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_begin && vid <= vlan->vid_end)
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 for (vid = vlan.vid_begin; vid <= vlan.vid_end; vid++) {
371 err = vlan_vid_add(master, htons(ETH_P_8021Q), vid);
379 static int dsa_slave_port_obj_add(struct net_device *dev,
380 const struct switchdev_obj *obj,
381 struct switchdev_trans *trans,
382 struct netlink_ext_ack *extack)
384 struct dsa_port *dp = dsa_slave_to_port(dev);
387 /* For the prepare phase, ensure the full set of changes is feasable in
388 * one go in order to signal a failure properly. If an operation is not
389 * supported, return -EOPNOTSUPP.
393 case SWITCHDEV_OBJ_ID_PORT_MDB:
394 if (obj->orig_dev != dev)
396 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans);
398 case SWITCHDEV_OBJ_ID_HOST_MDB:
399 /* DSA can directly translate this to a normal MDB add,
400 * but on the CPU port.
402 err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj),
405 case SWITCHDEV_OBJ_ID_PORT_VLAN:
406 err = dsa_slave_vlan_add(dev, obj, trans);
416 static int dsa_slave_vlan_del(struct net_device *dev,
417 const struct switchdev_obj *obj)
419 struct net_device *master = dsa_slave_to_master(dev);
420 struct dsa_port *dp = dsa_slave_to_port(dev);
421 struct switchdev_obj_port_vlan *vlan;
424 if (obj->orig_dev != dev)
427 if (dsa_port_skip_vlan_configuration(dp))
430 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
432 /* Do not deprogram the CPU port as it may be shared with other user
433 * ports which can be members of this VLAN as well.
435 err = dsa_port_vlan_del(dp, vlan);
439 for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++)
440 vlan_vid_del(master, htons(ETH_P_8021Q), vid);
445 static int dsa_slave_port_obj_del(struct net_device *dev,
446 const struct switchdev_obj *obj)
448 struct dsa_port *dp = dsa_slave_to_port(dev);
452 case SWITCHDEV_OBJ_ID_PORT_MDB:
453 if (obj->orig_dev != dev)
455 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
457 case SWITCHDEV_OBJ_ID_HOST_MDB:
458 /* DSA can directly translate this to a normal MDB add,
459 * but on the CPU port.
461 err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj));
463 case SWITCHDEV_OBJ_ID_PORT_VLAN:
464 err = dsa_slave_vlan_del(dev, obj);
474 static int dsa_slave_get_port_parent_id(struct net_device *dev,
475 struct netdev_phys_item_id *ppid)
477 struct dsa_port *dp = dsa_slave_to_port(dev);
478 struct dsa_switch *ds = dp->ds;
479 struct dsa_switch_tree *dst = ds->dst;
481 /* For non-legacy ports, devlink is used and it takes
482 * care of the name generation. This ndo implementation
483 * should be removed with legacy support.
488 ppid->id_len = sizeof(dst->index);
489 memcpy(&ppid->id, &dst->index, ppid->id_len);
494 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
497 #ifdef CONFIG_NET_POLL_CONTROLLER
498 struct dsa_slave_priv *p = netdev_priv(dev);
500 return netpoll_send_skb(p->netpoll, skb);
507 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
510 struct dsa_switch *ds = p->dp->ds;
511 struct sk_buff *clone;
514 type = ptp_classify_raw(skb);
515 if (type == PTP_CLASS_NONE)
518 if (!ds->ops->port_txtstamp)
521 clone = skb_clone_sk(skb);
525 if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type)) {
526 DSA_SKB_CB(skb)->clone = clone;
533 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
535 /* SKB for netpoll still need to be mangled with the protocol-specific
536 * tag to be successfully transmitted
538 if (unlikely(netpoll_tx_running(dev)))
539 return dsa_slave_netpoll_send_skb(dev, skb);
541 /* Queue the SKB for transmission on the parent interface, but
542 * do not modify its EtherType
544 skb->dev = dsa_slave_to_master(dev);
549 EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
551 static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev)
553 int needed_headroom = dev->needed_headroom;
554 int needed_tailroom = dev->needed_tailroom;
556 /* For tail taggers, we need to pad short frames ourselves, to ensure
557 * that the tail tag does not fail at its role of being at the end of
558 * the packet, once the master interface pads the frame. Account for
559 * that pad length here, and pad later.
561 if (unlikely(needed_tailroom && skb->len < ETH_ZLEN))
562 needed_tailroom += ETH_ZLEN - skb->len;
563 /* skb_headroom() returns unsigned int... */
564 needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0);
565 needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0);
567 if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb)))
568 /* No reallocation needed, yay! */
571 return pskb_expand_head(skb, needed_headroom, needed_tailroom,
575 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
577 struct dsa_slave_priv *p = netdev_priv(dev);
578 struct sk_buff *nskb;
580 dev_sw_netstats_tx_add(dev, 1, skb->len);
582 DSA_SKB_CB(skb)->clone = NULL;
584 /* Identify PTP protocol packets, clone them, and pass them to the
587 dsa_skb_tx_timestamp(p, skb);
589 if (dsa_realloc_skb(skb, dev)) {
590 dev_kfree_skb_any(skb);
594 /* needed_tailroom should still be 'warm' in the cache line from
595 * dsa_realloc_skb(), which has also ensured that padding is safe.
597 if (dev->needed_tailroom)
600 /* Transmit function may have to reallocate the original SKB,
601 * in which case it must have freed it. Only free it here on error.
603 nskb = p->xmit(skb, dev);
609 return dsa_enqueue_skb(nskb, dev);
612 /* ethtool operations *******************************************************/
614 static void dsa_slave_get_drvinfo(struct net_device *dev,
615 struct ethtool_drvinfo *drvinfo)
617 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
618 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
619 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
622 static int dsa_slave_get_regs_len(struct net_device *dev)
624 struct dsa_port *dp = dsa_slave_to_port(dev);
625 struct dsa_switch *ds = dp->ds;
627 if (ds->ops->get_regs_len)
628 return ds->ops->get_regs_len(ds, dp->index);
634 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
636 struct dsa_port *dp = dsa_slave_to_port(dev);
637 struct dsa_switch *ds = dp->ds;
639 if (ds->ops->get_regs)
640 ds->ops->get_regs(ds, dp->index, regs, _p);
643 static int dsa_slave_nway_reset(struct net_device *dev)
645 struct dsa_port *dp = dsa_slave_to_port(dev);
647 return phylink_ethtool_nway_reset(dp->pl);
650 static int dsa_slave_get_eeprom_len(struct net_device *dev)
652 struct dsa_port *dp = dsa_slave_to_port(dev);
653 struct dsa_switch *ds = dp->ds;
655 if (ds->cd && ds->cd->eeprom_len)
656 return ds->cd->eeprom_len;
658 if (ds->ops->get_eeprom_len)
659 return ds->ops->get_eeprom_len(ds);
664 static int dsa_slave_get_eeprom(struct net_device *dev,
665 struct ethtool_eeprom *eeprom, u8 *data)
667 struct dsa_port *dp = dsa_slave_to_port(dev);
668 struct dsa_switch *ds = dp->ds;
670 if (ds->ops->get_eeprom)
671 return ds->ops->get_eeprom(ds, eeprom, data);
676 static int dsa_slave_set_eeprom(struct net_device *dev,
677 struct ethtool_eeprom *eeprom, u8 *data)
679 struct dsa_port *dp = dsa_slave_to_port(dev);
680 struct dsa_switch *ds = dp->ds;
682 if (ds->ops->set_eeprom)
683 return ds->ops->set_eeprom(ds, eeprom, data);
688 static void dsa_slave_get_strings(struct net_device *dev,
689 uint32_t stringset, uint8_t *data)
691 struct dsa_port *dp = dsa_slave_to_port(dev);
692 struct dsa_switch *ds = dp->ds;
694 if (stringset == ETH_SS_STATS) {
695 int len = ETH_GSTRING_LEN;
697 strncpy(data, "tx_packets", len);
698 strncpy(data + len, "tx_bytes", len);
699 strncpy(data + 2 * len, "rx_packets", len);
700 strncpy(data + 3 * len, "rx_bytes", len);
701 if (ds->ops->get_strings)
702 ds->ops->get_strings(ds, dp->index, stringset,
707 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
708 struct ethtool_stats *stats,
711 struct dsa_port *dp = dsa_slave_to_port(dev);
712 struct dsa_switch *ds = dp->ds;
713 struct pcpu_sw_netstats *s;
717 for_each_possible_cpu(i) {
718 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
720 s = per_cpu_ptr(dev->tstats, i);
722 start = u64_stats_fetch_begin_irq(&s->syncp);
723 tx_packets = s->tx_packets;
724 tx_bytes = s->tx_bytes;
725 rx_packets = s->rx_packets;
726 rx_bytes = s->rx_bytes;
727 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
728 data[0] += tx_packets;
730 data[2] += rx_packets;
733 if (ds->ops->get_ethtool_stats)
734 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
737 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
739 struct dsa_port *dp = dsa_slave_to_port(dev);
740 struct dsa_switch *ds = dp->ds;
742 if (sset == ETH_SS_STATS) {
746 if (ds->ops->get_sset_count)
747 count += ds->ops->get_sset_count(ds, dp->index, sset);
755 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
757 struct dsa_port *dp = dsa_slave_to_port(dev);
758 struct dsa_switch *ds = dp->ds;
760 phylink_ethtool_get_wol(dp->pl, w);
762 if (ds->ops->get_wol)
763 ds->ops->get_wol(ds, dp->index, w);
766 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
768 struct dsa_port *dp = dsa_slave_to_port(dev);
769 struct dsa_switch *ds = dp->ds;
770 int ret = -EOPNOTSUPP;
772 phylink_ethtool_set_wol(dp->pl, w);
774 if (ds->ops->set_wol)
775 ret = ds->ops->set_wol(ds, dp->index, w);
780 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
782 struct dsa_port *dp = dsa_slave_to_port(dev);
783 struct dsa_switch *ds = dp->ds;
786 /* Port's PHY and MAC both need to be EEE capable */
787 if (!dev->phydev || !dp->pl)
790 if (!ds->ops->set_mac_eee)
793 ret = ds->ops->set_mac_eee(ds, dp->index, e);
797 return phylink_ethtool_set_eee(dp->pl, e);
800 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
802 struct dsa_port *dp = dsa_slave_to_port(dev);
803 struct dsa_switch *ds = dp->ds;
806 /* Port's PHY and MAC both need to be EEE capable */
807 if (!dev->phydev || !dp->pl)
810 if (!ds->ops->get_mac_eee)
813 ret = ds->ops->get_mac_eee(ds, dp->index, e);
817 return phylink_ethtool_get_eee(dp->pl, e);
820 static int dsa_slave_get_link_ksettings(struct net_device *dev,
821 struct ethtool_link_ksettings *cmd)
823 struct dsa_port *dp = dsa_slave_to_port(dev);
825 return phylink_ethtool_ksettings_get(dp->pl, cmd);
828 static int dsa_slave_set_link_ksettings(struct net_device *dev,
829 const struct ethtool_link_ksettings *cmd)
831 struct dsa_port *dp = dsa_slave_to_port(dev);
833 return phylink_ethtool_ksettings_set(dp->pl, cmd);
836 static void dsa_slave_get_pauseparam(struct net_device *dev,
837 struct ethtool_pauseparam *pause)
839 struct dsa_port *dp = dsa_slave_to_port(dev);
841 phylink_ethtool_get_pauseparam(dp->pl, pause);
844 static int dsa_slave_set_pauseparam(struct net_device *dev,
845 struct ethtool_pauseparam *pause)
847 struct dsa_port *dp = dsa_slave_to_port(dev);
849 return phylink_ethtool_set_pauseparam(dp->pl, pause);
852 #ifdef CONFIG_NET_POLL_CONTROLLER
853 static int dsa_slave_netpoll_setup(struct net_device *dev,
854 struct netpoll_info *ni)
856 struct net_device *master = dsa_slave_to_master(dev);
857 struct dsa_slave_priv *p = netdev_priv(dev);
858 struct netpoll *netpoll;
861 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
865 err = __netpoll_setup(netpoll, master);
871 p->netpoll = netpoll;
876 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
878 struct dsa_slave_priv *p = netdev_priv(dev);
879 struct netpoll *netpoll = p->netpoll;
886 __netpoll_free(netpoll);
889 static void dsa_slave_poll_controller(struct net_device *dev)
894 static int dsa_slave_get_phys_port_name(struct net_device *dev,
895 char *name, size_t len)
897 struct dsa_port *dp = dsa_slave_to_port(dev);
899 /* For non-legacy ports, devlink is used and it takes
900 * care of the name generation. This ndo implementation
901 * should be removed with legacy support.
906 if (snprintf(name, len, "p%d", dp->index) >= len)
912 static struct dsa_mall_tc_entry *
913 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
915 struct dsa_slave_priv *p = netdev_priv(dev);
916 struct dsa_mall_tc_entry *mall_tc_entry;
918 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
919 if (mall_tc_entry->cookie == cookie)
920 return mall_tc_entry;
926 dsa_slave_add_cls_matchall_mirred(struct net_device *dev,
927 struct tc_cls_matchall_offload *cls,
930 struct dsa_port *dp = dsa_slave_to_port(dev);
931 struct dsa_slave_priv *p = netdev_priv(dev);
932 struct dsa_mall_mirror_tc_entry *mirror;
933 struct dsa_mall_tc_entry *mall_tc_entry;
934 struct dsa_switch *ds = dp->ds;
935 struct flow_action_entry *act;
936 struct dsa_port *to_dp;
939 if (!ds->ops->port_mirror_add)
942 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
946 act = &cls->rule->action.entries[0];
951 if (!dsa_slave_dev_check(act->dev))
954 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
958 mall_tc_entry->cookie = cls->cookie;
959 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
960 mirror = &mall_tc_entry->mirror;
962 to_dp = dsa_slave_to_port(act->dev);
964 mirror->to_local_port = to_dp->index;
965 mirror->ingress = ingress;
967 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
969 kfree(mall_tc_entry);
973 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
979 dsa_slave_add_cls_matchall_police(struct net_device *dev,
980 struct tc_cls_matchall_offload *cls,
983 struct netlink_ext_ack *extack = cls->common.extack;
984 struct dsa_port *dp = dsa_slave_to_port(dev);
985 struct dsa_slave_priv *p = netdev_priv(dev);
986 struct dsa_mall_policer_tc_entry *policer;
987 struct dsa_mall_tc_entry *mall_tc_entry;
988 struct dsa_switch *ds = dp->ds;
989 struct flow_action_entry *act;
992 if (!ds->ops->port_policer_add) {
993 NL_SET_ERR_MSG_MOD(extack,
994 "Policing offload not implemented");
999 NL_SET_ERR_MSG_MOD(extack,
1000 "Only supported on ingress qdisc");
1004 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
1005 cls->common.extack))
1008 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) {
1009 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) {
1010 NL_SET_ERR_MSG_MOD(extack,
1011 "Only one port policer allowed");
1016 act = &cls->rule->action.entries[0];
1018 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1022 mall_tc_entry->cookie = cls->cookie;
1023 mall_tc_entry->type = DSA_PORT_MALL_POLICER;
1024 policer = &mall_tc_entry->policer;
1025 policer->rate_bytes_per_sec = act->police.rate_bytes_ps;
1026 policer->burst = act->police.burst;
1028 err = ds->ops->port_policer_add(ds, dp->index, policer);
1030 kfree(mall_tc_entry);
1034 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
1039 static int dsa_slave_add_cls_matchall(struct net_device *dev,
1040 struct tc_cls_matchall_offload *cls,
1043 int err = -EOPNOTSUPP;
1045 if (cls->common.protocol == htons(ETH_P_ALL) &&
1046 flow_offload_has_one_action(&cls->rule->action) &&
1047 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED)
1048 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress);
1049 else if (flow_offload_has_one_action(&cls->rule->action) &&
1050 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE)
1051 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress);
1056 static void dsa_slave_del_cls_matchall(struct net_device *dev,
1057 struct tc_cls_matchall_offload *cls)
1059 struct dsa_port *dp = dsa_slave_to_port(dev);
1060 struct dsa_mall_tc_entry *mall_tc_entry;
1061 struct dsa_switch *ds = dp->ds;
1063 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
1067 list_del(&mall_tc_entry->list);
1069 switch (mall_tc_entry->type) {
1070 case DSA_PORT_MALL_MIRROR:
1071 if (ds->ops->port_mirror_del)
1072 ds->ops->port_mirror_del(ds, dp->index,
1073 &mall_tc_entry->mirror);
1075 case DSA_PORT_MALL_POLICER:
1076 if (ds->ops->port_policer_del)
1077 ds->ops->port_policer_del(ds, dp->index);
1083 kfree(mall_tc_entry);
1086 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
1087 struct tc_cls_matchall_offload *cls,
1090 if (cls->common.chain_index)
1093 switch (cls->command) {
1094 case TC_CLSMATCHALL_REPLACE:
1095 return dsa_slave_add_cls_matchall(dev, cls, ingress);
1096 case TC_CLSMATCHALL_DESTROY:
1097 dsa_slave_del_cls_matchall(dev, cls);
1104 static int dsa_slave_add_cls_flower(struct net_device *dev,
1105 struct flow_cls_offload *cls,
1108 struct dsa_port *dp = dsa_slave_to_port(dev);
1109 struct dsa_switch *ds = dp->ds;
1110 int port = dp->index;
1112 if (!ds->ops->cls_flower_add)
1115 return ds->ops->cls_flower_add(ds, port, cls, ingress);
1118 static int dsa_slave_del_cls_flower(struct net_device *dev,
1119 struct flow_cls_offload *cls,
1122 struct dsa_port *dp = dsa_slave_to_port(dev);
1123 struct dsa_switch *ds = dp->ds;
1124 int port = dp->index;
1126 if (!ds->ops->cls_flower_del)
1129 return ds->ops->cls_flower_del(ds, port, cls, ingress);
1132 static int dsa_slave_stats_cls_flower(struct net_device *dev,
1133 struct flow_cls_offload *cls,
1136 struct dsa_port *dp = dsa_slave_to_port(dev);
1137 struct dsa_switch *ds = dp->ds;
1138 int port = dp->index;
1140 if (!ds->ops->cls_flower_stats)
1143 return ds->ops->cls_flower_stats(ds, port, cls, ingress);
1146 static int dsa_slave_setup_tc_cls_flower(struct net_device *dev,
1147 struct flow_cls_offload *cls,
1150 switch (cls->command) {
1151 case FLOW_CLS_REPLACE:
1152 return dsa_slave_add_cls_flower(dev, cls, ingress);
1153 case FLOW_CLS_DESTROY:
1154 return dsa_slave_del_cls_flower(dev, cls, ingress);
1155 case FLOW_CLS_STATS:
1156 return dsa_slave_stats_cls_flower(dev, cls, ingress);
1162 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
1163 void *cb_priv, bool ingress)
1165 struct net_device *dev = cb_priv;
1167 if (!tc_can_offload(dev))
1171 case TC_SETUP_CLSMATCHALL:
1172 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
1173 case TC_SETUP_CLSFLOWER:
1174 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress);
1180 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
1181 void *type_data, void *cb_priv)
1183 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
1186 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
1187 void *type_data, void *cb_priv)
1189 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
1192 static LIST_HEAD(dsa_slave_block_cb_list);
1194 static int dsa_slave_setup_tc_block(struct net_device *dev,
1195 struct flow_block_offload *f)
1197 struct flow_block_cb *block_cb;
1198 flow_setup_cb_t *cb;
1200 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
1201 cb = dsa_slave_setup_tc_block_cb_ig;
1202 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
1203 cb = dsa_slave_setup_tc_block_cb_eg;
1207 f->driver_block_list = &dsa_slave_block_cb_list;
1209 switch (f->command) {
1210 case FLOW_BLOCK_BIND:
1211 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list))
1214 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL);
1215 if (IS_ERR(block_cb))
1216 return PTR_ERR(block_cb);
1218 flow_block_cb_add(block_cb, f);
1219 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list);
1221 case FLOW_BLOCK_UNBIND:
1222 block_cb = flow_block_cb_lookup(f->block, cb, dev);
1226 flow_block_cb_remove(block_cb, f);
1227 list_del(&block_cb->driver_list);
1234 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
1237 struct dsa_port *dp = dsa_slave_to_port(dev);
1238 struct dsa_switch *ds = dp->ds;
1240 if (type == TC_SETUP_BLOCK)
1241 return dsa_slave_setup_tc_block(dev, type_data);
1243 if (!ds->ops->port_setup_tc)
1246 return ds->ops->port_setup_tc(ds, dp->index, type, type_data);
1249 static int dsa_slave_get_rxnfc(struct net_device *dev,
1250 struct ethtool_rxnfc *nfc, u32 *rule_locs)
1252 struct dsa_port *dp = dsa_slave_to_port(dev);
1253 struct dsa_switch *ds = dp->ds;
1255 if (!ds->ops->get_rxnfc)
1258 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
1261 static int dsa_slave_set_rxnfc(struct net_device *dev,
1262 struct ethtool_rxnfc *nfc)
1264 struct dsa_port *dp = dsa_slave_to_port(dev);
1265 struct dsa_switch *ds = dp->ds;
1267 if (!ds->ops->set_rxnfc)
1270 return ds->ops->set_rxnfc(ds, dp->index, nfc);
1273 static int dsa_slave_get_ts_info(struct net_device *dev,
1274 struct ethtool_ts_info *ts)
1276 struct dsa_slave_priv *p = netdev_priv(dev);
1277 struct dsa_switch *ds = p->dp->ds;
1279 if (!ds->ops->get_ts_info)
1282 return ds->ops->get_ts_info(ds, p->dp->index, ts);
1285 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
1288 struct net_device *master = dsa_slave_to_master(dev);
1289 struct dsa_port *dp = dsa_slave_to_port(dev);
1290 struct switchdev_obj_port_vlan vlan = {
1291 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
1294 /* This API only allows programming tagged, non-PVID VIDs */
1297 struct switchdev_trans trans;
1301 trans.ph_prepare = true;
1302 ret = dsa_port_vlan_add(dp, &vlan, &trans);
1306 trans.ph_prepare = false;
1307 ret = dsa_port_vlan_add(dp, &vlan, &trans);
1311 /* And CPU port... */
1312 trans.ph_prepare = true;
1313 ret = dsa_port_vlan_add(dp->cpu_dp, &vlan, &trans);
1317 trans.ph_prepare = false;
1318 ret = dsa_port_vlan_add(dp->cpu_dp, &vlan, &trans);
1322 return vlan_vid_add(master, proto, vid);
1325 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
1328 struct net_device *master = dsa_slave_to_master(dev);
1329 struct dsa_port *dp = dsa_slave_to_port(dev);
1330 struct switchdev_obj_port_vlan vlan = {
1333 /* This API only allows programming tagged, non-PVID VIDs */
1338 /* Do not deprogram the CPU port as it may be shared with other user
1339 * ports which can be members of this VLAN as well.
1341 err = dsa_port_vlan_del(dp, &vlan);
1345 vlan_vid_del(master, proto, vid);
1350 struct dsa_hw_port {
1351 struct list_head list;
1352 struct net_device *dev;
1356 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu)
1358 const struct dsa_hw_port *p;
1361 list_for_each_entry(p, hw_port_list, list) {
1362 if (p->dev->mtu == mtu)
1365 err = dev_set_mtu(p->dev, mtu);
1373 list_for_each_entry_continue_reverse(p, hw_port_list, list) {
1374 if (p->dev->mtu == p->old_mtu)
1377 if (dev_set_mtu(p->dev, p->old_mtu))
1378 netdev_err(p->dev, "Failed to restore MTU\n");
1384 static void dsa_hw_port_list_free(struct list_head *hw_port_list)
1386 struct dsa_hw_port *p, *n;
1388 list_for_each_entry_safe(p, n, hw_port_list, list)
1392 /* Make the hardware datapath to/from @dev limited to a common MTU */
1393 static void dsa_bridge_mtu_normalization(struct dsa_port *dp)
1395 struct list_head hw_port_list;
1396 struct dsa_switch_tree *dst;
1397 int min_mtu = ETH_MAX_MTU;
1398 struct dsa_port *other_dp;
1401 if (!dp->ds->mtu_enforcement_ingress)
1404 if (!dp->bridge_dev)
1407 INIT_LIST_HEAD(&hw_port_list);
1409 /* Populate the list of ports that are part of the same bridge
1410 * as the newly added/modified port
1412 list_for_each_entry(dst, &dsa_tree_list, list) {
1413 list_for_each_entry(other_dp, &dst->ports, list) {
1414 struct dsa_hw_port *hw_port;
1415 struct net_device *slave;
1417 if (other_dp->type != DSA_PORT_TYPE_USER)
1420 if (other_dp->bridge_dev != dp->bridge_dev)
1423 if (!other_dp->ds->mtu_enforcement_ingress)
1426 slave = other_dp->slave;
1428 if (min_mtu > slave->mtu)
1429 min_mtu = slave->mtu;
1431 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL);
1435 hw_port->dev = slave;
1436 hw_port->old_mtu = slave->mtu;
1438 list_add(&hw_port->list, &hw_port_list);
1442 /* Attempt to configure the entire hardware bridge to the newly added
1443 * interface's MTU first, regardless of whether the intention of the
1444 * user was to raise or lower it.
1446 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu);
1450 /* Clearly that didn't work out so well, so just set the minimum MTU on
1451 * all hardware bridge ports now. If this fails too, then all ports will
1452 * still have their old MTU rolled back anyway.
1454 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu);
1457 dsa_hw_port_list_free(&hw_port_list);
1460 static int dsa_slave_change_mtu(struct net_device *dev, int new_mtu)
1462 struct net_device *master = dsa_slave_to_master(dev);
1463 struct dsa_port *dp = dsa_slave_to_port(dev);
1464 struct dsa_slave_priv *p = netdev_priv(dev);
1465 struct dsa_switch *ds = p->dp->ds;
1466 struct dsa_port *cpu_dp;
1467 int port = p->dp->index;
1468 int largest_mtu = 0;
1475 if (!ds->ops->port_change_mtu)
1478 for (i = 0; i < ds->num_ports; i++) {
1481 if (!dsa_is_user_port(ds, i))
1484 /* During probe, this function will be called for each slave
1485 * device, while not all of them have been allocated. That's
1486 * ok, it doesn't change what the maximum is, so ignore it.
1488 if (!dsa_to_port(ds, i)->slave)
1491 /* Pretend that we already applied the setting, which we
1492 * actually haven't (still haven't done all integrity checks)
1495 slave_mtu = new_mtu;
1497 slave_mtu = dsa_to_port(ds, i)->slave->mtu;
1499 if (largest_mtu < slave_mtu)
1500 largest_mtu = slave_mtu;
1503 cpu_dp = dsa_to_port(ds, port)->cpu_dp;
1505 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu);
1506 old_master_mtu = master->mtu;
1507 new_master_mtu = largest_mtu + cpu_dp->tag_ops->overhead;
1508 if (new_master_mtu > mtu_limit)
1511 /* If the master MTU isn't over limit, there's no need to check the CPU
1512 * MTU, since that surely isn't either.
1514 cpu_mtu = largest_mtu;
1516 /* Start applying stuff */
1517 if (new_master_mtu != old_master_mtu) {
1518 err = dev_set_mtu(master, new_master_mtu);
1520 goto out_master_failed;
1522 /* We only need to propagate the MTU of the CPU port to
1523 * upstream switches.
1525 err = dsa_port_mtu_change(cpu_dp, cpu_mtu, true);
1527 goto out_cpu_failed;
1530 err = dsa_port_mtu_change(dp, new_mtu, false);
1532 goto out_port_failed;
1536 dsa_bridge_mtu_normalization(dp);
1541 if (new_master_mtu != old_master_mtu)
1542 dsa_port_mtu_change(cpu_dp, old_master_mtu -
1543 cpu_dp->tag_ops->overhead,
1546 if (new_master_mtu != old_master_mtu)
1547 dev_set_mtu(master, old_master_mtu);
1552 static const struct ethtool_ops dsa_slave_ethtool_ops = {
1553 .get_drvinfo = dsa_slave_get_drvinfo,
1554 .get_regs_len = dsa_slave_get_regs_len,
1555 .get_regs = dsa_slave_get_regs,
1556 .nway_reset = dsa_slave_nway_reset,
1557 .get_link = ethtool_op_get_link,
1558 .get_eeprom_len = dsa_slave_get_eeprom_len,
1559 .get_eeprom = dsa_slave_get_eeprom,
1560 .set_eeprom = dsa_slave_set_eeprom,
1561 .get_strings = dsa_slave_get_strings,
1562 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
1563 .get_sset_count = dsa_slave_get_sset_count,
1564 .set_wol = dsa_slave_set_wol,
1565 .get_wol = dsa_slave_get_wol,
1566 .set_eee = dsa_slave_set_eee,
1567 .get_eee = dsa_slave_get_eee,
1568 .get_link_ksettings = dsa_slave_get_link_ksettings,
1569 .set_link_ksettings = dsa_slave_set_link_ksettings,
1570 .get_pauseparam = dsa_slave_get_pauseparam,
1571 .set_pauseparam = dsa_slave_set_pauseparam,
1572 .get_rxnfc = dsa_slave_get_rxnfc,
1573 .set_rxnfc = dsa_slave_set_rxnfc,
1574 .get_ts_info = dsa_slave_get_ts_info,
1577 /* legacy way, bypassing the bridge *****************************************/
1578 int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
1579 struct net_device *dev,
1580 const unsigned char *addr, u16 vid,
1582 struct netlink_ext_ack *extack)
1584 struct dsa_port *dp = dsa_slave_to_port(dev);
1586 return dsa_port_fdb_add(dp, addr, vid);
1589 int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
1590 struct net_device *dev,
1591 const unsigned char *addr, u16 vid)
1593 struct dsa_port *dp = dsa_slave_to_port(dev);
1595 return dsa_port_fdb_del(dp, addr, vid);
1598 static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
1600 struct dsa_port *dp = dsa_slave_to_port(dev);
1602 return dp->ds->devlink ? &dp->devlink_port : NULL;
1605 static const struct net_device_ops dsa_slave_netdev_ops = {
1606 .ndo_open = dsa_slave_open,
1607 .ndo_stop = dsa_slave_close,
1608 .ndo_start_xmit = dsa_slave_xmit,
1609 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
1610 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
1611 .ndo_set_mac_address = dsa_slave_set_mac_address,
1612 .ndo_fdb_add = dsa_legacy_fdb_add,
1613 .ndo_fdb_del = dsa_legacy_fdb_del,
1614 .ndo_fdb_dump = dsa_slave_fdb_dump,
1615 .ndo_do_ioctl = dsa_slave_ioctl,
1616 .ndo_get_iflink = dsa_slave_get_iflink,
1617 #ifdef CONFIG_NET_POLL_CONTROLLER
1618 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
1619 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
1620 .ndo_poll_controller = dsa_slave_poll_controller,
1622 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
1623 .ndo_setup_tc = dsa_slave_setup_tc,
1624 .ndo_get_stats64 = dev_get_tstats64,
1625 .ndo_get_port_parent_id = dsa_slave_get_port_parent_id,
1626 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
1627 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
1628 .ndo_get_devlink_port = dsa_slave_get_devlink_port,
1629 .ndo_change_mtu = dsa_slave_change_mtu,
1632 static struct device_type dsa_type = {
1636 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
1638 const struct dsa_port *dp = dsa_to_port(ds, port);
1641 phylink_mac_change(dp->pl, up);
1643 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
1645 static void dsa_slave_phylink_fixed_state(struct phylink_config *config,
1646 struct phylink_link_state *state)
1648 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1649 struct dsa_switch *ds = dp->ds;
1651 /* No need to check that this operation is valid, the callback would
1652 * not be called if it was not.
1654 ds->ops->phylink_fixed_state(ds, dp->index, state);
1657 /* slave device setup *******************************************************/
1658 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
1660 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1661 struct dsa_switch *ds = dp->ds;
1663 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
1664 if (!slave_dev->phydev) {
1665 netdev_err(slave_dev, "no phy at %d\n", addr);
1669 return phylink_connect_phy(dp->pl, slave_dev->phydev);
1672 static int dsa_slave_phy_setup(struct net_device *slave_dev)
1674 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1675 struct device_node *port_dn = dp->dn;
1676 struct dsa_switch *ds = dp->ds;
1677 phy_interface_t mode;
1681 ret = of_get_phy_mode(port_dn, &mode);
1683 mode = PHY_INTERFACE_MODE_NA;
1685 dp->pl_config.dev = &slave_dev->dev;
1686 dp->pl_config.type = PHYLINK_NETDEV;
1688 /* The get_fixed_state callback takes precedence over polling the
1689 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set
1690 * this if the switch provides such a callback.
1692 if (ds->ops->phylink_fixed_state) {
1693 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state;
1694 dp->pl_config.poll_fixed_state = true;
1697 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode,
1698 &dsa_port_phylink_mac_ops);
1699 if (IS_ERR(dp->pl)) {
1700 netdev_err(slave_dev,
1701 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1702 return PTR_ERR(dp->pl);
1705 if (ds->ops->get_phy_flags)
1706 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
1708 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
1709 if (ret == -ENODEV && ds->slave_mii_bus) {
1710 /* We could not connect to a designated PHY or SFP, so try to
1711 * use the switch internal MDIO bus instead
1713 ret = dsa_slave_phy_connect(slave_dev, dp->index);
1715 netdev_err(slave_dev,
1716 "failed to connect to port %d: %d\n",
1718 phylink_destroy(dp->pl);
1726 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1727 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1728 struct netdev_queue *txq,
1731 lockdep_set_class(&txq->_xmit_lock,
1732 &dsa_slave_netdev_xmit_lock_key);
1735 int dsa_slave_suspend(struct net_device *slave_dev)
1737 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1739 if (!netif_running(slave_dev))
1742 netif_device_detach(slave_dev);
1745 phylink_stop(dp->pl);
1751 int dsa_slave_resume(struct net_device *slave_dev)
1753 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1755 if (!netif_running(slave_dev))
1758 netif_device_attach(slave_dev);
1761 phylink_start(dp->pl);
1767 int dsa_slave_create(struct dsa_port *port)
1769 const struct dsa_port *cpu_dp = port->cpu_dp;
1770 struct net_device *master = cpu_dp->master;
1771 struct dsa_switch *ds = port->ds;
1772 const char *name = port->name;
1773 struct net_device *slave_dev;
1774 struct dsa_slave_priv *p;
1777 if (!ds->num_tx_queues)
1778 ds->num_tx_queues = 1;
1780 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
1781 NET_NAME_UNKNOWN, ether_setup,
1782 ds->num_tx_queues, 1);
1783 if (slave_dev == NULL)
1786 slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
1787 if (ds->ops->port_vlan_add && ds->ops->port_vlan_del)
1788 slave_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1789 slave_dev->hw_features |= NETIF_F_HW_TC;
1790 slave_dev->features |= NETIF_F_LLTX;
1791 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1792 if (!IS_ERR_OR_NULL(port->mac))
1793 ether_addr_copy(slave_dev->dev_addr, port->mac);
1795 eth_hw_addr_inherit(slave_dev, master);
1796 slave_dev->priv_flags |= IFF_NO_QUEUE;
1797 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1798 if (ds->ops->port_max_mtu)
1799 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index);
1800 if (cpu_dp->tag_ops->tail_tag)
1801 slave_dev->needed_tailroom = cpu_dp->tag_ops->overhead;
1803 slave_dev->needed_headroom = cpu_dp->tag_ops->overhead;
1804 /* Try to save one extra realloc later in the TX path (in the master)
1805 * by also inheriting the master's needed headroom and tailroom.
1806 * The 8021q driver also does this.
1808 slave_dev->needed_headroom += master->needed_headroom;
1809 slave_dev->needed_tailroom += master->needed_tailroom;
1810 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1812 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1815 SET_NETDEV_DEV(slave_dev, port->ds->dev);
1816 slave_dev->dev.of_node = port->dn;
1817 slave_dev->vlan_features = master->vlan_features;
1819 p = netdev_priv(slave_dev);
1820 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1821 if (!slave_dev->tstats) {
1822 free_netdev(slave_dev);
1826 ret = gro_cells_init(&p->gcells, slave_dev);
1831 INIT_LIST_HEAD(&p->mall_tc_list);
1832 p->xmit = cpu_dp->tag_ops->xmit;
1833 port->slave = slave_dev;
1836 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN);
1838 if (ret && ret != -EOPNOTSUPP)
1839 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n",
1840 ret, ETH_DATA_LEN, port->index);
1842 netif_carrier_off(slave_dev);
1844 ret = dsa_slave_phy_setup(slave_dev);
1846 netdev_err(slave_dev,
1847 "error %d setting up PHY for tree %d, switch %d, port %d\n",
1848 ret, ds->dst->index, ds->index, port->index);
1854 ret = register_netdevice(slave_dev);
1856 netdev_err(master, "error %d registering interface %s\n",
1857 ret, slave_dev->name);
1862 ret = netdev_upper_dev_link(master, slave_dev, NULL);
1867 goto out_unregister;
1872 unregister_netdev(slave_dev);
1875 phylink_disconnect_phy(p->dp->pl);
1877 phylink_destroy(p->dp->pl);
1879 gro_cells_destroy(&p->gcells);
1881 free_percpu(slave_dev->tstats);
1882 free_netdev(slave_dev);
1887 void dsa_slave_destroy(struct net_device *slave_dev)
1889 struct net_device *master = dsa_slave_to_master(slave_dev);
1890 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1891 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1893 netif_carrier_off(slave_dev);
1895 netdev_upper_dev_unlink(master, slave_dev);
1896 unregister_netdevice(slave_dev);
1897 phylink_disconnect_phy(dp->pl);
1900 phylink_destroy(dp->pl);
1901 gro_cells_destroy(&p->gcells);
1902 free_percpu(slave_dev->tstats);
1903 free_netdev(slave_dev);
1906 bool dsa_slave_dev_check(const struct net_device *dev)
1908 return dev->netdev_ops == &dsa_slave_netdev_ops;
1910 EXPORT_SYMBOL_GPL(dsa_slave_dev_check);
1912 static int dsa_slave_changeupper(struct net_device *dev,
1913 struct netdev_notifier_changeupper_info *info)
1915 struct dsa_port *dp = dsa_slave_to_port(dev);
1916 int err = NOTIFY_DONE;
1918 if (netif_is_bridge_master(info->upper_dev)) {
1919 if (info->linking) {
1920 err = dsa_port_bridge_join(dp, info->upper_dev);
1922 dsa_bridge_mtu_normalization(dp);
1923 err = notifier_from_errno(err);
1925 dsa_port_bridge_leave(dp, info->upper_dev);
1934 dsa_prevent_bridging_8021q_upper(struct net_device *dev,
1935 struct netdev_notifier_changeupper_info *info)
1937 struct netlink_ext_ack *ext_ack;
1938 struct net_device *slave;
1939 struct dsa_port *dp;
1941 ext_ack = netdev_notifier_info_to_extack(&info->info);
1943 if (!is_vlan_dev(dev))
1946 slave = vlan_dev_real_dev(dev);
1947 if (!dsa_slave_dev_check(slave))
1950 dp = dsa_slave_to_port(slave);
1951 if (!dp->bridge_dev)
1954 /* Deny enslaving a VLAN device into a VLAN-aware bridge */
1955 if (br_vlan_enabled(dp->bridge_dev) &&
1956 netif_is_bridge_master(info->upper_dev) && info->linking) {
1957 NL_SET_ERR_MSG_MOD(ext_ack,
1958 "Cannot enslave VLAN device into VLAN aware bridge");
1959 return notifier_from_errno(-EINVAL);
1966 dsa_slave_check_8021q_upper(struct net_device *dev,
1967 struct netdev_notifier_changeupper_info *info)
1969 struct dsa_port *dp = dsa_slave_to_port(dev);
1970 struct net_device *br = dp->bridge_dev;
1971 struct bridge_vlan_info br_info;
1972 struct netlink_ext_ack *extack;
1973 int err = NOTIFY_DONE;
1976 if (!br || !br_vlan_enabled(br))
1979 extack = netdev_notifier_info_to_extack(&info->info);
1980 vid = vlan_dev_vlan_id(info->upper_dev);
1982 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
1983 * device, respectively the VID is not found, returning
1984 * 0 means success, which is a failure for us here.
1986 err = br_vlan_get_info(br, vid, &br_info);
1988 NL_SET_ERR_MSG_MOD(extack,
1989 "This VLAN is already configured by the bridge");
1990 return notifier_from_errno(-EBUSY);
1996 static int dsa_slave_netdevice_event(struct notifier_block *nb,
1997 unsigned long event, void *ptr)
1999 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2002 case NETDEV_PRECHANGEUPPER: {
2003 struct netdev_notifier_changeupper_info *info = ptr;
2004 struct dsa_switch *ds;
2005 struct dsa_port *dp;
2008 if (!dsa_slave_dev_check(dev))
2009 return dsa_prevent_bridging_8021q_upper(dev, ptr);
2011 dp = dsa_slave_to_port(dev);
2014 if (ds->ops->port_prechangeupper) {
2015 err = ds->ops->port_prechangeupper(ds, dp->index, info);
2017 return notifier_from_errno(err);
2020 if (is_vlan_dev(info->upper_dev))
2021 return dsa_slave_check_8021q_upper(dev, ptr);
2024 case NETDEV_CHANGEUPPER:
2025 if (!dsa_slave_dev_check(dev))
2028 return dsa_slave_changeupper(dev, ptr);
2035 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work)
2037 struct dsa_switch *ds = switchdev_work->ds;
2038 struct switchdev_notifier_fdb_info info;
2039 struct dsa_port *dp;
2041 if (!dsa_is_user_port(ds, switchdev_work->port))
2044 info.addr = switchdev_work->addr;
2045 info.vid = switchdev_work->vid;
2046 info.offloaded = true;
2047 dp = dsa_to_port(ds, switchdev_work->port);
2048 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
2049 dp->slave, &info.info, NULL);
2052 static void dsa_slave_switchdev_event_work(struct work_struct *work)
2054 struct dsa_switchdev_event_work *switchdev_work =
2055 container_of(work, struct dsa_switchdev_event_work, work);
2056 struct dsa_switch *ds = switchdev_work->ds;
2057 struct dsa_port *dp;
2060 dp = dsa_to_port(ds, switchdev_work->port);
2063 switch (switchdev_work->event) {
2064 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2065 err = dsa_port_fdb_add(dp, switchdev_work->addr,
2066 switchdev_work->vid);
2069 "port %d failed to add %pM vid %d to fdb: %d\n",
2070 dp->index, switchdev_work->addr,
2071 switchdev_work->vid, err);
2074 dsa_fdb_offload_notify(switchdev_work);
2077 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2078 err = dsa_port_fdb_del(dp, switchdev_work->addr,
2079 switchdev_work->vid);
2082 "port %d failed to delete %pM vid %d from fdb: %d\n",
2083 dp->index, switchdev_work->addr,
2084 switchdev_work->vid, err);
2091 kfree(switchdev_work);
2092 if (dsa_is_user_port(ds, dp->index))
2096 static int dsa_lower_dev_walk(struct net_device *lower_dev,
2097 struct netdev_nested_priv *priv)
2099 if (dsa_slave_dev_check(lower_dev)) {
2100 priv->data = (void *)netdev_priv(lower_dev);
2107 static struct dsa_slave_priv *dsa_slave_dev_lower_find(struct net_device *dev)
2109 struct netdev_nested_priv priv = {
2113 netdev_walk_all_lower_dev_rcu(dev, dsa_lower_dev_walk, &priv);
2115 return (struct dsa_slave_priv *)priv.data;
2118 /* Called under rcu_read_lock() */
2119 static int dsa_slave_switchdev_event(struct notifier_block *unused,
2120 unsigned long event, void *ptr)
2122 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2123 const struct switchdev_notifier_fdb_info *fdb_info;
2124 struct dsa_switchdev_event_work *switchdev_work;
2125 struct dsa_port *dp;
2129 case SWITCHDEV_PORT_ATTR_SET:
2130 err = switchdev_handle_port_attr_set(dev, ptr,
2131 dsa_slave_dev_check,
2132 dsa_slave_port_attr_set);
2133 return notifier_from_errno(err);
2134 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2135 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2138 if (dsa_slave_dev_check(dev)) {
2139 if (!fdb_info->added_by_user)
2142 dp = dsa_slave_to_port(dev);
2144 /* Snoop addresses learnt on foreign interfaces
2145 * bridged with us, for switches that don't
2146 * automatically learn SA from CPU-injected traffic
2148 struct net_device *br_dev;
2149 struct dsa_slave_priv *p;
2151 br_dev = netdev_master_upper_dev_get_rcu(dev);
2155 if (!netif_is_bridge_master(br_dev))
2158 p = dsa_slave_dev_lower_find(br_dev);
2164 if (!dp->ds->assisted_learning_on_cpu_port)
2168 if (!dp->ds->ops->port_fdb_add || !dp->ds->ops->port_fdb_del)
2171 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2172 if (!switchdev_work)
2175 INIT_WORK(&switchdev_work->work,
2176 dsa_slave_switchdev_event_work);
2177 switchdev_work->ds = dp->ds;
2178 switchdev_work->port = dp->index;
2179 switchdev_work->event = event;
2181 ether_addr_copy(switchdev_work->addr,
2183 switchdev_work->vid = fdb_info->vid;
2185 /* Hold a reference on the slave for dsa_fdb_offload_notify */
2186 if (dsa_is_user_port(dp->ds, dp->index))
2188 dsa_schedule_work(&switchdev_work->work);
2197 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
2198 unsigned long event, void *ptr)
2200 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2204 case SWITCHDEV_PORT_OBJ_ADD:
2205 err = switchdev_handle_port_obj_add(dev, ptr,
2206 dsa_slave_dev_check,
2207 dsa_slave_port_obj_add);
2208 return notifier_from_errno(err);
2209 case SWITCHDEV_PORT_OBJ_DEL:
2210 err = switchdev_handle_port_obj_del(dev, ptr,
2211 dsa_slave_dev_check,
2212 dsa_slave_port_obj_del);
2213 return notifier_from_errno(err);
2214 case SWITCHDEV_PORT_ATTR_SET:
2215 err = switchdev_handle_port_attr_set(dev, ptr,
2216 dsa_slave_dev_check,
2217 dsa_slave_port_attr_set);
2218 return notifier_from_errno(err);
2224 static struct notifier_block dsa_slave_nb __read_mostly = {
2225 .notifier_call = dsa_slave_netdevice_event,
2228 static struct notifier_block dsa_slave_switchdev_notifier = {
2229 .notifier_call = dsa_slave_switchdev_event,
2232 static struct notifier_block dsa_slave_switchdev_blocking_notifier = {
2233 .notifier_call = dsa_slave_switchdev_blocking_event,
2236 int dsa_slave_register_notifier(void)
2238 struct notifier_block *nb;
2241 err = register_netdevice_notifier(&dsa_slave_nb);
2245 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
2247 goto err_switchdev_nb;
2249 nb = &dsa_slave_switchdev_blocking_notifier;
2250 err = register_switchdev_blocking_notifier(nb);
2252 goto err_switchdev_blocking_nb;
2256 err_switchdev_blocking_nb:
2257 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2259 unregister_netdevice_notifier(&dsa_slave_nb);
2263 void dsa_slave_unregister_notifier(void)
2265 struct notifier_block *nb;
2268 nb = &dsa_slave_switchdev_blocking_notifier;
2269 err = unregister_switchdev_blocking_notifier(nb);
2271 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
2273 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2275 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
2277 err = unregister_netdevice_notifier(&dsa_slave_nb);
2279 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);