linux-kernel - Re: [PATCH net-next v2] ixgbe: Add 10G-BX support

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Message-ID: <0c753725-fd6f-4f85-9371-f7342f86acff@lunn.ch>
Date: Tue, 14 Oct 2025 14:27:23 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Birger Koblitz <mail@...ger-koblitz.de>
Cc: Tony Nguyen <anthony.l.nguyen@...el.com>,
	Przemek Kitszel <przemyslaw.kitszel@...el.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v2] ixgbe: Add 10G-BX support

On Tue, Oct 14, 2025 at 06:18:27AM +0200, Birger Koblitz wrote:
61;8003;1c> Adds support for 10G-BX modules, i.e. 10GBit Ethernet over a single strand
> Single-Mode fiber
> The initialization of a 10G-BX SFP+ is the same as for a 10G SX/LX module,
> and is identified according to SFF-8472 table 5-3, footnote 3 by the
> 10G Ethernet Compliance Codes field being empty, the Nominal Bit
> Rate being compatible with 12.5GBit, and the module being a fiber module
> with a Single Mode fiber link length.
> 
> This was tested using a Lightron WSPXG-HS3LC-IEA 1270/1330nm 10km
> transceiver:
> $ sudo ethtool -m enp1s0f1
>    Identifier                          : 0x03 (SFP)
>    Extended identifier                 : 0x04 (GBIC/SFP defined by 2-wire interface ID)
>    Connector                           : 0x07 (LC)
>    Transceiver codes                   : 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
>    Encoding                            : 0x01 (8B/10B)
>    BR Nominal                          : 10300MBd
>    Rate identifier                     : 0x00 (unspecified)
>    Length (SMF)                        : 10km
>    Length (OM2)                        : 0m
>    Length (OM1)                        : 0m
>    Length (Copper or Active cable)     : 0m
>    Length (OM3)                        : 0m
>    Laser wavelength                    : 1330nm
>    Vendor name                         : Lightron Inc.
>    Vendor OUI                          : 00:13:c5
>    Vendor PN                           : WSPXG-HS3LC-IEA
>    Vendor rev                          : 0000
>    Option values                       : 0x00 0x1a
>    Option                              : TX_DISABLE implemented
>    BR margin max                       : 0%
>    BR margin min                       : 0%
>    Vendor SN                           : S142228617
>    Date code                           : 140611
>    Optical diagnostics support         : Yes
> 
> Signed-off-by: Birger Koblitz <mail@...ger-koblitz.de>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew