RE: [Intel-wired-lan] [PATCH iwl-next v5 07/13] idpf: add support for nointerrupt queues

-----Original Message-----
From: Intel-wired-lan <redacted> On Behalf Of
Alexander Lobakin
Sent: Tuesday, August 26, 2025 9:25 PM
To: intel-wired-lan@lists.osuosl.org
Cc: Lobakin, Aleksander <aleksander.lobakin@intel.com>; Kubiak, Michal
[off-list ref]; Fijalkowski, Maciej
[off-list ref]; Nguyen, Anthony L
[off-list ref]; Kitszel, Przemyslaw
[off-list ref]; Andrew Lunn [off-list ref];
David S. Miller [off-list ref]; Eric Dumazet
[off-list ref]; Jakub Kicinski [off-list ref]; Paolo Abeni
[off-list ref]; Alexei Starovoitov [off-list ref]; Daniel
Borkmann [off-list ref]; Simon Horman [off-list ref];
NXNE CNSE OSDT ITP Upstreaming
[off-list ref]; bpf@vger.kernel.org;
netdev@vger.kernel.org; linux-kernel@vger.kernel.org
Subject: [Intel-wired-lan] [PATCH iwl-next v5 07/13] idpf: add support for
nointerrupt queues

Currently, queues are associated 1:1 with interrupt vectors as it's assumed
queues are always interrupt-driven. For XDP, we want to use Tx queues
without interrupts and only do "lazy" cleaning when the number of free
elements is <= threshold (closest pow-2 to 1/4 of the ring).
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 (not only XDP ones).

Co-developed-by: Michal Kubiak <redacted>
Signed-off-by: Michal Kubiak <redacted>
Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
---
 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   | 54 ++++++++++++++-----
 7 files changed, 81 insertions(+), 17 deletions(-)

Tested-by: R,Ramu <redacted>