[PATCH net-next v6 06/14] net: phy: Introduce generic SFP handling for PHY drivers

[Russell King (Oracle)]

On Wed, May 28, 2025 at 09:35:35AM +0200, Romain Gantois wrote:
> > In that regard, you can consider 1000BaseX as a MII mode (we do have
> > PHY_INTERFACE_MODE_1000BASEX).
> > 
> 
> Ugh, the "1000BaseX" terminology never ceases to confuse me, but yes you're 
> right.

1000BASE-X is exactly what is described in IEEE 802.3. It's a PHY
interface mode because PHYs that use SerDes can connect to the host
using SGMII or 1000BASE-X over the serial link.

1000BASE-X's purpose in IEEE 802.3 is as a protocol for use over
fibre links, as the basis for 1000BASE-SX, 1000BASE-LX, 1000BASE-EX
etc where the S, L, E etc are all to do with the properties of the
medium that the electrical 1000BASE-X is sent over. It even includes
1000BASE-CX which is over copper cable.

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