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 if (!(master->flags & IFF_UP))
74 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
75 err = dev_uc_add(master, dev->dev_addr);
80 if (dev->flags & IFF_ALLMULTI) {
81 err = dev_set_allmulti(master, 1);
85 if (dev->flags & IFF_PROMISC) {
86 err = dev_set_promiscuity(master, 1);
91 err = dsa_port_enable_rt(dp, dev->phydev);
98 if (dev->flags & IFF_PROMISC)
99 dev_set_promiscuity(master, -1);
101 if (dev->flags & IFF_ALLMULTI)
102 dev_set_allmulti(master, -1);
104 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
105 dev_uc_del(master, dev->dev_addr);
110 static int dsa_slave_close(struct net_device *dev)
112 struct net_device *master = dsa_slave_to_master(dev);
113 struct dsa_port *dp = dsa_slave_to_port(dev);
115 dsa_port_disable_rt(dp);
117 dev_mc_unsync(master, dev);
118 dev_uc_unsync(master, dev);
119 if (dev->flags & IFF_ALLMULTI)
120 dev_set_allmulti(master, -1);
121 if (dev->flags & IFF_PROMISC)
122 dev_set_promiscuity(master, -1);
124 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
125 dev_uc_del(master, dev->dev_addr);
130 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
132 struct net_device *master = dsa_slave_to_master(dev);
133 if (dev->flags & IFF_UP) {
134 if (change & IFF_ALLMULTI)
135 dev_set_allmulti(master,
136 dev->flags & IFF_ALLMULTI ? 1 : -1);
137 if (change & IFF_PROMISC)
138 dev_set_promiscuity(master,
139 dev->flags & IFF_PROMISC ? 1 : -1);
143 static void dsa_slave_set_rx_mode(struct net_device *dev)
145 struct net_device *master = dsa_slave_to_master(dev);
147 dev_mc_sync(master, dev);
148 dev_uc_sync(master, dev);
151 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
153 struct net_device *master = dsa_slave_to_master(dev);
154 struct sockaddr *addr = a;
157 if (!is_valid_ether_addr(addr->sa_data))
158 return -EADDRNOTAVAIL;
160 if (!(dev->flags & IFF_UP))
163 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
164 err = dev_uc_add(master, addr->sa_data);
169 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
170 dev_uc_del(master, dev->dev_addr);
173 ether_addr_copy(dev->dev_addr, addr->sa_data);
178 struct dsa_slave_dump_ctx {
179 struct net_device *dev;
181 struct netlink_callback *cb;
186 dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid,
187 bool is_static, void *data)
189 struct dsa_slave_dump_ctx *dump = data;
190 u32 portid = NETLINK_CB(dump->cb->skb).portid;
191 u32 seq = dump->cb->nlh->nlmsg_seq;
192 struct nlmsghdr *nlh;
195 if (dump->idx < dump->cb->args[2])
198 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
199 sizeof(*ndm), NLM_F_MULTI);
203 ndm = nlmsg_data(nlh);
204 ndm->ndm_family = AF_BRIDGE;
207 ndm->ndm_flags = NTF_SELF;
209 ndm->ndm_ifindex = dump->dev->ifindex;
210 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
212 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
213 goto nla_put_failure;
215 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
216 goto nla_put_failure;
218 nlmsg_end(dump->skb, nlh);
225 nlmsg_cancel(dump->skb, nlh);
230 dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
231 struct net_device *dev, struct net_device *filter_dev,
234 struct dsa_port *dp = dsa_slave_to_port(dev);
235 struct dsa_slave_dump_ctx dump = {
243 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump);
249 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
251 struct dsa_slave_priv *p = netdev_priv(dev);
252 struct dsa_switch *ds = p->dp->ds;
253 int port = p->dp->index;
255 /* Pass through to switch driver if it supports timestamping */
258 if (ds->ops->port_hwtstamp_get)
259 return ds->ops->port_hwtstamp_get(ds, port, ifr);
262 if (ds->ops->port_hwtstamp_set)
263 return ds->ops->port_hwtstamp_set(ds, port, ifr);
267 return phylink_mii_ioctl(p->dp->pl, ifr, cmd);
270 static int dsa_slave_port_attr_set(struct net_device *dev,
271 const struct switchdev_attr *attr,
272 struct switchdev_trans *trans)
274 struct dsa_port *dp = dsa_slave_to_port(dev);
278 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
279 ret = dsa_port_set_state(dp, attr->u.stp_state, trans);
281 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
282 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
285 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
286 ret = dsa_port_ageing_time(dp, attr->u.ageing_time, trans);
288 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
289 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags,
292 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
293 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, trans);
295 case SWITCHDEV_ATTR_ID_BRIDGE_MROUTER:
296 ret = dsa_port_mrouter(dp->cpu_dp, attr->u.mrouter, trans);
306 /* Must be called under rcu_read_lock() */
308 dsa_slave_vlan_check_for_8021q_uppers(struct net_device *slave,
309 const struct switchdev_obj_port_vlan *vlan)
311 struct net_device *upper_dev;
312 struct list_head *iter;
314 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) {
317 if (!is_vlan_dev(upper_dev))
320 vid = vlan_dev_vlan_id(upper_dev);
321 if (vid == vlan->vid)
328 static int dsa_slave_vlan_add(struct net_device *dev,
329 const struct switchdev_obj *obj,
330 struct switchdev_trans *trans)
332 struct net_device *master = dsa_slave_to_master(dev);
333 struct dsa_port *dp = dsa_slave_to_port(dev);
334 struct switchdev_obj_port_vlan vlan;
337 if (obj->orig_dev != dev)
340 if (dsa_port_skip_vlan_configuration(dp))
343 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj);
345 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with
348 if (trans->ph_prepare && br_vlan_enabled(dp->bridge_dev)) {
350 err = dsa_slave_vlan_check_for_8021q_uppers(dev, &vlan);
356 err = dsa_port_vlan_add(dp, &vlan, trans);
360 /* We need the dedicated CPU port to be a member of the VLAN as well.
361 * Even though drivers often handle CPU membership in special ways,
362 * it doesn't make sense to program a PVID, so clear this flag.
364 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID;
366 err = dsa_port_vlan_add(dp->cpu_dp, &vlan, trans);
370 return vlan_vid_add(master, htons(ETH_P_8021Q), vlan.vid);
373 static int dsa_slave_port_obj_add(struct net_device *dev,
374 const struct switchdev_obj *obj,
375 struct switchdev_trans *trans,
376 struct netlink_ext_ack *extack)
378 struct dsa_port *dp = dsa_slave_to_port(dev);
381 /* For the prepare phase, ensure the full set of changes is feasable in
382 * one go in order to signal a failure properly. If an operation is not
383 * supported, return -EOPNOTSUPP.
387 case SWITCHDEV_OBJ_ID_PORT_MDB:
388 if (obj->orig_dev != dev)
390 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans);
392 case SWITCHDEV_OBJ_ID_HOST_MDB:
393 /* DSA can directly translate this to a normal MDB add,
394 * but on the CPU port.
396 err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj),
399 case SWITCHDEV_OBJ_ID_PORT_VLAN:
400 err = dsa_slave_vlan_add(dev, obj, trans);
410 static int dsa_slave_vlan_del(struct net_device *dev,
411 const struct switchdev_obj *obj)
413 struct net_device *master = dsa_slave_to_master(dev);
414 struct dsa_port *dp = dsa_slave_to_port(dev);
415 struct switchdev_obj_port_vlan *vlan;
418 if (obj->orig_dev != dev)
421 if (dsa_port_skip_vlan_configuration(dp))
424 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
426 /* Do not deprogram the CPU port as it may be shared with other user
427 * ports which can be members of this VLAN as well.
429 err = dsa_port_vlan_del(dp, vlan);
433 vlan_vid_del(master, htons(ETH_P_8021Q), vlan->vid);
438 static int dsa_slave_port_obj_del(struct net_device *dev,
439 const struct switchdev_obj *obj)
441 struct dsa_port *dp = dsa_slave_to_port(dev);
445 case SWITCHDEV_OBJ_ID_PORT_MDB:
446 if (obj->orig_dev != dev)
448 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
450 case SWITCHDEV_OBJ_ID_HOST_MDB:
451 /* DSA can directly translate this to a normal MDB add,
452 * but on the CPU port.
454 err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj));
456 case SWITCHDEV_OBJ_ID_PORT_VLAN:
457 err = dsa_slave_vlan_del(dev, obj);
467 static int dsa_slave_get_port_parent_id(struct net_device *dev,
468 struct netdev_phys_item_id *ppid)
470 struct dsa_port *dp = dsa_slave_to_port(dev);
471 struct dsa_switch *ds = dp->ds;
472 struct dsa_switch_tree *dst = ds->dst;
474 /* For non-legacy ports, devlink is used and it takes
475 * care of the name generation. This ndo implementation
476 * should be removed with legacy support.
481 ppid->id_len = sizeof(dst->index);
482 memcpy(&ppid->id, &dst->index, ppid->id_len);
487 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
490 #ifdef CONFIG_NET_POLL_CONTROLLER
491 struct dsa_slave_priv *p = netdev_priv(dev);
493 return netpoll_send_skb(p->netpoll, skb);
500 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
503 struct dsa_switch *ds = p->dp->ds;
504 struct sk_buff *clone;
507 type = ptp_classify_raw(skb);
508 if (type == PTP_CLASS_NONE)
511 if (!ds->ops->port_txtstamp)
514 clone = skb_clone_sk(skb);
518 if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type)) {
519 DSA_SKB_CB(skb)->clone = clone;
526 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
528 /* SKB for netpoll still need to be mangled with the protocol-specific
529 * tag to be successfully transmitted
531 if (unlikely(netpoll_tx_running(dev)))
532 return dsa_slave_netpoll_send_skb(dev, skb);
534 /* Queue the SKB for transmission on the parent interface, but
535 * do not modify its EtherType
537 skb->dev = dsa_slave_to_master(dev);
542 EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
544 static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev)
546 int needed_headroom = dev->needed_headroom;
547 int needed_tailroom = dev->needed_tailroom;
549 /* For tail taggers, we need to pad short frames ourselves, to ensure
550 * that the tail tag does not fail at its role of being at the end of
551 * the packet, once the master interface pads the frame. Account for
552 * that pad length here, and pad later.
554 if (unlikely(needed_tailroom && skb->len < ETH_ZLEN))
555 needed_tailroom += ETH_ZLEN - skb->len;
556 /* skb_headroom() returns unsigned int... */
557 needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0);
558 needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0);
560 if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb)))
561 /* No reallocation needed, yay! */
564 return pskb_expand_head(skb, needed_headroom, needed_tailroom,
568 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
570 struct dsa_slave_priv *p = netdev_priv(dev);
571 struct sk_buff *nskb;
573 dev_sw_netstats_tx_add(dev, 1, skb->len);
575 DSA_SKB_CB(skb)->clone = NULL;
577 /* Identify PTP protocol packets, clone them, and pass them to the
580 dsa_skb_tx_timestamp(p, skb);
582 if (dsa_realloc_skb(skb, dev)) {
583 dev_kfree_skb_any(skb);
587 /* needed_tailroom should still be 'warm' in the cache line from
588 * dsa_realloc_skb(), which has also ensured that padding is safe.
590 if (dev->needed_tailroom)
593 /* Transmit function may have to reallocate the original SKB,
594 * in which case it must have freed it. Only free it here on error.
596 nskb = p->xmit(skb, dev);
602 return dsa_enqueue_skb(nskb, dev);
605 /* ethtool operations *******************************************************/
607 static void dsa_slave_get_drvinfo(struct net_device *dev,
608 struct ethtool_drvinfo *drvinfo)
610 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
611 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
612 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
615 static int dsa_slave_get_regs_len(struct net_device *dev)
617 struct dsa_port *dp = dsa_slave_to_port(dev);
618 struct dsa_switch *ds = dp->ds;
620 if (ds->ops->get_regs_len)
621 return ds->ops->get_regs_len(ds, dp->index);
627 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
629 struct dsa_port *dp = dsa_slave_to_port(dev);
630 struct dsa_switch *ds = dp->ds;
632 if (ds->ops->get_regs)
633 ds->ops->get_regs(ds, dp->index, regs, _p);
636 static int dsa_slave_nway_reset(struct net_device *dev)
638 struct dsa_port *dp = dsa_slave_to_port(dev);
640 return phylink_ethtool_nway_reset(dp->pl);
643 static int dsa_slave_get_eeprom_len(struct net_device *dev)
645 struct dsa_port *dp = dsa_slave_to_port(dev);
646 struct dsa_switch *ds = dp->ds;
648 if (ds->cd && ds->cd->eeprom_len)
649 return ds->cd->eeprom_len;
651 if (ds->ops->get_eeprom_len)
652 return ds->ops->get_eeprom_len(ds);
657 static int dsa_slave_get_eeprom(struct net_device *dev,
658 struct ethtool_eeprom *eeprom, u8 *data)
660 struct dsa_port *dp = dsa_slave_to_port(dev);
661 struct dsa_switch *ds = dp->ds;
663 if (ds->ops->get_eeprom)
664 return ds->ops->get_eeprom(ds, eeprom, data);
669 static int dsa_slave_set_eeprom(struct net_device *dev,
670 struct ethtool_eeprom *eeprom, u8 *data)
672 struct dsa_port *dp = dsa_slave_to_port(dev);
673 struct dsa_switch *ds = dp->ds;
675 if (ds->ops->set_eeprom)
676 return ds->ops->set_eeprom(ds, eeprom, data);
681 static void dsa_slave_get_strings(struct net_device *dev,
682 uint32_t stringset, uint8_t *data)
684 struct dsa_port *dp = dsa_slave_to_port(dev);
685 struct dsa_switch *ds = dp->ds;
687 if (stringset == ETH_SS_STATS) {
688 int len = ETH_GSTRING_LEN;
690 strncpy(data, "tx_packets", len);
691 strncpy(data + len, "tx_bytes", len);
692 strncpy(data + 2 * len, "rx_packets", len);
693 strncpy(data + 3 * len, "rx_bytes", len);
694 if (ds->ops->get_strings)
695 ds->ops->get_strings(ds, dp->index, stringset,
700 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
701 struct ethtool_stats *stats,
704 struct dsa_port *dp = dsa_slave_to_port(dev);
705 struct dsa_switch *ds = dp->ds;
706 struct pcpu_sw_netstats *s;
710 for_each_possible_cpu(i) {
711 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
713 s = per_cpu_ptr(dev->tstats, i);
715 start = u64_stats_fetch_begin_irq(&s->syncp);
716 tx_packets = s->tx_packets;
717 tx_bytes = s->tx_bytes;
718 rx_packets = s->rx_packets;
719 rx_bytes = s->rx_bytes;
720 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
721 data[0] += tx_packets;
723 data[2] += rx_packets;
726 if (ds->ops->get_ethtool_stats)
727 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
730 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
732 struct dsa_port *dp = dsa_slave_to_port(dev);
733 struct dsa_switch *ds = dp->ds;
735 if (sset == ETH_SS_STATS) {
739 if (ds->ops->get_sset_count)
740 count += ds->ops->get_sset_count(ds, dp->index, sset);
748 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
750 struct dsa_port *dp = dsa_slave_to_port(dev);
751 struct dsa_switch *ds = dp->ds;
753 phylink_ethtool_get_wol(dp->pl, w);
755 if (ds->ops->get_wol)
756 ds->ops->get_wol(ds, dp->index, w);
759 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
761 struct dsa_port *dp = dsa_slave_to_port(dev);
762 struct dsa_switch *ds = dp->ds;
763 int ret = -EOPNOTSUPP;
765 phylink_ethtool_set_wol(dp->pl, w);
767 if (ds->ops->set_wol)
768 ret = ds->ops->set_wol(ds, dp->index, w);
773 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
775 struct dsa_port *dp = dsa_slave_to_port(dev);
776 struct dsa_switch *ds = dp->ds;
779 /* Port's PHY and MAC both need to be EEE capable */
780 if (!dev->phydev || !dp->pl)
783 if (!ds->ops->set_mac_eee)
786 ret = ds->ops->set_mac_eee(ds, dp->index, e);
790 return phylink_ethtool_set_eee(dp->pl, e);
793 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
795 struct dsa_port *dp = dsa_slave_to_port(dev);
796 struct dsa_switch *ds = dp->ds;
799 /* Port's PHY and MAC both need to be EEE capable */
800 if (!dev->phydev || !dp->pl)
803 if (!ds->ops->get_mac_eee)
806 ret = ds->ops->get_mac_eee(ds, dp->index, e);
810 return phylink_ethtool_get_eee(dp->pl, e);
813 static int dsa_slave_get_link_ksettings(struct net_device *dev,
814 struct ethtool_link_ksettings *cmd)
816 struct dsa_port *dp = dsa_slave_to_port(dev);
818 return phylink_ethtool_ksettings_get(dp->pl, cmd);
821 static int dsa_slave_set_link_ksettings(struct net_device *dev,
822 const struct ethtool_link_ksettings *cmd)
824 struct dsa_port *dp = dsa_slave_to_port(dev);
826 return phylink_ethtool_ksettings_set(dp->pl, cmd);
829 static void dsa_slave_get_pauseparam(struct net_device *dev,
830 struct ethtool_pauseparam *pause)
832 struct dsa_port *dp = dsa_slave_to_port(dev);
834 phylink_ethtool_get_pauseparam(dp->pl, pause);
837 static int dsa_slave_set_pauseparam(struct net_device *dev,
838 struct ethtool_pauseparam *pause)
840 struct dsa_port *dp = dsa_slave_to_port(dev);
842 return phylink_ethtool_set_pauseparam(dp->pl, pause);
845 #ifdef CONFIG_NET_POLL_CONTROLLER
846 static int dsa_slave_netpoll_setup(struct net_device *dev,
847 struct netpoll_info *ni)
849 struct net_device *master = dsa_slave_to_master(dev);
850 struct dsa_slave_priv *p = netdev_priv(dev);
851 struct netpoll *netpoll;
854 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
858 err = __netpoll_setup(netpoll, master);
864 p->netpoll = netpoll;
869 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
871 struct dsa_slave_priv *p = netdev_priv(dev);
872 struct netpoll *netpoll = p->netpoll;
879 __netpoll_free(netpoll);
882 static void dsa_slave_poll_controller(struct net_device *dev)
887 static int dsa_slave_get_phys_port_name(struct net_device *dev,
888 char *name, size_t len)
890 struct dsa_port *dp = dsa_slave_to_port(dev);
892 /* For non-legacy ports, devlink is used and it takes
893 * care of the name generation. This ndo implementation
894 * should be removed with legacy support.
899 if (snprintf(name, len, "p%d", dp->index) >= len)
905 static struct dsa_mall_tc_entry *
906 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
908 struct dsa_slave_priv *p = netdev_priv(dev);
909 struct dsa_mall_tc_entry *mall_tc_entry;
911 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
912 if (mall_tc_entry->cookie == cookie)
913 return mall_tc_entry;
919 dsa_slave_add_cls_matchall_mirred(struct net_device *dev,
920 struct tc_cls_matchall_offload *cls,
923 struct dsa_port *dp = dsa_slave_to_port(dev);
924 struct dsa_slave_priv *p = netdev_priv(dev);
925 struct dsa_mall_mirror_tc_entry *mirror;
926 struct dsa_mall_tc_entry *mall_tc_entry;
927 struct dsa_switch *ds = dp->ds;
928 struct flow_action_entry *act;
929 struct dsa_port *to_dp;
932 if (!ds->ops->port_mirror_add)
935 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
939 act = &cls->rule->action.entries[0];
944 if (!dsa_slave_dev_check(act->dev))
947 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
951 mall_tc_entry->cookie = cls->cookie;
952 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
953 mirror = &mall_tc_entry->mirror;
955 to_dp = dsa_slave_to_port(act->dev);
957 mirror->to_local_port = to_dp->index;
958 mirror->ingress = ingress;
960 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
962 kfree(mall_tc_entry);
966 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
972 dsa_slave_add_cls_matchall_police(struct net_device *dev,
973 struct tc_cls_matchall_offload *cls,
976 struct netlink_ext_ack *extack = cls->common.extack;
977 struct dsa_port *dp = dsa_slave_to_port(dev);
978 struct dsa_slave_priv *p = netdev_priv(dev);
979 struct dsa_mall_policer_tc_entry *policer;
980 struct dsa_mall_tc_entry *mall_tc_entry;
981 struct dsa_switch *ds = dp->ds;
982 struct flow_action_entry *act;
985 if (!ds->ops->port_policer_add) {
986 NL_SET_ERR_MSG_MOD(extack,
987 "Policing offload not implemented");
992 NL_SET_ERR_MSG_MOD(extack,
993 "Only supported on ingress qdisc");
997 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
1001 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) {
1002 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) {
1003 NL_SET_ERR_MSG_MOD(extack,
1004 "Only one port policer allowed");
1009 act = &cls->rule->action.entries[0];
1011 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1015 mall_tc_entry->cookie = cls->cookie;
1016 mall_tc_entry->type = DSA_PORT_MALL_POLICER;
1017 policer = &mall_tc_entry->policer;
1018 policer->rate_bytes_per_sec = act->police.rate_bytes_ps;
1019 policer->burst = act->police.burst;
1021 err = ds->ops->port_policer_add(ds, dp->index, policer);
1023 kfree(mall_tc_entry);
1027 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
1032 static int dsa_slave_add_cls_matchall(struct net_device *dev,
1033 struct tc_cls_matchall_offload *cls,
1036 int err = -EOPNOTSUPP;
1038 if (cls->common.protocol == htons(ETH_P_ALL) &&
1039 flow_offload_has_one_action(&cls->rule->action) &&
1040 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED)
1041 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress);
1042 else if (flow_offload_has_one_action(&cls->rule->action) &&
1043 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE)
1044 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress);
1049 static void dsa_slave_del_cls_matchall(struct net_device *dev,
1050 struct tc_cls_matchall_offload *cls)
1052 struct dsa_port *dp = dsa_slave_to_port(dev);
1053 struct dsa_mall_tc_entry *mall_tc_entry;
1054 struct dsa_switch *ds = dp->ds;
1056 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
1060 list_del(&mall_tc_entry->list);
1062 switch (mall_tc_entry->type) {
1063 case DSA_PORT_MALL_MIRROR:
1064 if (ds->ops->port_mirror_del)
1065 ds->ops->port_mirror_del(ds, dp->index,
1066 &mall_tc_entry->mirror);
1068 case DSA_PORT_MALL_POLICER:
1069 if (ds->ops->port_policer_del)
1070 ds->ops->port_policer_del(ds, dp->index);
1076 kfree(mall_tc_entry);
1079 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
1080 struct tc_cls_matchall_offload *cls,
1083 if (cls->common.chain_index)
1086 switch (cls->command) {
1087 case TC_CLSMATCHALL_REPLACE:
1088 return dsa_slave_add_cls_matchall(dev, cls, ingress);
1089 case TC_CLSMATCHALL_DESTROY:
1090 dsa_slave_del_cls_matchall(dev, cls);
1097 static int dsa_slave_add_cls_flower(struct net_device *dev,
1098 struct flow_cls_offload *cls,
1101 struct dsa_port *dp = dsa_slave_to_port(dev);
1102 struct dsa_switch *ds = dp->ds;
1103 int port = dp->index;
1105 if (!ds->ops->cls_flower_add)
1108 return ds->ops->cls_flower_add(ds, port, cls, ingress);
1111 static int dsa_slave_del_cls_flower(struct net_device *dev,
1112 struct flow_cls_offload *cls,
1115 struct dsa_port *dp = dsa_slave_to_port(dev);
1116 struct dsa_switch *ds = dp->ds;
1117 int port = dp->index;
1119 if (!ds->ops->cls_flower_del)
1122 return ds->ops->cls_flower_del(ds, port, cls, ingress);
1125 static int dsa_slave_stats_cls_flower(struct net_device *dev,
1126 struct flow_cls_offload *cls,
1129 struct dsa_port *dp = dsa_slave_to_port(dev);
1130 struct dsa_switch *ds = dp->ds;
1131 int port = dp->index;
1133 if (!ds->ops->cls_flower_stats)
1136 return ds->ops->cls_flower_stats(ds, port, cls, ingress);
1139 static int dsa_slave_setup_tc_cls_flower(struct net_device *dev,
1140 struct flow_cls_offload *cls,
1143 switch (cls->command) {
1144 case FLOW_CLS_REPLACE:
1145 return dsa_slave_add_cls_flower(dev, cls, ingress);
1146 case FLOW_CLS_DESTROY:
1147 return dsa_slave_del_cls_flower(dev, cls, ingress);
1148 case FLOW_CLS_STATS:
1149 return dsa_slave_stats_cls_flower(dev, cls, ingress);
1155 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
1156 void *cb_priv, bool ingress)
1158 struct net_device *dev = cb_priv;
1160 if (!tc_can_offload(dev))
1164 case TC_SETUP_CLSMATCHALL:
1165 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
1166 case TC_SETUP_CLSFLOWER:
1167 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress);
1173 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
1174 void *type_data, void *cb_priv)
1176 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
1179 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
1180 void *type_data, void *cb_priv)
1182 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
1185 static LIST_HEAD(dsa_slave_block_cb_list);
1187 static int dsa_slave_setup_tc_block(struct net_device *dev,
1188 struct flow_block_offload *f)
1190 struct flow_block_cb *block_cb;
1191 flow_setup_cb_t *cb;
1193 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
1194 cb = dsa_slave_setup_tc_block_cb_ig;
1195 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
1196 cb = dsa_slave_setup_tc_block_cb_eg;
1200 f->driver_block_list = &dsa_slave_block_cb_list;
1202 switch (f->command) {
1203 case FLOW_BLOCK_BIND:
1204 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list))
1207 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL);
1208 if (IS_ERR(block_cb))
1209 return PTR_ERR(block_cb);
1211 flow_block_cb_add(block_cb, f);
1212 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list);
1214 case FLOW_BLOCK_UNBIND:
1215 block_cb = flow_block_cb_lookup(f->block, cb, dev);
1219 flow_block_cb_remove(block_cb, f);
1220 list_del(&block_cb->driver_list);
1227 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
1230 struct dsa_port *dp = dsa_slave_to_port(dev);
1231 struct dsa_switch *ds = dp->ds;
1233 if (type == TC_SETUP_BLOCK)
1234 return dsa_slave_setup_tc_block(dev, type_data);
1236 if (!ds->ops->port_setup_tc)
1239 return ds->ops->port_setup_tc(ds, dp->index, type, type_data);
1242 static int dsa_slave_get_rxnfc(struct net_device *dev,
1243 struct ethtool_rxnfc *nfc, u32 *rule_locs)
1245 struct dsa_port *dp = dsa_slave_to_port(dev);
1246 struct dsa_switch *ds = dp->ds;
1248 if (!ds->ops->get_rxnfc)
1251 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
1254 static int dsa_slave_set_rxnfc(struct net_device *dev,
1255 struct ethtool_rxnfc *nfc)
1257 struct dsa_port *dp = dsa_slave_to_port(dev);
1258 struct dsa_switch *ds = dp->ds;
1260 if (!ds->ops->set_rxnfc)
1263 return ds->ops->set_rxnfc(ds, dp->index, nfc);
1266 static int dsa_slave_get_ts_info(struct net_device *dev,
1267 struct ethtool_ts_info *ts)
1269 struct dsa_slave_priv *p = netdev_priv(dev);
1270 struct dsa_switch *ds = p->dp->ds;
1272 if (!ds->ops->get_ts_info)
1275 return ds->ops->get_ts_info(ds, p->dp->index, ts);
1278 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
1281 struct net_device *master = dsa_slave_to_master(dev);
1282 struct dsa_port *dp = dsa_slave_to_port(dev);
1283 struct switchdev_obj_port_vlan vlan = {
1284 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
1286 /* This API only allows programming tagged, non-PVID VIDs */
1289 struct switchdev_trans trans;
1293 trans.ph_prepare = true;
1294 ret = dsa_port_vlan_add(dp, &vlan, &trans);
1298 trans.ph_prepare = false;
1299 ret = dsa_port_vlan_add(dp, &vlan, &trans);
1303 /* And CPU port... */
1304 trans.ph_prepare = true;
1305 ret = dsa_port_vlan_add(dp->cpu_dp, &vlan, &trans);
1309 trans.ph_prepare = false;
1310 ret = dsa_port_vlan_add(dp->cpu_dp, &vlan, &trans);
1314 return vlan_vid_add(master, proto, vid);
1317 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
1320 struct net_device *master = dsa_slave_to_master(dev);
1321 struct dsa_port *dp = dsa_slave_to_port(dev);
1322 struct switchdev_obj_port_vlan vlan = {
1324 /* This API only allows programming tagged, non-PVID VIDs */
1329 /* Do not deprogram the CPU port as it may be shared with other user
1330 * ports which can be members of this VLAN as well.
1332 err = dsa_port_vlan_del(dp, &vlan);
1336 vlan_vid_del(master, proto, vid);
1341 struct dsa_hw_port {
1342 struct list_head list;
1343 struct net_device *dev;
1347 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu)
1349 const struct dsa_hw_port *p;
1352 list_for_each_entry(p, hw_port_list, list) {
1353 if (p->dev->mtu == mtu)
1356 err = dev_set_mtu(p->dev, mtu);
1364 list_for_each_entry_continue_reverse(p, hw_port_list, list) {
1365 if (p->dev->mtu == p->old_mtu)
1368 if (dev_set_mtu(p->dev, p->old_mtu))
1369 netdev_err(p->dev, "Failed to restore MTU\n");
1375 static void dsa_hw_port_list_free(struct list_head *hw_port_list)
1377 struct dsa_hw_port *p, *n;
1379 list_for_each_entry_safe(p, n, hw_port_list, list)
1383 /* Make the hardware datapath to/from @dev limited to a common MTU */
1384 static void dsa_bridge_mtu_normalization(struct dsa_port *dp)
1386 struct list_head hw_port_list;
1387 struct dsa_switch_tree *dst;
1388 int min_mtu = ETH_MAX_MTU;
1389 struct dsa_port *other_dp;
1392 if (!dp->ds->mtu_enforcement_ingress)
1395 if (!dp->bridge_dev)
1398 INIT_LIST_HEAD(&hw_port_list);
1400 /* Populate the list of ports that are part of the same bridge
1401 * as the newly added/modified port
1403 list_for_each_entry(dst, &dsa_tree_list, list) {
1404 list_for_each_entry(other_dp, &dst->ports, list) {
1405 struct dsa_hw_port *hw_port;
1406 struct net_device *slave;
1408 if (other_dp->type != DSA_PORT_TYPE_USER)
1411 if (other_dp->bridge_dev != dp->bridge_dev)
1414 if (!other_dp->ds->mtu_enforcement_ingress)
1417 slave = other_dp->slave;
1419 if (min_mtu > slave->mtu)
1420 min_mtu = slave->mtu;
1422 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL);
1426 hw_port->dev = slave;
1427 hw_port->old_mtu = slave->mtu;
1429 list_add(&hw_port->list, &hw_port_list);
1433 /* Attempt to configure the entire hardware bridge to the newly added
1434 * interface's MTU first, regardless of whether the intention of the
1435 * user was to raise or lower it.
1437 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu);
1441 /* Clearly that didn't work out so well, so just set the minimum MTU on
1442 * all hardware bridge ports now. If this fails too, then all ports will
1443 * still have their old MTU rolled back anyway.
1445 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu);
1448 dsa_hw_port_list_free(&hw_port_list);
1451 static int dsa_slave_change_mtu(struct net_device *dev, int new_mtu)
1453 struct net_device *master = dsa_slave_to_master(dev);
1454 struct dsa_port *dp = dsa_slave_to_port(dev);
1455 struct dsa_slave_priv *p = netdev_priv(dev);
1456 struct dsa_switch *ds = p->dp->ds;
1457 struct dsa_port *cpu_dp;
1458 int port = p->dp->index;
1459 int largest_mtu = 0;
1466 if (!ds->ops->port_change_mtu)
1469 for (i = 0; i < ds->num_ports; i++) {
1472 if (!dsa_is_user_port(ds, i))
1475 /* During probe, this function will be called for each slave
1476 * device, while not all of them have been allocated. That's
1477 * ok, it doesn't change what the maximum is, so ignore it.
1479 if (!dsa_to_port(ds, i)->slave)
1482 /* Pretend that we already applied the setting, which we
1483 * actually haven't (still haven't done all integrity checks)
1486 slave_mtu = new_mtu;
1488 slave_mtu = dsa_to_port(ds, i)->slave->mtu;
1490 if (largest_mtu < slave_mtu)
1491 largest_mtu = slave_mtu;
1494 cpu_dp = dsa_to_port(ds, port)->cpu_dp;
1496 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu);
1497 old_master_mtu = master->mtu;
1498 new_master_mtu = largest_mtu + cpu_dp->tag_ops->overhead;
1499 if (new_master_mtu > mtu_limit)
1502 /* If the master MTU isn't over limit, there's no need to check the CPU
1503 * MTU, since that surely isn't either.
1505 cpu_mtu = largest_mtu;
1507 /* Start applying stuff */
1508 if (new_master_mtu != old_master_mtu) {
1509 err = dev_set_mtu(master, new_master_mtu);
1511 goto out_master_failed;
1513 /* We only need to propagate the MTU of the CPU port to
1514 * upstream switches.
1516 err = dsa_port_mtu_change(cpu_dp, cpu_mtu, true);
1518 goto out_cpu_failed;
1521 err = dsa_port_mtu_change(dp, new_mtu, false);
1523 goto out_port_failed;
1527 dsa_bridge_mtu_normalization(dp);
1532 if (new_master_mtu != old_master_mtu)
1533 dsa_port_mtu_change(cpu_dp, old_master_mtu -
1534 cpu_dp->tag_ops->overhead,
1537 if (new_master_mtu != old_master_mtu)
1538 dev_set_mtu(master, old_master_mtu);
1543 static const struct ethtool_ops dsa_slave_ethtool_ops = {
1544 .get_drvinfo = dsa_slave_get_drvinfo,
1545 .get_regs_len = dsa_slave_get_regs_len,
1546 .get_regs = dsa_slave_get_regs,
1547 .nway_reset = dsa_slave_nway_reset,
1548 .get_link = ethtool_op_get_link,
1549 .get_eeprom_len = dsa_slave_get_eeprom_len,
1550 .get_eeprom = dsa_slave_get_eeprom,
1551 .set_eeprom = dsa_slave_set_eeprom,
1552 .get_strings = dsa_slave_get_strings,
1553 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
1554 .get_sset_count = dsa_slave_get_sset_count,
1555 .set_wol = dsa_slave_set_wol,
1556 .get_wol = dsa_slave_get_wol,
1557 .set_eee = dsa_slave_set_eee,
1558 .get_eee = dsa_slave_get_eee,
1559 .get_link_ksettings = dsa_slave_get_link_ksettings,
1560 .set_link_ksettings = dsa_slave_set_link_ksettings,
1561 .get_pauseparam = dsa_slave_get_pauseparam,
1562 .set_pauseparam = dsa_slave_set_pauseparam,
1563 .get_rxnfc = dsa_slave_get_rxnfc,
1564 .set_rxnfc = dsa_slave_set_rxnfc,
1565 .get_ts_info = dsa_slave_get_ts_info,
1568 /* legacy way, bypassing the bridge *****************************************/
1569 static int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
1570 struct net_device *dev,
1571 const unsigned char *addr, u16 vid,
1573 struct netlink_ext_ack *extack)
1575 struct dsa_port *dp = dsa_slave_to_port(dev);
1577 return dsa_port_fdb_add(dp, addr, vid);
1580 static int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
1581 struct net_device *dev,
1582 const unsigned char *addr, u16 vid)
1584 struct dsa_port *dp = dsa_slave_to_port(dev);
1586 return dsa_port_fdb_del(dp, addr, vid);
1589 static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
1591 struct dsa_port *dp = dsa_slave_to_port(dev);
1593 return dp->ds->devlink ? &dp->devlink_port : NULL;
1596 static const struct net_device_ops dsa_slave_netdev_ops = {
1597 .ndo_open = dsa_slave_open,
1598 .ndo_stop = dsa_slave_close,
1599 .ndo_start_xmit = dsa_slave_xmit,
1600 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
1601 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
1602 .ndo_set_mac_address = dsa_slave_set_mac_address,
1603 .ndo_fdb_add = dsa_legacy_fdb_add,
1604 .ndo_fdb_del = dsa_legacy_fdb_del,
1605 .ndo_fdb_dump = dsa_slave_fdb_dump,
1606 .ndo_do_ioctl = dsa_slave_ioctl,
1607 .ndo_get_iflink = dsa_slave_get_iflink,
1608 #ifdef CONFIG_NET_POLL_CONTROLLER
1609 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
1610 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
1611 .ndo_poll_controller = dsa_slave_poll_controller,
1613 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
1614 .ndo_setup_tc = dsa_slave_setup_tc,
1615 .ndo_get_stats64 = dev_get_tstats64,
1616 .ndo_get_port_parent_id = dsa_slave_get_port_parent_id,
1617 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
1618 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
1619 .ndo_get_devlink_port = dsa_slave_get_devlink_port,
1620 .ndo_change_mtu = dsa_slave_change_mtu,
1623 static struct device_type dsa_type = {
1627 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
1629 const struct dsa_port *dp = dsa_to_port(ds, port);
1632 phylink_mac_change(dp->pl, up);
1634 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
1636 static void dsa_slave_phylink_fixed_state(struct phylink_config *config,
1637 struct phylink_link_state *state)
1639 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1640 struct dsa_switch *ds = dp->ds;
1642 /* No need to check that this operation is valid, the callback would
1643 * not be called if it was not.
1645 ds->ops->phylink_fixed_state(ds, dp->index, state);
1648 /* slave device setup *******************************************************/
1649 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
1651 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1652 struct dsa_switch *ds = dp->ds;
1654 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
1655 if (!slave_dev->phydev) {
1656 netdev_err(slave_dev, "no phy at %d\n", addr);
1660 return phylink_connect_phy(dp->pl, slave_dev->phydev);
1663 static int dsa_slave_phy_setup(struct net_device *slave_dev)
1665 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1666 struct device_node *port_dn = dp->dn;
1667 struct dsa_switch *ds = dp->ds;
1668 phy_interface_t mode;
1672 ret = of_get_phy_mode(port_dn, &mode);
1674 mode = PHY_INTERFACE_MODE_NA;
1676 dp->pl_config.dev = &slave_dev->dev;
1677 dp->pl_config.type = PHYLINK_NETDEV;
1679 /* The get_fixed_state callback takes precedence over polling the
1680 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set
1681 * this if the switch provides such a callback.
1683 if (ds->ops->phylink_fixed_state) {
1684 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state;
1685 dp->pl_config.poll_fixed_state = true;
1688 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode,
1689 &dsa_port_phylink_mac_ops);
1690 if (IS_ERR(dp->pl)) {
1691 netdev_err(slave_dev,
1692 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1693 return PTR_ERR(dp->pl);
1696 if (ds->ops->get_phy_flags)
1697 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
1699 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
1700 if (ret == -ENODEV && ds->slave_mii_bus) {
1701 /* We could not connect to a designated PHY or SFP, so try to
1702 * use the switch internal MDIO bus instead
1704 ret = dsa_slave_phy_connect(slave_dev, dp->index);
1706 netdev_err(slave_dev,
1707 "failed to connect to port %d: %d\n",
1709 phylink_destroy(dp->pl);
1717 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1718 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1719 struct netdev_queue *txq,
1722 lockdep_set_class(&txq->_xmit_lock,
1723 &dsa_slave_netdev_xmit_lock_key);
1726 int dsa_slave_suspend(struct net_device *slave_dev)
1728 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1730 if (!netif_running(slave_dev))
1733 netif_device_detach(slave_dev);
1736 phylink_stop(dp->pl);
1742 int dsa_slave_resume(struct net_device *slave_dev)
1744 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1746 if (!netif_running(slave_dev))
1749 netif_device_attach(slave_dev);
1752 phylink_start(dp->pl);
1758 int dsa_slave_create(struct dsa_port *port)
1760 const struct dsa_port *cpu_dp = port->cpu_dp;
1761 struct net_device *master = cpu_dp->master;
1762 struct dsa_switch *ds = port->ds;
1763 const char *name = port->name;
1764 struct net_device *slave_dev;
1765 struct dsa_slave_priv *p;
1768 if (!ds->num_tx_queues)
1769 ds->num_tx_queues = 1;
1771 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
1772 NET_NAME_UNKNOWN, ether_setup,
1773 ds->num_tx_queues, 1);
1774 if (slave_dev == NULL)
1777 slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
1778 if (ds->ops->port_vlan_add && ds->ops->port_vlan_del)
1779 slave_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1780 slave_dev->hw_features |= NETIF_F_HW_TC;
1781 slave_dev->features |= NETIF_F_LLTX;
1782 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1783 if (!IS_ERR_OR_NULL(port->mac))
1784 ether_addr_copy(slave_dev->dev_addr, port->mac);
1786 eth_hw_addr_inherit(slave_dev, master);
1787 slave_dev->priv_flags |= IFF_NO_QUEUE;
1788 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1789 if (ds->ops->port_max_mtu)
1790 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index);
1791 if (cpu_dp->tag_ops->tail_tag)
1792 slave_dev->needed_tailroom = cpu_dp->tag_ops->overhead;
1794 slave_dev->needed_headroom = cpu_dp->tag_ops->overhead;
1795 /* Try to save one extra realloc later in the TX path (in the master)
1796 * by also inheriting the master's needed headroom and tailroom.
1797 * The 8021q driver also does this.
1799 slave_dev->needed_headroom += master->needed_headroom;
1800 slave_dev->needed_tailroom += master->needed_tailroom;
1801 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1803 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1806 SET_NETDEV_DEV(slave_dev, port->ds->dev);
1807 slave_dev->dev.of_node = port->dn;
1808 slave_dev->vlan_features = master->vlan_features;
1810 p = netdev_priv(slave_dev);
1811 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1812 if (!slave_dev->tstats) {
1813 free_netdev(slave_dev);
1817 ret = gro_cells_init(&p->gcells, slave_dev);
1822 INIT_LIST_HEAD(&p->mall_tc_list);
1823 p->xmit = cpu_dp->tag_ops->xmit;
1824 port->slave = slave_dev;
1827 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN);
1829 if (ret && ret != -EOPNOTSUPP)
1830 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n",
1831 ret, ETH_DATA_LEN, port->index);
1833 netif_carrier_off(slave_dev);
1835 ret = dsa_slave_phy_setup(slave_dev);
1837 netdev_err(slave_dev,
1838 "error %d setting up PHY for tree %d, switch %d, port %d\n",
1839 ret, ds->dst->index, ds->index, port->index);
1845 ret = register_netdevice(slave_dev);
1847 netdev_err(master, "error %d registering interface %s\n",
1848 ret, slave_dev->name);
1853 ret = netdev_upper_dev_link(master, slave_dev, NULL);
1858 goto out_unregister;
1863 unregister_netdev(slave_dev);
1866 phylink_disconnect_phy(p->dp->pl);
1868 phylink_destroy(p->dp->pl);
1870 gro_cells_destroy(&p->gcells);
1872 free_percpu(slave_dev->tstats);
1873 free_netdev(slave_dev);
1878 void dsa_slave_destroy(struct net_device *slave_dev)
1880 struct net_device *master = dsa_slave_to_master(slave_dev);
1881 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1882 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1884 netif_carrier_off(slave_dev);
1886 netdev_upper_dev_unlink(master, slave_dev);
1887 unregister_netdevice(slave_dev);
1888 phylink_disconnect_phy(dp->pl);
1891 phylink_destroy(dp->pl);
1892 gro_cells_destroy(&p->gcells);
1893 free_percpu(slave_dev->tstats);
1894 free_netdev(slave_dev);
1897 bool dsa_slave_dev_check(const struct net_device *dev)
1899 return dev->netdev_ops == &dsa_slave_netdev_ops;
1901 EXPORT_SYMBOL_GPL(dsa_slave_dev_check);
1903 static int dsa_slave_changeupper(struct net_device *dev,
1904 struct netdev_notifier_changeupper_info *info)
1906 struct dsa_port *dp = dsa_slave_to_port(dev);
1907 int err = NOTIFY_DONE;
1909 if (netif_is_bridge_master(info->upper_dev)) {
1910 if (info->linking) {
1911 err = dsa_port_bridge_join(dp, info->upper_dev);
1913 dsa_bridge_mtu_normalization(dp);
1914 err = notifier_from_errno(err);
1916 dsa_port_bridge_leave(dp, info->upper_dev);
1925 dsa_prevent_bridging_8021q_upper(struct net_device *dev,
1926 struct netdev_notifier_changeupper_info *info)
1928 struct netlink_ext_ack *ext_ack;
1929 struct net_device *slave;
1930 struct dsa_port *dp;
1932 ext_ack = netdev_notifier_info_to_extack(&info->info);
1934 if (!is_vlan_dev(dev))
1937 slave = vlan_dev_real_dev(dev);
1938 if (!dsa_slave_dev_check(slave))
1941 dp = dsa_slave_to_port(slave);
1942 if (!dp->bridge_dev)
1945 /* Deny enslaving a VLAN device into a VLAN-aware bridge */
1946 if (br_vlan_enabled(dp->bridge_dev) &&
1947 netif_is_bridge_master(info->upper_dev) && info->linking) {
1948 NL_SET_ERR_MSG_MOD(ext_ack,
1949 "Cannot enslave VLAN device into VLAN aware bridge");
1950 return notifier_from_errno(-EINVAL);
1957 dsa_slave_check_8021q_upper(struct net_device *dev,
1958 struct netdev_notifier_changeupper_info *info)
1960 struct dsa_port *dp = dsa_slave_to_port(dev);
1961 struct net_device *br = dp->bridge_dev;
1962 struct bridge_vlan_info br_info;
1963 struct netlink_ext_ack *extack;
1964 int err = NOTIFY_DONE;
1967 if (!br || !br_vlan_enabled(br))
1970 extack = netdev_notifier_info_to_extack(&info->info);
1971 vid = vlan_dev_vlan_id(info->upper_dev);
1973 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
1974 * device, respectively the VID is not found, returning
1975 * 0 means success, which is a failure for us here.
1977 err = br_vlan_get_info(br, vid, &br_info);
1979 NL_SET_ERR_MSG_MOD(extack,
1980 "This VLAN is already configured by the bridge");
1981 return notifier_from_errno(-EBUSY);
1987 static int dsa_slave_netdevice_event(struct notifier_block *nb,
1988 unsigned long event, void *ptr)
1990 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1993 case NETDEV_PRECHANGEUPPER: {
1994 struct netdev_notifier_changeupper_info *info = ptr;
1995 struct dsa_switch *ds;
1996 struct dsa_port *dp;
1999 if (!dsa_slave_dev_check(dev))
2000 return dsa_prevent_bridging_8021q_upper(dev, ptr);
2002 dp = dsa_slave_to_port(dev);
2005 if (ds->ops->port_prechangeupper) {
2006 err = ds->ops->port_prechangeupper(ds, dp->index, info);
2008 return notifier_from_errno(err);
2011 if (is_vlan_dev(info->upper_dev))
2012 return dsa_slave_check_8021q_upper(dev, ptr);
2015 case NETDEV_CHANGEUPPER:
2016 if (!dsa_slave_dev_check(dev))
2019 return dsa_slave_changeupper(dev, ptr);
2026 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work)
2028 struct dsa_switch *ds = switchdev_work->ds;
2029 struct switchdev_notifier_fdb_info info;
2030 struct dsa_port *dp;
2032 if (!dsa_is_user_port(ds, switchdev_work->port))
2035 info.addr = switchdev_work->addr;
2036 info.vid = switchdev_work->vid;
2037 info.offloaded = true;
2038 dp = dsa_to_port(ds, switchdev_work->port);
2039 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
2040 dp->slave, &info.info, NULL);
2043 static void dsa_slave_switchdev_event_work(struct work_struct *work)
2045 struct dsa_switchdev_event_work *switchdev_work =
2046 container_of(work, struct dsa_switchdev_event_work, work);
2047 struct dsa_switch *ds = switchdev_work->ds;
2048 struct dsa_port *dp;
2051 dp = dsa_to_port(ds, switchdev_work->port);
2054 switch (switchdev_work->event) {
2055 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2056 err = dsa_port_fdb_add(dp, switchdev_work->addr,
2057 switchdev_work->vid);
2060 "port %d failed to add %pM vid %d to fdb: %d\n",
2061 dp->index, switchdev_work->addr,
2062 switchdev_work->vid, err);
2065 dsa_fdb_offload_notify(switchdev_work);
2068 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2069 err = dsa_port_fdb_del(dp, switchdev_work->addr,
2070 switchdev_work->vid);
2073 "port %d failed to delete %pM vid %d from fdb: %d\n",
2074 dp->index, switchdev_work->addr,
2075 switchdev_work->vid, err);
2082 kfree(switchdev_work);
2083 if (dsa_is_user_port(ds, dp->index))
2087 static int dsa_lower_dev_walk(struct net_device *lower_dev,
2088 struct netdev_nested_priv *priv)
2090 if (dsa_slave_dev_check(lower_dev)) {
2091 priv->data = (void *)netdev_priv(lower_dev);
2098 static struct dsa_slave_priv *dsa_slave_dev_lower_find(struct net_device *dev)
2100 struct netdev_nested_priv priv = {
2104 netdev_walk_all_lower_dev_rcu(dev, dsa_lower_dev_walk, &priv);
2106 return (struct dsa_slave_priv *)priv.data;
2109 /* Called under rcu_read_lock() */
2110 static int dsa_slave_switchdev_event(struct notifier_block *unused,
2111 unsigned long event, void *ptr)
2113 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2114 const struct switchdev_notifier_fdb_info *fdb_info;
2115 struct dsa_switchdev_event_work *switchdev_work;
2116 struct dsa_port *dp;
2120 case SWITCHDEV_PORT_ATTR_SET:
2121 err = switchdev_handle_port_attr_set(dev, ptr,
2122 dsa_slave_dev_check,
2123 dsa_slave_port_attr_set);
2124 return notifier_from_errno(err);
2125 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2126 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2129 if (dsa_slave_dev_check(dev)) {
2130 if (!fdb_info->added_by_user)
2133 dp = dsa_slave_to_port(dev);
2135 /* Snoop addresses learnt on foreign interfaces
2136 * bridged with us, for switches that don't
2137 * automatically learn SA from CPU-injected traffic
2139 struct net_device *br_dev;
2140 struct dsa_slave_priv *p;
2142 br_dev = netdev_master_upper_dev_get_rcu(dev);
2146 if (!netif_is_bridge_master(br_dev))
2149 p = dsa_slave_dev_lower_find(br_dev);
2155 if (!dp->ds->assisted_learning_on_cpu_port)
2159 if (!dp->ds->ops->port_fdb_add || !dp->ds->ops->port_fdb_del)
2162 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2163 if (!switchdev_work)
2166 INIT_WORK(&switchdev_work->work,
2167 dsa_slave_switchdev_event_work);
2168 switchdev_work->ds = dp->ds;
2169 switchdev_work->port = dp->index;
2170 switchdev_work->event = event;
2172 ether_addr_copy(switchdev_work->addr,
2174 switchdev_work->vid = fdb_info->vid;
2176 /* Hold a reference on the slave for dsa_fdb_offload_notify */
2177 if (dsa_is_user_port(dp->ds, dp->index))
2179 dsa_schedule_work(&switchdev_work->work);
2188 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
2189 unsigned long event, void *ptr)
2191 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2195 case SWITCHDEV_PORT_OBJ_ADD:
2196 err = switchdev_handle_port_obj_add(dev, ptr,
2197 dsa_slave_dev_check,
2198 dsa_slave_port_obj_add);
2199 return notifier_from_errno(err);
2200 case SWITCHDEV_PORT_OBJ_DEL:
2201 err = switchdev_handle_port_obj_del(dev, ptr,
2202 dsa_slave_dev_check,
2203 dsa_slave_port_obj_del);
2204 return notifier_from_errno(err);
2205 case SWITCHDEV_PORT_ATTR_SET:
2206 err = switchdev_handle_port_attr_set(dev, ptr,
2207 dsa_slave_dev_check,
2208 dsa_slave_port_attr_set);
2209 return notifier_from_errno(err);
2215 static struct notifier_block dsa_slave_nb __read_mostly = {
2216 .notifier_call = dsa_slave_netdevice_event,
2219 static struct notifier_block dsa_slave_switchdev_notifier = {
2220 .notifier_call = dsa_slave_switchdev_event,
2223 static struct notifier_block dsa_slave_switchdev_blocking_notifier = {
2224 .notifier_call = dsa_slave_switchdev_blocking_event,
2227 int dsa_slave_register_notifier(void)
2229 struct notifier_block *nb;
2232 err = register_netdevice_notifier(&dsa_slave_nb);
2236 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
2238 goto err_switchdev_nb;
2240 nb = &dsa_slave_switchdev_blocking_notifier;
2241 err = register_switchdev_blocking_notifier(nb);
2243 goto err_switchdev_blocking_nb;
2247 err_switchdev_blocking_nb:
2248 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2250 unregister_netdevice_notifier(&dsa_slave_nb);
2254 void dsa_slave_unregister_notifier(void)
2256 struct notifier_block *nb;
2259 nb = &dsa_slave_switchdev_blocking_notifier;
2260 err = unregister_switchdev_blocking_notifier(nb);
2262 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
2264 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2266 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
2268 err = unregister_netdevice_notifier(&dsa_slave_nb);
2270 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);