diff options
| author | Vladimir Oltean <vladimir.oltean@nxp.com> | 2022-03-08 11:15:14 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-03-09 11:12:10 +0000 |
| commit | f2e2662ccf483392a1f7517258c3aa6539264d44 (patch) | |
| tree | 20911cde337a234667dde9a64412da4ee77c0315 /drivers | |
| parent | e2d0576f0c009acdba63e1d763276743ff3788cc (diff) | |
net: dsa: felix: actually disable flooding towards NPI port
The two blamed commits were written/tested individually but not
together.
When put together, commit 90897569beb1 ("net: dsa: felix: start off with
flooding disabled on the CPU port"), which deletes a reinitialization of
PGID_UC/PGID_MC/PGID_BC, is no longer sufficient to ensure that these
port masks don't contain the CPU port module.
This is because commit b903a6bd2e19 ("net: dsa: felix: migrate flood
settings from NPI to tag_8021q CPU port") overwrites the hardware
default settings towards the CPU port module with the settings that used
to be present on the NPI port treated as a regular port. There, flooding
is enabled, so flooding would get enabled on the CPU port module too.
Adding conditional logic somewhere within felix_setup_tag_npi() to
configure either the default no-flood policy or the flood policy
inherited from the tag_8021q CPU port from a previous call to
dsa_port_manage_cpu_flood() is getting complicated. So just let the
migration logic do its thing during initial setup (which will
temporarily turn on flooding), then turn flooding off for the NPI port
after felix_set_tag_protocol() finishes. Here we are in felix_setup(),
so the DSA slave interfaces are not yet created, and this doesn't affect
traffic in any way.
Fixes: 90897569beb1 ("net: dsa: felix: start off with flooding disabled on the CPU port")
Fixes: b903a6bd2e19 ("net: dsa: felix: migrate flood settings from NPI to tag_8021q CPU port")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/dsa/ocelot/felix.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c index 2c58031e209c..e475186b70c7 100644 --- a/drivers/net/dsa/ocelot/felix.c +++ b/drivers/net/dsa/ocelot/felix.c @@ -1343,6 +1343,7 @@ static int felix_setup(struct dsa_switch *ds) { struct ocelot *ocelot = ds->priv; struct felix *felix = ocelot_to_felix(ocelot); + unsigned long cpu_flood; struct dsa_port *dp; int err; @@ -1381,6 +1382,14 @@ static int felix_setup(struct dsa_switch *ds) * there's no real point in checking for errors. */ felix_set_tag_protocol(ds, dp->index, felix->tag_proto); + + /* Start off with flooding disabled towards the NPI port + * (actually CPU port module). + */ + cpu_flood = ANA_PGID_PGID_PGID(BIT(ocelot->num_phys_ports)); + ocelot_rmw_rix(ocelot, 0, cpu_flood, ANA_PGID_PGID, PGID_UC); + ocelot_rmw_rix(ocelot, 0, cpu_flood, ANA_PGID_PGID, PGID_MC); + break; } |