diff options
Diffstat (limited to 'target/linux/mediatek/patches-4.9/0028-net-next-dsa-add-Mediatek-tag-RX-TX-handler.patch')
| -rw-r--r-- | target/linux/mediatek/patches-4.9/0028-net-next-dsa-add-Mediatek-tag-RX-TX-handler.patch | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/target/linux/mediatek/patches-4.9/0028-net-next-dsa-add-Mediatek-tag-RX-TX-handler.patch b/target/linux/mediatek/patches-4.9/0028-net-next-dsa-add-Mediatek-tag-RX-TX-handler.patch deleted file mode 100644 index ef545e3db4..0000000000 --- a/target/linux/mediatek/patches-4.9/0028-net-next-dsa-add-Mediatek-tag-RX-TX-handler.patch +++ /dev/null @@ -1,192 +0,0 @@ -From 5c01c03920c63630864d2b8641924a8c7c6cb62f Mon Sep 17 00:00:00 2001 -From: Sean Wang <sean.wang@mediatek.com> -Date: Wed, 29 Mar 2017 17:38:20 +0800 -Subject: [PATCH 28/57] net-next: dsa: add Mediatek tag RX/TX handler - -Add the support for the 4-bytes tag for DSA port distinguishing inserted -allowing receiving and transmitting the packet via the particular port. -The tag is being added after the source MAC address in the ethernet -header. - -Signed-off-by: Sean Wang <sean.wang@mediatek.com> -Signed-off-by: Landen Chao <Landen.Chao@mediatek.com> -Reviewed-by: Andrew Lunn <andrew@lunn.ch> -Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> ---- - include/net/dsa.h | 1 + - net/dsa/Kconfig | 2 + - net/dsa/Makefile | 1 + - net/dsa/dsa.c | 3 ++ - net/dsa/dsa_priv.h | 3 ++ - net/dsa/tag_mtk.c | 117 +++++++++++++++++++++++++++++++++++++++++++++++++++++ - 6 files changed, 127 insertions(+) - create mode 100644 net/dsa/tag_mtk.c - ---- a/include/net/dsa.h -+++ b/include/net/dsa.h -@@ -27,6 +27,7 @@ enum dsa_tag_protocol { - DSA_TAG_PROTO_EDSA, - DSA_TAG_PROTO_BRCM, - DSA_TAG_PROTO_QCA, -+ DSA_TAG_PROTO_MTK, - DSA_TAG_LAST, /* MUST BE LAST */ - }; - ---- a/net/dsa/Kconfig -+++ b/net/dsa/Kconfig -@@ -42,4 +42,6 @@ config NET_DSA_TAG_TRAILER - config NET_DSA_TAG_QCA - bool - -+config NET_DSA_TAG_MTK -+ bool - endif ---- a/net/dsa/Makefile -+++ b/net/dsa/Makefile -@@ -8,3 +8,4 @@ dsa_core-$(CONFIG_NET_DSA_TAG_DSA) += ta - dsa_core-$(CONFIG_NET_DSA_TAG_EDSA) += tag_edsa.o - dsa_core-$(CONFIG_NET_DSA_TAG_TRAILER) += tag_trailer.o - dsa_core-$(CONFIG_NET_DSA_TAG_QCA) += tag_qca.o -+dsa_core-$(CONFIG_NET_DSA_TAG_MTK) += tag_mtk.o ---- a/net/dsa/dsa.c -+++ b/net/dsa/dsa.c -@@ -57,6 +57,9 @@ const struct dsa_device_ops *dsa_device_ - #ifdef CONFIG_NET_DSA_TAG_QCA - [DSA_TAG_PROTO_QCA] = &qca_netdev_ops, - #endif -+#ifdef CONFIG_NET_DSA_TAG_MTK -+ [DSA_TAG_PROTO_MTK] = &mtk_netdev_ops, -+#endif - [DSA_TAG_PROTO_NONE] = &none_ops, - }; - ---- a/net/dsa/dsa_priv.h -+++ b/net/dsa/dsa_priv.h -@@ -84,4 +84,7 @@ extern const struct dsa_device_ops brcm_ - /* tag_qca.c */ - extern const struct dsa_device_ops qca_netdev_ops; - -+/* tag_mtk.c */ -+extern const struct dsa_device_ops mtk_netdev_ops; -+ - #endif ---- /dev/null -+++ b/net/dsa/tag_mtk.c -@@ -0,0 +1,117 @@ -+/* -+ * Mediatek DSA Tag support -+ * Copyright (C) 2017 Landen Chao <landen.chao@mediatek.com> -+ * Sean Wang <sean.wang@mediatek.com> -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License version 2 and -+ * only version 2 as published by the Free Software Foundation. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ */ -+ -+#include <linux/etherdevice.h> -+#include "dsa_priv.h" -+ -+#define MTK_HDR_LEN 4 -+#define MTK_HDR_RECV_SOURCE_PORT_MASK GENMASK(2, 0) -+#define MTK_HDR_XMIT_DP_BIT_MASK GENMASK(5, 0) -+ -+static struct sk_buff *mtk_tag_xmit(struct sk_buff *skb, -+ struct net_device *dev) -+{ -+ struct dsa_slave_priv *p = netdev_priv(dev); -+ u8 *mtk_tag; -+ -+ if (skb_cow_head(skb, MTK_HDR_LEN) < 0) -+ goto out_free; -+ -+ skb_push(skb, MTK_HDR_LEN); -+ -+ memmove(skb->data, skb->data + MTK_HDR_LEN, 2 * ETH_ALEN); -+ -+ /* Build the tag after the MAC Source Address */ -+ mtk_tag = skb->data + 2 * ETH_ALEN; -+ mtk_tag[0] = 0; -+ mtk_tag[1] = (1 << p->dp->index) & MTK_HDR_XMIT_DP_BIT_MASK; -+ mtk_tag[2] = 0; -+ mtk_tag[3] = 0; -+ -+ return skb; -+ -+out_free: -+ kfree_skb(skb); -+ return NULL; -+} -+ -+static int mtk_tag_rcv(struct sk_buff *skb, struct net_device *dev, -+ struct packet_type *pt, struct net_device *orig_dev) -+{ -+ struct dsa_switch_tree *dst = dev->dsa_ptr; -+ struct dsa_switch *ds; -+ int port; -+ __be16 *phdr, hdr; -+ -+ if (unlikely(!dst)) -+ goto out_drop; -+ -+ skb = skb_unshare(skb, GFP_ATOMIC); -+ if (!skb) -+ goto out; -+ -+ if (unlikely(!pskb_may_pull(skb, MTK_HDR_LEN))) -+ goto out_drop; -+ -+ /* The MTK header is added by the switch between src addr -+ * and ethertype at this point, skb->data points to 2 bytes -+ * after src addr so header should be 2 bytes right before. -+ */ -+ phdr = (__be16 *)(skb->data - 2); -+ hdr = ntohs(*phdr); -+ -+ /* Remove MTK tag and recalculate checksum. */ -+ skb_pull_rcsum(skb, MTK_HDR_LEN); -+ -+ memmove(skb->data - ETH_HLEN, -+ skb->data - ETH_HLEN - MTK_HDR_LEN, -+ 2 * ETH_ALEN); -+ -+ /* This protocol doesn't support cascading multiple -+ * switches so it's safe to assume the switch is first -+ * in the tree. -+ */ -+ ds = dst->ds[0]; -+ if (!ds) -+ goto out_drop; -+ -+ /* Get source port information */ -+ port = (hdr & MTK_HDR_RECV_SOURCE_PORT_MASK); -+ if (!ds->ports[port].netdev) -+ goto out_drop; -+ -+ /* Update skb & forward the frame accordingly */ -+ skb_push(skb, ETH_HLEN); -+ -+ skb->pkt_type = PACKET_HOST; -+ skb->dev = ds->ports[port].netdev; -+ skb->protocol = eth_type_trans(skb, skb->dev); -+ -+ skb->dev->stats.rx_packets++; -+ skb->dev->stats.rx_bytes += skb->len; -+ -+ netif_receive_skb(skb); -+ -+ return 0; -+ -+out_drop: -+ kfree_skb(skb); -+out: -+ return 0; -+} -+ -+const struct dsa_device_ops mtk_netdev_ops = { -+ .xmit = mtk_tag_xmit, -+ .rcv = mtk_tag_rcv, -+}; |