On Tue, Oct 20, 2015 at 3:02 PM, Andrei Borzenkov <[email protected]> wrote: > 20.10.2015 17:30, Jordan Hargrave пишет: > >> On Tue, Oct 20, 2015 at 1:15 AM, Andrei Borzenkov <[email protected]> >> wrote: >>> >>> On Tue, Oct 20, 2015 at 7:46 AM, Jordan Hargrave <[email protected]> >>> wrote: >>>> >>>> On Mon, Mar 2, 2015 at 1:17 PM, Tom Gundersen <[email protected]> wrote: >>>>> >>>>> Hi Jordan, >>>>> >>>>> On Mon, Mar 2, 2015 at 4:45 PM, Jordan Hargrave <[email protected]> >>>>> wrote: >>>>>> >>>>>> There are currently two competing naming mechanisms for network cards, >>>>>> biosdevname and systemd. Systemd currently has some limitations on >>>>>> naming >>>>>> cards that use network partitioning or support SR-IOV. >>>>> >>>>> >>>>> Could you point to an example so we can fix it? I thought all bug >>>>> reports had been handled, but maybe I lost track of something. >>>>> >>>> >>>> I have a quad-port NIC: >>>> 0000:40:00.0 = PCIE bridge (SMBIOS Slot 2) >>>> 0000:41:00.0 = Ethernet Device (port1) >>>> 0000:41:00.1 = Ethernet Device (port2) >>>> 0000:42:00.0 = Ethernet Device (port3) >>>> 0000:42:00.1 = Ethernet Device (port4) >>>> >>>> biosdevname would name these p2p1, p2p2, p2p3, p2p4 respectively. >>>> >>> >>> How does it determine that 41 and 42 are the same device? I.e. how >>> does it differ from real bridge with two independent two-port cards >>> behind? Could you explain what information it is using? Is it exported >>> in sysfs? >>> >>> ... >> >> >> It knows they are on the same slot as the parent device has SMBIOS >> Slot#2 (Type 9). So all child devices of a physical slot are on the >> same card. I'm currently using a patch to systemd that reads SMBIOS >> type 9. There isn't a kernel sysfs variable that displays this. >> > > This gives us slot ID, but how do we know which of function 0 on this slot > ID is port 0 and which is port 2? There is nothing in SMBIOS description of > Type 9 that answers it.
Dell cards have an encoding in PCI VPD (DCM) that maps a PCI DevFn to port and instance. Here's an example system with loaded Qlogic, Broadcom, Intel cards. Intel supports SR-IOV ==== DCM1001009d7F1402009d7F2101009d7F2502009d7F32010089154301008915 0000:01:00.0 port=1 instance=1 0000:01:00.4 port=1 instance=2 0000:01:00.1 port=2 instance=1 0000:01:00.5 port=2 instance=2 0000:01:00.2 port=3 instance=1 0000:01:00.3 port=4 instance=1 ==== DCM100100015F120200015F140300015F160400015F210100015F230200015F250300015F270400015F 0000:41:00.0 port=1 instance=1 0000:41:00.2 port=1 instance=2 0000:41:00.4 port=1 instance=3 0000:41:00.6 port=1 instance=4 0000:41:00.1 port=2 instance=1 0000:41:00.3 port=2 instance=2 0000:41:00.5 port=2 instance=3 0000:41:00.7 port=2 instance=4 ==== DCM10010081D521010081D5 0000:43:00.0 port=1 instance=1 0000:43:00.1 port=2 instance=1 LSPCI has the following ethernet devices. 0000:01:00.0 = Broadcom, port 1, instance 1 0000:01:00.1 port 2, instance 1 0000:01:00.2 port 3 0000:01:00.3 port 4 0000:01:00.4 port 1, instance 2 0000:01:00.5 port 2, instance 2 0000:41:00.0 = QLogic (PCIE slot 5), port 1, instance 1 0000:41:00.1 = port 2, instance 1 0000:41:00.2 = port 1, instance 2 0000:41:00.3 = port 2, instance 2 0000:41:00.4 = port 1, instance 3 0000:41:00.5 = port 2, instance 3 0000:41:00.6 = port 1, instance 4 0000:41:00.7 = port 2, instance 4 0000:43:00.0 = Intel (PCIE slot 2), port 1 0000:43:00.1 port 2 0000:43:10.0 vf port 1, instance 0 0000:43:10.1 vf port 2, instance 0 0000:43:10.2 vf port 1, instance 1 0000:43:10.3 vf port 2, instance 1 0000:43:10.4 vf port 1, instance 2 0000:43:10.5 vf port 2, instance 2 0000:43:10.6 vf port 1, instance 3 0000:43:10.7 vf port 2, instance 3 0000:43:11.0 vf port 1, instance 4 0000:43:11.1 etc.. 0000:43:11.2 0000:43:11.3 0000:43:11.4 0000:43:11.5 0000:43:11.6 0000:43:11.7 0000:43:12.0 0000:43:12.1 0000:43:12.2 0000:43:12.3 0000:43:12.4 0000:43:12.5 0000:43:12.6 0000:43:12.7 0000:43:13.0 0000:43:13.1 0000:43:13.2 0000:43:13.3 0000:43:13.4 0000:43:13.5 0000:43:13.6 0000:43:13.7 0000:43:14.0 0000:43:14.1 0000:43:14.2 0000:43:14.3 0000:43:14.4 0000:43:14.5 0000:43:14.6 0000:43:14.7 0000:43:15.0 0000:43:15.1 0000:43:15.2 0000:43:15.3 0000:43:15.4 0000:43:15.5 0000:43:15.6 0000:43:15.7 0000:43:16.0 0000:43:16.1 0000:43:16.2 0000:43:16.3 0000:43:16.4 0000:43:16.5 0000:43:16.6 0000:43:16.7 0000:43:17.0 0000:43:17.1 0000:43:17.2 0000:43:17.3 0000:43:17.4 0000:43:17.5 0000:43:17.6 0000:43:17.7 _______________________________________________ systemd-devel mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/systemd-devel
