533 lines
13 KiB
C
533 lines
13 KiB
C
// 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 = dsa_to_port(ds, 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;
|
|
|
|
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;
|
|
|
|
/* 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 bool dsa_switch_mtu_match(struct dsa_switch *ds, int port,
|
|
struct dsa_notifier_mtu_info *info)
|
|
{
|
|
if (ds->index == info->sw_index)
|
|
return (port == info->port) || dsa_is_dsa_port(ds, port);
|
|
|
|
if (!info->propagate_upstream)
|
|
return false;
|
|
|
|
if (dsa_is_dsa_port(ds, port) || dsa_is_cpu_port(ds, port))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static int dsa_switch_mtu(struct dsa_switch *ds,
|
|
struct dsa_notifier_mtu_info *info)
|
|
{
|
|
int port, ret;
|
|
|
|
if (!ds->ops->port_change_mtu)
|
|
return -EOPNOTSUPP;
|
|
|
|
for (port = 0; port < ds->num_ports; port++) {
|
|
if (dsa_switch_mtu_match(ds, port, info)) {
|
|
ret = ds->ops->port_change_mtu(ds, port, info->mtu);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dsa_switch_bridge_join(struct dsa_switch *ds,
|
|
struct dsa_notifier_bridge_info *info)
|
|
{
|
|
struct dsa_switch_tree *dst = ds->dst;
|
|
|
|
if (dst->index == info->tree_index && ds->index == info->sw_index &&
|
|
ds->ops->port_bridge_join)
|
|
return ds->ops->port_bridge_join(ds, info->port, info->br);
|
|
|
|
if ((dst->index != info->tree_index || ds->index != info->sw_index) &&
|
|
ds->ops->crosschip_bridge_join)
|
|
return ds->ops->crosschip_bridge_join(ds, info->tree_index,
|
|
info->sw_index,
|
|
info->port, info->br);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dsa_switch_bridge_leave(struct dsa_switch *ds,
|
|
struct dsa_notifier_bridge_info *info)
|
|
{
|
|
bool unset_vlan_filtering = br_vlan_enabled(info->br);
|
|
struct dsa_switch_tree *dst = ds->dst;
|
|
struct netlink_ext_ack extack = {0};
|
|
int err, port;
|
|
|
|
if (dst->index == info->tree_index && ds->index == info->sw_index &&
|
|
ds->ops->port_bridge_join)
|
|
ds->ops->port_bridge_leave(ds, info->port, info->br);
|
|
|
|
if ((dst->index != info->tree_index || ds->index != info->sw_index) &&
|
|
ds->ops->crosschip_bridge_join)
|
|
ds->ops->crosschip_bridge_leave(ds, info->tree_index,
|
|
info->sw_index, info->port,
|
|
info->br);
|
|
|
|
/* 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 leaves the last
|
|
* VLAN-aware bridge.
|
|
*/
|
|
if (unset_vlan_filtering && ds->vlan_filtering_is_global) {
|
|
for (port = 0; port < ds->num_ports; port++) {
|
|
struct net_device *bridge_dev;
|
|
|
|
bridge_dev = dsa_to_port(ds, port)->bridge_dev;
|
|
|
|
if (bridge_dev && br_vlan_enabled(bridge_dev)) {
|
|
unset_vlan_filtering = false;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (unset_vlan_filtering) {
|
|
err = dsa_port_vlan_filtering(dsa_to_port(ds, info->port),
|
|
false, &extack);
|
|
if (extack._msg)
|
|
dev_err(ds->dev, "port %d: %s\n", info->port,
|
|
extack._msg);
|
|
if (err && err != EOPNOTSUPP)
|
|
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 int dsa_switch_hsr_join(struct dsa_switch *ds,
|
|
struct dsa_notifier_hsr_info *info)
|
|
{
|
|
if (ds->index == info->sw_index && ds->ops->port_hsr_join)
|
|
return ds->ops->port_hsr_join(ds, info->port, info->hsr);
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int dsa_switch_hsr_leave(struct dsa_switch *ds,
|
|
struct dsa_notifier_hsr_info *info)
|
|
{
|
|
if (ds->index == info->sw_index && ds->ops->port_hsr_leave)
|
|
return ds->ops->port_hsr_leave(ds, info->port, info->hsr);
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int dsa_switch_lag_change(struct dsa_switch *ds,
|
|
struct dsa_notifier_lag_info *info)
|
|
{
|
|
if (ds->index == info->sw_index && ds->ops->port_lag_change)
|
|
return ds->ops->port_lag_change(ds, info->port);
|
|
|
|
if (ds->index != info->sw_index && ds->ops->crosschip_lag_change)
|
|
return ds->ops->crosschip_lag_change(ds, info->sw_index,
|
|
info->port);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dsa_switch_lag_join(struct dsa_switch *ds,
|
|
struct dsa_notifier_lag_info *info)
|
|
{
|
|
if (ds->index == info->sw_index && ds->ops->port_lag_join)
|
|
return ds->ops->port_lag_join(ds, info->port, info->lag,
|
|
info->info);
|
|
|
|
if (ds->index != info->sw_index && ds->ops->crosschip_lag_join)
|
|
return ds->ops->crosschip_lag_join(ds, info->sw_index,
|
|
info->port, info->lag,
|
|
info->info);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dsa_switch_lag_leave(struct dsa_switch *ds,
|
|
struct dsa_notifier_lag_info *info)
|
|
{
|
|
if (ds->index == info->sw_index && ds->ops->port_lag_leave)
|
|
return ds->ops->port_lag_leave(ds, info->port, info->lag);
|
|
|
|
if (ds->index != info->sw_index && ds->ops->crosschip_lag_leave)
|
|
return ds->ops->crosschip_lag_leave(ds, info->sw_index,
|
|
info->port, info->lag);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dsa_switch_mdb_add(struct dsa_switch *ds,
|
|
struct dsa_notifier_mdb_info *info)
|
|
{
|
|
int port = dsa_towards_port(ds, info->sw_index, info->port);
|
|
|
|
if (!ds->ops->port_mdb_add)
|
|
return -EOPNOTSUPP;
|
|
|
|
return ds->ops->port_mdb_add(ds, port, info->mdb);
|
|
}
|
|
|
|
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 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_add(struct dsa_switch *ds,
|
|
struct dsa_notifier_vlan_info *info)
|
|
{
|
|
int port, err;
|
|
|
|
if (!ds->ops->port_vlan_add)
|
|
return -EOPNOTSUPP;
|
|
|
|
for (port = 0; port < ds->num_ports; port++) {
|
|
if (dsa_switch_vlan_match(ds, port, info)) {
|
|
err = ds->ops->port_vlan_add(ds, port, info->vlan,
|
|
info->extack);
|
|
if (err)
|
|
return err;
|
|
}
|
|
}
|
|
|
|
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_change_tag_proto(struct dsa_switch *ds,
|
|
struct dsa_notifier_tag_proto_info *info)
|
|
{
|
|
const struct dsa_device_ops *tag_ops = info->tag_ops;
|
|
int port, err;
|
|
|
|
if (!ds->ops->change_tag_protocol)
|
|
return -EOPNOTSUPP;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
for (port = 0; port < ds->num_ports; port++) {
|
|
if (!dsa_is_cpu_port(ds, port))
|
|
continue;
|
|
|
|
err = ds->ops->change_tag_protocol(ds, port, tag_ops->proto);
|
|
if (err)
|
|
return err;
|
|
|
|
dsa_port_set_tag_protocol(dsa_to_port(ds, port), tag_ops);
|
|
}
|
|
|
|
/* Now that changing the tag protocol can no longer fail, let's update
|
|
* the remaining bits which are "duplicated for faster access", and the
|
|
* bits that depend on the tagger, such as the MTU.
|
|
*/
|
|
for (port = 0; port < ds->num_ports; port++) {
|
|
if (dsa_is_user_port(ds, port)) {
|
|
struct net_device *slave;
|
|
|
|
slave = dsa_to_port(ds, port)->slave;
|
|
dsa_slave_setup_tagger(slave);
|
|
|
|
/* rtnl_mutex is held in dsa_tree_change_tag_proto */
|
|
dsa_slave_change_mtu(slave, slave->mtu);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool dsa_switch_mrp_match(struct dsa_switch *ds, int port,
|
|
struct dsa_notifier_mrp_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_mrp_add(struct dsa_switch *ds,
|
|
struct dsa_notifier_mrp_info *info)
|
|
{
|
|
int err = 0;
|
|
int port;
|
|
|
|
if (!ds->ops->port_mrp_add)
|
|
return -EOPNOTSUPP;
|
|
|
|
for (port = 0; port < ds->num_ports; port++) {
|
|
if (dsa_switch_mrp_match(ds, port, info)) {
|
|
err = ds->ops->port_mrp_add(ds, port, info->mrp);
|
|
if (err)
|
|
break;
|
|
}
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int dsa_switch_mrp_del(struct dsa_switch *ds,
|
|
struct dsa_notifier_mrp_info *info)
|
|
{
|
|
if (!ds->ops->port_mrp_del)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (ds->index == info->sw_index)
|
|
return ds->ops->port_mrp_del(ds, info->port, info->mrp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool
|
|
dsa_switch_mrp_ring_role_match(struct dsa_switch *ds, int port,
|
|
struct dsa_notifier_mrp_ring_role_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_mrp_add_ring_role(struct dsa_switch *ds,
|
|
struct dsa_notifier_mrp_ring_role_info *info)
|
|
{
|
|
int err = 0;
|
|
int port;
|
|
|
|
if (!ds->ops->port_mrp_add)
|
|
return -EOPNOTSUPP;
|
|
|
|
for (port = 0; port < ds->num_ports; port++) {
|
|
if (dsa_switch_mrp_ring_role_match(ds, port, info)) {
|
|
err = ds->ops->port_mrp_add_ring_role(ds, port,
|
|
info->mrp);
|
|
if (err)
|
|
break;
|
|
}
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
dsa_switch_mrp_del_ring_role(struct dsa_switch *ds,
|
|
struct dsa_notifier_mrp_ring_role_info *info)
|
|
{
|
|
if (!ds->ops->port_mrp_del)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (ds->index == info->sw_index)
|
|
return ds->ops->port_mrp_del_ring_role(ds, info->port,
|
|
info->mrp);
|
|
|
|
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_HSR_JOIN:
|
|
err = dsa_switch_hsr_join(ds, info);
|
|
break;
|
|
case DSA_NOTIFIER_HSR_LEAVE:
|
|
err = dsa_switch_hsr_leave(ds, info);
|
|
break;
|
|
case DSA_NOTIFIER_LAG_CHANGE:
|
|
err = dsa_switch_lag_change(ds, info);
|
|
break;
|
|
case DSA_NOTIFIER_LAG_JOIN:
|
|
err = dsa_switch_lag_join(ds, info);
|
|
break;
|
|
case DSA_NOTIFIER_LAG_LEAVE:
|
|
err = dsa_switch_lag_leave(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;
|
|
case DSA_NOTIFIER_MTU:
|
|
err = dsa_switch_mtu(ds, info);
|
|
break;
|
|
case DSA_NOTIFIER_TAG_PROTO:
|
|
err = dsa_switch_change_tag_proto(ds, info);
|
|
break;
|
|
case DSA_NOTIFIER_MRP_ADD:
|
|
err = dsa_switch_mrp_add(ds, info);
|
|
break;
|
|
case DSA_NOTIFIER_MRP_DEL:
|
|
err = dsa_switch_mrp_del(ds, info);
|
|
break;
|
|
case DSA_NOTIFIER_MRP_ADD_RING_ROLE:
|
|
err = dsa_switch_mrp_add_ring_role(ds, info);
|
|
break;
|
|
case DSA_NOTIFIER_MRP_DEL_RING_ROLE:
|
|
err = dsa_switch_mrp_del_ring_role(ds, info);
|
|
break;
|
|
default:
|
|
err = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
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);
|
|
}
|