LayerscapeのトピックRe: LS1012A PFE in phy-less direct mode

LS1012A PFE in phy-less direct mode

dolphin1 — Tue, 21 May 2019 15:08:05 GMT

Hi,

Will the pfe support making a phy-less connection from the LS1012A pfe to a Ethernet switch (VSC7421) in SGMII direct mode? https://www.kernel.org/doc/Documentation/devicetree/bindings/net/fixed-link.txt

|———————————| |——————————|

| —|———— SGMII ————|— |

| LS1012A | | VSC7421 |

|———————————| |——————————|

NO MDIO

Thanks!

ufedor — Tue, 21 May 2019 18:30:50 GMT

Technically, direct MAC-to-MAC connection over SGMII is possible for the LS1012A.

The PFE is not aware about the external connection type.

Refer to the QorIQ LS1012A Reference Manual, 28.5.13 Protocol Configuration Register 8 (PCCR8):
"Field
SGMIIA_KX
SGMIIb 1000Base-KX Configuration:

Note: this configuration bit must be set before performing any MDIO initialization of the PCS.
0b - SGMII mode
1b - 1000Base-KX mode"

dolphin1 — Tue, 21 May 2019 20:05:02 GMT

Ok. Thanks!