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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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45
include/net/dsa.h
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@@ -471,4 +471,49 @@ static inline int dsa_switch_resume(struct dsa_switch *ds)
}
#endif /* CONFIG_PM_SLEEP */
enum dsa_notifier_type {
DSA_PORT_REGISTER,
DSA_PORT_UNREGISTER,
};
struct dsa_notifier_info {
struct net_device *dev;
};
struct dsa_notifier_register_info {
struct dsa_notifier_info info; /* must be first */
struct net_device *master;
unsigned int port_number;
unsigned int switch_number;
};
static inline struct net_device *
dsa_notifier_info_to_dev(const struct dsa_notifier_info *info)
{
return info->dev;
}
#if IS_ENABLED(CONFIG_NET_DSA)
int register_dsa_notifier(struct notifier_block *nb);
int unregister_dsa_notifier(struct notifier_block *nb);
int call_dsa_notifiers(unsigned long val, struct net_device *dev,
struct dsa_notifier_info *info);
#else
static inline int register_dsa_notifier(struct notifier_block *nb)
{
return 0;
}
static inline int unregister_dsa_notifier(struct notifier_block *nb)
{
return 0;
}
static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev,
struct dsa_notifier_info *info)
{
return NOTIFY_DONE;
}
#endif
#endif