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net: dsa: felix: allow flooding for all traffic classes

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Right now it can be seen that the VSC9959 (Felix) switch will not flood
frames if they have a VLAN tag with a PCP of 1-7 (nonzero).

It turns out that Felix is quite different from its cousin, Ocelot, in
that frame flooding can be allowed/denied per traffic class. Where
Ocelot has 1 instance of the ANA_FLOODING register, Felix has 8.

The approach that this driver is going to take is "thanks, but no
thanks". We have no use case of limiting the flooding domain based on
traffic class, so we just want to allow packets to be flooded, no matter
what traffic class they have.

So we copy the line of code from ocelot.c which does the one-shot
initialization of the flooding PGIDs, and we add it to felix.c as well -
except replicated 8 times.

Signed-off-by: Xiaoliang Yang <xiaoliang.yang_1@nxp.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xiaoliang Yang 2020-04-21 21:13:47 +03:00 committed by David S. Miller
parent dfddb54043
commit 3c7b51bd39
2 changed files with 8 additions and 0 deletions
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7
drivers/net/dsa/ocelot/felix.c
View File

@ -522,6 +522,7 @@ static int felix_setup(struct dsa_switch *ds)
struct ocelot *ocelot = ds->priv;
struct felix *felix = ocelot_to_felix(ocelot);
int port, err;
int tc;
err = felix_init_structs(felix, ds->num_ports);
if (err)
@ -555,6 +556,12 @@ static int felix_setup(struct dsa_switch *ds)
ocelot_write_rix(ocelot,
ANA_PGID_PGID_PGID(GENMASK(ocelot->num_phys_ports, 0)),
ANA_PGID_PGID, PGID_UC);
/* Setup the per-traffic class flooding PGIDs */
for (tc = 0; tc < FELIX_NUM_TC; tc++)
ocelot_write_rix(ocelot, ANA_FLOODING_FLD_MULTICAST(PGID_MC) |
ANA_FLOODING_FLD_BROADCAST(PGID_MC) |
ANA_FLOODING_FLD_UNICAST(PGID_UC),
ANA_FLOODING, tc);
ds->mtu_enforcement_ingress = true;
/* It looks like the MAC/PCS interrupt register - PM0_IEVENT (0x8040)

1
drivers/net/dsa/ocelot/felix.h
View File

@ -5,6 +5,7 @@
#define _MSCC_FELIX_H
#define ocelot_to_felix(o) container_of((o), struct felix, ocelot)
#define FELIX_NUM_TC 8
/* Platform-specific information */
struct felix_info {