Re: [PATCH] PCI: Add no-D3 quirk for Mellanox ConnectX-[45]

On Wed, Jan 09, 2019 at 04:09:02PM +1100, Benjamin Herrenschmidt wrote:

quoted

POWER 8 firmware is good? If the link does eventually come back, is
the POWER8's D3 resumption timeout long enough?

If this doesn't lead to an obvious conclusion you'll probably need to
connect to IBM's Mellanox support team to get more information from
the card side.

We are IBM :-) So far, it seems to be that the card is doing something
not quite right, but we don't know what. We might need to engage
Mellanox themselves.

Sorry, it was unclear, I ment the support team for IBM inside Mellanox
..

There might be internal debugging available that can show if the card
is detecting the beacon, how far it gets in renegotiation, etc.

From all the mails it really has the feel of a PCI-E interop problem between

these two specific chips..

Jason