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net: mscc: ocelot: set up the bonding mask in a way that avoids a net_device 

Since this code should be called from pure switchdev as well as from
DSA, we must find a way to determine the bonding mask not by looking
directly at the net_device lowers of the bonding interface, since those
could have different private structures.

We keep a pointer to the bonding upper interface, if present, in struct
ocelot_port. Then the bonding mask becomes the bitwise OR of all ports
that have the same bonding upper interface. This adds a duplication of
functionality with the current "lags" array, but the duplication will be
short-lived, since further patches will remove the latter completely.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Vladimir Oltean 2021-02-06 00:02:14 +02:00 committed by Jakub Kicinski
parent f79c20c817
commit b80af65969
2 changed files with 24 additions and 7 deletions
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29
drivers/net/ethernet/mscc/ocelot.c
View File

@ -889,6 +889,24 @@ int ocelot_get_ts_info(struct ocelot *ocelot, int port,
}
EXPORT_SYMBOL(ocelot_get_ts_info);
static u32 ocelot_get_bond_mask(struct ocelot *ocelot, struct net_device *bond)
{
u32 mask = 0;
int port;
for (port = 0; port < ocelot->num_phys_ports; port++) {
struct ocelot_port *ocelot_port = ocelot->ports[port];
if (!ocelot_port)
continue;
if (ocelot_port->bond == bond)
mask |= BIT(port);
}
return mask;
}
static u32 ocelot_get_dsa_8021q_cpu_mask(struct ocelot *ocelot)
{
u32 mask = 0;
@ -1319,20 +1337,15 @@ int ocelot_port_lag_join(struct ocelot *ocelot, int port,
struct net_device *bond,
struct netdev_lag_upper_info *info)
{
struct net_device *ndev;
u32 bond_mask = 0;
int lag, lp;
if (info->tx_type != NETDEV_LAG_TX_TYPE_HASH)
return -EOPNOTSUPP;
rcu_read_lock();
for_each_netdev_in_bond_rcu(bond, ndev) {
struct ocelot_port_private *priv = netdev_priv(ndev);
ocelot->ports[port]->bond = bond;
bond_mask |= BIT(priv->chip_port);
}
rcu_read_unlock();
bond_mask = ocelot_get_bond_mask(ocelot, bond);
lp = __ffs(bond_mask);
@ -1366,6 +1379,8 @@ void ocelot_port_lag_leave(struct ocelot *ocelot, int port,
u32 port_cfg;
int i;
ocelot->ports[port]->bond = NULL;
/* Remove port from any lag */
for (i = 0; i < ocelot->num_phys_ports; i++)
ocelot->lags[i] &= ~BIT(port);

2
include/soc/mscc/ocelot.h
View File

@ -611,6 +611,8 @@ struct ocelot_port {
u8 *xmit_template;
bool is_dsa_8021q_cpu;
struct net_device *bond;
};
struct ocelot {