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-rw-r--r--drivers/net/ethernet/mscc/ocelot.c109
-rw-r--r--drivers/net/ethernet/mscc/ocelot.h16
-rw-r--r--include/soc/mscc/ocelot.h1
3 files changed, 100 insertions, 26 deletions
diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index 713ab6ec8c8d..323dbd30661a 100644
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -961,10 +961,37 @@ static enum macaccess_entry_type ocelot_classify_mdb(const unsigned char *addr)
return ENTRYTYPE_LOCKED;
}
-static int ocelot_mdb_get_pgid(struct ocelot *ocelot,
- const struct ocelot_multicast *mc)
+static struct ocelot_pgid *ocelot_pgid_alloc(struct ocelot *ocelot, int index,
+ unsigned long ports)
{
- int pgid;
+ struct ocelot_pgid *pgid;
+
+ pgid = kzalloc(sizeof(*pgid), GFP_KERNEL);
+ if (!pgid)
+ return ERR_PTR(-ENOMEM);
+
+ pgid->ports = ports;
+ pgid->index = index;
+ refcount_set(&pgid->refcount, 1);
+ list_add_tail(&pgid->list, &ocelot->pgids);
+
+ return pgid;
+}
+
+static void ocelot_pgid_free(struct ocelot *ocelot, struct ocelot_pgid *pgid)
+{
+ if (!refcount_dec_and_test(&pgid->refcount))
+ return;
+
+ list_del(&pgid->list);
+ kfree(pgid);
+}
+
+static struct ocelot_pgid *ocelot_mdb_get_pgid(struct ocelot *ocelot,
+ const struct ocelot_multicast *mc)
+{
+ struct ocelot_pgid *pgid;
+ int index;
/* According to VSC7514 datasheet 3.9.1.5 IPv4 Multicast Entries and
* 3.9.1.6 IPv6 Multicast Entries, "Instead of a lookup in the
@@ -973,24 +1000,34 @@ static int ocelot_mdb_get_pgid(struct ocelot *ocelot,
*/
if (mc->entry_type == ENTRYTYPE_MACv4 ||
mc->entry_type == ENTRYTYPE_MACv6)
- return 0;
+ return ocelot_pgid_alloc(ocelot, 0, mc->ports);
+
+ list_for_each_entry(pgid, &ocelot->pgids, list) {
+ /* When searching for a nonreserved multicast PGID, ignore the
+ * dummy PGID of zero that we have for MACv4/MACv6 entries
+ */
+ if (pgid->index && pgid->ports == mc->ports) {
+ refcount_inc(&pgid->refcount);
+ return pgid;
+ }
+ }
- for_each_nonreserved_multicast_dest_pgid(ocelot, pgid) {
- struct ocelot_multicast *mc;
+ /* Search for a free index in the nonreserved multicast PGID area */
+ for_each_nonreserved_multicast_dest_pgid(ocelot, index) {
bool used = false;
- list_for_each_entry(mc, &ocelot->multicast, list) {
- if (mc->pgid == pgid) {
+ list_for_each_entry(pgid, &ocelot->pgids, list) {
+ if (pgid->index == index) {
used = true;
break;
}
}
if (!used)
- return pgid;
+ return ocelot_pgid_alloc(ocelot, index, mc->ports);
}
- return -1;
+ return ERR_PTR(-ENOSPC);
}
static void ocelot_encode_ports_to_mdb(unsigned char *addr,
@@ -1014,6 +1051,7 @@ int ocelot_port_mdb_add(struct ocelot *ocelot, int port,
struct ocelot_port *ocelot_port = ocelot->ports[port];
unsigned char addr[ETH_ALEN];
struct ocelot_multicast *mc;
+ struct ocelot_pgid *pgid;
u16 vid = mdb->vid;
if (port == ocelot->npi)
@@ -1025,8 +1063,6 @@ int ocelot_port_mdb_add(struct ocelot *ocelot, int port,
mc = ocelot_multicast_get(ocelot, mdb->addr, vid);
if (!mc) {
/* New entry */
- int pgid;
-
mc = devm_kzalloc(ocelot->dev, sizeof(*mc), GFP_KERNEL);
if (!mc)
return -ENOMEM;
@@ -1035,27 +1071,36 @@ int ocelot_port_mdb_add(struct ocelot *ocelot, int port,
ether_addr_copy(mc->addr, mdb->addr);
mc->vid = vid;
- pgid = ocelot_mdb_get_pgid(ocelot, mc);
-
- if (pgid < 0) {
- dev_err(ocelot->dev,
- "No more PGIDs available for mdb %pM vid %d\n",
- mdb->addr, vid);
- return -ENOSPC;
- }
-
- mc->pgid = pgid;
-
list_add_tail(&mc->list, &ocelot->multicast);
} else {
+ /* Existing entry. Clean up the current port mask from
+ * hardware now, because we'll be modifying it.
+ */
+ ocelot_pgid_free(ocelot, mc->pgid);
ocelot_encode_ports_to_mdb(addr, mc);
ocelot_mact_forget(ocelot, addr, vid);
}
mc->ports |= BIT(port);
+
+ pgid = ocelot_mdb_get_pgid(ocelot, mc);
+ if (IS_ERR(pgid)) {
+ dev_err(ocelot->dev,
+ "Cannot allocate PGID for mdb %pM vid %d\n",
+ mc->addr, mc->vid);
+ devm_kfree(ocelot->dev, mc);
+ return PTR_ERR(pgid);
+ }
+ mc->pgid = pgid;
+
ocelot_encode_ports_to_mdb(addr, mc);
- return ocelot_mact_learn(ocelot, mc->pgid, addr, vid,
+ if (mc->entry_type != ENTRYTYPE_MACv4 &&
+ mc->entry_type != ENTRYTYPE_MACv6)
+ ocelot_write_rix(ocelot, pgid->ports, ANA_PGID_PGID,
+ pgid->index);
+
+ return ocelot_mact_learn(ocelot, pgid->index, addr, vid,
mc->entry_type);
}
EXPORT_SYMBOL(ocelot_port_mdb_add);
@@ -1066,6 +1111,7 @@ int ocelot_port_mdb_del(struct ocelot *ocelot, int port,
struct ocelot_port *ocelot_port = ocelot->ports[port];
unsigned char addr[ETH_ALEN];
struct ocelot_multicast *mc;
+ struct ocelot_pgid *pgid;
u16 vid = mdb->vid;
if (port == ocelot->npi)
@@ -1081,6 +1127,7 @@ int ocelot_port_mdb_del(struct ocelot *ocelot, int port,
ocelot_encode_ports_to_mdb(addr, mc);
ocelot_mact_forget(ocelot, addr, vid);
+ ocelot_pgid_free(ocelot, mc->pgid);
mc->ports &= ~BIT(port);
if (!mc->ports) {
list_del(&mc->list);
@@ -1088,9 +1135,20 @@ int ocelot_port_mdb_del(struct ocelot *ocelot, int port,
return 0;
}
+ /* We have a PGID with fewer ports now */
+ pgid = ocelot_mdb_get_pgid(ocelot, mc);
+ if (IS_ERR(pgid))
+ return PTR_ERR(pgid);
+ mc->pgid = pgid;
+
ocelot_encode_ports_to_mdb(addr, mc);
- return ocelot_mact_learn(ocelot, mc->pgid, addr, vid,
+ if (mc->entry_type != ENTRYTYPE_MACv4 &&
+ mc->entry_type != ENTRYTYPE_MACv6)
+ ocelot_write_rix(ocelot, pgid->ports, ANA_PGID_PGID,
+ pgid->index);
+
+ return ocelot_mact_learn(ocelot, pgid->index, addr, vid,
mc->entry_type);
}
EXPORT_SYMBOL(ocelot_port_mdb_del);
@@ -1449,6 +1507,7 @@ int ocelot_init(struct ocelot *ocelot)
return -ENOMEM;
INIT_LIST_HEAD(&ocelot->multicast);
+ INIT_LIST_HEAD(&ocelot->pgids);
ocelot_mact_init(ocelot);
ocelot_vlan_init(ocelot);
ocelot_vcap_init(ocelot);
diff --git a/drivers/net/ethernet/mscc/ocelot.h b/drivers/net/ethernet/mscc/ocelot.h
index 7f8b34c49971..291d39d49c4e 100644
--- a/drivers/net/ethernet/mscc/ocelot.h
+++ b/drivers/net/ethernet/mscc/ocelot.h
@@ -79,13 +79,27 @@ enum macaccess_entry_type {
ENTRYTYPE_MACv6,
};
+/* A (PGID) port mask structure, encoding the 2^ocelot->num_phys_ports
+ * possibilities of egress port masks for L2 multicast traffic.
+ * For a switch with 9 user ports, there are 512 possible port masks, but the
+ * hardware only has 46 individual PGIDs that it can forward multicast traffic
+ * to. So we need a structure that maps the limited PGID indices to the port
+ * destinations requested by the user for L2 multicast.
+ */
+struct ocelot_pgid {
+ unsigned long ports;
+ int index;
+ refcount_t refcount;
+ struct list_head list;
+};
+
struct ocelot_multicast {
struct list_head list;
enum macaccess_entry_type entry_type;
unsigned char addr[ETH_ALEN];
u16 vid;
u16 ports;
- int pgid;
+ struct ocelot_pgid *pgid;
};
int ocelot_port_fdb_do_dump(const unsigned char *addr, u16 vid,
diff --git a/include/soc/mscc/ocelot.h b/include/soc/mscc/ocelot.h
index 1e9db9577441..cc126d1796be 100644
--- a/include/soc/mscc/ocelot.h
+++ b/include/soc/mscc/ocelot.h
@@ -632,6 +632,7 @@ struct ocelot {
u32 *lags;
struct list_head multicast;
+ struct list_head pgids;
struct list_head dummy_rules;
struct ocelot_vcap_block block[3];
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 17:41:19 +0000