On Mon, 21 Aug 2017 23:09:55 +0200 Torbjorn Jansson <torbjorn.jans...@mbox200.swipnet.se> wrote:
> On 2017-08-21 19:56, Torbjorn Jansson wrote: > > On 2017-08-19 07:37, Torbjorn Jansson wrote: > >> On 2017-08-19 02:34, taii...@gmx.com wrote: > >>> On 08/15/2017 02:12 AM, Torbjorn Jansson wrote: > >>> > >>>> On 2017-08-15 02:44, taii...@gmx.com wrote: > >>>>> On 08/14/2017 12:28 AM, Torbjorn Jansson wrote: > >>>>> > >>>>>> yes i noticed that part was missing, but the card i have is an I350-T2 > >>>>>> and according to: > >>>>>> https://www.intel.com/content/www/us/en/support/network-and-i-o/ethernet-products/000005722.html > >>>>>> > >>>>>> > >>>>>> > >>>>>> the I350-T2 is supposed to have sr-iov support. > >>>>>> i guess it is possible they sent me the wrong type of card or > >>>>>> something, > >>>>>> i'll double check what is listed on the card itself. > >>>>> Some OEM's (ex: dell) shut off the SR-IOV ability on their NIC's > >>>>> because > >>>>> reasons. > >>>>> Please provide an lspci -n and lspci -v -v for that device so we can > >>>>> see > >>>>> what OEM it is. > >>>>> > >>>>> I would return it and have them send you a real one that isn't nerfed, > >>>>> also FYI most NIC's on ebay are counterfeit so be careful what you buy. > >>>>> https://www.servethehome.com/investigating-fake-intel-i350-network-adapters/ > >>>>> > >>>>> (real intel NIC ASIC and SR-IOV but crappy secondary components) > >>>>> > >>>> > >>>> if i look at the back of the card there is a sticker with: I350T2V2 > >>>> > >>>> here is the output: > >>> Weird. > >>> I would say you almost definitely got a fake - either way send it back. > >>> > >> > >> yes very strange. > >> thing is, i bought it from a well known web shop I've been using forever. > >> i have opened a support ticket with them about this, hopefully i can > >> return it. > >> > >> but then question is, how do i find a network card with sr-iov that works? > >> clearly specs on web shops can't always be trusted. > >> > >> also strange is that this page: > >> http://ark.intel.com/products/84804/Intel-Ethernet-Server-Adapter-I350-T2V2 > >> clearly lists sr-iov and this is the model i got. > >> > > > > i did a bit more searching and checking. > > found this pdf: > > https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/ethernet-controller-i350-datasheet.pdf > > > > > > section 6.2.25 looks interesting specifically the IOV Enable bit. > > > > i used ethtool to dump the eeprom to file and a hex editor to check the > > contents and this bit is set to a zero indicating IOV is not exposed. > > > > but i'm definitely no expert on these things so i might be wrong too. > > but i wonder if there is a way to flip this bit and see what happens. > > > > i fixed it :) > i figured out how to use ethtool to flip the bit, rebooted and: > ------- > 03:00.0 Ethernet controller: Intel Corporation I350 Gigabit Network > Connection > (rev 01) > Subsystem: Intel Corporation Ethernet Server Adapter I350-T2 > Physical Slot: 6-1 > Flags: bus master, fast devsel, latency 0, IRQ 61, NUMA node 0 > Memory at fad00000 (32-bit, non-prefetchable) [size=1M] > Memory at fae04000 (32-bit, non-prefetchable) [size=16K] > Capabilities: [40] Power Management version 3 > Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+ > Capabilities: [70] MSI-X: Enable+ Count=10 Masked- > Capabilities: [a0] Express Endpoint, MSI 00 > Capabilities: [100] Advanced Error Reporting > Capabilities: [140] Device Serial Number a0-36-9f-ff-ff-ed-43-b0 > Capabilities: [150] Alternative Routing-ID Interpretation (ARI) > Capabilities: [160] Single Root I/O Virtualization (SR-IOV) > Capabilities: [1a0] Transaction Processing Hints > Capabilities: [1c0] Latency Tolerance Reporting > Capabilities: [1d0] Access Control Services > Kernel driver in use: igb > Kernel modules: igb > ------- > as you can see above sr-iov is now listed in lspci, needed sriov entries is > now > listed under /sys and i can enable the virtual cards. > had to blacklist igbvf and libvirt kept complaining until i added the virtual > cards to vfio too. > > so now i finally got it all working and have a vm with a virtual card. > > but i think it is really stupid of the manufacture(s) (intel?) to disable > sr-iov in the eeprom and not provide any proper tool or documentation on how > to > enable it. Would you be so kind as to write-up instructions how you used ethtool to resolve this so that others don't need to re-invent your solution? Thanks, Alex _______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
