05/06/2023 16:03, Ivan Malov: > Hi Thomas, > > Thanks for responding. Please see below. > > On Mon, 5 Jun 2023, Thomas Monjalon wrote: > > > Hello, > > > > 05/06/2023 15:09, Ivan Malov: > >> Dear community, > >> > >> Is there any means in DPDK to discover relationship between > >> network/physical ports of the given adapter/board and > >> etdevs deployed in DPDK application on top of it? > >> > >> For example, in Linux, there are facilities like > >> > >>> /sys/class/net/<iface>/phys_port_name > >>> /sys/class/net/<iface>/dev_port > >> > >> and > >> > >>> devlink port show > >> > >> Do we have something similar in DPDK? > > > > We can get the device name of a port: > > rte_eth_dev_get_name_by_port() > > I'm afraid this won't do. Consider the following example. > Say, there's a NIC with two network ports and two PFs, > 0000:01:00.0 and 0000:01:00.1. The user plugs these > PFs to DPDK application. The resulting ethdev IDs > are 0 and 1. If the user invokes the said API, > they will get 0000:01:00.0 and 0000:01:00.1. > But that's not what is really needed. > > We seek a means to get the network port ID by > ethdev ID. For example, something like this: > - get_netport_by_ethdev(0) => 0 > - get_netport_by_ethdev(1) => 1 > > If two different PCI functions are associated with the > same network port (0, for instance), this should be > - get_netport_by_ethdev(0) => 0 > - get_netport_by_ethdev(1) => 0 > > Do we have something like that in DPDK?
No we don't have such underlying index. I don't understand why it is needed. To me the name is more informative than a number. > >> If no, would the feature be worthwhile implementing? > > > > We may have discrepancies in different device classes. > > I mean precisely "ethdev"s. I do realise, though, that > an ethdev may be backed by a vdev (af_xdp, etc.) = in > such cases the assumed "get_netport" method could > just return (-ENOTSUP). What do you think? Are you interested only in PCI devices? Looks limited. > > Feel free to make a global status of device names. > > > Could you please elaborate on this? I thought you wanted to have device name in all device classes.
