qtnfmac: advertise netdev port parent ID

Use MAC address of the first active radio as a unique device ID.
Signed-off-by: Igor Mitsyanko <igor.mitsyanko.os@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/quantenna/qtnfmac/bus.h

@@ -67,6 +67,7 @@ struct qtnf_bus {
 	struct mutex bus_lock; /* lock during command/event processing */
 	struct dentry *dbg_dir;
 	struct notifier_block netdev_nb;
+	u8 hw_id[ETH_ALEN];
 	/* bus private data */
 	char bus_priv[0] __aligned(sizeof(void *));
 };

drivers/net/wireless/quantenna/qtnfmac/commands.c

@@ -1242,10 +1242,7 @@ qtnf_cmd_resp_proc_mac_info(struct qtnf_wmac *mac,
 	mac_info = &mac->macinfo;
 
 	mac_info->bands_cap = resp_info->bands_cap;
-	memcpy(&mac_info->dev_mac, &resp_info->dev_mac,
-	       sizeof(mac_info->dev_mac));
-
-	ether_addr_copy(mac->macaddr, mac_info->dev_mac);
+	ether_addr_copy(mac->macaddr, resp_info->dev_mac);
 
 	vif = qtnf_mac_get_base_vif(mac);
 	if (vif)

drivers/net/wireless/quantenna/qtnfmac/core.c

@@ -204,6 +204,21 @@ static int qtnf_netdev_set_mac_address(struct net_device *ndev, void *addr)
 	return ret;
 }
 
+static int qtnf_netdev_port_parent_id(struct net_device *ndev,
+				      struct netdev_phys_item_id *ppid)
+{
+	const struct qtnf_vif *vif = qtnf_netdev_get_priv(ndev);
+	const struct qtnf_bus *bus = vif->mac->bus;
+
+	if (!(bus->hw_info.hw_capab & QLINK_HW_CAPAB_HW_BRIDGE))
+		return -EOPNOTSUPP;
+
+	ppid->id_len = sizeof(bus->hw_id);
+	memcpy(&ppid->id, bus->hw_id, ppid->id_len);
+
+	return 0;
+}
+
 /* Network device ops handlers */
 const struct net_device_ops qtnf_netdev_ops = {
 	.ndo_open = qtnf_netdev_open,
@@ -212,6 +227,7 @@ const struct net_device_ops qtnf_netdev_ops = {
 	.ndo_tx_timeout = qtnf_netdev_tx_timeout,
 	.ndo_get_stats64 = qtnf_netdev_get_stats64,
 	.ndo_set_mac_address = qtnf_netdev_set_mac_address,
+	.ndo_get_port_parent_id = qtnf_netdev_port_parent_id,
 };
 
 static int qtnf_mac_init_single_band(struct wiphy *wiphy,
@@ -565,6 +581,10 @@ static int qtnf_core_mac_attach(struct qtnf_bus *bus, unsigned int macid)
 		goto error;
 	}
 
+	/* Use MAC address of the first active radio as a unique device ID */
+	if (is_zero_ether_addr(mac->bus->hw_id))
+		ether_addr_copy(mac->bus->hw_id, mac->macaddr);
+
 	vif = qtnf_mac_get_base_vif(mac);
 	if (!vif) {
 		pr_err("MAC%u: primary VIF is not ready\n", macid);

drivers/net/wireless/quantenna/qtnfmac/core.h

@@ -74,7 +74,6 @@ struct qtnf_vif {
 
 struct qtnf_mac_info {
 	u8 bands_cap;
-	u8 dev_mac[ETH_ALEN];
 	u8 num_tx_chain;
 	u8 num_rx_chain;
 	u16 max_ap_assoc_sta;