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Subject[PATCH net-next] net: dsa: mt7530: support MDB operations
Date
As the hardware can manage multicast forwarding itself, trapping
multicast traffic to the CPU is no longer required.

Signed-off-by: DENG Qingfang <dqfext@gmail.com>
---
drivers/net/dsa/mt7530.c | 58 +++++++++++++++++++++++++++++++++++++---
net/dsa/tag_mtk.c | 14 +---------
2 files changed, 56 insertions(+), 16 deletions(-)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 28aab0ff6e7d..20e66cf13485 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -1000,9 +1000,6 @@ mt753x_cpu_port_enable(struct dsa_switch *ds, int port)
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));
@@ -1365,6 +1362,59 @@ mt7530_port_fdb_dump(struct dsa_switch *ds, int port,
return 0;
}

+static int
+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;
+ 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, STATIC_ENT);
+ ret = mt7530_fdb_cmd(priv, MT7530_FDB_WRITE, NULL);
+
+ mutex_unlock(&priv->reg_mutex);
+
+ return ret;
+}
+
+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)
{
@@ -3403,6 +3453,8 @@ static const struct dsa_switch_ops mt7530_switch_ops = {
.port_fdb_add = mt7530_port_fdb_add,
.port_fdb_del = mt7530_port_fdb_del,
.port_fdb_dump = mt7530_port_fdb_dump,
+ .port_mdb_add = mt7530_port_mdb_add,
+ .port_mdb_del = mt7530_port_mdb_del,
.port_vlan_filtering = mt7530_port_vlan_filtering,
.port_vlan_add = mt7530_port_vlan_add,
.port_vlan_del = mt7530_port_vlan_del,
diff --git a/net/dsa/tag_mtk.c b/net/dsa/tag_mtk.c
index 38dcdded74c0..53b620e177ad 100644
--- a/net/dsa/tag_mtk.c
+++ b/net/dsa/tag_mtk.c
@@ -23,9 +23,6 @@ static struct sk_buff *mtk_tag_xmit(struct sk_buff *skb,
struct dsa_port *dp = dsa_slave_to_port(dev);
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);

/* Build the special tag after the MAC Source Address. If VLAN header
* is present, it's required that VLAN header and special tag is
@@ -48,10 +45,6 @@ static struct sk_buff *mtk_tag_xmit(struct sk_buff *skb,
MTK_HDR_XMIT_UNTAGGED;
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 (!is_vlan_skb) {
mtk_tag[2] = 0;
@@ -67,9 +60,6 @@ static struct sk_buff *mtk_tag_rcv(struct sk_buff *skb, struct net_device *dev,
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;
@@ -95,9 +85,7 @@ static struct sk_buff *mtk_tag_rcv(struct sk_buff *skb, struct net_device *dev,
if (!skb->dev)
return NULL;

- /* Only unicast or broadcast frames are offloaded */
- if (likely(!is_multicast_skb))
- skb->offload_fwd_mark = 1;
+ skb->offload_fwd_mark = 1;

return skb;
}
--
2.25.1
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