On Wed, Dec 5, 2018 at 11:11 PM Jakub Kicinski <jakub.kicin...@netronome.com> wrote: > > On Wed, 5 Dec 2018 22:41:43 -0800, Michael Chan wrote: > > > > It will be in the BIOS only for a LOM, I think. For a NIC, it should > > be in the NIC's NVRAM. > > This is all vague. Could you please clearly state the use case. > Well, the WoL setting's use case should be quite simple, right? If the card's NVRAM WoL setting is ON, when you plug the card in a slot that has Vaux power, it will assert PME# when a magic packet is received. Again, the WoL setting in this context is similar to other power up settings such as PCIe Gen2 or Gen3.
Let's say the power up setting is ON and it boots up to Linux for the first time after receiving a magic packet. The Linux user can then run ethtool -s to set the driver's non persistent WoL setting. It can be the same as the NVRAM's power up setting, or different. Ethtool may support additional WoL packet types that the power up setting does not support. Let's say the Linux user sets the ethtool WoL setting to OFF and shuts down the system. That card now will not wake up the system. But if there is a power failure and power comes back on later, the card will lose the ethtool setting and go back to the power up WoL setting, which is ON in this example.
