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>
21 #include <linux/netpoll.h>
24 /* slave mii_bus handling ***************************************************/
25 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
27 struct dsa_switch *ds = bus->priv;
29 if (ds->phys_mii_mask & (1 << addr))
30 return ds->drv->phy_read(ds, addr, reg);
35 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
37 struct dsa_switch *ds = bus->priv;
39 if (ds->phys_mii_mask & (1 << addr))
40 return ds->drv->phy_write(ds, addr, reg, val);
45 void dsa_slave_mii_bus_init(struct dsa_switch *ds)
47 ds->slave_mii_bus->priv = (void *)ds;
48 ds->slave_mii_bus->name = "dsa slave smi";
49 ds->slave_mii_bus->read = dsa_slave_phy_read;
50 ds->slave_mii_bus->write = dsa_slave_phy_write;
51 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x",
52 ds->index, ds->pd->sw_addr);
53 ds->slave_mii_bus->parent = ds->master_dev;
54 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
58 /* slave device handling ****************************************************/
59 static int dsa_slave_get_iflink(const struct net_device *dev)
61 struct dsa_slave_priv *p = netdev_priv(dev);
63 return p->parent->dst->master_netdev->ifindex;
66 static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p)
68 return !!p->bridge_dev;
71 static int dsa_slave_open(struct net_device *dev)
73 struct dsa_slave_priv *p = netdev_priv(dev);
74 struct net_device *master = p->parent->dst->master_netdev;
75 struct dsa_switch *ds = p->parent;
76 u8 stp_state = dsa_port_is_bridged(p) ?
77 BR_STATE_BLOCKING : BR_STATE_FORWARDING;
80 if (!(master->flags & IFF_UP))
83 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
84 err = dev_uc_add(master, dev->dev_addr);
89 if (dev->flags & IFF_ALLMULTI) {
90 err = dev_set_allmulti(master, 1);
94 if (dev->flags & IFF_PROMISC) {
95 err = dev_set_promiscuity(master, 1);
100 if (ds->drv->port_enable) {
101 err = ds->drv->port_enable(ds, p->port, p->phy);
106 if (ds->drv->port_stp_update)
107 ds->drv->port_stp_update(ds, p->port, stp_state);
115 if (dev->flags & IFF_PROMISC)
116 dev_set_promiscuity(master, -1);
118 if (dev->flags & IFF_ALLMULTI)
119 dev_set_allmulti(master, -1);
121 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
122 dev_uc_del(master, dev->dev_addr);
127 static int dsa_slave_close(struct net_device *dev)
129 struct dsa_slave_priv *p = netdev_priv(dev);
130 struct net_device *master = p->parent->dst->master_netdev;
131 struct dsa_switch *ds = p->parent;
136 dev_mc_unsync(master, dev);
137 dev_uc_unsync(master, dev);
138 if (dev->flags & IFF_ALLMULTI)
139 dev_set_allmulti(master, -1);
140 if (dev->flags & IFF_PROMISC)
141 dev_set_promiscuity(master, -1);
143 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
144 dev_uc_del(master, dev->dev_addr);
146 if (ds->drv->port_disable)
147 ds->drv->port_disable(ds, p->port, p->phy);
149 if (ds->drv->port_stp_update)
150 ds->drv->port_stp_update(ds, p->port, BR_STATE_DISABLED);
155 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
157 struct dsa_slave_priv *p = netdev_priv(dev);
158 struct net_device *master = p->parent->dst->master_netdev;
160 if (change & IFF_ALLMULTI)
161 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
162 if (change & IFF_PROMISC)
163 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
166 static void dsa_slave_set_rx_mode(struct net_device *dev)
168 struct dsa_slave_priv *p = netdev_priv(dev);
169 struct net_device *master = p->parent->dst->master_netdev;
171 dev_mc_sync(master, dev);
172 dev_uc_sync(master, dev);
175 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
177 struct dsa_slave_priv *p = netdev_priv(dev);
178 struct net_device *master = p->parent->dst->master_netdev;
179 struct sockaddr *addr = a;
182 if (!is_valid_ether_addr(addr->sa_data))
183 return -EADDRNOTAVAIL;
185 if (!(dev->flags & IFF_UP))
188 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
189 err = dev_uc_add(master, addr->sa_data);
194 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
195 dev_uc_del(master, dev->dev_addr);
198 ether_addr_copy(dev->dev_addr, addr->sa_data);
203 static int dsa_slave_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
204 struct net_device *dev,
205 const unsigned char *addr, u16 vid, u16 nlm_flags)
207 struct dsa_slave_priv *p = netdev_priv(dev);
208 struct dsa_switch *ds = p->parent;
209 int ret = -EOPNOTSUPP;
211 if (ds->drv->fdb_add)
212 ret = ds->drv->fdb_add(ds, p->port, addr, vid);
217 static int dsa_slave_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
218 struct net_device *dev,
219 const unsigned char *addr, u16 vid)
221 struct dsa_slave_priv *p = netdev_priv(dev);
222 struct dsa_switch *ds = p->parent;
223 int ret = -EOPNOTSUPP;
225 if (ds->drv->fdb_del)
226 ret = ds->drv->fdb_del(ds, p->port, addr, vid);
231 static int dsa_slave_fill_info(struct net_device *dev, struct sk_buff *skb,
232 const unsigned char *addr, u16 vid,
234 u32 portid, u32 seq, int type,
237 struct nlmsghdr *nlh;
240 nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
244 ndm = nlmsg_data(nlh);
245 ndm->ndm_family = AF_BRIDGE;
248 ndm->ndm_flags = NTF_EXT_LEARNED;
250 ndm->ndm_ifindex = dev->ifindex;
251 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
253 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
254 goto nla_put_failure;
256 if (vid && nla_put_u16(skb, NDA_VLAN, vid))
257 goto nla_put_failure;
263 nlmsg_cancel(skb, nlh);
267 /* Dump information about entries, in response to GETNEIGH */
268 static int dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
269 struct net_device *dev,
270 struct net_device *filter_dev, int idx)
272 struct dsa_slave_priv *p = netdev_priv(dev);
273 struct dsa_switch *ds = p->parent;
274 unsigned char addr[ETH_ALEN] = { 0 };
277 if (!ds->drv->fdb_getnext)
283 ret = ds->drv->fdb_getnext(ds, p->port, addr, &is_static);
287 if (idx < cb->args[0])
290 ret = dsa_slave_fill_info(dev, skb, addr, 0,
292 NETLINK_CB(cb->skb).portid,
294 RTM_NEWNEIGH, NLM_F_MULTI);
302 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
304 struct dsa_slave_priv *p = netdev_priv(dev);
307 return phy_mii_ioctl(p->phy, ifr, cmd);
312 /* Return a bitmask of all ports being currently bridged within a given bridge
313 * device. Note that on leave, the mask will still return the bitmask of ports
314 * currently bridged, prior to port removal, and this is exactly what we want.
316 static u32 dsa_slave_br_port_mask(struct dsa_switch *ds,
317 struct net_device *bridge)
319 struct dsa_slave_priv *p;
323 for (port = 0; port < DSA_MAX_PORTS; port++) {
324 if (!dsa_is_port_initialized(ds, port))
327 p = netdev_priv(ds->ports[port]);
329 if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT &&
330 p->bridge_dev == bridge)
337 static int dsa_slave_stp_update(struct net_device *dev, u8 state)
339 struct dsa_slave_priv *p = netdev_priv(dev);
340 struct dsa_switch *ds = p->parent;
341 int ret = -EOPNOTSUPP;
343 if (ds->drv->port_stp_update)
344 ret = ds->drv->port_stp_update(ds, p->port, state);
349 static int dsa_slave_port_attr_set(struct net_device *dev,
350 struct switchdev_attr *attr)
355 case SWITCHDEV_ATTR_PORT_STP_STATE:
356 if (attr->trans == SWITCHDEV_TRANS_COMMIT)
357 ret = dsa_slave_stp_update(dev, attr->u.stp_state);
367 static int dsa_slave_bridge_port_join(struct net_device *dev,
368 struct net_device *br)
370 struct dsa_slave_priv *p = netdev_priv(dev);
371 struct dsa_switch *ds = p->parent;
372 int ret = -EOPNOTSUPP;
376 if (ds->drv->port_join_bridge)
377 ret = ds->drv->port_join_bridge(ds, p->port,
378 dsa_slave_br_port_mask(ds, br));
383 static int dsa_slave_bridge_port_leave(struct net_device *dev)
385 struct dsa_slave_priv *p = netdev_priv(dev);
386 struct dsa_switch *ds = p->parent;
387 int ret = -EOPNOTSUPP;
390 if (ds->drv->port_leave_bridge)
391 ret = ds->drv->port_leave_bridge(ds, p->port,
392 dsa_slave_br_port_mask(ds, p->bridge_dev));
394 p->bridge_dev = NULL;
396 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
397 * so allow it to be in BR_STATE_FORWARDING to be kept functional
399 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
404 static int dsa_slave_port_attr_get(struct net_device *dev,
405 struct switchdev_attr *attr)
407 struct dsa_slave_priv *p = netdev_priv(dev);
408 struct dsa_switch *ds = p->parent;
411 case SWITCHDEV_ATTR_PORT_PARENT_ID:
412 attr->u.ppid.id_len = sizeof(ds->index);
413 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
422 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
425 #ifdef CONFIG_NET_POLL_CONTROLLER
427 netpoll_send_skb(p->netpoll, skb);
434 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
436 struct dsa_slave_priv *p = netdev_priv(dev);
437 struct sk_buff *nskb;
439 dev->stats.tx_packets++;
440 dev->stats.tx_bytes += skb->len;
442 /* Transmit function may have to reallocate the original SKB */
443 nskb = p->xmit(skb, dev);
447 /* SKB for netpoll still need to be mangled with the protocol-specific
448 * tag to be successfully transmitted
450 if (unlikely(netpoll_tx_running(dev)))
451 return dsa_netpoll_send_skb(p, nskb);
453 /* Queue the SKB for transmission on the parent interface, but
454 * do not modify its EtherType
456 nskb->dev = p->parent->dst->master_netdev;
457 dev_queue_xmit(nskb);
462 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
463 struct net_device *dev)
465 /* Just return the original SKB */
470 /* ethtool operations *******************************************************/
472 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
474 struct dsa_slave_priv *p = netdev_priv(dev);
478 if (p->phy != NULL) {
479 err = phy_read_status(p->phy);
481 err = phy_ethtool_gset(p->phy, cmd);
488 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
490 struct dsa_slave_priv *p = netdev_priv(dev);
493 return phy_ethtool_sset(p->phy, cmd);
498 static void dsa_slave_get_drvinfo(struct net_device *dev,
499 struct ethtool_drvinfo *drvinfo)
501 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
502 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
503 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
504 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
507 static int dsa_slave_get_regs_len(struct net_device *dev)
509 struct dsa_slave_priv *p = netdev_priv(dev);
510 struct dsa_switch *ds = p->parent;
512 if (ds->drv->get_regs_len)
513 return ds->drv->get_regs_len(ds, p->port);
519 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
521 struct dsa_slave_priv *p = netdev_priv(dev);
522 struct dsa_switch *ds = p->parent;
524 if (ds->drv->get_regs)
525 ds->drv->get_regs(ds, p->port, regs, _p);
528 static int dsa_slave_nway_reset(struct net_device *dev)
530 struct dsa_slave_priv *p = netdev_priv(dev);
533 return genphy_restart_aneg(p->phy);
538 static u32 dsa_slave_get_link(struct net_device *dev)
540 struct dsa_slave_priv *p = netdev_priv(dev);
542 if (p->phy != NULL) {
543 genphy_update_link(p->phy);
550 static int dsa_slave_get_eeprom_len(struct net_device *dev)
552 struct dsa_slave_priv *p = netdev_priv(dev);
553 struct dsa_switch *ds = p->parent;
555 if (ds->pd->eeprom_len)
556 return ds->pd->eeprom_len;
558 if (ds->drv->get_eeprom_len)
559 return ds->drv->get_eeprom_len(ds);
564 static int dsa_slave_get_eeprom(struct net_device *dev,
565 struct ethtool_eeprom *eeprom, u8 *data)
567 struct dsa_slave_priv *p = netdev_priv(dev);
568 struct dsa_switch *ds = p->parent;
570 if (ds->drv->get_eeprom)
571 return ds->drv->get_eeprom(ds, eeprom, data);
576 static int dsa_slave_set_eeprom(struct net_device *dev,
577 struct ethtool_eeprom *eeprom, u8 *data)
579 struct dsa_slave_priv *p = netdev_priv(dev);
580 struct dsa_switch *ds = p->parent;
582 if (ds->drv->set_eeprom)
583 return ds->drv->set_eeprom(ds, eeprom, data);
588 static void dsa_slave_get_strings(struct net_device *dev,
589 uint32_t stringset, uint8_t *data)
591 struct dsa_slave_priv *p = netdev_priv(dev);
592 struct dsa_switch *ds = p->parent;
594 if (stringset == ETH_SS_STATS) {
595 int len = ETH_GSTRING_LEN;
597 strncpy(data, "tx_packets", len);
598 strncpy(data + len, "tx_bytes", len);
599 strncpy(data + 2 * len, "rx_packets", len);
600 strncpy(data + 3 * len, "rx_bytes", len);
601 if (ds->drv->get_strings != NULL)
602 ds->drv->get_strings(ds, p->port, data + 4 * len);
606 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
607 struct ethtool_stats *stats,
610 struct dsa_slave_priv *p = netdev_priv(dev);
611 struct dsa_switch *ds = p->parent;
613 data[0] = p->dev->stats.tx_packets;
614 data[1] = p->dev->stats.tx_bytes;
615 data[2] = p->dev->stats.rx_packets;
616 data[3] = p->dev->stats.rx_bytes;
617 if (ds->drv->get_ethtool_stats != NULL)
618 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
621 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
623 struct dsa_slave_priv *p = netdev_priv(dev);
624 struct dsa_switch *ds = p->parent;
626 if (sset == ETH_SS_STATS) {
630 if (ds->drv->get_sset_count != NULL)
631 count += ds->drv->get_sset_count(ds);
639 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
641 struct dsa_slave_priv *p = netdev_priv(dev);
642 struct dsa_switch *ds = p->parent;
644 if (ds->drv->get_wol)
645 ds->drv->get_wol(ds, p->port, w);
648 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
650 struct dsa_slave_priv *p = netdev_priv(dev);
651 struct dsa_switch *ds = p->parent;
652 int ret = -EOPNOTSUPP;
654 if (ds->drv->set_wol)
655 ret = ds->drv->set_wol(ds, p->port, w);
660 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
662 struct dsa_slave_priv *p = netdev_priv(dev);
663 struct dsa_switch *ds = p->parent;
666 if (!ds->drv->set_eee)
669 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
674 ret = phy_ethtool_set_eee(p->phy, e);
679 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
681 struct dsa_slave_priv *p = netdev_priv(dev);
682 struct dsa_switch *ds = p->parent;
685 if (!ds->drv->get_eee)
688 ret = ds->drv->get_eee(ds, p->port, e);
693 ret = phy_ethtool_get_eee(p->phy, e);
698 #ifdef CONFIG_NET_POLL_CONTROLLER
699 static int dsa_slave_netpoll_setup(struct net_device *dev,
700 struct netpoll_info *ni)
702 struct dsa_slave_priv *p = netdev_priv(dev);
703 struct dsa_switch *ds = p->parent;
704 struct net_device *master = ds->dst->master_netdev;
705 struct netpoll *netpoll;
708 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
712 err = __netpoll_setup(netpoll, master);
718 p->netpoll = netpoll;
723 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
725 struct dsa_slave_priv *p = netdev_priv(dev);
726 struct netpoll *netpoll = p->netpoll;
733 __netpoll_free_async(netpoll);
736 static void dsa_slave_poll_controller(struct net_device *dev)
741 static const struct ethtool_ops dsa_slave_ethtool_ops = {
742 .get_settings = dsa_slave_get_settings,
743 .set_settings = dsa_slave_set_settings,
744 .get_drvinfo = dsa_slave_get_drvinfo,
745 .get_regs_len = dsa_slave_get_regs_len,
746 .get_regs = dsa_slave_get_regs,
747 .nway_reset = dsa_slave_nway_reset,
748 .get_link = dsa_slave_get_link,
749 .get_eeprom_len = dsa_slave_get_eeprom_len,
750 .get_eeprom = dsa_slave_get_eeprom,
751 .set_eeprom = dsa_slave_set_eeprom,
752 .get_strings = dsa_slave_get_strings,
753 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
754 .get_sset_count = dsa_slave_get_sset_count,
755 .set_wol = dsa_slave_set_wol,
756 .get_wol = dsa_slave_get_wol,
757 .set_eee = dsa_slave_set_eee,
758 .get_eee = dsa_slave_get_eee,
761 static const struct net_device_ops dsa_slave_netdev_ops = {
762 .ndo_open = dsa_slave_open,
763 .ndo_stop = dsa_slave_close,
764 .ndo_start_xmit = dsa_slave_xmit,
765 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
766 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
767 .ndo_set_mac_address = dsa_slave_set_mac_address,
768 .ndo_fdb_add = dsa_slave_fdb_add,
769 .ndo_fdb_del = dsa_slave_fdb_del,
770 .ndo_fdb_dump = dsa_slave_fdb_dump,
771 .ndo_do_ioctl = dsa_slave_ioctl,
772 .ndo_get_iflink = dsa_slave_get_iflink,
773 #ifdef CONFIG_NET_POLL_CONTROLLER
774 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
775 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
776 .ndo_poll_controller = dsa_slave_poll_controller,
780 static const struct switchdev_ops dsa_slave_switchdev_ops = {
781 .switchdev_port_attr_get = dsa_slave_port_attr_get,
782 .switchdev_port_attr_set = dsa_slave_port_attr_set,
785 static void dsa_slave_adjust_link(struct net_device *dev)
787 struct dsa_slave_priv *p = netdev_priv(dev);
788 struct dsa_switch *ds = p->parent;
789 unsigned int status_changed = 0;
791 if (p->old_link != p->phy->link) {
793 p->old_link = p->phy->link;
796 if (p->old_duplex != p->phy->duplex) {
798 p->old_duplex = p->phy->duplex;
801 if (p->old_pause != p->phy->pause) {
803 p->old_pause = p->phy->pause;
806 if (ds->drv->adjust_link && status_changed)
807 ds->drv->adjust_link(ds, p->port, p->phy);
810 phy_print_status(p->phy);
813 static int dsa_slave_fixed_link_update(struct net_device *dev,
814 struct fixed_phy_status *status)
816 struct dsa_slave_priv *p = netdev_priv(dev);
817 struct dsa_switch *ds = p->parent;
819 if (ds->drv->fixed_link_update)
820 ds->drv->fixed_link_update(ds, p->port, status);
825 /* slave device setup *******************************************************/
826 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
827 struct net_device *slave_dev,
830 struct dsa_switch *ds = p->parent;
832 p->phy = ds->slave_mii_bus->phy_map[addr];
836 /* Use already configured phy mode */
837 p->phy_interface = p->phy->interface;
838 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
844 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
845 struct net_device *slave_dev)
847 struct dsa_switch *ds = p->parent;
848 struct dsa_chip_data *cd = ds->pd;
849 struct device_node *phy_dn, *port_dn;
850 bool phy_is_fixed = false;
854 port_dn = cd->port_dn[p->port];
855 mode = of_get_phy_mode(port_dn);
857 mode = PHY_INTERFACE_MODE_NA;
858 p->phy_interface = mode;
860 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
861 if (of_phy_is_fixed_link(port_dn)) {
862 /* In the case of a fixed PHY, the DT node associated
863 * to the fixed PHY is the Port DT node
865 ret = of_phy_register_fixed_link(port_dn);
867 netdev_err(slave_dev, "failed to register fixed PHY\n");
874 if (ds->drv->get_phy_flags)
875 phy_flags = ds->drv->get_phy_flags(ds, p->port);
878 ret = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
879 /* If this PHY address is part of phys_mii_mask, which means
880 * that we need to divert reads and writes to/from it, then we
881 * want to bind this device using the slave MII bus created by
882 * DSA to make that happen.
884 if (!phy_is_fixed && ret >= 0 &&
885 (ds->phys_mii_mask & (1 << ret))) {
886 ret = dsa_slave_phy_connect(p, slave_dev, ret);
890 p->phy = of_phy_connect(slave_dev, phy_dn,
891 dsa_slave_adjust_link,
897 if (p->phy && phy_is_fixed)
898 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
900 /* We could not connect to a designated PHY, so use the switch internal
904 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
908 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
909 p->phy->addr, p->phy->drv->name);
915 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
916 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
917 struct netdev_queue *txq,
920 lockdep_set_class(&txq->_xmit_lock,
921 &dsa_slave_netdev_xmit_lock_key);
924 int dsa_slave_suspend(struct net_device *slave_dev)
926 struct dsa_slave_priv *p = netdev_priv(slave_dev);
939 int dsa_slave_resume(struct net_device *slave_dev)
941 struct dsa_slave_priv *p = netdev_priv(slave_dev);
943 netif_device_attach(slave_dev);
953 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
954 int port, char *name)
956 struct net_device *master = ds->dst->master_netdev;
957 struct net_device *slave_dev;
958 struct dsa_slave_priv *p;
961 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
962 NET_NAME_UNKNOWN, ether_setup);
963 if (slave_dev == NULL)
966 slave_dev->features = master->vlan_features;
967 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
968 eth_hw_addr_inherit(slave_dev, master);
969 slave_dev->tx_queue_len = 0;
970 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
971 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
973 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
976 SET_NETDEV_DEV(slave_dev, parent);
977 slave_dev->dev.of_node = ds->pd->port_dn[port];
978 slave_dev->vlan_features = master->vlan_features;
980 p = netdev_priv(slave_dev);
985 switch (ds->dst->tag_protocol) {
986 #ifdef CONFIG_NET_DSA_TAG_DSA
987 case DSA_TAG_PROTO_DSA:
988 p->xmit = dsa_netdev_ops.xmit;
991 #ifdef CONFIG_NET_DSA_TAG_EDSA
992 case DSA_TAG_PROTO_EDSA:
993 p->xmit = edsa_netdev_ops.xmit;
996 #ifdef CONFIG_NET_DSA_TAG_TRAILER
997 case DSA_TAG_PROTO_TRAILER:
998 p->xmit = trailer_netdev_ops.xmit;
1001 #ifdef CONFIG_NET_DSA_TAG_BRCM
1002 case DSA_TAG_PROTO_BRCM:
1003 p->xmit = brcm_netdev_ops.xmit;
1007 p->xmit = dsa_slave_notag_xmit;
1015 ret = dsa_slave_phy_setup(p, slave_dev);
1017 free_netdev(slave_dev);
1021 ds->ports[port] = slave_dev;
1022 ret = register_netdev(slave_dev);
1024 netdev_err(master, "error %d registering interface %s\n",
1025 ret, slave_dev->name);
1026 phy_disconnect(p->phy);
1027 ds->ports[port] = NULL;
1028 free_netdev(slave_dev);
1032 netif_carrier_off(slave_dev);
1037 static bool dsa_slave_dev_check(struct net_device *dev)
1039 return dev->netdev_ops == &dsa_slave_netdev_ops;
1042 static int dsa_slave_master_changed(struct net_device *dev)
1044 struct net_device *master = netdev_master_upper_dev_get(dev);
1045 struct dsa_slave_priv *p = netdev_priv(dev);
1048 if (master && master->rtnl_link_ops &&
1049 !strcmp(master->rtnl_link_ops->kind, "bridge"))
1050 err = dsa_slave_bridge_port_join(dev, master);
1051 else if (dsa_port_is_bridged(p))
1052 err = dsa_slave_bridge_port_leave(dev);
1057 int dsa_slave_netdevice_event(struct notifier_block *unused,
1058 unsigned long event, void *ptr)
1060 struct net_device *dev;
1064 case NETDEV_CHANGEUPPER:
1065 dev = netdev_notifier_info_to_dev(ptr);
1066 if (!dsa_slave_dev_check(dev))
1069 err = dsa_slave_master_changed(dev);
1071 netdev_warn(dev, "failed to reflect master change\n");