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net: dsa: add switch notifier

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Add a notifier block per DSA switch, registered against a notifier head
in the switch fabric they belong to.

This infrastructure will allow to propagate fabric-wide events such as
port bridging, VLAN configuration, etc. If a DSA switch driver cares
about cross-chip configuration, such events can be caught.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vivien Didelot
2017-02-03 13:20:20 -05:00
committed by David S. Miller
parent c5d35cb32c
commit f515f192ab
6 changed files with 77 additions and 0 deletions
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7
include/net/dsa.h
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@@ -13,6 +13,7 @@
#include <linux/if_ether.h>
#include <linux/list.h>
#include <linux/notifier.h>
#include <linux/timer.h>
#include <linux/workqueue.h>
#include <linux/of.h>
@@ -92,6 +93,9 @@ struct packet_type;
struct dsa_switch_tree {
struct list_head list;
/* Notifier chain for switch-wide events */
struct raw_notifier_head nh;
/* Tree identifier */
u32 tree;
@@ -182,6 +186,9 @@ struct dsa_switch {
struct dsa_switch_tree *dst;
int index;
/* Listener for switch fabric events */
struct notifier_block nb;
/*
* Give the switch driver somewhere to hang its private data
* structure.