void dev_activate(struct net_device *dev)
{
int need_watchdog;
/* No queueing discipline is attached to device;
create default one i.e. pfifo_fast for devices,
which need queueing and noqueue_qdisc for
virtual interfaces
*/
if (dev_all_qdisc_sleeping_noop(dev))
netdev_for_each_tx_queue(dev, attach_one_default_qdisc, NULL);
if (!netif_carrier_ok(dev))
/* Delay activation until next carrier-on event */
return;
need_watchdog = 0;
netdev_for_each_tx_queue(dev, transition_one_qdisc, &need_watchdog);
transition_one_qdisc(dev, &dev->rx_queue, NULL);
if (need_watchdog) {
dev->trans_start = jiffies;
dev_watchdog_up(dev);
}
}
static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
{
lockdep_set_class_and_subclass(&dev->addr_list_lock,
&vlan_netdev_addr_lock_key,
subclass);
netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);
}
void dev_init_scheduler(struct net_device *dev)
{
netdev_for_each_tx_queue(dev, dev_init_scheduler_queue, &noop_qdisc);
dev_init_scheduler_queue(dev, &dev->rx_queue, &noop_qdisc);
setup_timer(&dev->watchdog_timer, dev_watchdog, (unsigned long)dev);
}
void dev_activate(struct net_device *dev)
{
int need_watchdog;
/* No queueing discipline is attached to device;
* create default one for devices, which need queueing
* and noqueue_qdisc for virtual interfaces
*/
if (dev->qdisc == &noop_qdisc)
attach_default_qdiscs(dev);
if (!netif_carrier_ok(dev))
/* Delay activation until next carrier-on event */
return;
need_watchdog = 0;
netdev_for_each_tx_queue(dev, transition_one_qdisc, &need_watchdog);
if (dev_ingress_queue(dev))
transition_one_qdisc(dev, dev_ingress_queue(dev), NULL);
if (need_watchdog) {
netif_trans_update(dev);
dev_watchdog_up(dev);
}
}
void dev_deactivate(struct net_device *dev)
{
netdev_for_each_tx_queue(dev, dev_deactivate_queue, &noop_qdisc);
dev_deactivate_queue(dev, &dev->rx_queue, &noop_qdisc);
dev_watchdog_down(dev);
/* Wait for outstanding qdisc-less dev_queue_xmit calls. */
synchronize_rcu();
/* Wait for outstanding qdisc_run calls. */
while (some_qdisc_is_busy(dev))
yield();
}
/**
* dev_deactivate_many - deactivate transmissions on several devices
* @head: list of devices to deactivate
*
* This function returns only when all outstanding transmissions
* have completed, unless all devices are in dismantle phase.
*/
void dev_deactivate_many(struct list_head *head)
{
struct net_device *dev;
bool sync_needed = false;
list_for_each_entry(dev, head, close_list) {
netdev_for_each_tx_queue(dev, dev_deactivate_queue,
&noop_qdisc);
if (dev_ingress_queue(dev))
dev_deactivate_queue(dev, dev_ingress_queue(dev),
&noop_qdisc);
dev_watchdog_down(dev);
sync_needed |= !dev->dismantle;
}
static void attach_default_qdiscs(struct net_device *dev)
{
struct netdev_queue *txq;
struct Qdisc *qdisc;
txq = netdev_get_tx_queue(dev, 0);
if (!netif_is_multiqueue(dev) ||
dev->priv_flags & IFF_NO_QUEUE) {
netdev_for_each_tx_queue(dev, attach_one_default_qdisc, NULL);
dev->qdisc = txq->qdisc_sleeping;
atomic_inc(&dev->qdisc->refcnt);
} else {
qdisc = qdisc_create_dflt(txq, &mq_qdisc_ops, TC_H_ROOT);
if (qdisc) {
dev->qdisc = qdisc;
qdisc->ops->attach(qdisc);
}
}
}
int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
int port, char *name)
{
struct net_device *master = ds->dst->master_netdev;
struct net_device *slave_dev;
struct dsa_slave_priv *p;
int ret;
slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
NET_NAME_UNKNOWN, ether_setup);
if (slave_dev == NULL)
return -ENOMEM;
slave_dev->features = master->vlan_features;
slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
eth_hw_addr_inherit(slave_dev, master);
slave_dev->priv_flags |= IFF_NO_QUEUE;
slave_dev->netdev_ops = &dsa_slave_netdev_ops;
slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
NULL);
SET_NETDEV_DEV(slave_dev, parent);
slave_dev->dev.of_node = ds->pd->port_dn[port];
slave_dev->vlan_features = master->vlan_features;
p = netdev_priv(slave_dev);
p->dev = slave_dev;
p->parent = ds;
p->port = port;
switch (ds->dst->tag_protocol) {
#ifdef CONFIG_NET_DSA_TAG_DSA
case DSA_TAG_PROTO_DSA:
p->xmit = dsa_netdev_ops.xmit;
break;
#endif
#ifdef CONFIG_NET_DSA_TAG_EDSA
case DSA_TAG_PROTO_EDSA:
p->xmit = edsa_netdev_ops.xmit;
break;
#endif
#ifdef CONFIG_NET_DSA_TAG_TRAILER
case DSA_TAG_PROTO_TRAILER:
p->xmit = trailer_netdev_ops.xmit;
break;
#endif
#ifdef CONFIG_NET_DSA_TAG_BRCM
case DSA_TAG_PROTO_BRCM:
p->xmit = brcm_netdev_ops.xmit;
break;
#endif
default:
p->xmit = dsa_slave_notag_xmit;
break;
}
p->old_pause = -1;
p->old_link = -1;
p->old_duplex = -1;
ds->ports[port] = slave_dev;
ret = register_netdev(slave_dev);
if (ret) {
netdev_err(master, "error %d registering interface %s\n",
ret, slave_dev->name);
ds->ports[port] = NULL;
free_netdev(slave_dev);
return ret;
}
netif_carrier_off(slave_dev);
ret = dsa_slave_phy_setup(p, slave_dev);
if (ret) {
netdev_err(master, "error %d setting up slave phy\n", ret);
unregister_netdev(slave_dev);
free_netdev(slave_dev);
return ret;
}
return 0;
}
void dev_shutdown(struct net_device *dev)
{
netdev_for_each_tx_queue(dev, shutdown_scheduler_queue, &noop_qdisc);
shutdown_scheduler_queue(dev, &dev->rx_queue, &noop_qdisc);
WARN_ON(timer_pending(&dev->watchdog_timer));
}
static void nr_set_lockdep_key(struct net_device *dev)
{
lockdep_set_class(&dev->addr_list_lock, &nr_netdev_addr_lock_key);
netdev_for_each_tx_queue(dev, nr_set_lockdep_one, NULL);
}
/**
* batadv_set_lockdep_class - Set txq and addr_list lockdep class
* @dev: network device to modify
*/
static void batadv_set_lockdep_class(struct net_device *dev)
{
lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key);
netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL);
}
