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 /* slave mii_bus handling ***************************************************/
26 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
28 struct dsa_switch *ds = bus->priv;
30 if (ds->phys_mii_mask & (1 << addr))
31 return ds->ops->phy_read(ds, addr, reg);
36 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
38 struct dsa_switch *ds = bus->priv;
40 if (ds->phys_mii_mask & (1 << addr))
41 return ds->ops->phy_write(ds, addr, reg, val);
46 void dsa_slave_mii_bus_init(struct dsa_switch *ds)
48 ds->slave_mii_bus->priv = (void *)ds;
49 ds->slave_mii_bus->name = "dsa slave smi";
50 ds->slave_mii_bus->read = dsa_slave_phy_read;
51 ds->slave_mii_bus->write = dsa_slave_phy_write;
52 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
53 ds->dst->index, ds->index);
54 ds->slave_mii_bus->parent = ds->dev;
55 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
59 /* slave device handling ****************************************************/
60 static int dsa_slave_get_iflink(const struct net_device *dev)
62 return dsa_slave_to_master(dev)->ifindex;
65 static int dsa_slave_open(struct net_device *dev)
67 struct net_device *master = dsa_slave_to_master(dev);
68 struct dsa_port *dp = dsa_slave_to_port(dev);
71 err = dev_open(master, NULL);
73 netdev_err(dev, "failed to open master %s\n", master->name);
77 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
78 err = dev_uc_add(master, dev->dev_addr);
83 if (dev->flags & IFF_ALLMULTI) {
84 err = dev_set_allmulti(master, 1);
88 if (dev->flags & IFF_PROMISC) {
89 err = dev_set_promiscuity(master, 1);
94 err = dsa_port_enable_rt(dp, dev->phydev);
101 if (dev->flags & IFF_PROMISC)
102 dev_set_promiscuity(master, -1);
104 if (dev->flags & IFF_ALLMULTI)
105 dev_set_allmulti(master, -1);
107 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
108 dev_uc_del(master, dev->dev_addr);
113 static int dsa_slave_close(struct net_device *dev)
115 struct net_device *master = dsa_slave_to_master(dev);
116 struct dsa_port *dp = dsa_slave_to_port(dev);
118 dsa_port_disable_rt(dp);
120 dev_mc_unsync(master, dev);
121 dev_uc_unsync(master, dev);
122 if (dev->flags & IFF_ALLMULTI)
123 dev_set_allmulti(master, -1);
124 if (dev->flags & IFF_PROMISC)
125 dev_set_promiscuity(master, -1);
127 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
128 dev_uc_del(master, dev->dev_addr);
133 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
135 struct net_device *master = dsa_slave_to_master(dev);
136 if (dev->flags & IFF_UP) {
137 if (change & IFF_ALLMULTI)
138 dev_set_allmulti(master,
139 dev->flags & IFF_ALLMULTI ? 1 : -1);
140 if (change & IFF_PROMISC)
141 dev_set_promiscuity(master,
142 dev->flags & IFF_PROMISC ? 1 : -1);
146 static void dsa_slave_set_rx_mode(struct net_device *dev)
148 struct net_device *master = dsa_slave_to_master(dev);
150 dev_mc_sync(master, dev);
151 dev_uc_sync(master, dev);
154 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
156 struct net_device *master = dsa_slave_to_master(dev);
157 struct sockaddr *addr = a;
160 if (!is_valid_ether_addr(addr->sa_data))
161 return -EADDRNOTAVAIL;
163 if (!(dev->flags & IFF_UP))
166 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
167 err = dev_uc_add(master, addr->sa_data);
172 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
173 dev_uc_del(master, dev->dev_addr);
176 ether_addr_copy(dev->dev_addr, addr->sa_data);
181 struct dsa_slave_dump_ctx {
182 struct net_device *dev;
184 struct netlink_callback *cb;
189 dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid,
190 bool is_static, void *data)
192 struct dsa_slave_dump_ctx *dump = data;
193 u32 portid = NETLINK_CB(dump->cb->skb).portid;
194 u32 seq = dump->cb->nlh->nlmsg_seq;
195 struct nlmsghdr *nlh;
198 if (dump->idx < dump->cb->args[2])
201 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
202 sizeof(*ndm), NLM_F_MULTI);
206 ndm = nlmsg_data(nlh);
207 ndm->ndm_family = AF_BRIDGE;
210 ndm->ndm_flags = NTF_SELF;
212 ndm->ndm_ifindex = dump->dev->ifindex;
213 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
215 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
216 goto nla_put_failure;
218 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
219 goto nla_put_failure;
221 nlmsg_end(dump->skb, nlh);
228 nlmsg_cancel(dump->skb, nlh);
233 dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
234 struct net_device *dev, struct net_device *filter_dev,
237 struct dsa_port *dp = dsa_slave_to_port(dev);
238 struct dsa_slave_dump_ctx dump = {
246 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump);
252 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
254 struct dsa_slave_priv *p = netdev_priv(dev);
255 struct dsa_switch *ds = p->dp->ds;
256 int port = p->dp->index;
258 /* Pass through to switch driver if it supports timestamping */
261 if (ds->ops->port_hwtstamp_get)
262 return ds->ops->port_hwtstamp_get(ds, port, ifr);
265 if (ds->ops->port_hwtstamp_set)
266 return ds->ops->port_hwtstamp_set(ds, port, ifr);
270 return phylink_mii_ioctl(p->dp->pl, ifr, cmd);
273 static int dsa_slave_port_attr_set(struct net_device *dev,
274 const struct switchdev_attr *attr)
276 struct dsa_port *dp = dsa_slave_to_port(dev);
279 if (!dsa_port_offloads_netdev(dp, attr->orig_dev))
283 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
284 ret = dsa_port_set_state(dp, attr->u.stp_state);
286 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
287 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering);
289 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
290 ret = dsa_port_ageing_time(dp, attr->u.ageing_time);
292 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
293 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags);
295 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
296 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags);
298 case SWITCHDEV_ATTR_ID_BRIDGE_MROUTER:
299 ret = dsa_port_mrouter(dp->cpu_dp, attr->u.mrouter);
309 /* Must be called under rcu_read_lock() */
311 dsa_slave_vlan_check_for_8021q_uppers(struct net_device *slave,
312 const struct switchdev_obj_port_vlan *vlan)
314 struct net_device *upper_dev;
315 struct list_head *iter;
317 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) {
320 if (!is_vlan_dev(upper_dev))
323 vid = vlan_dev_vlan_id(upper_dev);
324 if (vid == vlan->vid)
331 static int dsa_slave_vlan_add(struct net_device *dev,
332 const struct switchdev_obj *obj,
333 struct netlink_ext_ack *extack)
335 struct net_device *master = dsa_slave_to_master(dev);
336 struct dsa_port *dp = dsa_slave_to_port(dev);
337 struct switchdev_obj_port_vlan vlan;
340 if (!dsa_port_offloads_netdev(dp, obj->orig_dev))
343 if (dsa_port_skip_vlan_configuration(dp)) {
344 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN");
348 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj);
350 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with
353 if (br_vlan_enabled(dp->bridge_dev)) {
355 err = dsa_slave_vlan_check_for_8021q_uppers(dev, &vlan);
361 err = dsa_port_vlan_add(dp, &vlan);
365 /* We need the dedicated CPU port to be a member of the VLAN as well.
366 * Even though drivers often handle CPU membership in special ways,
367 * it doesn't make sense to program a PVID, so clear this flag.
369 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID;
371 err = dsa_port_vlan_add(dp->cpu_dp, &vlan);
375 return vlan_vid_add(master, htons(ETH_P_8021Q), vlan.vid);
378 static int dsa_slave_port_obj_add(struct net_device *dev,
379 const struct switchdev_obj *obj,
380 struct netlink_ext_ack *extack)
382 struct dsa_port *dp = dsa_slave_to_port(dev);
386 case SWITCHDEV_OBJ_ID_PORT_MDB:
387 if (!dsa_port_offloads_netdev(dp, obj->orig_dev))
389 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
391 case SWITCHDEV_OBJ_ID_HOST_MDB:
392 /* DSA can directly translate this to a normal MDB add,
393 * but on the CPU port.
395 err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj));
397 case SWITCHDEV_OBJ_ID_PORT_VLAN:
398 err = dsa_slave_vlan_add(dev, obj, extack);
408 static int dsa_slave_vlan_del(struct net_device *dev,
409 const struct switchdev_obj *obj)
411 struct net_device *master = dsa_slave_to_master(dev);
412 struct dsa_port *dp = dsa_slave_to_port(dev);
413 struct switchdev_obj_port_vlan *vlan;
416 if (!dsa_port_offloads_netdev(dp, obj->orig_dev))
419 if (dsa_port_skip_vlan_configuration(dp))
422 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
424 /* Do not deprogram the CPU port as it may be shared with other user
425 * ports which can be members of this VLAN as well.
427 err = dsa_port_vlan_del(dp, vlan);
431 vlan_vid_del(master, htons(ETH_P_8021Q), vlan->vid);
436 static int dsa_slave_port_obj_del(struct net_device *dev,
437 const struct switchdev_obj *obj)
439 struct dsa_port *dp = dsa_slave_to_port(dev);
443 case SWITCHDEV_OBJ_ID_PORT_MDB:
444 if (!dsa_port_offloads_netdev(dp, obj->orig_dev))
446 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
448 case SWITCHDEV_OBJ_ID_HOST_MDB:
449 /* DSA can directly translate this to a normal MDB add,
450 * but on the CPU port.
452 err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj));
454 case SWITCHDEV_OBJ_ID_PORT_VLAN:
455 err = dsa_slave_vlan_del(dev, obj);
465 static int dsa_slave_get_port_parent_id(struct net_device *dev,
466 struct netdev_phys_item_id *ppid)
468 struct dsa_port *dp = dsa_slave_to_port(dev);
469 struct dsa_switch *ds = dp->ds;
470 struct dsa_switch_tree *dst = ds->dst;
472 /* For non-legacy ports, devlink is used and it takes
473 * care of the name generation. This ndo implementation
474 * should be removed with legacy support.
479 ppid->id_len = sizeof(dst->index);
480 memcpy(&ppid->id, &dst->index, ppid->id_len);
485 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
488 #ifdef CONFIG_NET_POLL_CONTROLLER
489 struct dsa_slave_priv *p = netdev_priv(dev);
491 return netpoll_send_skb(p->netpoll, skb);
498 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
501 struct dsa_switch *ds = p->dp->ds;
502 struct sk_buff *clone;
505 type = ptp_classify_raw(skb);
506 if (type == PTP_CLASS_NONE)
509 if (!ds->ops->port_txtstamp)
512 clone = skb_clone_sk(skb);
516 if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type)) {
517 DSA_SKB_CB(skb)->clone = clone;
524 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
526 /* SKB for netpoll still need to be mangled with the protocol-specific
527 * tag to be successfully transmitted
529 if (unlikely(netpoll_tx_running(dev)))
530 return dsa_slave_netpoll_send_skb(dev, skb);
532 /* Queue the SKB for transmission on the parent interface, but
533 * do not modify its EtherType
535 skb->dev = dsa_slave_to_master(dev);
540 EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
542 static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev)
544 int needed_headroom = dev->needed_headroom;
545 int needed_tailroom = dev->needed_tailroom;
547 /* For tail taggers, we need to pad short frames ourselves, to ensure
548 * that the tail tag does not fail at its role of being at the end of
549 * the packet, once the master interface pads the frame. Account for
550 * that pad length here, and pad later.
552 if (unlikely(needed_tailroom && skb->len < ETH_ZLEN))
553 needed_tailroom += ETH_ZLEN - skb->len;
554 /* skb_headroom() returns unsigned int... */
555 needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0);
556 needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0);
558 if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb)))
559 /* No reallocation needed, yay! */
562 return pskb_expand_head(skb, needed_headroom, needed_tailroom,
566 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
568 struct dsa_slave_priv *p = netdev_priv(dev);
569 struct sk_buff *nskb;
571 dev_sw_netstats_tx_add(dev, 1, skb->len);
573 DSA_SKB_CB(skb)->clone = NULL;
575 /* Identify PTP protocol packets, clone them, and pass them to the
578 dsa_skb_tx_timestamp(p, skb);
580 if (dsa_realloc_skb(skb, dev)) {
581 dev_kfree_skb_any(skb);
585 /* needed_tailroom should still be 'warm' in the cache line from
586 * dsa_realloc_skb(), which has also ensured that padding is safe.
588 if (dev->needed_tailroom)
591 /* Transmit function may have to reallocate the original SKB,
592 * in which case it must have freed it. Only free it here on error.
594 nskb = p->xmit(skb, dev);
600 return dsa_enqueue_skb(nskb, dev);
603 /* ethtool operations *******************************************************/
605 static void dsa_slave_get_drvinfo(struct net_device *dev,
606 struct ethtool_drvinfo *drvinfo)
608 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
609 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
610 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
613 static int dsa_slave_get_regs_len(struct net_device *dev)
615 struct dsa_port *dp = dsa_slave_to_port(dev);
616 struct dsa_switch *ds = dp->ds;
618 if (ds->ops->get_regs_len)
619 return ds->ops->get_regs_len(ds, dp->index);
625 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
627 struct dsa_port *dp = dsa_slave_to_port(dev);
628 struct dsa_switch *ds = dp->ds;
630 if (ds->ops->get_regs)
631 ds->ops->get_regs(ds, dp->index, regs, _p);
634 static int dsa_slave_nway_reset(struct net_device *dev)
636 struct dsa_port *dp = dsa_slave_to_port(dev);
638 return phylink_ethtool_nway_reset(dp->pl);
641 static int dsa_slave_get_eeprom_len(struct net_device *dev)
643 struct dsa_port *dp = dsa_slave_to_port(dev);
644 struct dsa_switch *ds = dp->ds;
646 if (ds->cd && ds->cd->eeprom_len)
647 return ds->cd->eeprom_len;
649 if (ds->ops->get_eeprom_len)
650 return ds->ops->get_eeprom_len(ds);
655 static int dsa_slave_get_eeprom(struct net_device *dev,
656 struct ethtool_eeprom *eeprom, u8 *data)
658 struct dsa_port *dp = dsa_slave_to_port(dev);
659 struct dsa_switch *ds = dp->ds;
661 if (ds->ops->get_eeprom)
662 return ds->ops->get_eeprom(ds, eeprom, data);
667 static int dsa_slave_set_eeprom(struct net_device *dev,
668 struct ethtool_eeprom *eeprom, u8 *data)
670 struct dsa_port *dp = dsa_slave_to_port(dev);
671 struct dsa_switch *ds = dp->ds;
673 if (ds->ops->set_eeprom)
674 return ds->ops->set_eeprom(ds, eeprom, data);
679 static void dsa_slave_get_strings(struct net_device *dev,
680 uint32_t stringset, uint8_t *data)
682 struct dsa_port *dp = dsa_slave_to_port(dev);
683 struct dsa_switch *ds = dp->ds;
685 if (stringset == ETH_SS_STATS) {
686 int len = ETH_GSTRING_LEN;
688 strncpy(data, "tx_packets", len);
689 strncpy(data + len, "tx_bytes", len);
690 strncpy(data + 2 * len, "rx_packets", len);
691 strncpy(data + 3 * len, "rx_bytes", len);
692 if (ds->ops->get_strings)
693 ds->ops->get_strings(ds, dp->index, stringset,
698 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
699 struct ethtool_stats *stats,
702 struct dsa_port *dp = dsa_slave_to_port(dev);
703 struct dsa_switch *ds = dp->ds;
704 struct pcpu_sw_netstats *s;
708 for_each_possible_cpu(i) {
709 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
711 s = per_cpu_ptr(dev->tstats, i);
713 start = u64_stats_fetch_begin_irq(&s->syncp);
714 tx_packets = s->tx_packets;
715 tx_bytes = s->tx_bytes;
716 rx_packets = s->rx_packets;
717 rx_bytes = s->rx_bytes;
718 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
719 data[0] += tx_packets;
721 data[2] += rx_packets;
724 if (ds->ops->get_ethtool_stats)
725 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
728 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
730 struct dsa_port *dp = dsa_slave_to_port(dev);
731 struct dsa_switch *ds = dp->ds;
733 if (sset == ETH_SS_STATS) {
737 if (ds->ops->get_sset_count)
738 count += ds->ops->get_sset_count(ds, dp->index, sset);
746 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
748 struct dsa_port *dp = dsa_slave_to_port(dev);
749 struct dsa_switch *ds = dp->ds;
751 phylink_ethtool_get_wol(dp->pl, w);
753 if (ds->ops->get_wol)
754 ds->ops->get_wol(ds, dp->index, w);
757 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
759 struct dsa_port *dp = dsa_slave_to_port(dev);
760 struct dsa_switch *ds = dp->ds;
761 int ret = -EOPNOTSUPP;
763 phylink_ethtool_set_wol(dp->pl, w);
765 if (ds->ops->set_wol)
766 ret = ds->ops->set_wol(ds, dp->index, w);
771 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
773 struct dsa_port *dp = dsa_slave_to_port(dev);
774 struct dsa_switch *ds = dp->ds;
777 /* Port's PHY and MAC both need to be EEE capable */
778 if (!dev->phydev || !dp->pl)
781 if (!ds->ops->set_mac_eee)
784 ret = ds->ops->set_mac_eee(ds, dp->index, e);
788 return phylink_ethtool_set_eee(dp->pl, e);
791 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
793 struct dsa_port *dp = dsa_slave_to_port(dev);
794 struct dsa_switch *ds = dp->ds;
797 /* Port's PHY and MAC both need to be EEE capable */
798 if (!dev->phydev || !dp->pl)
801 if (!ds->ops->get_mac_eee)
804 ret = ds->ops->get_mac_eee(ds, dp->index, e);
808 return phylink_ethtool_get_eee(dp->pl, e);
811 static int dsa_slave_get_link_ksettings(struct net_device *dev,
812 struct ethtool_link_ksettings *cmd)
814 struct dsa_port *dp = dsa_slave_to_port(dev);
816 return phylink_ethtool_ksettings_get(dp->pl, cmd);
819 static int dsa_slave_set_link_ksettings(struct net_device *dev,
820 const struct ethtool_link_ksettings *cmd)
822 struct dsa_port *dp = dsa_slave_to_port(dev);
824 return phylink_ethtool_ksettings_set(dp->pl, cmd);
827 static void dsa_slave_get_pauseparam(struct net_device *dev,
828 struct ethtool_pauseparam *pause)
830 struct dsa_port *dp = dsa_slave_to_port(dev);
832 phylink_ethtool_get_pauseparam(dp->pl, pause);
835 static int dsa_slave_set_pauseparam(struct net_device *dev,
836 struct ethtool_pauseparam *pause)
838 struct dsa_port *dp = dsa_slave_to_port(dev);
840 return phylink_ethtool_set_pauseparam(dp->pl, pause);
843 #ifdef CONFIG_NET_POLL_CONTROLLER
844 static int dsa_slave_netpoll_setup(struct net_device *dev,
845 struct netpoll_info *ni)
847 struct net_device *master = dsa_slave_to_master(dev);
848 struct dsa_slave_priv *p = netdev_priv(dev);
849 struct netpoll *netpoll;
852 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
856 err = __netpoll_setup(netpoll, master);
862 p->netpoll = netpoll;
867 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
869 struct dsa_slave_priv *p = netdev_priv(dev);
870 struct netpoll *netpoll = p->netpoll;
877 __netpoll_free(netpoll);
880 static void dsa_slave_poll_controller(struct net_device *dev)
885 static int dsa_slave_get_phys_port_name(struct net_device *dev,
886 char *name, size_t len)
888 struct dsa_port *dp = dsa_slave_to_port(dev);
890 /* For non-legacy ports, devlink is used and it takes
891 * care of the name generation. This ndo implementation
892 * should be removed with legacy support.
897 if (snprintf(name, len, "p%d", dp->index) >= len)
903 static struct dsa_mall_tc_entry *
904 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
906 struct dsa_slave_priv *p = netdev_priv(dev);
907 struct dsa_mall_tc_entry *mall_tc_entry;
909 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
910 if (mall_tc_entry->cookie == cookie)
911 return mall_tc_entry;
917 dsa_slave_add_cls_matchall_mirred(struct net_device *dev,
918 struct tc_cls_matchall_offload *cls,
921 struct dsa_port *dp = dsa_slave_to_port(dev);
922 struct dsa_slave_priv *p = netdev_priv(dev);
923 struct dsa_mall_mirror_tc_entry *mirror;
924 struct dsa_mall_tc_entry *mall_tc_entry;
925 struct dsa_switch *ds = dp->ds;
926 struct flow_action_entry *act;
927 struct dsa_port *to_dp;
930 if (!ds->ops->port_mirror_add)
933 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
937 act = &cls->rule->action.entries[0];
942 if (!dsa_slave_dev_check(act->dev))
945 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
949 mall_tc_entry->cookie = cls->cookie;
950 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
951 mirror = &mall_tc_entry->mirror;
953 to_dp = dsa_slave_to_port(act->dev);
955 mirror->to_local_port = to_dp->index;
956 mirror->ingress = ingress;
958 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
960 kfree(mall_tc_entry);
964 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
970 dsa_slave_add_cls_matchall_police(struct net_device *dev,
971 struct tc_cls_matchall_offload *cls,
974 struct netlink_ext_ack *extack = cls->common.extack;
975 struct dsa_port *dp = dsa_slave_to_port(dev);
976 struct dsa_slave_priv *p = netdev_priv(dev);
977 struct dsa_mall_policer_tc_entry *policer;
978 struct dsa_mall_tc_entry *mall_tc_entry;
979 struct dsa_switch *ds = dp->ds;
980 struct flow_action_entry *act;
983 if (!ds->ops->port_policer_add) {
984 NL_SET_ERR_MSG_MOD(extack,
985 "Policing offload not implemented");
990 NL_SET_ERR_MSG_MOD(extack,
991 "Only supported on ingress qdisc");
995 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
999 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) {
1000 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) {
1001 NL_SET_ERR_MSG_MOD(extack,
1002 "Only one port policer allowed");
1007 act = &cls->rule->action.entries[0];
1009 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1013 mall_tc_entry->cookie = cls->cookie;
1014 mall_tc_entry->type = DSA_PORT_MALL_POLICER;
1015 policer = &mall_tc_entry->policer;
1016 policer->rate_bytes_per_sec = act->police.rate_bytes_ps;
1017 policer->burst = act->police.burst;
1019 err = ds->ops->port_policer_add(ds, dp->index, policer);
1021 kfree(mall_tc_entry);
1025 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
1030 static int dsa_slave_add_cls_matchall(struct net_device *dev,
1031 struct tc_cls_matchall_offload *cls,
1034 int err = -EOPNOTSUPP;
1036 if (cls->common.protocol == htons(ETH_P_ALL) &&
1037 flow_offload_has_one_action(&cls->rule->action) &&
1038 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED)
1039 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress);
1040 else if (flow_offload_has_one_action(&cls->rule->action) &&
1041 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE)
1042 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress);
1047 static void dsa_slave_del_cls_matchall(struct net_device *dev,
1048 struct tc_cls_matchall_offload *cls)
1050 struct dsa_port *dp = dsa_slave_to_port(dev);
1051 struct dsa_mall_tc_entry *mall_tc_entry;
1052 struct dsa_switch *ds = dp->ds;
1054 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
1058 list_del(&mall_tc_entry->list);
1060 switch (mall_tc_entry->type) {
1061 case DSA_PORT_MALL_MIRROR:
1062 if (ds->ops->port_mirror_del)
1063 ds->ops->port_mirror_del(ds, dp->index,
1064 &mall_tc_entry->mirror);
1066 case DSA_PORT_MALL_POLICER:
1067 if (ds->ops->port_policer_del)
1068 ds->ops->port_policer_del(ds, dp->index);
1074 kfree(mall_tc_entry);
1077 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
1078 struct tc_cls_matchall_offload *cls,
1081 if (cls->common.chain_index)
1084 switch (cls->command) {
1085 case TC_CLSMATCHALL_REPLACE:
1086 return dsa_slave_add_cls_matchall(dev, cls, ingress);
1087 case TC_CLSMATCHALL_DESTROY:
1088 dsa_slave_del_cls_matchall(dev, cls);
1095 static int dsa_slave_add_cls_flower(struct net_device *dev,
1096 struct flow_cls_offload *cls,
1099 struct dsa_port *dp = dsa_slave_to_port(dev);
1100 struct dsa_switch *ds = dp->ds;
1101 int port = dp->index;
1103 if (!ds->ops->cls_flower_add)
1106 return ds->ops->cls_flower_add(ds, port, cls, ingress);
1109 static int dsa_slave_del_cls_flower(struct net_device *dev,
1110 struct flow_cls_offload *cls,
1113 struct dsa_port *dp = dsa_slave_to_port(dev);
1114 struct dsa_switch *ds = dp->ds;
1115 int port = dp->index;
1117 if (!ds->ops->cls_flower_del)
1120 return ds->ops->cls_flower_del(ds, port, cls, ingress);
1123 static int dsa_slave_stats_cls_flower(struct net_device *dev,
1124 struct flow_cls_offload *cls,
1127 struct dsa_port *dp = dsa_slave_to_port(dev);
1128 struct dsa_switch *ds = dp->ds;
1129 int port = dp->index;
1131 if (!ds->ops->cls_flower_stats)
1134 return ds->ops->cls_flower_stats(ds, port, cls, ingress);
1137 static int dsa_slave_setup_tc_cls_flower(struct net_device *dev,
1138 struct flow_cls_offload *cls,
1141 switch (cls->command) {
1142 case FLOW_CLS_REPLACE:
1143 return dsa_slave_add_cls_flower(dev, cls, ingress);
1144 case FLOW_CLS_DESTROY:
1145 return dsa_slave_del_cls_flower(dev, cls, ingress);
1146 case FLOW_CLS_STATS:
1147 return dsa_slave_stats_cls_flower(dev, cls, ingress);
1153 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
1154 void *cb_priv, bool ingress)
1156 struct net_device *dev = cb_priv;
1158 if (!tc_can_offload(dev))
1162 case TC_SETUP_CLSMATCHALL:
1163 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
1164 case TC_SETUP_CLSFLOWER:
1165 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress);
1171 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
1172 void *type_data, void *cb_priv)
1174 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
1177 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
1178 void *type_data, void *cb_priv)
1180 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
1183 static LIST_HEAD(dsa_slave_block_cb_list);
1185 static int dsa_slave_setup_tc_block(struct net_device *dev,
1186 struct flow_block_offload *f)
1188 struct flow_block_cb *block_cb;
1189 flow_setup_cb_t *cb;
1191 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
1192 cb = dsa_slave_setup_tc_block_cb_ig;
1193 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
1194 cb = dsa_slave_setup_tc_block_cb_eg;
1198 f->driver_block_list = &dsa_slave_block_cb_list;
1200 switch (f->command) {
1201 case FLOW_BLOCK_BIND:
1202 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list))
1205 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL);
1206 if (IS_ERR(block_cb))
1207 return PTR_ERR(block_cb);
1209 flow_block_cb_add(block_cb, f);
1210 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list);
1212 case FLOW_BLOCK_UNBIND:
1213 block_cb = flow_block_cb_lookup(f->block, cb, dev);
1217 flow_block_cb_remove(block_cb, f);
1218 list_del(&block_cb->driver_list);
1225 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
1228 struct dsa_port *dp = dsa_slave_to_port(dev);
1229 struct dsa_switch *ds = dp->ds;
1231 if (type == TC_SETUP_BLOCK)
1232 return dsa_slave_setup_tc_block(dev, type_data);
1234 if (!ds->ops->port_setup_tc)
1237 return ds->ops->port_setup_tc(ds, dp->index, type, type_data);
1240 static int dsa_slave_get_rxnfc(struct net_device *dev,
1241 struct ethtool_rxnfc *nfc, u32 *rule_locs)
1243 struct dsa_port *dp = dsa_slave_to_port(dev);
1244 struct dsa_switch *ds = dp->ds;
1246 if (!ds->ops->get_rxnfc)
1249 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
1252 static int dsa_slave_set_rxnfc(struct net_device *dev,
1253 struct ethtool_rxnfc *nfc)
1255 struct dsa_port *dp = dsa_slave_to_port(dev);
1256 struct dsa_switch *ds = dp->ds;
1258 if (!ds->ops->set_rxnfc)
1261 return ds->ops->set_rxnfc(ds, dp->index, nfc);
1264 static int dsa_slave_get_ts_info(struct net_device *dev,
1265 struct ethtool_ts_info *ts)
1267 struct dsa_slave_priv *p = netdev_priv(dev);
1268 struct dsa_switch *ds = p->dp->ds;
1270 if (!ds->ops->get_ts_info)
1273 return ds->ops->get_ts_info(ds, p->dp->index, ts);
1276 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
1279 struct net_device *master = dsa_slave_to_master(dev);
1280 struct dsa_port *dp = dsa_slave_to_port(dev);
1281 struct switchdev_obj_port_vlan vlan = {
1282 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
1284 /* This API only allows programming tagged, non-PVID VIDs */
1290 ret = dsa_port_vlan_add(dp, &vlan);
1294 /* And CPU port... */
1295 ret = dsa_port_vlan_add(dp->cpu_dp, &vlan);
1299 return vlan_vid_add(master, proto, vid);
1302 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
1305 struct net_device *master = dsa_slave_to_master(dev);
1306 struct dsa_port *dp = dsa_slave_to_port(dev);
1307 struct switchdev_obj_port_vlan vlan = {
1309 /* This API only allows programming tagged, non-PVID VIDs */
1314 /* Do not deprogram the CPU port as it may be shared with other user
1315 * ports which can be members of this VLAN as well.
1317 err = dsa_port_vlan_del(dp, &vlan);
1321 vlan_vid_del(master, proto, vid);
1326 struct dsa_hw_port {
1327 struct list_head list;
1328 struct net_device *dev;
1332 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu)
1334 const struct dsa_hw_port *p;
1337 list_for_each_entry(p, hw_port_list, list) {
1338 if (p->dev->mtu == mtu)
1341 err = dev_set_mtu(p->dev, mtu);
1349 list_for_each_entry_continue_reverse(p, hw_port_list, list) {
1350 if (p->dev->mtu == p->old_mtu)
1353 if (dev_set_mtu(p->dev, p->old_mtu))
1354 netdev_err(p->dev, "Failed to restore MTU\n");
1360 static void dsa_hw_port_list_free(struct list_head *hw_port_list)
1362 struct dsa_hw_port *p, *n;
1364 list_for_each_entry_safe(p, n, hw_port_list, list)
1368 /* Make the hardware datapath to/from @dev limited to a common MTU */
1369 static void dsa_bridge_mtu_normalization(struct dsa_port *dp)
1371 struct list_head hw_port_list;
1372 struct dsa_switch_tree *dst;
1373 int min_mtu = ETH_MAX_MTU;
1374 struct dsa_port *other_dp;
1377 if (!dp->ds->mtu_enforcement_ingress)
1380 if (!dp->bridge_dev)
1383 INIT_LIST_HEAD(&hw_port_list);
1385 /* Populate the list of ports that are part of the same bridge
1386 * as the newly added/modified port
1388 list_for_each_entry(dst, &dsa_tree_list, list) {
1389 list_for_each_entry(other_dp, &dst->ports, list) {
1390 struct dsa_hw_port *hw_port;
1391 struct net_device *slave;
1393 if (other_dp->type != DSA_PORT_TYPE_USER)
1396 if (other_dp->bridge_dev != dp->bridge_dev)
1399 if (!other_dp->ds->mtu_enforcement_ingress)
1402 slave = other_dp->slave;
1404 if (min_mtu > slave->mtu)
1405 min_mtu = slave->mtu;
1407 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL);
1411 hw_port->dev = slave;
1412 hw_port->old_mtu = slave->mtu;
1414 list_add(&hw_port->list, &hw_port_list);
1418 /* Attempt to configure the entire hardware bridge to the newly added
1419 * interface's MTU first, regardless of whether the intention of the
1420 * user was to raise or lower it.
1422 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu);
1426 /* Clearly that didn't work out so well, so just set the minimum MTU on
1427 * all hardware bridge ports now. If this fails too, then all ports will
1428 * still have their old MTU rolled back anyway.
1430 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu);
1433 dsa_hw_port_list_free(&hw_port_list);
1436 int dsa_slave_change_mtu(struct net_device *dev, int new_mtu)
1438 struct net_device *master = dsa_slave_to_master(dev);
1439 struct dsa_port *dp = dsa_slave_to_port(dev);
1440 struct dsa_slave_priv *p = netdev_priv(dev);
1441 struct dsa_switch *ds = p->dp->ds;
1442 struct dsa_port *cpu_dp;
1443 int port = p->dp->index;
1444 int largest_mtu = 0;
1451 if (!ds->ops->port_change_mtu)
1454 for (i = 0; i < ds->num_ports; i++) {
1457 if (!dsa_is_user_port(ds, i))
1460 /* During probe, this function will be called for each slave
1461 * device, while not all of them have been allocated. That's
1462 * ok, it doesn't change what the maximum is, so ignore it.
1464 if (!dsa_to_port(ds, i)->slave)
1467 /* Pretend that we already applied the setting, which we
1468 * actually haven't (still haven't done all integrity checks)
1471 slave_mtu = new_mtu;
1473 slave_mtu = dsa_to_port(ds, i)->slave->mtu;
1475 if (largest_mtu < slave_mtu)
1476 largest_mtu = slave_mtu;
1479 cpu_dp = dsa_to_port(ds, port)->cpu_dp;
1481 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu);
1482 old_master_mtu = master->mtu;
1483 new_master_mtu = largest_mtu + cpu_dp->tag_ops->overhead;
1484 if (new_master_mtu > mtu_limit)
1487 /* If the master MTU isn't over limit, there's no need to check the CPU
1488 * MTU, since that surely isn't either.
1490 cpu_mtu = largest_mtu;
1492 /* Start applying stuff */
1493 if (new_master_mtu != old_master_mtu) {
1494 err = dev_set_mtu(master, new_master_mtu);
1496 goto out_master_failed;
1498 /* We only need to propagate the MTU of the CPU port to
1499 * upstream switches.
1501 err = dsa_port_mtu_change(cpu_dp, cpu_mtu, true);
1503 goto out_cpu_failed;
1506 err = dsa_port_mtu_change(dp, new_mtu, false);
1508 goto out_port_failed;
1512 dsa_bridge_mtu_normalization(dp);
1517 if (new_master_mtu != old_master_mtu)
1518 dsa_port_mtu_change(cpu_dp, old_master_mtu -
1519 cpu_dp->tag_ops->overhead,
1522 if (new_master_mtu != old_master_mtu)
1523 dev_set_mtu(master, old_master_mtu);
1528 static const struct ethtool_ops dsa_slave_ethtool_ops = {
1529 .get_drvinfo = dsa_slave_get_drvinfo,
1530 .get_regs_len = dsa_slave_get_regs_len,
1531 .get_regs = dsa_slave_get_regs,
1532 .nway_reset = dsa_slave_nway_reset,
1533 .get_link = ethtool_op_get_link,
1534 .get_eeprom_len = dsa_slave_get_eeprom_len,
1535 .get_eeprom = dsa_slave_get_eeprom,
1536 .set_eeprom = dsa_slave_set_eeprom,
1537 .get_strings = dsa_slave_get_strings,
1538 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
1539 .get_sset_count = dsa_slave_get_sset_count,
1540 .set_wol = dsa_slave_set_wol,
1541 .get_wol = dsa_slave_get_wol,
1542 .set_eee = dsa_slave_set_eee,
1543 .get_eee = dsa_slave_get_eee,
1544 .get_link_ksettings = dsa_slave_get_link_ksettings,
1545 .set_link_ksettings = dsa_slave_set_link_ksettings,
1546 .get_pauseparam = dsa_slave_get_pauseparam,
1547 .set_pauseparam = dsa_slave_set_pauseparam,
1548 .get_rxnfc = dsa_slave_get_rxnfc,
1549 .set_rxnfc = dsa_slave_set_rxnfc,
1550 .get_ts_info = dsa_slave_get_ts_info,
1553 /* legacy way, bypassing the bridge *****************************************/
1554 static int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
1555 struct net_device *dev,
1556 const unsigned char *addr, u16 vid,
1558 struct netlink_ext_ack *extack)
1560 struct dsa_port *dp = dsa_slave_to_port(dev);
1562 return dsa_port_fdb_add(dp, addr, vid);
1565 static int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
1566 struct net_device *dev,
1567 const unsigned char *addr, u16 vid)
1569 struct dsa_port *dp = dsa_slave_to_port(dev);
1571 return dsa_port_fdb_del(dp, addr, vid);
1574 static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
1576 struct dsa_port *dp = dsa_slave_to_port(dev);
1578 return dp->ds->devlink ? &dp->devlink_port : NULL;
1581 static void dsa_slave_get_stats64(struct net_device *dev,
1582 struct rtnl_link_stats64 *s)
1584 struct dsa_port *dp = dsa_slave_to_port(dev);
1585 struct dsa_switch *ds = dp->ds;
1587 if (ds->ops->get_stats64)
1588 ds->ops->get_stats64(ds, dp->index, s);
1590 dev_get_tstats64(dev, s);
1593 static const struct net_device_ops dsa_slave_netdev_ops = {
1594 .ndo_open = dsa_slave_open,
1595 .ndo_stop = dsa_slave_close,
1596 .ndo_start_xmit = dsa_slave_xmit,
1597 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
1598 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
1599 .ndo_set_mac_address = dsa_slave_set_mac_address,
1600 .ndo_fdb_add = dsa_legacy_fdb_add,
1601 .ndo_fdb_del = dsa_legacy_fdb_del,
1602 .ndo_fdb_dump = dsa_slave_fdb_dump,
1603 .ndo_do_ioctl = dsa_slave_ioctl,
1604 .ndo_get_iflink = dsa_slave_get_iflink,
1605 #ifdef CONFIG_NET_POLL_CONTROLLER
1606 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
1607 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
1608 .ndo_poll_controller = dsa_slave_poll_controller,
1610 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
1611 .ndo_setup_tc = dsa_slave_setup_tc,
1612 .ndo_get_stats64 = dsa_slave_get_stats64,
1613 .ndo_get_port_parent_id = dsa_slave_get_port_parent_id,
1614 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
1615 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
1616 .ndo_get_devlink_port = dsa_slave_get_devlink_port,
1617 .ndo_change_mtu = dsa_slave_change_mtu,
1620 static struct device_type dsa_type = {
1624 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
1626 const struct dsa_port *dp = dsa_to_port(ds, port);
1629 phylink_mac_change(dp->pl, up);
1631 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
1633 static void dsa_slave_phylink_fixed_state(struct phylink_config *config,
1634 struct phylink_link_state *state)
1636 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1637 struct dsa_switch *ds = dp->ds;
1639 /* No need to check that this operation is valid, the callback would
1640 * not be called if it was not.
1642 ds->ops->phylink_fixed_state(ds, dp->index, state);
1645 /* slave device setup *******************************************************/
1646 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
1648 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1649 struct dsa_switch *ds = dp->ds;
1651 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
1652 if (!slave_dev->phydev) {
1653 netdev_err(slave_dev, "no phy at %d\n", addr);
1657 return phylink_connect_phy(dp->pl, slave_dev->phydev);
1660 static int dsa_slave_phy_setup(struct net_device *slave_dev)
1662 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1663 struct device_node *port_dn = dp->dn;
1664 struct dsa_switch *ds = dp->ds;
1665 phy_interface_t mode;
1669 ret = of_get_phy_mode(port_dn, &mode);
1671 mode = PHY_INTERFACE_MODE_NA;
1673 dp->pl_config.dev = &slave_dev->dev;
1674 dp->pl_config.type = PHYLINK_NETDEV;
1676 /* The get_fixed_state callback takes precedence over polling the
1677 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set
1678 * this if the switch provides such a callback.
1680 if (ds->ops->phylink_fixed_state) {
1681 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state;
1682 dp->pl_config.poll_fixed_state = true;
1685 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode,
1686 &dsa_port_phylink_mac_ops);
1687 if (IS_ERR(dp->pl)) {
1688 netdev_err(slave_dev,
1689 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1690 return PTR_ERR(dp->pl);
1693 if (ds->ops->get_phy_flags)
1694 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
1696 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
1697 if (ret == -ENODEV && ds->slave_mii_bus) {
1698 /* We could not connect to a designated PHY or SFP, so try to
1699 * use the switch internal MDIO bus instead
1701 ret = dsa_slave_phy_connect(slave_dev, dp->index);
1703 netdev_err(slave_dev,
1704 "failed to connect to port %d: %d\n",
1706 phylink_destroy(dp->pl);
1714 void dsa_slave_setup_tagger(struct net_device *slave)
1716 struct dsa_port *dp = dsa_slave_to_port(slave);
1717 struct dsa_slave_priv *p = netdev_priv(slave);
1718 const struct dsa_port *cpu_dp = dp->cpu_dp;
1719 struct net_device *master = cpu_dp->master;
1721 if (cpu_dp->tag_ops->tail_tag)
1722 slave->needed_tailroom = cpu_dp->tag_ops->overhead;
1724 slave->needed_headroom = cpu_dp->tag_ops->overhead;
1725 /* Try to save one extra realloc later in the TX path (in the master)
1726 * by also inheriting the master's needed headroom and tailroom.
1727 * The 8021q driver also does this.
1729 slave->needed_headroom += master->needed_headroom;
1730 slave->needed_tailroom += master->needed_tailroom;
1732 p->xmit = cpu_dp->tag_ops->xmit;
1735 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1736 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1737 struct netdev_queue *txq,
1740 lockdep_set_class(&txq->_xmit_lock,
1741 &dsa_slave_netdev_xmit_lock_key);
1744 int dsa_slave_suspend(struct net_device *slave_dev)
1746 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1748 if (!netif_running(slave_dev))
1751 netif_device_detach(slave_dev);
1754 phylink_stop(dp->pl);
1760 int dsa_slave_resume(struct net_device *slave_dev)
1762 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1764 if (!netif_running(slave_dev))
1767 netif_device_attach(slave_dev);
1770 phylink_start(dp->pl);
1776 int dsa_slave_create(struct dsa_port *port)
1778 const struct dsa_port *cpu_dp = port->cpu_dp;
1779 struct net_device *master = cpu_dp->master;
1780 struct dsa_switch *ds = port->ds;
1781 const char *name = port->name;
1782 struct net_device *slave_dev;
1783 struct dsa_slave_priv *p;
1786 if (!ds->num_tx_queues)
1787 ds->num_tx_queues = 1;
1789 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
1790 NET_NAME_UNKNOWN, ether_setup,
1791 ds->num_tx_queues, 1);
1792 if (slave_dev == NULL)
1795 slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
1796 if (ds->ops->port_vlan_add && ds->ops->port_vlan_del)
1797 slave_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1798 slave_dev->hw_features |= NETIF_F_HW_TC;
1799 slave_dev->features |= NETIF_F_LLTX;
1800 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1801 if (!IS_ERR_OR_NULL(port->mac))
1802 ether_addr_copy(slave_dev->dev_addr, port->mac);
1804 eth_hw_addr_inherit(slave_dev, master);
1805 slave_dev->priv_flags |= IFF_NO_QUEUE;
1806 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1807 if (ds->ops->port_max_mtu)
1808 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index);
1809 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1811 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1814 SET_NETDEV_DEV(slave_dev, port->ds->dev);
1815 slave_dev->dev.of_node = port->dn;
1816 slave_dev->vlan_features = master->vlan_features;
1818 p = netdev_priv(slave_dev);
1819 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1820 if (!slave_dev->tstats) {
1821 free_netdev(slave_dev);
1825 ret = gro_cells_init(&p->gcells, slave_dev);
1830 INIT_LIST_HEAD(&p->mall_tc_list);
1831 port->slave = slave_dev;
1832 dsa_slave_setup_tagger(slave_dev);
1835 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN);
1837 if (ret && ret != -EOPNOTSUPP)
1838 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n",
1839 ret, ETH_DATA_LEN, port->index);
1841 netif_carrier_off(slave_dev);
1843 ret = dsa_slave_phy_setup(slave_dev);
1845 netdev_err(slave_dev,
1846 "error %d setting up PHY for tree %d, switch %d, port %d\n",
1847 ret, ds->dst->index, ds->index, port->index);
1853 ret = register_netdevice(slave_dev);
1855 netdev_err(master, "error %d registering interface %s\n",
1856 ret, slave_dev->name);
1861 ret = netdev_upper_dev_link(master, slave_dev, NULL);
1866 goto out_unregister;
1871 unregister_netdev(slave_dev);
1874 phylink_disconnect_phy(p->dp->pl);
1876 phylink_destroy(p->dp->pl);
1878 gro_cells_destroy(&p->gcells);
1880 free_percpu(slave_dev->tstats);
1881 free_netdev(slave_dev);
1886 void dsa_slave_destroy(struct net_device *slave_dev)
1888 struct net_device *master = dsa_slave_to_master(slave_dev);
1889 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1890 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1892 netif_carrier_off(slave_dev);
1894 netdev_upper_dev_unlink(master, slave_dev);
1895 unregister_netdevice(slave_dev);
1896 phylink_disconnect_phy(dp->pl);
1899 phylink_destroy(dp->pl);
1900 gro_cells_destroy(&p->gcells);
1901 free_percpu(slave_dev->tstats);
1902 free_netdev(slave_dev);
1905 bool dsa_slave_dev_check(const struct net_device *dev)
1907 return dev->netdev_ops == &dsa_slave_netdev_ops;
1909 EXPORT_SYMBOL_GPL(dsa_slave_dev_check);
1911 static int dsa_slave_changeupper(struct net_device *dev,
1912 struct netdev_notifier_changeupper_info *info)
1914 struct dsa_port *dp = dsa_slave_to_port(dev);
1915 int err = NOTIFY_DONE;
1917 if (netif_is_bridge_master(info->upper_dev)) {
1918 if (info->linking) {
1919 err = dsa_port_bridge_join(dp, info->upper_dev);
1921 dsa_bridge_mtu_normalization(dp);
1922 err = notifier_from_errno(err);
1924 dsa_port_bridge_leave(dp, info->upper_dev);
1927 } else if (netif_is_lag_master(info->upper_dev)) {
1928 if (info->linking) {
1929 err = dsa_port_lag_join(dp, info->upper_dev,
1931 if (err == -EOPNOTSUPP) {
1932 NL_SET_ERR_MSG_MOD(info->info.extack,
1933 "Offloading not supported");
1936 err = notifier_from_errno(err);
1938 dsa_port_lag_leave(dp, info->upper_dev);
1947 dsa_slave_lag_changeupper(struct net_device *dev,
1948 struct netdev_notifier_changeupper_info *info)
1950 struct net_device *lower;
1951 struct list_head *iter;
1952 int err = NOTIFY_DONE;
1953 struct dsa_port *dp;
1955 netdev_for_each_lower_dev(dev, lower, iter) {
1956 if (!dsa_slave_dev_check(lower))
1959 dp = dsa_slave_to_port(lower);
1964 err = dsa_slave_changeupper(lower, info);
1965 if (notifier_to_errno(err))
1973 dsa_prevent_bridging_8021q_upper(struct net_device *dev,
1974 struct netdev_notifier_changeupper_info *info)
1976 struct netlink_ext_ack *ext_ack;
1977 struct net_device *slave;
1978 struct dsa_port *dp;
1980 ext_ack = netdev_notifier_info_to_extack(&info->info);
1982 if (!is_vlan_dev(dev))
1985 slave = vlan_dev_real_dev(dev);
1986 if (!dsa_slave_dev_check(slave))
1989 dp = dsa_slave_to_port(slave);
1990 if (!dp->bridge_dev)
1993 /* Deny enslaving a VLAN device into a VLAN-aware bridge */
1994 if (br_vlan_enabled(dp->bridge_dev) &&
1995 netif_is_bridge_master(info->upper_dev) && info->linking) {
1996 NL_SET_ERR_MSG_MOD(ext_ack,
1997 "Cannot enslave VLAN device into VLAN aware bridge");
1998 return notifier_from_errno(-EINVAL);
2005 dsa_slave_check_8021q_upper(struct net_device *dev,
2006 struct netdev_notifier_changeupper_info *info)
2008 struct dsa_port *dp = dsa_slave_to_port(dev);
2009 struct net_device *br = dp->bridge_dev;
2010 struct bridge_vlan_info br_info;
2011 struct netlink_ext_ack *extack;
2012 int err = NOTIFY_DONE;
2015 if (!br || !br_vlan_enabled(br))
2018 extack = netdev_notifier_info_to_extack(&info->info);
2019 vid = vlan_dev_vlan_id(info->upper_dev);
2021 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
2022 * device, respectively the VID is not found, returning
2023 * 0 means success, which is a failure for us here.
2025 err = br_vlan_get_info(br, vid, &br_info);
2027 NL_SET_ERR_MSG_MOD(extack,
2028 "This VLAN is already configured by the bridge");
2029 return notifier_from_errno(-EBUSY);
2035 static int dsa_slave_netdevice_event(struct notifier_block *nb,
2036 unsigned long event, void *ptr)
2038 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2041 case NETDEV_PRECHANGEUPPER: {
2042 struct netdev_notifier_changeupper_info *info = ptr;
2043 struct dsa_switch *ds;
2044 struct dsa_port *dp;
2047 if (!dsa_slave_dev_check(dev))
2048 return dsa_prevent_bridging_8021q_upper(dev, ptr);
2050 dp = dsa_slave_to_port(dev);
2053 if (ds->ops->port_prechangeupper) {
2054 err = ds->ops->port_prechangeupper(ds, dp->index, info);
2056 return notifier_from_errno(err);
2059 if (is_vlan_dev(info->upper_dev))
2060 return dsa_slave_check_8021q_upper(dev, ptr);
2063 case NETDEV_CHANGEUPPER:
2064 if (dsa_slave_dev_check(dev))
2065 return dsa_slave_changeupper(dev, ptr);
2067 if (netif_is_lag_master(dev))
2068 return dsa_slave_lag_changeupper(dev, ptr);
2071 case NETDEV_CHANGELOWERSTATE: {
2072 struct netdev_notifier_changelowerstate_info *info = ptr;
2073 struct dsa_port *dp;
2076 if (!dsa_slave_dev_check(dev))
2079 dp = dsa_slave_to_port(dev);
2081 err = dsa_port_lag_change(dp, info->lower_state_info);
2082 return notifier_from_errno(err);
2084 case NETDEV_GOING_DOWN: {
2085 struct dsa_port *dp, *cpu_dp;
2086 struct dsa_switch_tree *dst;
2087 LIST_HEAD(close_list);
2089 if (!netdev_uses_dsa(dev))
2092 cpu_dp = dev->dsa_ptr;
2093 dst = cpu_dp->ds->dst;
2095 list_for_each_entry(dp, &dst->ports, list) {
2096 if (!dsa_is_user_port(dp->ds, dp->index))
2099 list_add(&dp->slave->close_list, &close_list);
2102 dev_close_many(&close_list, true);
2114 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work)
2116 struct dsa_switch *ds = switchdev_work->ds;
2117 struct switchdev_notifier_fdb_info info;
2118 struct dsa_port *dp;
2120 if (!dsa_is_user_port(ds, switchdev_work->port))
2123 info.addr = switchdev_work->addr;
2124 info.vid = switchdev_work->vid;
2125 info.offloaded = true;
2126 dp = dsa_to_port(ds, switchdev_work->port);
2127 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
2128 dp->slave, &info.info, NULL);
2131 static void dsa_slave_switchdev_event_work(struct work_struct *work)
2133 struct dsa_switchdev_event_work *switchdev_work =
2134 container_of(work, struct dsa_switchdev_event_work, work);
2135 struct dsa_switch *ds = switchdev_work->ds;
2136 struct dsa_port *dp;
2139 dp = dsa_to_port(ds, switchdev_work->port);
2142 switch (switchdev_work->event) {
2143 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2144 err = dsa_port_fdb_add(dp, switchdev_work->addr,
2145 switchdev_work->vid);
2148 "port %d failed to add %pM vid %d to fdb: %d\n",
2149 dp->index, switchdev_work->addr,
2150 switchdev_work->vid, err);
2153 dsa_fdb_offload_notify(switchdev_work);
2156 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2157 err = dsa_port_fdb_del(dp, switchdev_work->addr,
2158 switchdev_work->vid);
2161 "port %d failed to delete %pM vid %d from fdb: %d\n",
2162 dp->index, switchdev_work->addr,
2163 switchdev_work->vid, err);
2170 kfree(switchdev_work);
2171 if (dsa_is_user_port(ds, dp->index))
2175 static int dsa_lower_dev_walk(struct net_device *lower_dev,
2176 struct netdev_nested_priv *priv)
2178 if (dsa_slave_dev_check(lower_dev)) {
2179 priv->data = (void *)netdev_priv(lower_dev);
2186 static struct dsa_slave_priv *dsa_slave_dev_lower_find(struct net_device *dev)
2188 struct netdev_nested_priv priv = {
2192 netdev_walk_all_lower_dev_rcu(dev, dsa_lower_dev_walk, &priv);
2194 return (struct dsa_slave_priv *)priv.data;
2197 /* Called under rcu_read_lock() */
2198 static int dsa_slave_switchdev_event(struct notifier_block *unused,
2199 unsigned long event, void *ptr)
2201 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2202 const struct switchdev_notifier_fdb_info *fdb_info;
2203 struct dsa_switchdev_event_work *switchdev_work;
2204 struct dsa_port *dp;
2208 case SWITCHDEV_PORT_ATTR_SET:
2209 err = switchdev_handle_port_attr_set(dev, ptr,
2210 dsa_slave_dev_check,
2211 dsa_slave_port_attr_set);
2212 return notifier_from_errno(err);
2213 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2214 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2217 if (dsa_slave_dev_check(dev)) {
2218 if (!fdb_info->added_by_user)
2221 dp = dsa_slave_to_port(dev);
2223 /* Snoop addresses learnt on foreign interfaces
2224 * bridged with us, for switches that don't
2225 * automatically learn SA from CPU-injected traffic
2227 struct net_device *br_dev;
2228 struct dsa_slave_priv *p;
2230 br_dev = netdev_master_upper_dev_get_rcu(dev);
2234 if (!netif_is_bridge_master(br_dev))
2237 p = dsa_slave_dev_lower_find(br_dev);
2243 if (!dp->ds->assisted_learning_on_cpu_port)
2246 /* When the bridge learns an address on an offloaded
2247 * LAG we don't want to send traffic to the CPU, the
2248 * other ports bridged with the LAG should be able to
2249 * autonomously forward towards it.
2251 if (dsa_tree_offloads_netdev(dp->ds->dst, dev))
2255 if (!dp->ds->ops->port_fdb_add || !dp->ds->ops->port_fdb_del)
2258 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2259 if (!switchdev_work)
2262 INIT_WORK(&switchdev_work->work,
2263 dsa_slave_switchdev_event_work);
2264 switchdev_work->ds = dp->ds;
2265 switchdev_work->port = dp->index;
2266 switchdev_work->event = event;
2268 ether_addr_copy(switchdev_work->addr,
2270 switchdev_work->vid = fdb_info->vid;
2272 /* Hold a reference on the slave for dsa_fdb_offload_notify */
2273 if (dsa_is_user_port(dp->ds, dp->index))
2275 dsa_schedule_work(&switchdev_work->work);
2284 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
2285 unsigned long event, void *ptr)
2287 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2291 case SWITCHDEV_PORT_OBJ_ADD:
2292 err = switchdev_handle_port_obj_add(dev, ptr,
2293 dsa_slave_dev_check,
2294 dsa_slave_port_obj_add);
2295 return notifier_from_errno(err);
2296 case SWITCHDEV_PORT_OBJ_DEL:
2297 err = switchdev_handle_port_obj_del(dev, ptr,
2298 dsa_slave_dev_check,
2299 dsa_slave_port_obj_del);
2300 return notifier_from_errno(err);
2301 case SWITCHDEV_PORT_ATTR_SET:
2302 err = switchdev_handle_port_attr_set(dev, ptr,
2303 dsa_slave_dev_check,
2304 dsa_slave_port_attr_set);
2305 return notifier_from_errno(err);
2311 static struct notifier_block dsa_slave_nb __read_mostly = {
2312 .notifier_call = dsa_slave_netdevice_event,
2315 static struct notifier_block dsa_slave_switchdev_notifier = {
2316 .notifier_call = dsa_slave_switchdev_event,
2319 static struct notifier_block dsa_slave_switchdev_blocking_notifier = {
2320 .notifier_call = dsa_slave_switchdev_blocking_event,
2323 int dsa_slave_register_notifier(void)
2325 struct notifier_block *nb;
2328 err = register_netdevice_notifier(&dsa_slave_nb);
2332 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
2334 goto err_switchdev_nb;
2336 nb = &dsa_slave_switchdev_blocking_notifier;
2337 err = register_switchdev_blocking_notifier(nb);
2339 goto err_switchdev_blocking_nb;
2343 err_switchdev_blocking_nb:
2344 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2346 unregister_netdevice_notifier(&dsa_slave_nb);
2350 void dsa_slave_unregister_notifier(void)
2352 struct notifier_block *nb;
2355 nb = &dsa_slave_switchdev_blocking_notifier;
2356 err = unregister_switchdev_blocking_notifier(nb);
2358 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
2360 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2362 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
2364 err = unregister_netdevice_notifier(&dsa_slave_nb);
2366 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);