[Intel-wired-lan] ixgbe-x550 link detection after boot

[Fujinaka, Todd]

The response I got is “can’t do half duplex so the PHY could be happy but the SGMII wont’. Put it in the actual bug tracker”.

I think the best course of action is for you to contact your factory support. Or if you got this retail to contact support at intel.com<mailto:support at intel.com>.

…

Oh, I looked, Mr. Bloom, and I think this is probably a “clone to lan tenant and assign to the QV team” sort of thing. I’m not sure if it’s QV Maciej Bucio or Tools Kamil Bednarski.

Todd Fujinaka
Software Application Engineer
Data Center Group
Intel Corporation
todd.fujinaka at intel.com

From: Intel-wired-lan <intel-wired-lan-bounces at osuosl.org> On Behalf Of Fujinaka, Todd
Sent: Wednesday, July 1, 2020 3:03 PM
To: Paul Stewart <pstew at google.com>; intel-wired-lan at lists.osuosl.org
Subject: Re: [Intel-wired-lan] ixgbe-x550 link detection after boot

That doesn’t sound right. Denverton is x553. But I don’t generally do SOC so let me try to get someone else to look at this.

Todd Fujinaka
Software Application Engineer
Data Center Group
Intel Corporation
todd.fujinaka at intel.com<mailto:todd.fujinaka at intel.com>

From: Intel-wired-lan <intel-wired-lan-bounces at osuosl.org<mailto:intel-wired-lan-bounces at osuosl.org>> On Behalf Of Paul Stewart
Sent: Wednesday, July 1, 2020 2:09 PM
To: intel-wired-lan at lists.osuosl.org<mailto:intel-wired-lan at lists.osuosl.org>
Subject: [Intel-wired-lan] ixgbe-x550 link detection after boot

Hi there.  I have a system with a Denverton based chipset which has a built-in 4 ports of 10GBE.  It's properly configured to enumerate as 8086:15c6 (IXGBE_DEV_ID_X550EM_A_SGMII).  It also successfully detects link to its backplane partner with the stock ixgbe driver, but only if that partner is up and running before the driver starts up.  If the Denverton chipset comes up first, nothing I've tried so far as succeeded in having the chipset detect link.  I've tried the normal "ifconfig down/up", "ethtool -A eth1 autoneg off" etc, but nothing so far seems to do as much as just rebooting the system.  Are there any hints as to how I can get this going?  I've also tried "hw->mac.ops.reset_hw(hw)" and calling "hw->mac.ops.setup_link()" again from the kernel and that surprisingly didn't work either, so I'm getting curious as to what can get the system to re-evaluate link state.  It's really true that the Links status register does not mark the link as up (as shown by ethtool -d).

If it's of any consequence the SGMII link partner is a Marvell 88E1512.  MDIO is not connected.  For its part, the Marvell part detects link from the Denverton whether or not that understanding is reciprocal.
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