What I need to do, is to be able to associate each network interface to its corresponding network port in a predictable manner, across reboots and even if network modules are added, removed, or replaced. This way, the info exposed in /sys/bus/pci/slots should allow us to map it to one or more devices plugged in using either the device ID or the particular pci bus number/device number/fn. On Fri, Mar 21, 2014 at 6:35 PM, Bjorn Helgaas <bhelgaas@xxxxxxxxxx> wrote: > On Fri, Mar 21, 2014 at 3:47 PM, Cristina Olariu <colariu@xxxxxxxxx> wrote: > >> https://bugzilla.kernel.org/show_bug.cgi?id=72681 > >>>>> On Fri, Mar 21, 2014 at 11:56 AM, Cristina Olariu <colariu@xxxxxxxxx> >>>>> wrote: >>>>> > >>>>> > I was trying to use the pci_slot module in order to associate a network >>>>> > interface to its corresponding network port by matching devices with >>>>> > physical slot information. >>>>> > >>>>> > Unfortunately the PCIe slots on our platform don't support the hot-plug >>>>> > function and the pci_slot module doesn't expose the slots interface in >>>>> > sysfs. >>>>> > >>>>> > Is there another way to list devices by physical add-in slots? We are >>>>> > using >>>>> > kernel version 3.4.67. >>>>> > Any pointers you may be able to offer would be appreciated. > > Your lspci (from the bugzilla mentioned above) shows 12 devices that > claim to have a slot, based on the PCIe Capabilities Register, but > most of them have a "Physical Slot Number" of zero: > > 00:01.0 Intel Root Port Slot #0 to [bus 01] > 00:02.0 Intel Root Port Slot #0 to [bus 02] > 00:02.2 Intel Root Port Slot #0 to [bus 03-09] > 00:03.0 Intel Root Port Slot #0 to [bus 0a-0b] > 00:03.1 Intel Root Port Slot #0 to [bus 0c-0d] > 00:03.2 Intel Root Port Slot #0 to [bus 0e] > 00:1c.0 Intel Root Port Slot #0 to [bus 10] > 00:1c.1 Intel Root Port Slot #0 to [bus 11] > 00:1c.2 Intel Root Port Slot #0 to [bus 12] > 04:00.0 PLX Downstream Port Slot #0 to [bus 05-06] > 04:01.0 PLX Downstream Port Slot #1 to [bus 07-08] > 04:08.0 PLX Downstream Port Slot #8 to [bus 09] > > 03:00.0 PLX Upstream Port to [bus 04-09] > 05:00.0 Intel 82599ES 10G NIC (in Slot #0) > 07:00.0 Intel 82599ES 10G NIC (in Slot #1) > > My guess is that the ones you care about are the slots connected to > the PLX Downstream Ports, but I don't know how to make a rule about > which ones we should expose. I think the slot code can disambiguate > them by adding a suffix, so I guess one possibility is to expose them > all as, e.g., "0", "0-1", "0-2", "0-3", etc. Then you'd end up with > the PLX Downstream Port slots being "0-9", "1", and "8", which seems > sort of ugly. > > What's the network port information you want to match up with these > slot numbers? > > Bjorn -- CRISTINA OLARIU * Elfiq Networks * Software Developer T. 514.667.0611 x 821 * E. colariu@xxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
