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net/devlink: Support querying hardware address of port function

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PCI PF and VF devlink port can manage the function represented by
a devlink port.

Enable users to query port function's hardware address.

Example of a PCI VF port which supports a port function:
$ 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 00:11:22:33:44:66

$ devlink port show pci/0000:06:00.0/2 -jp
{
    "port": {
        "pci/0000:06:00.0/2": {
            "type": "eth",
            "netdev": "enp6s0pf0vf1",
            "flavour": "pcivf",
            "pfnum": 0,
            "vfnum": 1,
            "function": {
                "hw_addr": "00:11:22:33:44:66"
            }
        }
    }
}

Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Parav Pandit
2020-06-19 03:32:48 +00:00
committed by David S. Miller
parent a829eb0d5d
commit 2a916ecc40
3 changed files with 67 additions and 0 deletions
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10
include/uapi/linux/devlink.h
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@@ -451,6 +451,8 @@ enum devlink_attr {
DEVLINK_ATTR_TRAP_POLICER_RATE, /* u64 */
DEVLINK_ATTR_TRAP_POLICER_BURST, /* u64 */
DEVLINK_ATTR_PORT_FUNCTION, /* nested */
/* add new attributes above here, update the policy in devlink.c */
__DEVLINK_ATTR_MAX,
@@ -497,4 +499,12 @@ enum devlink_resource_unit {
DEVLINK_RESOURCE_UNIT_ENTRY,
};
enum devlink_port_function_attr {
DEVLINK_PORT_FUNCTION_ATTR_UNSPEC,
DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR, /* binary */
__DEVLINK_PORT_FUNCTION_ATTR_MAX,
DEVLINK_PORT_FUNCTION_ATTR_MAX = __DEVLINK_PORT_FUNCTION_ATTR_MAX - 1
};
#endif /* _UAPI_LINUX_DEVLINK_H_ */