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devlink: Add a new devlink port lanes attribute and pass to netlink

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Add a new devlink port attribute that indicates the port's number of lanes.

Drivers are expected to set it via devlink_port_attrs_set(), before
registering the port.

The attribute is not passed to user space in case the number of lanes is
invalid (0).

Signed-off-by: Danielle Ratson <danieller@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Danielle Ratson 2020-07-09 16:18:18 +03:00 committed by David S. Miller
parent 622d3e9201
commit a21cf0a833
4 changed files with 9 additions and 0 deletions
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1
drivers/net/ethernet/mellanox/mlxsw/core.c
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@ -2134,6 +2134,7 @@ static int __mlxsw_core_port_init(struct mlxsw_core *mlxsw_core, u8 local_port,
int err;
attrs.split = split;
attrs.lanes = lanes;
attrs.flavour = flavour;
attrs.phys.port_number = port_number;
attrs.phys.split_subport_number = split_port_subnumber;

2
include/net/devlink.h
View File

@ -68,10 +68,12 @@ struct devlink_port_pci_vf_attrs {
* struct devlink_port_attrs - devlink port object
* @flavour: flavour of the port
* @split: indicates if this is split port
* @lanes: maximum number of lanes the port supports. 0 value is not passed to netlink.
* @switch_id: if the port is part of switch, this is buffer with ID, otherwise this is NULL
*/
struct devlink_port_attrs {
u8 split:1;
u32 lanes;
enum devlink_port_flavour flavour;
struct netdev_phys_item_id switch_id;
union {

2
include/uapi/linux/devlink.h
View File

@ -455,6 +455,8 @@ enum devlink_attr {
DEVLINK_ATTR_INFO_BOARD_SERIAL_NUMBER, /* string */
DEVLINK_ATTR_PORT_LANES, /* u32 */
/* add new attributes above here, update the policy in devlink.c */
__DEVLINK_ATTR_MAX,

4
net/core/devlink.c
View File

@ -530,6 +530,10 @@ static int devlink_nl_port_attrs_put(struct sk_buff *msg,
if (!devlink_port->attrs_set)
return 0;
if (attrs->lanes) {
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_LANES, attrs->lanes))
return -EMSGSIZE;
}
if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour))
return -EMSGSIZE;
switch (devlink_port->attrs.flavour) {