Skip to content

Commit

Permalink
kernel: backport MT7530 MDB operations
Browse files Browse the repository at this point in the history 
Use hardware to forward multicast traffic instead of trapping to the
host.

Signed-off-by: DENG Qingfang <dqfext@gmail.com>
Tested-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Tested-by: Stijn Tintel <stijn@linux-ipv6.be>
  • Loading branch information
@LGA1150 @stintel
LGA1150 authored and stintel committed Feb 5, 2022
1 parent ee6ba21 commit d5f4472
Showing 1 changed file with 171 additions and 0 deletions.
171 changes: 171 additions & 0 deletions target/linux/generic/backport-5.10/770-v5.15-net-dsa-mt7530-support-MDB-operations.patch
View file
@@ -0,0 +1,171 @@
From 1f11a07a33bc26997c18b633d63f088bf75d11f2 Mon Sep 17 00:00:00 2001
From: DENG Qingfang <dqfext@gmail.com>
Date: Tue, 24 Aug 2021 11:37:50 +0800
Subject: [PATCH] net: dsa: mt7530: support MDB operations

This is a partial backport of commit 5a30833b9a16f8d1aa15de06636f9317ca51f9df
("net: dsa: mt7530: support MDB and bridge flag operations") upstream.

Signed-off-by: DENG Qingfang <dqfext@gmail.com>
---
drivers/net/dsa/mt7530.c | 78 ++++++++++++++++++++++++++++++++++++++--
net/dsa/tag_mtk.c | 14 +-------
2 files changed, 76 insertions(+), 16 deletions(-)

--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -1000,9 +1000,6 @@ mt753x_cpu_port_enable(struct dsa_switch
mt7530_write(priv, MT7530_PVC_P(port),
PORT_SPEC_TAG);

- /* Unknown multicast frame forwarding to the cpu port */
- mt7530_rmw(priv, MT7530_MFC, UNM_FFP_MASK, UNM_FFP(BIT(port)));
-
/* Set CPU port number */
if (priv->id == ID_MT7621)
mt7530_rmw(priv, MT7530_MFC, CPU_MASK, CPU_EN | CPU_PORT(port));
@@ -1138,6 +1135,20 @@ mt7530_stp_state_set(struct dsa_switch *
}

static int
+mt7530_port_egress_floods(struct dsa_switch *ds, int port,
+ bool unicast, bool multicast)
+{
+ struct mt7530_priv *priv = ds->priv;
+
+ mt7530_rmw(priv, MT7530_MFC,
+ UNU_FFP(BIT(port)) | UNM_FFP(BIT(port)),
+ (unicast ? UNU_FFP(BIT(port)) : 0) |
+ (multicast ? UNM_FFP(BIT(port)) : 0));
+
+ return 0;
+}
+
+static int
mt7530_port_bridge_join(struct dsa_switch *ds, int port,
struct net_device *bridge)
{
@@ -1357,6 +1368,63 @@ err:
}

static int
+mt7530_port_mdb_prepare(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb)
+{
+ return 0;
+}
+
+static void
+mt7530_port_mdb_add(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb)
+{
+ struct mt7530_priv *priv = ds->priv;
+ const u8 *addr = mdb->addr;
+ u16 vid = mdb->vid;
+ u8 port_mask = 0;
+
+ mutex_lock(&priv->reg_mutex);
+
+ mt7530_fdb_write(priv, vid, 0, addr, 0, STATIC_EMP);
+ if (!mt7530_fdb_cmd(priv, MT7530_FDB_READ, NULL))
+ port_mask = (mt7530_read(priv, MT7530_ATRD) >> PORT_MAP)
+ & PORT_MAP_MASK;
+
+ port_mask |= BIT(port);
+ mt7530_fdb_write(priv, vid, port_mask, addr, -1, STATIC_ENT);
+ mt7530_fdb_cmd(priv, MT7530_FDB_WRITE, NULL);
+
+ mutex_unlock(&priv->reg_mutex);
+}
+
+static int
+mt7530_port_mdb_del(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb)
+{
+ struct mt7530_priv *priv = ds->priv;
+ const u8 *addr = mdb->addr;
+ u16 vid = mdb->vid;
+ u8 port_mask = 0;
+ int ret;
+
+ mutex_lock(&priv->reg_mutex);
+
+ mt7530_fdb_write(priv, vid, 0, addr, 0, STATIC_EMP);
+ if (!mt7530_fdb_cmd(priv, MT7530_FDB_READ, NULL))
+ port_mask = (mt7530_read(priv, MT7530_ATRD) >> PORT_MAP)
+ & PORT_MAP_MASK;
+
+ port_mask &= ~BIT(port);
+ mt7530_fdb_write(priv, vid, port_mask, addr, -1,
+ port_mask ? STATIC_ENT : STATIC_EMP);
+ ret = mt7530_fdb_cmd(priv, MT7530_FDB_WRITE, NULL);
+
+ mutex_unlock(&priv->reg_mutex);
+
+ return ret;
+}
+
+static int
mt7530_vlan_cmd(struct mt7530_priv *priv, enum mt7530_vlan_cmd cmd, u16 vid)
{
struct mt7530_dummy_poll p;
@@ -2794,11 +2862,15 @@ static const struct dsa_switch_ops mt753
.port_change_mtu = mt7530_port_change_mtu,
.port_max_mtu = mt7530_port_max_mtu,
.port_stp_state_set = mt7530_stp_state_set,
+ .port_egress_floods = mt7530_port_egress_floods,
.port_bridge_join = mt7530_port_bridge_join,
.port_bridge_leave = mt7530_port_bridge_leave,
.port_fdb_add = mt7530_port_fdb_add,
.port_fdb_del = mt7530_port_fdb_del,
.port_fdb_dump = mt7530_port_fdb_dump,
+ .port_mdb_prepare = mt7530_port_mdb_prepare,
+ .port_mdb_add = mt7530_port_mdb_add,
+ .port_mdb_del = mt7530_port_mdb_del,
.port_vlan_filtering = mt7530_port_vlan_filtering,
.port_vlan_prepare = mt7530_port_vlan_prepare,
.port_vlan_add = mt7530_port_vlan_add,
--- a/net/dsa/tag_mtk.c
+++ b/net/dsa/tag_mtk.c
@@ -24,9 +24,6 @@ static struct sk_buff *mtk_tag_xmit(stru
struct dsa_port *dp = dsa_slave_to_port(dev);
u8 xmit_tpid;
u8 *mtk_tag;
- unsigned char *dest = eth_hdr(skb)->h_dest;
- bool is_multicast_skb = is_multicast_ether_addr(dest) &&
- !is_broadcast_ether_addr(dest);

/* Build the special tag after the MAC Source Address. If VLAN header
* is present, it's required that VLAN header and special tag is
@@ -55,10 +52,6 @@ static struct sk_buff *mtk_tag_xmit(stru
mtk_tag[0] = xmit_tpid;
mtk_tag[1] = (1 << dp->index) & MTK_HDR_XMIT_DP_BIT_MASK;

- /* Disable SA learning for multicast frames */
- if (unlikely(is_multicast_skb))
- mtk_tag[1] |= MTK_HDR_XMIT_SA_DIS;
-
/* Tag control information is kept for 802.1Q */
if (xmit_tpid == MTK_HDR_XMIT_UNTAGGED) {
mtk_tag[2] = 0;
@@ -74,9 +67,6 @@ static struct sk_buff *mtk_tag_rcv(struc
u16 hdr;
int port;
__be16 *phdr;
- unsigned char *dest = eth_hdr(skb)->h_dest;
- bool is_multicast_skb = is_multicast_ether_addr(dest) &&
- !is_broadcast_ether_addr(dest);

if (unlikely(!pskb_may_pull(skb, MTK_HDR_LEN)))
return NULL;
@@ -102,9 +92,7 @@ static struct sk_buff *mtk_tag_rcv(struc
if (!skb->dev)
return NULL;

- /* Only unicast or broadcast frames are offloaded */
- if (likely(!is_multicast_skb))
- dsa_default_offload_fwd_mark(skb);
+ dsa_default_offload_fwd_mark(skb);

return skb;
}

0 comments on commit d5f4472

Please sign in to comment.