2 * net/dsa/slave.c - Slave device handling
3 * Copyright (c) 2008-2009 Marvell Semiconductor
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
11 #include <linux/list.h>
12 #include <linux/etherdevice.h>
13 #include <linux/netdevice.h>
14 #include <linux/phy.h>
15 #include <linux/phy_fixed.h>
16 #include <linux/of_net.h>
17 #include <linux/of_mdio.h>
18 #include <net/rtnetlink.h>
19 #include <net/switchdev.h>
20 #include <linux/if_bridge.h>
23 /* slave mii_bus handling ***************************************************/
24 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
26 struct dsa_switch *ds = bus->priv;
28 if (ds->phys_mii_mask & (1 << addr))
29 return ds->drv->phy_read(ds, addr, reg);
34 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
36 struct dsa_switch *ds = bus->priv;
38 if (ds->phys_mii_mask & (1 << addr))
39 return ds->drv->phy_write(ds, addr, reg, val);
44 void dsa_slave_mii_bus_init(struct dsa_switch *ds)
46 ds->slave_mii_bus->priv = (void *)ds;
47 ds->slave_mii_bus->name = "dsa slave smi";
48 ds->slave_mii_bus->read = dsa_slave_phy_read;
49 ds->slave_mii_bus->write = dsa_slave_phy_write;
50 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x",
51 ds->index, ds->pd->sw_addr);
52 ds->slave_mii_bus->parent = ds->master_dev;
53 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
57 /* slave device handling ****************************************************/
58 static int dsa_slave_get_iflink(const struct net_device *dev)
60 struct dsa_slave_priv *p = netdev_priv(dev);
62 return p->parent->dst->master_netdev->ifindex;
65 static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p)
67 return !!p->bridge_dev;
70 static int dsa_slave_open(struct net_device *dev)
72 struct dsa_slave_priv *p = netdev_priv(dev);
73 struct net_device *master = p->parent->dst->master_netdev;
74 struct dsa_switch *ds = p->parent;
75 u8 stp_state = dsa_port_is_bridged(p) ?
76 BR_STATE_BLOCKING : BR_STATE_FORWARDING;
79 if (!(master->flags & IFF_UP))
82 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
83 err = dev_uc_add(master, dev->dev_addr);
88 if (dev->flags & IFF_ALLMULTI) {
89 err = dev_set_allmulti(master, 1);
93 if (dev->flags & IFF_PROMISC) {
94 err = dev_set_promiscuity(master, 1);
99 if (ds->drv->port_enable) {
100 err = ds->drv->port_enable(ds, p->port, p->phy);
105 if (ds->drv->port_stp_update)
106 ds->drv->port_stp_update(ds, p->port, stp_state);
114 if (dev->flags & IFF_PROMISC)
115 dev_set_promiscuity(master, -1);
117 if (dev->flags & IFF_ALLMULTI)
118 dev_set_allmulti(master, -1);
120 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
121 dev_uc_del(master, dev->dev_addr);
126 static int dsa_slave_close(struct net_device *dev)
128 struct dsa_slave_priv *p = netdev_priv(dev);
129 struct net_device *master = p->parent->dst->master_netdev;
130 struct dsa_switch *ds = p->parent;
135 dev_mc_unsync(master, dev);
136 dev_uc_unsync(master, dev);
137 if (dev->flags & IFF_ALLMULTI)
138 dev_set_allmulti(master, -1);
139 if (dev->flags & IFF_PROMISC)
140 dev_set_promiscuity(master, -1);
142 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
143 dev_uc_del(master, dev->dev_addr);
145 if (ds->drv->port_disable)
146 ds->drv->port_disable(ds, p->port, p->phy);
148 if (ds->drv->port_stp_update)
149 ds->drv->port_stp_update(ds, p->port, BR_STATE_DISABLED);
154 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
156 struct dsa_slave_priv *p = netdev_priv(dev);
157 struct net_device *master = p->parent->dst->master_netdev;
159 if (change & IFF_ALLMULTI)
160 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
161 if (change & IFF_PROMISC)
162 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
165 static void dsa_slave_set_rx_mode(struct net_device *dev)
167 struct dsa_slave_priv *p = netdev_priv(dev);
168 struct net_device *master = p->parent->dst->master_netdev;
170 dev_mc_sync(master, dev);
171 dev_uc_sync(master, dev);
174 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
176 struct dsa_slave_priv *p = netdev_priv(dev);
177 struct net_device *master = p->parent->dst->master_netdev;
178 struct sockaddr *addr = a;
181 if (!is_valid_ether_addr(addr->sa_data))
182 return -EADDRNOTAVAIL;
184 if (!(dev->flags & IFF_UP))
187 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
188 err = dev_uc_add(master, addr->sa_data);
193 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
194 dev_uc_del(master, dev->dev_addr);
197 ether_addr_copy(dev->dev_addr, addr->sa_data);
202 static int dsa_slave_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
203 struct net_device *dev,
204 const unsigned char *addr, u16 vid, u16 nlm_flags)
206 struct dsa_slave_priv *p = netdev_priv(dev);
207 struct dsa_switch *ds = p->parent;
208 int ret = -EOPNOTSUPP;
210 if (ds->drv->fdb_add)
211 ret = ds->drv->fdb_add(ds, p->port, addr, vid);
216 static int dsa_slave_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
217 struct net_device *dev,
218 const unsigned char *addr, u16 vid)
220 struct dsa_slave_priv *p = netdev_priv(dev);
221 struct dsa_switch *ds = p->parent;
222 int ret = -EOPNOTSUPP;
224 if (ds->drv->fdb_del)
225 ret = ds->drv->fdb_del(ds, p->port, addr, vid);
230 static int dsa_slave_fill_info(struct net_device *dev, struct sk_buff *skb,
231 const unsigned char *addr, u16 vid,
233 u32 portid, u32 seq, int type,
236 struct nlmsghdr *nlh;
239 nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
243 ndm = nlmsg_data(nlh);
244 ndm->ndm_family = AF_BRIDGE;
247 ndm->ndm_flags = NTF_EXT_LEARNED;
249 ndm->ndm_ifindex = dev->ifindex;
250 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
252 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
253 goto nla_put_failure;
255 if (vid && nla_put_u16(skb, NDA_VLAN, vid))
256 goto nla_put_failure;
262 nlmsg_cancel(skb, nlh);
266 /* Dump information about entries, in response to GETNEIGH */
267 static int dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
268 struct net_device *dev,
269 struct net_device *filter_dev, int idx)
271 struct dsa_slave_priv *p = netdev_priv(dev);
272 struct dsa_switch *ds = p->parent;
273 unsigned char addr[ETH_ALEN] = { 0 };
276 if (!ds->drv->fdb_getnext)
282 ret = ds->drv->fdb_getnext(ds, p->port, addr, &is_static);
286 if (idx < cb->args[0])
289 ret = dsa_slave_fill_info(dev, skb, addr, 0,
291 NETLINK_CB(cb->skb).portid,
293 RTM_NEWNEIGH, NLM_F_MULTI);
301 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
303 struct dsa_slave_priv *p = netdev_priv(dev);
306 return phy_mii_ioctl(p->phy, ifr, cmd);
311 /* Return a bitmask of all ports being currently bridged within a given bridge
312 * device. Note that on leave, the mask will still return the bitmask of ports
313 * currently bridged, prior to port removal, and this is exactly what we want.
315 static u32 dsa_slave_br_port_mask(struct dsa_switch *ds,
316 struct net_device *bridge)
318 struct dsa_slave_priv *p;
322 for (port = 0; port < DSA_MAX_PORTS; port++) {
323 if (!dsa_is_port_initialized(ds, port))
326 p = netdev_priv(ds->ports[port]);
328 if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT &&
329 p->bridge_dev == bridge)
336 static int dsa_slave_stp_update(struct net_device *dev, u8 state)
338 struct dsa_slave_priv *p = netdev_priv(dev);
339 struct dsa_switch *ds = p->parent;
340 int ret = -EOPNOTSUPP;
342 if (ds->drv->port_stp_update)
343 ret = ds->drv->port_stp_update(ds, p->port, state);
348 static int dsa_slave_port_attr_set(struct net_device *dev,
349 struct switchdev_attr *attr)
354 case SWITCHDEV_ATTR_PORT_STP_STATE:
355 if (attr->trans == SWITCHDEV_TRANS_COMMIT)
356 ret = dsa_slave_stp_update(dev, attr->u.stp_state);
366 static int dsa_slave_bridge_port_join(struct net_device *dev,
367 struct net_device *br)
369 struct dsa_slave_priv *p = netdev_priv(dev);
370 struct dsa_switch *ds = p->parent;
371 int ret = -EOPNOTSUPP;
375 if (ds->drv->port_join_bridge)
376 ret = ds->drv->port_join_bridge(ds, p->port,
377 dsa_slave_br_port_mask(ds, br));
382 static int dsa_slave_bridge_port_leave(struct net_device *dev)
384 struct dsa_slave_priv *p = netdev_priv(dev);
385 struct dsa_switch *ds = p->parent;
386 int ret = -EOPNOTSUPP;
389 if (ds->drv->port_leave_bridge)
390 ret = ds->drv->port_leave_bridge(ds, p->port,
391 dsa_slave_br_port_mask(ds, p->bridge_dev));
393 p->bridge_dev = NULL;
395 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
396 * so allow it to be in BR_STATE_FORWARDING to be kept functional
398 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
403 static int dsa_slave_port_attr_get(struct net_device *dev,
404 struct switchdev_attr *attr)
406 struct dsa_slave_priv *p = netdev_priv(dev);
407 struct dsa_switch *ds = p->parent;
410 case SWITCHDEV_ATTR_PORT_PARENT_ID:
411 attr->u.ppid.id_len = sizeof(ds->index);
412 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
421 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
423 struct dsa_slave_priv *p = netdev_priv(dev);
425 return p->xmit(skb, dev);
428 static netdev_tx_t dsa_slave_notag_xmit(struct sk_buff *skb,
429 struct net_device *dev)
431 struct dsa_slave_priv *p = netdev_priv(dev);
433 skb->dev = p->parent->dst->master_netdev;
440 /* ethtool operations *******************************************************/
442 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
444 struct dsa_slave_priv *p = netdev_priv(dev);
448 if (p->phy != NULL) {
449 err = phy_read_status(p->phy);
451 err = phy_ethtool_gset(p->phy, cmd);
458 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
460 struct dsa_slave_priv *p = netdev_priv(dev);
463 return phy_ethtool_sset(p->phy, cmd);
468 static void dsa_slave_get_drvinfo(struct net_device *dev,
469 struct ethtool_drvinfo *drvinfo)
471 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
472 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
473 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
474 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
477 static int dsa_slave_get_regs_len(struct net_device *dev)
479 struct dsa_slave_priv *p = netdev_priv(dev);
480 struct dsa_switch *ds = p->parent;
482 if (ds->drv->get_regs_len)
483 return ds->drv->get_regs_len(ds, p->port);
489 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
491 struct dsa_slave_priv *p = netdev_priv(dev);
492 struct dsa_switch *ds = p->parent;
494 if (ds->drv->get_regs)
495 ds->drv->get_regs(ds, p->port, regs, _p);
498 static int dsa_slave_nway_reset(struct net_device *dev)
500 struct dsa_slave_priv *p = netdev_priv(dev);
503 return genphy_restart_aneg(p->phy);
508 static u32 dsa_slave_get_link(struct net_device *dev)
510 struct dsa_slave_priv *p = netdev_priv(dev);
512 if (p->phy != NULL) {
513 genphy_update_link(p->phy);
520 static int dsa_slave_get_eeprom_len(struct net_device *dev)
522 struct dsa_slave_priv *p = netdev_priv(dev);
523 struct dsa_switch *ds = p->parent;
525 if (ds->pd->eeprom_len)
526 return ds->pd->eeprom_len;
528 if (ds->drv->get_eeprom_len)
529 return ds->drv->get_eeprom_len(ds);
534 static int dsa_slave_get_eeprom(struct net_device *dev,
535 struct ethtool_eeprom *eeprom, u8 *data)
537 struct dsa_slave_priv *p = netdev_priv(dev);
538 struct dsa_switch *ds = p->parent;
540 if (ds->drv->get_eeprom)
541 return ds->drv->get_eeprom(ds, eeprom, data);
546 static int dsa_slave_set_eeprom(struct net_device *dev,
547 struct ethtool_eeprom *eeprom, u8 *data)
549 struct dsa_slave_priv *p = netdev_priv(dev);
550 struct dsa_switch *ds = p->parent;
552 if (ds->drv->set_eeprom)
553 return ds->drv->set_eeprom(ds, eeprom, data);
558 static void dsa_slave_get_strings(struct net_device *dev,
559 uint32_t stringset, uint8_t *data)
561 struct dsa_slave_priv *p = netdev_priv(dev);
562 struct dsa_switch *ds = p->parent;
564 if (stringset == ETH_SS_STATS) {
565 int len = ETH_GSTRING_LEN;
567 strncpy(data, "tx_packets", len);
568 strncpy(data + len, "tx_bytes", len);
569 strncpy(data + 2 * len, "rx_packets", len);
570 strncpy(data + 3 * len, "rx_bytes", len);
571 if (ds->drv->get_strings != NULL)
572 ds->drv->get_strings(ds, p->port, data + 4 * len);
576 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
577 struct ethtool_stats *stats,
580 struct dsa_slave_priv *p = netdev_priv(dev);
581 struct dsa_switch *ds = p->parent;
583 data[0] = p->dev->stats.tx_packets;
584 data[1] = p->dev->stats.tx_bytes;
585 data[2] = p->dev->stats.rx_packets;
586 data[3] = p->dev->stats.rx_bytes;
587 if (ds->drv->get_ethtool_stats != NULL)
588 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
591 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
593 struct dsa_slave_priv *p = netdev_priv(dev);
594 struct dsa_switch *ds = p->parent;
596 if (sset == ETH_SS_STATS) {
600 if (ds->drv->get_sset_count != NULL)
601 count += ds->drv->get_sset_count(ds);
609 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
611 struct dsa_slave_priv *p = netdev_priv(dev);
612 struct dsa_switch *ds = p->parent;
614 if (ds->drv->get_wol)
615 ds->drv->get_wol(ds, p->port, w);
618 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
620 struct dsa_slave_priv *p = netdev_priv(dev);
621 struct dsa_switch *ds = p->parent;
622 int ret = -EOPNOTSUPP;
624 if (ds->drv->set_wol)
625 ret = ds->drv->set_wol(ds, p->port, w);
630 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
632 struct dsa_slave_priv *p = netdev_priv(dev);
633 struct dsa_switch *ds = p->parent;
636 if (!ds->drv->set_eee)
639 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
644 ret = phy_ethtool_set_eee(p->phy, e);
649 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
651 struct dsa_slave_priv *p = netdev_priv(dev);
652 struct dsa_switch *ds = p->parent;
655 if (!ds->drv->get_eee)
658 ret = ds->drv->get_eee(ds, p->port, e);
663 ret = phy_ethtool_get_eee(p->phy, e);
668 static const struct ethtool_ops dsa_slave_ethtool_ops = {
669 .get_settings = dsa_slave_get_settings,
670 .set_settings = dsa_slave_set_settings,
671 .get_drvinfo = dsa_slave_get_drvinfo,
672 .get_regs_len = dsa_slave_get_regs_len,
673 .get_regs = dsa_slave_get_regs,
674 .nway_reset = dsa_slave_nway_reset,
675 .get_link = dsa_slave_get_link,
676 .get_eeprom_len = dsa_slave_get_eeprom_len,
677 .get_eeprom = dsa_slave_get_eeprom,
678 .set_eeprom = dsa_slave_set_eeprom,
679 .get_strings = dsa_slave_get_strings,
680 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
681 .get_sset_count = dsa_slave_get_sset_count,
682 .set_wol = dsa_slave_set_wol,
683 .get_wol = dsa_slave_get_wol,
684 .set_eee = dsa_slave_set_eee,
685 .get_eee = dsa_slave_get_eee,
688 static const struct net_device_ops dsa_slave_netdev_ops = {
689 .ndo_open = dsa_slave_open,
690 .ndo_stop = dsa_slave_close,
691 .ndo_start_xmit = dsa_slave_xmit,
692 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
693 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
694 .ndo_set_mac_address = dsa_slave_set_mac_address,
695 .ndo_fdb_add = dsa_slave_fdb_add,
696 .ndo_fdb_del = dsa_slave_fdb_del,
697 .ndo_fdb_dump = dsa_slave_fdb_dump,
698 .ndo_do_ioctl = dsa_slave_ioctl,
699 .ndo_get_iflink = dsa_slave_get_iflink,
702 static const struct switchdev_ops dsa_slave_switchdev_ops = {
703 .switchdev_port_attr_get = dsa_slave_port_attr_get,
704 .switchdev_port_attr_set = dsa_slave_port_attr_set,
707 static void dsa_slave_adjust_link(struct net_device *dev)
709 struct dsa_slave_priv *p = netdev_priv(dev);
710 struct dsa_switch *ds = p->parent;
711 unsigned int status_changed = 0;
713 if (p->old_link != p->phy->link) {
715 p->old_link = p->phy->link;
718 if (p->old_duplex != p->phy->duplex) {
720 p->old_duplex = p->phy->duplex;
723 if (p->old_pause != p->phy->pause) {
725 p->old_pause = p->phy->pause;
728 if (ds->drv->adjust_link && status_changed)
729 ds->drv->adjust_link(ds, p->port, p->phy);
732 phy_print_status(p->phy);
735 static int dsa_slave_fixed_link_update(struct net_device *dev,
736 struct fixed_phy_status *status)
738 struct dsa_slave_priv *p = netdev_priv(dev);
739 struct dsa_switch *ds = p->parent;
741 if (ds->drv->fixed_link_update)
742 ds->drv->fixed_link_update(ds, p->port, status);
747 /* slave device setup *******************************************************/
748 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
749 struct net_device *slave_dev,
752 struct dsa_switch *ds = p->parent;
754 p->phy = ds->slave_mii_bus->phy_map[addr];
758 /* Use already configured phy mode */
759 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
760 p->phy_interface = p->phy->interface;
761 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
767 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
768 struct net_device *slave_dev)
770 struct dsa_switch *ds = p->parent;
771 struct dsa_chip_data *cd = ds->pd;
772 struct device_node *phy_dn, *port_dn;
773 bool phy_is_fixed = false;
777 port_dn = cd->port_dn[p->port];
778 mode = of_get_phy_mode(port_dn);
780 mode = PHY_INTERFACE_MODE_NA;
781 p->phy_interface = mode;
783 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
784 if (of_phy_is_fixed_link(port_dn)) {
785 /* In the case of a fixed PHY, the DT node associated
786 * to the fixed PHY is the Port DT node
788 ret = of_phy_register_fixed_link(port_dn);
790 netdev_err(slave_dev, "failed to register fixed PHY\n");
797 if (ds->drv->get_phy_flags)
798 phy_flags = ds->drv->get_phy_flags(ds, p->port);
801 ret = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
802 /* If this PHY address is part of phys_mii_mask, which means
803 * that we need to divert reads and writes to/from it, then we
804 * want to bind this device using the slave MII bus created by
805 * DSA to make that happen.
807 if (!phy_is_fixed && ret >= 0 &&
808 (ds->phys_mii_mask & (1 << ret))) {
809 ret = dsa_slave_phy_connect(p, slave_dev, ret);
813 p->phy = of_phy_connect(slave_dev, phy_dn,
814 dsa_slave_adjust_link,
820 if (p->phy && phy_is_fixed)
821 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
823 /* We could not connect to a designated PHY, so use the switch internal
827 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
831 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
832 p->phy->addr, p->phy->drv->name);
838 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
839 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
840 struct netdev_queue *txq,
843 lockdep_set_class(&txq->_xmit_lock,
844 &dsa_slave_netdev_xmit_lock_key);
847 int dsa_slave_suspend(struct net_device *slave_dev)
849 struct dsa_slave_priv *p = netdev_priv(slave_dev);
862 int dsa_slave_resume(struct net_device *slave_dev)
864 struct dsa_slave_priv *p = netdev_priv(slave_dev);
866 netif_device_attach(slave_dev);
876 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
877 int port, char *name)
879 struct net_device *master = ds->dst->master_netdev;
880 struct net_device *slave_dev;
881 struct dsa_slave_priv *p;
884 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
885 NET_NAME_UNKNOWN, ether_setup);
886 if (slave_dev == NULL)
889 slave_dev->features = master->vlan_features;
890 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
891 eth_hw_addr_inherit(slave_dev, master);
892 slave_dev->tx_queue_len = 0;
893 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
894 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
896 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
899 SET_NETDEV_DEV(slave_dev, parent);
900 slave_dev->dev.of_node = ds->pd->port_dn[port];
901 slave_dev->vlan_features = master->vlan_features;
903 p = netdev_priv(slave_dev);
908 switch (ds->dst->tag_protocol) {
909 #ifdef CONFIG_NET_DSA_TAG_DSA
910 case DSA_TAG_PROTO_DSA:
911 p->xmit = dsa_netdev_ops.xmit;
914 #ifdef CONFIG_NET_DSA_TAG_EDSA
915 case DSA_TAG_PROTO_EDSA:
916 p->xmit = edsa_netdev_ops.xmit;
919 #ifdef CONFIG_NET_DSA_TAG_TRAILER
920 case DSA_TAG_PROTO_TRAILER:
921 p->xmit = trailer_netdev_ops.xmit;
924 #ifdef CONFIG_NET_DSA_TAG_BRCM
925 case DSA_TAG_PROTO_BRCM:
926 p->xmit = brcm_netdev_ops.xmit;
930 p->xmit = dsa_slave_notag_xmit;
938 ret = dsa_slave_phy_setup(p, slave_dev);
940 free_netdev(slave_dev);
944 ds->ports[port] = slave_dev;
945 ret = register_netdev(slave_dev);
947 netdev_err(master, "error %d registering interface %s\n",
948 ret, slave_dev->name);
949 phy_disconnect(p->phy);
950 ds->ports[port] = NULL;
951 free_netdev(slave_dev);
955 netif_carrier_off(slave_dev);
960 static bool dsa_slave_dev_check(struct net_device *dev)
962 return dev->netdev_ops == &dsa_slave_netdev_ops;
965 static int dsa_slave_master_changed(struct net_device *dev)
967 struct net_device *master = netdev_master_upper_dev_get(dev);
968 struct dsa_slave_priv *p = netdev_priv(dev);
971 if (master && master->rtnl_link_ops &&
972 !strcmp(master->rtnl_link_ops->kind, "bridge"))
973 err = dsa_slave_bridge_port_join(dev, master);
974 else if (dsa_port_is_bridged(p))
975 err = dsa_slave_bridge_port_leave(dev);
980 int dsa_slave_netdevice_event(struct notifier_block *unused,
981 unsigned long event, void *ptr)
983 struct net_device *dev;
987 case NETDEV_CHANGEUPPER:
988 dev = netdev_notifier_info_to_dev(ptr);
989 if (!dsa_slave_dev_check(dev))
992 err = dsa_slave_master_changed(dev);
994 netdev_warn(dev, "failed to reflect master change\n");