diff options
Diffstat (limited to 'target/linux/mediatek/patches-4.9/0092-dsa2.patch')
| -rw-r--r-- | target/linux/mediatek/patches-4.9/0092-dsa2.patch | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches-4.9/0092-dsa2.patch b/target/linux/mediatek/patches-4.9/0092-dsa2.patch new file mode 100644 index 0000000000..84e5cb43f7 --- /dev/null +++ b/target/linux/mediatek/patches-4.9/0092-dsa2.patch @@ -0,0 +1,219 @@ +From patchwork Wed Mar 29 09:38:20 2017 +Content-Type: text/plain; charset="utf-8" +MIME-Version: 1.0 +Content-Transfer-Encoding: 7bit +Subject: [net-next,v3,2/5] net-next: dsa: add Mediatek tag RX/TX handler +From: sean.wang@mediatek.com +X-Patchwork-Id: 9651099 +Message-Id: <1490780303-18598-3-git-send-email-sean.wang@mediatek.com> +To: <andrew@lunn.ch>, <f.fainelli@gmail.com>, + <vivien.didelot@savoirfairelinux.com>, <matthias.bgg@gmail.com>, + <robh+dt@kernel.org>, <mark.rutland@arm.com> +Cc: devicetree@vger.kernel.org, Landen.Chao@mediatek.com, keyhaede@gmail.com, + netdev@vger.kernel.org, sean.wang@mediatek.com, + linux-kernel@vger.kernel.org, + linux-mediatek@lists.infradead.org, objelf@gmail.com, davem@davemloft.net +Date: Wed, 29 Mar 2017 17:38:20 +0800 + +From: Sean Wang <sean.wang@mediatek.com> + +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 + +diff --git a/include/net/dsa.h b/include/net/dsa.h +index 4e13e69..3276547 100644 +--- a/include/net/dsa.h ++++ b/include/net/dsa.h +@@ -31,6 +31,7 @@ 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 */ + }; + +diff --git a/net/dsa/Kconfig b/net/dsa/Kconfig +index 9649238..d78789b 100644 +--- a/net/dsa/Kconfig ++++ b/net/dsa/Kconfig +@@ -31,4 +31,6 @@ config NET_DSA_TAG_TRAILER + config NET_DSA_TAG_QCA + bool + ++config NET_DSA_TAG_MTK ++ bool + endif +diff --git a/net/dsa/Makefile b/net/dsa/Makefile +index 31d3437..9b1d478 100644 +--- a/net/dsa/Makefile ++++ b/net/dsa/Makefile +@@ -8,3 +8,4 @@ dsa_core-$(CONFIG_NET_DSA_TAG_DSA) += tag_dsa.o + dsa_core-$(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 +diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c +index b6d4f6a..617f736 100644 +--- a/net/dsa/dsa.c ++++ b/net/dsa/dsa.c +@@ -53,6 +53,9 @@ static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb, + #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, + }; + +diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h +index 0706a51..2a31399 100644 +--- a/net/dsa/dsa_priv.h ++++ b/net/dsa/dsa_priv.h +@@ -85,4 +85,7 @@ int dsa_slave_create(struct dsa_switch *ds, struct device *parent, + /* 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 +diff --git a/net/dsa/tag_mtk.c b/net/dsa/tag_mtk.c +new file mode 100644 +index 0000000..833a9d6 +--- /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, ++}; |