realtek: reduce excessive logging for FDB operations

Currently several messages at KERN_INFO level are printed for every FDB
del/dump operation. This can cause a significant slowdown for example
while using "bridge fdb", and may even trigger a watchdog.

Remove most of these log messages, as the new L2 table debugfs node
should be a good replacement. Change the remaining messages to
KERN_DEBUG level.

Signed-off-by: Jan Hoffmann <jan@3e8.eu>

target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/dsa.c

@@ -1535,28 +1535,6 @@ static int rtl83xx_vlan_del(struct dsa_switch *ds, int port,
 	return 0;
 }
 
-static void dump_l2_entry(struct rtl838x_l2_entry *e)
-{
-	pr_info("MAC: %02x:%02x:%02x:%02x:%02x:%02x vid: %d, rvid: %d, port: %d, valid: %d\n",
-		e->mac[0], e->mac[1], e->mac[2], e->mac[3], e->mac[4], e->mac[5],
-		e->vid, e->rvid, e->port, e->valid);
-
-	if (e->type != L2_MULTICAST) {
-		pr_info("Type: %d, is_static: %d, is_ip_mc: %d, is_ipv6_mc: %d, block_da: %d\n",
-			e->type, e->is_static, e->is_ip_mc, e->is_ipv6_mc, e->block_da);
-		pr_info("  block_sa: %d, susp: %d, nh: %d, age: %d, is_trunk: %d, trunk: %d\n",
-		e->block_sa, e->suspended, e->next_hop, e->age, e->is_trunk, e->trunk);
-	}
-	if (e->type == L2_MULTICAST)
-		pr_info("  L2_MULTICAST mc_portmask_index: %d\n", e->mc_portmask_index);
-	if (e->is_ip_mc || e->is_ipv6_mc)
-		pr_info("  mc_portmask_index: %d, mc_gip: %d, mc_sip: %d\n",
-			e->mc_portmask_index, e->mc_gip, e->mc_sip);
-	pr_info("  stack_dev: %d\n", e->stack_dev);
-	if (e->next_hop)
-		pr_info("  nh_route_id: %d\n", e->nh_route_id);
-}
-
 static void rtl83xx_setup_l2_uc_entry(struct rtl838x_l2_entry *e, int port, int vid, u64 mac)
 {
 	e->is_ip_mc = e->is_ipv6_mc  = false;
@@ -1685,15 +1663,14 @@ static int rtl83xx_port_fdb_del(struct dsa_switch *ds, int port,
 	int err = 0, idx;
 	u64 seed = priv->r->l2_hash_seed(mac, vid);
 
-	pr_info("In %s, mac %llx, vid: %d\n", __func__, mac, vid);
+	pr_debug("In %s, mac %llx, vid: %d\n", __func__, mac, vid);
 	mutex_lock(&priv->reg_mutex);
 
 	idx = rtl83xx_find_l2_hash_entry(priv, seed, true, &e);
 
 	if (idx >= 0) {
-		pr_info("Found entry index %d, key %d and bucket %d\n", idx, idx >> 2, idx & 3);
+		pr_debug("Found entry index %d, key %d and bucket %d\n", idx, idx >> 2, idx & 3);
 		e.valid = false;
-		dump_l2_entry(&e);
 		priv->r->write_l2_entry_using_hash(idx >> 2, idx & 0x3, &e);
 		goto out;
 	}
@@ -1718,8 +1695,6 @@ static int rtl83xx_port_fdb_dump(struct dsa_switch *ds, int port,
 	struct rtl838x_l2_entry e;
 	struct rtl838x_switch_priv *priv = ds->priv;
 	int i;
-	u32 fid, pkey;
-	u64 mac;
 
 	mutex_lock(&priv->reg_mutex);
 
@@ -1729,30 +1704,8 @@ static int rtl83xx_port_fdb_dump(struct dsa_switch *ds, int port,
 		if (!e.valid)
 			continue;
 
-		if (e.port == port || e.port == RTL930X_PORT_IGNORE) {
+		if (e.port == port || e.port == RTL930X_PORT_IGNORE)
-			u64 seed;
-			u32 key;
-
-			fid = ((i >> 2) & 0x3ff) | (e.rvid & ~0x3ff);
-			mac = ether_addr_to_u64(&e.mac[0]);
-			pkey = priv->r->l2_hash_key(priv, priv->r->l2_hash_seed(mac, fid));
-			fid = (pkey & 0x3ff) | (fid & ~0x3ff);
-			pr_info("-> index %d, key %x, bucket %d, dmac %016llx, fid: %x rvid: %x\n",
-				i, i >> 2, i & 0x3, mac, fid, e.rvid);
-			dump_l2_entry(&e);
-			seed = priv->r->l2_hash_seed(mac, e.rvid);
-			key = priv->r->l2_hash_key(priv, seed);
-			pr_info("seed: %016llx, key based on rvid: %08x\n", seed, key);
 			cb(e.mac, e.vid, e.is_static, data);
-		}
-		if (e.type == L2_MULTICAST) {
-			u64 portmask = priv->r->read_mcast_pmask(e.mc_portmask_index);
-
-			if (portmask & BIT_ULL(port)) {
-				dump_l2_entry(&e);
-				pr_info("  PM: %016llx\n", portmask);
-			}
-		}
 	}
 
 	for (i = 0; i < 64; i++) {
@@ -1876,7 +1829,6 @@ int rtl83xx_port_mdb_del(struct dsa_switch *ds, int port,
 		portmask = rtl83xx_mc_group_del_port(priv, e.mc_portmask_index, port);
 		if (!portmask) {
 			e.valid = false;
-			// dump_l2_entry(&e);
 			priv->r->write_l2_entry_using_hash(idx >> 2, idx & 0x3, &e);
 		}
 		goto out;
@@ -1889,7 +1841,6 @@ int rtl83xx_port_mdb_del(struct dsa_switch *ds, int port,
 		portmask = rtl83xx_mc_group_del_port(priv, e.mc_portmask_index, port);
 		if (!portmask) {
 			e.valid = false;
-			// dump_l2_entry(&e);
 			priv->r->write_cam(idx, &e);
 		}
 		goto out;

target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl930x.c

@@ -579,22 +579,6 @@ static void rtl930x_write_cam(int idx, struct rtl838x_l2_entry *e)
 	rtl_table_release(q);
 }
 
-static void dump_l2_entry(struct rtl838x_l2_entry *e)
-{
-	pr_info("MAC: %02x:%02x:%02x:%02x:%02x:%02x vid: %d, rvid: %d, port: %d, valid: %d\n",
-		e->mac[0], e->mac[1], e->mac[2], e->mac[3], e->mac[4], e->mac[5],
-		e->vid, e->rvid, e->port, e->valid);
-	pr_info("Type: %d, is_static: %d, is_ip_mc: %d, is_ipv6_mc: %d, block_da: %d\n",
-		e->type, e->is_static, e->is_ip_mc, e->is_ipv6_mc, e->block_da);
-	pr_info("  block_sa: %d, suspended: %d, next_hop: %d, age: %d, is_trunk: %d, trunk: %d\n",
-		e->block_sa, e->suspended, e->next_hop, e->age, e->is_trunk, e->trunk);
-	if (e->is_ip_mc || e->is_ipv6_mc)
-		pr_info("  mc_portmask_index: %d, mc_gip: %d, mc_sip: %d\n",
-			e->mc_portmask_index, e->mc_gip, e->mc_sip);
-	pr_info("  stac_dev: %d, nh_route_id: %d, port: %d, dev_id\n",
-		e->stack_dev, e->nh_route_id, e->port);
-}
-
 static u64 rtl930x_read_mcast_pmask(int idx)
 {
 	u32 portmask;