* [PATCH v2 net-next] ethtool: link 10000baseCR to SFF-8431, Appendix-E SFP+ DA
@ 2026-07-03 10:05 Siddaraju DH
2026-07-03 12:53 ` Maxime Chevallier
0 siblings, 1 reply; 2+ messages in thread
From: Siddaraju DH @ 2026-07-03 10:05 UTC (permalink / raw)
To: Michal Kubecek, Andrew Lunn, Maxime Chevallier, kuba, netdev
Cc: Shubham Das, Balaji Chintalapalle, Vijay Srinivasan,
Magnus Lindberg, Niklas Damberg, Jonas Wirandi, Siddaraju DH,
Siddaraju DH
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>
---
include/uapi/linux/ethtool.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index a2091d4e00f3..986d70caec33 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -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,
--
2.25.1
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH v2 net-next] ethtool: link 10000baseCR to SFF-8431, Appendix-E SFP+ DA
2026-07-03 10:05 [PATCH v2 net-next] ethtool: link 10000baseCR to SFF-8431, Appendix-E SFP+ DA Siddaraju DH
@ 2026-07-03 12:53 ` Maxime Chevallier
0 siblings, 0 replies; 2+ messages in thread
From: Maxime Chevallier @ 2026-07-03 12:53 UTC (permalink / raw)
To: Siddaraju DH, Michal Kubecek, Andrew Lunn, kuba, netdev
Cc: Shubham Das, Balaji Chintalapalle, Vijay Srinivasan,
Magnus Lindberg, Niklas Damberg, Jonas Wirandi, Siddaraju DH
Hi
On 7/3/26 12:05, Siddaraju DH wrote:
> 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>
Maxime
^ permalink raw reply [flat|nested] 2+ messages in thread
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2026-07-03 12:53 ` Maxime Chevallier
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