netdev - [net-next/RFC PATCH v1 0/4] Introduce napi queues support

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Date: Thu, 01 Jun 2023 10:42:20 -0700
From: Amritha Nambiar <amritha.nambiar@...el.com>
To: netdev@...r.kernel.org, kuba@...nel.org, davem@...emloft.net
Cc: sridhar.samudrala@...el.com, amritha.nambiar@...el.com
Subject: [net-next/RFC PATCH v1 0/4] Introduce napi queues support

Introduce support for associating napi instances with
corresponding RX and TX queue set. Add the capability
to export napi information supported by the device.
Extend the netdev_genl generic netlink family for netdev
with napi data. The napi fields exposed are:
- napi id
- queue/queue-set (both RX and TX) associated with each
  napi instance

Additional napi fields such as PID association for napi
thread etc. can be supported in a follow-on patch set.

This series only supports 'get' ability for retrieving
napi fields (specifically, napi ids and queue[s]). The 'set'
ability for setting queue[s] associated with a napi instance
via netdev-genl will be submitted as a separate patch series.

Previous discussion at:
https://lore.kernel.org/netdev/c8476530638a5f4381d64db0e024ed49c2db3b02.camel@gmail.com/T/#m00999652a8b4731fbdb7bf698d2e3666c65a60e7

$ ./cli.py --spec netdev.yaml  --do dev-get --json='{"ifindex": 12}'
[{'ifindex': 12,
  'xdp-features': {'xsk-zerocopy', 'basic', 'rx-sg', 'redirect'}},
 {'napi-info': [{'napi-id': 600, 'rx-queues': [7], 'tx-queues': [7]},
                {'napi-id': 599, 'rx-queues': [6], 'tx-queues': [6]},
                {'napi-id': 598, 'rx-queues': [5], 'tx-queues': [5]},
                {'napi-id': 597, 'rx-queues': [4], 'tx-queues': [4]},
                {'napi-id': 596, 'rx-queues': [3], 'tx-queues': [3]},
                {'napi-id': 595, 'rx-queues': [2], 'tx-queues': [2]},
                {'napi-id': 594, 'rx-queues': [1], 'tx-queues': [1]},
                {'napi-id': 593, 'rx-queues': [0], 'tx-queues': [0]}]}]

---

Amritha Nambiar (4):
      net: Introduce new napi fields for rx/tx queues
      net: Add support for associating napi with queue[s]
      netdev-genl: Introduce netdev dump ctx
      netdev-genl: Add support for exposing napi info from netdev


 Documentation/netlink/specs/netdev.yaml   |   39 ++++
 drivers/net/ethernet/intel/ice/ice_lib.c  |   57 ++++++
 drivers/net/ethernet/intel/ice/ice_lib.h  |    4 
 drivers/net/ethernet/intel/ice/ice_main.c |    4 
 include/linux/netdevice.h                 |   18 ++
 include/uapi/linux/netdev.h               |    4 
 net/core/dev.c                            |   55 ++++++
 net/core/netdev-genl.c                    |  261 ++++++++++++++++++++++++-----
 tools/include/uapi/linux/netdev.h         |    4 
 9 files changed, 402 insertions(+), 44 deletions(-)

--