ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/net/dsa/switch.c b/marvell/linux/net/dsa/switch.c
new file mode 100644
index 0000000..f517d6d
--- /dev/null
+++ b/marvell/linux/net/dsa/switch.c
@@ -0,0 +1,376 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Handling of a single switch chip, part of a switch fabric
+ *
+ * Copyright (c) 2017 Savoir-faire Linux Inc.
+ * Vivien Didelot <vivien.didelot@savoirfairelinux.com>
+ */
+
+#include <linux/if_bridge.h>
+#include <linux/netdevice.h>
+#include <linux/notifier.h>
+#include <linux/if_vlan.h>
+#include <net/switchdev.h>
+
+#include "dsa_priv.h"
+
+static unsigned int dsa_switch_fastest_ageing_time(struct dsa_switch *ds,
+ unsigned int ageing_time)
+{
+ int i;
+
+ for (i = 0; i < ds->num_ports; ++i) {
+ struct dsa_port *dp = &ds->ports[i];
+
+ if (dp->ageing_time && dp->ageing_time < ageing_time)
+ ageing_time = dp->ageing_time;
+ }
+
+ return ageing_time;
+}
+
+static int dsa_switch_ageing_time(struct dsa_switch *ds,
+ struct dsa_notifier_ageing_time_info *info)
+{
+ unsigned int ageing_time = info->ageing_time;
+ struct switchdev_trans *trans = info->trans;
+
+ if (switchdev_trans_ph_prepare(trans)) {
+ if (ds->ageing_time_min && ageing_time < ds->ageing_time_min)
+ return -ERANGE;
+ if (ds->ageing_time_max && ageing_time > ds->ageing_time_max)
+ return -ERANGE;
+ return 0;
+ }
+
+ /* Program the fastest ageing time in case of multiple bridges */
+ ageing_time = dsa_switch_fastest_ageing_time(ds, ageing_time);
+
+ if (ds->ops->set_ageing_time)
+ return ds->ops->set_ageing_time(ds, ageing_time);
+
+ return 0;
+}
+
+static int dsa_switch_bridge_join(struct dsa_switch *ds,
+ struct dsa_notifier_bridge_info *info)
+{
+ if (ds->index == info->sw_index && ds->ops->port_bridge_join)
+ return ds->ops->port_bridge_join(ds, info->port, info->br);
+
+ if (ds->index != info->sw_index && ds->ops->crosschip_bridge_join)
+ return ds->ops->crosschip_bridge_join(ds, info->sw_index,
+ info->port, info->br);
+
+ return 0;
+}
+
+static int dsa_switch_sync_vlan_filtering(struct dsa_switch *ds,
+ struct dsa_notifier_bridge_info *info)
+{
+ bool unset_vlan_filtering = br_vlan_enabled(info->br);
+ int err, i;
+
+ /* If the bridge was vlan_filtering, the bridge core doesn't trigger an
+ * event for changing vlan_filtering setting upon slave ports leaving
+ * it. That is a good thing, because that lets us handle it and also
+ * handle the case where the switch's vlan_filtering setting is global
+ * (not per port). When that happens, the correct moment to trigger the
+ * vlan_filtering callback is only when the last port left this bridge.
+ */
+ if (unset_vlan_filtering && ds->vlan_filtering_is_global) {
+ for (i = 0; i < ds->num_ports; i++) {
+ if (i == info->port)
+ continue;
+ if (dsa_to_port(ds, i)->bridge_dev == info->br) {
+ unset_vlan_filtering = false;
+ break;
+ }
+ }
+ }
+ if (unset_vlan_filtering) {
+ struct switchdev_trans trans = {0};
+
+ err = dsa_port_vlan_filtering(&ds->ports[info->port],
+ false, &trans);
+ if (err && err != EOPNOTSUPP)
+ return err;
+ }
+
+ return 0;
+}
+
+static int dsa_switch_bridge_leave(struct dsa_switch *ds,
+ struct dsa_notifier_bridge_info *info)
+{
+ int err;
+
+ if (ds->index == info->sw_index && ds->ops->port_bridge_leave)
+ ds->ops->port_bridge_leave(ds, info->port, info->br);
+
+ if (ds->index != info->sw_index && ds->ops->crosschip_bridge_leave)
+ ds->ops->crosschip_bridge_leave(ds, info->sw_index, info->port,
+ info->br);
+
+ if (ds->index == info->sw_index) {
+ err = dsa_switch_sync_vlan_filtering(ds, info);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int dsa_switch_fdb_add(struct dsa_switch *ds,
+ struct dsa_notifier_fdb_info *info)
+{
+ int port = dsa_towards_port(ds, info->sw_index, info->port);
+
+ if (!ds->ops->port_fdb_add)
+ return -EOPNOTSUPP;
+
+ return ds->ops->port_fdb_add(ds, port, info->addr, info->vid);
+}
+
+static int dsa_switch_fdb_del(struct dsa_switch *ds,
+ struct dsa_notifier_fdb_info *info)
+{
+ int port = dsa_towards_port(ds, info->sw_index, info->port);
+
+ if (!ds->ops->port_fdb_del)
+ return -EOPNOTSUPP;
+
+ return ds->ops->port_fdb_del(ds, port, info->addr, info->vid);
+}
+
+static bool dsa_switch_mdb_match(struct dsa_switch *ds, int port,
+ struct dsa_notifier_mdb_info *info)
+{
+ if (ds->index == info->sw_index && port == info->port)
+ return true;
+
+ if (dsa_is_dsa_port(ds, port))
+ return true;
+
+ return false;
+}
+
+static int dsa_switch_mdb_prepare(struct dsa_switch *ds,
+ struct dsa_notifier_mdb_info *info)
+{
+ int port, err;
+
+ if (!ds->ops->port_mdb_prepare || !ds->ops->port_mdb_add)
+ return -EOPNOTSUPP;
+
+ for (port = 0; port < ds->num_ports; port++) {
+ if (dsa_switch_mdb_match(ds, port, info)) {
+ err = ds->ops->port_mdb_prepare(ds, port, info->mdb);
+ if (err)
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+static int dsa_switch_mdb_add(struct dsa_switch *ds,
+ struct dsa_notifier_mdb_info *info)
+{
+ int port;
+
+ if (switchdev_trans_ph_prepare(info->trans))
+ return dsa_switch_mdb_prepare(ds, info);
+
+ if (!ds->ops->port_mdb_add)
+ return 0;
+
+ for (port = 0; port < ds->num_ports; port++)
+ if (dsa_switch_mdb_match(ds, port, info))
+ ds->ops->port_mdb_add(ds, port, info->mdb);
+
+ return 0;
+}
+
+static int dsa_switch_mdb_del(struct dsa_switch *ds,
+ struct dsa_notifier_mdb_info *info)
+{
+ if (!ds->ops->port_mdb_del)
+ return -EOPNOTSUPP;
+
+ if (ds->index == info->sw_index)
+ return ds->ops->port_mdb_del(ds, info->port, info->mdb);
+
+ return 0;
+}
+
+static int dsa_port_vlan_device_check(struct net_device *vlan_dev,
+ int vlan_dev_vid,
+ void *arg)
+{
+ struct switchdev_obj_port_vlan *vlan = arg;
+ u16 vid;
+
+ for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
+ if (vid == vlan_dev_vid)
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+static int dsa_port_vlan_check(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_vlan *vlan)
+{
+ const struct dsa_port *dp = dsa_to_port(ds, port);
+ int err = 0;
+
+ /* Device is not bridged, let it proceed with the VLAN device
+ * creation.
+ */
+ if (!dp->bridge_dev)
+ return err;
+
+ /* dsa_slave_vlan_rx_{add,kill}_vid() cannot use the prepare phase and
+ * already checks whether there is an overlapping bridge VLAN entry
+ * with the same VID, so here we only need to check that if we are
+ * adding a bridge VLAN entry there is not an overlapping VLAN device
+ * claiming that VID.
+ */
+ return vlan_for_each(dp->slave, dsa_port_vlan_device_check,
+ (void *)vlan);
+}
+
+static bool dsa_switch_vlan_match(struct dsa_switch *ds, int port,
+ struct dsa_notifier_vlan_info *info)
+{
+ if (ds->index == info->sw_index && port == info->port)
+ return true;
+
+ if (dsa_is_dsa_port(ds, port))
+ return true;
+
+ return false;
+}
+
+static int dsa_switch_vlan_prepare(struct dsa_switch *ds,
+ struct dsa_notifier_vlan_info *info)
+{
+ int port, err;
+
+ if (!ds->ops->port_vlan_prepare || !ds->ops->port_vlan_add)
+ return -EOPNOTSUPP;
+
+ for (port = 0; port < ds->num_ports; port++) {
+ if (dsa_switch_vlan_match(ds, port, info)) {
+ err = dsa_port_vlan_check(ds, port, info->vlan);
+ if (err)
+ return err;
+
+ err = ds->ops->port_vlan_prepare(ds, port, info->vlan);
+ if (err)
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+static int dsa_switch_vlan_add(struct dsa_switch *ds,
+ struct dsa_notifier_vlan_info *info)
+{
+ int port;
+
+ if (switchdev_trans_ph_prepare(info->trans))
+ return dsa_switch_vlan_prepare(ds, info);
+
+ if (!ds->ops->port_vlan_add)
+ return 0;
+
+ for (port = 0; port < ds->num_ports; port++)
+ if (dsa_switch_vlan_match(ds, port, info))
+ ds->ops->port_vlan_add(ds, port, info->vlan);
+
+ return 0;
+}
+
+static int dsa_switch_vlan_del(struct dsa_switch *ds,
+ struct dsa_notifier_vlan_info *info)
+{
+ if (!ds->ops->port_vlan_del)
+ return -EOPNOTSUPP;
+
+ if (ds->index == info->sw_index)
+ return ds->ops->port_vlan_del(ds, info->port, info->vlan);
+
+ /* Do not deprogram the DSA links as they may be used as conduit
+ * for other VLAN members in the fabric.
+ */
+ return 0;
+}
+
+static int dsa_switch_event(struct notifier_block *nb,
+ unsigned long event, void *info)
+{
+ struct dsa_switch *ds = container_of(nb, struct dsa_switch, nb);
+ int err;
+
+ switch (event) {
+ case DSA_NOTIFIER_AGEING_TIME:
+ err = dsa_switch_ageing_time(ds, info);
+ break;
+ case DSA_NOTIFIER_BRIDGE_JOIN:
+ err = dsa_switch_bridge_join(ds, info);
+ break;
+ case DSA_NOTIFIER_BRIDGE_LEAVE:
+ err = dsa_switch_bridge_leave(ds, info);
+ break;
+ case DSA_NOTIFIER_FDB_ADD:
+ err = dsa_switch_fdb_add(ds, info);
+ break;
+ case DSA_NOTIFIER_FDB_DEL:
+ err = dsa_switch_fdb_del(ds, info);
+ break;
+ case DSA_NOTIFIER_MDB_ADD:
+ err = dsa_switch_mdb_add(ds, info);
+ break;
+ case DSA_NOTIFIER_MDB_DEL:
+ err = dsa_switch_mdb_del(ds, info);
+ break;
+ case DSA_NOTIFIER_VLAN_ADD:
+ err = dsa_switch_vlan_add(ds, info);
+ break;
+ case DSA_NOTIFIER_VLAN_DEL:
+ err = dsa_switch_vlan_del(ds, info);
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ break;
+ }
+
+ /* Non-switchdev operations cannot be rolled back. If a DSA driver
+ * returns an error during the chained call, switch chips may be in an
+ * inconsistent state.
+ */
+ if (err)
+ dev_dbg(ds->dev, "breaking chain for DSA event %lu (%d)\n",
+ event, err);
+
+ return notifier_from_errno(err);
+}
+
+int dsa_switch_register_notifier(struct dsa_switch *ds)
+{
+ ds->nb.notifier_call = dsa_switch_event;
+
+ return raw_notifier_chain_register(&ds->dst->nh, &ds->nb);
+}
+
+void dsa_switch_unregister_notifier(struct dsa_switch *ds)
+{
+ int err;
+
+ err = raw_notifier_chain_unregister(&ds->dst->nh, &ds->nb);
+ if (err)
+ dev_err(ds->dev, "failed to unregister notifier (%d)\n", err);
+}