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ethtool: link 10000baseCR to SFF-8431, Appendix-E SFP+ DA

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Add comment to clarify the physical media 10000baseCR follows.

10000baseCR does not correspond to any IEEE 802.3 *base-CR PMD.
It has no autonegotiation, no link training, and no mandatory FEC.
The industry standard for this media type is SFF-8431 Appendix-E
Direct Attach cable, also known as 10G_SFI_DA.

Link: https://lore.kernel.org/r/SN7PR11MB69003D33489DB1D6B17EF72A9AF52@SN7PR11MB6900.namprd11.prod.outlook.com

Signed-off-by: Siddaraju DH <siddaraju.dh@intel.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/20260703100537.1109838-1-siddaraju.dh@intel.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Siddaraju DH
2026-07-03 15:35:37 +05:30
committed by Paolo Abeni
parent 5c655dfd98
commit 008f965fb4
1 changed files with 6 additions and 0 deletions
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6
include/uapi/linux/ethtool.h
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@@ -2013,7 +2013,13 @@ enum ethtool_link_mode_bit_indices {
ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT = 39,
ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT = 40,
ETHTOOL_LINK_MODE_1000baseX_Full_BIT = 41,
/* Despite the "baseCR" in 10000baseCR, this is not an IEEE 802.3 baseCR
* It represents SFF-8431 Appendix-E SFP+ Direct Attach (10G-SFI-DA).
* The name is kept as-is for uAPI backward compatibility.
*/
ETHTOOL_LINK_MODE_10000baseCR_Full_BIT = 42,
ETHTOOL_LINK_MODE_10000baseSR_Full_BIT = 43,
ETHTOOL_LINK_MODE_10000baseLR_Full_BIT = 44,
ETHTOOL_LINK_MODE_10000baseLRM_Full_BIT = 45,