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devlink: Support setting max_io_eqs

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Many 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

Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Shay Drory <shayd@nvidia.com>
Signed-off-by: Parav Pandit <parav@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Parav Pandit
2024-04-06 04:05:37 +03:00
committed by David S. Miller
parent 4308811ba9
commit 5af3e3876d
4 changed files with 101 additions and 0 deletions
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1
include/uapi/linux/devlink.h
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@@ -686,6 +686,7 @@ enum devlink_port_function_attr {
DEVLINK_PORT_FN_ATTR_OPSTATE, /* u8 */
DEVLINK_PORT_FN_ATTR_CAPS, /* bitfield32 */
DEVLINK_PORT_FN_ATTR_DEVLINK, /* nested */
DEVLINK_PORT_FN_ATTR_MAX_IO_EQS, /* u32 */
__DEVLINK_PORT_FUNCTION_ATTR_MAX,
DEVLINK_PORT_FUNCTION_ATTR_MAX = __DEVLINK_PORT_FUNCTION_ATTR_MAX - 1