-01-19 8:30 ` Josua Mayer
2026-01-19 10:52 ` Russell King (Oracle)
2026-01-19 9:27 ` Maxime Chevallier
2026-01-21 9:52 ` Josua Mayer
2026-01-21 15:06 ` Russell King (Oracle)
2026-01-22 12:31 ` Maxime Chevallier
2026-01-01 16:05 ` [PATCH RFC net-next v2 2/2] net: sfp: support 25G long-range modules (extended compliance code 0x3) Josua Mayer
2026-01-01 17:43 ` Andrew Lunn
2026-01-02 12:48 ` Russell King (Oracle) [this message]
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