From: DENG Qingfang <dqfext@gmail.com>
To: Sean Wang <sean.wang@mediatek.com>,
Landen Chao <Landen.Chao@mediatek.com>,
Andrew Lunn <andrew@lunn.ch>,
Vivien Didelot <vivien.didelot@gmail.com>,
Florian Fainelli <f.fainelli@gmail.com>,
Vladimir Oltean <olteanv@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
netdev@vger.kernel.org, linux-mediatek@lists.infradead.org,
linux-kernel@vger.kernel.org
Cc: Ilario Gelmetti <iochesonome@gmail.com>
Subject: [PATCH net] net: dsa: tag_mtk: fix 802.1ad VLAN egress
Date: Tue, 2 Mar 2021 00:01:59 +0800 [thread overview]
Message-ID: <20210301160159.7622-1-dqfext@gmail.com> (raw)
A different TPID bit is used for 802.1ad VLAN frames.
Reported-by: Ilario Gelmetti <iochesonome@gmail.com>
Fixes: f0af34317f4b ("net: dsa: mediatek: combine MediaTek tag with VLAN tag")
Signed-off-by: DENG Qingfang <dqfext@gmail.com>
---
net/dsa/tag_mtk.c | 19 +++++++++++++------
1 file changed, 13 insertions(+), 6 deletions(-)
diff --git a/net/dsa/tag_mtk.c b/net/dsa/tag_mtk.c
index 38dcdded74c0..59748487664f 100644
--- a/net/dsa/tag_mtk.c
+++ b/net/dsa/tag_mtk.c
@@ -13,6 +13,7 @@
#define MTK_HDR_LEN 4
#define MTK_HDR_XMIT_UNTAGGED 0
#define MTK_HDR_XMIT_TAGGED_TPID_8100 1
+#define MTK_HDR_XMIT_TAGGED_TPID_88A8 2
#define MTK_HDR_RECV_SOURCE_PORT_MASK GENMASK(2, 0)
#define MTK_HDR_XMIT_DP_BIT_MASK GENMASK(5, 0)
#define MTK_HDR_XMIT_SA_DIS BIT(6)
@@ -21,8 +22,8 @@ static struct sk_buff *mtk_tag_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
+ u8 xmit_tpid;
u8 *mtk_tag;
- bool is_vlan_skb = true;
unsigned char *dest = eth_hdr(skb)->h_dest;
bool is_multicast_skb = is_multicast_ether_addr(dest) &&
!is_broadcast_ether_addr(dest);
@@ -33,10 +34,17 @@ static struct sk_buff *mtk_tag_xmit(struct sk_buff *skb,
* the both special and VLAN tag at the same time and then look up VLAN
* table with VID.
*/
- if (!skb_vlan_tagged(skb)) {
+ switch (skb->protocol) {
+ case htons(ETH_P_8021Q):
+ xmit_tpid = MTK_HDR_XMIT_TAGGED_TPID_8100;
+ break;
+ case htons(ETH_P_8021AD):
+ xmit_tpid = MTK_HDR_XMIT_TAGGED_TPID_88A8;
+ break;
+ default:
+ xmit_tpid = MTK_HDR_XMIT_UNTAGGED;
skb_push(skb, MTK_HDR_LEN);
memmove(skb->data, skb->data + MTK_HDR_LEN, 2 * ETH_ALEN);
- is_vlan_skb = false;
}
mtk_tag = skb->data + 2 * ETH_ALEN;
@@ -44,8 +52,7 @@ static struct sk_buff *mtk_tag_xmit(struct sk_buff *skb,
/* Mark tag attribute on special tag insertion to notify hardware
* whether that's a combined special tag with 802.1Q header.
*/
- mtk_tag[0] = is_vlan_skb ? MTK_HDR_XMIT_TAGGED_TPID_8100 :
- MTK_HDR_XMIT_UNTAGGED;
+ mtk_tag[0] = xmit_tpid;
mtk_tag[1] = (1 << dp->index) & MTK_HDR_XMIT_DP_BIT_MASK;
/* Disable SA learning for multicast frames */
@@ -53,7 +60,7 @@ static struct sk_buff *mtk_tag_xmit(struct sk_buff *skb,
mtk_tag[1] |= MTK_HDR_XMIT_SA_DIS;
/* Tag control information is kept for 802.1Q */
- if (!is_vlan_skb) {
+ if (xmit_tpid == MTK_HDR_XMIT_UNTAGGED) {
mtk_tag[2] = 0;
mtk_tag[3] = 0;
}
--
2.25.1
next reply other threads:[~2021-03-01 16:03 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-01 16:01 DENG Qingfang [this message]
2021-03-01 23:54 ` [PATCH net] net: dsa: tag_mtk: fix 802.1ad VLAN egress patchwork-bot+netdevbpf
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