diff options
Diffstat (limited to 'target/linux/lantiq/patches-5.10/0706-v5.18-net-lantiq-enable-jumbo-frames-on-GSWIP.patch')
| -rw-r--r-- | target/linux/lantiq/patches-5.10/0706-v5.18-net-lantiq-enable-jumbo-frames-on-GSWIP.patch | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/target/linux/lantiq/patches-5.10/0706-v5.18-net-lantiq-enable-jumbo-frames-on-GSWIP.patch b/target/linux/lantiq/patches-5.10/0706-v5.18-net-lantiq-enable-jumbo-frames-on-GSWIP.patch deleted file mode 100644 index 49a19bebee..0000000000 --- a/target/linux/lantiq/patches-5.10/0706-v5.18-net-lantiq-enable-jumbo-frames-on-GSWIP.patch +++ /dev/null @@ -1,127 +0,0 @@ -From c40bb4fedcd6b8b6a714da5dd466eb88ed2652d1 Mon Sep 17 00:00:00 2001 -From: Aleksander Jan Bajkowski <olek2@wp.pl> -Date: Wed, 9 Mar 2022 00:04:57 +0100 -Subject: net: dsa: lantiq_gswip: enable jumbo frames on GSWIP - -This enables non-standard MTUs on a per-port basis, with the overall -frame size set based on the CPU port. - -When the MTU is not changed, this should have no effect. - -Long packets crash the switch with MTUs of greater than 2526, so the -maximum is limited for now. 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. - -Signed-off-by: Thomas Nixon <tom@tomn.co.uk> -Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl> -Link: https://lore.kernel.org/r/20220308230457.1599237-1-olek2@wp.pl -Signed-off-by: Jakub Kicinski <kuba@kernel.org> ---- - drivers/net/dsa/lantiq_gswip.c | 53 ++++++++++++++++++++++++++++++++++++++---- - 1 file changed, 49 insertions(+), 4 deletions(-) - ---- 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; -@@ -858,10 +868,6 @@ static int gswip_setup(struct dsa_switch - 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); - -@@ -878,6 +884,8 @@ static int gswip_setup(struct dsa_switch - return err; - } - -+ ds->mtu_enforcement_ingress = true; -+ - gswip_port_enable(ds, cpu_port, NULL); - return 0; - } -@@ -1472,6 +1480,39 @@ static void gswip_phylink_set_capab(unsi - __ETHTOOL_LINK_MODE_MASK_NBITS); - } - -+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_validate(struct dsa_switch *ds, int port, - unsigned long *supported, - struct phylink_link_state *state) -@@ -1829,6 +1870,8 @@ static const struct dsa_switch_ops gswip - .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_validate = gswip_xrx200_phylink_validate, - .phylink_mac_config = gswip_phylink_mac_config, - .phylink_mac_link_down = gswip_phylink_mac_link_down, -@@ -1853,6 +1896,8 @@ static const struct dsa_switch_ops gswip - .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_validate = gswip_xrx300_phylink_validate, - .phylink_mac_config = gswip_phylink_mac_config, - .phylink_mac_link_down = gswip_phylink_mac_link_down, |