v4.19.13 snapshot.
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
new file mode 100644
index 0000000..1c45c1d
--- /dev/null
+++ b/net/dsa/slave.c
@@ -0,0 +1,1569 @@
+/*
+ * net/dsa/slave.c - Slave device handling
+ * Copyright (c) 2008-2009 Marvell Semiconductor
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#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/tc_act/tc_mirred.h>
+#include <linux/if_bridge.h>
+#include <linux/netpoll.h>
+#include <linux/ptp_classify.h>
+
+#include "dsa_priv.h"
+
+static bool dsa_slave_dev_check(struct net_device *dev);
+
+/* 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);
+ int err;
+
+ if (!(master->flags & IFF_UP))
+ return -ENETDOWN;
+
+ if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
+ err = dev_uc_add(master, dev->dev_addr);
+ if (err < 0)
+ goto out;
+ }
+
+ if (dev->flags & IFF_ALLMULTI) {
+ err = dev_set_allmulti(master, 1);
+ if (err < 0)
+ goto del_unicast;
+ }
+ if (dev->flags & IFF_PROMISC) {
+ err = dev_set_promiscuity(master, 1);
+ if (err < 0)
+ goto clear_allmulti;
+ }
+
+ err = dsa_port_enable(dp, dev->phydev);
+ if (err)
+ goto clear_promisc;
+
+ phylink_start(dp->pl);
+
+ return 0;
+
+clear_promisc:
+ if (dev->flags & IFF_PROMISC)
+ dev_set_promiscuity(master, -1);
+clear_allmulti:
+ if (dev->flags & IFF_ALLMULTI)
+ dev_set_allmulti(master, -1);
+del_unicast:
+ if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
+ dev_uc_del(master, dev->dev_addr);
+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);
+
+ phylink_stop(dp->pl);
+
+ dsa_port_disable(dp, dev->phydev);
+
+ dev_mc_unsync(master, dev);
+ dev_uc_unsync(master, dev);
+ if (dev->flags & IFF_ALLMULTI)
+ dev_set_allmulti(master, -1);
+ if (dev->flags & IFF_PROMISC)
+ dev_set_promiscuity(master, -1);
+
+ if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
+ dev_uc_del(master, dev->dev_addr);
+
+ return 0;
+}
+
+static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
+{
+ struct net_device *master = dsa_slave_to_master(dev);
+
+ 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);
+}
+
+static void dsa_slave_set_rx_mode(struct net_device *dev)
+{
+ struct net_device *master = dsa_slave_to_master(dev);
+
+ dev_mc_sync(master, dev);
+ dev_uc_sync(master, dev);
+}
+
+static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
+{
+ struct net_device *master = dsa_slave_to_master(dev);
+ struct sockaddr *addr = a;
+ int err;
+
+ if (!is_valid_ether_addr(addr->sa_data))
+ return -EADDRNOTAVAIL;
+
+ if (!(dev->flags & IFF_UP))
+ goto out;
+
+ if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
+ err = dev_uc_add(master, addr->sa_data);
+ if (err < 0)
+ return err;
+ }
+
+ if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
+ dev_uc_del(master, dev->dev_addr);
+
+out:
+ ether_addr_copy(dev->dev_addr, addr->sa_data);
+
+ return 0;
+}
+
+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 struct switchdev_attr *attr,
+ struct switchdev_trans *trans)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ int ret;
+
+ switch (attr->id) {
+ case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
+ ret = dsa_port_set_state(dp, attr->u.stp_state, trans);
+ break;
+ case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
+ ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
+ trans);
+ break;
+ case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
+ ret = dsa_port_ageing_time(dp, attr->u.ageing_time, trans);
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ break;
+ }
+
+ return ret;
+}
+
+static int dsa_slave_port_obj_add(struct net_device *dev,
+ const struct switchdev_obj *obj,
+ struct switchdev_trans *trans)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ int err;
+
+ /* For the prepare phase, ensure the full set of changes is feasable in
+ * one go in order to signal a failure properly. If an operation is not
+ * supported, return -EOPNOTSUPP.
+ */
+
+ switch (obj->id) {
+ case SWITCHDEV_OBJ_ID_PORT_MDB:
+ err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans);
+ break;
+ case SWITCHDEV_OBJ_ID_HOST_MDB:
+ /* DSA can directly translate this to a normal MDB add,
+ * but on the CPU port.
+ */
+ err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj),
+ trans);
+ break;
+ case SWITCHDEV_OBJ_ID_PORT_VLAN:
+ err = dsa_port_vlan_add(dp, SWITCHDEV_OBJ_PORT_VLAN(obj),
+ trans);
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ break;
+ }
+
+ return err;
+}
+
+static int dsa_slave_port_obj_del(struct net_device *dev,
+ const struct switchdev_obj *obj)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ int err;
+
+ switch (obj->id) {
+ case SWITCHDEV_OBJ_ID_PORT_MDB:
+ err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
+ break;
+ case SWITCHDEV_OBJ_ID_HOST_MDB:
+ /* DSA can directly translate this to a normal MDB add,
+ * but on the CPU port.
+ */
+ err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj));
+ break;
+ case SWITCHDEV_OBJ_ID_PORT_VLAN:
+ err = dsa_port_vlan_del(dp, SWITCHDEV_OBJ_PORT_VLAN(obj));
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ break;
+ }
+
+ return err;
+}
+
+static int dsa_slave_port_attr_get(struct net_device *dev,
+ struct switchdev_attr *attr)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+ struct dsa_switch_tree *dst = ds->dst;
+
+ switch (attr->id) {
+ case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
+ attr->u.ppid.id_len = sizeof(dst->index);
+ memcpy(&attr->u.ppid.id, &dst->index, attr->u.ppid.id_len);
+ break;
+ case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT:
+ attr->u.brport_flags_support = 0;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+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);
+
+ if (p->netpoll)
+ netpoll_send_skb(p->netpoll, skb);
+#else
+ BUG();
+#endif
+ return NETDEV_TX_OK;
+}
+
+static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
+ struct sk_buff *skb)
+{
+ struct dsa_switch *ds = p->dp->ds;
+ struct sk_buff *clone;
+ unsigned int type;
+
+ type = ptp_classify_raw(skb);
+ if (type == PTP_CLASS_NONE)
+ return;
+
+ if (!ds->ops->port_txtstamp)
+ return;
+
+ clone = skb_clone_sk(skb);
+ if (!clone)
+ return;
+
+ if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type))
+ return;
+
+ kfree_skb(clone);
+}
+
+static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct pcpu_sw_netstats *s;
+ struct sk_buff *nskb;
+
+ s = this_cpu_ptr(p->stats64);
+ u64_stats_update_begin(&s->syncp);
+ s->tx_packets++;
+ s->tx_bytes += skb->len;
+ u64_stats_update_end(&s->syncp);
+
+ /* Identify PTP protocol packets, clone them, and pass them to the
+ * switch driver
+ */
+ dsa_skb_tx_timestamp(p, 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;
+ }
+
+ /* 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, nskb);
+
+ /* Queue the SKB for transmission on the parent interface, but
+ * do not modify its EtherType
+ */
+ nskb->dev = dsa_slave_to_master(dev);
+ dev_queue_xmit(nskb);
+
+ return NETDEV_TX_OK;
+}
+
+/* ethtool operations *******************************************************/
+
+static void dsa_slave_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *drvinfo)
+{
+ strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
+ strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
+ strlcpy(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);
+ }
+}
+
+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_slave_priv *p = netdev_priv(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(p->stats64, i);
+ do {
+ start = u64_stats_fetch_begin_irq(&s->syncp);
+ tx_packets = s->tx_packets;
+ tx_bytes = s->tx_bytes;
+ rx_packets = s->rx_packets;
+ rx_bytes = 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;
+
+ count = 4;
+ if (ds->ops->get_sset_count)
+ count += ds->ops->get_sset_count(ds, dp->index, sset);
+
+ return count;
+ }
+
+ return -EOPNOTSUPP;
+}
+
+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);
+}
+
+#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_async(netpoll);
+}
+
+static void dsa_slave_poll_controller(struct net_device *dev)
+{
+}
+#endif
+
+static int dsa_slave_get_phys_port_name(struct net_device *dev,
+ char *name, size_t len)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+
+ if (snprintf(name, len, "p%d", dp->index) >= len)
+ return -EINVAL;
+
+ return 0;
+}
+
+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(struct net_device *dev,
+ struct tc_cls_matchall_offload *cls,
+ bool ingress)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct dsa_mall_tc_entry *mall_tc_entry;
+ __be16 protocol = cls->common.protocol;
+ struct dsa_switch *ds = dp->ds;
+ struct net_device *to_dev;
+ const struct tc_action *a;
+ struct dsa_port *to_dp;
+ int err = -EOPNOTSUPP;
+
+ if (!ds->ops->port_mirror_add)
+ return err;
+
+ if (!tcf_exts_has_one_action(cls->exts))
+ return err;
+
+ a = tcf_exts_first_action(cls->exts);
+
+ if (is_tcf_mirred_egress_mirror(a) && protocol == htons(ETH_P_ALL)) {
+ struct dsa_mall_mirror_tc_entry *mirror;
+
+ to_dev = tcf_mirred_dev(a);
+ if (!to_dev)
+ return -EINVAL;
+
+ if (!dsa_slave_dev_check(to_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(to_dev);
+
+ mirror->to_local_port = to_dp->index;
+ mirror->ingress = ingress;
+
+ err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
+ if (err) {
+ kfree(mall_tc_entry);
+ return err;
+ }
+
+ list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
+ }
+
+ return 0;
+}
+
+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;
+
+ if (!ds->ops->port_mirror_del)
+ return;
+
+ 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:
+ ds->ops->port_mirror_del(ds, dp->index, &mall_tc_entry->mirror);
+ 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_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);
+ 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 int dsa_slave_setup_tc_block(struct net_device *dev,
+ struct tc_block_offload *f)
+{
+ tc_setup_cb_t *cb;
+
+ if (f->binder_type == TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
+ cb = dsa_slave_setup_tc_block_cb_ig;
+ else if (f->binder_type == TCF_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
+ cb = dsa_slave_setup_tc_block_cb_eg;
+ else
+ return -EOPNOTSUPP;
+
+ switch (f->command) {
+ case TC_BLOCK_BIND:
+ return tcf_block_cb_register(f->block, cb, dev, dev, f->extack);
+ case TC_BLOCK_UNBIND:
+ tcf_block_cb_unregister(f->block, cb, dev);
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
+ void *type_data)
+{
+ switch (type) {
+ case TC_SETUP_BLOCK:
+ return dsa_slave_setup_tc_block(dev, type_data);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static void dsa_slave_get_stats64(struct net_device *dev,
+ struct rtnl_link_stats64 *stats)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct pcpu_sw_netstats *s;
+ unsigned int start;
+ int i;
+
+ netdev_stats_to_stats64(stats, &dev->stats);
+ for_each_possible_cpu(i) {
+ u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
+
+ s = per_cpu_ptr(p->stats64, i);
+ do {
+ start = u64_stats_fetch_begin_irq(&s->syncp);
+ tx_packets = s->tx_packets;
+ tx_bytes = s->tx_bytes;
+ rx_packets = s->rx_packets;
+ rx_bytes = s->rx_bytes;
+ } while (u64_stats_fetch_retry_irq(&s->syncp, start));
+
+ stats->tx_packets += tx_packets;
+ stats->tx_bytes += tx_bytes;
+ stats->rx_packets += rx_packets;
+ stats->rx_bytes += rx_bytes;
+ }
+}
+
+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 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,
+ .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_rxnfc = dsa_slave_get_rxnfc,
+ .set_rxnfc = dsa_slave_set_rxnfc,
+ .get_ts_info = dsa_slave_get_ts_info,
+};
+
+/* legacy way, bypassing the bridge *****************************************/
+int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
+ struct net_device *dev,
+ const unsigned char *addr, u16 vid,
+ u16 flags)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+
+ return dsa_port_fdb_add(dp, addr, vid);
+}
+
+int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
+ struct net_device *dev,
+ const unsigned char *addr, u16 vid)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+
+ return dsa_port_fdb_del(dp, addr, vid);
+}
+
+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_add = dsa_legacy_fdb_add,
+ .ndo_fdb_del = dsa_legacy_fdb_del,
+ .ndo_fdb_dump = dsa_slave_fdb_dump,
+ .ndo_do_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_get_phys_port_name = dsa_slave_get_phys_port_name,
+ .ndo_setup_tc = dsa_slave_setup_tc,
+ .ndo_get_stats64 = dsa_slave_get_stats64,
+};
+
+static const struct switchdev_ops dsa_slave_switchdev_ops = {
+ .switchdev_port_attr_get = dsa_slave_port_attr_get,
+ .switchdev_port_attr_set = dsa_slave_port_attr_set,
+ .switchdev_port_obj_add = dsa_slave_port_obj_add,
+ .switchdev_port_obj_del = dsa_slave_port_obj_del,
+};
+
+static struct device_type dsa_type = {
+ .name = "dsa",
+};
+
+static void dsa_slave_phylink_validate(struct net_device *dev,
+ unsigned long *supported,
+ struct phylink_link_state *state)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->phylink_validate)
+ return;
+
+ ds->ops->phylink_validate(ds, dp->index, supported, state);
+}
+
+static int dsa_slave_phylink_mac_link_state(struct net_device *dev,
+ struct phylink_link_state *state)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ /* Only called for SGMII and 802.3z */
+ if (!ds->ops->phylink_mac_link_state)
+ return -EOPNOTSUPP;
+
+ return ds->ops->phylink_mac_link_state(ds, dp->index, state);
+}
+
+static void dsa_slave_phylink_mac_config(struct net_device *dev,
+ unsigned int mode,
+ const struct phylink_link_state *state)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->phylink_mac_config)
+ return;
+
+ ds->ops->phylink_mac_config(ds, dp->index, mode, state);
+}
+
+static void dsa_slave_phylink_mac_an_restart(struct net_device *dev)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->phylink_mac_an_restart)
+ return;
+
+ ds->ops->phylink_mac_an_restart(ds, dp->index);
+}
+
+static void dsa_slave_phylink_mac_link_down(struct net_device *dev,
+ unsigned int mode,
+ phy_interface_t interface)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->phylink_mac_link_down) {
+ if (ds->ops->adjust_link && dev->phydev)
+ ds->ops->adjust_link(ds, dp->index, dev->phydev);
+ return;
+ }
+
+ ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface);
+}
+
+static void dsa_slave_phylink_mac_link_up(struct net_device *dev,
+ unsigned int mode,
+ phy_interface_t interface,
+ struct phy_device *phydev)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->phylink_mac_link_up) {
+ if (ds->ops->adjust_link && dev->phydev)
+ ds->ops->adjust_link(ds, dp->index, dev->phydev);
+ return;
+ }
+
+ ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev);
+}
+
+static const struct phylink_mac_ops dsa_slave_phylink_mac_ops = {
+ .validate = dsa_slave_phylink_validate,
+ .mac_link_state = dsa_slave_phylink_mac_link_state,
+ .mac_config = dsa_slave_phylink_mac_config,
+ .mac_an_restart = dsa_slave_phylink_mac_an_restart,
+ .mac_link_down = dsa_slave_phylink_mac_link_down,
+ .mac_link_up = dsa_slave_phylink_mac_link_up,
+};
+
+void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
+{
+ const struct dsa_port *dp = dsa_to_port(ds, port);
+
+ phylink_mac_change(dp->pl, up);
+}
+EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
+
+static void dsa_slave_phylink_fixed_state(struct net_device *dev,
+ struct phylink_link_state *state)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ 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)
+{
+ 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;
+ }
+
+ 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 mode, ret;
+
+ mode = of_get_phy_mode(port_dn);
+ if (mode < 0)
+ mode = PHY_INTERFACE_MODE_NA;
+
+ dp->pl = phylink_create(slave_dev, of_fwnode_handle(port_dn), mode,
+ &dsa_slave_phylink_mac_ops);
+ if (IS_ERR(dp->pl)) {
+ netdev_err(slave_dev,
+ "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
+ return PTR_ERR(dp->pl);
+ }
+
+ /* Register only if the switch provides such a callback, since this
+ * callback takes precedence over polling the link GPIO in PHYLINK
+ * (see phylink_get_fixed_state).
+ */
+ if (ds->ops->phylink_fixed_state)
+ phylink_fixed_state_cb(dp->pl, dsa_slave_phylink_fixed_state);
+
+ 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) {
+ /* We could not connect to a designated PHY or SFP, so use the
+ * switch internal MDIO bus instead
+ */
+ ret = dsa_slave_phy_connect(slave_dev, dp->index);
+ if (ret) {
+ netdev_err(slave_dev,
+ "failed to connect to port %d: %d\n",
+ dp->index, ret);
+ phylink_destroy(dp->pl);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
+static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
+ struct netdev_queue *txq,
+ void *_unused)
+{
+ lockdep_set_class(&txq->_xmit_lock,
+ &dsa_slave_netdev_xmit_lock_key);
+}
+
+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;
+}
+
+static void dsa_slave_notify(struct net_device *dev, unsigned long val)
+{
+ struct net_device *master = dsa_slave_to_master(dev);
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_notifier_register_info rinfo = {
+ .switch_number = dp->ds->index,
+ .port_number = dp->index,
+ .master = master,
+ .info.dev = dev,
+ };
+
+ call_dsa_notifiers(val, dev, &rinfo.info);
+}
+
+int dsa_slave_create(struct dsa_port *port)
+{
+ const struct dsa_port *cpu_dp = port->cpu_dp;
+ struct net_device *master = cpu_dp->master;
+ 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->features = master->vlan_features | NETIF_F_HW_TC;
+ slave_dev->hw_features |= NETIF_F_HW_TC;
+ slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
+ eth_hw_addr_inherit(slave_dev, master);
+ slave_dev->priv_flags |= IFF_NO_QUEUE;
+ slave_dev->netdev_ops = &dsa_slave_netdev_ops;
+ slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
+ slave_dev->min_mtu = 0;
+ slave_dev->max_mtu = ETH_MAX_MTU;
+ SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
+
+ netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
+ NULL);
+
+ 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);
+ p->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
+ if (!p->stats64) {
+ free_netdev(slave_dev);
+ return -ENOMEM;
+ }
+ p->dp = port;
+ INIT_LIST_HEAD(&p->mall_tc_list);
+ p->xmit = cpu_dp->tag_ops->xmit;
+ port->slave = slave_dev;
+
+ netif_carrier_off(slave_dev);
+
+ ret = dsa_slave_phy_setup(slave_dev);
+ if (ret) {
+ netdev_err(master, "error %d setting up slave phy\n", ret);
+ goto out_free;
+ }
+
+ dsa_slave_notify(slave_dev, DSA_PORT_REGISTER);
+
+ ret = register_netdev(slave_dev);
+ if (ret) {
+ netdev_err(master, "error %d registering interface %s\n",
+ ret, slave_dev->name);
+ goto out_phy;
+ }
+
+ return 0;
+
+out_phy:
+ rtnl_lock();
+ phylink_disconnect_phy(p->dp->pl);
+ rtnl_unlock();
+ phylink_destroy(p->dp->pl);
+out_free:
+ free_percpu(p->stats64);
+ free_netdev(slave_dev);
+ port->slave = NULL;
+ return ret;
+}
+
+void dsa_slave_destroy(struct net_device *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();
+ phylink_disconnect_phy(dp->pl);
+ rtnl_unlock();
+
+ dsa_slave_notify(slave_dev, DSA_PORT_UNREGISTER);
+ unregister_netdev(slave_dev);
+ phylink_destroy(dp->pl);
+ free_percpu(p->stats64);
+ free_netdev(slave_dev);
+}
+
+static bool dsa_slave_dev_check(struct net_device *dev)
+{
+ return dev->netdev_ops == &dsa_slave_netdev_ops;
+}
+
+static int dsa_slave_changeupper(struct net_device *dev,
+ struct netdev_notifier_changeupper_info *info)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ int err = NOTIFY_DONE;
+
+ if (netif_is_bridge_master(info->upper_dev)) {
+ if (info->linking) {
+ err = dsa_port_bridge_join(dp, info->upper_dev);
+ err = notifier_from_errno(err);
+ } else {
+ dsa_port_bridge_leave(dp, 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);
+
+ if (!dsa_slave_dev_check(dev))
+ return NOTIFY_DONE;
+
+ if (event == NETDEV_CHANGEUPPER)
+ return dsa_slave_changeupper(dev, ptr);
+
+ return NOTIFY_DONE;
+}
+
+struct dsa_switchdev_event_work {
+ struct work_struct work;
+ struct switchdev_notifier_fdb_info fdb_info;
+ struct net_device *dev;
+ unsigned long event;
+};
+
+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);
+ struct net_device *dev = switchdev_work->dev;
+ struct switchdev_notifier_fdb_info *fdb_info;
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ int err;
+
+ rtnl_lock();
+ switch (switchdev_work->event) {
+ case SWITCHDEV_FDB_ADD_TO_DEVICE:
+ fdb_info = &switchdev_work->fdb_info;
+ if (!fdb_info->added_by_user)
+ break;
+
+ err = dsa_port_fdb_add(dp, fdb_info->addr, fdb_info->vid);
+ if (err) {
+ netdev_dbg(dev, "fdb add failed err=%d\n", err);
+ break;
+ }
+ call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, dev,
+ &fdb_info->info);
+ break;
+
+ case SWITCHDEV_FDB_DEL_TO_DEVICE:
+ fdb_info = &switchdev_work->fdb_info;
+ if (!fdb_info->added_by_user)
+ break;
+
+ err = dsa_port_fdb_del(dp, fdb_info->addr, fdb_info->vid);
+ if (err) {
+ netdev_dbg(dev, "fdb del failed err=%d\n", err);
+ dev_close(dev);
+ }
+ break;
+ }
+ rtnl_unlock();
+
+ kfree(switchdev_work->fdb_info.addr);
+ kfree(switchdev_work);
+ dev_put(dev);
+}
+
+static int
+dsa_slave_switchdev_fdb_work_init(struct dsa_switchdev_event_work *
+ switchdev_work,
+ const struct switchdev_notifier_fdb_info *
+ fdb_info)
+{
+ memcpy(&switchdev_work->fdb_info, fdb_info,
+ sizeof(switchdev_work->fdb_info));
+ switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
+ if (!switchdev_work->fdb_info.addr)
+ return -ENOMEM;
+ ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
+ fdb_info->addr);
+ 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);
+ struct dsa_switchdev_event_work *switchdev_work;
+
+ if (!dsa_slave_dev_check(dev))
+ return NOTIFY_DONE;
+
+ switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
+ if (!switchdev_work)
+ return NOTIFY_BAD;
+
+ INIT_WORK(&switchdev_work->work,
+ dsa_slave_switchdev_event_work);
+ switchdev_work->dev = dev;
+ switchdev_work->event = event;
+
+ switch (event) {
+ case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */
+ case SWITCHDEV_FDB_DEL_TO_DEVICE:
+ if (dsa_slave_switchdev_fdb_work_init(switchdev_work, ptr))
+ goto err_fdb_work_init;
+ dev_hold(dev);
+ break;
+ default:
+ kfree(switchdev_work);
+ return NOTIFY_DONE;
+ }
+
+ dsa_schedule_work(&switchdev_work->work);
+ return NOTIFY_OK;
+
+err_fdb_work_init:
+ kfree(switchdev_work);
+ return NOTIFY_BAD;
+}
+
+static struct notifier_block dsa_slave_nb __read_mostly = {
+ .notifier_call = dsa_slave_netdevice_event,
+};
+
+static struct notifier_block dsa_slave_switchdev_notifier = {
+ .notifier_call = dsa_slave_switchdev_event,
+};
+
+int dsa_slave_register_notifier(void)
+{
+ 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;
+
+ return 0;
+
+err_switchdev_nb:
+ unregister_netdevice_notifier(&dsa_slave_nb);
+ return err;
+}
+
+void dsa_slave_unregister_notifier(void)
+{
+ int 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);
+}