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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /net/dsa/slave.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'net/dsa/slave.c')
-rw-r--r--net/dsa/slave.c3491
1 files changed, 3491 insertions, 0 deletions
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
new file mode 100644
index 000000000..5fe075bf4
--- /dev/null
+++ b/net/dsa/slave.c
@@ -0,0 +1,3491 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * net/dsa/slave.c - Slave device handling
+ * Copyright (c) 2008-2009 Marvell Semiconductor
+ */
+
+#include <linux/list.h>
+#include <linux/etherdevice.h>
+#include <linux/netdevice.h>
+#include <linux/phy.h>
+#include <linux/phy_fixed.h>
+#include <linux/phylink.h>
+#include <linux/of_net.h>
+#include <linux/of_mdio.h>
+#include <linux/mdio.h>
+#include <net/rtnetlink.h>
+#include <net/pkt_cls.h>
+#include <net/selftests.h>
+#include <net/tc_act/tc_mirred.h>
+#include <linux/if_bridge.h>
+#include <linux/if_hsr.h>
+#include <net/dcbnl.h>
+#include <linux/netpoll.h>
+
+#include "dsa_priv.h"
+
+static void dsa_slave_standalone_event_work(struct work_struct *work)
+{
+ struct dsa_standalone_event_work *standalone_work =
+ container_of(work, struct dsa_standalone_event_work, work);
+ const unsigned char *addr = standalone_work->addr;
+ struct net_device *dev = standalone_work->dev;
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct switchdev_obj_port_mdb mdb;
+ struct dsa_switch *ds = dp->ds;
+ u16 vid = standalone_work->vid;
+ int err;
+
+ switch (standalone_work->event) {
+ case DSA_UC_ADD:
+ err = dsa_port_standalone_host_fdb_add(dp, addr, vid);
+ if (err) {
+ dev_err(ds->dev,
+ "port %d failed to add %pM vid %d to fdb: %d\n",
+ dp->index, addr, vid, err);
+ break;
+ }
+ break;
+
+ case DSA_UC_DEL:
+ err = dsa_port_standalone_host_fdb_del(dp, addr, vid);
+ if (err) {
+ dev_err(ds->dev,
+ "port %d failed to delete %pM vid %d from fdb: %d\n",
+ dp->index, addr, vid, err);
+ }
+
+ break;
+ case DSA_MC_ADD:
+ ether_addr_copy(mdb.addr, addr);
+ mdb.vid = vid;
+
+ err = dsa_port_standalone_host_mdb_add(dp, &mdb);
+ if (err) {
+ dev_err(ds->dev,
+ "port %d failed to add %pM vid %d to mdb: %d\n",
+ dp->index, addr, vid, err);
+ break;
+ }
+ break;
+ case DSA_MC_DEL:
+ ether_addr_copy(mdb.addr, addr);
+ mdb.vid = vid;
+
+ err = dsa_port_standalone_host_mdb_del(dp, &mdb);
+ if (err) {
+ dev_err(ds->dev,
+ "port %d failed to delete %pM vid %d from mdb: %d\n",
+ dp->index, addr, vid, err);
+ }
+
+ break;
+ }
+
+ kfree(standalone_work);
+}
+
+static int dsa_slave_schedule_standalone_work(struct net_device *dev,
+ enum dsa_standalone_event event,
+ const unsigned char *addr,
+ u16 vid)
+{
+ struct dsa_standalone_event_work *standalone_work;
+
+ standalone_work = kzalloc(sizeof(*standalone_work), GFP_ATOMIC);
+ if (!standalone_work)
+ return -ENOMEM;
+
+ INIT_WORK(&standalone_work->work, dsa_slave_standalone_event_work);
+ standalone_work->event = event;
+ standalone_work->dev = dev;
+
+ ether_addr_copy(standalone_work->addr, addr);
+ standalone_work->vid = vid;
+
+ dsa_schedule_work(&standalone_work->work);
+
+ return 0;
+}
+
+static int dsa_slave_sync_uc(struct net_device *dev,
+ const unsigned char *addr)
+{
+ struct net_device *master = dsa_slave_to_master(dev);
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+
+ dev_uc_add(master, addr);
+
+ if (!dsa_switch_supports_uc_filtering(dp->ds))
+ return 0;
+
+ return dsa_slave_schedule_standalone_work(dev, DSA_UC_ADD, addr, 0);
+}
+
+static int dsa_slave_unsync_uc(struct net_device *dev,
+ const unsigned char *addr)
+{
+ struct net_device *master = dsa_slave_to_master(dev);
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+
+ dev_uc_del(master, addr);
+
+ if (!dsa_switch_supports_uc_filtering(dp->ds))
+ return 0;
+
+ return dsa_slave_schedule_standalone_work(dev, DSA_UC_DEL, addr, 0);
+}
+
+static int dsa_slave_sync_mc(struct net_device *dev,
+ const unsigned char *addr)
+{
+ struct net_device *master = dsa_slave_to_master(dev);
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+
+ dev_mc_add(master, addr);
+
+ if (!dsa_switch_supports_mc_filtering(dp->ds))
+ return 0;
+
+ return dsa_slave_schedule_standalone_work(dev, DSA_MC_ADD, addr, 0);
+}
+
+static int dsa_slave_unsync_mc(struct net_device *dev,
+ const unsigned char *addr)
+{
+ struct net_device *master = dsa_slave_to_master(dev);
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+
+ dev_mc_del(master, addr);
+
+ if (!dsa_switch_supports_mc_filtering(dp->ds))
+ return 0;
+
+ return dsa_slave_schedule_standalone_work(dev, DSA_MC_DEL, addr, 0);
+}
+
+void dsa_slave_sync_ha(struct net_device *dev)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+ struct netdev_hw_addr *ha;
+
+ netif_addr_lock_bh(dev);
+
+ netdev_for_each_synced_mc_addr(ha, dev)
+ dsa_slave_sync_mc(dev, ha->addr);
+
+ netdev_for_each_synced_uc_addr(ha, dev)
+ dsa_slave_sync_uc(dev, ha->addr);
+
+ netif_addr_unlock_bh(dev);
+
+ if (dsa_switch_supports_uc_filtering(ds) ||
+ dsa_switch_supports_mc_filtering(ds))
+ dsa_flush_workqueue();
+}
+
+void dsa_slave_unsync_ha(struct net_device *dev)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+ struct netdev_hw_addr *ha;
+
+ netif_addr_lock_bh(dev);
+
+ netdev_for_each_synced_uc_addr(ha, dev)
+ dsa_slave_unsync_uc(dev, ha->addr);
+
+ netdev_for_each_synced_mc_addr(ha, dev)
+ dsa_slave_unsync_mc(dev, ha->addr);
+
+ netif_addr_unlock_bh(dev);
+
+ if (dsa_switch_supports_uc_filtering(ds) ||
+ dsa_switch_supports_mc_filtering(ds))
+ dsa_flush_workqueue();
+}
+
+/* slave mii_bus handling ***************************************************/
+static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
+{
+ struct dsa_switch *ds = bus->priv;
+
+ if (ds->phys_mii_mask & (1 << addr))
+ return ds->ops->phy_read(ds, addr, reg);
+
+ return 0xffff;
+}
+
+static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
+{
+ struct dsa_switch *ds = bus->priv;
+
+ if (ds->phys_mii_mask & (1 << addr))
+ return ds->ops->phy_write(ds, addr, reg, val);
+
+ return 0;
+}
+
+void dsa_slave_mii_bus_init(struct dsa_switch *ds)
+{
+ ds->slave_mii_bus->priv = (void *)ds;
+ ds->slave_mii_bus->name = "dsa slave smi";
+ ds->slave_mii_bus->read = dsa_slave_phy_read;
+ ds->slave_mii_bus->write = dsa_slave_phy_write;
+ snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
+ ds->dst->index, ds->index);
+ ds->slave_mii_bus->parent = ds->dev;
+ ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
+}
+
+
+/* slave device handling ****************************************************/
+static int dsa_slave_get_iflink(const struct net_device *dev)
+{
+ return dsa_slave_to_master(dev)->ifindex;
+}
+
+static int dsa_slave_open(struct net_device *dev)
+{
+ struct net_device *master = dsa_slave_to_master(dev);
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+ int err;
+
+ err = dev_open(master, NULL);
+ if (err < 0) {
+ netdev_err(dev, "failed to open master %s\n", master->name);
+ goto out;
+ }
+
+ if (dsa_switch_supports_uc_filtering(ds)) {
+ err = dsa_port_standalone_host_fdb_add(dp, dev->dev_addr, 0);
+ if (err)
+ goto out;
+ }
+
+ if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
+ err = dev_uc_add(master, dev->dev_addr);
+ if (err < 0)
+ goto del_host_addr;
+ }
+
+ err = dsa_port_enable_rt(dp, dev->phydev);
+ if (err)
+ goto del_unicast;
+
+ return 0;
+
+del_unicast:
+ if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
+ dev_uc_del(master, dev->dev_addr);
+del_host_addr:
+ if (dsa_switch_supports_uc_filtering(ds))
+ dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0);
+out:
+ return err;
+}
+
+static int dsa_slave_close(struct net_device *dev)
+{
+ struct net_device *master = dsa_slave_to_master(dev);
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ dsa_port_disable_rt(dp);
+
+ if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
+ dev_uc_del(master, dev->dev_addr);
+
+ if (dsa_switch_supports_uc_filtering(ds))
+ dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0);
+
+ return 0;
+}
+
+static void dsa_slave_manage_host_flood(struct net_device *dev)
+{
+ bool mc = dev->flags & (IFF_PROMISC | IFF_ALLMULTI);
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ bool uc = dev->flags & IFF_PROMISC;
+
+ dsa_port_set_host_flood(dp, uc, mc);
+}
+
+static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
+{
+ struct net_device *master = dsa_slave_to_master(dev);
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (change & IFF_ALLMULTI)
+ dev_set_allmulti(master,
+ dev->flags & IFF_ALLMULTI ? 1 : -1);
+ if (change & IFF_PROMISC)
+ dev_set_promiscuity(master,
+ dev->flags & IFF_PROMISC ? 1 : -1);
+
+ if (dsa_switch_supports_uc_filtering(ds) &&
+ dsa_switch_supports_mc_filtering(ds))
+ dsa_slave_manage_host_flood(dev);
+}
+
+static void dsa_slave_set_rx_mode(struct net_device *dev)
+{
+ __dev_mc_sync(dev, dsa_slave_sync_mc, dsa_slave_unsync_mc);
+ __dev_uc_sync(dev, dsa_slave_sync_uc, dsa_slave_unsync_uc);
+}
+
+static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
+{
+ struct net_device *master = dsa_slave_to_master(dev);
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+ struct sockaddr *addr = a;
+ int err;
+
+ if (!is_valid_ether_addr(addr->sa_data))
+ return -EADDRNOTAVAIL;
+
+ /* If the port is down, the address isn't synced yet to hardware or
+ * to the DSA master, so there is nothing to change.
+ */
+ if (!(dev->flags & IFF_UP))
+ goto out_change_dev_addr;
+
+ if (dsa_switch_supports_uc_filtering(ds)) {
+ err = dsa_port_standalone_host_fdb_add(dp, addr->sa_data, 0);
+ if (err)
+ return err;
+ }
+
+ if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
+ err = dev_uc_add(master, addr->sa_data);
+ if (err < 0)
+ goto del_unicast;
+ }
+
+ if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
+ dev_uc_del(master, dev->dev_addr);
+
+ if (dsa_switch_supports_uc_filtering(ds))
+ dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0);
+
+out_change_dev_addr:
+ eth_hw_addr_set(dev, addr->sa_data);
+
+ return 0;
+
+del_unicast:
+ if (dsa_switch_supports_uc_filtering(ds))
+ dsa_port_standalone_host_fdb_del(dp, addr->sa_data, 0);
+
+ return err;
+}
+
+struct dsa_slave_dump_ctx {
+ struct net_device *dev;
+ struct sk_buff *skb;
+ struct netlink_callback *cb;
+ int idx;
+};
+
+static int
+dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid,
+ bool is_static, void *data)
+{
+ struct dsa_slave_dump_ctx *dump = data;
+ u32 portid = NETLINK_CB(dump->cb->skb).portid;
+ u32 seq = dump->cb->nlh->nlmsg_seq;
+ struct nlmsghdr *nlh;
+ struct ndmsg *ndm;
+
+ if (dump->idx < dump->cb->args[2])
+ goto skip;
+
+ nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
+ sizeof(*ndm), NLM_F_MULTI);
+ if (!nlh)
+ return -EMSGSIZE;
+
+ ndm = nlmsg_data(nlh);
+ ndm->ndm_family = AF_BRIDGE;
+ ndm->ndm_pad1 = 0;
+ ndm->ndm_pad2 = 0;
+ ndm->ndm_flags = NTF_SELF;
+ ndm->ndm_type = 0;
+ ndm->ndm_ifindex = dump->dev->ifindex;
+ ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
+
+ if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
+ goto nla_put_failure;
+
+ if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
+ goto nla_put_failure;
+
+ nlmsg_end(dump->skb, nlh);
+
+skip:
+ dump->idx++;
+ return 0;
+
+nla_put_failure:
+ nlmsg_cancel(dump->skb, nlh);
+ return -EMSGSIZE;
+}
+
+static int
+dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
+ struct net_device *dev, struct net_device *filter_dev,
+ int *idx)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_slave_dump_ctx dump = {
+ .dev = dev,
+ .skb = skb,
+ .cb = cb,
+ .idx = *idx,
+ };
+ int err;
+
+ err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump);
+ *idx = dump.idx;
+
+ return err;
+}
+
+static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct dsa_switch *ds = p->dp->ds;
+ int port = p->dp->index;
+
+ /* Pass through to switch driver if it supports timestamping */
+ switch (cmd) {
+ case SIOCGHWTSTAMP:
+ if (ds->ops->port_hwtstamp_get)
+ return ds->ops->port_hwtstamp_get(ds, port, ifr);
+ break;
+ case SIOCSHWTSTAMP:
+ if (ds->ops->port_hwtstamp_set)
+ return ds->ops->port_hwtstamp_set(ds, port, ifr);
+ break;
+ }
+
+ return phylink_mii_ioctl(p->dp->pl, ifr, cmd);
+}
+
+static int dsa_slave_port_attr_set(struct net_device *dev, const void *ctx,
+ const struct switchdev_attr *attr,
+ struct netlink_ext_ack *extack)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ int ret;
+
+ if (ctx && ctx != dp)
+ return 0;
+
+ switch (attr->id) {
+ case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
+ if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
+ return -EOPNOTSUPP;
+
+ ret = dsa_port_set_state(dp, attr->u.stp_state, true);
+ break;
+ case SWITCHDEV_ATTR_ID_PORT_MST_STATE:
+ if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
+ return -EOPNOTSUPP;
+
+ ret = dsa_port_set_mst_state(dp, &attr->u.mst_state, extack);
+ break;
+ case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
+ if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
+ return -EOPNOTSUPP;
+
+ ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
+ extack);
+ break;
+ case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
+ if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
+ return -EOPNOTSUPP;
+
+ ret = dsa_port_ageing_time(dp, attr->u.ageing_time);
+ break;
+ case SWITCHDEV_ATTR_ID_BRIDGE_MST:
+ if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
+ return -EOPNOTSUPP;
+
+ ret = dsa_port_mst_enable(dp, attr->u.mst, extack);
+ break;
+ case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
+ if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
+ return -EOPNOTSUPP;
+
+ ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags,
+ extack);
+ break;
+ case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
+ if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
+ return -EOPNOTSUPP;
+
+ ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack);
+ break;
+ case SWITCHDEV_ATTR_ID_VLAN_MSTI:
+ if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
+ return -EOPNOTSUPP;
+
+ ret = dsa_port_vlan_msti(dp, &attr->u.vlan_msti);
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ break;
+ }
+
+ return ret;
+}
+
+/* Must be called under rcu_read_lock() */
+static int
+dsa_slave_vlan_check_for_8021q_uppers(struct net_device *slave,
+ const struct switchdev_obj_port_vlan *vlan)
+{
+ struct net_device *upper_dev;
+ struct list_head *iter;
+
+ netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) {
+ u16 vid;
+
+ if (!is_vlan_dev(upper_dev))
+ continue;
+
+ vid = vlan_dev_vlan_id(upper_dev);
+ if (vid == vlan->vid)
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+static int dsa_slave_vlan_add(struct net_device *dev,
+ const struct switchdev_obj *obj,
+ struct netlink_ext_ack *extack)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct switchdev_obj_port_vlan *vlan;
+ int err;
+
+ if (dsa_port_skip_vlan_configuration(dp)) {
+ NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN");
+ return 0;
+ }
+
+ vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
+
+ /* Deny adding a bridge VLAN when there is already an 802.1Q upper with
+ * the same VID.
+ */
+ if (br_vlan_enabled(dsa_port_bridge_dev_get(dp))) {
+ rcu_read_lock();
+ err = dsa_slave_vlan_check_for_8021q_uppers(dev, vlan);
+ rcu_read_unlock();
+ if (err) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Port already has a VLAN upper with this VID");
+ return err;
+ }
+ }
+
+ return dsa_port_vlan_add(dp, vlan, extack);
+}
+
+/* Offload a VLAN installed on the bridge or on a foreign interface by
+ * installing it as a VLAN towards the CPU port.
+ */
+static int dsa_slave_host_vlan_add(struct net_device *dev,
+ const struct switchdev_obj *obj,
+ struct netlink_ext_ack *extack)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct switchdev_obj_port_vlan vlan;
+
+ /* Do nothing if this is a software bridge */
+ if (!dp->bridge)
+ return -EOPNOTSUPP;
+
+ if (dsa_port_skip_vlan_configuration(dp)) {
+ NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN");
+ return 0;
+ }
+
+ vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj);
+
+ /* Even though drivers often handle CPU membership in special ways,
+ * it doesn't make sense to program a PVID, so clear this flag.
+ */
+ vlan.flags &= ~BRIDGE_VLAN_INFO_PVID;
+
+ return dsa_port_host_vlan_add(dp, &vlan, extack);
+}
+
+static int dsa_slave_port_obj_add(struct net_device *dev, const void *ctx,
+ const struct switchdev_obj *obj,
+ struct netlink_ext_ack *extack)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ int err;
+
+ if (ctx && ctx != dp)
+ return 0;
+
+ switch (obj->id) {
+ case SWITCHDEV_OBJ_ID_PORT_MDB:
+ if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
+ return -EOPNOTSUPP;
+
+ err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
+ break;
+ case SWITCHDEV_OBJ_ID_HOST_MDB:
+ if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
+ return -EOPNOTSUPP;
+
+ err = dsa_port_bridge_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
+ break;
+ case SWITCHDEV_OBJ_ID_PORT_VLAN:
+ if (dsa_port_offloads_bridge_port(dp, obj->orig_dev))
+ err = dsa_slave_vlan_add(dev, obj, extack);
+ else
+ err = dsa_slave_host_vlan_add(dev, obj, extack);
+ break;
+ case SWITCHDEV_OBJ_ID_MRP:
+ if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
+ return -EOPNOTSUPP;
+
+ err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj));
+ break;
+ case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
+ if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
+ return -EOPNOTSUPP;
+
+ err = dsa_port_mrp_add_ring_role(dp,
+ SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ break;
+ }
+
+ return err;
+}
+
+static int dsa_slave_vlan_del(struct net_device *dev,
+ const struct switchdev_obj *obj)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct switchdev_obj_port_vlan *vlan;
+
+ if (dsa_port_skip_vlan_configuration(dp))
+ return 0;
+
+ vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
+
+ return dsa_port_vlan_del(dp, vlan);
+}
+
+static int dsa_slave_host_vlan_del(struct net_device *dev,
+ const struct switchdev_obj *obj)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct switchdev_obj_port_vlan *vlan;
+
+ /* Do nothing if this is a software bridge */
+ if (!dp->bridge)
+ return -EOPNOTSUPP;
+
+ if (dsa_port_skip_vlan_configuration(dp))
+ return 0;
+
+ vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
+
+ return dsa_port_host_vlan_del(dp, vlan);
+}
+
+static int dsa_slave_port_obj_del(struct net_device *dev, const void *ctx,
+ const struct switchdev_obj *obj)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ int err;
+
+ if (ctx && ctx != dp)
+ return 0;
+
+ switch (obj->id) {
+ case SWITCHDEV_OBJ_ID_PORT_MDB:
+ if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
+ return -EOPNOTSUPP;
+
+ err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
+ break;
+ case SWITCHDEV_OBJ_ID_HOST_MDB:
+ if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
+ return -EOPNOTSUPP;
+
+ err = dsa_port_bridge_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
+ break;
+ case SWITCHDEV_OBJ_ID_PORT_VLAN:
+ if (dsa_port_offloads_bridge_port(dp, obj->orig_dev))
+ err = dsa_slave_vlan_del(dev, obj);
+ else
+ err = dsa_slave_host_vlan_del(dev, obj);
+ break;
+ case SWITCHDEV_OBJ_ID_MRP:
+ if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
+ return -EOPNOTSUPP;
+
+ err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj));
+ break;
+ case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
+ if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
+ return -EOPNOTSUPP;
+
+ err = dsa_port_mrp_del_ring_role(dp,
+ SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ break;
+ }
+
+ return err;
+}
+
+static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
+ struct sk_buff *skb)
+{
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ struct dsa_slave_priv *p = netdev_priv(dev);
+
+ return netpoll_send_skb(p->netpoll, skb);
+#else
+ BUG();
+ return NETDEV_TX_OK;
+#endif
+}
+
+static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
+ struct sk_buff *skb)
+{
+ struct dsa_switch *ds = p->dp->ds;
+
+ if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))
+ return;
+
+ if (!ds->ops->port_txtstamp)
+ return;
+
+ ds->ops->port_txtstamp(ds, p->dp->index, skb);
+}
+
+netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
+{
+ /* SKB for netpoll still need to be mangled with the protocol-specific
+ * tag to be successfully transmitted
+ */
+ if (unlikely(netpoll_tx_running(dev)))
+ return dsa_slave_netpoll_send_skb(dev, skb);
+
+ /* Queue the SKB for transmission on the parent interface, but
+ * do not modify its EtherType
+ */
+ skb->dev = dsa_slave_to_master(dev);
+ dev_queue_xmit(skb);
+
+ return NETDEV_TX_OK;
+}
+EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
+
+static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev)
+{
+ int needed_headroom = dev->needed_headroom;
+ int needed_tailroom = dev->needed_tailroom;
+
+ /* For tail taggers, we need to pad short frames ourselves, to ensure
+ * that the tail tag does not fail at its role of being at the end of
+ * the packet, once the master interface pads the frame. Account for
+ * that pad length here, and pad later.
+ */
+ if (unlikely(needed_tailroom && skb->len < ETH_ZLEN))
+ needed_tailroom += ETH_ZLEN - skb->len;
+ /* skb_headroom() returns unsigned int... */
+ needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0);
+ needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0);
+
+ if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb)))
+ /* No reallocation needed, yay! */
+ return 0;
+
+ return pskb_expand_head(skb, needed_headroom, needed_tailroom,
+ GFP_ATOMIC);
+}
+
+static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct sk_buff *nskb;
+
+ dev_sw_netstats_tx_add(dev, 1, skb->len);
+
+ memset(skb->cb, 0, sizeof(skb->cb));
+
+ /* Handle tx timestamp if any */
+ dsa_skb_tx_timestamp(p, skb);
+
+ if (dsa_realloc_skb(skb, dev)) {
+ dev_kfree_skb_any(skb);
+ return NETDEV_TX_OK;
+ }
+
+ /* needed_tailroom should still be 'warm' in the cache line from
+ * dsa_realloc_skb(), which has also ensured that padding is safe.
+ */
+ if (dev->needed_tailroom)
+ eth_skb_pad(skb);
+
+ /* Transmit function may have to reallocate the original SKB,
+ * in which case it must have freed it. Only free it here on error.
+ */
+ nskb = p->xmit(skb, dev);
+ if (!nskb) {
+ kfree_skb(skb);
+ return NETDEV_TX_OK;
+ }
+
+ return dsa_enqueue_skb(nskb, dev);
+}
+
+/* ethtool operations *******************************************************/
+
+static void dsa_slave_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *drvinfo)
+{
+ strscpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
+ strscpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
+ strscpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
+}
+
+static int dsa_slave_get_regs_len(struct net_device *dev)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (ds->ops->get_regs_len)
+ return ds->ops->get_regs_len(ds, dp->index);
+
+ return -EOPNOTSUPP;
+}
+
+static void
+dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (ds->ops->get_regs)
+ ds->ops->get_regs(ds, dp->index, regs, _p);
+}
+
+static int dsa_slave_nway_reset(struct net_device *dev)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+
+ return phylink_ethtool_nway_reset(dp->pl);
+}
+
+static int dsa_slave_get_eeprom_len(struct net_device *dev)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (ds->cd && ds->cd->eeprom_len)
+ return ds->cd->eeprom_len;
+
+ if (ds->ops->get_eeprom_len)
+ return ds->ops->get_eeprom_len(ds);
+
+ return 0;
+}
+
+static int dsa_slave_get_eeprom(struct net_device *dev,
+ struct ethtool_eeprom *eeprom, u8 *data)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (ds->ops->get_eeprom)
+ return ds->ops->get_eeprom(ds, eeprom, data);
+
+ return -EOPNOTSUPP;
+}
+
+static int dsa_slave_set_eeprom(struct net_device *dev,
+ struct ethtool_eeprom *eeprom, u8 *data)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (ds->ops->set_eeprom)
+ return ds->ops->set_eeprom(ds, eeprom, data);
+
+ return -EOPNOTSUPP;
+}
+
+static void dsa_slave_get_strings(struct net_device *dev,
+ uint32_t stringset, uint8_t *data)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (stringset == ETH_SS_STATS) {
+ int len = ETH_GSTRING_LEN;
+
+ strncpy(data, "tx_packets", len);
+ strncpy(data + len, "tx_bytes", len);
+ strncpy(data + 2 * len, "rx_packets", len);
+ strncpy(data + 3 * len, "rx_bytes", len);
+ if (ds->ops->get_strings)
+ ds->ops->get_strings(ds, dp->index, stringset,
+ data + 4 * len);
+ } else if (stringset == ETH_SS_TEST) {
+ net_selftest_get_strings(data);
+ }
+
+}
+
+static void dsa_slave_get_ethtool_stats(struct net_device *dev,
+ struct ethtool_stats *stats,
+ uint64_t *data)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+ struct pcpu_sw_netstats *s;
+ unsigned int start;
+ int i;
+
+ for_each_possible_cpu(i) {
+ u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
+
+ s = per_cpu_ptr(dev->tstats, i);
+ do {
+ start = u64_stats_fetch_begin_irq(&s->syncp);
+ tx_packets = u64_stats_read(&s->tx_packets);
+ tx_bytes = u64_stats_read(&s->tx_bytes);
+ rx_packets = u64_stats_read(&s->rx_packets);
+ rx_bytes = u64_stats_read(&s->rx_bytes);
+ } while (u64_stats_fetch_retry_irq(&s->syncp, start));
+ data[0] += tx_packets;
+ data[1] += tx_bytes;
+ data[2] += rx_packets;
+ data[3] += rx_bytes;
+ }
+ if (ds->ops->get_ethtool_stats)
+ ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
+}
+
+static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (sset == ETH_SS_STATS) {
+ int count = 0;
+
+ if (ds->ops->get_sset_count) {
+ count = ds->ops->get_sset_count(ds, dp->index, sset);
+ if (count < 0)
+ return count;
+ }
+
+ return count + 4;
+ } else if (sset == ETH_SS_TEST) {
+ return net_selftest_get_count();
+ }
+
+ return -EOPNOTSUPP;
+}
+
+static void dsa_slave_get_eth_phy_stats(struct net_device *dev,
+ struct ethtool_eth_phy_stats *phy_stats)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (ds->ops->get_eth_phy_stats)
+ ds->ops->get_eth_phy_stats(ds, dp->index, phy_stats);
+}
+
+static void dsa_slave_get_eth_mac_stats(struct net_device *dev,
+ struct ethtool_eth_mac_stats *mac_stats)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (ds->ops->get_eth_mac_stats)
+ ds->ops->get_eth_mac_stats(ds, dp->index, mac_stats);
+}
+
+static void
+dsa_slave_get_eth_ctrl_stats(struct net_device *dev,
+ struct ethtool_eth_ctrl_stats *ctrl_stats)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (ds->ops->get_eth_ctrl_stats)
+ ds->ops->get_eth_ctrl_stats(ds, dp->index, ctrl_stats);
+}
+
+static void
+dsa_slave_get_rmon_stats(struct net_device *dev,
+ struct ethtool_rmon_stats *rmon_stats,
+ const struct ethtool_rmon_hist_range **ranges)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (ds->ops->get_rmon_stats)
+ ds->ops->get_rmon_stats(ds, dp->index, rmon_stats, ranges);
+}
+
+static void dsa_slave_net_selftest(struct net_device *ndev,
+ struct ethtool_test *etest, u64 *buf)
+{
+ struct dsa_port *dp = dsa_slave_to_port(ndev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (ds->ops->self_test) {
+ ds->ops->self_test(ds, dp->index, etest, buf);
+ return;
+ }
+
+ net_selftest(ndev, etest, buf);
+}
+
+static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ phylink_ethtool_get_wol(dp->pl, w);
+
+ if (ds->ops->get_wol)
+ ds->ops->get_wol(ds, dp->index, w);
+}
+
+static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+ int ret = -EOPNOTSUPP;
+
+ phylink_ethtool_set_wol(dp->pl, w);
+
+ if (ds->ops->set_wol)
+ ret = ds->ops->set_wol(ds, dp->index, w);
+
+ return ret;
+}
+
+static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+ int ret;
+
+ /* Port's PHY and MAC both need to be EEE capable */
+ if (!dev->phydev || !dp->pl)
+ return -ENODEV;
+
+ if (!ds->ops->set_mac_eee)
+ return -EOPNOTSUPP;
+
+ ret = ds->ops->set_mac_eee(ds, dp->index, e);
+ if (ret)
+ return ret;
+
+ return phylink_ethtool_set_eee(dp->pl, e);
+}
+
+static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+ int ret;
+
+ /* Port's PHY and MAC both need to be EEE capable */
+ if (!dev->phydev || !dp->pl)
+ return -ENODEV;
+
+ if (!ds->ops->get_mac_eee)
+ return -EOPNOTSUPP;
+
+ ret = ds->ops->get_mac_eee(ds, dp->index, e);
+ if (ret)
+ return ret;
+
+ return phylink_ethtool_get_eee(dp->pl, e);
+}
+
+static int dsa_slave_get_link_ksettings(struct net_device *dev,
+ struct ethtool_link_ksettings *cmd)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+
+ return phylink_ethtool_ksettings_get(dp->pl, cmd);
+}
+
+static int dsa_slave_set_link_ksettings(struct net_device *dev,
+ const struct ethtool_link_ksettings *cmd)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+
+ return phylink_ethtool_ksettings_set(dp->pl, cmd);
+}
+
+static void dsa_slave_get_pause_stats(struct net_device *dev,
+ struct ethtool_pause_stats *pause_stats)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (ds->ops->get_pause_stats)
+ ds->ops->get_pause_stats(ds, dp->index, pause_stats);
+}
+
+static void dsa_slave_get_pauseparam(struct net_device *dev,
+ struct ethtool_pauseparam *pause)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+
+ phylink_ethtool_get_pauseparam(dp->pl, pause);
+}
+
+static int dsa_slave_set_pauseparam(struct net_device *dev,
+ struct ethtool_pauseparam *pause)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+
+ return phylink_ethtool_set_pauseparam(dp->pl, pause);
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static int dsa_slave_netpoll_setup(struct net_device *dev,
+ struct netpoll_info *ni)
+{
+ struct net_device *master = dsa_slave_to_master(dev);
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct netpoll *netpoll;
+ int err = 0;
+
+ netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
+ if (!netpoll)
+ return -ENOMEM;
+
+ err = __netpoll_setup(netpoll, master);
+ if (err) {
+ kfree(netpoll);
+ goto out;
+ }
+
+ p->netpoll = netpoll;
+out:
+ return err;
+}
+
+static void dsa_slave_netpoll_cleanup(struct net_device *dev)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct netpoll *netpoll = p->netpoll;
+
+ if (!netpoll)
+ return;
+
+ p->netpoll = NULL;
+
+ __netpoll_free(netpoll);
+}
+
+static void dsa_slave_poll_controller(struct net_device *dev)
+{
+}
+#endif
+
+static struct dsa_mall_tc_entry *
+dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct dsa_mall_tc_entry *mall_tc_entry;
+
+ list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
+ if (mall_tc_entry->cookie == cookie)
+ return mall_tc_entry;
+
+ return NULL;
+}
+
+static int
+dsa_slave_add_cls_matchall_mirred(struct net_device *dev,
+ struct tc_cls_matchall_offload *cls,
+ bool ingress)
+{
+ struct netlink_ext_ack *extack = cls->common.extack;
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct dsa_mall_mirror_tc_entry *mirror;
+ struct dsa_mall_tc_entry *mall_tc_entry;
+ struct dsa_switch *ds = dp->ds;
+ struct flow_action_entry *act;
+ struct dsa_port *to_dp;
+ int err;
+
+ if (!ds->ops->port_mirror_add)
+ return -EOPNOTSUPP;
+
+ if (!flow_action_basic_hw_stats_check(&cls->rule->action,
+ cls->common.extack))
+ return -EOPNOTSUPP;
+
+ act = &cls->rule->action.entries[0];
+
+ if (!act->dev)
+ return -EINVAL;
+
+ if (!dsa_slave_dev_check(act->dev))
+ return -EOPNOTSUPP;
+
+ mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
+ if (!mall_tc_entry)
+ return -ENOMEM;
+
+ mall_tc_entry->cookie = cls->cookie;
+ mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
+ mirror = &mall_tc_entry->mirror;
+
+ to_dp = dsa_slave_to_port(act->dev);
+
+ mirror->to_local_port = to_dp->index;
+ mirror->ingress = ingress;
+
+ err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress, extack);
+ if (err) {
+ kfree(mall_tc_entry);
+ return err;
+ }
+
+ list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
+
+ return err;
+}
+
+static int
+dsa_slave_add_cls_matchall_police(struct net_device *dev,
+ struct tc_cls_matchall_offload *cls,
+ bool ingress)
+{
+ struct netlink_ext_ack *extack = cls->common.extack;
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct dsa_mall_policer_tc_entry *policer;
+ struct dsa_mall_tc_entry *mall_tc_entry;
+ struct dsa_switch *ds = dp->ds;
+ struct flow_action_entry *act;
+ int err;
+
+ if (!ds->ops->port_policer_add) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Policing offload not implemented");
+ return -EOPNOTSUPP;
+ }
+
+ if (!ingress) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Only supported on ingress qdisc");
+ return -EOPNOTSUPP;
+ }
+
+ if (!flow_action_basic_hw_stats_check(&cls->rule->action,
+ cls->common.extack))
+ return -EOPNOTSUPP;
+
+ list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) {
+ if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Only one port policer allowed");
+ return -EEXIST;
+ }
+ }
+
+ act = &cls->rule->action.entries[0];
+
+ mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
+ if (!mall_tc_entry)
+ return -ENOMEM;
+
+ mall_tc_entry->cookie = cls->cookie;
+ mall_tc_entry->type = DSA_PORT_MALL_POLICER;
+ policer = &mall_tc_entry->policer;
+ policer->rate_bytes_per_sec = act->police.rate_bytes_ps;
+ policer->burst = act->police.burst;
+
+ err = ds->ops->port_policer_add(ds, dp->index, policer);
+ if (err) {
+ kfree(mall_tc_entry);
+ return err;
+ }
+
+ list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
+
+ return err;
+}
+
+static int dsa_slave_add_cls_matchall(struct net_device *dev,
+ struct tc_cls_matchall_offload *cls,
+ bool ingress)
+{
+ int err = -EOPNOTSUPP;
+
+ if (cls->common.protocol == htons(ETH_P_ALL) &&
+ flow_offload_has_one_action(&cls->rule->action) &&
+ cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED)
+ err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress);
+ else if (flow_offload_has_one_action(&cls->rule->action) &&
+ cls->rule->action.entries[0].id == FLOW_ACTION_POLICE)
+ err = dsa_slave_add_cls_matchall_police(dev, cls, ingress);
+
+ return err;
+}
+
+static void dsa_slave_del_cls_matchall(struct net_device *dev,
+ struct tc_cls_matchall_offload *cls)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_mall_tc_entry *mall_tc_entry;
+ struct dsa_switch *ds = dp->ds;
+
+ mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
+ if (!mall_tc_entry)
+ return;
+
+ list_del(&mall_tc_entry->list);
+
+ switch (mall_tc_entry->type) {
+ case DSA_PORT_MALL_MIRROR:
+ if (ds->ops->port_mirror_del)
+ ds->ops->port_mirror_del(ds, dp->index,
+ &mall_tc_entry->mirror);
+ break;
+ case DSA_PORT_MALL_POLICER:
+ if (ds->ops->port_policer_del)
+ ds->ops->port_policer_del(ds, dp->index);
+ break;
+ default:
+ WARN_ON(1);
+ }
+
+ kfree(mall_tc_entry);
+}
+
+static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
+ struct tc_cls_matchall_offload *cls,
+ bool ingress)
+{
+ if (cls->common.chain_index)
+ return -EOPNOTSUPP;
+
+ switch (cls->command) {
+ case TC_CLSMATCHALL_REPLACE:
+ return dsa_slave_add_cls_matchall(dev, cls, ingress);
+ case TC_CLSMATCHALL_DESTROY:
+ dsa_slave_del_cls_matchall(dev, cls);
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int dsa_slave_add_cls_flower(struct net_device *dev,
+ struct flow_cls_offload *cls,
+ bool ingress)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+ int port = dp->index;
+
+ if (!ds->ops->cls_flower_add)
+ return -EOPNOTSUPP;
+
+ return ds->ops->cls_flower_add(ds, port, cls, ingress);
+}
+
+static int dsa_slave_del_cls_flower(struct net_device *dev,
+ struct flow_cls_offload *cls,
+ bool ingress)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+ int port = dp->index;
+
+ if (!ds->ops->cls_flower_del)
+ return -EOPNOTSUPP;
+
+ return ds->ops->cls_flower_del(ds, port, cls, ingress);
+}
+
+static int dsa_slave_stats_cls_flower(struct net_device *dev,
+ struct flow_cls_offload *cls,
+ bool ingress)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+ int port = dp->index;
+
+ if (!ds->ops->cls_flower_stats)
+ return -EOPNOTSUPP;
+
+ return ds->ops->cls_flower_stats(ds, port, cls, ingress);
+}
+
+static int dsa_slave_setup_tc_cls_flower(struct net_device *dev,
+ struct flow_cls_offload *cls,
+ bool ingress)
+{
+ switch (cls->command) {
+ case FLOW_CLS_REPLACE:
+ return dsa_slave_add_cls_flower(dev, cls, ingress);
+ case FLOW_CLS_DESTROY:
+ return dsa_slave_del_cls_flower(dev, cls, ingress);
+ case FLOW_CLS_STATS:
+ return dsa_slave_stats_cls_flower(dev, cls, ingress);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
+ void *cb_priv, bool ingress)
+{
+ struct net_device *dev = cb_priv;
+
+ if (!tc_can_offload(dev))
+ return -EOPNOTSUPP;
+
+ switch (type) {
+ case TC_SETUP_CLSMATCHALL:
+ return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
+ case TC_SETUP_CLSFLOWER:
+ return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
+ void *type_data, void *cb_priv)
+{
+ return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
+}
+
+static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
+ void *type_data, void *cb_priv)
+{
+ return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
+}
+
+static LIST_HEAD(dsa_slave_block_cb_list);
+
+static int dsa_slave_setup_tc_block(struct net_device *dev,
+ struct flow_block_offload *f)
+{
+ struct flow_block_cb *block_cb;
+ flow_setup_cb_t *cb;
+
+ if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
+ cb = dsa_slave_setup_tc_block_cb_ig;
+ else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
+ cb = dsa_slave_setup_tc_block_cb_eg;
+ else
+ return -EOPNOTSUPP;
+
+ f->driver_block_list = &dsa_slave_block_cb_list;
+
+ switch (f->command) {
+ case FLOW_BLOCK_BIND:
+ if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list))
+ return -EBUSY;
+
+ block_cb = flow_block_cb_alloc(cb, dev, dev, NULL);
+ if (IS_ERR(block_cb))
+ return PTR_ERR(block_cb);
+
+ flow_block_cb_add(block_cb, f);
+ list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list);
+ return 0;
+ case FLOW_BLOCK_UNBIND:
+ block_cb = flow_block_cb_lookup(f->block, cb, dev);
+ if (!block_cb)
+ return -ENOENT;
+
+ flow_block_cb_remove(block_cb, f);
+ list_del(&block_cb->driver_list);
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int dsa_slave_setup_ft_block(struct dsa_switch *ds, int port,
+ void *type_data)
+{
+ struct net_device *master = dsa_port_to_master(dsa_to_port(ds, port));
+
+ if (!master->netdev_ops->ndo_setup_tc)
+ return -EOPNOTSUPP;
+
+ return master->netdev_ops->ndo_setup_tc(master, TC_SETUP_FT, type_data);
+}
+
+static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
+ void *type_data)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ switch (type) {
+ case TC_SETUP_BLOCK:
+ return dsa_slave_setup_tc_block(dev, type_data);
+ case TC_SETUP_FT:
+ return dsa_slave_setup_ft_block(ds, dp->index, type_data);
+ default:
+ break;
+ }
+
+ if (!ds->ops->port_setup_tc)
+ return -EOPNOTSUPP;
+
+ return ds->ops->port_setup_tc(ds, dp->index, type, type_data);
+}
+
+static int dsa_slave_get_rxnfc(struct net_device *dev,
+ struct ethtool_rxnfc *nfc, u32 *rule_locs)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->get_rxnfc)
+ return -EOPNOTSUPP;
+
+ return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
+}
+
+static int dsa_slave_set_rxnfc(struct net_device *dev,
+ struct ethtool_rxnfc *nfc)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->set_rxnfc)
+ return -EOPNOTSUPP;
+
+ return ds->ops->set_rxnfc(ds, dp->index, nfc);
+}
+
+static int dsa_slave_get_ts_info(struct net_device *dev,
+ struct ethtool_ts_info *ts)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct dsa_switch *ds = p->dp->ds;
+
+ if (!ds->ops->get_ts_info)
+ return -EOPNOTSUPP;
+
+ return ds->ops->get_ts_info(ds, p->dp->index, ts);
+}
+
+static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
+ u16 vid)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct switchdev_obj_port_vlan vlan = {
+ .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
+ .vid = vid,
+ /* This API only allows programming tagged, non-PVID VIDs */
+ .flags = 0,
+ };
+ struct netlink_ext_ack extack = {0};
+ int ret;
+
+ /* User port... */
+ ret = dsa_port_vlan_add(dp, &vlan, &extack);
+ if (ret) {
+ if (extack._msg)
+ netdev_err(dev, "%s\n", extack._msg);
+ return ret;
+ }
+
+ /* And CPU port... */
+ ret = dsa_port_host_vlan_add(dp, &vlan, &extack);
+ if (ret) {
+ if (extack._msg)
+ netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index,
+ extack._msg);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
+ u16 vid)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct switchdev_obj_port_vlan vlan = {
+ .vid = vid,
+ /* This API only allows programming tagged, non-PVID VIDs */
+ .flags = 0,
+ };
+ int err;
+
+ err = dsa_port_vlan_del(dp, &vlan);
+ if (err)
+ return err;
+
+ return dsa_port_host_vlan_del(dp, &vlan);
+}
+
+static int dsa_slave_restore_vlan(struct net_device *vdev, int vid, void *arg)
+{
+ __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q);
+
+ return dsa_slave_vlan_rx_add_vid(arg, proto, vid);
+}
+
+static int dsa_slave_clear_vlan(struct net_device *vdev, int vid, void *arg)
+{
+ __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q);
+
+ return dsa_slave_vlan_rx_kill_vid(arg, proto, vid);
+}
+
+/* Keep the VLAN RX filtering list in sync with the hardware only if VLAN
+ * filtering is enabled. The baseline is that only ports that offload a
+ * VLAN-aware bridge are VLAN-aware, and standalone ports are VLAN-unaware,
+ * but there are exceptions for quirky hardware.
+ *
+ * If ds->vlan_filtering_is_global = true, then standalone ports which share
+ * the same switch with other ports that offload a VLAN-aware bridge are also
+ * inevitably VLAN-aware.
+ *
+ * To summarize, a DSA switch port offloads:
+ *
+ * - If standalone (this includes software bridge, software LAG):
+ * - if ds->needs_standalone_vlan_filtering = true, OR if
+ * (ds->vlan_filtering_is_global = true AND there are bridges spanning
+ * this switch chip which have vlan_filtering=1)
+ * - the 8021q upper VLANs
+ * - else (standalone VLAN filtering is not needed, VLAN filtering is not
+ * global, or it is, but no port is under a VLAN-aware bridge):
+ * - no VLAN (any 8021q upper is a software VLAN)
+ *
+ * - If under a vlan_filtering=0 bridge which it offload:
+ * - if ds->configure_vlan_while_not_filtering = true (default):
+ * - the bridge VLANs. These VLANs are committed to hardware but inactive.
+ * - else (deprecated):
+ * - no VLAN. The bridge VLANs are not restored when VLAN awareness is
+ * enabled, so this behavior is broken and discouraged.
+ *
+ * - If under a vlan_filtering=1 bridge which it offload:
+ * - the bridge VLANs
+ * - the 8021q upper VLANs
+ */
+int dsa_slave_manage_vlan_filtering(struct net_device *slave,
+ bool vlan_filtering)
+{
+ int err;
+
+ if (vlan_filtering) {
+ slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
+
+ err = vlan_for_each(slave, dsa_slave_restore_vlan, slave);
+ if (err) {
+ vlan_for_each(slave, dsa_slave_clear_vlan, slave);
+ slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
+ return err;
+ }
+ } else {
+ err = vlan_for_each(slave, dsa_slave_clear_vlan, slave);
+ if (err)
+ return err;
+
+ slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
+ }
+
+ return 0;
+}
+
+struct dsa_hw_port {
+ struct list_head list;
+ struct net_device *dev;
+ int old_mtu;
+};
+
+static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu)
+{
+ const struct dsa_hw_port *p;
+ int err;
+
+ list_for_each_entry(p, hw_port_list, list) {
+ if (p->dev->mtu == mtu)
+ continue;
+
+ err = dev_set_mtu(p->dev, mtu);
+ if (err)
+ goto rollback;
+ }
+
+ return 0;
+
+rollback:
+ list_for_each_entry_continue_reverse(p, hw_port_list, list) {
+ if (p->dev->mtu == p->old_mtu)
+ continue;
+
+ if (dev_set_mtu(p->dev, p->old_mtu))
+ netdev_err(p->dev, "Failed to restore MTU\n");
+ }
+
+ return err;
+}
+
+static void dsa_hw_port_list_free(struct list_head *hw_port_list)
+{
+ struct dsa_hw_port *p, *n;
+
+ list_for_each_entry_safe(p, n, hw_port_list, list)
+ kfree(p);
+}
+
+/* Make the hardware datapath to/from @dev limited to a common MTU */
+static void dsa_bridge_mtu_normalization(struct dsa_port *dp)
+{
+ struct list_head hw_port_list;
+ struct dsa_switch_tree *dst;
+ int min_mtu = ETH_MAX_MTU;
+ struct dsa_port *other_dp;
+ int err;
+
+ if (!dp->ds->mtu_enforcement_ingress)
+ return;
+
+ if (!dp->bridge)
+ return;
+
+ INIT_LIST_HEAD(&hw_port_list);
+
+ /* Populate the list of ports that are part of the same bridge
+ * as the newly added/modified port
+ */
+ list_for_each_entry(dst, &dsa_tree_list, list) {
+ list_for_each_entry(other_dp, &dst->ports, list) {
+ struct dsa_hw_port *hw_port;
+ struct net_device *slave;
+
+ if (other_dp->type != DSA_PORT_TYPE_USER)
+ continue;
+
+ if (!dsa_port_bridge_same(dp, other_dp))
+ continue;
+
+ if (!other_dp->ds->mtu_enforcement_ingress)
+ continue;
+
+ slave = other_dp->slave;
+
+ if (min_mtu > slave->mtu)
+ min_mtu = slave->mtu;
+
+ hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL);
+ if (!hw_port)
+ goto out;
+
+ hw_port->dev = slave;
+ hw_port->old_mtu = slave->mtu;
+
+ list_add(&hw_port->list, &hw_port_list);
+ }
+ }
+
+ /* Attempt to configure the entire hardware bridge to the newly added
+ * interface's MTU first, regardless of whether the intention of the
+ * user was to raise or lower it.
+ */
+ err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu);
+ if (!err)
+ goto out;
+
+ /* Clearly that didn't work out so well, so just set the minimum MTU on
+ * all hardware bridge ports now. If this fails too, then all ports will
+ * still have their old MTU rolled back anyway.
+ */
+ dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu);
+
+out:
+ dsa_hw_port_list_free(&hw_port_list);
+}
+
+int dsa_slave_change_mtu(struct net_device *dev, int new_mtu)
+{
+ struct net_device *master = dsa_slave_to_master(dev);
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_port *cpu_dp = dp->cpu_dp;
+ struct dsa_switch *ds = dp->ds;
+ struct dsa_port *other_dp;
+ int largest_mtu = 0;
+ int new_master_mtu;
+ int old_master_mtu;
+ int mtu_limit;
+ int overhead;
+ int cpu_mtu;
+ int err;
+
+ if (!ds->ops->port_change_mtu)
+ return -EOPNOTSUPP;
+
+ dsa_tree_for_each_user_port(other_dp, ds->dst) {
+ int slave_mtu;
+
+ /* During probe, this function will be called for each slave
+ * device, while not all of them have been allocated. That's
+ * ok, it doesn't change what the maximum is, so ignore it.
+ */
+ if (!other_dp->slave)
+ continue;
+
+ /* Pretend that we already applied the setting, which we
+ * actually haven't (still haven't done all integrity checks)
+ */
+ if (dp == other_dp)
+ slave_mtu = new_mtu;
+ else
+ slave_mtu = other_dp->slave->mtu;
+
+ if (largest_mtu < slave_mtu)
+ largest_mtu = slave_mtu;
+ }
+
+ overhead = dsa_tag_protocol_overhead(cpu_dp->tag_ops);
+ mtu_limit = min_t(int, master->max_mtu, dev->max_mtu + overhead);
+ old_master_mtu = master->mtu;
+ new_master_mtu = largest_mtu + overhead;
+ if (new_master_mtu > mtu_limit)
+ return -ERANGE;
+
+ /* If the master MTU isn't over limit, there's no need to check the CPU
+ * MTU, since that surely isn't either.
+ */
+ cpu_mtu = largest_mtu;
+
+ /* Start applying stuff */
+ if (new_master_mtu != old_master_mtu) {
+ err = dev_set_mtu(master, new_master_mtu);
+ if (err < 0)
+ goto out_master_failed;
+
+ /* We only need to propagate the MTU of the CPU port to
+ * upstream switches, so emit a notifier which updates them.
+ */
+ err = dsa_port_mtu_change(cpu_dp, cpu_mtu);
+ if (err)
+ goto out_cpu_failed;
+ }
+
+ err = ds->ops->port_change_mtu(ds, dp->index, new_mtu);
+ if (err)
+ goto out_port_failed;
+
+ dev->mtu = new_mtu;
+
+ dsa_bridge_mtu_normalization(dp);
+
+ return 0;
+
+out_port_failed:
+ if (new_master_mtu != old_master_mtu)
+ dsa_port_mtu_change(cpu_dp, old_master_mtu - overhead);
+out_cpu_failed:
+ if (new_master_mtu != old_master_mtu)
+ dev_set_mtu(master, old_master_mtu);
+out_master_failed:
+ return err;
+}
+
+static int __maybe_unused
+dsa_slave_dcbnl_set_default_prio(struct net_device *dev, struct dcb_app *app)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+ unsigned long mask, new_prio;
+ int err, port = dp->index;
+
+ if (!ds->ops->port_set_default_prio)
+ return -EOPNOTSUPP;
+
+ err = dcb_ieee_setapp(dev, app);
+ if (err)
+ return err;
+
+ mask = dcb_ieee_getapp_mask(dev, app);
+ new_prio = __fls(mask);
+
+ err = ds->ops->port_set_default_prio(ds, port, new_prio);
+ if (err) {
+ dcb_ieee_delapp(dev, app);
+ return err;
+ }
+
+ return 0;
+}
+
+static int __maybe_unused
+dsa_slave_dcbnl_add_dscp_prio(struct net_device *dev, struct dcb_app *app)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+ unsigned long mask, new_prio;
+ int err, port = dp->index;
+ u8 dscp = app->protocol;
+
+ if (!ds->ops->port_add_dscp_prio)
+ return -EOPNOTSUPP;
+
+ if (dscp >= 64) {
+ netdev_err(dev, "DSCP APP entry with protocol value %u is invalid\n",
+ dscp);
+ return -EINVAL;
+ }
+
+ err = dcb_ieee_setapp(dev, app);
+ if (err)
+ return err;
+
+ mask = dcb_ieee_getapp_mask(dev, app);
+ new_prio = __fls(mask);
+
+ err = ds->ops->port_add_dscp_prio(ds, port, dscp, new_prio);
+ if (err) {
+ dcb_ieee_delapp(dev, app);
+ return err;
+ }
+
+ return 0;
+}
+
+static int __maybe_unused dsa_slave_dcbnl_ieee_setapp(struct net_device *dev,
+ struct dcb_app *app)
+{
+ switch (app->selector) {
+ case IEEE_8021QAZ_APP_SEL_ETHERTYPE:
+ switch (app->protocol) {
+ case 0:
+ return dsa_slave_dcbnl_set_default_prio(dev, app);
+ default:
+ return -EOPNOTSUPP;
+ }
+ break;
+ case IEEE_8021QAZ_APP_SEL_DSCP:
+ return dsa_slave_dcbnl_add_dscp_prio(dev, app);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int __maybe_unused
+dsa_slave_dcbnl_del_default_prio(struct net_device *dev, struct dcb_app *app)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+ unsigned long mask, new_prio;
+ int err, port = dp->index;
+
+ if (!ds->ops->port_set_default_prio)
+ return -EOPNOTSUPP;
+
+ err = dcb_ieee_delapp(dev, app);
+ if (err)
+ return err;
+
+ mask = dcb_ieee_getapp_mask(dev, app);
+ new_prio = mask ? __fls(mask) : 0;
+
+ err = ds->ops->port_set_default_prio(ds, port, new_prio);
+ if (err) {
+ dcb_ieee_setapp(dev, app);
+ return err;
+ }
+
+ return 0;
+}
+
+static int __maybe_unused
+dsa_slave_dcbnl_del_dscp_prio(struct net_device *dev, struct dcb_app *app)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+ int err, port = dp->index;
+ u8 dscp = app->protocol;
+
+ if (!ds->ops->port_del_dscp_prio)
+ return -EOPNOTSUPP;
+
+ err = dcb_ieee_delapp(dev, app);
+ if (err)
+ return err;
+
+ err = ds->ops->port_del_dscp_prio(ds, port, dscp, app->priority);
+ if (err) {
+ dcb_ieee_setapp(dev, app);
+ return err;
+ }
+
+ return 0;
+}
+
+static int __maybe_unused dsa_slave_dcbnl_ieee_delapp(struct net_device *dev,
+ struct dcb_app *app)
+{
+ switch (app->selector) {
+ case IEEE_8021QAZ_APP_SEL_ETHERTYPE:
+ switch (app->protocol) {
+ case 0:
+ return dsa_slave_dcbnl_del_default_prio(dev, app);
+ default:
+ return -EOPNOTSUPP;
+ }
+ break;
+ case IEEE_8021QAZ_APP_SEL_DSCP:
+ return dsa_slave_dcbnl_del_dscp_prio(dev, app);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+/* Pre-populate the DCB application priority table with the priorities
+ * configured during switch setup, which we read from hardware here.
+ */
+static int dsa_slave_dcbnl_init(struct net_device *dev)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+ int port = dp->index;
+ int err;
+
+ if (ds->ops->port_get_default_prio) {
+ int prio = ds->ops->port_get_default_prio(ds, port);
+ struct dcb_app app = {
+ .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE,
+ .protocol = 0,
+ .priority = prio,
+ };
+
+ if (prio < 0)
+ return prio;
+
+ err = dcb_ieee_setapp(dev, &app);
+ if (err)
+ return err;
+ }
+
+ if (ds->ops->port_get_dscp_prio) {
+ int protocol;
+
+ for (protocol = 0; protocol < 64; protocol++) {
+ struct dcb_app app = {
+ .selector = IEEE_8021QAZ_APP_SEL_DSCP,
+ .protocol = protocol,
+ };
+ int prio;
+
+ prio = ds->ops->port_get_dscp_prio(ds, port, protocol);
+ if (prio == -EOPNOTSUPP)
+ continue;
+ if (prio < 0)
+ return prio;
+
+ app.priority = prio;
+
+ err = dcb_ieee_setapp(dev, &app);
+ if (err)
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+static const struct ethtool_ops dsa_slave_ethtool_ops = {
+ .get_drvinfo = dsa_slave_get_drvinfo,
+ .get_regs_len = dsa_slave_get_regs_len,
+ .get_regs = dsa_slave_get_regs,
+ .nway_reset = dsa_slave_nway_reset,
+ .get_link = ethtool_op_get_link,
+ .get_eeprom_len = dsa_slave_get_eeprom_len,
+ .get_eeprom = dsa_slave_get_eeprom,
+ .set_eeprom = dsa_slave_set_eeprom,
+ .get_strings = dsa_slave_get_strings,
+ .get_ethtool_stats = dsa_slave_get_ethtool_stats,
+ .get_sset_count = dsa_slave_get_sset_count,
+ .get_eth_phy_stats = dsa_slave_get_eth_phy_stats,
+ .get_eth_mac_stats = dsa_slave_get_eth_mac_stats,
+ .get_eth_ctrl_stats = dsa_slave_get_eth_ctrl_stats,
+ .get_rmon_stats = dsa_slave_get_rmon_stats,
+ .set_wol = dsa_slave_set_wol,
+ .get_wol = dsa_slave_get_wol,
+ .set_eee = dsa_slave_set_eee,
+ .get_eee = dsa_slave_get_eee,
+ .get_link_ksettings = dsa_slave_get_link_ksettings,
+ .set_link_ksettings = dsa_slave_set_link_ksettings,
+ .get_pause_stats = dsa_slave_get_pause_stats,
+ .get_pauseparam = dsa_slave_get_pauseparam,
+ .set_pauseparam = dsa_slave_set_pauseparam,
+ .get_rxnfc = dsa_slave_get_rxnfc,
+ .set_rxnfc = dsa_slave_set_rxnfc,
+ .get_ts_info = dsa_slave_get_ts_info,
+ .self_test = dsa_slave_net_selftest,
+};
+
+static const struct dcbnl_rtnl_ops __maybe_unused dsa_slave_dcbnl_ops = {
+ .ieee_setapp = dsa_slave_dcbnl_ieee_setapp,
+ .ieee_delapp = dsa_slave_dcbnl_ieee_delapp,
+};
+
+static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+
+ return &dp->devlink_port;
+}
+
+static void dsa_slave_get_stats64(struct net_device *dev,
+ struct rtnl_link_stats64 *s)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (ds->ops->get_stats64)
+ ds->ops->get_stats64(ds, dp->index, s);
+ else
+ dev_get_tstats64(dev, s);
+}
+
+static int dsa_slave_fill_forward_path(struct net_device_path_ctx *ctx,
+ struct net_device_path *path)
+{
+ struct dsa_port *dp = dsa_slave_to_port(ctx->dev);
+ struct net_device *master = dsa_port_to_master(dp);
+ struct dsa_port *cpu_dp = dp->cpu_dp;
+
+ path->dev = ctx->dev;
+ path->type = DEV_PATH_DSA;
+ path->dsa.proto = cpu_dp->tag_ops->proto;
+ path->dsa.port = dp->index;
+ ctx->dev = master;
+
+ return 0;
+}
+
+static const struct net_device_ops dsa_slave_netdev_ops = {
+ .ndo_open = dsa_slave_open,
+ .ndo_stop = dsa_slave_close,
+ .ndo_start_xmit = dsa_slave_xmit,
+ .ndo_change_rx_flags = dsa_slave_change_rx_flags,
+ .ndo_set_rx_mode = dsa_slave_set_rx_mode,
+ .ndo_set_mac_address = dsa_slave_set_mac_address,
+ .ndo_fdb_dump = dsa_slave_fdb_dump,
+ .ndo_eth_ioctl = dsa_slave_ioctl,
+ .ndo_get_iflink = dsa_slave_get_iflink,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_netpoll_setup = dsa_slave_netpoll_setup,
+ .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
+ .ndo_poll_controller = dsa_slave_poll_controller,
+#endif
+ .ndo_setup_tc = dsa_slave_setup_tc,
+ .ndo_get_stats64 = dsa_slave_get_stats64,
+ .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
+ .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
+ .ndo_get_devlink_port = dsa_slave_get_devlink_port,
+ .ndo_change_mtu = dsa_slave_change_mtu,
+ .ndo_fill_forward_path = dsa_slave_fill_forward_path,
+};
+
+static struct device_type dsa_type = {
+ .name = "dsa",
+};
+
+void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
+{
+ const struct dsa_port *dp = dsa_to_port(ds, port);
+
+ if (dp->pl)
+ phylink_mac_change(dp->pl, up);
+}
+EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
+
+static void dsa_slave_phylink_fixed_state(struct phylink_config *config,
+ struct phylink_link_state *state)
+{
+ struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
+ struct dsa_switch *ds = dp->ds;
+
+ /* No need to check that this operation is valid, the callback would
+ * not be called if it was not.
+ */
+ ds->ops->phylink_fixed_state(ds, dp->index, state);
+}
+
+/* slave device setup *******************************************************/
+static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr,
+ u32 flags)
+{
+ struct dsa_port *dp = dsa_slave_to_port(slave_dev);
+ struct dsa_switch *ds = dp->ds;
+
+ slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
+ if (!slave_dev->phydev) {
+ netdev_err(slave_dev, "no phy at %d\n", addr);
+ return -ENODEV;
+ }
+
+ slave_dev->phydev->dev_flags |= flags;
+
+ return phylink_connect_phy(dp->pl, slave_dev->phydev);
+}
+
+static int dsa_slave_phy_setup(struct net_device *slave_dev)
+{
+ struct dsa_port *dp = dsa_slave_to_port(slave_dev);
+ struct device_node *port_dn = dp->dn;
+ struct dsa_switch *ds = dp->ds;
+ u32 phy_flags = 0;
+ int ret;
+
+ dp->pl_config.dev = &slave_dev->dev;
+ dp->pl_config.type = PHYLINK_NETDEV;
+
+ /* The get_fixed_state callback takes precedence over polling the
+ * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set
+ * this if the switch provides such a callback.
+ */
+ if (ds->ops->phylink_fixed_state) {
+ dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state;
+ dp->pl_config.poll_fixed_state = true;
+ }
+
+ ret = dsa_port_phylink_create(dp);
+ if (ret)
+ return ret;
+
+ if (ds->ops->get_phy_flags)
+ phy_flags = ds->ops->get_phy_flags(ds, dp->index);
+
+ ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
+ if (ret == -ENODEV && ds->slave_mii_bus) {
+ /* We could not connect to a designated PHY or SFP, so try to
+ * use the switch internal MDIO bus instead
+ */
+ ret = dsa_slave_phy_connect(slave_dev, dp->index, phy_flags);
+ }
+ if (ret) {
+ netdev_err(slave_dev, "failed to connect to PHY: %pe\n",
+ ERR_PTR(ret));
+ dsa_port_phylink_destroy(dp);
+ }
+
+ return ret;
+}
+
+void dsa_slave_setup_tagger(struct net_device *slave)
+{
+ struct dsa_port *dp = dsa_slave_to_port(slave);
+ struct net_device *master = dsa_port_to_master(dp);
+ struct dsa_slave_priv *p = netdev_priv(slave);
+ const struct dsa_port *cpu_dp = dp->cpu_dp;
+ const struct dsa_switch *ds = dp->ds;
+
+ slave->needed_headroom = cpu_dp->tag_ops->needed_headroom;
+ slave->needed_tailroom = cpu_dp->tag_ops->needed_tailroom;
+ /* Try to save one extra realloc later in the TX path (in the master)
+ * by also inheriting the master's needed headroom and tailroom.
+ * The 8021q driver also does this.
+ */
+ slave->needed_headroom += master->needed_headroom;
+ slave->needed_tailroom += master->needed_tailroom;
+
+ p->xmit = cpu_dp->tag_ops->xmit;
+
+ slave->features = master->vlan_features | NETIF_F_HW_TC;
+ slave->hw_features |= NETIF_F_HW_TC;
+ slave->features |= NETIF_F_LLTX;
+ if (slave->needed_tailroom)
+ slave->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST);
+ if (ds->needs_standalone_vlan_filtering)
+ slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
+}
+
+int dsa_slave_suspend(struct net_device *slave_dev)
+{
+ struct dsa_port *dp = dsa_slave_to_port(slave_dev);
+
+ if (!netif_running(slave_dev))
+ return 0;
+
+ netif_device_detach(slave_dev);
+
+ rtnl_lock();
+ phylink_stop(dp->pl);
+ rtnl_unlock();
+
+ return 0;
+}
+
+int dsa_slave_resume(struct net_device *slave_dev)
+{
+ struct dsa_port *dp = dsa_slave_to_port(slave_dev);
+
+ if (!netif_running(slave_dev))
+ return 0;
+
+ netif_device_attach(slave_dev);
+
+ rtnl_lock();
+ phylink_start(dp->pl);
+ rtnl_unlock();
+
+ return 0;
+}
+
+int dsa_slave_create(struct dsa_port *port)
+{
+ struct net_device *master = dsa_port_to_master(port);
+ struct dsa_switch *ds = port->ds;
+ const char *name = port->name;
+ struct net_device *slave_dev;
+ struct dsa_slave_priv *p;
+ int ret;
+
+ if (!ds->num_tx_queues)
+ ds->num_tx_queues = 1;
+
+ slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
+ NET_NAME_UNKNOWN, ether_setup,
+ ds->num_tx_queues, 1);
+ if (slave_dev == NULL)
+ return -ENOMEM;
+
+ slave_dev->rtnl_link_ops = &dsa_link_ops;
+ slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
+#if IS_ENABLED(CONFIG_DCB)
+ slave_dev->dcbnl_ops = &dsa_slave_dcbnl_ops;
+#endif
+ if (!is_zero_ether_addr(port->mac))
+ eth_hw_addr_set(slave_dev, port->mac);
+ else
+ eth_hw_addr_inherit(slave_dev, master);
+ slave_dev->priv_flags |= IFF_NO_QUEUE;
+ if (dsa_switch_supports_uc_filtering(ds))
+ slave_dev->priv_flags |= IFF_UNICAST_FLT;
+ slave_dev->netdev_ops = &dsa_slave_netdev_ops;
+ if (ds->ops->port_max_mtu)
+ slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index);
+ SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
+
+ SET_NETDEV_DEV(slave_dev, port->ds->dev);
+ slave_dev->dev.of_node = port->dn;
+ slave_dev->vlan_features = master->vlan_features;
+
+ p = netdev_priv(slave_dev);
+ slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
+ if (!slave_dev->tstats) {
+ free_netdev(slave_dev);
+ return -ENOMEM;
+ }
+
+ ret = gro_cells_init(&p->gcells, slave_dev);
+ if (ret)
+ goto out_free;
+
+ p->dp = port;
+ INIT_LIST_HEAD(&p->mall_tc_list);
+ port->slave = slave_dev;
+ dsa_slave_setup_tagger(slave_dev);
+
+ netif_carrier_off(slave_dev);
+
+ ret = dsa_slave_phy_setup(slave_dev);
+ if (ret) {
+ netdev_err(slave_dev,
+ "error %d setting up PHY for tree %d, switch %d, port %d\n",
+ ret, ds->dst->index, ds->index, port->index);
+ goto out_gcells;
+ }
+
+ rtnl_lock();
+
+ ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN);
+ if (ret && ret != -EOPNOTSUPP)
+ dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n",
+ ret, ETH_DATA_LEN, port->index);
+
+ ret = register_netdevice(slave_dev);
+ if (ret) {
+ netdev_err(master, "error %d registering interface %s\n",
+ ret, slave_dev->name);
+ rtnl_unlock();
+ goto out_phy;
+ }
+
+ if (IS_ENABLED(CONFIG_DCB)) {
+ ret = dsa_slave_dcbnl_init(slave_dev);
+ if (ret) {
+ netdev_err(slave_dev,
+ "failed to initialize DCB: %pe\n",
+ ERR_PTR(ret));
+ rtnl_unlock();
+ goto out_unregister;
+ }
+ }
+
+ ret = netdev_upper_dev_link(master, slave_dev, NULL);
+
+ rtnl_unlock();
+
+ if (ret)
+ goto out_unregister;
+
+ return 0;
+
+out_unregister:
+ unregister_netdev(slave_dev);
+out_phy:
+ rtnl_lock();
+ phylink_disconnect_phy(p->dp->pl);
+ rtnl_unlock();
+ dsa_port_phylink_destroy(p->dp);
+out_gcells:
+ gro_cells_destroy(&p->gcells);
+out_free:
+ free_percpu(slave_dev->tstats);
+ free_netdev(slave_dev);
+ port->slave = NULL;
+ return ret;
+}
+
+void dsa_slave_destroy(struct net_device *slave_dev)
+{
+ struct net_device *master = dsa_slave_to_master(slave_dev);
+ struct dsa_port *dp = dsa_slave_to_port(slave_dev);
+ struct dsa_slave_priv *p = netdev_priv(slave_dev);
+
+ netif_carrier_off(slave_dev);
+ rtnl_lock();
+ netdev_upper_dev_unlink(master, slave_dev);
+ unregister_netdevice(slave_dev);
+ phylink_disconnect_phy(dp->pl);
+ rtnl_unlock();
+
+ dsa_port_phylink_destroy(dp);
+ gro_cells_destroy(&p->gcells);
+ free_percpu(slave_dev->tstats);
+ free_netdev(slave_dev);
+}
+
+int dsa_slave_change_master(struct net_device *dev, struct net_device *master,
+ struct netlink_ext_ack *extack)
+{
+ struct net_device *old_master = dsa_slave_to_master(dev);
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+ struct net_device *upper;
+ struct list_head *iter;
+ int err;
+
+ if (master == old_master)
+ return 0;
+
+ if (!ds->ops->port_change_master) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Driver does not support changing DSA master");
+ return -EOPNOTSUPP;
+ }
+
+ if (!netdev_uses_dsa(master)) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Interface not eligible as DSA master");
+ return -EOPNOTSUPP;
+ }
+
+ netdev_for_each_upper_dev_rcu(master, upper, iter) {
+ if (dsa_slave_dev_check(upper))
+ continue;
+ if (netif_is_bridge_master(upper))
+ continue;
+ NL_SET_ERR_MSG_MOD(extack, "Cannot join master with unknown uppers");
+ return -EOPNOTSUPP;
+ }
+
+ /* Since we allow live-changing the DSA master, plus we auto-open the
+ * DSA master when the user port opens => we need to ensure that the
+ * new DSA master is open too.
+ */
+ if (dev->flags & IFF_UP) {
+ err = dev_open(master, extack);
+ if (err)
+ return err;
+ }
+
+ netdev_upper_dev_unlink(old_master, dev);
+
+ err = netdev_upper_dev_link(master, dev, extack);
+ if (err)
+ goto out_revert_old_master_unlink;
+
+ err = dsa_port_change_master(dp, master, extack);
+ if (err)
+ goto out_revert_master_link;
+
+ /* Update the MTU of the new CPU port through cross-chip notifiers */
+ err = dsa_slave_change_mtu(dev, dev->mtu);
+ if (err && err != -EOPNOTSUPP) {
+ netdev_warn(dev,
+ "nonfatal error updating MTU with new master: %pe\n",
+ ERR_PTR(err));
+ }
+
+ /* If the port doesn't have its own MAC address and relies on the DSA
+ * master's one, inherit it again from the new DSA master.
+ */
+ if (is_zero_ether_addr(dp->mac))
+ eth_hw_addr_inherit(dev, master);
+
+ return 0;
+
+out_revert_master_link:
+ netdev_upper_dev_unlink(master, dev);
+out_revert_old_master_unlink:
+ netdev_upper_dev_link(old_master, dev, NULL);
+ return err;
+}
+
+bool dsa_slave_dev_check(const struct net_device *dev)
+{
+ return dev->netdev_ops == &dsa_slave_netdev_ops;
+}
+EXPORT_SYMBOL_GPL(dsa_slave_dev_check);
+
+static int dsa_slave_changeupper(struct net_device *dev,
+ struct netdev_notifier_changeupper_info *info)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct netlink_ext_ack *extack;
+ int err = NOTIFY_DONE;
+
+ if (!dsa_slave_dev_check(dev))
+ return err;
+
+ extack = netdev_notifier_info_to_extack(&info->info);
+
+ if (netif_is_bridge_master(info->upper_dev)) {
+ if (info->linking) {
+ err = dsa_port_bridge_join(dp, info->upper_dev, extack);
+ if (!err)
+ dsa_bridge_mtu_normalization(dp);
+ if (err == -EOPNOTSUPP) {
+ if (extack && !extack->_msg)
+ NL_SET_ERR_MSG_MOD(extack,
+ "Offloading not supported");
+ err = 0;
+ }
+ err = notifier_from_errno(err);
+ } else {
+ dsa_port_bridge_leave(dp, info->upper_dev);
+ err = NOTIFY_OK;
+ }
+ } else if (netif_is_lag_master(info->upper_dev)) {
+ if (info->linking) {
+ err = dsa_port_lag_join(dp, info->upper_dev,
+ info->upper_info, extack);
+ if (err == -EOPNOTSUPP) {
+ NL_SET_ERR_MSG_MOD(info->info.extack,
+ "Offloading not supported");
+ err = 0;
+ }
+ err = notifier_from_errno(err);
+ } else {
+ dsa_port_lag_leave(dp, info->upper_dev);
+ err = NOTIFY_OK;
+ }
+ } else if (is_hsr_master(info->upper_dev)) {
+ if (info->linking) {
+ err = dsa_port_hsr_join(dp, info->upper_dev);
+ if (err == -EOPNOTSUPP) {
+ NL_SET_ERR_MSG_MOD(info->info.extack,
+ "Offloading not supported");
+ err = 0;
+ }
+ err = notifier_from_errno(err);
+ } else {
+ dsa_port_hsr_leave(dp, info->upper_dev);
+ err = NOTIFY_OK;
+ }
+ }
+
+ return err;
+}
+
+static int dsa_slave_prechangeupper(struct net_device *dev,
+ struct netdev_notifier_changeupper_info *info)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+
+ if (!dsa_slave_dev_check(dev))
+ return NOTIFY_DONE;
+
+ if (netif_is_bridge_master(info->upper_dev) && !info->linking)
+ dsa_port_pre_bridge_leave(dp, info->upper_dev);
+ else if (netif_is_lag_master(info->upper_dev) && !info->linking)
+ dsa_port_pre_lag_leave(dp, info->upper_dev);
+ /* dsa_port_pre_hsr_leave is not yet necessary since hsr cannot be
+ * meaningfully enslaved to a bridge yet
+ */
+
+ return NOTIFY_DONE;
+}
+
+static int
+dsa_slave_lag_changeupper(struct net_device *dev,
+ struct netdev_notifier_changeupper_info *info)
+{
+ struct net_device *lower;
+ struct list_head *iter;
+ int err = NOTIFY_DONE;
+ struct dsa_port *dp;
+
+ if (!netif_is_lag_master(dev))
+ return err;
+
+ netdev_for_each_lower_dev(dev, lower, iter) {
+ if (!dsa_slave_dev_check(lower))
+ continue;
+
+ dp = dsa_slave_to_port(lower);
+ if (!dp->lag)
+ /* Software LAG */
+ continue;
+
+ err = dsa_slave_changeupper(lower, info);
+ if (notifier_to_errno(err))
+ break;
+ }
+
+ return err;
+}
+
+/* Same as dsa_slave_lag_changeupper() except that it calls
+ * dsa_slave_prechangeupper()
+ */
+static int
+dsa_slave_lag_prechangeupper(struct net_device *dev,
+ struct netdev_notifier_changeupper_info *info)
+{
+ struct net_device *lower;
+ struct list_head *iter;
+ int err = NOTIFY_DONE;
+ struct dsa_port *dp;
+
+ if (!netif_is_lag_master(dev))
+ return err;
+
+ netdev_for_each_lower_dev(dev, lower, iter) {
+ if (!dsa_slave_dev_check(lower))
+ continue;
+
+ dp = dsa_slave_to_port(lower);
+ if (!dp->lag)
+ /* Software LAG */
+ continue;
+
+ err = dsa_slave_prechangeupper(lower, info);
+ if (notifier_to_errno(err))
+ break;
+ }
+
+ return err;
+}
+
+static int
+dsa_prevent_bridging_8021q_upper(struct net_device *dev,
+ struct netdev_notifier_changeupper_info *info)
+{
+ struct netlink_ext_ack *ext_ack;
+ struct net_device *slave, *br;
+ struct dsa_port *dp;
+
+ ext_ack = netdev_notifier_info_to_extack(&info->info);
+
+ if (!is_vlan_dev(dev))
+ return NOTIFY_DONE;
+
+ slave = vlan_dev_real_dev(dev);
+ if (!dsa_slave_dev_check(slave))
+ return NOTIFY_DONE;
+
+ dp = dsa_slave_to_port(slave);
+ br = dsa_port_bridge_dev_get(dp);
+ if (!br)
+ return NOTIFY_DONE;
+
+ /* Deny enslaving a VLAN device into a VLAN-aware bridge */
+ if (br_vlan_enabled(br) &&
+ netif_is_bridge_master(info->upper_dev) && info->linking) {
+ NL_SET_ERR_MSG_MOD(ext_ack,
+ "Cannot enslave VLAN device into VLAN aware bridge");
+ return notifier_from_errno(-EINVAL);
+ }
+
+ return NOTIFY_DONE;
+}
+
+static int
+dsa_slave_check_8021q_upper(struct net_device *dev,
+ struct netdev_notifier_changeupper_info *info)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct net_device *br = dsa_port_bridge_dev_get(dp);
+ struct bridge_vlan_info br_info;
+ struct netlink_ext_ack *extack;
+ int err = NOTIFY_DONE;
+ u16 vid;
+
+ if (!br || !br_vlan_enabled(br))
+ return NOTIFY_DONE;
+
+ extack = netdev_notifier_info_to_extack(&info->info);
+ vid = vlan_dev_vlan_id(info->upper_dev);
+
+ /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
+ * device, respectively the VID is not found, returning
+ * 0 means success, which is a failure for us here.
+ */
+ err = br_vlan_get_info(br, vid, &br_info);
+ if (err == 0) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "This VLAN is already configured by the bridge");
+ return notifier_from_errno(-EBUSY);
+ }
+
+ return NOTIFY_DONE;
+}
+
+static int
+dsa_slave_prechangeupper_sanity_check(struct net_device *dev,
+ struct netdev_notifier_changeupper_info *info)
+{
+ struct dsa_switch *ds;
+ struct dsa_port *dp;
+ int err;
+
+ if (!dsa_slave_dev_check(dev))
+ return dsa_prevent_bridging_8021q_upper(dev, info);
+
+ dp = dsa_slave_to_port(dev);
+ ds = dp->ds;
+
+ if (ds->ops->port_prechangeupper) {
+ err = ds->ops->port_prechangeupper(ds, dp->index, info);
+ if (err)
+ return notifier_from_errno(err);
+ }
+
+ if (is_vlan_dev(info->upper_dev))
+ return dsa_slave_check_8021q_upper(dev, info);
+
+ return NOTIFY_DONE;
+}
+
+/* To be eligible as a DSA master, a LAG must have all lower interfaces be
+ * eligible DSA masters. Additionally, all LAG slaves must be DSA masters of
+ * switches in the same switch tree.
+ */
+static int dsa_lag_master_validate(struct net_device *lag_dev,
+ struct netlink_ext_ack *extack)
+{
+ struct net_device *lower1, *lower2;
+ struct list_head *iter1, *iter2;
+
+ netdev_for_each_lower_dev(lag_dev, lower1, iter1) {
+ netdev_for_each_lower_dev(lag_dev, lower2, iter2) {
+ if (!netdev_uses_dsa(lower1) ||
+ !netdev_uses_dsa(lower2)) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "All LAG ports must be eligible as DSA masters");
+ return notifier_from_errno(-EINVAL);
+ }
+
+ if (lower1 == lower2)
+ continue;
+
+ if (!dsa_port_tree_same(lower1->dsa_ptr,
+ lower2->dsa_ptr)) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "LAG contains DSA masters of disjoint switch trees");
+ return notifier_from_errno(-EINVAL);
+ }
+ }
+ }
+
+ return NOTIFY_DONE;
+}
+
+static int
+dsa_master_prechangeupper_sanity_check(struct net_device *master,
+ struct netdev_notifier_changeupper_info *info)
+{
+ struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info);
+
+ if (!netdev_uses_dsa(master))
+ return NOTIFY_DONE;
+
+ if (!info->linking)
+ return NOTIFY_DONE;
+
+ /* Allow DSA switch uppers */
+ if (dsa_slave_dev_check(info->upper_dev))
+ return NOTIFY_DONE;
+
+ /* Allow bridge uppers of DSA masters, subject to further
+ * restrictions in dsa_bridge_prechangelower_sanity_check()
+ */
+ if (netif_is_bridge_master(info->upper_dev))
+ return NOTIFY_DONE;
+
+ /* Allow LAG uppers, subject to further restrictions in
+ * dsa_lag_master_prechangelower_sanity_check()
+ */
+ if (netif_is_lag_master(info->upper_dev))
+ return dsa_lag_master_validate(info->upper_dev, extack);
+
+ NL_SET_ERR_MSG_MOD(extack,
+ "DSA master cannot join unknown upper interfaces");
+ return notifier_from_errno(-EBUSY);
+}
+
+static int
+dsa_lag_master_prechangelower_sanity_check(struct net_device *dev,
+ struct netdev_notifier_changeupper_info *info)
+{
+ struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info);
+ struct net_device *lag_dev = info->upper_dev;
+ struct net_device *lower;
+ struct list_head *iter;
+
+ if (!netdev_uses_dsa(lag_dev) || !netif_is_lag_master(lag_dev))
+ return NOTIFY_DONE;
+
+ if (!info->linking)
+ return NOTIFY_DONE;
+
+ if (!netdev_uses_dsa(dev)) {
+ NL_SET_ERR_MSG(extack,
+ "Only DSA masters can join a LAG DSA master");
+ return notifier_from_errno(-EINVAL);
+ }
+
+ netdev_for_each_lower_dev(lag_dev, lower, iter) {
+ if (!dsa_port_tree_same(dev->dsa_ptr, lower->dsa_ptr)) {
+ NL_SET_ERR_MSG(extack,
+ "Interface is DSA master for a different switch tree than this LAG");
+ return notifier_from_errno(-EINVAL);
+ }
+
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+/* Don't allow bridging of DSA masters, since the bridge layer rx_handler
+ * prevents the DSA fake ethertype handler to be invoked, so we don't get the
+ * chance to strip off and parse the DSA switch tag protocol header (the bridge
+ * layer just returns RX_HANDLER_CONSUMED, stopping RX processing for these
+ * frames).
+ * The only case where that would not be an issue is when bridging can already
+ * be offloaded, such as when the DSA master is itself a DSA or plain switchdev
+ * port, and is bridged only with other ports from the same hardware device.
+ */
+static int
+dsa_bridge_prechangelower_sanity_check(struct net_device *new_lower,
+ struct netdev_notifier_changeupper_info *info)
+{
+ struct net_device *br = info->upper_dev;
+ struct netlink_ext_ack *extack;
+ struct net_device *lower;
+ struct list_head *iter;
+
+ if (!netif_is_bridge_master(br))
+ return NOTIFY_DONE;
+
+ if (!info->linking)
+ return NOTIFY_DONE;
+
+ extack = netdev_notifier_info_to_extack(&info->info);
+
+ netdev_for_each_lower_dev(br, lower, iter) {
+ if (!netdev_uses_dsa(new_lower) && !netdev_uses_dsa(lower))
+ continue;
+
+ if (!netdev_port_same_parent_id(lower, new_lower)) {
+ NL_SET_ERR_MSG(extack,
+ "Cannot do software bridging with a DSA master");
+ return notifier_from_errno(-EINVAL);
+ }
+ }
+
+ return NOTIFY_DONE;
+}
+
+static void dsa_tree_migrate_ports_from_lag_master(struct dsa_switch_tree *dst,
+ struct net_device *lag_dev)
+{
+ struct net_device *new_master = dsa_tree_find_first_master(dst);
+ struct dsa_port *dp;
+ int err;
+
+ dsa_tree_for_each_user_port(dp, dst) {
+ if (dsa_port_to_master(dp) != lag_dev)
+ continue;
+
+ err = dsa_slave_change_master(dp->slave, new_master, NULL);
+ if (err) {
+ netdev_err(dp->slave,
+ "failed to restore master to %s: %pe\n",
+ new_master->name, ERR_PTR(err));
+ }
+ }
+}
+
+static int dsa_master_lag_join(struct net_device *master,
+ struct net_device *lag_dev,
+ struct netdev_lag_upper_info *uinfo,
+ struct netlink_ext_ack *extack)
+{
+ struct dsa_port *cpu_dp = master->dsa_ptr;
+ struct dsa_switch_tree *dst = cpu_dp->dst;
+ struct dsa_port *dp;
+ int err;
+
+ err = dsa_master_lag_setup(lag_dev, cpu_dp, uinfo, extack);
+ if (err)
+ return err;
+
+ dsa_tree_for_each_user_port(dp, dst) {
+ if (dsa_port_to_master(dp) != master)
+ continue;
+
+ err = dsa_slave_change_master(dp->slave, lag_dev, extack);
+ if (err)
+ goto restore;
+ }
+
+ return 0;
+
+restore:
+ dsa_tree_for_each_user_port_continue_reverse(dp, dst) {
+ if (dsa_port_to_master(dp) != lag_dev)
+ continue;
+
+ err = dsa_slave_change_master(dp->slave, master, NULL);
+ if (err) {
+ netdev_err(dp->slave,
+ "failed to restore master to %s: %pe\n",
+ master->name, ERR_PTR(err));
+ }
+ }
+
+ dsa_master_lag_teardown(lag_dev, master->dsa_ptr);
+
+ return err;
+}
+
+static void dsa_master_lag_leave(struct net_device *master,
+ struct net_device *lag_dev)
+{
+ struct dsa_port *dp, *cpu_dp = lag_dev->dsa_ptr;
+ struct dsa_switch_tree *dst = cpu_dp->dst;
+ struct dsa_port *new_cpu_dp = NULL;
+ struct net_device *lower;
+ struct list_head *iter;
+
+ netdev_for_each_lower_dev(lag_dev, lower, iter) {
+ if (netdev_uses_dsa(lower)) {
+ new_cpu_dp = lower->dsa_ptr;
+ break;
+ }
+ }
+
+ if (new_cpu_dp) {
+ /* Update the CPU port of the user ports still under the LAG
+ * so that dsa_port_to_master() continues to work properly
+ */
+ dsa_tree_for_each_user_port(dp, dst)
+ if (dsa_port_to_master(dp) == lag_dev)
+ dp->cpu_dp = new_cpu_dp;
+
+ /* Update the index of the virtual CPU port to match the lowest
+ * physical CPU port
+ */
+ lag_dev->dsa_ptr = new_cpu_dp;
+ wmb();
+ } else {
+ /* If the LAG DSA master has no ports left, migrate back all
+ * user ports to the first physical CPU port
+ */
+ dsa_tree_migrate_ports_from_lag_master(dst, lag_dev);
+ }
+
+ /* This DSA master has left its LAG in any case, so let
+ * the CPU port leave the hardware LAG as well
+ */
+ dsa_master_lag_teardown(lag_dev, master->dsa_ptr);
+}
+
+static int dsa_master_changeupper(struct net_device *dev,
+ struct netdev_notifier_changeupper_info *info)
+{
+ struct netlink_ext_ack *extack;
+ int err = NOTIFY_DONE;
+
+ if (!netdev_uses_dsa(dev))
+ return err;
+
+ extack = netdev_notifier_info_to_extack(&info->info);
+
+ if (netif_is_lag_master(info->upper_dev)) {
+ if (info->linking) {
+ err = dsa_master_lag_join(dev, info->upper_dev,
+ info->upper_info, extack);
+ err = notifier_from_errno(err);
+ } else {
+ dsa_master_lag_leave(dev, info->upper_dev);
+ err = NOTIFY_OK;
+ }
+ }
+
+ return err;
+}
+
+static int dsa_slave_netdevice_event(struct notifier_block *nb,
+ unsigned long event, void *ptr)
+{
+ struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+
+ switch (event) {
+ case NETDEV_PRECHANGEUPPER: {
+ struct netdev_notifier_changeupper_info *info = ptr;
+ int err;
+
+ err = dsa_slave_prechangeupper_sanity_check(dev, info);
+ if (notifier_to_errno(err))
+ return err;
+
+ err = dsa_master_prechangeupper_sanity_check(dev, info);
+ if (notifier_to_errno(err))
+ return err;
+
+ err = dsa_lag_master_prechangelower_sanity_check(dev, info);
+ if (notifier_to_errno(err))
+ return err;
+
+ err = dsa_bridge_prechangelower_sanity_check(dev, info);
+ if (notifier_to_errno(err))
+ return err;
+
+ err = dsa_slave_prechangeupper(dev, ptr);
+ if (notifier_to_errno(err))
+ return err;
+
+ err = dsa_slave_lag_prechangeupper(dev, ptr);
+ if (notifier_to_errno(err))
+ return err;
+
+ break;
+ }
+ case NETDEV_CHANGEUPPER: {
+ int err;
+
+ err = dsa_slave_changeupper(dev, ptr);
+ if (notifier_to_errno(err))
+ return err;
+
+ err = dsa_slave_lag_changeupper(dev, ptr);
+ if (notifier_to_errno(err))
+ return err;
+
+ err = dsa_master_changeupper(dev, ptr);
+ if (notifier_to_errno(err))
+ return err;
+
+ break;
+ }
+ case NETDEV_CHANGELOWERSTATE: {
+ struct netdev_notifier_changelowerstate_info *info = ptr;
+ struct dsa_port *dp;
+ int err = 0;
+
+ if (dsa_slave_dev_check(dev)) {
+ dp = dsa_slave_to_port(dev);
+
+ err = dsa_port_lag_change(dp, info->lower_state_info);
+ }
+
+ /* Mirror LAG port events on DSA masters that are in
+ * a LAG towards their respective switch CPU ports
+ */
+ if (netdev_uses_dsa(dev)) {
+ dp = dev->dsa_ptr;
+
+ err = dsa_port_lag_change(dp, info->lower_state_info);
+ }
+
+ return notifier_from_errno(err);
+ }
+ case NETDEV_CHANGE:
+ case NETDEV_UP: {
+ /* Track state of master port.
+ * DSA driver may require the master port (and indirectly
+ * the tagger) to be available for some special operation.
+ */
+ if (netdev_uses_dsa(dev)) {
+ struct dsa_port *cpu_dp = dev->dsa_ptr;
+ struct dsa_switch_tree *dst = cpu_dp->ds->dst;
+
+ /* Track when the master port is UP */
+ dsa_tree_master_oper_state_change(dst, dev,
+ netif_oper_up(dev));
+
+ /* Track when the master port is ready and can accept
+ * packet.
+ * NETDEV_UP event is not enough to flag a port as ready.
+ * We also have to wait for linkwatch_do_dev to dev_activate
+ * and emit a NETDEV_CHANGE event.
+ * We check if a master port is ready by checking if the dev
+ * have a qdisc assigned and is not noop.
+ */
+ dsa_tree_master_admin_state_change(dst, dev,
+ !qdisc_tx_is_noop(dev));
+
+ return NOTIFY_OK;
+ }
+
+ return NOTIFY_DONE;
+ }
+ case NETDEV_GOING_DOWN: {
+ struct dsa_port *dp, *cpu_dp;
+ struct dsa_switch_tree *dst;
+ LIST_HEAD(close_list);
+
+ if (!netdev_uses_dsa(dev))
+ return NOTIFY_DONE;
+
+ cpu_dp = dev->dsa_ptr;
+ dst = cpu_dp->ds->dst;
+
+ dsa_tree_master_admin_state_change(dst, dev, false);
+
+ list_for_each_entry(dp, &dst->ports, list) {
+ if (!dsa_port_is_user(dp))
+ continue;
+
+ if (dp->cpu_dp != cpu_dp)
+ continue;
+
+ list_add(&dp->slave->close_list, &close_list);
+ }
+
+ dev_close_many(&close_list, true);
+
+ return NOTIFY_OK;
+ }
+ default:
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static void
+dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work)
+{
+ struct switchdev_notifier_fdb_info info = {};
+
+ info.addr = switchdev_work->addr;
+ info.vid = switchdev_work->vid;
+ info.offloaded = true;
+ call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
+ switchdev_work->orig_dev, &info.info, NULL);
+}
+
+static void dsa_slave_switchdev_event_work(struct work_struct *work)
+{
+ struct dsa_switchdev_event_work *switchdev_work =
+ container_of(work, struct dsa_switchdev_event_work, work);
+ const unsigned char *addr = switchdev_work->addr;
+ struct net_device *dev = switchdev_work->dev;
+ u16 vid = switchdev_work->vid;
+ struct dsa_switch *ds;
+ struct dsa_port *dp;
+ int err;
+
+ dp = dsa_slave_to_port(dev);
+ ds = dp->ds;
+
+ switch (switchdev_work->event) {
+ case SWITCHDEV_FDB_ADD_TO_DEVICE:
+ if (switchdev_work->host_addr)
+ err = dsa_port_bridge_host_fdb_add(dp, addr, vid);
+ else if (dp->lag)
+ err = dsa_port_lag_fdb_add(dp, addr, vid);
+ else
+ err = dsa_port_fdb_add(dp, addr, vid);
+ if (err) {
+ dev_err(ds->dev,
+ "port %d failed to add %pM vid %d to fdb: %d\n",
+ dp->index, addr, vid, err);
+ break;
+ }
+ dsa_fdb_offload_notify(switchdev_work);
+ break;
+
+ case SWITCHDEV_FDB_DEL_TO_DEVICE:
+ if (switchdev_work->host_addr)
+ err = dsa_port_bridge_host_fdb_del(dp, addr, vid);
+ else if (dp->lag)
+ err = dsa_port_lag_fdb_del(dp, addr, vid);
+ else
+ err = dsa_port_fdb_del(dp, addr, vid);
+ if (err) {
+ dev_err(ds->dev,
+ "port %d failed to delete %pM vid %d from fdb: %d\n",
+ dp->index, addr, vid, err);
+ }
+
+ break;
+ }
+
+ kfree(switchdev_work);
+}
+
+static bool dsa_foreign_dev_check(const struct net_device *dev,
+ const struct net_device *foreign_dev)
+{
+ const struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch_tree *dst = dp->ds->dst;
+
+ if (netif_is_bridge_master(foreign_dev))
+ return !dsa_tree_offloads_bridge_dev(dst, foreign_dev);
+
+ if (netif_is_bridge_port(foreign_dev))
+ return !dsa_tree_offloads_bridge_port(dst, foreign_dev);
+
+ /* Everything else is foreign */
+ return true;
+}
+
+static int dsa_slave_fdb_event(struct net_device *dev,
+ struct net_device *orig_dev,
+ unsigned long event, const void *ctx,
+ const struct switchdev_notifier_fdb_info *fdb_info)
+{
+ struct dsa_switchdev_event_work *switchdev_work;
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ bool host_addr = fdb_info->is_local;
+ struct dsa_switch *ds = dp->ds;
+
+ if (ctx && ctx != dp)
+ return 0;
+
+ if (!dp->bridge)
+ return 0;
+
+ if (switchdev_fdb_is_dynamically_learned(fdb_info)) {
+ if (dsa_port_offloads_bridge_port(dp, orig_dev))
+ return 0;
+
+ /* FDB entries learned by the software bridge or by foreign
+ * bridge ports should be installed as host addresses only if
+ * the driver requests assisted learning.
+ */
+ if (!ds->assisted_learning_on_cpu_port)
+ return 0;
+ }
+
+ /* Also treat FDB entries on foreign interfaces bridged with us as host
+ * addresses.
+ */
+ if (dsa_foreign_dev_check(dev, orig_dev))
+ host_addr = true;
+
+ /* Check early that we're not doing work in vain.
+ * Host addresses on LAG ports still require regular FDB ops,
+ * since the CPU port isn't in a LAG.
+ */
+ if (dp->lag && !host_addr) {
+ if (!ds->ops->lag_fdb_add || !ds->ops->lag_fdb_del)
+ return -EOPNOTSUPP;
+ } else {
+ if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del)
+ return -EOPNOTSUPP;
+ }
+
+ switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
+ if (!switchdev_work)
+ return -ENOMEM;
+
+ netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n",
+ event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting",
+ orig_dev->name, fdb_info->addr, fdb_info->vid,
+ host_addr ? " as host address" : "");
+
+ INIT_WORK(&switchdev_work->work, dsa_slave_switchdev_event_work);
+ switchdev_work->event = event;
+ switchdev_work->dev = dev;
+ switchdev_work->orig_dev = orig_dev;
+
+ ether_addr_copy(switchdev_work->addr, fdb_info->addr);
+ switchdev_work->vid = fdb_info->vid;
+ switchdev_work->host_addr = host_addr;
+
+ dsa_schedule_work(&switchdev_work->work);
+
+ return 0;
+}
+
+/* Called under rcu_read_lock() */
+static int dsa_slave_switchdev_event(struct notifier_block *unused,
+ unsigned long event, void *ptr)
+{
+ struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
+ int err;
+
+ switch (event) {
+ case SWITCHDEV_PORT_ATTR_SET:
+ err = switchdev_handle_port_attr_set(dev, ptr,
+ dsa_slave_dev_check,
+ dsa_slave_port_attr_set);
+ return notifier_from_errno(err);
+ case SWITCHDEV_FDB_ADD_TO_DEVICE:
+ case SWITCHDEV_FDB_DEL_TO_DEVICE:
+ err = switchdev_handle_fdb_event_to_device(dev, event, ptr,
+ dsa_slave_dev_check,
+ dsa_foreign_dev_check,
+ dsa_slave_fdb_event);
+ return notifier_from_errno(err);
+ default:
+ return NOTIFY_DONE;
+ }
+
+ return NOTIFY_OK;
+}
+
+static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
+ unsigned long event, void *ptr)
+{
+ struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
+ int err;
+
+ switch (event) {
+ case SWITCHDEV_PORT_OBJ_ADD:
+ err = switchdev_handle_port_obj_add_foreign(dev, ptr,
+ dsa_slave_dev_check,
+ dsa_foreign_dev_check,
+ dsa_slave_port_obj_add);
+ return notifier_from_errno(err);
+ case SWITCHDEV_PORT_OBJ_DEL:
+ err = switchdev_handle_port_obj_del_foreign(dev, ptr,
+ dsa_slave_dev_check,
+ dsa_foreign_dev_check,
+ dsa_slave_port_obj_del);
+ return notifier_from_errno(err);
+ case SWITCHDEV_PORT_ATTR_SET:
+ err = switchdev_handle_port_attr_set(dev, ptr,
+ dsa_slave_dev_check,
+ dsa_slave_port_attr_set);
+ return notifier_from_errno(err);
+ }
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block dsa_slave_nb __read_mostly = {
+ .notifier_call = dsa_slave_netdevice_event,
+};
+
+struct notifier_block dsa_slave_switchdev_notifier = {
+ .notifier_call = dsa_slave_switchdev_event,
+};
+
+struct notifier_block dsa_slave_switchdev_blocking_notifier = {
+ .notifier_call = dsa_slave_switchdev_blocking_event,
+};
+
+int dsa_slave_register_notifier(void)
+{
+ struct notifier_block *nb;
+ int err;
+
+ err = register_netdevice_notifier(&dsa_slave_nb);
+ if (err)
+ return err;
+
+ err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
+ if (err)
+ goto err_switchdev_nb;
+
+ nb = &dsa_slave_switchdev_blocking_notifier;
+ err = register_switchdev_blocking_notifier(nb);
+ if (err)
+ goto err_switchdev_blocking_nb;
+
+ return 0;
+
+err_switchdev_blocking_nb:
+ unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
+err_switchdev_nb:
+ unregister_netdevice_notifier(&dsa_slave_nb);
+ return err;
+}
+
+void dsa_slave_unregister_notifier(void)
+{
+ struct notifier_block *nb;
+ int err;
+
+ nb = &dsa_slave_switchdev_blocking_notifier;
+ err = unregister_switchdev_blocking_notifier(nb);
+ if (err)
+ pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
+
+ err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
+ if (err)
+ pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
+
+ err = unregister_netdevice_notifier(&dsa_slave_nb);
+ if (err)
+ pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
+}