// SPDX-License-Identifier: GPL-2.0+
#include <linux/if_bridge.h>
#include "lan966x_main.h"
static void lan966x_lag_set_aggr_pgids(struct lan966x *lan966x)
{
u32 visited = GENMASK(lan966x->num_phys_ports - 1, 0);
int p, lag, i;
/* Reset destination and aggregation PGIDS */
for (p = 0; p < lan966x->num_phys_ports; ++p)
lan_wr(ANA_PGID_PGID_SET(BIT(p)),
lan966x, ANA_PGID(p));
for (p = PGID_AGGR; p < PGID_SRC; ++p)
lan_wr(ANA_PGID_PGID_SET(visited),
lan966x, ANA_PGID(p));
/* The visited ports bitmask holds the list of ports offloading any
* bonding interface. Initially we mark all these ports as unvisited,
* then every time we visit a port in this bitmask, we know that it is
* the lowest numbered port, i.e. the one whose logical ID == physical
* port ID == LAG ID. So we mark as visited all further ports in the
* bitmask that are offloading the same bonding interface. This way,
* we set up the aggregation PGIDs only once per bonding interface.
*/
for (p = 0; p < lan966x->num_phys_ports; ++p) {
struct lan966x_port *port = lan966x->ports[p];
if (!port || !port->bond)
continue;
visited &= ~BIT(p);
}
/* Now, set PGIDs for each active LAG */
for (lag = 0; lag < lan966x->num_phys_ports; ++lag) {
struct lan966x_port *port = lan966x->ports[lag];
int num_active_ports = 0;
struct net_device *bond;
unsigned long bond_mask;
u8 aggr_idx[16];
if (!port || !port->bond || (visited & BIT(lag)))
continue;
bond = port->bond;
bond_mask = lan966x_lag_get_mask(lan966x, bond);
for_each_set_bit(p, &bond_mask, lan966x->num_phys_ports) {
struct lan966x_port *port = lan966x->ports[p];
if (!port)
continue;
lan_wr(ANA_PGID_PGID_SET(bond_mask),
lan966x, ANA_PGID(p));
if (port->lag_tx_active)
aggr_idx[num_active_ports++] = p;
}
for (i = PGID_AGGR; i < PGID_SRC; ++i) {
u32 ac;
ac = lan_rd(lan966x, ANA_PGID(i));
ac &= ~bond_mask;
/* Don't do division by zero if there was no active
* port. Just make all aggregation codes zero.
*/
if (num_active_ports)
ac |= BIT(aggr_idx[i % num_active_ports]);
lan_wr(ANA_PGID_PGID_SET(ac),
lan966x, ANA_PGID(i));
}
/* Mark all ports in the same LAG as visited to avoid applying
* the same config again.
*/
for (p = lag; p < lan966x->num_phys_ports; p++) {
struct lan966x_port *port = lan966x->ports[p];
if (!port)
continue;
if (port->bond == bond)
visited |= BIT(p);
}
}
}
static void lan966x_lag_set_port_ids(struct lan966x *lan966x)
{
struct lan966x_port *port;
u32 bond_mask;
u32 lag_id;
int p;
for (p = 0; p < lan966x->num_phys_ports; ++p) {
port = lan966x->ports[p];
if (!port)
continue;
lag_id = port->chip_port;
bond_mask = lan966x_lag_get_mask(lan966x, port->bond);
if (bond_mask)
lag_id = __ffs(bond_mask);
lan_rmw(ANA_PORT_CFG_PORTID_VAL_SET(lag_id),
ANA_PORT_CFG_PORTID_VAL,
lan966x, ANA_PORT_CFG(port->chip_port));
}
}
static void lan966x_lag_update_ids(struct lan966x *lan966x)
{
lan966x_lag_set_port_ids(lan966x);
lan966x_update_fwd_mask(lan966x);
lan966x_lag_set_aggr_pgids(lan966x);
}
int lan966x_lag_port_join(struct lan966x_port *port,
struct net_device *brport_dev,
struct net_device *bond,
struct netlink_ext_ack *extack)
{
struct lan966x *lan966x = port->lan966x;
struct net_device *dev = port->dev;
u32 lag_id = -1;
u32 bond_mask;
int err;
bond_mask = lan966x_lag_get_mask(lan966x, bond);
if (bond_mask)
lag_id = __ffs(bond_mask);
port->bond = bond;
lan966x_lag_update_ids(lan966x);
err = switchdev_bridge_port_offload(brport_dev, dev, port,
&lan966x_switchdev_nb,
&lan966x_switchdev_blocking_nb,
false, extack);
if (err)
goto out;
lan966x_port_stp_state_set(port, br_port_get_stp_state(brport_dev));
if (lan966x_lag_first_port(port->bond, port->dev) &&
lag_id != -1)
lan966x_mac_lag_replace_port_entry(lan966x,
lan966x->ports[lag_id],
port);
return 0;
out:
port->bond = NULL;
lan966x_lag_update_ids(lan966x);
return err;
}
void lan966x_lag_port_leave(struct lan966x_port *port, struct net_device *bond)
{
struct lan966x *lan966x = port->lan966x;
u32 bond_mask;
u32 lag_id;
if (lan966x_lag_first_port(port->bond, port->dev)) {
bond_mask = lan966x_lag_get_mask(lan966x, port->bond);
bond_mask &= ~BIT(port->chip_port);
if (bond_mask) {
lag_id = __ffs(bond_mask);
lan966x_mac_lag_replace_port_entry(lan966x, port,
lan966x->ports[lag_id]);
} else {
lan966x_mac_lag_remove_port_entry(lan966x, port);
}
}
port->bond = NULL;
lan966x_lag_update_ids(lan966x);
lan966x_port_stp_state_set(port, BR_STATE_FORWARDING);
}
static bool lan966x_lag_port_check_hash_types(struct lan966x *lan966x,
enum netdev_lag_hash hash_type)
{
int p;
for (p = 0; p < lan966x->num_phys_ports; ++p) {
struct lan966x_port *port = lan966x->ports[p];
if (!port || !port->bond)
continue;
if (port->hash_type != hash_type)
return false;
}
return true;
}
int lan966x_lag_port_prechangeupper(struct net_device *dev,
struct netdev_notifier_changeupper_info *info)
{
struct lan966x_port *port = netdev_priv(dev);
struct lan966x *lan966x = port->lan966x;
struct netdev_lag_upper_info *lui;
struct netlink_ext_ack *extack;
extack = netdev_notifier_info_to_extack(&info->info);
lui = info->upper_info;
if (!lui) {
port->hash_type = NETDEV_LAG_HASH_NONE;
return NOTIFY_DONE;
}
if (lui->tx_type != NETDEV_LAG_TX_TYPE_HASH) {
NL_SET_ERR_MSG_MOD(extack,
"LAG device using unsupported Tx type");
return -EINVAL;
}
if (!lan966x_lag_port_check_hash_types(lan966x, lui->hash_type)) {
NL_SET_ERR_MSG_MOD(extack,
"LAG devices can have only the same hash_type");
return -EINVAL;
}
switch (lui->hash_type) {
case NETDEV_LAG_HASH_L2:
lan_wr(ANA_AGGR_CFG_AC_DMAC_ENA_SET(1) |
ANA_AGGR_CFG_AC_SMAC_ENA_SET(1),
lan966x, ANA_AGGR_CFG);
break;
case NETDEV_LAG_HASH_L34:
lan_wr(ANA_AGGR_CFG_AC_IP6_TCPUDP_ENA_SET(1) |
ANA_AGGR_CFG_AC_IP4_TCPUDP_ENA_SET(1) |
ANA_AGGR_CFG_AC_IP4_SIPDIP_ENA_SET(1),
lan966x, ANA_AGGR_CFG);
break;
case NETDEV_LAG_HASH_L23:
lan_wr(ANA_AGGR_CFG_AC_DMAC_ENA_SET(1) |
ANA_AGGR_CFG_AC_SMAC_ENA_SET(1) |
ANA_AGGR_CFG_AC_IP6_TCPUDP_ENA_SET(1) |
ANA_AGGR_CFG_AC_IP4_TCPUDP_ENA_SET(1),
lan966x, ANA_AGGR_CFG);
break;
default:
NL_SET_ERR_MSG_MOD(extack,
"LAG device using unsupported hash type");
return -EINVAL;
}
port->hash_type = lui->hash_type;
return NOTIFY_OK;
}
int lan966x_lag_port_changelowerstate(struct net_device *dev,
struct netdev_notifier_changelowerstate_info *info)
{
struct netdev_lag_lower_state_info *lag = info->lower_state_info;
struct lan966x_port *port = netdev_priv(dev);
struct lan966x *lan966x = port->lan966x;
bool is_active;
if (!port->bond)
return NOTIFY_DONE;
is_active = lag->link_up && lag->tx_enabled;
if (port->lag_tx_active == is_active)
return NOTIFY_DONE;
port->lag_tx_active = is_active;
lan966x_lag_set_aggr_pgids(lan966x);
return NOTIFY_OK;
}
int lan966x_lag_netdev_prechangeupper(struct net_device *dev,
struct netdev_notifier_changeupper_info *info)
{
struct lan966x_port *port;
struct net_device *lower;
struct list_head *iter;
int err;
netdev_for_each_lower_dev(dev, lower, iter) {
if (!lan966x_netdevice_check(lower))
continue;
port = netdev_priv(lower);
if (port->bond != dev)
continue;
err = lan966x_port_prechangeupper(lower, dev, info);
if (err)
return err;
}
return NOTIFY_DONE;
}
int lan966x_lag_netdev_changeupper(struct net_device *dev,
struct netdev_notifier_changeupper_info *info)
{
struct lan966x_port *port;
struct net_device *lower;
struct list_head *iter;
int err;
netdev_for_each_lower_dev(dev, lower, iter) {
if (!lan966x_netdevice_check(lower))
continue;
port = netdev_priv(lower);
if (port->bond != dev)
continue;
err = lan966x_port_changeupper(lower, dev, info);
if (err)
return err;
}
return NOTIFY_DONE;
}
bool lan966x_lag_first_port(struct net_device *lag, struct net_device *dev)
{
struct lan966x_port *port = netdev_priv(dev);
struct lan966x *lan966x = port->lan966x;
unsigned long bond_mask;
if (port->bond != lag)
return false;
bond_mask = lan966x_lag_get_mask(lan966x, lag);
if (bond_mask && port->chip_port == __ffs(bond_mask))
return true;
return false;
}
u32 lan966x_lag_get_mask(struct lan966x *lan966x, struct net_device *bond)
{
struct lan966x_port *port;
u32 mask = 0;
int p;
if (!bond)
return mask;
for (p = 0; p < lan966x->num_phys_ports; p++) {
port = lan966x->ports[p];
if (!port)
continue;
if (port->bond == bond)
mask |= BIT(p);
}
return mask;
}
