Re: [Question] Generic way to retrieve IRQ number of Tx/Rx queue

Joe Damato
2025-01-14T23:26:06Z

On Tue, Jan 14, 2025 at 09:32:26AM +0100, Daniel Sedlak wrote:
>
>
> On 1/13/25 10:15 PM, Jakub Kicinski wrote:
> >
> > We do have an API for that
> > https://docs.kernel.org/next/networking/netlink_spec/netdev.html#napi
> > but unfortunately the driver needs to support it, and i40e currently
> > doesn't:
>
> Thank you for the link, I somehow missed that part of netlink...
>
> > $ git grep --files-with-matches netif_napi_set_irq
> > drivers/net/ethernet/amazon/ena/ena_netdev.c
> > drivers/net/ethernet/broadcom/bnxt/bnxt.c
> > drivers/net/ethernet/broadcom/tg3.c
> > drivers/net/ethernet/google/gve/gve_utils.c
> > drivers/net/ethernet/intel/e1000/e1000_main.c
> > drivers/net/ethernet/intel/e1000e/netdev.c
> > drivers/net/ethernet/intel/ice/ice_lib.c
> > drivers/net/ethernet/intel/igc/igc_main.c
> > drivers/net/ethernet/mellanox/mlx4/en_cq.c
> > drivers/net/ethernet/mellanox/mlx5/core/en_main.c
> > drivers/net/ethernet/meta/fbnic/fbnic_txrx.c
> >
> > Should be easy to add. Let me CC the Intel list in case they already
> > have a relevant change queued for i40e..
>
> Thank you for directions, will check Intel's mailing list and poke around
> with implementing that.

I previously tried to add support for this API to i40e [1], but got
pulled into other stuff and never picked it back up. Wanted to
mention it in case it is useful for you.

[1]: https://lore.kernel.org/lkml/20240410043936.206169-1-jdamato@fastly.com/