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/tc_act/tc_mirred.h>
19 #include <linux/if_bridge.h>
20 #include <linux/netpoll.h>
21 #include <linux/ptp_classify.h>
25 static bool dsa_slave_dev_check(const struct net_device *dev);
27 /* slave mii_bus handling ***************************************************/
28 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
30 struct dsa_switch *ds = bus->priv;
32 if (ds->phys_mii_mask & (1 << addr))
33 return ds->ops->phy_read(ds, addr, reg);
38 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
40 struct dsa_switch *ds = bus->priv;
42 if (ds->phys_mii_mask & (1 << addr))
43 return ds->ops->phy_write(ds, addr, reg, val);
48 void dsa_slave_mii_bus_init(struct dsa_switch *ds)
50 ds->slave_mii_bus->priv = (void *)ds;
51 ds->slave_mii_bus->name = "dsa slave smi";
52 ds->slave_mii_bus->read = dsa_slave_phy_read;
53 ds->slave_mii_bus->write = dsa_slave_phy_write;
54 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
55 ds->dst->index, ds->index);
56 ds->slave_mii_bus->parent = ds->dev;
57 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
61 /* slave device handling ****************************************************/
62 static int dsa_slave_get_iflink(const struct net_device *dev)
64 return dsa_slave_to_master(dev)->ifindex;
67 static int dsa_slave_open(struct net_device *dev)
69 struct net_device *master = dsa_slave_to_master(dev);
70 struct dsa_port *dp = dsa_slave_to_port(dev);
73 if (!(master->flags & IFF_UP))
76 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
77 err = dev_uc_add(master, dev->dev_addr);
82 if (dev->flags & IFF_ALLMULTI) {
83 err = dev_set_allmulti(master, 1);
87 if (dev->flags & IFF_PROMISC) {
88 err = dev_set_promiscuity(master, 1);
93 err = dsa_port_enable(dp, dev->phydev);
97 phylink_start(dp->pl);
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 cancel_work_sync(&dp->xmit_work);
120 skb_queue_purge(&dp->xmit_queue);
122 phylink_stop(dp->pl);
124 dsa_port_disable(dp);
126 dev_mc_unsync(master, dev);
127 dev_uc_unsync(master, dev);
128 if (dev->flags & IFF_ALLMULTI)
129 dev_set_allmulti(master, -1);
130 if (dev->flags & IFF_PROMISC)
131 dev_set_promiscuity(master, -1);
133 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
134 dev_uc_del(master, dev->dev_addr);
139 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
141 struct net_device *master = dsa_slave_to_master(dev);
142 if (dev->flags & IFF_UP) {
143 if (change & IFF_ALLMULTI)
144 dev_set_allmulti(master,
145 dev->flags & IFF_ALLMULTI ? 1 : -1);
146 if (change & IFF_PROMISC)
147 dev_set_promiscuity(master,
148 dev->flags & IFF_PROMISC ? 1 : -1);
152 static void dsa_slave_set_rx_mode(struct net_device *dev)
154 struct net_device *master = dsa_slave_to_master(dev);
156 dev_mc_sync(master, dev);
157 dev_uc_sync(master, dev);
160 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
162 struct net_device *master = dsa_slave_to_master(dev);
163 struct sockaddr *addr = a;
166 if (!is_valid_ether_addr(addr->sa_data))
167 return -EADDRNOTAVAIL;
169 if (!(dev->flags & IFF_UP))
172 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
173 err = dev_uc_add(master, addr->sa_data);
178 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
179 dev_uc_del(master, dev->dev_addr);
182 ether_addr_copy(dev->dev_addr, addr->sa_data);
187 struct dsa_slave_dump_ctx {
188 struct net_device *dev;
190 struct netlink_callback *cb;
195 dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid,
196 bool is_static, void *data)
198 struct dsa_slave_dump_ctx *dump = data;
199 u32 portid = NETLINK_CB(dump->cb->skb).portid;
200 u32 seq = dump->cb->nlh->nlmsg_seq;
201 struct nlmsghdr *nlh;
204 if (dump->idx < dump->cb->args[2])
207 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
208 sizeof(*ndm), NLM_F_MULTI);
212 ndm = nlmsg_data(nlh);
213 ndm->ndm_family = AF_BRIDGE;
216 ndm->ndm_flags = NTF_SELF;
218 ndm->ndm_ifindex = dump->dev->ifindex;
219 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
221 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
222 goto nla_put_failure;
224 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
225 goto nla_put_failure;
227 nlmsg_end(dump->skb, nlh);
234 nlmsg_cancel(dump->skb, nlh);
239 dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
240 struct net_device *dev, struct net_device *filter_dev,
243 struct dsa_port *dp = dsa_slave_to_port(dev);
244 struct dsa_slave_dump_ctx dump = {
252 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump);
258 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
260 struct dsa_slave_priv *p = netdev_priv(dev);
261 struct dsa_switch *ds = p->dp->ds;
262 int port = p->dp->index;
264 /* Pass through to switch driver if it supports timestamping */
267 if (ds->ops->port_hwtstamp_get)
268 return ds->ops->port_hwtstamp_get(ds, port, ifr);
271 if (ds->ops->port_hwtstamp_set)
272 return ds->ops->port_hwtstamp_set(ds, port, ifr);
276 return phylink_mii_ioctl(p->dp->pl, ifr, cmd);
279 static int dsa_slave_port_attr_set(struct net_device *dev,
280 const struct switchdev_attr *attr,
281 struct switchdev_trans *trans)
283 struct dsa_port *dp = dsa_slave_to_port(dev);
287 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
288 ret = dsa_port_set_state(dp, attr->u.stp_state, trans);
290 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
291 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
294 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
295 ret = dsa_port_ageing_time(dp, attr->u.ageing_time, trans);
297 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
298 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags,
301 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
302 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, trans);
304 case SWITCHDEV_ATTR_ID_BRIDGE_MROUTER:
305 ret = dsa_port_mrouter(dp->cpu_dp, attr->u.mrouter, trans);
315 static int dsa_slave_port_obj_add(struct net_device *dev,
316 const struct switchdev_obj *obj,
317 struct switchdev_trans *trans,
318 struct netlink_ext_ack *extack)
320 struct dsa_port *dp = dsa_slave_to_port(dev);
323 /* For the prepare phase, ensure the full set of changes is feasable in
324 * one go in order to signal a failure properly. If an operation is not
325 * supported, return -EOPNOTSUPP.
329 case SWITCHDEV_OBJ_ID_PORT_MDB:
330 if (obj->orig_dev != dev)
332 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans);
334 case SWITCHDEV_OBJ_ID_HOST_MDB:
335 /* DSA can directly translate this to a normal MDB add,
336 * but on the CPU port.
338 err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj),
341 case SWITCHDEV_OBJ_ID_PORT_VLAN:
342 if (obj->orig_dev != dev)
344 err = dsa_port_vlan_add(dp, SWITCHDEV_OBJ_PORT_VLAN(obj),
355 static int dsa_slave_port_obj_del(struct net_device *dev,
356 const struct switchdev_obj *obj)
358 struct dsa_port *dp = dsa_slave_to_port(dev);
362 case SWITCHDEV_OBJ_ID_PORT_MDB:
363 if (obj->orig_dev != dev)
365 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
367 case SWITCHDEV_OBJ_ID_HOST_MDB:
368 /* DSA can directly translate this to a normal MDB add,
369 * but on the CPU port.
371 err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj));
373 case SWITCHDEV_OBJ_ID_PORT_VLAN:
374 if (obj->orig_dev != dev)
376 err = dsa_port_vlan_del(dp, SWITCHDEV_OBJ_PORT_VLAN(obj));
386 static int dsa_slave_get_port_parent_id(struct net_device *dev,
387 struct netdev_phys_item_id *ppid)
389 struct dsa_port *dp = dsa_slave_to_port(dev);
390 struct dsa_switch *ds = dp->ds;
391 struct dsa_switch_tree *dst = ds->dst;
393 /* For non-legacy ports, devlink is used and it takes
394 * care of the name generation. This ndo implementation
395 * should be removed with legacy support.
400 ppid->id_len = sizeof(dst->index);
401 memcpy(&ppid->id, &dst->index, ppid->id_len);
406 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
409 #ifdef CONFIG_NET_POLL_CONTROLLER
410 struct dsa_slave_priv *p = netdev_priv(dev);
413 netpoll_send_skb(p->netpoll, skb);
420 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
423 struct dsa_switch *ds = p->dp->ds;
424 struct sk_buff *clone;
427 type = ptp_classify_raw(skb);
428 if (type == PTP_CLASS_NONE)
431 if (!ds->ops->port_txtstamp)
434 clone = skb_clone_sk(skb);
438 DSA_SKB_CB(skb)->clone = clone;
440 if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type))
446 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
448 /* SKB for netpoll still need to be mangled with the protocol-specific
449 * tag to be successfully transmitted
451 if (unlikely(netpoll_tx_running(dev)))
452 return dsa_slave_netpoll_send_skb(dev, skb);
454 /* Queue the SKB for transmission on the parent interface, but
455 * do not modify its EtherType
457 skb->dev = dsa_slave_to_master(dev);
462 EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
464 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
466 struct dsa_slave_priv *p = netdev_priv(dev);
467 struct pcpu_sw_netstats *s;
468 struct sk_buff *nskb;
470 s = this_cpu_ptr(p->stats64);
471 u64_stats_update_begin(&s->syncp);
473 s->tx_bytes += skb->len;
474 u64_stats_update_end(&s->syncp);
476 DSA_SKB_CB(skb)->deferred_xmit = false;
477 DSA_SKB_CB(skb)->clone = NULL;
479 /* Identify PTP protocol packets, clone them, and pass them to the
482 dsa_skb_tx_timestamp(p, skb);
484 /* Transmit function may have to reallocate the original SKB,
485 * in which case it must have freed it. Only free it here on error.
487 nskb = p->xmit(skb, dev);
489 if (!DSA_SKB_CB(skb)->deferred_xmit)
494 return dsa_enqueue_skb(nskb, dev);
497 void *dsa_defer_xmit(struct sk_buff *skb, struct net_device *dev)
499 struct dsa_port *dp = dsa_slave_to_port(dev);
501 DSA_SKB_CB(skb)->deferred_xmit = true;
503 skb_queue_tail(&dp->xmit_queue, skb);
504 schedule_work(&dp->xmit_work);
507 EXPORT_SYMBOL_GPL(dsa_defer_xmit);
509 static void dsa_port_xmit_work(struct work_struct *work)
511 struct dsa_port *dp = container_of(work, struct dsa_port, xmit_work);
512 struct dsa_switch *ds = dp->ds;
515 if (unlikely(!ds->ops->port_deferred_xmit))
518 while ((skb = skb_dequeue(&dp->xmit_queue)) != NULL)
519 ds->ops->port_deferred_xmit(ds, dp->index, skb);
522 /* ethtool operations *******************************************************/
524 static void dsa_slave_get_drvinfo(struct net_device *dev,
525 struct ethtool_drvinfo *drvinfo)
527 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
528 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
529 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
532 static int dsa_slave_get_regs_len(struct net_device *dev)
534 struct dsa_port *dp = dsa_slave_to_port(dev);
535 struct dsa_switch *ds = dp->ds;
537 if (ds->ops->get_regs_len)
538 return ds->ops->get_regs_len(ds, dp->index);
544 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
546 struct dsa_port *dp = dsa_slave_to_port(dev);
547 struct dsa_switch *ds = dp->ds;
549 if (ds->ops->get_regs)
550 ds->ops->get_regs(ds, dp->index, regs, _p);
553 static int dsa_slave_nway_reset(struct net_device *dev)
555 struct dsa_port *dp = dsa_slave_to_port(dev);
557 return phylink_ethtool_nway_reset(dp->pl);
560 static int dsa_slave_get_eeprom_len(struct net_device *dev)
562 struct dsa_port *dp = dsa_slave_to_port(dev);
563 struct dsa_switch *ds = dp->ds;
565 if (ds->cd && ds->cd->eeprom_len)
566 return ds->cd->eeprom_len;
568 if (ds->ops->get_eeprom_len)
569 return ds->ops->get_eeprom_len(ds);
574 static int dsa_slave_get_eeprom(struct net_device *dev,
575 struct ethtool_eeprom *eeprom, u8 *data)
577 struct dsa_port *dp = dsa_slave_to_port(dev);
578 struct dsa_switch *ds = dp->ds;
580 if (ds->ops->get_eeprom)
581 return ds->ops->get_eeprom(ds, eeprom, data);
586 static int dsa_slave_set_eeprom(struct net_device *dev,
587 struct ethtool_eeprom *eeprom, u8 *data)
589 struct dsa_port *dp = dsa_slave_to_port(dev);
590 struct dsa_switch *ds = dp->ds;
592 if (ds->ops->set_eeprom)
593 return ds->ops->set_eeprom(ds, eeprom, data);
598 static void dsa_slave_get_strings(struct net_device *dev,
599 uint32_t stringset, uint8_t *data)
601 struct dsa_port *dp = dsa_slave_to_port(dev);
602 struct dsa_switch *ds = dp->ds;
604 if (stringset == ETH_SS_STATS) {
605 int len = ETH_GSTRING_LEN;
607 strncpy(data, "tx_packets", len);
608 strncpy(data + len, "tx_bytes", len);
609 strncpy(data + 2 * len, "rx_packets", len);
610 strncpy(data + 3 * len, "rx_bytes", len);
611 if (ds->ops->get_strings)
612 ds->ops->get_strings(ds, dp->index, stringset,
617 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
618 struct ethtool_stats *stats,
621 struct dsa_port *dp = dsa_slave_to_port(dev);
622 struct dsa_slave_priv *p = netdev_priv(dev);
623 struct dsa_switch *ds = dp->ds;
624 struct pcpu_sw_netstats *s;
628 for_each_possible_cpu(i) {
629 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
631 s = per_cpu_ptr(p->stats64, i);
633 start = u64_stats_fetch_begin_irq(&s->syncp);
634 tx_packets = s->tx_packets;
635 tx_bytes = s->tx_bytes;
636 rx_packets = s->rx_packets;
637 rx_bytes = s->rx_bytes;
638 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
639 data[0] += tx_packets;
641 data[2] += rx_packets;
644 if (ds->ops->get_ethtool_stats)
645 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
648 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
650 struct dsa_port *dp = dsa_slave_to_port(dev);
651 struct dsa_switch *ds = dp->ds;
653 if (sset == ETH_SS_STATS) {
657 if (ds->ops->get_sset_count)
658 count += ds->ops->get_sset_count(ds, dp->index, sset);
666 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
668 struct dsa_port *dp = dsa_slave_to_port(dev);
669 struct dsa_switch *ds = dp->ds;
671 phylink_ethtool_get_wol(dp->pl, w);
673 if (ds->ops->get_wol)
674 ds->ops->get_wol(ds, dp->index, w);
677 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
679 struct dsa_port *dp = dsa_slave_to_port(dev);
680 struct dsa_switch *ds = dp->ds;
681 int ret = -EOPNOTSUPP;
683 phylink_ethtool_set_wol(dp->pl, w);
685 if (ds->ops->set_wol)
686 ret = ds->ops->set_wol(ds, dp->index, w);
691 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
693 struct dsa_port *dp = dsa_slave_to_port(dev);
694 struct dsa_switch *ds = dp->ds;
697 /* Port's PHY and MAC both need to be EEE capable */
698 if (!dev->phydev || !dp->pl)
701 if (!ds->ops->set_mac_eee)
704 ret = ds->ops->set_mac_eee(ds, dp->index, e);
708 return phylink_ethtool_set_eee(dp->pl, e);
711 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
713 struct dsa_port *dp = dsa_slave_to_port(dev);
714 struct dsa_switch *ds = dp->ds;
717 /* Port's PHY and MAC both need to be EEE capable */
718 if (!dev->phydev || !dp->pl)
721 if (!ds->ops->get_mac_eee)
724 ret = ds->ops->get_mac_eee(ds, dp->index, e);
728 return phylink_ethtool_get_eee(dp->pl, e);
731 static int dsa_slave_get_link_ksettings(struct net_device *dev,
732 struct ethtool_link_ksettings *cmd)
734 struct dsa_port *dp = dsa_slave_to_port(dev);
736 return phylink_ethtool_ksettings_get(dp->pl, cmd);
739 static int dsa_slave_set_link_ksettings(struct net_device *dev,
740 const struct ethtool_link_ksettings *cmd)
742 struct dsa_port *dp = dsa_slave_to_port(dev);
744 return phylink_ethtool_ksettings_set(dp->pl, cmd);
747 #ifdef CONFIG_NET_POLL_CONTROLLER
748 static int dsa_slave_netpoll_setup(struct net_device *dev,
749 struct netpoll_info *ni)
751 struct net_device *master = dsa_slave_to_master(dev);
752 struct dsa_slave_priv *p = netdev_priv(dev);
753 struct netpoll *netpoll;
756 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
760 err = __netpoll_setup(netpoll, master);
766 p->netpoll = netpoll;
771 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
773 struct dsa_slave_priv *p = netdev_priv(dev);
774 struct netpoll *netpoll = p->netpoll;
781 __netpoll_free(netpoll);
784 static void dsa_slave_poll_controller(struct net_device *dev)
789 static int dsa_slave_get_phys_port_name(struct net_device *dev,
790 char *name, size_t len)
792 struct dsa_port *dp = dsa_slave_to_port(dev);
794 /* For non-legacy ports, devlink is used and it takes
795 * care of the name generation. This ndo implementation
796 * should be removed with legacy support.
801 if (snprintf(name, len, "p%d", dp->index) >= len)
807 static struct dsa_mall_tc_entry *
808 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
810 struct dsa_slave_priv *p = netdev_priv(dev);
811 struct dsa_mall_tc_entry *mall_tc_entry;
813 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
814 if (mall_tc_entry->cookie == cookie)
815 return mall_tc_entry;
820 static int dsa_slave_add_cls_matchall(struct net_device *dev,
821 struct tc_cls_matchall_offload *cls,
824 struct dsa_port *dp = dsa_slave_to_port(dev);
825 struct dsa_slave_priv *p = netdev_priv(dev);
826 struct dsa_mall_tc_entry *mall_tc_entry;
827 __be16 protocol = cls->common.protocol;
828 struct dsa_switch *ds = dp->ds;
829 struct flow_action_entry *act;
830 struct dsa_port *to_dp;
831 int err = -EOPNOTSUPP;
833 if (!ds->ops->port_mirror_add)
836 if (!flow_offload_has_one_action(&cls->rule->action))
839 act = &cls->rule->action.entries[0];
841 if (act->id == FLOW_ACTION_MIRRED && protocol == htons(ETH_P_ALL)) {
842 struct dsa_mall_mirror_tc_entry *mirror;
847 if (!dsa_slave_dev_check(act->dev))
850 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
854 mall_tc_entry->cookie = cls->cookie;
855 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
856 mirror = &mall_tc_entry->mirror;
858 to_dp = dsa_slave_to_port(act->dev);
860 mirror->to_local_port = to_dp->index;
861 mirror->ingress = ingress;
863 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
865 kfree(mall_tc_entry);
869 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
875 static void dsa_slave_del_cls_matchall(struct net_device *dev,
876 struct tc_cls_matchall_offload *cls)
878 struct dsa_port *dp = dsa_slave_to_port(dev);
879 struct dsa_mall_tc_entry *mall_tc_entry;
880 struct dsa_switch *ds = dp->ds;
882 if (!ds->ops->port_mirror_del)
885 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
889 list_del(&mall_tc_entry->list);
891 switch (mall_tc_entry->type) {
892 case DSA_PORT_MALL_MIRROR:
893 ds->ops->port_mirror_del(ds, dp->index, &mall_tc_entry->mirror);
899 kfree(mall_tc_entry);
902 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
903 struct tc_cls_matchall_offload *cls,
906 if (cls->common.chain_index)
909 switch (cls->command) {
910 case TC_CLSMATCHALL_REPLACE:
911 return dsa_slave_add_cls_matchall(dev, cls, ingress);
912 case TC_CLSMATCHALL_DESTROY:
913 dsa_slave_del_cls_matchall(dev, cls);
920 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
921 void *cb_priv, bool ingress)
923 struct net_device *dev = cb_priv;
925 if (!tc_can_offload(dev))
929 case TC_SETUP_CLSMATCHALL:
930 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
936 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
937 void *type_data, void *cb_priv)
939 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
942 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
943 void *type_data, void *cb_priv)
945 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
948 static LIST_HEAD(dsa_slave_block_cb_list);
950 static int dsa_slave_setup_tc_block(struct net_device *dev,
951 struct flow_block_offload *f)
953 struct flow_block_cb *block_cb;
956 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
957 cb = dsa_slave_setup_tc_block_cb_ig;
958 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
959 cb = dsa_slave_setup_tc_block_cb_eg;
963 f->driver_block_list = &dsa_slave_block_cb_list;
965 switch (f->command) {
966 case FLOW_BLOCK_BIND:
967 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list))
970 block_cb = flow_block_cb_alloc(f->net, cb, dev, dev, NULL);
971 if (IS_ERR(block_cb))
972 return PTR_ERR(block_cb);
974 flow_block_cb_add(block_cb, f);
975 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list);
977 case FLOW_BLOCK_UNBIND:
978 block_cb = flow_block_cb_lookup(f, cb, dev);
982 flow_block_cb_remove(block_cb, f);
983 list_del(&block_cb->driver_list);
990 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
995 return dsa_slave_setup_tc_block(dev, type_data);
1001 static void dsa_slave_get_stats64(struct net_device *dev,
1002 struct rtnl_link_stats64 *stats)
1004 struct dsa_slave_priv *p = netdev_priv(dev);
1005 struct pcpu_sw_netstats *s;
1009 netdev_stats_to_stats64(stats, &dev->stats);
1010 for_each_possible_cpu(i) {
1011 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
1013 s = per_cpu_ptr(p->stats64, i);
1015 start = u64_stats_fetch_begin_irq(&s->syncp);
1016 tx_packets = s->tx_packets;
1017 tx_bytes = s->tx_bytes;
1018 rx_packets = s->rx_packets;
1019 rx_bytes = s->rx_bytes;
1020 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
1022 stats->tx_packets += tx_packets;
1023 stats->tx_bytes += tx_bytes;
1024 stats->rx_packets += rx_packets;
1025 stats->rx_bytes += rx_bytes;
1029 static int dsa_slave_get_rxnfc(struct net_device *dev,
1030 struct ethtool_rxnfc *nfc, u32 *rule_locs)
1032 struct dsa_port *dp = dsa_slave_to_port(dev);
1033 struct dsa_switch *ds = dp->ds;
1035 if (!ds->ops->get_rxnfc)
1038 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
1041 static int dsa_slave_set_rxnfc(struct net_device *dev,
1042 struct ethtool_rxnfc *nfc)
1044 struct dsa_port *dp = dsa_slave_to_port(dev);
1045 struct dsa_switch *ds = dp->ds;
1047 if (!ds->ops->set_rxnfc)
1050 return ds->ops->set_rxnfc(ds, dp->index, nfc);
1053 static int dsa_slave_get_ts_info(struct net_device *dev,
1054 struct ethtool_ts_info *ts)
1056 struct dsa_slave_priv *p = netdev_priv(dev);
1057 struct dsa_switch *ds = p->dp->ds;
1059 if (!ds->ops->get_ts_info)
1062 return ds->ops->get_ts_info(ds, p->dp->index, ts);
1065 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
1068 struct dsa_port *dp = dsa_slave_to_port(dev);
1069 struct bridge_vlan_info info;
1072 /* Check for a possible bridge VLAN entry now since there is no
1073 * need to emulate the switchdev prepare + commit phase.
1075 if (dp->bridge_dev) {
1076 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
1077 * device, respectively the VID is not found, returning
1078 * 0 means success, which is a failure for us here.
1080 ret = br_vlan_get_info(dp->bridge_dev, vid, &info);
1085 /* This API only allows programming tagged, non-PVID VIDs */
1086 return dsa_port_vid_add(dp, vid, 0);
1089 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
1092 struct dsa_port *dp = dsa_slave_to_port(dev);
1093 struct bridge_vlan_info info;
1096 /* Check for a possible bridge VLAN entry now since there is no
1097 * need to emulate the switchdev prepare + commit phase.
1099 if (dp->bridge_dev) {
1100 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
1101 * device, respectively the VID is not found, returning
1102 * 0 means success, which is a failure for us here.
1104 ret = br_vlan_get_info(dp->bridge_dev, vid, &info);
1109 ret = dsa_port_vid_del(dp, vid);
1110 if (ret == -EOPNOTSUPP)
1116 static const struct ethtool_ops dsa_slave_ethtool_ops = {
1117 .get_drvinfo = dsa_slave_get_drvinfo,
1118 .get_regs_len = dsa_slave_get_regs_len,
1119 .get_regs = dsa_slave_get_regs,
1120 .nway_reset = dsa_slave_nway_reset,
1121 .get_link = ethtool_op_get_link,
1122 .get_eeprom_len = dsa_slave_get_eeprom_len,
1123 .get_eeprom = dsa_slave_get_eeprom,
1124 .set_eeprom = dsa_slave_set_eeprom,
1125 .get_strings = dsa_slave_get_strings,
1126 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
1127 .get_sset_count = dsa_slave_get_sset_count,
1128 .set_wol = dsa_slave_set_wol,
1129 .get_wol = dsa_slave_get_wol,
1130 .set_eee = dsa_slave_set_eee,
1131 .get_eee = dsa_slave_get_eee,
1132 .get_link_ksettings = dsa_slave_get_link_ksettings,
1133 .set_link_ksettings = dsa_slave_set_link_ksettings,
1134 .get_rxnfc = dsa_slave_get_rxnfc,
1135 .set_rxnfc = dsa_slave_set_rxnfc,
1136 .get_ts_info = dsa_slave_get_ts_info,
1139 /* legacy way, bypassing the bridge *****************************************/
1140 int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
1141 struct net_device *dev,
1142 const unsigned char *addr, u16 vid,
1144 struct netlink_ext_ack *extack)
1146 struct dsa_port *dp = dsa_slave_to_port(dev);
1148 return dsa_port_fdb_add(dp, addr, vid);
1151 int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
1152 struct net_device *dev,
1153 const unsigned char *addr, u16 vid)
1155 struct dsa_port *dp = dsa_slave_to_port(dev);
1157 return dsa_port_fdb_del(dp, addr, vid);
1160 static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
1162 struct dsa_port *dp = dsa_slave_to_port(dev);
1164 return dp->ds->devlink ? &dp->devlink_port : NULL;
1167 static const struct net_device_ops dsa_slave_netdev_ops = {
1168 .ndo_open = dsa_slave_open,
1169 .ndo_stop = dsa_slave_close,
1170 .ndo_start_xmit = dsa_slave_xmit,
1171 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
1172 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
1173 .ndo_set_mac_address = dsa_slave_set_mac_address,
1174 .ndo_fdb_add = dsa_legacy_fdb_add,
1175 .ndo_fdb_del = dsa_legacy_fdb_del,
1176 .ndo_fdb_dump = dsa_slave_fdb_dump,
1177 .ndo_do_ioctl = dsa_slave_ioctl,
1178 .ndo_get_iflink = dsa_slave_get_iflink,
1179 #ifdef CONFIG_NET_POLL_CONTROLLER
1180 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
1181 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
1182 .ndo_poll_controller = dsa_slave_poll_controller,
1184 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
1185 .ndo_setup_tc = dsa_slave_setup_tc,
1186 .ndo_get_stats64 = dsa_slave_get_stats64,
1187 .ndo_get_port_parent_id = dsa_slave_get_port_parent_id,
1188 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
1189 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
1190 .ndo_get_devlink_port = dsa_slave_get_devlink_port,
1193 static struct device_type dsa_type = {
1197 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
1199 const struct dsa_port *dp = dsa_to_port(ds, port);
1201 phylink_mac_change(dp->pl, up);
1203 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
1205 static void dsa_slave_phylink_fixed_state(struct net_device *dev,
1206 struct phylink_link_state *state)
1208 struct dsa_port *dp = dsa_slave_to_port(dev);
1209 struct dsa_switch *ds = dp->ds;
1211 /* No need to check that this operation is valid, the callback would
1212 * not be called if it was not.
1214 ds->ops->phylink_fixed_state(ds, dp->index, state);
1217 /* slave device setup *******************************************************/
1218 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
1220 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1221 struct dsa_switch *ds = dp->ds;
1223 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
1224 if (!slave_dev->phydev) {
1225 netdev_err(slave_dev, "no phy at %d\n", addr);
1229 return phylink_connect_phy(dp->pl, slave_dev->phydev);
1232 static int dsa_slave_phy_setup(struct net_device *slave_dev)
1234 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1235 struct device_node *port_dn = dp->dn;
1236 struct dsa_switch *ds = dp->ds;
1240 mode = of_get_phy_mode(port_dn);
1242 mode = PHY_INTERFACE_MODE_NA;
1244 dp->pl_config.dev = &slave_dev->dev;
1245 dp->pl_config.type = PHYLINK_NETDEV;
1247 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode,
1248 &dsa_port_phylink_mac_ops);
1249 if (IS_ERR(dp->pl)) {
1250 netdev_err(slave_dev,
1251 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1252 return PTR_ERR(dp->pl);
1255 /* Register only if the switch provides such a callback, since this
1256 * callback takes precedence over polling the link GPIO in PHYLINK
1257 * (see phylink_get_fixed_state).
1259 if (ds->ops->phylink_fixed_state)
1260 phylink_fixed_state_cb(dp->pl, dsa_slave_phylink_fixed_state);
1262 if (ds->ops->get_phy_flags)
1263 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
1265 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
1266 if (ret == -ENODEV && ds->slave_mii_bus) {
1267 /* We could not connect to a designated PHY or SFP, so try to
1268 * use the switch internal MDIO bus instead
1270 ret = dsa_slave_phy_connect(slave_dev, dp->index);
1272 netdev_err(slave_dev,
1273 "failed to connect to port %d: %d\n",
1275 phylink_destroy(dp->pl);
1283 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1284 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1285 struct netdev_queue *txq,
1288 lockdep_set_class(&txq->_xmit_lock,
1289 &dsa_slave_netdev_xmit_lock_key);
1292 int dsa_slave_suspend(struct net_device *slave_dev)
1294 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1296 if (!netif_running(slave_dev))
1299 cancel_work_sync(&dp->xmit_work);
1300 skb_queue_purge(&dp->xmit_queue);
1302 netif_device_detach(slave_dev);
1305 phylink_stop(dp->pl);
1311 int dsa_slave_resume(struct net_device *slave_dev)
1313 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1315 if (!netif_running(slave_dev))
1318 netif_device_attach(slave_dev);
1321 phylink_start(dp->pl);
1327 static void dsa_slave_notify(struct net_device *dev, unsigned long val)
1329 struct net_device *master = dsa_slave_to_master(dev);
1330 struct dsa_port *dp = dsa_slave_to_port(dev);
1331 struct dsa_notifier_register_info rinfo = {
1332 .switch_number = dp->ds->index,
1333 .port_number = dp->index,
1338 call_dsa_notifiers(val, dev, &rinfo.info);
1341 int dsa_slave_create(struct dsa_port *port)
1343 const struct dsa_port *cpu_dp = port->cpu_dp;
1344 struct net_device *master = cpu_dp->master;
1345 struct dsa_switch *ds = port->ds;
1346 const char *name = port->name;
1347 struct net_device *slave_dev;
1348 struct dsa_slave_priv *p;
1351 if (!ds->num_tx_queues)
1352 ds->num_tx_queues = 1;
1354 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
1355 NET_NAME_UNKNOWN, ether_setup,
1356 ds->num_tx_queues, 1);
1357 if (slave_dev == NULL)
1360 slave_dev->features = master->vlan_features | NETIF_F_HW_TC |
1361 NETIF_F_HW_VLAN_CTAG_FILTER;
1362 slave_dev->hw_features |= NETIF_F_HW_TC;
1363 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1364 if (!IS_ERR_OR_NULL(port->mac))
1365 ether_addr_copy(slave_dev->dev_addr, port->mac);
1367 eth_hw_addr_inherit(slave_dev, master);
1368 slave_dev->priv_flags |= IFF_NO_QUEUE;
1369 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1370 slave_dev->min_mtu = 0;
1371 slave_dev->max_mtu = ETH_MAX_MTU;
1372 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1374 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1377 SET_NETDEV_DEV(slave_dev, port->ds->dev);
1378 slave_dev->dev.of_node = port->dn;
1379 slave_dev->vlan_features = master->vlan_features;
1381 p = netdev_priv(slave_dev);
1382 p->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1384 free_netdev(slave_dev);
1388 INIT_LIST_HEAD(&p->mall_tc_list);
1389 INIT_WORK(&port->xmit_work, dsa_port_xmit_work);
1390 skb_queue_head_init(&port->xmit_queue);
1391 p->xmit = cpu_dp->tag_ops->xmit;
1392 port->slave = slave_dev;
1394 netif_carrier_off(slave_dev);
1396 ret = dsa_slave_phy_setup(slave_dev);
1398 netdev_err(master, "error %d setting up slave phy\n", ret);
1402 dsa_slave_notify(slave_dev, DSA_PORT_REGISTER);
1404 ret = register_netdev(slave_dev);
1406 netdev_err(master, "error %d registering interface %s\n",
1407 ret, slave_dev->name);
1415 phylink_disconnect_phy(p->dp->pl);
1417 phylink_destroy(p->dp->pl);
1419 free_percpu(p->stats64);
1420 free_netdev(slave_dev);
1425 void dsa_slave_destroy(struct net_device *slave_dev)
1427 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1428 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1430 netif_carrier_off(slave_dev);
1432 phylink_disconnect_phy(dp->pl);
1435 dsa_slave_notify(slave_dev, DSA_PORT_UNREGISTER);
1436 unregister_netdev(slave_dev);
1437 phylink_destroy(dp->pl);
1438 free_percpu(p->stats64);
1439 free_netdev(slave_dev);
1442 static bool dsa_slave_dev_check(const struct net_device *dev)
1444 return dev->netdev_ops == &dsa_slave_netdev_ops;
1447 static int dsa_slave_changeupper(struct net_device *dev,
1448 struct netdev_notifier_changeupper_info *info)
1450 struct dsa_port *dp = dsa_slave_to_port(dev);
1451 int err = NOTIFY_DONE;
1453 if (netif_is_bridge_master(info->upper_dev)) {
1454 if (info->linking) {
1455 err = dsa_port_bridge_join(dp, info->upper_dev);
1456 err = notifier_from_errno(err);
1458 dsa_port_bridge_leave(dp, info->upper_dev);
1466 static int dsa_slave_upper_vlan_check(struct net_device *dev,
1467 struct netdev_notifier_changeupper_info *
1470 struct netlink_ext_ack *ext_ack;
1471 struct net_device *slave;
1472 struct dsa_port *dp;
1474 ext_ack = netdev_notifier_info_to_extack(&info->info);
1476 if (!is_vlan_dev(dev))
1479 slave = vlan_dev_real_dev(dev);
1480 if (!dsa_slave_dev_check(slave))
1483 dp = dsa_slave_to_port(slave);
1484 if (!dp->bridge_dev)
1487 /* Deny enslaving a VLAN device into a VLAN-aware bridge */
1488 if (br_vlan_enabled(dp->bridge_dev) &&
1489 netif_is_bridge_master(info->upper_dev) && info->linking) {
1490 NL_SET_ERR_MSG_MOD(ext_ack,
1491 "Cannot enslave VLAN device into VLAN aware bridge");
1492 return notifier_from_errno(-EINVAL);
1498 static int dsa_slave_netdevice_event(struct notifier_block *nb,
1499 unsigned long event, void *ptr)
1501 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1503 if (event == NETDEV_CHANGEUPPER) {
1504 if (!dsa_slave_dev_check(dev))
1505 return dsa_slave_upper_vlan_check(dev, ptr);
1507 return dsa_slave_changeupper(dev, ptr);
1513 struct dsa_switchdev_event_work {
1514 struct work_struct work;
1515 struct switchdev_notifier_fdb_info fdb_info;
1516 struct net_device *dev;
1517 unsigned long event;
1520 static void dsa_slave_switchdev_event_work(struct work_struct *work)
1522 struct dsa_switchdev_event_work *switchdev_work =
1523 container_of(work, struct dsa_switchdev_event_work, work);
1524 struct net_device *dev = switchdev_work->dev;
1525 struct switchdev_notifier_fdb_info *fdb_info;
1526 struct dsa_port *dp = dsa_slave_to_port(dev);
1530 switch (switchdev_work->event) {
1531 case SWITCHDEV_FDB_ADD_TO_DEVICE:
1532 fdb_info = &switchdev_work->fdb_info;
1533 if (!fdb_info->added_by_user)
1536 err = dsa_port_fdb_add(dp, fdb_info->addr, fdb_info->vid);
1538 netdev_dbg(dev, "fdb add failed err=%d\n", err);
1541 fdb_info->offloaded = true;
1542 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, dev,
1543 &fdb_info->info, NULL);
1546 case SWITCHDEV_FDB_DEL_TO_DEVICE:
1547 fdb_info = &switchdev_work->fdb_info;
1548 if (!fdb_info->added_by_user)
1551 err = dsa_port_fdb_del(dp, fdb_info->addr, fdb_info->vid);
1553 netdev_dbg(dev, "fdb del failed err=%d\n", err);
1560 kfree(switchdev_work->fdb_info.addr);
1561 kfree(switchdev_work);
1566 dsa_slave_switchdev_fdb_work_init(struct dsa_switchdev_event_work *
1568 const struct switchdev_notifier_fdb_info *
1571 memcpy(&switchdev_work->fdb_info, fdb_info,
1572 sizeof(switchdev_work->fdb_info));
1573 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
1574 if (!switchdev_work->fdb_info.addr)
1576 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
1581 /* Called under rcu_read_lock() */
1582 static int dsa_slave_switchdev_event(struct notifier_block *unused,
1583 unsigned long event, void *ptr)
1585 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
1586 struct dsa_switchdev_event_work *switchdev_work;
1589 if (event == SWITCHDEV_PORT_ATTR_SET) {
1590 err = switchdev_handle_port_attr_set(dev, ptr,
1591 dsa_slave_dev_check,
1592 dsa_slave_port_attr_set);
1593 return notifier_from_errno(err);
1596 if (!dsa_slave_dev_check(dev))
1599 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
1600 if (!switchdev_work)
1603 INIT_WORK(&switchdev_work->work,
1604 dsa_slave_switchdev_event_work);
1605 switchdev_work->dev = dev;
1606 switchdev_work->event = event;
1609 case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */
1610 case SWITCHDEV_FDB_DEL_TO_DEVICE:
1611 if (dsa_slave_switchdev_fdb_work_init(switchdev_work, ptr))
1612 goto err_fdb_work_init;
1616 kfree(switchdev_work);
1620 dsa_schedule_work(&switchdev_work->work);
1624 kfree(switchdev_work);
1628 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
1629 unsigned long event, void *ptr)
1631 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
1635 case SWITCHDEV_PORT_OBJ_ADD:
1636 err = switchdev_handle_port_obj_add(dev, ptr,
1637 dsa_slave_dev_check,
1638 dsa_slave_port_obj_add);
1639 return notifier_from_errno(err);
1640 case SWITCHDEV_PORT_OBJ_DEL:
1641 err = switchdev_handle_port_obj_del(dev, ptr,
1642 dsa_slave_dev_check,
1643 dsa_slave_port_obj_del);
1644 return notifier_from_errno(err);
1645 case SWITCHDEV_PORT_ATTR_SET:
1646 err = switchdev_handle_port_attr_set(dev, ptr,
1647 dsa_slave_dev_check,
1648 dsa_slave_port_attr_set);
1649 return notifier_from_errno(err);
1655 static struct notifier_block dsa_slave_nb __read_mostly = {
1656 .notifier_call = dsa_slave_netdevice_event,
1659 static struct notifier_block dsa_slave_switchdev_notifier = {
1660 .notifier_call = dsa_slave_switchdev_event,
1663 static struct notifier_block dsa_slave_switchdev_blocking_notifier = {
1664 .notifier_call = dsa_slave_switchdev_blocking_event,
1667 int dsa_slave_register_notifier(void)
1669 struct notifier_block *nb;
1672 err = register_netdevice_notifier(&dsa_slave_nb);
1676 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
1678 goto err_switchdev_nb;
1680 nb = &dsa_slave_switchdev_blocking_notifier;
1681 err = register_switchdev_blocking_notifier(nb);
1683 goto err_switchdev_blocking_nb;
1687 err_switchdev_blocking_nb:
1688 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
1690 unregister_netdevice_notifier(&dsa_slave_nb);
1694 void dsa_slave_unregister_notifier(void)
1696 struct notifier_block *nb;
1699 nb = &dsa_slave_switchdev_blocking_notifier;
1700 err = unregister_switchdev_blocking_notifier(nb);
1702 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
1704 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
1706 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
1708 err = unregister_netdevice_notifier(&dsa_slave_nb);
1710 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);