linux-kernel - [RFC net-next 0/2] igc: Link IRQs and queues to NAPIs

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Message-Id: <20241003233850.199495-1-jdamato@fastly.com>
Date: Thu,  3 Oct 2024 23:38:48 +0000
From: Joe Damato <jdamato@...tly.com>
To: netdev@...r.kernel.org
Cc: Joe Damato <jdamato@...tly.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	intel-wired-lan@...ts.osuosl.org (moderated list:INTEL ETHERNET DRIVERS),
	Jakub Kicinski <kuba@...nel.org>,
	linux-kernel@...r.kernel.org (open list),
	Paolo Abeni <pabeni@...hat.com>,
	Przemek Kitszel <przemyslaw.kitszel@...el.com>,
	Tony Nguyen <anthony.l.nguyen@...el.com>
Subject: [RFC net-next 0/2] igc: Link IRQs and queues to NAPIs

Greetings:

This is an RFC to get feedback before submitting an actual series and
because I have a question for igc maintainers, see below.

This series addss support for netdev-genl to igc so that userland apps
can query IRQ, queue, and NAPI instance relationships. This is useful
because developers who have igc NICs (for example, in their Intel NUCs)
who are working on epoll-based busy polling apps and using
SO_INCOMING_NAPI_ID, need access to this API to map NAPI IDs back to
queues.

See the commit messages of each patch for example output I got on my igc
hardware.

My question for maintainers:

In patch 2, the linking should be avoided for XDP queues. Is there a way
to test that somehow in the driver? I looked around a bit, but didn't
notice anything. Sorry if I'm missing something obvious.

Thanks,
Joe

Joe Damato (2):
  igc: Link IRQs to NAPI instances
  igc: Link queues to NAPI instances

 drivers/net/ethernet/intel/igc/igc.h      |  1 +
 drivers/net/ethernet/intel/igc/igc_main.c | 33 ++++++++++++++++++++---
 2 files changed, 30 insertions(+), 4 deletions(-)

-- 
2.25.1