@@ -1374,6 +1374,29 @@ struct devlink_ops {
int (*port_function_hw_addr_set)(struct devlink *devlink, struct devlink_port *port,
const u8 *hw_addr, int hw_addr_len,
struct netlink_ext_ack *extack);
+ /**
+ * @port_function_state_get: Port function's state get function.
+ *
+ * Should be used by device drivers to report the state of a function
+ * managed by the devlink port. Driver should return -EOPNOTSUPP if it
+ * doesn't support port function handling for a particular port.
+ */
+ int (*port_function_state_get)(struct devlink *devlink,
+ struct devlink_port *port,
+ enum devlink_port_function_state *state,
+ enum devlink_port_function_opstate *opstate,
+ struct netlink_ext_ack *extack);
+ /**
+ * @port_function_state_set: Port function's state set function.
+ *
+ * Should be used by device drivers to set the state of a function
+ * managed by the devlink port. Driver should return -EOPNOTSUPP if it
+ * doesn't support port function handling for a particular port.
+ */
+ int (*port_function_state_set)(struct devlink *devlink,
+ struct devlink_port *port,
+ enum devlink_port_function_state state,
+ struct netlink_ext_ack *extack);
/**
* @port_new: Port add function.
*
@@ -583,9 +583,30 @@ enum devlink_resource_unit {
enum devlink_port_function_attr {
DEVLINK_PORT_FUNCTION_ATTR_UNSPEC,
DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR, /* binary */
+ DEVLINK_PORT_FUNCTION_ATTR_STATE, /* u8 */
+ DEVLINK_PORT_FUNCTION_ATTR_OPSTATE, /* u8 */
__DEVLINK_PORT_FUNCTION_ATTR_MAX,
DEVLINK_PORT_FUNCTION_ATTR_MAX = __DEVLINK_PORT_FUNCTION_ATTR_MAX - 1
};
+enum devlink_port_function_state {
+ DEVLINK_PORT_FUNCTION_STATE_INACTIVE,
+ DEVLINK_PORT_FUNCTION_STATE_ACTIVE,
+};
+
+/**
+ * enum devlink_port_function_opstate - indicates operational state of port function
+ * @DEVLINK_PORT_FUNCTION_OPSTATE_ATTACHED: Driver is attached to the function of port, for
+ * gracefufl tear down of the function, after
+ * inactivation of the port function, user should wait
+ * for operational state to turn DETACHED.
+ * @DEVLINK_PORT_FUNCTION_OPSTATE_DETACHED: Driver is detached from the function of port; it is
+ * safe to delete the port.
+ */
+enum devlink_port_function_opstate {
+ DEVLINK_PORT_FUNCTION_OPSTATE_DETACHED,
+ DEVLINK_PORT_FUNCTION_OPSTATE_ATTACHED,
+};
+
#endif /* _UAPI_LINUX_DEVLINK_H_ */
@@ -87,6 +87,9 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_trap_report);
static const struct nla_policy devlink_function_nl_policy[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1] = {
[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] = { .type = NLA_BINARY },
+ [DEVLINK_PORT_FUNCTION_ATTR_STATE] =
+ NLA_POLICY_RANGE(NLA_U8, DEVLINK_PORT_FUNCTION_STATE_INACTIVE,
+ DEVLINK_PORT_FUNCTION_STATE_ACTIVE),
};
static LIST_HEAD(devlink_list);
@@ -746,6 +749,57 @@ devlink_port_function_hw_addr_fill(struct devlink *devlink, const struct devlink
return 0;
}
+static bool
+devlink_port_function_state_valid(enum devlink_port_function_state state)
+{
+ return state == DEVLINK_PORT_FUNCTION_STATE_INACTIVE ||
+ state == DEVLINK_PORT_FUNCTION_STATE_ACTIVE;
+}
+
+static bool
+devlink_port_function_opstate_valid(enum devlink_port_function_opstate state)
+{
+ return state == DEVLINK_PORT_FUNCTION_OPSTATE_DETACHED ||
+ state == DEVLINK_PORT_FUNCTION_OPSTATE_ATTACHED;
+}
+
+static int
+devlink_port_function_state_fill(struct devlink *devlink,
+ const struct devlink_ops *ops,
+ struct devlink_port *port, struct sk_buff *msg,
+ struct netlink_ext_ack *extack,
+ bool *msg_updated)
+{
+ enum devlink_port_function_opstate opstate;
+ enum devlink_port_function_state state;
+ int err;
+
+ if (!ops->port_function_state_get)
+ return 0;
+
+ err = ops->port_function_state_get(devlink, port, &state, &opstate, extack);
+ if (err) {
+ if (err == -EOPNOTSUPP)
+ return 0;
+ return err;
+ }
+ if (!devlink_port_function_state_valid(state)) {
+ WARN_ON_ONCE(1);
+ NL_SET_ERR_MSG_MOD(extack, "Invalid state value read from driver");
+ return -EINVAL;
+ }
+ if (!devlink_port_function_opstate_valid(opstate)) {
+ WARN_ON_ONCE(1);
+ NL_SET_ERR_MSG_MOD(extack, "Invalid operational state value read from driver");
+ return -EINVAL;
+ }
+ if (nla_put_u8(msg, DEVLINK_PORT_FUNCTION_ATTR_STATE, state) ||
+ nla_put_u8(msg, DEVLINK_PORT_FUNCTION_ATTR_OPSTATE, opstate))
+ return -EMSGSIZE;
+ *msg_updated = true;
+ return 0;
+}
+
static int
devlink_nl_port_function_attrs_put(struct sk_buff *msg, struct devlink_port *port,
struct netlink_ext_ack *extack)
@@ -762,6 +816,13 @@ devlink_nl_port_function_attrs_put(struct sk_buff *msg, struct devlink_port *por
ops = devlink->ops;
err = devlink_port_function_hw_addr_fill(devlink, ops, port, msg, extack, &msg_updated);
+ if (err)
+ goto out;
+ err = devlink_port_function_state_fill(devlink, ops, port, msg, extack,
+ &msg_updated);
+ if (err)
+ goto out;
+out:
if (err || !msg_updated)
nla_nest_cancel(msg, function_attr);
else
@@ -1027,6 +1088,22 @@ devlink_port_function_hw_addr_set(struct devlink *devlink, struct devlink_port *
return ops->port_function_hw_addr_set(devlink, port, hw_addr, hw_addr_len, extack);
}
+static int
+devlink_port_function_state_set(struct devlink *devlink, struct devlink_port *port,
+ const struct nlattr *attr, struct netlink_ext_ack *extack)
+{
+ enum devlink_port_function_state state;
+ const struct devlink_ops *ops;
+
+ state = nla_get_u8(attr);
+ ops = devlink->ops;
+ if (!ops->port_function_state_set) {
+ NL_SET_ERR_MSG_MOD(extack, "Port function does not support state setting");
+ return -EOPNOTSUPP;
+ }
+ return ops->port_function_state_set(devlink, port, state, extack);
+}
+
static int
devlink_port_function_set(struct devlink *devlink, struct devlink_port *port,
const struct nlattr *attr, struct netlink_ext_ack *extack)
@@ -1042,8 +1119,19 @@ devlink_port_function_set(struct devlink *devlink, struct devlink_port *port,
}
attr = tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR];
- if (attr)
+ if (attr) {
err = devlink_port_function_hw_addr_set(devlink, port, attr, extack);
+ if (err)
+ return err;
+ }
+ /* Keep this as the last function attribute set, so that when
+ * multiple port function attributes are set along with state,
+ * Those can be applied first before activating the state.
+ */
+ attr = tb[DEVLINK_PORT_FUNCTION_ATTR_STATE];
+ if (attr)
+ err = devlink_port_function_state_set(devlink, port, attr,
+ extack);
if (!err)
devlink_port_notify(port, DEVLINK_CMD_PORT_NEW);