Re: [PATCH net-next 10/16] idpf: add support for nointerrupt queues

[Alexander Lobakin]

From: Maciej Fijalkowski <maciej.fijalkowski@xxxxxxxxx>
Date: Fri, 7 Mar 2025 13:10:29 +0100

> On Wed, Mar 05, 2025 at 05:21:26PM +0100, Alexander Lobakin wrote:
>> Currently, queues are associated 1:1 with interrupt vectors as it's
>> assumed queues are always interrupt-driven.
>> In order to use a queue without an interrupt, idpf still needs to have
>> a vector assigned to it to flush descriptors. This vector can be global
>> and only one for the whole vport to handle all its noirq queues.
>> Always request one excessive vector and configure it in non-interrupt
>> mode right away when creating vport, so that it can be used later by
>> queues when needed.
> 
> Description sort of miss the purpose of this commit, you don't ever
> mention that your design choice for XDP Tx queues is to have them
> irq-less.

Because this is not directly related to XDP and maybe some time later
more code could make use of noirq queues, who knows :>

But I'll mention why this is needed, ok.

> 
>>
>> Co-developed-by: Michal Kubiak <michal.kubiak@xxxxxxxxx>
>> Signed-off-by: Michal Kubiak <michal.kubiak@xxxxxxxxx>
>> Signed-off-by: Alexander Lobakin <aleksander.lobakin@xxxxxxxxx>
>> ---
>>  drivers/net/ethernet/intel/idpf/idpf.h        |  8 +++
>>  drivers/net/ethernet/intel/idpf/idpf_txrx.h   |  4 ++
>>  drivers/net/ethernet/intel/idpf/idpf_dev.c    | 11 +++-
>>  drivers/net/ethernet/intel/idpf/idpf_lib.c    |  2 +-
>>  drivers/net/ethernet/intel/idpf/idpf_txrx.c   |  8 +++
>>  drivers/net/ethernet/intel/idpf/idpf_vf_dev.c | 11 +++-
>>  .../net/ethernet/intel/idpf/idpf_virtchnl.c   | 53 +++++++++++++------
>>  7 files changed, 79 insertions(+), 18 deletions(-)

Thanks,
Olek