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net: sparx5: Add mdb handlers

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Adds mdb handlers. Uses the PGID arbiter to
find a free entry in the PGID table for the
multicast group port mask.

Signed-off-by: Casper Andersson <casper.casan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Casper Andersson 2022-03-21 11:14:46 +01:00 committed by David S. Miller
parent af9b45d08e
commit 3bacfccdcb
3 changed files with 136 additions and 10 deletions
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33
drivers/net/ethernet/microchip/sparx5/sparx5_mactable.c
View file

@ -186,11 +186,11 @@ bool sparx5_mact_getnext(struct sparx5 *sparx5,
return ret == 0;
}
static int sparx5_mact_lookup(struct sparx5 *sparx5,
const unsigned char mac[ETH_ALEN],
u16 vid)
bool sparx5_mact_find(struct sparx5 *sparx5,
const unsigned char mac[ETH_ALEN], u16 vid, u32 *pcfg2)
{
int ret;
u32 cfg2;
mutex_lock(&sparx5->lock);
@ -202,16 +202,29 @@ static int sparx5_mact_lookup(struct sparx5 *sparx5,
sparx5, LRN_COMMON_ACCESS_CTRL);
ret = sparx5_mact_wait_for_completion(sparx5);
if (ret)
goto out;
if (ret == 0) {
cfg2 = spx5_rd(sparx5, LRN_MAC_ACCESS_CFG_2);
if (LRN_MAC_ACCESS_CFG_2_MAC_ENTRY_VLD_GET(cfg2))
*pcfg2 = cfg2;
else
ret = -ENOENT;
}
ret = LRN_MAC_ACCESS_CFG_2_MAC_ENTRY_VLD_GET
(spx5_rd(sparx5, LRN_MAC_ACCESS_CFG_2));
out:
mutex_unlock(&sparx5->lock);
return ret;
return ret == 0;
}
static int sparx5_mact_lookup(struct sparx5 *sparx5,
const unsigned char mac[ETH_ALEN],
u16 vid)
{
u32 pcfg2;
if (sparx5_mact_find(sparx5, mac, vid, &pcfg2))
return 1;
return 0;
}
int sparx5_mact_forget(struct sparx5 *sparx5,

2
drivers/net/ethernet/microchip/sparx5/sparx5_main.h
View file

@ -310,6 +310,8 @@ int sparx5_mact_learn(struct sparx5 *sparx5, int port,
const unsigned char mac[ETH_ALEN], u16 vid);
bool sparx5_mact_getnext(struct sparx5 *sparx5,
unsigned char mac[ETH_ALEN], u16 *vid, u32 *pcfg2);
bool sparx5_mact_find(struct sparx5 *sparx5,
const unsigned char mac[ETH_ALEN], u16 vid, u32 *pcfg2);
int sparx5_mact_forget(struct sparx5 *sparx5,
const unsigned char mac[ETH_ALEN], u16 vid);
int sparx5_add_mact_entry(struct sparx5 *sparx5,

111
drivers/net/ethernet/microchip/sparx5/sparx5_switchdev.c
View file

@ -386,6 +386,109 @@ static int sparx5_handle_port_vlan_add(struct net_device *dev,
v->flags & BRIDGE_VLAN_INFO_UNTAGGED);
}
static int sparx5_handle_port_mdb_add(struct net_device *dev,
struct notifier_block *nb,
const struct switchdev_obj_port_mdb *v)
{
struct sparx5_port *port = netdev_priv(dev);
struct sparx5 *spx5 = port->sparx5;
u16 pgid_idx, vid;
u32 mact_entry;
int res, err;
/* When VLAN unaware the vlan value is not parsed and we receive vid 0.
* Fall back to bridge vid 1.
*/
if (!br_vlan_enabled(spx5->hw_bridge_dev))
vid = 1;
else
vid = v->vid;
res = sparx5_mact_find(spx5, v->addr, vid, &mact_entry);
if (res) {
pgid_idx = LRN_MAC_ACCESS_CFG_2_MAC_ENTRY_ADDR_GET(mact_entry);
/* MC_IDX has an offset of 65 in the PGID table. */
pgid_idx += PGID_MCAST_START;
sparx5_pgid_update_mask(port, pgid_idx, true);
} else {
err = sparx5_pgid_alloc_mcast(spx5, &pgid_idx);
if (err) {
netdev_warn(dev, "multicast pgid table full\n");
return err;
}
sparx5_pgid_update_mask(port, pgid_idx, true);
err = sparx5_mact_learn(spx5, pgid_idx, v->addr, vid);
if (err) {
netdev_warn(dev, "could not learn mac address %pM\n", v->addr);
sparx5_pgid_update_mask(port, pgid_idx, false);
return err;
}
}
return 0;
}
static int sparx5_mdb_del_entry(struct net_device *dev,
struct sparx5 *spx5,
const unsigned char mac[ETH_ALEN],
const u16 vid,
u16 pgid_idx)
{
int err;
err = sparx5_mact_forget(spx5, mac, vid);
if (err) {
netdev_warn(dev, "could not forget mac address %pM", mac);
return err;
}
err = sparx5_pgid_free(spx5, pgid_idx);
if (err) {
netdev_err(dev, "attempted to free already freed pgid\n");
return err;
}
return 0;
}
static int sparx5_handle_port_mdb_del(struct net_device *dev,
struct notifier_block *nb,
const struct switchdev_obj_port_mdb *v)
{
struct sparx5_port *port = netdev_priv(dev);
struct sparx5 *spx5 = port->sparx5;
u16 pgid_idx, vid;
u32 mact_entry, res, pgid_entry[3];
int err;
if (!br_vlan_enabled(spx5->hw_bridge_dev))
vid = 1;
else
vid = v->vid;
res = sparx5_mact_find(spx5, v->addr, vid, &mact_entry);
if (res) {
pgid_idx = LRN_MAC_ACCESS_CFG_2_MAC_ENTRY_ADDR_GET(mact_entry);
/* MC_IDX has an offset of 65 in the PGID table. */
pgid_idx += PGID_MCAST_START;
sparx5_pgid_update_mask(port, pgid_idx, false);
pgid_entry[0] = spx5_rd(spx5, ANA_AC_PGID_CFG(pgid_idx));
pgid_entry[1] = spx5_rd(spx5, ANA_AC_PGID_CFG1(pgid_idx));
pgid_entry[2] = spx5_rd(spx5, ANA_AC_PGID_CFG2(pgid_idx));
if (pgid_entry[0] == 0 && pgid_entry[1] == 0 && pgid_entry[2] == 0) {
/* No ports are in MC group. Remove entry */
err = sparx5_mdb_del_entry(dev, spx5, v->addr, vid, pgid_idx);
if (err)
return err;
}
}
return 0;
}
static int sparx5_handle_port_obj_add(struct net_device *dev,
struct notifier_block *nb,
struct switchdev_notifier_port_obj_info *info)
@ -398,6 +501,10 @@ static int sparx5_handle_port_obj_add(struct net_device *dev,
err = sparx5_handle_port_vlan_add(dev, nb,
SWITCHDEV_OBJ_PORT_VLAN(obj));
break;
case SWITCHDEV_OBJ_ID_PORT_MDB:
err = sparx5_handle_port_mdb_add(dev, nb,
SWITCHDEV_OBJ_PORT_MDB(obj));
break;
default:
err = -EOPNOTSUPP;
break;
@ -446,6 +553,10 @@ static int sparx5_handle_port_obj_del(struct net_device *dev,
err = sparx5_handle_port_vlan_del(dev, nb,
SWITCHDEV_OBJ_PORT_VLAN(obj)->vid);
break;
case SWITCHDEV_OBJ_ID_PORT_MDB:
err = sparx5_handle_port_mdb_del(dev, nb,
SWITCHDEV_OBJ_PORT_MDB(obj));
break;
default:
err = -EOPNOTSUPP;
break;