Re: thunderx sgmii interface hang

Currently I'm not using the DP83867_PHY driver (after verifying the
issue occurs with or without that driver).

It does not occur if I limit UDP (ie 950mbps). I disabled all offloads
and the issue still occurs.

I'm told that the particular Cavium reference board with an SGMII phy
doesn't show this issue (I don't have that specific board to do my own
testing or comparisons against our board) so I'm inclined to think it
has something to do with an interaction with the DP83867 PHY. I would
like to start poking at PHY registers to see if I can find anything
unusual. The best way to do that from userspace is via
SIOCGMIIREG/SIOCSMIIREG right? The thunderx nic doesn't currently
support ioctl's so I guess I'll have to add that support unless
there's a way to get at phy registers from userspace through a phy
driver?

phy_mii_ioctl() does what you need, and is simple to use.

mii-tool will then give you access to the standard PHY registers.

	 Andre