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net: dsa: mv88e6xxx: check hardware VLAN in use
The DSA drivers now have access to the VLAN prepare phase and the bridge net_device. It is easier to check for overlapping bridges from within the driver. Thus add such check in mv88e6xxx_port_vlan_prepare. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1471,14 +1471,78 @@ static int _mv88e6xxx_vlan_init(struct dsa_switch *ds, u16 vid,
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return 0;
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}
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static int mv88e6xxx_port_check_hw_vlan(struct dsa_switch *ds, int port,
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u16 vid_begin, u16 vid_end)
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{
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struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
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struct mv88e6xxx_vtu_stu_entry vlan;
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int i, err;
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if (!vid_begin)
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return -EOPNOTSUPP;
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mutex_lock(&ps->smi_mutex);
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err = _mv88e6xxx_vtu_vid_write(ds, vid_begin - 1);
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if (err)
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goto unlock;
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do {
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err = _mv88e6xxx_vtu_getnext(ds, &vlan);
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if (err)
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goto unlock;
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if (!vlan.valid)
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break;
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if (vlan.vid > vid_end)
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break;
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for (i = 0; i < ps->num_ports; ++i) {
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if (dsa_is_dsa_port(ds, i) || dsa_is_cpu_port(ds, i))
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continue;
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if (vlan.data[i] ==
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GLOBAL_VTU_DATA_MEMBER_TAG_NON_MEMBER)
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continue;
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if (ps->ports[i].bridge_dev ==
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ps->ports[port].bridge_dev)
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break; /* same bridge, check next VLAN */
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netdev_warn(ds->ports[port],
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"hardware VLAN %d already used by %s\n",
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vlan.vid,
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netdev_name(ps->ports[i].bridge_dev));
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err = -EOPNOTSUPP;
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goto unlock;
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}
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} while (vlan.vid < vid_end);
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unlock:
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mutex_unlock(&ps->smi_mutex);
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return err;
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}
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int mv88e6xxx_port_vlan_prepare(struct dsa_switch *ds, int port,
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const struct switchdev_obj_port_vlan *vlan,
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struct switchdev_trans *trans)
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{
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int err;
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/* We reserve a few VLANs to isolate unbridged ports */
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if (vlan->vid_end >= 4000)
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return -EOPNOTSUPP;
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/* If the requested port doesn't belong to the same bridge as the VLAN
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* members, do not support it (yet) and fallback to software VLAN.
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*/
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err = mv88e6xxx_port_check_hw_vlan(ds, port, vlan->vid_begin,
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vlan->vid_end);
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if (err)
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return err;
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/* We don't need any dynamic resource from the kernel (yet),
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* so skip the prepare phase.
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*/
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