Re: [PATCH net-next 1/3] net: ethtool: Add support for 1600Gbps speed

Hi,

On 17/11/2025 22:18, Tariq Toukan wrote:

From: Yael Chemla <redacted>

Add support for 1600Gbps link modes based on 200Gbps per lane [1].
This includes the adopted IEEE 802.3dj copper and optical PMDs that use
200G/lane signaling [2].

Add the following PMD types:
- KR8 (backplane)
- CR8 (copper cable)
- DR8 (SMF 500m)
- DR8-2 (SMF 2km)

These modes are defined in the 802.3dj specifications.
References:
[1] https://www.ieee802.org/3/dj/public/23_03/opsasnick_3dj_01a_2303.pdf
[2] https://www.ieee802.org/3/dj/projdoc/objectives_P802d3dj_240314.pdf

Signed-off-by: Yael Chemla <redacted>
Reviewed-by: Shahar Shitrit <redacted>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---
 drivers/net/phy/phy-core.c   | 4 +++-
 include/uapi/linux/ethtool.h | 5 +++++
 net/ethtool/common.c         | 8 ++++++++

Can you please also update drivers/net/phy/phy_caps.c :

 -> the link_capabilities array
 -> the speed_duplex_to_capa function

Without this update, phylib will fail to load entirely (by design), cf 
phy_caps_init(). A check was added specifically to catch when new speeds
are added without updating phylib alongside :)

Thanks,

Maxime