1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * net/dsa/slave.c - Slave device handling
4 * Copyright (c) 2008-2009 Marvell Semiconductor
7 #include <linux/list.h>
8 #include <linux/etherdevice.h>
9 #include <linux/netdevice.h>
10 #include <linux/phy.h>
11 #include <linux/phy_fixed.h>
12 #include <linux/phylink.h>
13 #include <linux/of_net.h>
14 #include <linux/of_mdio.h>
15 #include <linux/mdio.h>
16 #include <net/rtnetlink.h>
17 #include <net/pkt_cls.h>
18 #include <net/selftests.h>
19 #include <net/tc_act/tc_mirred.h>
20 #include <linux/if_bridge.h>
21 #include <linux/if_hsr.h>
22 #include <linux/netpoll.h>
26 /* slave mii_bus handling ***************************************************/
27 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
29 struct dsa_switch *ds = bus->priv;
31 if (ds->phys_mii_mask & (1 << addr))
32 return ds->ops->phy_read(ds, addr, reg);
37 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
39 struct dsa_switch *ds = bus->priv;
41 if (ds->phys_mii_mask & (1 << addr))
42 return ds->ops->phy_write(ds, addr, reg, val);
47 void dsa_slave_mii_bus_init(struct dsa_switch *ds)
49 ds->slave_mii_bus->priv = (void *)ds;
50 ds->slave_mii_bus->name = "dsa slave smi";
51 ds->slave_mii_bus->read = dsa_slave_phy_read;
52 ds->slave_mii_bus->write = dsa_slave_phy_write;
53 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
54 ds->dst->index, ds->index);
55 ds->slave_mii_bus->parent = ds->dev;
56 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
60 /* slave device handling ****************************************************/
61 static int dsa_slave_get_iflink(const struct net_device *dev)
63 return dsa_slave_to_master(dev)->ifindex;
66 static int dsa_slave_open(struct net_device *dev)
68 struct net_device *master = dsa_slave_to_master(dev);
69 struct dsa_port *dp = dsa_slave_to_port(dev);
72 err = dev_open(master, NULL);
74 netdev_err(dev, "failed to open master %s\n", master->name);
78 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
79 err = dev_uc_add(master, dev->dev_addr);
84 if (dev->flags & IFF_ALLMULTI) {
85 err = dev_set_allmulti(master, 1);
89 if (dev->flags & IFF_PROMISC) {
90 err = dev_set_promiscuity(master, 1);
95 err = dsa_port_enable_rt(dp, dev->phydev);
102 if (dev->flags & IFF_PROMISC)
103 dev_set_promiscuity(master, -1);
105 if (dev->flags & IFF_ALLMULTI)
106 dev_set_allmulti(master, -1);
108 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
109 dev_uc_del(master, dev->dev_addr);
114 static int dsa_slave_close(struct net_device *dev)
116 struct net_device *master = dsa_slave_to_master(dev);
117 struct dsa_port *dp = dsa_slave_to_port(dev);
119 dsa_port_disable_rt(dp);
121 dev_mc_unsync(master, dev);
122 dev_uc_unsync(master, dev);
123 if (dev->flags & IFF_ALLMULTI)
124 dev_set_allmulti(master, -1);
125 if (dev->flags & IFF_PROMISC)
126 dev_set_promiscuity(master, -1);
128 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
129 dev_uc_del(master, dev->dev_addr);
134 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
136 struct net_device *master = dsa_slave_to_master(dev);
137 if (dev->flags & IFF_UP) {
138 if (change & IFF_ALLMULTI)
139 dev_set_allmulti(master,
140 dev->flags & IFF_ALLMULTI ? 1 : -1);
141 if (change & IFF_PROMISC)
142 dev_set_promiscuity(master,
143 dev->flags & IFF_PROMISC ? 1 : -1);
147 static void dsa_slave_set_rx_mode(struct net_device *dev)
149 struct net_device *master = dsa_slave_to_master(dev);
151 dev_mc_sync(master, dev);
152 dev_uc_sync(master, dev);
155 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
157 struct net_device *master = dsa_slave_to_master(dev);
158 struct sockaddr *addr = a;
161 if (!is_valid_ether_addr(addr->sa_data))
162 return -EADDRNOTAVAIL;
164 if (!(dev->flags & IFF_UP))
167 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
168 err = dev_uc_add(master, addr->sa_data);
173 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
174 dev_uc_del(master, dev->dev_addr);
177 ether_addr_copy(dev->dev_addr, addr->sa_data);
182 struct dsa_slave_dump_ctx {
183 struct net_device *dev;
185 struct netlink_callback *cb;
190 dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid,
191 bool is_static, void *data)
193 struct dsa_slave_dump_ctx *dump = data;
194 u32 portid = NETLINK_CB(dump->cb->skb).portid;
195 u32 seq = dump->cb->nlh->nlmsg_seq;
196 struct nlmsghdr *nlh;
199 if (dump->idx < dump->cb->args[2])
202 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
203 sizeof(*ndm), NLM_F_MULTI);
207 ndm = nlmsg_data(nlh);
208 ndm->ndm_family = AF_BRIDGE;
211 ndm->ndm_flags = NTF_SELF;
213 ndm->ndm_ifindex = dump->dev->ifindex;
214 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
216 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
217 goto nla_put_failure;
219 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
220 goto nla_put_failure;
222 nlmsg_end(dump->skb, nlh);
229 nlmsg_cancel(dump->skb, nlh);
234 dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
235 struct net_device *dev, struct net_device *filter_dev,
238 struct dsa_port *dp = dsa_slave_to_port(dev);
239 struct dsa_slave_dump_ctx dump = {
247 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump);
253 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
255 struct dsa_slave_priv *p = netdev_priv(dev);
256 struct dsa_switch *ds = p->dp->ds;
257 int port = p->dp->index;
259 /* Pass through to switch driver if it supports timestamping */
262 if (ds->ops->port_hwtstamp_get)
263 return ds->ops->port_hwtstamp_get(ds, port, ifr);
266 if (ds->ops->port_hwtstamp_set)
267 return ds->ops->port_hwtstamp_set(ds, port, ifr);
271 return phylink_mii_ioctl(p->dp->pl, ifr, cmd);
274 static int dsa_slave_port_attr_set(struct net_device *dev,
275 const struct switchdev_attr *attr,
276 struct netlink_ext_ack *extack)
278 struct dsa_port *dp = dsa_slave_to_port(dev);
282 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
283 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
286 ret = dsa_port_set_state(dp, attr->u.stp_state);
288 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
289 if (!dsa_port_offloads_bridge(dp, attr->orig_dev))
292 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
295 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
296 if (!dsa_port_offloads_bridge(dp, attr->orig_dev))
299 ret = dsa_port_ageing_time(dp, attr->u.ageing_time);
301 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
302 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
305 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags,
308 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
309 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
312 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack);
314 case SWITCHDEV_ATTR_ID_BRIDGE_MROUTER:
315 if (!dsa_port_offloads_bridge(dp, attr->orig_dev))
318 ret = dsa_port_mrouter(dp->cpu_dp, attr->u.mrouter, extack);
328 /* Must be called under rcu_read_lock() */
330 dsa_slave_vlan_check_for_8021q_uppers(struct net_device *slave,
331 const struct switchdev_obj_port_vlan *vlan)
333 struct net_device *upper_dev;
334 struct list_head *iter;
336 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) {
339 if (!is_vlan_dev(upper_dev))
342 vid = vlan_dev_vlan_id(upper_dev);
343 if (vid == vlan->vid)
350 static int dsa_slave_vlan_add(struct net_device *dev,
351 const struct switchdev_obj *obj,
352 struct netlink_ext_ack *extack)
354 struct net_device *master = dsa_slave_to_master(dev);
355 struct dsa_port *dp = dsa_slave_to_port(dev);
356 struct switchdev_obj_port_vlan vlan;
359 if (dsa_port_skip_vlan_configuration(dp)) {
360 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN");
364 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj);
366 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with
369 if (br_vlan_enabled(dp->bridge_dev)) {
371 err = dsa_slave_vlan_check_for_8021q_uppers(dev, &vlan);
374 NL_SET_ERR_MSG_MOD(extack,
375 "Port already has a VLAN upper with this VID");
380 err = dsa_port_vlan_add(dp, &vlan, extack);
384 /* We need the dedicated CPU port to be a member of the VLAN as well.
385 * Even though drivers often handle CPU membership in special ways,
386 * it doesn't make sense to program a PVID, so clear this flag.
388 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID;
390 err = dsa_port_vlan_add(dp->cpu_dp, &vlan, extack);
394 return vlan_vid_add(master, htons(ETH_P_8021Q), vlan.vid);
397 static int dsa_slave_port_obj_add(struct net_device *dev,
398 const struct switchdev_obj *obj,
399 struct netlink_ext_ack *extack)
401 struct dsa_port *dp = dsa_slave_to_port(dev);
405 case SWITCHDEV_OBJ_ID_PORT_MDB:
406 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
409 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
411 case SWITCHDEV_OBJ_ID_HOST_MDB:
412 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
415 /* DSA can directly translate this to a normal MDB add,
416 * but on the CPU port.
418 err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj));
420 case SWITCHDEV_OBJ_ID_PORT_VLAN:
421 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
424 err = dsa_slave_vlan_add(dev, obj, extack);
426 case SWITCHDEV_OBJ_ID_MRP:
427 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
430 err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj));
432 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
433 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
436 err = dsa_port_mrp_add_ring_role(dp,
437 SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
447 static int dsa_slave_vlan_del(struct net_device *dev,
448 const struct switchdev_obj *obj)
450 struct net_device *master = dsa_slave_to_master(dev);
451 struct dsa_port *dp = dsa_slave_to_port(dev);
452 struct switchdev_obj_port_vlan *vlan;
455 if (dsa_port_skip_vlan_configuration(dp))
458 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
460 /* Do not deprogram the CPU port as it may be shared with other user
461 * ports which can be members of this VLAN as well.
463 err = dsa_port_vlan_del(dp, vlan);
467 vlan_vid_del(master, htons(ETH_P_8021Q), vlan->vid);
472 static int dsa_slave_port_obj_del(struct net_device *dev,
473 const struct switchdev_obj *obj)
475 struct dsa_port *dp = dsa_slave_to_port(dev);
479 case SWITCHDEV_OBJ_ID_PORT_MDB:
480 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
483 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
485 case SWITCHDEV_OBJ_ID_HOST_MDB:
486 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
489 /* DSA can directly translate this to a normal MDB add,
490 * but on the CPU port.
492 err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj));
494 case SWITCHDEV_OBJ_ID_PORT_VLAN:
495 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
498 err = dsa_slave_vlan_del(dev, obj);
500 case SWITCHDEV_OBJ_ID_MRP:
501 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
504 err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj));
506 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
507 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
510 err = dsa_port_mrp_del_ring_role(dp,
511 SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
521 static int dsa_slave_get_port_parent_id(struct net_device *dev,
522 struct netdev_phys_item_id *ppid)
524 struct dsa_port *dp = dsa_slave_to_port(dev);
525 struct dsa_switch *ds = dp->ds;
526 struct dsa_switch_tree *dst = ds->dst;
528 /* For non-legacy ports, devlink is used and it takes
529 * care of the name generation. This ndo implementation
530 * should be removed with legacy support.
535 ppid->id_len = sizeof(dst->index);
536 memcpy(&ppid->id, &dst->index, ppid->id_len);
541 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
544 #ifdef CONFIG_NET_POLL_CONTROLLER
545 struct dsa_slave_priv *p = netdev_priv(dev);
547 return netpoll_send_skb(p->netpoll, skb);
554 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
557 struct dsa_switch *ds = p->dp->ds;
559 if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))
562 if (!ds->ops->port_txtstamp)
565 ds->ops->port_txtstamp(ds, p->dp->index, skb);
568 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
570 /* SKB for netpoll still need to be mangled with the protocol-specific
571 * tag to be successfully transmitted
573 if (unlikely(netpoll_tx_running(dev)))
574 return dsa_slave_netpoll_send_skb(dev, skb);
576 /* Queue the SKB for transmission on the parent interface, but
577 * do not modify its EtherType
579 skb->dev = dsa_slave_to_master(dev);
584 EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
586 static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev)
588 int needed_headroom = dev->needed_headroom;
589 int needed_tailroom = dev->needed_tailroom;
591 /* For tail taggers, we need to pad short frames ourselves, to ensure
592 * that the tail tag does not fail at its role of being at the end of
593 * the packet, once the master interface pads the frame. Account for
594 * that pad length here, and pad later.
596 if (unlikely(needed_tailroom && skb->len < ETH_ZLEN))
597 needed_tailroom += ETH_ZLEN - skb->len;
598 /* skb_headroom() returns unsigned int... */
599 needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0);
600 needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0);
602 if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb)))
603 /* No reallocation needed, yay! */
606 return pskb_expand_head(skb, needed_headroom, needed_tailroom,
610 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
612 struct dsa_slave_priv *p = netdev_priv(dev);
613 struct sk_buff *nskb;
615 dev_sw_netstats_tx_add(dev, 1, skb->len);
617 memset(skb->cb, 0, sizeof(skb->cb));
619 /* Handle tx timestamp if any */
620 dsa_skb_tx_timestamp(p, skb);
622 if (dsa_realloc_skb(skb, dev)) {
623 dev_kfree_skb_any(skb);
627 /* needed_tailroom should still be 'warm' in the cache line from
628 * dsa_realloc_skb(), which has also ensured that padding is safe.
630 if (dev->needed_tailroom)
633 /* Transmit function may have to reallocate the original SKB,
634 * in which case it must have freed it. Only free it here on error.
636 nskb = p->xmit(skb, dev);
642 return dsa_enqueue_skb(nskb, dev);
645 /* ethtool operations *******************************************************/
647 static void dsa_slave_get_drvinfo(struct net_device *dev,
648 struct ethtool_drvinfo *drvinfo)
650 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
651 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
652 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
655 static int dsa_slave_get_regs_len(struct net_device *dev)
657 struct dsa_port *dp = dsa_slave_to_port(dev);
658 struct dsa_switch *ds = dp->ds;
660 if (ds->ops->get_regs_len)
661 return ds->ops->get_regs_len(ds, dp->index);
667 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
669 struct dsa_port *dp = dsa_slave_to_port(dev);
670 struct dsa_switch *ds = dp->ds;
672 if (ds->ops->get_regs)
673 ds->ops->get_regs(ds, dp->index, regs, _p);
676 static int dsa_slave_nway_reset(struct net_device *dev)
678 struct dsa_port *dp = dsa_slave_to_port(dev);
680 return phylink_ethtool_nway_reset(dp->pl);
683 static int dsa_slave_get_eeprom_len(struct net_device *dev)
685 struct dsa_port *dp = dsa_slave_to_port(dev);
686 struct dsa_switch *ds = dp->ds;
688 if (ds->cd && ds->cd->eeprom_len)
689 return ds->cd->eeprom_len;
691 if (ds->ops->get_eeprom_len)
692 return ds->ops->get_eeprom_len(ds);
697 static int dsa_slave_get_eeprom(struct net_device *dev,
698 struct ethtool_eeprom *eeprom, u8 *data)
700 struct dsa_port *dp = dsa_slave_to_port(dev);
701 struct dsa_switch *ds = dp->ds;
703 if (ds->ops->get_eeprom)
704 return ds->ops->get_eeprom(ds, eeprom, data);
709 static int dsa_slave_set_eeprom(struct net_device *dev,
710 struct ethtool_eeprom *eeprom, u8 *data)
712 struct dsa_port *dp = dsa_slave_to_port(dev);
713 struct dsa_switch *ds = dp->ds;
715 if (ds->ops->set_eeprom)
716 return ds->ops->set_eeprom(ds, eeprom, data);
721 static void dsa_slave_get_strings(struct net_device *dev,
722 uint32_t stringset, uint8_t *data)
724 struct dsa_port *dp = dsa_slave_to_port(dev);
725 struct dsa_switch *ds = dp->ds;
727 if (stringset == ETH_SS_STATS) {
728 int len = ETH_GSTRING_LEN;
730 strncpy(data, "tx_packets", len);
731 strncpy(data + len, "tx_bytes", len);
732 strncpy(data + 2 * len, "rx_packets", len);
733 strncpy(data + 3 * len, "rx_bytes", len);
734 if (ds->ops->get_strings)
735 ds->ops->get_strings(ds, dp->index, stringset,
737 } else if (stringset == ETH_SS_TEST) {
738 net_selftest_get_strings(data);
743 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
744 struct ethtool_stats *stats,
747 struct dsa_port *dp = dsa_slave_to_port(dev);
748 struct dsa_switch *ds = dp->ds;
749 struct pcpu_sw_netstats *s;
753 for_each_possible_cpu(i) {
754 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
756 s = per_cpu_ptr(dev->tstats, i);
758 start = u64_stats_fetch_begin_irq(&s->syncp);
759 tx_packets = s->tx_packets;
760 tx_bytes = s->tx_bytes;
761 rx_packets = s->rx_packets;
762 rx_bytes = s->rx_bytes;
763 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
764 data[0] += tx_packets;
766 data[2] += rx_packets;
769 if (ds->ops->get_ethtool_stats)
770 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
773 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
775 struct dsa_port *dp = dsa_slave_to_port(dev);
776 struct dsa_switch *ds = dp->ds;
778 if (sset == ETH_SS_STATS) {
781 if (ds->ops->get_sset_count) {
782 count = ds->ops->get_sset_count(ds, dp->index, sset);
788 } else if (sset == ETH_SS_TEST) {
789 return net_selftest_get_count();
795 static void dsa_slave_net_selftest(struct net_device *ndev,
796 struct ethtool_test *etest, u64 *buf)
798 struct dsa_port *dp = dsa_slave_to_port(ndev);
799 struct dsa_switch *ds = dp->ds;
801 if (ds->ops->self_test) {
802 ds->ops->self_test(ds, dp->index, etest, buf);
806 net_selftest(ndev, etest, buf);
809 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
811 struct dsa_port *dp = dsa_slave_to_port(dev);
812 struct dsa_switch *ds = dp->ds;
814 phylink_ethtool_get_wol(dp->pl, w);
816 if (ds->ops->get_wol)
817 ds->ops->get_wol(ds, dp->index, w);
820 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
822 struct dsa_port *dp = dsa_slave_to_port(dev);
823 struct dsa_switch *ds = dp->ds;
824 int ret = -EOPNOTSUPP;
826 phylink_ethtool_set_wol(dp->pl, w);
828 if (ds->ops->set_wol)
829 ret = ds->ops->set_wol(ds, dp->index, w);
834 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
836 struct dsa_port *dp = dsa_slave_to_port(dev);
837 struct dsa_switch *ds = dp->ds;
840 /* Port's PHY and MAC both need to be EEE capable */
841 if (!dev->phydev || !dp->pl)
844 if (!ds->ops->set_mac_eee)
847 ret = ds->ops->set_mac_eee(ds, dp->index, e);
851 return phylink_ethtool_set_eee(dp->pl, e);
854 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
856 struct dsa_port *dp = dsa_slave_to_port(dev);
857 struct dsa_switch *ds = dp->ds;
860 /* Port's PHY and MAC both need to be EEE capable */
861 if (!dev->phydev || !dp->pl)
864 if (!ds->ops->get_mac_eee)
867 ret = ds->ops->get_mac_eee(ds, dp->index, e);
871 return phylink_ethtool_get_eee(dp->pl, e);
874 static int dsa_slave_get_link_ksettings(struct net_device *dev,
875 struct ethtool_link_ksettings *cmd)
877 struct dsa_port *dp = dsa_slave_to_port(dev);
879 return phylink_ethtool_ksettings_get(dp->pl, cmd);
882 static int dsa_slave_set_link_ksettings(struct net_device *dev,
883 const struct ethtool_link_ksettings *cmd)
885 struct dsa_port *dp = dsa_slave_to_port(dev);
887 return phylink_ethtool_ksettings_set(dp->pl, cmd);
890 static void dsa_slave_get_pauseparam(struct net_device *dev,
891 struct ethtool_pauseparam *pause)
893 struct dsa_port *dp = dsa_slave_to_port(dev);
895 phylink_ethtool_get_pauseparam(dp->pl, pause);
898 static int dsa_slave_set_pauseparam(struct net_device *dev,
899 struct ethtool_pauseparam *pause)
901 struct dsa_port *dp = dsa_slave_to_port(dev);
903 return phylink_ethtool_set_pauseparam(dp->pl, pause);
906 #ifdef CONFIG_NET_POLL_CONTROLLER
907 static int dsa_slave_netpoll_setup(struct net_device *dev,
908 struct netpoll_info *ni)
910 struct net_device *master = dsa_slave_to_master(dev);
911 struct dsa_slave_priv *p = netdev_priv(dev);
912 struct netpoll *netpoll;
915 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
919 err = __netpoll_setup(netpoll, master);
925 p->netpoll = netpoll;
930 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
932 struct dsa_slave_priv *p = netdev_priv(dev);
933 struct netpoll *netpoll = p->netpoll;
940 __netpoll_free(netpoll);
943 static void dsa_slave_poll_controller(struct net_device *dev)
948 static int dsa_slave_get_phys_port_name(struct net_device *dev,
949 char *name, size_t len)
951 struct dsa_port *dp = dsa_slave_to_port(dev);
953 /* For non-legacy ports, devlink is used and it takes
954 * care of the name generation. This ndo implementation
955 * should be removed with legacy support.
960 if (snprintf(name, len, "p%d", dp->index) >= len)
966 static struct dsa_mall_tc_entry *
967 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
969 struct dsa_slave_priv *p = netdev_priv(dev);
970 struct dsa_mall_tc_entry *mall_tc_entry;
972 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
973 if (mall_tc_entry->cookie == cookie)
974 return mall_tc_entry;
980 dsa_slave_add_cls_matchall_mirred(struct net_device *dev,
981 struct tc_cls_matchall_offload *cls,
984 struct dsa_port *dp = dsa_slave_to_port(dev);
985 struct dsa_slave_priv *p = netdev_priv(dev);
986 struct dsa_mall_mirror_tc_entry *mirror;
987 struct dsa_mall_tc_entry *mall_tc_entry;
988 struct dsa_switch *ds = dp->ds;
989 struct flow_action_entry *act;
990 struct dsa_port *to_dp;
993 if (!ds->ops->port_mirror_add)
996 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
1000 act = &cls->rule->action.entries[0];
1005 if (!dsa_slave_dev_check(act->dev))
1008 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1012 mall_tc_entry->cookie = cls->cookie;
1013 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
1014 mirror = &mall_tc_entry->mirror;
1016 to_dp = dsa_slave_to_port(act->dev);
1018 mirror->to_local_port = to_dp->index;
1019 mirror->ingress = ingress;
1021 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
1023 kfree(mall_tc_entry);
1027 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
1033 dsa_slave_add_cls_matchall_police(struct net_device *dev,
1034 struct tc_cls_matchall_offload *cls,
1037 struct netlink_ext_ack *extack = cls->common.extack;
1038 struct dsa_port *dp = dsa_slave_to_port(dev);
1039 struct dsa_slave_priv *p = netdev_priv(dev);
1040 struct dsa_mall_policer_tc_entry *policer;
1041 struct dsa_mall_tc_entry *mall_tc_entry;
1042 struct dsa_switch *ds = dp->ds;
1043 struct flow_action_entry *act;
1046 if (!ds->ops->port_policer_add) {
1047 NL_SET_ERR_MSG_MOD(extack,
1048 "Policing offload not implemented");
1053 NL_SET_ERR_MSG_MOD(extack,
1054 "Only supported on ingress qdisc");
1058 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
1059 cls->common.extack))
1062 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) {
1063 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) {
1064 NL_SET_ERR_MSG_MOD(extack,
1065 "Only one port policer allowed");
1070 act = &cls->rule->action.entries[0];
1072 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1076 mall_tc_entry->cookie = cls->cookie;
1077 mall_tc_entry->type = DSA_PORT_MALL_POLICER;
1078 policer = &mall_tc_entry->policer;
1079 policer->rate_bytes_per_sec = act->police.rate_bytes_ps;
1080 policer->burst = act->police.burst;
1082 err = ds->ops->port_policer_add(ds, dp->index, policer);
1084 kfree(mall_tc_entry);
1088 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
1093 static int dsa_slave_add_cls_matchall(struct net_device *dev,
1094 struct tc_cls_matchall_offload *cls,
1097 int err = -EOPNOTSUPP;
1099 if (cls->common.protocol == htons(ETH_P_ALL) &&
1100 flow_offload_has_one_action(&cls->rule->action) &&
1101 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED)
1102 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress);
1103 else if (flow_offload_has_one_action(&cls->rule->action) &&
1104 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE)
1105 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress);
1110 static void dsa_slave_del_cls_matchall(struct net_device *dev,
1111 struct tc_cls_matchall_offload *cls)
1113 struct dsa_port *dp = dsa_slave_to_port(dev);
1114 struct dsa_mall_tc_entry *mall_tc_entry;
1115 struct dsa_switch *ds = dp->ds;
1117 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
1121 list_del(&mall_tc_entry->list);
1123 switch (mall_tc_entry->type) {
1124 case DSA_PORT_MALL_MIRROR:
1125 if (ds->ops->port_mirror_del)
1126 ds->ops->port_mirror_del(ds, dp->index,
1127 &mall_tc_entry->mirror);
1129 case DSA_PORT_MALL_POLICER:
1130 if (ds->ops->port_policer_del)
1131 ds->ops->port_policer_del(ds, dp->index);
1137 kfree(mall_tc_entry);
1140 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
1141 struct tc_cls_matchall_offload *cls,
1144 if (cls->common.chain_index)
1147 switch (cls->command) {
1148 case TC_CLSMATCHALL_REPLACE:
1149 return dsa_slave_add_cls_matchall(dev, cls, ingress);
1150 case TC_CLSMATCHALL_DESTROY:
1151 dsa_slave_del_cls_matchall(dev, cls);
1158 static int dsa_slave_add_cls_flower(struct net_device *dev,
1159 struct flow_cls_offload *cls,
1162 struct dsa_port *dp = dsa_slave_to_port(dev);
1163 struct dsa_switch *ds = dp->ds;
1164 int port = dp->index;
1166 if (!ds->ops->cls_flower_add)
1169 return ds->ops->cls_flower_add(ds, port, cls, ingress);
1172 static int dsa_slave_del_cls_flower(struct net_device *dev,
1173 struct flow_cls_offload *cls,
1176 struct dsa_port *dp = dsa_slave_to_port(dev);
1177 struct dsa_switch *ds = dp->ds;
1178 int port = dp->index;
1180 if (!ds->ops->cls_flower_del)
1183 return ds->ops->cls_flower_del(ds, port, cls, ingress);
1186 static int dsa_slave_stats_cls_flower(struct net_device *dev,
1187 struct flow_cls_offload *cls,
1190 struct dsa_port *dp = dsa_slave_to_port(dev);
1191 struct dsa_switch *ds = dp->ds;
1192 int port = dp->index;
1194 if (!ds->ops->cls_flower_stats)
1197 return ds->ops->cls_flower_stats(ds, port, cls, ingress);
1200 static int dsa_slave_setup_tc_cls_flower(struct net_device *dev,
1201 struct flow_cls_offload *cls,
1204 switch (cls->command) {
1205 case FLOW_CLS_REPLACE:
1206 return dsa_slave_add_cls_flower(dev, cls, ingress);
1207 case FLOW_CLS_DESTROY:
1208 return dsa_slave_del_cls_flower(dev, cls, ingress);
1209 case FLOW_CLS_STATS:
1210 return dsa_slave_stats_cls_flower(dev, cls, ingress);
1216 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
1217 void *cb_priv, bool ingress)
1219 struct net_device *dev = cb_priv;
1221 if (!tc_can_offload(dev))
1225 case TC_SETUP_CLSMATCHALL:
1226 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
1227 case TC_SETUP_CLSFLOWER:
1228 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress);
1234 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
1235 void *type_data, void *cb_priv)
1237 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
1240 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
1241 void *type_data, void *cb_priv)
1243 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
1246 static LIST_HEAD(dsa_slave_block_cb_list);
1248 static int dsa_slave_setup_tc_block(struct net_device *dev,
1249 struct flow_block_offload *f)
1251 struct flow_block_cb *block_cb;
1252 flow_setup_cb_t *cb;
1254 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
1255 cb = dsa_slave_setup_tc_block_cb_ig;
1256 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
1257 cb = dsa_slave_setup_tc_block_cb_eg;
1261 f->driver_block_list = &dsa_slave_block_cb_list;
1263 switch (f->command) {
1264 case FLOW_BLOCK_BIND:
1265 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list))
1268 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL);
1269 if (IS_ERR(block_cb))
1270 return PTR_ERR(block_cb);
1272 flow_block_cb_add(block_cb, f);
1273 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list);
1275 case FLOW_BLOCK_UNBIND:
1276 block_cb = flow_block_cb_lookup(f->block, cb, dev);
1280 flow_block_cb_remove(block_cb, f);
1281 list_del(&block_cb->driver_list);
1288 static int dsa_slave_setup_ft_block(struct dsa_switch *ds, int port,
1291 struct dsa_port *cpu_dp = dsa_to_port(ds, port)->cpu_dp;
1292 struct net_device *master = cpu_dp->master;
1294 if (!master->netdev_ops->ndo_setup_tc)
1297 return master->netdev_ops->ndo_setup_tc(master, TC_SETUP_FT, type_data);
1300 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
1303 struct dsa_port *dp = dsa_slave_to_port(dev);
1304 struct dsa_switch *ds = dp->ds;
1307 case TC_SETUP_BLOCK:
1308 return dsa_slave_setup_tc_block(dev, type_data);
1310 return dsa_slave_setup_ft_block(ds, dp->index, type_data);
1315 if (!ds->ops->port_setup_tc)
1318 return ds->ops->port_setup_tc(ds, dp->index, type, type_data);
1321 static int dsa_slave_get_rxnfc(struct net_device *dev,
1322 struct ethtool_rxnfc *nfc, u32 *rule_locs)
1324 struct dsa_port *dp = dsa_slave_to_port(dev);
1325 struct dsa_switch *ds = dp->ds;
1327 if (!ds->ops->get_rxnfc)
1330 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
1333 static int dsa_slave_set_rxnfc(struct net_device *dev,
1334 struct ethtool_rxnfc *nfc)
1336 struct dsa_port *dp = dsa_slave_to_port(dev);
1337 struct dsa_switch *ds = dp->ds;
1339 if (!ds->ops->set_rxnfc)
1342 return ds->ops->set_rxnfc(ds, dp->index, nfc);
1345 static int dsa_slave_get_ts_info(struct net_device *dev,
1346 struct ethtool_ts_info *ts)
1348 struct dsa_slave_priv *p = netdev_priv(dev);
1349 struct dsa_switch *ds = p->dp->ds;
1351 if (!ds->ops->get_ts_info)
1354 return ds->ops->get_ts_info(ds, p->dp->index, ts);
1357 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
1360 struct net_device *master = dsa_slave_to_master(dev);
1361 struct dsa_port *dp = dsa_slave_to_port(dev);
1362 struct switchdev_obj_port_vlan vlan = {
1363 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
1365 /* This API only allows programming tagged, non-PVID VIDs */
1368 struct netlink_ext_ack extack = {0};
1372 ret = dsa_port_vlan_add(dp, &vlan, &extack);
1375 netdev_err(dev, "%s\n", extack._msg);
1379 /* And CPU port... */
1380 ret = dsa_port_vlan_add(dp->cpu_dp, &vlan, &extack);
1383 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index,
1388 return vlan_vid_add(master, proto, vid);
1391 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
1394 struct net_device *master = dsa_slave_to_master(dev);
1395 struct dsa_port *dp = dsa_slave_to_port(dev);
1396 struct switchdev_obj_port_vlan vlan = {
1398 /* This API only allows programming tagged, non-PVID VIDs */
1403 /* Do not deprogram the CPU port as it may be shared with other user
1404 * ports which can be members of this VLAN as well.
1406 err = dsa_port_vlan_del(dp, &vlan);
1410 vlan_vid_del(master, proto, vid);
1415 struct dsa_hw_port {
1416 struct list_head list;
1417 struct net_device *dev;
1421 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu)
1423 const struct dsa_hw_port *p;
1426 list_for_each_entry(p, hw_port_list, list) {
1427 if (p->dev->mtu == mtu)
1430 err = dev_set_mtu(p->dev, mtu);
1438 list_for_each_entry_continue_reverse(p, hw_port_list, list) {
1439 if (p->dev->mtu == p->old_mtu)
1442 if (dev_set_mtu(p->dev, p->old_mtu))
1443 netdev_err(p->dev, "Failed to restore MTU\n");
1449 static void dsa_hw_port_list_free(struct list_head *hw_port_list)
1451 struct dsa_hw_port *p, *n;
1453 list_for_each_entry_safe(p, n, hw_port_list, list)
1457 /* Make the hardware datapath to/from @dev limited to a common MTU */
1458 static void dsa_bridge_mtu_normalization(struct dsa_port *dp)
1460 struct list_head hw_port_list;
1461 struct dsa_switch_tree *dst;
1462 int min_mtu = ETH_MAX_MTU;
1463 struct dsa_port *other_dp;
1466 if (!dp->ds->mtu_enforcement_ingress)
1469 if (!dp->bridge_dev)
1472 INIT_LIST_HEAD(&hw_port_list);
1474 /* Populate the list of ports that are part of the same bridge
1475 * as the newly added/modified port
1477 list_for_each_entry(dst, &dsa_tree_list, list) {
1478 list_for_each_entry(other_dp, &dst->ports, list) {
1479 struct dsa_hw_port *hw_port;
1480 struct net_device *slave;
1482 if (other_dp->type != DSA_PORT_TYPE_USER)
1485 if (other_dp->bridge_dev != dp->bridge_dev)
1488 if (!other_dp->ds->mtu_enforcement_ingress)
1491 slave = other_dp->slave;
1493 if (min_mtu > slave->mtu)
1494 min_mtu = slave->mtu;
1496 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL);
1500 hw_port->dev = slave;
1501 hw_port->old_mtu = slave->mtu;
1503 list_add(&hw_port->list, &hw_port_list);
1507 /* Attempt to configure the entire hardware bridge to the newly added
1508 * interface's MTU first, regardless of whether the intention of the
1509 * user was to raise or lower it.
1511 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu);
1515 /* Clearly that didn't work out so well, so just set the minimum MTU on
1516 * all hardware bridge ports now. If this fails too, then all ports will
1517 * still have their old MTU rolled back anyway.
1519 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu);
1522 dsa_hw_port_list_free(&hw_port_list);
1525 int dsa_slave_change_mtu(struct net_device *dev, int new_mtu)
1527 struct net_device *master = dsa_slave_to_master(dev);
1528 struct dsa_port *dp = dsa_slave_to_port(dev);
1529 struct dsa_slave_priv *p = netdev_priv(dev);
1530 struct dsa_switch *ds = p->dp->ds;
1531 struct dsa_port *cpu_dp;
1532 int port = p->dp->index;
1533 int largest_mtu = 0;
1540 if (!ds->ops->port_change_mtu)
1543 for (i = 0; i < ds->num_ports; i++) {
1546 if (!dsa_is_user_port(ds, i))
1549 /* During probe, this function will be called for each slave
1550 * device, while not all of them have been allocated. That's
1551 * ok, it doesn't change what the maximum is, so ignore it.
1553 if (!dsa_to_port(ds, i)->slave)
1556 /* Pretend that we already applied the setting, which we
1557 * actually haven't (still haven't done all integrity checks)
1560 slave_mtu = new_mtu;
1562 slave_mtu = dsa_to_port(ds, i)->slave->mtu;
1564 if (largest_mtu < slave_mtu)
1565 largest_mtu = slave_mtu;
1568 cpu_dp = dsa_to_port(ds, port)->cpu_dp;
1570 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu);
1571 old_master_mtu = master->mtu;
1572 new_master_mtu = largest_mtu + cpu_dp->tag_ops->overhead;
1573 if (new_master_mtu > mtu_limit)
1576 /* If the master MTU isn't over limit, there's no need to check the CPU
1577 * MTU, since that surely isn't either.
1579 cpu_mtu = largest_mtu;
1581 /* Start applying stuff */
1582 if (new_master_mtu != old_master_mtu) {
1583 err = dev_set_mtu(master, new_master_mtu);
1585 goto out_master_failed;
1587 /* We only need to propagate the MTU of the CPU port to
1588 * upstream switches.
1590 err = dsa_port_mtu_change(cpu_dp, cpu_mtu, true);
1592 goto out_cpu_failed;
1595 err = dsa_port_mtu_change(dp, new_mtu, false);
1597 goto out_port_failed;
1601 dsa_bridge_mtu_normalization(dp);
1606 if (new_master_mtu != old_master_mtu)
1607 dsa_port_mtu_change(cpu_dp, old_master_mtu -
1608 cpu_dp->tag_ops->overhead,
1611 if (new_master_mtu != old_master_mtu)
1612 dev_set_mtu(master, old_master_mtu);
1617 static const struct ethtool_ops dsa_slave_ethtool_ops = {
1618 .get_drvinfo = dsa_slave_get_drvinfo,
1619 .get_regs_len = dsa_slave_get_regs_len,
1620 .get_regs = dsa_slave_get_regs,
1621 .nway_reset = dsa_slave_nway_reset,
1622 .get_link = ethtool_op_get_link,
1623 .get_eeprom_len = dsa_slave_get_eeprom_len,
1624 .get_eeprom = dsa_slave_get_eeprom,
1625 .set_eeprom = dsa_slave_set_eeprom,
1626 .get_strings = dsa_slave_get_strings,
1627 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
1628 .get_sset_count = dsa_slave_get_sset_count,
1629 .set_wol = dsa_slave_set_wol,
1630 .get_wol = dsa_slave_get_wol,
1631 .set_eee = dsa_slave_set_eee,
1632 .get_eee = dsa_slave_get_eee,
1633 .get_link_ksettings = dsa_slave_get_link_ksettings,
1634 .set_link_ksettings = dsa_slave_set_link_ksettings,
1635 .get_pauseparam = dsa_slave_get_pauseparam,
1636 .set_pauseparam = dsa_slave_set_pauseparam,
1637 .get_rxnfc = dsa_slave_get_rxnfc,
1638 .set_rxnfc = dsa_slave_set_rxnfc,
1639 .get_ts_info = dsa_slave_get_ts_info,
1640 .self_test = dsa_slave_net_selftest,
1643 /* legacy way, bypassing the bridge *****************************************/
1644 static int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
1645 struct net_device *dev,
1646 const unsigned char *addr, u16 vid,
1648 struct netlink_ext_ack *extack)
1650 struct dsa_port *dp = dsa_slave_to_port(dev);
1652 return dsa_port_fdb_add(dp, addr, vid);
1655 static int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
1656 struct net_device *dev,
1657 const unsigned char *addr, u16 vid)
1659 struct dsa_port *dp = dsa_slave_to_port(dev);
1661 return dsa_port_fdb_del(dp, addr, vid);
1664 static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
1666 struct dsa_port *dp = dsa_slave_to_port(dev);
1668 return dp->ds->devlink ? &dp->devlink_port : NULL;
1671 static void dsa_slave_get_stats64(struct net_device *dev,
1672 struct rtnl_link_stats64 *s)
1674 struct dsa_port *dp = dsa_slave_to_port(dev);
1675 struct dsa_switch *ds = dp->ds;
1677 if (ds->ops->get_stats64)
1678 ds->ops->get_stats64(ds, dp->index, s);
1680 dev_get_tstats64(dev, s);
1683 static int dsa_slave_fill_forward_path(struct net_device_path_ctx *ctx,
1684 struct net_device_path *path)
1686 struct dsa_port *dp = dsa_slave_to_port(ctx->dev);
1687 struct dsa_port *cpu_dp = dp->cpu_dp;
1689 path->dev = ctx->dev;
1690 path->type = DEV_PATH_DSA;
1691 path->dsa.proto = cpu_dp->tag_ops->proto;
1692 path->dsa.port = dp->index;
1693 ctx->dev = cpu_dp->master;
1698 static const struct net_device_ops dsa_slave_netdev_ops = {
1699 .ndo_open = dsa_slave_open,
1700 .ndo_stop = dsa_slave_close,
1701 .ndo_start_xmit = dsa_slave_xmit,
1702 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
1703 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
1704 .ndo_set_mac_address = dsa_slave_set_mac_address,
1705 .ndo_fdb_add = dsa_legacy_fdb_add,
1706 .ndo_fdb_del = dsa_legacy_fdb_del,
1707 .ndo_fdb_dump = dsa_slave_fdb_dump,
1708 .ndo_do_ioctl = dsa_slave_ioctl,
1709 .ndo_get_iflink = dsa_slave_get_iflink,
1710 #ifdef CONFIG_NET_POLL_CONTROLLER
1711 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
1712 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
1713 .ndo_poll_controller = dsa_slave_poll_controller,
1715 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
1716 .ndo_setup_tc = dsa_slave_setup_tc,
1717 .ndo_get_stats64 = dsa_slave_get_stats64,
1718 .ndo_get_port_parent_id = dsa_slave_get_port_parent_id,
1719 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
1720 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
1721 .ndo_get_devlink_port = dsa_slave_get_devlink_port,
1722 .ndo_change_mtu = dsa_slave_change_mtu,
1723 .ndo_fill_forward_path = dsa_slave_fill_forward_path,
1726 static struct device_type dsa_type = {
1730 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
1732 const struct dsa_port *dp = dsa_to_port(ds, port);
1735 phylink_mac_change(dp->pl, up);
1737 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
1739 static void dsa_slave_phylink_fixed_state(struct phylink_config *config,
1740 struct phylink_link_state *state)
1742 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1743 struct dsa_switch *ds = dp->ds;
1745 /* No need to check that this operation is valid, the callback would
1746 * not be called if it was not.
1748 ds->ops->phylink_fixed_state(ds, dp->index, state);
1751 /* slave device setup *******************************************************/
1752 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
1754 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1755 struct dsa_switch *ds = dp->ds;
1757 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
1758 if (!slave_dev->phydev) {
1759 netdev_err(slave_dev, "no phy at %d\n", addr);
1763 return phylink_connect_phy(dp->pl, slave_dev->phydev);
1766 static int dsa_slave_phy_setup(struct net_device *slave_dev)
1768 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1769 struct device_node *port_dn = dp->dn;
1770 struct dsa_switch *ds = dp->ds;
1771 phy_interface_t mode;
1775 ret = of_get_phy_mode(port_dn, &mode);
1777 mode = PHY_INTERFACE_MODE_NA;
1779 dp->pl_config.dev = &slave_dev->dev;
1780 dp->pl_config.type = PHYLINK_NETDEV;
1782 /* The get_fixed_state callback takes precedence over polling the
1783 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set
1784 * this if the switch provides such a callback.
1786 if (ds->ops->phylink_fixed_state) {
1787 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state;
1788 dp->pl_config.poll_fixed_state = true;
1791 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode,
1792 &dsa_port_phylink_mac_ops);
1793 if (IS_ERR(dp->pl)) {
1794 netdev_err(slave_dev,
1795 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1796 return PTR_ERR(dp->pl);
1799 if (ds->ops->get_phy_flags)
1800 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
1802 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
1803 if (ret == -ENODEV && ds->slave_mii_bus) {
1804 /* We could not connect to a designated PHY or SFP, so try to
1805 * use the switch internal MDIO bus instead
1807 ret = dsa_slave_phy_connect(slave_dev, dp->index);
1809 netdev_err(slave_dev,
1810 "failed to connect to port %d: %d\n",
1812 phylink_destroy(dp->pl);
1820 void dsa_slave_setup_tagger(struct net_device *slave)
1822 struct dsa_port *dp = dsa_slave_to_port(slave);
1823 struct dsa_slave_priv *p = netdev_priv(slave);
1824 const struct dsa_port *cpu_dp = dp->cpu_dp;
1825 struct net_device *master = cpu_dp->master;
1827 if (cpu_dp->tag_ops->tail_tag)
1828 slave->needed_tailroom = cpu_dp->tag_ops->overhead;
1830 slave->needed_headroom = cpu_dp->tag_ops->overhead;
1831 /* Try to save one extra realloc later in the TX path (in the master)
1832 * by also inheriting the master's needed headroom and tailroom.
1833 * The 8021q driver also does this.
1835 slave->needed_headroom += master->needed_headroom;
1836 slave->needed_tailroom += master->needed_tailroom;
1838 p->xmit = cpu_dp->tag_ops->xmit;
1841 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1842 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1843 struct netdev_queue *txq,
1846 lockdep_set_class(&txq->_xmit_lock,
1847 &dsa_slave_netdev_xmit_lock_key);
1850 int dsa_slave_suspend(struct net_device *slave_dev)
1852 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1854 if (!netif_running(slave_dev))
1857 netif_device_detach(slave_dev);
1860 phylink_stop(dp->pl);
1866 int dsa_slave_resume(struct net_device *slave_dev)
1868 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1870 if (!netif_running(slave_dev))
1873 netif_device_attach(slave_dev);
1876 phylink_start(dp->pl);
1882 int dsa_slave_create(struct dsa_port *port)
1884 const struct dsa_port *cpu_dp = port->cpu_dp;
1885 struct net_device *master = cpu_dp->master;
1886 struct dsa_switch *ds = port->ds;
1887 const char *name = port->name;
1888 struct net_device *slave_dev;
1889 struct dsa_slave_priv *p;
1892 if (!ds->num_tx_queues)
1893 ds->num_tx_queues = 1;
1895 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
1896 NET_NAME_UNKNOWN, ether_setup,
1897 ds->num_tx_queues, 1);
1898 if (slave_dev == NULL)
1901 slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
1902 if (ds->ops->port_vlan_add && ds->ops->port_vlan_del)
1903 slave_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1904 slave_dev->hw_features |= NETIF_F_HW_TC;
1905 slave_dev->features |= NETIF_F_LLTX;
1906 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1907 if (!is_zero_ether_addr(port->mac))
1908 ether_addr_copy(slave_dev->dev_addr, port->mac);
1910 eth_hw_addr_inherit(slave_dev, master);
1911 slave_dev->priv_flags |= IFF_NO_QUEUE;
1912 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1913 if (ds->ops->port_max_mtu)
1914 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index);
1915 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1917 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1920 SET_NETDEV_DEV(slave_dev, port->ds->dev);
1921 slave_dev->dev.of_node = port->dn;
1922 slave_dev->vlan_features = master->vlan_features;
1924 p = netdev_priv(slave_dev);
1925 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1926 if (!slave_dev->tstats) {
1927 free_netdev(slave_dev);
1931 ret = gro_cells_init(&p->gcells, slave_dev);
1936 INIT_LIST_HEAD(&p->mall_tc_list);
1937 port->slave = slave_dev;
1938 dsa_slave_setup_tagger(slave_dev);
1941 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN);
1943 if (ret && ret != -EOPNOTSUPP)
1944 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n",
1945 ret, ETH_DATA_LEN, port->index);
1947 netif_carrier_off(slave_dev);
1949 ret = dsa_slave_phy_setup(slave_dev);
1951 netdev_err(slave_dev,
1952 "error %d setting up PHY for tree %d, switch %d, port %d\n",
1953 ret, ds->dst->index, ds->index, port->index);
1959 ret = register_netdevice(slave_dev);
1961 netdev_err(master, "error %d registering interface %s\n",
1962 ret, slave_dev->name);
1967 ret = netdev_upper_dev_link(master, slave_dev, NULL);
1972 goto out_unregister;
1977 unregister_netdev(slave_dev);
1980 phylink_disconnect_phy(p->dp->pl);
1982 phylink_destroy(p->dp->pl);
1984 gro_cells_destroy(&p->gcells);
1986 free_percpu(slave_dev->tstats);
1987 free_netdev(slave_dev);
1992 void dsa_slave_destroy(struct net_device *slave_dev)
1994 struct net_device *master = dsa_slave_to_master(slave_dev);
1995 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1996 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1998 netif_carrier_off(slave_dev);
2000 netdev_upper_dev_unlink(master, slave_dev);
2001 unregister_netdevice(slave_dev);
2002 phylink_disconnect_phy(dp->pl);
2005 phylink_destroy(dp->pl);
2006 gro_cells_destroy(&p->gcells);
2007 free_percpu(slave_dev->tstats);
2008 free_netdev(slave_dev);
2011 bool dsa_slave_dev_check(const struct net_device *dev)
2013 return dev->netdev_ops == &dsa_slave_netdev_ops;
2015 EXPORT_SYMBOL_GPL(dsa_slave_dev_check);
2017 static int dsa_slave_changeupper(struct net_device *dev,
2018 struct netdev_notifier_changeupper_info *info)
2020 struct dsa_port *dp = dsa_slave_to_port(dev);
2021 struct netlink_ext_ack *extack;
2022 int err = NOTIFY_DONE;
2024 extack = netdev_notifier_info_to_extack(&info->info);
2026 if (netif_is_bridge_master(info->upper_dev)) {
2027 if (info->linking) {
2028 err = dsa_port_bridge_join(dp, info->upper_dev, extack);
2030 dsa_bridge_mtu_normalization(dp);
2031 err = notifier_from_errno(err);
2033 dsa_port_bridge_leave(dp, info->upper_dev);
2036 } else if (netif_is_lag_master(info->upper_dev)) {
2037 if (info->linking) {
2038 err = dsa_port_lag_join(dp, info->upper_dev,
2039 info->upper_info, extack);
2040 if (err == -EOPNOTSUPP) {
2041 NL_SET_ERR_MSG_MOD(info->info.extack,
2042 "Offloading not supported");
2045 err = notifier_from_errno(err);
2047 dsa_port_lag_leave(dp, info->upper_dev);
2050 } else if (is_hsr_master(info->upper_dev)) {
2051 if (info->linking) {
2052 err = dsa_port_hsr_join(dp, info->upper_dev);
2053 if (err == -EOPNOTSUPP) {
2054 NL_SET_ERR_MSG_MOD(info->info.extack,
2055 "Offloading not supported");
2058 err = notifier_from_errno(err);
2060 dsa_port_hsr_leave(dp, info->upper_dev);
2069 dsa_slave_lag_changeupper(struct net_device *dev,
2070 struct netdev_notifier_changeupper_info *info)
2072 struct net_device *lower;
2073 struct list_head *iter;
2074 int err = NOTIFY_DONE;
2075 struct dsa_port *dp;
2077 netdev_for_each_lower_dev(dev, lower, iter) {
2078 if (!dsa_slave_dev_check(lower))
2081 dp = dsa_slave_to_port(lower);
2086 err = dsa_slave_changeupper(lower, info);
2087 if (notifier_to_errno(err))
2095 dsa_prevent_bridging_8021q_upper(struct net_device *dev,
2096 struct netdev_notifier_changeupper_info *info)
2098 struct netlink_ext_ack *ext_ack;
2099 struct net_device *slave;
2100 struct dsa_port *dp;
2102 ext_ack = netdev_notifier_info_to_extack(&info->info);
2104 if (!is_vlan_dev(dev))
2107 slave = vlan_dev_real_dev(dev);
2108 if (!dsa_slave_dev_check(slave))
2111 dp = dsa_slave_to_port(slave);
2112 if (!dp->bridge_dev)
2115 /* Deny enslaving a VLAN device into a VLAN-aware bridge */
2116 if (br_vlan_enabled(dp->bridge_dev) &&
2117 netif_is_bridge_master(info->upper_dev) && info->linking) {
2118 NL_SET_ERR_MSG_MOD(ext_ack,
2119 "Cannot enslave VLAN device into VLAN aware bridge");
2120 return notifier_from_errno(-EINVAL);
2127 dsa_slave_check_8021q_upper(struct net_device *dev,
2128 struct netdev_notifier_changeupper_info *info)
2130 struct dsa_port *dp = dsa_slave_to_port(dev);
2131 struct net_device *br = dp->bridge_dev;
2132 struct bridge_vlan_info br_info;
2133 struct netlink_ext_ack *extack;
2134 int err = NOTIFY_DONE;
2137 if (!br || !br_vlan_enabled(br))
2140 extack = netdev_notifier_info_to_extack(&info->info);
2141 vid = vlan_dev_vlan_id(info->upper_dev);
2143 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
2144 * device, respectively the VID is not found, returning
2145 * 0 means success, which is a failure for us here.
2147 err = br_vlan_get_info(br, vid, &br_info);
2149 NL_SET_ERR_MSG_MOD(extack,
2150 "This VLAN is already configured by the bridge");
2151 return notifier_from_errno(-EBUSY);
2157 static int dsa_slave_netdevice_event(struct notifier_block *nb,
2158 unsigned long event, void *ptr)
2160 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2163 case NETDEV_PRECHANGEUPPER: {
2164 struct netdev_notifier_changeupper_info *info = ptr;
2165 struct dsa_switch *ds;
2166 struct dsa_port *dp;
2169 if (!dsa_slave_dev_check(dev))
2170 return dsa_prevent_bridging_8021q_upper(dev, ptr);
2172 dp = dsa_slave_to_port(dev);
2175 if (ds->ops->port_prechangeupper) {
2176 err = ds->ops->port_prechangeupper(ds, dp->index, info);
2178 return notifier_from_errno(err);
2181 if (is_vlan_dev(info->upper_dev))
2182 return dsa_slave_check_8021q_upper(dev, ptr);
2185 case NETDEV_CHANGEUPPER:
2186 if (dsa_slave_dev_check(dev))
2187 return dsa_slave_changeupper(dev, ptr);
2189 if (netif_is_lag_master(dev))
2190 return dsa_slave_lag_changeupper(dev, ptr);
2193 case NETDEV_CHANGELOWERSTATE: {
2194 struct netdev_notifier_changelowerstate_info *info = ptr;
2195 struct dsa_port *dp;
2198 if (!dsa_slave_dev_check(dev))
2201 dp = dsa_slave_to_port(dev);
2203 err = dsa_port_lag_change(dp, info->lower_state_info);
2204 return notifier_from_errno(err);
2206 case NETDEV_GOING_DOWN: {
2207 struct dsa_port *dp, *cpu_dp;
2208 struct dsa_switch_tree *dst;
2209 LIST_HEAD(close_list);
2211 if (!netdev_uses_dsa(dev))
2214 cpu_dp = dev->dsa_ptr;
2215 dst = cpu_dp->ds->dst;
2217 list_for_each_entry(dp, &dst->ports, list) {
2218 if (!dsa_is_user_port(dp->ds, dp->index))
2221 list_add(&dp->slave->close_list, &close_list);
2224 dev_close_many(&close_list, true);
2236 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work)
2238 struct dsa_switch *ds = switchdev_work->ds;
2239 struct switchdev_notifier_fdb_info info;
2240 struct dsa_port *dp;
2242 if (!dsa_is_user_port(ds, switchdev_work->port))
2245 info.addr = switchdev_work->addr;
2246 info.vid = switchdev_work->vid;
2247 info.offloaded = true;
2248 dp = dsa_to_port(ds, switchdev_work->port);
2249 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
2250 dp->slave, &info.info, NULL);
2253 static void dsa_slave_switchdev_event_work(struct work_struct *work)
2255 struct dsa_switchdev_event_work *switchdev_work =
2256 container_of(work, struct dsa_switchdev_event_work, work);
2257 struct dsa_switch *ds = switchdev_work->ds;
2258 struct dsa_port *dp;
2261 dp = dsa_to_port(ds, switchdev_work->port);
2264 switch (switchdev_work->event) {
2265 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2266 err = dsa_port_fdb_add(dp, switchdev_work->addr,
2267 switchdev_work->vid);
2270 "port %d failed to add %pM vid %d to fdb: %d\n",
2271 dp->index, switchdev_work->addr,
2272 switchdev_work->vid, err);
2275 dsa_fdb_offload_notify(switchdev_work);
2278 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2279 err = dsa_port_fdb_del(dp, switchdev_work->addr,
2280 switchdev_work->vid);
2283 "port %d failed to delete %pM vid %d from fdb: %d\n",
2284 dp->index, switchdev_work->addr,
2285 switchdev_work->vid, err);
2292 kfree(switchdev_work);
2293 if (dsa_is_user_port(ds, dp->index))
2297 static int dsa_lower_dev_walk(struct net_device *lower_dev,
2298 struct netdev_nested_priv *priv)
2300 if (dsa_slave_dev_check(lower_dev)) {
2301 priv->data = (void *)netdev_priv(lower_dev);
2308 static struct dsa_slave_priv *dsa_slave_dev_lower_find(struct net_device *dev)
2310 struct netdev_nested_priv priv = {
2314 netdev_walk_all_lower_dev_rcu(dev, dsa_lower_dev_walk, &priv);
2316 return (struct dsa_slave_priv *)priv.data;
2319 /* Called under rcu_read_lock() */
2320 static int dsa_slave_switchdev_event(struct notifier_block *unused,
2321 unsigned long event, void *ptr)
2323 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2324 const struct switchdev_notifier_fdb_info *fdb_info;
2325 struct dsa_switchdev_event_work *switchdev_work;
2326 struct dsa_port *dp;
2330 case SWITCHDEV_PORT_ATTR_SET:
2331 err = switchdev_handle_port_attr_set(dev, ptr,
2332 dsa_slave_dev_check,
2333 dsa_slave_port_attr_set);
2334 return notifier_from_errno(err);
2335 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2336 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2339 if (dsa_slave_dev_check(dev)) {
2340 if (!fdb_info->added_by_user || fdb_info->is_local)
2343 dp = dsa_slave_to_port(dev);
2345 /* Snoop addresses learnt on foreign interfaces
2346 * bridged with us, for switches that don't
2347 * automatically learn SA from CPU-injected traffic
2349 struct net_device *br_dev;
2350 struct dsa_slave_priv *p;
2352 br_dev = netdev_master_upper_dev_get_rcu(dev);
2356 if (!netif_is_bridge_master(br_dev))
2359 p = dsa_slave_dev_lower_find(br_dev);
2365 if (!dp->ds->assisted_learning_on_cpu_port)
2368 /* When the bridge learns an address on an offloaded
2369 * LAG we don't want to send traffic to the CPU, the
2370 * other ports bridged with the LAG should be able to
2371 * autonomously forward towards it.
2373 if (dsa_tree_offloads_bridge_port(dp->ds->dst, dev))
2377 if (!dp->ds->ops->port_fdb_add || !dp->ds->ops->port_fdb_del)
2380 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2381 if (!switchdev_work)
2384 INIT_WORK(&switchdev_work->work,
2385 dsa_slave_switchdev_event_work);
2386 switchdev_work->ds = dp->ds;
2387 switchdev_work->port = dp->index;
2388 switchdev_work->event = event;
2390 ether_addr_copy(switchdev_work->addr,
2392 switchdev_work->vid = fdb_info->vid;
2394 /* Hold a reference on the slave for dsa_fdb_offload_notify */
2395 if (dsa_is_user_port(dp->ds, dp->index))
2397 dsa_schedule_work(&switchdev_work->work);
2406 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
2407 unsigned long event, void *ptr)
2409 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2413 case SWITCHDEV_PORT_OBJ_ADD:
2414 err = switchdev_handle_port_obj_add(dev, ptr,
2415 dsa_slave_dev_check,
2416 dsa_slave_port_obj_add);
2417 return notifier_from_errno(err);
2418 case SWITCHDEV_PORT_OBJ_DEL:
2419 err = switchdev_handle_port_obj_del(dev, ptr,
2420 dsa_slave_dev_check,
2421 dsa_slave_port_obj_del);
2422 return notifier_from_errno(err);
2423 case SWITCHDEV_PORT_ATTR_SET:
2424 err = switchdev_handle_port_attr_set(dev, ptr,
2425 dsa_slave_dev_check,
2426 dsa_slave_port_attr_set);
2427 return notifier_from_errno(err);
2433 static struct notifier_block dsa_slave_nb __read_mostly = {
2434 .notifier_call = dsa_slave_netdevice_event,
2437 struct notifier_block dsa_slave_switchdev_notifier = {
2438 .notifier_call = dsa_slave_switchdev_event,
2441 struct notifier_block dsa_slave_switchdev_blocking_notifier = {
2442 .notifier_call = dsa_slave_switchdev_blocking_event,
2445 int dsa_slave_register_notifier(void)
2447 struct notifier_block *nb;
2450 err = register_netdevice_notifier(&dsa_slave_nb);
2454 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
2456 goto err_switchdev_nb;
2458 nb = &dsa_slave_switchdev_blocking_notifier;
2459 err = register_switchdev_blocking_notifier(nb);
2461 goto err_switchdev_blocking_nb;
2465 err_switchdev_blocking_nb:
2466 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2468 unregister_netdevice_notifier(&dsa_slave_nb);
2472 void dsa_slave_unregister_notifier(void)
2474 struct notifier_block *nb;
2477 nb = &dsa_slave_switchdev_blocking_notifier;
2478 err = unregister_switchdev_blocking_notifier(nb);
2480 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
2482 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2484 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
2486 err = unregister_netdevice_notifier(&dsa_slave_nb);
2488 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);