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net: dsa: Add support for DSA specific notifiers

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In preparation for communicating a given DSA network device's port
number and switch index, create a specialized DSA notifier and two
events: DSA_PORT_REGISTER and DSA_PORT_UNREGISTER that communicate: the
slave network device (slave_dev), port number and switch number in the
tree.

This will be later used for network device drivers like bcmsysport which
needs to cooperate with its DSA network devices to set-up queue mapping
and scheduling.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2017-10-11 10:57:48 -07:00 • committed by David S. Miller
parent 3f7832c26c
commit 60724d4bae
3 changed files with 81 additions and 0 deletions
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13
net/dsa/slave.c
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@ -1116,6 +1116,7 @@ int dsa_slave_resume(struct net_device *slave_dev)
int dsa_slave_create(struct dsa_port *port, const char *name)
{
struct dsa_notifier_register_info rinfo = { };
struct dsa_switch *ds = port->ds;
struct net_device *master;
struct net_device *slave_dev;
@ -1177,6 +1178,12 @@ int dsa_slave_create(struct dsa_port *port, const char *name)
goto out_free;
}
rinfo.info.dev = slave_dev;
rinfo.master = master;
rinfo.port_number = p->dp->index;
rinfo.switch_number = p->dp->ds->index;
call_dsa_notifiers(DSA_PORT_REGISTER, slave_dev, &rinfo.info);
ret = register_netdev(slave_dev);
if (ret) {
netdev_err(master, "error %d registering interface %s\n",
@ -1200,6 +1207,7 @@ out_free:
void dsa_slave_destroy(struct net_device *slave_dev)
{
struct dsa_slave_priv *p = netdev_priv(slave_dev);
struct dsa_notifier_register_info rinfo = { };
struct device_node *port_dn;
port_dn = p->dp->dn;
@ -1211,6 +1219,11 @@ void dsa_slave_destroy(struct net_device *slave_dev)
if (of_phy_is_fixed_link(port_dn))
of_phy_deregister_fixed_link(port_dn);
}
rinfo.info.dev = slave_dev;
rinfo.master = p->dp->cpu_dp->netdev;
rinfo.port_number = p->dp->index;
rinfo.switch_number = p->dp->ds->index;
call_dsa_notifiers(DSA_PORT_UNREGISTER, slave_dev, &rinfo.info);
unregister_netdev(slave_dev);
free_percpu(p->stats64);
free_netdev(slave_dev);