Commit a21cf0a8 authored by Danielle Ratson's avatar Danielle Ratson Committed by David S. Miller
Browse files

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



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: default avatarDanielle Ratson <danieller@mellanox.com>
Reviewed-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 622d3e92

drivers/net/ethernet/mellanox/mlxsw/core.c

+1 −0
Original line number Diff line number Diff line
@@ -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;

include/net/devlink.h

+2 −0
Original line number Diff line number Diff line
@@ -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 {

include/uapi/linux/devlink.h

+2 −0
Original line number Diff line number Diff line
@@ -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,

net/core/devlink.c

+4 −0
Original line number Diff line number Diff line
@@ -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) {