diff options
| author | Vladimir Oltean <vladimir.oltean@nxp.com> | 2022-09-11 04:06:59 +0300 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2022-09-20 10:32:35 +0200 |
| commit | 95f510d0b792f308d3d748242fe960c35bdc2c62 (patch) | |
| tree | 83df40a0b45f905a61e582d0ca7bbbcb62035705 /net/dsa/dsa2.c | |
| parent | 8f6a19c0316deb48cdfdc5335de9a6d7db5b7b62 (diff) | |
net: dsa: allow the DSA master to be seen and changed through rtnetlink
Some DSA switches have multiple CPU ports, which can be used to improve
CPU termination throughput, but DSA, through dsa_tree_setup_cpu_ports(),
sets up only the first one, leading to suboptimal use of hardware.
The desire is to not change the default configuration but to permit the
user to create a dynamic mapping between individual user ports and the
CPU port that they are served by, configurable through rtnetlink. It is
also intended to permit load balancing between CPU ports, and in that
case, the foreseen model is for the DSA master to be a bonding interface
whose lowers are the physical DSA masters.
To that end, we create a struct rtnl_link_ops for DSA user ports with
the "dsa" kind. We expose the IFLA_DSA_MASTER link attribute that
contains the ifindex of the newly desired DSA master.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'net/dsa/dsa2.c')
| -rw-r--r-- | net/dsa/dsa2.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c index f1f96e2e56aa2..42422ddea59b9 100644 --- a/net/dsa/dsa2.c +++ b/net/dsa/dsa2.c @@ -387,6 +387,20 @@ static struct dsa_port *dsa_tree_find_first_cpu(struct dsa_switch_tree *dst) return NULL; } +struct net_device *dsa_tree_find_first_master(struct dsa_switch_tree *dst) +{ + struct device_node *ethernet; + struct net_device *master; + struct dsa_port *cpu_dp; + + cpu_dp = dsa_tree_find_first_cpu(dst); + ethernet = of_parse_phandle(cpu_dp->dn, "ethernet", 0); + master = of_find_net_device_by_node(ethernet); + of_node_put(ethernet); + + return master; +} + /* Assign the default CPU port (the first one in the tree) to all ports of the * fabric which don't already have one as part of their own switch. */ |