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 (dev->flags & IFF_UP) {
161 if (change & IFF_ALLMULTI)
162 dev_set_allmulti(master,
163 dev->flags & IFF_ALLMULTI ? 1 : -1);
164 if (change & IFF_PROMISC)
165 dev_set_promiscuity(master,
166 dev->flags & IFF_PROMISC ? 1 : -1);
170 static void dsa_slave_set_rx_mode(struct net_device *dev)
172 struct dsa_slave_priv *p = netdev_priv(dev);
173 struct net_device *master = p->parent->dst->master_netdev;
175 dev_mc_sync(master, dev);
176 dev_uc_sync(master, dev);
179 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
181 struct dsa_slave_priv *p = netdev_priv(dev);
182 struct net_device *master = p->parent->dst->master_netdev;
183 struct sockaddr *addr = a;
186 if (!is_valid_ether_addr(addr->sa_data))
187 return -EADDRNOTAVAIL;
189 if (!(dev->flags & IFF_UP))
192 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
193 err = dev_uc_add(master, addr->sa_data);
198 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
199 dev_uc_del(master, dev->dev_addr);
202 ether_addr_copy(dev->dev_addr, addr->sa_data);
207 static int dsa_bridge_check_vlan_range(struct dsa_switch *ds,
208 const struct net_device *bridge,
209 u16 vid_begin, u16 vid_end)
211 struct dsa_slave_priv *p;
212 struct net_device *dev, *vlan_br;
213 DECLARE_BITMAP(members, DSA_MAX_PORTS);
214 DECLARE_BITMAP(untagged, DSA_MAX_PORTS);
218 if (!ds->drv->vlan_getnext || !vid_begin)
224 err = ds->drv->vlan_getnext(ds, &vid, members, untagged);
231 member = find_first_bit(members, DSA_MAX_PORTS);
232 if (member == DSA_MAX_PORTS)
235 dev = ds->ports[member];
236 p = netdev_priv(dev);
237 vlan_br = p->bridge_dev;
238 if (vlan_br == bridge)
241 netdev_dbg(vlan_br, "hardware VLAN %d already in use\n", vid);
243 } while (vid < vid_end);
245 return err == -ENOENT ? 0 : err;
248 static int dsa_slave_port_vlan_add(struct net_device *dev,
249 const struct switchdev_obj_port_vlan *vlan,
250 struct switchdev_trans *trans)
252 struct dsa_slave_priv *p = netdev_priv(dev);
253 struct dsa_switch *ds = p->parent;
256 if (switchdev_trans_ph_prepare(trans)) {
257 if (!ds->drv->port_vlan_prepare || !ds->drv->port_vlan_add)
260 /* If the requested port doesn't belong to the same bridge as
261 * the VLAN members, fallback to software VLAN (hopefully).
263 err = dsa_bridge_check_vlan_range(ds, p->bridge_dev,
269 err = ds->drv->port_vlan_prepare(ds, p->port, vlan, trans);
273 err = ds->drv->port_vlan_add(ds, p->port, vlan, trans);
281 static int dsa_slave_port_vlan_del(struct net_device *dev,
282 const struct switchdev_obj_port_vlan *vlan)
284 struct dsa_slave_priv *p = netdev_priv(dev);
285 struct dsa_switch *ds = p->parent;
287 if (!ds->drv->port_vlan_del)
290 return ds->drv->port_vlan_del(ds, p->port, vlan);
293 static int dsa_slave_port_vlan_dump(struct net_device *dev,
294 struct switchdev_obj_port_vlan *vlan,
295 switchdev_obj_dump_cb_t *cb)
297 struct dsa_slave_priv *p = netdev_priv(dev);
298 struct dsa_switch *ds = p->parent;
299 DECLARE_BITMAP(members, DSA_MAX_PORTS);
300 DECLARE_BITMAP(untagged, DSA_MAX_PORTS);
304 if (!ds->drv->vlan_getnext || !ds->drv->port_pvid_get)
307 err = ds->drv->port_pvid_get(ds, p->port, &pvid);
312 err = ds->drv->vlan_getnext(ds, &vid, members, untagged);
316 if (!test_bit(p->port, members))
319 memset(vlan, 0, sizeof(*vlan));
320 vlan->vid_begin = vlan->vid_end = vid;
323 vlan->flags |= BRIDGE_VLAN_INFO_PVID;
325 if (test_bit(p->port, untagged))
326 vlan->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
328 err = cb(&vlan->obj);
333 return err == -ENOENT ? 0 : err;
336 static int dsa_slave_port_fdb_add(struct net_device *dev,
337 const struct switchdev_obj_port_fdb *fdb,
338 struct switchdev_trans *trans)
340 struct dsa_slave_priv *p = netdev_priv(dev);
341 struct dsa_switch *ds = p->parent;
344 if (!ds->drv->port_fdb_prepare || !ds->drv->port_fdb_add)
347 if (switchdev_trans_ph_prepare(trans))
348 ret = ds->drv->port_fdb_prepare(ds, p->port, fdb, trans);
350 ret = ds->drv->port_fdb_add(ds, p->port, fdb, trans);
355 static int dsa_slave_port_fdb_del(struct net_device *dev,
356 const struct switchdev_obj_port_fdb *fdb)
358 struct dsa_slave_priv *p = netdev_priv(dev);
359 struct dsa_switch *ds = p->parent;
360 int ret = -EOPNOTSUPP;
362 if (ds->drv->port_fdb_del)
363 ret = ds->drv->port_fdb_del(ds, p->port, fdb);
368 static int dsa_slave_port_fdb_dump(struct net_device *dev,
369 struct switchdev_obj_port_fdb *fdb,
370 switchdev_obj_dump_cb_t *cb)
372 struct dsa_slave_priv *p = netdev_priv(dev);
373 struct dsa_switch *ds = p->parent;
375 if (ds->drv->port_fdb_dump)
376 return ds->drv->port_fdb_dump(ds, p->port, fdb, cb);
381 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
383 struct dsa_slave_priv *p = netdev_priv(dev);
386 return phy_mii_ioctl(p->phy, ifr, cmd);
391 /* Return a bitmask of all ports being currently bridged within a given bridge
392 * device. Note that on leave, the mask will still return the bitmask of ports
393 * currently bridged, prior to port removal, and this is exactly what we want.
395 static u32 dsa_slave_br_port_mask(struct dsa_switch *ds,
396 struct net_device *bridge)
398 struct dsa_slave_priv *p;
402 for (port = 0; port < DSA_MAX_PORTS; port++) {
403 if (!dsa_is_port_initialized(ds, port))
406 p = netdev_priv(ds->ports[port]);
408 if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT &&
409 p->bridge_dev == bridge)
416 static int dsa_slave_stp_update(struct net_device *dev, u8 state)
418 struct dsa_slave_priv *p = netdev_priv(dev);
419 struct dsa_switch *ds = p->parent;
420 int ret = -EOPNOTSUPP;
422 if (ds->drv->port_stp_update)
423 ret = ds->drv->port_stp_update(ds, p->port, state);
428 static int dsa_slave_port_attr_set(struct net_device *dev,
429 const struct switchdev_attr *attr,
430 struct switchdev_trans *trans)
432 struct dsa_slave_priv *p = netdev_priv(dev);
433 struct dsa_switch *ds = p->parent;
437 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
438 if (switchdev_trans_ph_prepare(trans))
439 ret = ds->drv->port_stp_update ? 0 : -EOPNOTSUPP;
441 ret = ds->drv->port_stp_update(ds, p->port,
452 static int dsa_slave_port_obj_add(struct net_device *dev,
453 const struct switchdev_obj *obj,
454 struct switchdev_trans *trans)
458 /* For the prepare phase, ensure the full set of changes is feasable in
459 * one go in order to signal a failure properly. If an operation is not
460 * supported, return -EOPNOTSUPP.
464 case SWITCHDEV_OBJ_ID_PORT_FDB:
465 err = dsa_slave_port_fdb_add(dev,
466 SWITCHDEV_OBJ_PORT_FDB(obj),
469 case SWITCHDEV_OBJ_ID_PORT_VLAN:
470 err = dsa_slave_port_vlan_add(dev,
471 SWITCHDEV_OBJ_PORT_VLAN(obj),
482 static int dsa_slave_port_obj_del(struct net_device *dev,
483 const struct switchdev_obj *obj)
488 case SWITCHDEV_OBJ_ID_PORT_FDB:
489 err = dsa_slave_port_fdb_del(dev,
490 SWITCHDEV_OBJ_PORT_FDB(obj));
492 case SWITCHDEV_OBJ_ID_PORT_VLAN:
493 err = dsa_slave_port_vlan_del(dev,
494 SWITCHDEV_OBJ_PORT_VLAN(obj));
504 static int dsa_slave_port_obj_dump(struct net_device *dev,
505 struct switchdev_obj *obj,
506 switchdev_obj_dump_cb_t *cb)
511 case SWITCHDEV_OBJ_ID_PORT_FDB:
512 err = dsa_slave_port_fdb_dump(dev,
513 SWITCHDEV_OBJ_PORT_FDB(obj),
516 case SWITCHDEV_OBJ_ID_PORT_VLAN:
517 err = dsa_slave_port_vlan_dump(dev,
518 SWITCHDEV_OBJ_PORT_VLAN(obj),
529 static int dsa_slave_bridge_port_join(struct net_device *dev,
530 struct net_device *br)
532 struct dsa_slave_priv *p = netdev_priv(dev);
533 struct dsa_switch *ds = p->parent;
534 int ret = -EOPNOTSUPP;
538 if (ds->drv->port_join_bridge)
539 ret = ds->drv->port_join_bridge(ds, p->port,
540 dsa_slave_br_port_mask(ds, br));
545 static int dsa_slave_bridge_port_leave(struct net_device *dev)
547 struct dsa_slave_priv *p = netdev_priv(dev);
548 struct dsa_switch *ds = p->parent;
549 int ret = -EOPNOTSUPP;
552 if (ds->drv->port_leave_bridge)
553 ret = ds->drv->port_leave_bridge(ds, p->port,
554 dsa_slave_br_port_mask(ds, p->bridge_dev));
556 p->bridge_dev = NULL;
558 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
559 * so allow it to be in BR_STATE_FORWARDING to be kept functional
561 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
566 static int dsa_slave_port_attr_get(struct net_device *dev,
567 struct switchdev_attr *attr)
569 struct dsa_slave_priv *p = netdev_priv(dev);
570 struct dsa_switch *ds = p->parent;
573 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
574 attr->u.ppid.id_len = sizeof(ds->index);
575 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
584 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
587 #ifdef CONFIG_NET_POLL_CONTROLLER
589 netpoll_send_skb(p->netpoll, skb);
596 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
598 struct dsa_slave_priv *p = netdev_priv(dev);
599 struct sk_buff *nskb;
601 dev->stats.tx_packets++;
602 dev->stats.tx_bytes += skb->len;
604 /* Transmit function may have to reallocate the original SKB */
605 nskb = p->xmit(skb, dev);
609 /* SKB for netpoll still need to be mangled with the protocol-specific
610 * tag to be successfully transmitted
612 if (unlikely(netpoll_tx_running(dev)))
613 return dsa_netpoll_send_skb(p, nskb);
615 /* Queue the SKB for transmission on the parent interface, but
616 * do not modify its EtherType
618 nskb->dev = p->parent->dst->master_netdev;
619 dev_queue_xmit(nskb);
624 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
625 struct net_device *dev)
627 /* Just return the original SKB */
632 /* ethtool operations *******************************************************/
634 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
636 struct dsa_slave_priv *p = netdev_priv(dev);
640 if (p->phy != NULL) {
641 err = phy_read_status(p->phy);
643 err = phy_ethtool_gset(p->phy, cmd);
650 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
652 struct dsa_slave_priv *p = netdev_priv(dev);
655 return phy_ethtool_sset(p->phy, cmd);
660 static void dsa_slave_get_drvinfo(struct net_device *dev,
661 struct ethtool_drvinfo *drvinfo)
663 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
664 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
665 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
666 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
669 static int dsa_slave_get_regs_len(struct net_device *dev)
671 struct dsa_slave_priv *p = netdev_priv(dev);
672 struct dsa_switch *ds = p->parent;
674 if (ds->drv->get_regs_len)
675 return ds->drv->get_regs_len(ds, p->port);
681 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
683 struct dsa_slave_priv *p = netdev_priv(dev);
684 struct dsa_switch *ds = p->parent;
686 if (ds->drv->get_regs)
687 ds->drv->get_regs(ds, p->port, regs, _p);
690 static int dsa_slave_nway_reset(struct net_device *dev)
692 struct dsa_slave_priv *p = netdev_priv(dev);
695 return genphy_restart_aneg(p->phy);
700 static u32 dsa_slave_get_link(struct net_device *dev)
702 struct dsa_slave_priv *p = netdev_priv(dev);
704 if (p->phy != NULL) {
705 genphy_update_link(p->phy);
712 static int dsa_slave_get_eeprom_len(struct net_device *dev)
714 struct dsa_slave_priv *p = netdev_priv(dev);
715 struct dsa_switch *ds = p->parent;
717 if (ds->pd->eeprom_len)
718 return ds->pd->eeprom_len;
720 if (ds->drv->get_eeprom_len)
721 return ds->drv->get_eeprom_len(ds);
726 static int dsa_slave_get_eeprom(struct net_device *dev,
727 struct ethtool_eeprom *eeprom, u8 *data)
729 struct dsa_slave_priv *p = netdev_priv(dev);
730 struct dsa_switch *ds = p->parent;
732 if (ds->drv->get_eeprom)
733 return ds->drv->get_eeprom(ds, eeprom, data);
738 static int dsa_slave_set_eeprom(struct net_device *dev,
739 struct ethtool_eeprom *eeprom, u8 *data)
741 struct dsa_slave_priv *p = netdev_priv(dev);
742 struct dsa_switch *ds = p->parent;
744 if (ds->drv->set_eeprom)
745 return ds->drv->set_eeprom(ds, eeprom, data);
750 static void dsa_slave_get_strings(struct net_device *dev,
751 uint32_t stringset, uint8_t *data)
753 struct dsa_slave_priv *p = netdev_priv(dev);
754 struct dsa_switch *ds = p->parent;
756 if (stringset == ETH_SS_STATS) {
757 int len = ETH_GSTRING_LEN;
759 strncpy(data, "tx_packets", len);
760 strncpy(data + len, "tx_bytes", len);
761 strncpy(data + 2 * len, "rx_packets", len);
762 strncpy(data + 3 * len, "rx_bytes", len);
763 if (ds->drv->get_strings != NULL)
764 ds->drv->get_strings(ds, p->port, data + 4 * len);
768 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
769 struct ethtool_stats *stats,
772 struct dsa_slave_priv *p = netdev_priv(dev);
773 struct dsa_switch *ds = p->parent;
775 data[0] = p->dev->stats.tx_packets;
776 data[1] = p->dev->stats.tx_bytes;
777 data[2] = p->dev->stats.rx_packets;
778 data[3] = p->dev->stats.rx_bytes;
779 if (ds->drv->get_ethtool_stats != NULL)
780 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
783 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
785 struct dsa_slave_priv *p = netdev_priv(dev);
786 struct dsa_switch *ds = p->parent;
788 if (sset == ETH_SS_STATS) {
792 if (ds->drv->get_sset_count != NULL)
793 count += ds->drv->get_sset_count(ds);
801 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
803 struct dsa_slave_priv *p = netdev_priv(dev);
804 struct dsa_switch *ds = p->parent;
806 if (ds->drv->get_wol)
807 ds->drv->get_wol(ds, p->port, w);
810 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
812 struct dsa_slave_priv *p = netdev_priv(dev);
813 struct dsa_switch *ds = p->parent;
814 int ret = -EOPNOTSUPP;
816 if (ds->drv->set_wol)
817 ret = ds->drv->set_wol(ds, p->port, w);
822 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
824 struct dsa_slave_priv *p = netdev_priv(dev);
825 struct dsa_switch *ds = p->parent;
828 if (!ds->drv->set_eee)
831 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
836 ret = phy_ethtool_set_eee(p->phy, e);
841 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
843 struct dsa_slave_priv *p = netdev_priv(dev);
844 struct dsa_switch *ds = p->parent;
847 if (!ds->drv->get_eee)
850 ret = ds->drv->get_eee(ds, p->port, e);
855 ret = phy_ethtool_get_eee(p->phy, e);
860 #ifdef CONFIG_NET_POLL_CONTROLLER
861 static int dsa_slave_netpoll_setup(struct net_device *dev,
862 struct netpoll_info *ni)
864 struct dsa_slave_priv *p = netdev_priv(dev);
865 struct dsa_switch *ds = p->parent;
866 struct net_device *master = ds->dst->master_netdev;
867 struct netpoll *netpoll;
870 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
874 err = __netpoll_setup(netpoll, master);
880 p->netpoll = netpoll;
885 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
887 struct dsa_slave_priv *p = netdev_priv(dev);
888 struct netpoll *netpoll = p->netpoll;
895 __netpoll_free_async(netpoll);
898 static void dsa_slave_poll_controller(struct net_device *dev)
903 static const struct ethtool_ops dsa_slave_ethtool_ops = {
904 .get_settings = dsa_slave_get_settings,
905 .set_settings = dsa_slave_set_settings,
906 .get_drvinfo = dsa_slave_get_drvinfo,
907 .get_regs_len = dsa_slave_get_regs_len,
908 .get_regs = dsa_slave_get_regs,
909 .nway_reset = dsa_slave_nway_reset,
910 .get_link = dsa_slave_get_link,
911 .get_eeprom_len = dsa_slave_get_eeprom_len,
912 .get_eeprom = dsa_slave_get_eeprom,
913 .set_eeprom = dsa_slave_set_eeprom,
914 .get_strings = dsa_slave_get_strings,
915 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
916 .get_sset_count = dsa_slave_get_sset_count,
917 .set_wol = dsa_slave_set_wol,
918 .get_wol = dsa_slave_get_wol,
919 .set_eee = dsa_slave_set_eee,
920 .get_eee = dsa_slave_get_eee,
923 static const struct net_device_ops dsa_slave_netdev_ops = {
924 .ndo_open = dsa_slave_open,
925 .ndo_stop = dsa_slave_close,
926 .ndo_start_xmit = dsa_slave_xmit,
927 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
928 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
929 .ndo_set_mac_address = dsa_slave_set_mac_address,
930 .ndo_fdb_add = switchdev_port_fdb_add,
931 .ndo_fdb_del = switchdev_port_fdb_del,
932 .ndo_fdb_dump = switchdev_port_fdb_dump,
933 .ndo_do_ioctl = dsa_slave_ioctl,
934 .ndo_get_iflink = dsa_slave_get_iflink,
935 #ifdef CONFIG_NET_POLL_CONTROLLER
936 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
937 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
938 .ndo_poll_controller = dsa_slave_poll_controller,
940 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
941 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
942 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
945 static const struct switchdev_ops dsa_slave_switchdev_ops = {
946 .switchdev_port_attr_get = dsa_slave_port_attr_get,
947 .switchdev_port_attr_set = dsa_slave_port_attr_set,
948 .switchdev_port_obj_add = dsa_slave_port_obj_add,
949 .switchdev_port_obj_del = dsa_slave_port_obj_del,
950 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
953 static struct device_type dsa_type = {
957 static void dsa_slave_adjust_link(struct net_device *dev)
959 struct dsa_slave_priv *p = netdev_priv(dev);
960 struct dsa_switch *ds = p->parent;
961 unsigned int status_changed = 0;
963 if (p->old_link != p->phy->link) {
965 p->old_link = p->phy->link;
968 if (p->old_duplex != p->phy->duplex) {
970 p->old_duplex = p->phy->duplex;
973 if (p->old_pause != p->phy->pause) {
975 p->old_pause = p->phy->pause;
978 if (ds->drv->adjust_link && status_changed)
979 ds->drv->adjust_link(ds, p->port, p->phy);
982 phy_print_status(p->phy);
985 static int dsa_slave_fixed_link_update(struct net_device *dev,
986 struct fixed_phy_status *status)
988 struct dsa_slave_priv *p = netdev_priv(dev);
989 struct dsa_switch *ds = p->parent;
991 if (ds->drv->fixed_link_update)
992 ds->drv->fixed_link_update(ds, p->port, status);
997 /* slave device setup *******************************************************/
998 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
999 struct net_device *slave_dev,
1002 struct dsa_switch *ds = p->parent;
1004 p->phy = ds->slave_mii_bus->phy_map[addr];
1006 netdev_err(slave_dev, "no phy at %d\n", addr);
1010 /* Use already configured phy mode */
1011 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1012 p->phy_interface = p->phy->interface;
1013 return phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
1017 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
1018 struct net_device *slave_dev)
1020 struct dsa_switch *ds = p->parent;
1021 struct dsa_chip_data *cd = ds->pd;
1022 struct device_node *phy_dn, *port_dn;
1023 bool phy_is_fixed = false;
1027 port_dn = cd->port_dn[p->port];
1028 mode = of_get_phy_mode(port_dn);
1030 mode = PHY_INTERFACE_MODE_NA;
1031 p->phy_interface = mode;
1033 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1034 if (!phy_dn && of_phy_is_fixed_link(port_dn)) {
1035 /* In the case of a fixed PHY, the DT node associated
1036 * to the fixed PHY is the Port DT node
1038 ret = of_phy_register_fixed_link(port_dn);
1040 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
1043 phy_is_fixed = true;
1044 phy_dn = of_node_get(port_dn);
1047 if (ds->drv->get_phy_flags)
1048 phy_flags = ds->drv->get_phy_flags(ds, p->port);
1051 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
1053 /* If this PHY address is part of phys_mii_mask, which means
1054 * that we need to divert reads and writes to/from it, then we
1055 * want to bind this device using the slave MII bus created by
1056 * DSA to make that happen.
1058 if (!phy_is_fixed && phy_id >= 0 &&
1059 (ds->phys_mii_mask & (1 << phy_id))) {
1060 ret = dsa_slave_phy_connect(p, slave_dev, phy_id);
1062 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret);
1063 of_node_put(phy_dn);
1067 p->phy = of_phy_connect(slave_dev, phy_dn,
1068 dsa_slave_adjust_link,
1073 of_node_put(phy_dn);
1076 if (p->phy && phy_is_fixed)
1077 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
1079 /* We could not connect to a designated PHY, so use the switch internal
1083 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
1085 netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret);
1089 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
1090 p->phy->addr, p->phy->drv->name);
1096 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1097 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1098 struct netdev_queue *txq,
1101 lockdep_set_class(&txq->_xmit_lock,
1102 &dsa_slave_netdev_xmit_lock_key);
1105 int dsa_slave_suspend(struct net_device *slave_dev)
1107 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1109 if (!netif_running(slave_dev))
1112 netif_device_detach(slave_dev);
1119 phy_suspend(p->phy);
1125 int dsa_slave_resume(struct net_device *slave_dev)
1127 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1129 if (!netif_running(slave_dev))
1132 netif_device_attach(slave_dev);
1142 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1143 int port, char *name)
1145 struct net_device *master = ds->dst->master_netdev;
1146 struct net_device *slave_dev;
1147 struct dsa_slave_priv *p;
1150 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1151 NET_NAME_UNKNOWN, ether_setup);
1152 if (slave_dev == NULL)
1155 slave_dev->features = master->vlan_features;
1156 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1157 eth_hw_addr_inherit(slave_dev, master);
1158 slave_dev->priv_flags |= IFF_NO_QUEUE;
1159 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1160 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1161 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1163 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1166 SET_NETDEV_DEV(slave_dev, parent);
1167 slave_dev->dev.of_node = ds->pd->port_dn[port];
1168 slave_dev->vlan_features = master->vlan_features;
1170 p = netdev_priv(slave_dev);
1175 switch (ds->dst->tag_protocol) {
1176 #ifdef CONFIG_NET_DSA_TAG_DSA
1177 case DSA_TAG_PROTO_DSA:
1178 p->xmit = dsa_netdev_ops.xmit;
1181 #ifdef CONFIG_NET_DSA_TAG_EDSA
1182 case DSA_TAG_PROTO_EDSA:
1183 p->xmit = edsa_netdev_ops.xmit;
1186 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1187 case DSA_TAG_PROTO_TRAILER:
1188 p->xmit = trailer_netdev_ops.xmit;
1191 #ifdef CONFIG_NET_DSA_TAG_BRCM
1192 case DSA_TAG_PROTO_BRCM:
1193 p->xmit = brcm_netdev_ops.xmit;
1197 p->xmit = dsa_slave_notag_xmit;
1205 ret = dsa_slave_phy_setup(p, slave_dev);
1207 netdev_err(master, "error %d setting up slave phy\n", ret);
1208 free_netdev(slave_dev);
1212 ds->ports[port] = slave_dev;
1213 ret = register_netdev(slave_dev);
1215 netdev_err(master, "error %d registering interface %s\n",
1216 ret, slave_dev->name);
1217 phy_disconnect(p->phy);
1218 ds->ports[port] = NULL;
1219 free_netdev(slave_dev);
1223 netif_carrier_off(slave_dev);
1228 static bool dsa_slave_dev_check(struct net_device *dev)
1230 return dev->netdev_ops == &dsa_slave_netdev_ops;
1233 static int dsa_slave_master_changed(struct net_device *dev)
1235 struct net_device *master = netdev_master_upper_dev_get(dev);
1236 struct dsa_slave_priv *p = netdev_priv(dev);
1239 if (master && master->rtnl_link_ops &&
1240 !strcmp(master->rtnl_link_ops->kind, "bridge"))
1241 err = dsa_slave_bridge_port_join(dev, master);
1242 else if (dsa_port_is_bridged(p))
1243 err = dsa_slave_bridge_port_leave(dev);
1248 int dsa_slave_netdevice_event(struct notifier_block *unused,
1249 unsigned long event, void *ptr)
1251 struct net_device *dev;
1255 case NETDEV_CHANGEUPPER:
1256 dev = netdev_notifier_info_to_dev(ptr);
1257 if (!dsa_slave_dev_check(dev))
1260 err = dsa_slave_master_changed(dev);
1261 if (err && err != -EOPNOTSUPP)
1262 netdev_warn(dev, "failed to reflect master change\n");