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net: dsa: mv88e6xxx: handle multiple ports in ATU

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An address can be loaded in the ATU with multiple ports, for instance
when adding multiple ports to a Multicast group with "bridge mdb".

The current code doesn't allow that. Add an helper to get a single entry
from the ATU, then set or clear the requested port, before loading the
entry back in the ATU.

Note that the required _mv88e6xxx_atu_getnext function is defined below
mv88e6xxx_port_db_load_purge, so forward-declare it for the moment. The
ATU code will be isolated in future patches.

Fixes: 83dabd1fa8 ("net: dsa: mv88e6xxx: make switchdev DB ops generic")
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vivien Didelot 2016-09-19 19:56:11 -04:00 committed by David S. Miller
parent aecc5cefc3
commit 8847293992
1 changed files with 49 additions and 7 deletions
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54
drivers/net/dsa/mv88e6xxx/chip.c
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@ -2091,12 +2091,48 @@ static int _mv88e6xxx_atu_load(struct mv88e6xxx_chip *chip,
return _mv88e6xxx_atu_cmd(chip, entry->fid, GLOBAL_ATU_OP_LOAD_DB);
}
static int _mv88e6xxx_atu_getnext(struct mv88e6xxx_chip *chip, u16 fid,
struct mv88e6xxx_atu_entry *entry);
static int mv88e6xxx_atu_get(struct mv88e6xxx_chip *chip, int fid,
const u8 *addr, struct mv88e6xxx_atu_entry *entry)
{
struct mv88e6xxx_atu_entry next;
int err;
eth_broadcast_addr(next.mac);
err = _mv88e6xxx_atu_mac_write(chip, next.mac);
if (err)
return err;
do {
err = _mv88e6xxx_atu_getnext(chip, fid, &next);
if (err)
return err;
if (next.state == GLOBAL_ATU_DATA_STATE_UNUSED)
break;
if (ether_addr_equal(next.mac, addr)) {
*entry = next;
return 0;
}
} while (!is_broadcast_ether_addr(next.mac));
memset(entry, 0, sizeof(*entry));
entry->fid = fid;
ether_addr_copy(entry->mac, addr);
return 0;
}
static int mv88e6xxx_port_db_load_purge(struct mv88e6xxx_chip *chip, int port,
const unsigned char *addr, u16 vid,
u8 state)
{
struct mv88e6xxx_atu_entry entry = { 0 };
struct mv88e6xxx_vtu_stu_entry vlan;
struct mv88e6xxx_atu_entry entry;
int err;
/* Null VLAN ID corresponds to the port private database */
@ -2107,12 +2143,18 @@ static int mv88e6xxx_port_db_load_purge(struct mv88e6xxx_chip *chip, int port,
if (err)
return err;
entry.fid = vlan.fid;
err = mv88e6xxx_atu_get(chip, vlan.fid, addr, &entry);
if (err)
return err;
/* Purge the ATU entry only if no port is using it anymore */
if (state == GLOBAL_ATU_DATA_STATE_UNUSED) {
entry.portv_trunkid &= ~BIT(port);
if (!entry.portv_trunkid)
entry.state = GLOBAL_ATU_DATA_STATE_UNUSED;
} else {
entry.portv_trunkid |= BIT(port);
entry.state = state;
ether_addr_copy(entry.mac, addr);
if (state != GLOBAL_ATU_DATA_STATE_UNUSED) {
entry.trunk = false;
entry.portv_trunkid = BIT(port);
}
return _mv88e6xxx_atu_load(chip, &entry);