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cc10mr5148597plb.165.1547021672962; Wed, 09 Jan 2019 00:14:32 -0800 (PST) Received: from [10.61.2.175] ([122.99.82.10]) by smtp.gmail.com with ESMTPSA id t87sm232009895pfk.122.2019.01.09.00.14.27 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 09 Jan 2019 00:14:32 -0800 (PST) Subject: Re: [PATCH] PCI: Add no-D3 quirk for Mellanox ConnectX-[45] To: Benjamin Herrenschmidt , David Gibson References: <20181206041951.22413-1-david@gibson.dropbear.id.au> <20181206064509.GM15544@mtr-leonro.mtl.com> <20190104034401.GA2801@umbus.fritz.box> <20190105175116.GB14238@ziepe.ca> <20190108040129.GE5336@ziepe.ca> <012d24d58a542ed44c8af9f517f1bd61ab912037.camel@kernel.crashing.org> <20190109053045.GE6682@umbus.fritz.box> <23e44611-7eec-b57c-c5a0-6c3b96133a9e@ozlabs.ru> <1cf957e55f9587cb5aba557d0e723deaa5358fe1.camel@kernel.crashing.org> From: Alexey Kardashevskiy Openpgp: preference=signencrypt Autocrypt: addr=aik@ozlabs.ru; keydata= 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Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Leon Romanovsky , saeedm@mellanox.com, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, sbest@redhat.com, Jason Gunthorpe , alex.williamson@redhat.com, paulus@samba.org, linux-pci@vger.kernel.org, bhelgaas@google.com, ogerlitz@mellanox.com, linuxppc-dev@lists.ozlabs.org, davem@davemloft.net, tariqt@mellanox.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" 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