Messages in this thread | | | Subject | Re: [PATCH] PCI: Add no-D3 quirk for Mellanox ConnectX-[45] | From | Alexey Kardashevskiy <> | Date | Wed, 9 Jan 2019 19:14:25 +1100 |
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On 09/01/2019 18:25, Benjamin Herrenschmidt wrote: > On Wed, 2019-01-09 at 17:32 +1100, Alexey Kardashevskiy wrote: >> I have just moved the "Mellanox Technologies MT27700 Family >> [ConnectX-4]" from garrison to firestone machine and there it does not >> produce an EEH, with the same kernel and skiboot (both upstream + my >> debug). Hm. I cannot really blame the card but I cannot see what could >> cause the difference in skiboot either. I even tried disabling NPU so >> garrison would look like firestone, still EEH'ing. > > The systems have a different chip though, firestone is P8 and garrison > is P8', which a slightly different PHB revision. Worth checking if we > have anything significantly different in our inits and poke at the HW > guys.
Nope, we do not have anything different for these machines. Asking HW guys never worked for me :-/
I think the easiest is just doing what we did for PHB4 and ignoring these D3 requests on garrisons.
> BTW. Are the cards behind a switch in either case ?
No, directly connected to the root on both:
garrison:
0000:00:00.0 PCI bridge: IBM Device 03dc (rev ff) 0000:01:00.0 Ethernet controller: Mellanox Technologies MT27700 Family [ConnectX-4] (rev ff) 0000:01:00.1 Ethernet controller: Mellanox Technologies MT27700 Family [ConnectX-4] (rev ff)
firestone (phb #0 is taken by nvidia gpu):
0001:00:00.0 PCI bridge: IBM POWER8 Host Bridge (PHB3) 0001:01:00.0 Ethernet controller: Mellanox Technologies MT27700 Family [ConnectX-4] 0001:01:00.1 Ethernet controller: Mellanox Technologies MT27700 Family [ConnectX-4]
-- Alexey
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