netdev - [PATCH v2 0/2] devlink: Support setting max_io

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Message-ID: <20240410115808.12896-1-parav@nvidia.com>
Date: Wed, 10 Apr 2024 14:58:06 +0300
From: Parav Pandit <parav@...dia.com>
To: <netdev@...r.kernel.org>, <dsahern@...nel.org>,
	<stephen@...workplumber.org>
CC: <jiri@...dia.com>, <shayd@...dia.com>, Parav Pandit <parav@...dia.com>
Subject: [PATCH v2 0/2] devlink: Support setting max_io_eqs

Devices send event notifications for the IO queues,
such as tx and rx queues, through event queues.

Enable a privileged owner, such as a hypervisor PF, to set the number
of IO event queues for the VF and SF during the provisioning stage.

example:
Get maximum IO event queues of the VF device::

  $ devlink port show pci/0000:06:00.0/2
  pci/0000:06:00.0/2: type eth netdev enp6s0pf0vf1 flavour pcivf pfnum 0 vfnum 1
      function:
          hw_addr 00:00:00:00:00:00 ipsec_packet disabled max_io_eqs 10

Set maximum IO event queues of the VF device::

  $ devlink port function set pci/0000:06:00.0/2 max_io_eqs 32

  $ devlink port show pci/0000:06:00.0/2
  pci/0000:06:00.0/2: type eth netdev enp6s0pf0vf1 flavour pcivf pfnum 0 vfnum 1
      function:
          hw_addr 00:00:00:00:00:00 ipsec_packet disabled max_io_eqs 32

patch summary:
patch-1 updates devlink uapi
patch-2 adds print, get and set routines for max_io_eqs field

changelog:
v1->v2:
- addressed comments from Jiri
- updated man page for the new parameter
- corrected print to not have EQs value as optional
- replaced 'value' with 'EQs'

Parav Pandit (2):
  uapi: Update devlink kernel headers
  devlink: Support setting max_io_eqs

 devlink/devlink.c            | 29 ++++++++++++++++++++++++++++-
 include/uapi/linux/devlink.h |  1 +
 man/man8/devlink-port.8      | 12 ++++++++++++
 3 files changed, 41 insertions(+), 1 deletion(-)

-- 
2.26.2