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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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14
include/net/devlink.h
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@@ -1602,6 +1602,14 @@ void devlink_free(struct devlink *devlink);
* capability. Should be used by device drivers to
* enable/disable ipsec_packet capability of a
* function managed by the devlink port.
* @port_fn_max_io_eqs_get: Callback used to get port function's maximum number
* of event queues. Should be used by device drivers to
* report the maximum event queues of a function
* managed by the devlink port.
* @port_fn_max_io_eqs_set: Callback used to set port function's maximum number
* of event queues. Should be used by device drivers to
* configure maximum number of event queues
* of a function managed by the devlink port.
*
* Note: Driver should return -EOPNOTSUPP if it doesn't support
* port function (@port_fn_*) handling for a particular port.
@@ -1651,6 +1659,12 @@ struct devlink_port_ops {
int (*port_fn_ipsec_packet_set)(struct devlink_port *devlink_port,
bool enable,
struct netlink_ext_ack *extack);
int (*port_fn_max_io_eqs_get)(struct devlink_port *devlink_port,
u32 *max_eqs,
struct netlink_ext_ack *extack);
int (*port_fn_max_io_eqs_set)(struct devlink_port *devlink_port,
u32 max_eqs,
struct netlink_ext_ack *extack);
};
void devlink_port_init(struct devlink *devlink,