diff options
Diffstat (limited to 'target/linux/generic/backport-5.10/740-v5.13-0004-net-dsa-tag_brcm-add-support-for-legacy-tags.patch')
| -rw-r--r-- | target/linux/generic/backport-5.10/740-v5.13-0004-net-dsa-tag_brcm-add-support-for-legacy-tags.patch | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/target/linux/generic/backport-5.10/740-v5.13-0004-net-dsa-tag_brcm-add-support-for-legacy-tags.patch b/target/linux/generic/backport-5.10/740-v5.13-0004-net-dsa-tag_brcm-add-support-for-legacy-tags.patch deleted file mode 100644 index 3b7d8f37cd..0000000000 --- a/target/linux/generic/backport-5.10/740-v5.13-0004-net-dsa-tag_brcm-add-support-for-legacy-tags.patch +++ /dev/null @@ -1,180 +0,0 @@ -From 964dbf186eaa84d409c359ddf09c827a3fbe8228 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com> -Date: Wed, 17 Mar 2021 11:29:26 +0100 -Subject: [PATCH] net: dsa: tag_brcm: add support for legacy tags -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -Add support for legacy Broadcom tags, which are similar to DSA_TAG_PROTO_BRCM. -These tags are used on BCM5325, BCM5365 and BCM63xx switches. - -Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> -Signed-off-by: David S. Miller <davem@davemloft.net> ---- - include/net/dsa.h | 2 + - net/dsa/Kconfig | 7 +++ - net/dsa/tag_brcm.c | 107 +++++++++++++++++++++++++++++++++++++++++++-- - 3 files changed, 113 insertions(+), 3 deletions(-) - ---- a/include/net/dsa.h -+++ b/include/net/dsa.h -@@ -45,10 +45,12 @@ struct phylink_link_state; - #define DSA_TAG_PROTO_OCELOT_VALUE 15 - #define DSA_TAG_PROTO_AR9331_VALUE 16 - #define DSA_TAG_PROTO_RTL4_A_VALUE 17 -+#define DSA_TAG_PROTO_BRCM_LEGACY_VALUE 22 - - enum dsa_tag_protocol { - DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE, - DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE, -+ DSA_TAG_PROTO_BRCM_LEGACY = DSA_TAG_PROTO_BRCM_LEGACY_VALUE, - DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE, - DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE, - DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE, ---- a/net/dsa/Kconfig -+++ b/net/dsa/Kconfig -@@ -47,6 +47,13 @@ config NET_DSA_TAG_BRCM - Say Y if you want to enable support for tagging frames for the - Broadcom switches which place the tag after the MAC source address. - -+config NET_DSA_TAG_BRCM_LEGACY -+ tristate "Tag driver for Broadcom legacy switches using in-frame headers" -+ select NET_DSA_TAG_BRCM_COMMON -+ help -+ Say Y if you want to enable support for tagging frames for the -+ Broadcom legacy switches which place the tag after the MAC source -+ address. - - config NET_DSA_TAG_BRCM_PREPEND - tristate "Tag driver for Broadcom switches using prepended headers" ---- a/net/dsa/tag_brcm.c -+++ b/net/dsa/tag_brcm.c -@@ -11,9 +11,26 @@ - - #include "dsa_priv.h" - --/* This tag length is 4 bytes, older ones were 6 bytes, we do not -- * handle them -- */ -+/* Legacy Broadcom tag (6 bytes) */ -+#define BRCM_LEG_TAG_LEN 6 -+ -+/* Type fields */ -+/* 1st byte in the tag */ -+#define BRCM_LEG_TYPE_HI 0x88 -+/* 2nd byte in the tag */ -+#define BRCM_LEG_TYPE_LO 0x74 -+ -+/* Tag fields */ -+/* 3rd byte in the tag */ -+#define BRCM_LEG_UNICAST (0 << 5) -+#define BRCM_LEG_MULTICAST (1 << 5) -+#define BRCM_LEG_EGRESS (2 << 5) -+#define BRCM_LEG_INGRESS (3 << 5) -+ -+/* 6th byte in the tag */ -+#define BRCM_LEG_PORT_ID (0xf) -+ -+/* Newer Broadcom tag (4 bytes) */ - #define BRCM_TAG_LEN 4 - - /* Tag is constructed and desconstructed using byte by byte access -@@ -194,6 +211,87 @@ DSA_TAG_DRIVER(brcm_netdev_ops); - MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_BRCM); - #endif - -+#if IS_ENABLED(CONFIG_NET_DSA_TAG_BRCM_LEGACY) -+static struct sk_buff *brcm_leg_tag_xmit(struct sk_buff *skb, -+ struct net_device *dev) -+{ -+ struct dsa_port *dp = dsa_slave_to_port(dev); -+ u8 *brcm_tag; -+ -+ /* The Ethernet switch we are interfaced with needs packets to be at -+ * least 64 bytes (including FCS) otherwise they will be discarded when -+ * they enter the switch port logic. When Broadcom tags are enabled, we -+ * need to make sure that packets are at least 70 bytes -+ * (including FCS and tag) because the length verification is done after -+ * the Broadcom tag is stripped off the ingress packet. -+ * -+ * Let dsa_slave_xmit() free the SKB -+ */ -+ if (__skb_put_padto(skb, ETH_ZLEN + BRCM_LEG_TAG_LEN, false)) -+ return NULL; -+ -+ skb_push(skb, BRCM_LEG_TAG_LEN); -+ -+ memmove(skb->data, skb->data + BRCM_LEG_TAG_LEN, 2 * ETH_ALEN); -+ -+ brcm_tag = skb->data + 2 * ETH_ALEN; -+ -+ /* Broadcom tag type */ -+ brcm_tag[0] = BRCM_LEG_TYPE_HI; -+ brcm_tag[1] = BRCM_LEG_TYPE_LO; -+ -+ /* Broadcom tag value */ -+ brcm_tag[2] = BRCM_LEG_EGRESS; -+ brcm_tag[3] = 0; -+ brcm_tag[4] = 0; -+ brcm_tag[5] = dp->index & BRCM_LEG_PORT_ID; -+ -+ return skb; -+} -+ -+static struct sk_buff *brcm_leg_tag_rcv(struct sk_buff *skb, -+ struct net_device *dev, -+ struct packet_type *pt) -+{ -+ int source_port; -+ u8 *brcm_tag; -+ -+ if (unlikely(!pskb_may_pull(skb, BRCM_LEG_PORT_ID))) -+ return NULL; -+ -+ brcm_tag = skb->data - 2; -+ -+ source_port = brcm_tag[5] & BRCM_LEG_PORT_ID; -+ -+ skb->dev = dsa_master_find_slave(dev, 0, source_port); -+ if (!skb->dev) -+ return NULL; -+ -+ /* Remove Broadcom tag and update checksum */ -+ skb_pull_rcsum(skb, BRCM_LEG_TAG_LEN); -+ -+ skb->offload_fwd_mark = 1; -+ -+ /* Move the Ethernet DA and SA */ -+ memmove(skb->data - ETH_HLEN, -+ skb->data - ETH_HLEN - BRCM_LEG_TAG_LEN, -+ 2 * ETH_ALEN); -+ -+ return skb; -+} -+ -+static const struct dsa_device_ops brcm_legacy_netdev_ops = { -+ .name = "brcm-legacy", -+ .proto = DSA_TAG_PROTO_BRCM_LEGACY, -+ .xmit = brcm_leg_tag_xmit, -+ .rcv = brcm_leg_tag_rcv, -+ .overhead = BRCM_LEG_TAG_LEN, -+}; -+ -+DSA_TAG_DRIVER(brcm_legacy_netdev_ops); -+MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_BRCM_LEGACY); -+#endif /* CONFIG_NET_DSA_TAG_BRCM_LEGACY */ -+ - #if IS_ENABLED(CONFIG_NET_DSA_TAG_BRCM_PREPEND) - static struct sk_buff *brcm_tag_xmit_prepend(struct sk_buff *skb, - struct net_device *dev) -@@ -226,6 +324,9 @@ static struct dsa_tag_driver *dsa_tag_dr - #if IS_ENABLED(CONFIG_NET_DSA_TAG_BRCM) - &DSA_TAG_DRIVER_NAME(brcm_netdev_ops), - #endif -+#if IS_ENABLED(CONFIG_NET_DSA_TAG_BRCM_LEGACY) -+ &DSA_TAG_DRIVER_NAME(brcm_legacy_netdev_ops), -+#endif - #if IS_ENABLED(CONFIG_NET_DSA_TAG_BRCM_PREPEND) - &DSA_TAG_DRIVER_NAME(brcm_prepend_netdev_ops), - #endif |