ice: receive LLDP on trusted VFs

When a trusted VF tries to configure an LLDP multicast address, configure a
rule that would mirror the traffic to this VF, untrusted VFs are not
allowed to receive LLDP at all, so the request to add LLDP MAC address will
always fail for them.

Add a forwarding LLDP filter to a trusted VF when it tries to add an LLDP
multicast MAC address. The MAC address has to be added after enabling
trust (through restarting the LLDP service).

Signed-off-by: Mateusz Pacuszka <[email protected]>
Co-developed-by: Larysa Zaremba <[email protected]>
Signed-off-by: Larysa Zaremba <[email protected]>
Reviewed-by: Michal Swiatkowski <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Tested-by: Rafal Romanowski <[email protected]>
Signed-off-by: Tony Nguyen <[email protected]>

1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_vf_lib.c b/drivers/net/ethernet/intel/ice/ice_vf_lib.c
index 815ad0bfe832..48cd533e93b7 100644
--- a/drivers/net/ethernet/intel/ice/ice_vf_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_vf_lib.c
@@ -226,6 +226,7 @@ static void ice_vf_clear_counters(struct ice_vf *vf)
 		vsi->num_vlan = 0;
 
 	vf->num_mac = 0;
+	vf->num_mac_lldp = 0;
 	memset(&vf->mdd_tx_events, 0, sizeof(vf->mdd_tx_events));
 	memset(&vf->mdd_rx_events, 0, sizeof(vf->mdd_rx_events));
 }
@@ -1401,3 +1402,28 @@ struct ice_vsi *ice_get_vf_ctrl_vsi(struct ice_pf *pf, struct ice_vsi *vsi)
 	rcu_read_unlock();
 	return ctrl_vsi;
 }
+
+/**
+ * ice_vf_update_mac_lldp_num - update the VF's number of LLDP addresses
+ * @vf: a VF to add the address to
+ * @vsi: the corresponding VSI
+ * @incr: is the rule added or removed
+ */
+void ice_vf_update_mac_lldp_num(struct ice_vf *vf, struct ice_vsi *vsi,
+				bool incr)
+{
+	bool lldp_by_fw = test_bit(ICE_FLAG_FW_LLDP_AGENT, vsi->back->flags);
+	bool was_ena = ice_vf_is_lldp_ena(vf) && !lldp_by_fw;
+	bool is_ena;
+
+	if (WARN_ON(!vsi)) {
+		vf->num_mac_lldp = 0;
+		return;
+	}
+
+	vf->num_mac_lldp += incr ? 1 : -1;
+	is_ena = ice_vf_is_lldp_ena(vf) && !lldp_by_fw;
+
+	if (was_ena != is_ena)
+		ice_vsi_cfg_sw_lldp(vsi, false, is_ena);
+}