Update sfp_compatibility.rst and ice driver tunable

[paolba]

only worked after enabling the ice modules with the tunables. maybe add an information about this to the documentation. I only found this info in the forums. without the tunables i was only able to get a 10Gbase connection when setting the speed on the switch.

tunables:
if_ice_load="YES"
ice_ddp_load="YES"

reboot after setting the tunables. nothing more is needed.

source:
https://forum.opnsense.org/index.php?topic=30759.0

[AdSchellevis]

you can add ice_ddp_load to the tunables, ice_load shouldn't be needed if I'm not mistaken as the module is loaded by default (our default factory default config files only include ice_ddp_load)

[paolba]

you can add ice_ddp_load to the tunables, ice_load shouldn't be needed if I'm not mistaken as the module is loaded by default (our default factory default config files only include ice_ddp_load)

thanks for the hint! I can confirm 25Gbase still working after removing the tunable "if_ice_load". Do you know why "ice_ddp_load" is necessary and why this is not enabled by default?

[AdSchellevis]

it's an intel driver thing, firmware is only loaded when requested (the driver works without it, but very slow)