[0/2] devlink: Support setting max_io_eqs

Message

Parav Pandit April 10, 2024, 7:39 a.m. UTC

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

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

 devlink/devlink.c            | 29 ++++++++++++++++++++++++++++-
 include/uapi/linux/devlink.h |  1 +
 2 files changed, 29 insertions(+), 1 deletion(-)