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net: dsa: qca8k: add support for mdb_add/del 

Add support for mdb add/del function. The ARL table is used to insert
the rule. The rule will be searched, deleted and reinserted with the
port mask updated. The function will check if the rule has to be updated
or insert directly with no deletion of the old rule.
If every port is removed from the port mask, the rule is removed.
The rule is set STATIC in the ARL table (aka it doesn't age) to not be
flushed by fast age function.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ansuel Smith 2021-11-22 16:23:48 +01:00 committed by David S. Miller
parent 6a3bdc5209
commit ba8f870dfa
1 changed files with 99 additions and 0 deletions
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99
drivers/net/dsa/qca8k.c
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@ -435,6 +435,81 @@ qca8k_fdb_flush(struct qca8k_priv *priv)
mutex_unlock(&priv->reg_mutex);
}
static int
qca8k_fdb_search_and_insert(struct qca8k_priv *priv, u8 port_mask,
const u8 *mac, u16 vid)
{
struct qca8k_fdb fdb = { 0 };
int ret;
mutex_lock(&priv->reg_mutex);
qca8k_fdb_write(priv, vid, 0, mac, 0);
ret = qca8k_fdb_access(priv, QCA8K_FDB_SEARCH, -1);
if (ret < 0)
goto exit;
ret = qca8k_fdb_read(priv, &fdb);
if (ret < 0)
goto exit;
/* Rule exist. Delete first */
if (!fdb.aging) {
ret = qca8k_fdb_access(priv, QCA8K_FDB_PURGE, -1);
if (ret)
goto exit;
}
/* Add port to fdb portmask */
fdb.port_mask |= port_mask;
qca8k_fdb_write(priv, vid, fdb.port_mask, mac, fdb.aging);
ret = qca8k_fdb_access(priv, QCA8K_FDB_LOAD, -1);
exit:
mutex_unlock(&priv->reg_mutex);
return ret;
}
static int
qca8k_fdb_search_and_del(struct qca8k_priv *priv, u8 port_mask,
const u8 *mac, u16 vid)
{
struct qca8k_fdb fdb = { 0 };
int ret;
mutex_lock(&priv->reg_mutex);
qca8k_fdb_write(priv, vid, 0, mac, 0);
ret = qca8k_fdb_access(priv, QCA8K_FDB_SEARCH, -1);
if (ret < 0)
goto exit;
/* Rule doesn't exist. Why delete? */
if (!fdb.aging) {
ret = -EINVAL;
goto exit;
}
ret = qca8k_fdb_access(priv, QCA8K_FDB_PURGE, -1);
if (ret)
goto exit;
/* Only port in the rule is this port. Don't re insert */
if (fdb.port_mask == port_mask)
goto exit;
/* Remove port from port mask */
fdb.port_mask &= ~port_mask;
qca8k_fdb_write(priv, vid, fdb.port_mask, mac, fdb.aging);
ret = qca8k_fdb_access(priv, QCA8K_FDB_LOAD, -1);
exit:
mutex_unlock(&priv->reg_mutex);
return ret;
}
static int
qca8k_vlan_access(struct qca8k_priv *priv, enum qca8k_vlan_cmd cmd, u16 vid)
{
@ -1925,6 +2000,28 @@ qca8k_port_fdb_dump(struct dsa_switch *ds, int port,
return 0;
}
static int
qca8k_port_mdb_add(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_mdb *mdb)
{
struct qca8k_priv *priv = ds->priv;
const u8 *addr = mdb->addr;
u16 vid = mdb->vid;
return qca8k_fdb_search_and_insert(priv, BIT(port), addr, vid);
}
static int
qca8k_port_mdb_del(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_mdb *mdb)
{
struct qca8k_priv *priv = ds->priv;
const u8 *addr = mdb->addr;
u16 vid = mdb->vid;
return qca8k_fdb_search_and_del(priv, BIT(port), addr, vid);
}
static int
qca8k_port_vlan_filtering(struct dsa_switch *ds, int port, bool vlan_filtering,
struct netlink_ext_ack *extack)
@ -2033,6 +2130,8 @@ static const struct dsa_switch_ops qca8k_switch_ops = {
.port_fdb_add = qca8k_port_fdb_add,
.port_fdb_del = qca8k_port_fdb_del,
.port_fdb_dump = qca8k_port_fdb_dump,
.port_mdb_add = qca8k_port_mdb_add,
.port_mdb_del = qca8k_port_mdb_del,
.port_vlan_filtering = qca8k_port_vlan_filtering,
.port_vlan_add = qca8k_port_vlan_add,
.port_vlan_del = qca8k_port_vlan_del,