diff options
Diffstat (limited to 'drivers/net/dsa/lantiq_gswip.c')
| -rw-r--r-- | drivers/net/dsa/lantiq_gswip.c | 62 |
1 files changed, 55 insertions, 7 deletions
diff --git a/drivers/net/dsa/lantiq_gswip.c b/drivers/net/dsa/lantiq_gswip.c index 8a7a8093a156..a416240d001b 100644 --- a/drivers/net/dsa/lantiq_gswip.c +++ b/drivers/net/dsa/lantiq_gswip.c @@ -213,6 +213,7 @@ #define GSWIP_MAC_CTRL_0_GMII_MII 0x0001 #define GSWIP_MAC_CTRL_0_GMII_RGMII 0x0002 #define GSWIP_MAC_CTRL_2p(p) (0x905 + ((p) * 0xC)) +#define GSWIP_MAC_CTRL_2_LCHKL BIT(2) /* Frame Length Check Long Enable */ #define GSWIP_MAC_CTRL_2_MLEN BIT(3) /* Maximum Untagged Frame Lnegth */ /* Ethernet Switch Fetch DMA Port Control Register */ @@ -239,6 +240,15 @@ #define XRX200_GPHY_FW_ALIGN (16 * 1024) +/* Maximum packet size supported by the switch. In theory this should be 10240, + * but long packets currently cause lock-ups with an MTU of over 2526. Medium + * packets are sometimes dropped (e.g. TCP over 2477, UDP over 2516-2519, ICMP + * over 2526), hence an MTU value of 2400 seems safe. This issue only affects + * packet reception. This is probably caused by the PPA engine, which is on the + * RX part of the device. Packet transmission works properly up to 10240. + */ +#define GSWIP_MAX_PACKET_LENGTH 2400 + struct gswip_hw_info { int max_ports; int cpu_port; @@ -863,10 +873,6 @@ static int gswip_setup(struct dsa_switch *ds) gswip_switch_mask(priv, 0, GSWIP_PCE_PCTRL_0_INGRESS, GSWIP_PCE_PCTRL_0p(cpu_port)); - gswip_switch_mask(priv, 0, GSWIP_MAC_CTRL_2_MLEN, - GSWIP_MAC_CTRL_2p(cpu_port)); - gswip_switch_w(priv, VLAN_ETH_FRAME_LEN + 8 + ETH_FCS_LEN, - GSWIP_MAC_FLEN); gswip_switch_mask(priv, 0, GSWIP_BM_QUEUE_GCTRL_GL_MOD, GSWIP_BM_QUEUE_GCTRL); @@ -883,6 +889,8 @@ static int gswip_setup(struct dsa_switch *ds) return err; } + ds->mtu_enforcement_ingress = true; + gswip_port_enable(ds, cpu_port, NULL); ds->configure_vlan_while_not_filtering = false; @@ -1152,7 +1160,8 @@ static int gswip_vlan_remove(struct gswip_priv *priv, static int gswip_port_bridge_join(struct dsa_switch *ds, int port, struct dsa_bridge bridge, - bool *tx_fwd_offload) + bool *tx_fwd_offload, + struct netlink_ext_ack *extack) { struct net_device *br = bridge.dev; struct gswip_priv *priv = ds->priv; @@ -1389,13 +1398,15 @@ static int gswip_port_fdb(struct dsa_switch *ds, int port, } static int gswip_port_fdb_add(struct dsa_switch *ds, int port, - const unsigned char *addr, u16 vid) + const unsigned char *addr, u16 vid, + struct dsa_db db) { return gswip_port_fdb(ds, port, addr, vid, true); } static int gswip_port_fdb_del(struct dsa_switch *ds, int port, - const unsigned char *addr, u16 vid) + const unsigned char *addr, u16 vid, + struct dsa_db db) { return gswip_port_fdb(ds, port, addr, vid, false); } @@ -1446,6 +1457,39 @@ static int gswip_port_fdb_dump(struct dsa_switch *ds, int port, return 0; } +static int gswip_port_max_mtu(struct dsa_switch *ds, int port) +{ + /* Includes 8 bytes for special header. */ + return GSWIP_MAX_PACKET_LENGTH - VLAN_ETH_HLEN - ETH_FCS_LEN; +} + +static int gswip_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu) +{ + struct gswip_priv *priv = ds->priv; + int cpu_port = priv->hw_info->cpu_port; + + /* CPU port always has maximum mtu of user ports, so use it to set + * switch frame size, including 8 byte special header. + */ + if (port == cpu_port) { + new_mtu += 8; + gswip_switch_w(priv, VLAN_ETH_HLEN + new_mtu + ETH_FCS_LEN, + GSWIP_MAC_FLEN); + } + + /* Enable MLEN for ports with non-standard MTUs, including the special + * header on the CPU port added above. + */ + if (new_mtu != ETH_DATA_LEN) + gswip_switch_mask(priv, 0, GSWIP_MAC_CTRL_2_MLEN, + GSWIP_MAC_CTRL_2p(port)); + else + gswip_switch_mask(priv, GSWIP_MAC_CTRL_2_MLEN, 0, + GSWIP_MAC_CTRL_2p(port)); + + return 0; +} + static void gswip_xrx200_phylink_get_caps(struct dsa_switch *ds, int port, struct phylink_config *config) { @@ -1791,6 +1835,8 @@ static const struct dsa_switch_ops gswip_xrx200_switch_ops = { .port_fdb_add = gswip_port_fdb_add, .port_fdb_del = gswip_port_fdb_del, .port_fdb_dump = gswip_port_fdb_dump, + .port_change_mtu = gswip_port_change_mtu, + .port_max_mtu = gswip_port_max_mtu, .phylink_get_caps = gswip_xrx200_phylink_get_caps, .phylink_mac_config = gswip_phylink_mac_config, .phylink_mac_link_down = gswip_phylink_mac_link_down, @@ -1815,6 +1861,8 @@ static const struct dsa_switch_ops gswip_xrx300_switch_ops = { .port_fdb_add = gswip_port_fdb_add, .port_fdb_del = gswip_port_fdb_del, .port_fdb_dump = gswip_port_fdb_dump, + .port_change_mtu = gswip_port_change_mtu, + .port_max_mtu = gswip_port_max_mtu, .phylink_get_caps = gswip_xrx300_phylink_get_caps, .phylink_mac_config = gswip_phylink_mac_config, .phylink_mac_link_down = gswip_phylink_mac_link_down, |