DPDK port concept in rte_eth_dev

[Stephen Hemminger]

On Wed, 17 Aug 2022 11:28:20 +0000
Mikael R Carlsson <Mikael.R.Carlsson at tietoevry.com> wrote:

> Hi!
> 
> Sorry for asking such a basic question but I have a hard time understanding the "port" concept in rte_eth_dev.
> 
> I am using 2 VFs on the same physical port on a NIC, VF7 and VF6. These to VFs have there own unique PCI address. When I call rte_eth_dev_get_port_by_name, I suspect that I get the same port id from both PCI addresses (not sure here, still looking into this)
> 
> Could someone please give me a short explanation of the "port" concept in rte_eth_dev, and how that correlates to PCI address and also eth_dev_rx_burst assuming you want to poll only from VF7 for example.
> 
> Thanks in advance!
> 
>   / Mikael
> 

DPDK ethdev port is more of an object index (like Linux file handle).
It can refer to many different types of devices.