How to Decode and Modify NVM GB Ethernet Region

[tallu]

Hi

I have WHL CRB with i219-LM (8086:10BD).

I want do disabe power management (PHY PD Ena bit of Shared Init Control Word) but I haven't found the right tool for it.

Can you point to such a tool?

Regards,

Tal

[tallu]

Hi

Anything?

Regards,

Tal

[Mike_Intel]

Hello tallu,

Thank you for posting in Intel Ethernet Communities. 

For us to further check the issue, can you clarify if you are designing a system with embedded i219-LM?

Why do you need to disable the power management?

If you have questions, please let us know. In case we do not hear from you, we will make a follow up after 3 workings days. Thank you.

Best regards,

Michael L.

Intel® Customer Support

[tallu]

Hi Michael

Thanks for replying.

First;, let me provide some background about what I'm trying to do.

I'm checking if it is possible to boot Linux on WHL including Ethernet working (available for communication) in ~3 seconds. For that I have Intel's WHL CRB with SBL (Slim Boot Loader) which loads Linux in ~1.7 seconds. Ethernet is ready in ~6.5 seconds.

I also measured the duration from link down to link up (~4.5 seconds).

I am testing against i219-LM because WHL CRB has i219-LM (8086:15BD) and we intend to use some COMe which has i219-LM.

Are there better options (other Ethernet controllers) for my purpose?

I wanted to cancel PM because I suspect it affects boot time.

Do you have other suggestions how to cut down Ethernet up time?

Regards,

Tal

[Mike_Intel]

Hello tallu,

Thank you for the quick response. I am trying to get your end goal for me to further assist you.

So the end goal here is you want to lessen the boot time of the system by adjusting the power management?

By the way, if you are using a PCIe card, can you provide some photos of the card on both sides focusing on the markings?

If you have questions, please let us know. In case we do not hear from you, we will make a follow up after 3 workings days. Thank you.

Best regards,

Michael L.

Intel® Customer Support

[tallu]

Hi Michael

I'm using Intel's WHL CRB which is described here:

595776-whl-u-rvp-crb-ug-rev1p3.pdf

As far as I understand the MAC is embedded in the chipset and the PHY is connected via PCIe (as can be seen in 595776).

As for my goal, I'm looking to lessen boot time.

If cancelling power management will help to reach that goal I'll do it.

Regards,

Tal

[CarlosAM_INTEL]

Hello, @tallu:

Thank you for contacting Intel Embedded Community.

We sent an email to address related to your forum account with information that may help you.

Best regards,

@CarlosAM_INTEL.

[Mike_Intel]

Hello tallu,

Base on your inquiry, we have specific forum for these issues and I will be transferring this thread for faster response. 

Thank you.

Best regards,

Michael L.

Intel® Customer Support