From 4d9423549501812dafe6551d4a78db079ea87648 Mon Sep 17 00:00:00 2001 From: Vladimir Oltean Date: Fri, 12 Feb 2021 17:16:00 +0200 Subject: net: dsa: sja1105: offload bridge port flags to device The chip can configure unicast flooding, broadcast flooding and learning. Learning is per port, while flooding is per {ingress, egress} port pair and we need to configure the same value for all possible ingress ports towards the requested one. While multicast flooding is not officially supported, we can hack it by using a feature of the second generation (P/Q/R/S) devices, which is that FDB entries are maskable, and multicast addresses always have an odd first octet. So by putting a match-all for 00:01:00:00:00:00 addr and 00:01:00:00:00:00 mask at the end of the FDB, we make sure that it is always checked last, and does not take precedence in front of any other MDB. So it behaves effectively as an unknown multicast entry. For the first generation switches, this feature is not available, so unknown multicast will always be treated the same as unknown unicast. So the only thing we can do is request the user to offload the settings for these 2 flags in tandem, i.e. ip link set swp2 type bridge_slave flood off Error: sja1105: This chip cannot configure multicast flooding independently of unicast. ip link set swp2 type bridge_slave flood off mcast_flood off ip link set swp2 type bridge_slave mcast_flood on Error: sja1105: This chip cannot configure multicast flooding independently of unicast. Signed-off-by: Vladimir Oltean Signed-off-by: David S. Miller --- drivers/net/dsa/sja1105/sja1105.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/net/dsa/sja1105/sja1105.h') diff --git a/drivers/net/dsa/sja1105/sja1105.h b/drivers/net/dsa/sja1105/sja1105.h index d582308c2401..15a0893d0ff1 100644 --- a/drivers/net/dsa/sja1105/sja1105.h +++ b/drivers/net/dsa/sja1105/sja1105.h @@ -94,6 +94,7 @@ struct sja1105_info { * pop it when it's equal to TPID2. */ u16 qinq_tpid; + bool can_limit_mcast_flood; int (*reset_cmd)(struct dsa_switch *ds); int (*setup_rgmii_delay)(const void *ctx, int port); /* Prototypes from include/net/dsa.h */ @@ -204,6 +205,7 @@ struct sja1105_private { bool rgmii_rx_delay[SJA1105_NUM_PORTS]; bool rgmii_tx_delay[SJA1105_NUM_PORTS]; bool best_effort_vlan_filtering; + unsigned long learn_ena; const struct sja1105_info *info; struct gpio_desc *reset_gpio; struct spi_device *spidev; -- cgit v1.2.3