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net: dsa: Associate slave network device with CPU port 

In preparation for supporting multiple CPU ports with DSA, have the
dsa_port structure know which CPU it is associated with. This will be
important in order to make sure the correct CPU is used for transmission
of the frames. If not for functional reasons, for performance (e.g: load
balancing) and forwarding decisions.

Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
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 2017-06-13 13:27:21 -07:00 committed by David S. Miller
parent 67dbb9d433
commit a29342e739
5 changed files with 17 additions and 2 deletions
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1
include/net/dsa.h
View File

@ -171,6 +171,7 @@ struct dsa_port {
struct dsa_switch *ds;
unsigned int index;
const char *name;
struct dsa_port *cpu_dp;
struct net_device *netdev;
struct device_node *dn;
unsigned int ageing_time;

11
net/dsa/dsa2.c
View File

@ -490,6 +490,8 @@ static int dsa_cpu_parse(struct dsa_port *port, u32 index,
enum dsa_tag_protocol tag_protocol;
struct net_device *ethernet_dev;
struct device_node *ethernet;
struct dsa_port *p;
unsigned int i;
if (port->dn) {
ethernet = of_parse_phandle(port->dn, "ethernet", 0);
@ -507,6 +509,15 @@ static int dsa_cpu_parse(struct dsa_port *port, u32 index,
if (!dst->cpu_dp) {
dst->cpu_dp = port;
dst->cpu_dp->netdev = ethernet_dev;
for (i = 0; i < ds->num_ports; i++) {
p = &ds->ports[i];
if (!dsa_port_is_valid(p) ||
i == index)
continue;
p->cpu_dp = port;
}
}
tag_protocol = ds->ops->get_tag_protocol(ds);

2
net/dsa/dsa_priv.h
View File

@ -185,7 +185,7 @@ extern const struct dsa_device_ops trailer_netdev_ops;
static inline struct net_device *dsa_master_netdev(struct dsa_slave_priv *p)
{
return p->dp->ds->dst->cpu_dp->netdev;
return p->dp->cpu_dp->netdev;
}
#endif

1
net/dsa/legacy.c
View File

@ -129,6 +129,7 @@ static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
ds->dsa_port_mask |= 1 << i;
} else {
ds->enabled_port_mask |= 1 << i;
ds->ports[i].cpu_dp = dst->cpu_dp;
}
valid_name_found = true;
}

4
net/dsa/slave.c
View File

@ -1140,9 +1140,11 @@ int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
struct net_device *master;
struct net_device *slave_dev;
struct dsa_slave_priv *p;
struct dsa_port *cpu_dp;
int ret;
master = ds->dst->cpu_dp->netdev;
cpu_dp = ds->dst->cpu_dp;
master = cpu_dp->netdev;
slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
NET_NAME_UNKNOWN, ether_setup);