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[mirror_ubuntu-focal-kernel.git] / net / dsa / slave.c
1 /*
2 * net/dsa/slave.c - Slave device handling
3 * Copyright (c) 2008-2009 Marvell Semiconductor
4 *
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.
9 */
10
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/phylink.h>
17 #include <linux/of_net.h>
18 #include <linux/of_mdio.h>
19 #include <linux/mdio.h>
20 #include <net/rtnetlink.h>
21 #include <net/pkt_cls.h>
22 #include <net/tc_act/tc_mirred.h>
23 #include <linux/if_bridge.h>
24 #include <linux/netpoll.h>
25 #include <linux/ptp_classify.h>
26
27 #include "dsa_priv.h"
28
29 static bool dsa_slave_dev_check(struct net_device *dev);
30
31 /* slave mii_bus handling ***************************************************/
32 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
33 {
34 struct dsa_switch *ds = bus->priv;
35
36 if (ds->phys_mii_mask & (1 << addr))
37 return ds->ops->phy_read(ds, addr, reg);
38
39 return 0xffff;
40 }
41
42 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
43 {
44 struct dsa_switch *ds = bus->priv;
45
46 if (ds->phys_mii_mask & (1 << addr))
47 return ds->ops->phy_write(ds, addr, reg, val);
48
49 return 0;
50 }
51
52 void dsa_slave_mii_bus_init(struct dsa_switch *ds)
53 {
54 ds->slave_mii_bus->priv = (void *)ds;
55 ds->slave_mii_bus->name = "dsa slave smi";
56 ds->slave_mii_bus->read = dsa_slave_phy_read;
57 ds->slave_mii_bus->write = dsa_slave_phy_write;
58 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
59 ds->dst->index, ds->index);
60 ds->slave_mii_bus->parent = ds->dev;
61 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
62 }
63
64
65 /* slave device handling ****************************************************/
66 static int dsa_slave_get_iflink(const struct net_device *dev)
67 {
68 return dsa_slave_to_master(dev)->ifindex;
69 }
70
71 static int dsa_slave_open(struct net_device *dev)
72 {
73 struct net_device *master = dsa_slave_to_master(dev);
74 struct dsa_port *dp = dsa_slave_to_port(dev);
75 int err;
76
77 if (!(master->flags & IFF_UP))
78 return -ENETDOWN;
79
80 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
81 err = dev_uc_add(master, dev->dev_addr);
82 if (err < 0)
83 goto out;
84 }
85
86 if (dev->flags & IFF_ALLMULTI) {
87 err = dev_set_allmulti(master, 1);
88 if (err < 0)
89 goto del_unicast;
90 }
91 if (dev->flags & IFF_PROMISC) {
92 err = dev_set_promiscuity(master, 1);
93 if (err < 0)
94 goto clear_allmulti;
95 }
96
97 err = dsa_port_enable(dp, dev->phydev);
98 if (err)
99 goto clear_promisc;
100
101 phylink_start(dp->pl);
102
103 return 0;
104
105 clear_promisc:
106 if (dev->flags & IFF_PROMISC)
107 dev_set_promiscuity(master, -1);
108 clear_allmulti:
109 if (dev->flags & IFF_ALLMULTI)
110 dev_set_allmulti(master, -1);
111 del_unicast:
112 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
113 dev_uc_del(master, dev->dev_addr);
114 out:
115 return err;
116 }
117
118 static int dsa_slave_close(struct net_device *dev)
119 {
120 struct net_device *master = dsa_slave_to_master(dev);
121 struct dsa_port *dp = dsa_slave_to_port(dev);
122
123 phylink_stop(dp->pl);
124
125 dsa_port_disable(dp, dev->phydev);
126
127 dev_mc_unsync(master, dev);
128 dev_uc_unsync(master, dev);
129 if (dev->flags & IFF_ALLMULTI)
130 dev_set_allmulti(master, -1);
131 if (dev->flags & IFF_PROMISC)
132 dev_set_promiscuity(master, -1);
133
134 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
135 dev_uc_del(master, dev->dev_addr);
136
137 return 0;
138 }
139
140 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
141 {
142 struct net_device *master = dsa_slave_to_master(dev);
143
144 if (change & IFF_ALLMULTI)
145 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
146 if (change & IFF_PROMISC)
147 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
148 }
149
150 static void dsa_slave_set_rx_mode(struct net_device *dev)
151 {
152 struct net_device *master = dsa_slave_to_master(dev);
153
154 dev_mc_sync(master, dev);
155 dev_uc_sync(master, dev);
156 }
157
158 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
159 {
160 struct net_device *master = dsa_slave_to_master(dev);
161 struct sockaddr *addr = a;
162 int err;
163
164 if (!is_valid_ether_addr(addr->sa_data))
165 return -EADDRNOTAVAIL;
166
167 if (!(dev->flags & IFF_UP))
168 goto out;
169
170 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
171 err = dev_uc_add(master, addr->sa_data);
172 if (err < 0)
173 return err;
174 }
175
176 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
177 dev_uc_del(master, dev->dev_addr);
178
179 out:
180 ether_addr_copy(dev->dev_addr, addr->sa_data);
181
182 return 0;
183 }
184
185 struct dsa_slave_dump_ctx {
186 struct net_device *dev;
187 struct sk_buff *skb;
188 struct netlink_callback *cb;
189 int idx;
190 };
191
192 static int
193 dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid,
194 bool is_static, void *data)
195 {
196 struct dsa_slave_dump_ctx *dump = data;
197 u32 portid = NETLINK_CB(dump->cb->skb).portid;
198 u32 seq = dump->cb->nlh->nlmsg_seq;
199 struct nlmsghdr *nlh;
200 struct ndmsg *ndm;
201
202 if (dump->idx < dump->cb->args[2])
203 goto skip;
204
205 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
206 sizeof(*ndm), NLM_F_MULTI);
207 if (!nlh)
208 return -EMSGSIZE;
209
210 ndm = nlmsg_data(nlh);
211 ndm->ndm_family = AF_BRIDGE;
212 ndm->ndm_pad1 = 0;
213 ndm->ndm_pad2 = 0;
214 ndm->ndm_flags = NTF_SELF;
215 ndm->ndm_type = 0;
216 ndm->ndm_ifindex = dump->dev->ifindex;
217 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
218
219 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
220 goto nla_put_failure;
221
222 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
223 goto nla_put_failure;
224
225 nlmsg_end(dump->skb, nlh);
226
227 skip:
228 dump->idx++;
229 return 0;
230
231 nla_put_failure:
232 nlmsg_cancel(dump->skb, nlh);
233 return -EMSGSIZE;
234 }
235
236 static int
237 dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
238 struct net_device *dev, struct net_device *filter_dev,
239 int *idx)
240 {
241 struct dsa_port *dp = dsa_slave_to_port(dev);
242 struct dsa_slave_dump_ctx dump = {
243 .dev = dev,
244 .skb = skb,
245 .cb = cb,
246 .idx = *idx,
247 };
248 int err;
249
250 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump);
251 *idx = dump.idx;
252
253 return err;
254 }
255
256 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
257 {
258 struct dsa_slave_priv *p = netdev_priv(dev);
259 struct dsa_switch *ds = p->dp->ds;
260 int port = p->dp->index;
261
262 /* Pass through to switch driver if it supports timestamping */
263 switch (cmd) {
264 case SIOCGHWTSTAMP:
265 if (ds->ops->port_hwtstamp_get)
266 return ds->ops->port_hwtstamp_get(ds, port, ifr);
267 break;
268 case SIOCSHWTSTAMP:
269 if (ds->ops->port_hwtstamp_set)
270 return ds->ops->port_hwtstamp_set(ds, port, ifr);
271 break;
272 }
273
274 return phylink_mii_ioctl(p->dp->pl, ifr, cmd);
275 }
276
277 static int dsa_slave_port_attr_set(struct net_device *dev,
278 const struct switchdev_attr *attr,
279 struct switchdev_trans *trans)
280 {
281 struct dsa_port *dp = dsa_slave_to_port(dev);
282 int ret;
283
284 switch (attr->id) {
285 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
286 ret = dsa_port_set_state(dp, attr->u.stp_state, trans);
287 break;
288 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
289 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
290 trans);
291 break;
292 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
293 ret = dsa_port_ageing_time(dp, attr->u.ageing_time, trans);
294 break;
295 default:
296 ret = -EOPNOTSUPP;
297 break;
298 }
299
300 return ret;
301 }
302
303 static int dsa_slave_port_obj_add(struct net_device *dev,
304 const struct switchdev_obj *obj,
305 struct switchdev_trans *trans)
306 {
307 struct dsa_port *dp = dsa_slave_to_port(dev);
308 int err;
309
310 /* For the prepare phase, ensure the full set of changes is feasable in
311 * one go in order to signal a failure properly. If an operation is not
312 * supported, return -EOPNOTSUPP.
313 */
314
315 switch (obj->id) {
316 case SWITCHDEV_OBJ_ID_PORT_MDB:
317 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans);
318 break;
319 case SWITCHDEV_OBJ_ID_HOST_MDB:
320 /* DSA can directly translate this to a normal MDB add,
321 * but on the CPU port.
322 */
323 err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj),
324 trans);
325 break;
326 case SWITCHDEV_OBJ_ID_PORT_VLAN:
327 err = dsa_port_vlan_add(dp, SWITCHDEV_OBJ_PORT_VLAN(obj),
328 trans);
329 break;
330 default:
331 err = -EOPNOTSUPP;
332 break;
333 }
334
335 return err;
336 }
337
338 static int dsa_slave_port_obj_del(struct net_device *dev,
339 const struct switchdev_obj *obj)
340 {
341 struct dsa_port *dp = dsa_slave_to_port(dev);
342 int err;
343
344 switch (obj->id) {
345 case SWITCHDEV_OBJ_ID_PORT_MDB:
346 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
347 break;
348 case SWITCHDEV_OBJ_ID_HOST_MDB:
349 /* DSA can directly translate this to a normal MDB add,
350 * but on the CPU port.
351 */
352 err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj));
353 break;
354 case SWITCHDEV_OBJ_ID_PORT_VLAN:
355 err = dsa_port_vlan_del(dp, SWITCHDEV_OBJ_PORT_VLAN(obj));
356 break;
357 default:
358 err = -EOPNOTSUPP;
359 break;
360 }
361
362 return err;
363 }
364
365 static int dsa_slave_port_attr_get(struct net_device *dev,
366 struct switchdev_attr *attr)
367 {
368 struct dsa_port *dp = dsa_slave_to_port(dev);
369 struct dsa_switch *ds = dp->ds;
370 struct dsa_switch_tree *dst = ds->dst;
371
372 switch (attr->id) {
373 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
374 attr->u.ppid.id_len = sizeof(dst->index);
375 memcpy(&attr->u.ppid.id, &dst->index, attr->u.ppid.id_len);
376 break;
377 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT:
378 attr->u.brport_flags_support = 0;
379 break;
380 default:
381 return -EOPNOTSUPP;
382 }
383
384 return 0;
385 }
386
387 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
388 struct sk_buff *skb)
389 {
390 #ifdef CONFIG_NET_POLL_CONTROLLER
391 struct dsa_slave_priv *p = netdev_priv(dev);
392
393 if (p->netpoll)
394 netpoll_send_skb(p->netpoll, skb);
395 #else
396 BUG();
397 #endif
398 return NETDEV_TX_OK;
399 }
400
401 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
402 struct sk_buff *skb)
403 {
404 struct dsa_switch *ds = p->dp->ds;
405 struct sk_buff *clone;
406 unsigned int type;
407
408 type = ptp_classify_raw(skb);
409 if (type == PTP_CLASS_NONE)
410 return;
411
412 if (!ds->ops->port_txtstamp)
413 return;
414
415 clone = skb_clone_sk(skb);
416 if (!clone)
417 return;
418
419 if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type))
420 return;
421
422 kfree_skb(clone);
423 }
424
425 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
426 {
427 struct dsa_slave_priv *p = netdev_priv(dev);
428 struct pcpu_sw_netstats *s;
429 struct sk_buff *nskb;
430
431 s = this_cpu_ptr(p->stats64);
432 u64_stats_update_begin(&s->syncp);
433 s->tx_packets++;
434 s->tx_bytes += skb->len;
435 u64_stats_update_end(&s->syncp);
436
437 /* Identify PTP protocol packets, clone them, and pass them to the
438 * switch driver
439 */
440 dsa_skb_tx_timestamp(p, skb);
441
442 /* Transmit function may have to reallocate the original SKB,
443 * in which case it must have freed it. Only free it here on error.
444 */
445 nskb = p->xmit(skb, dev);
446 if (!nskb) {
447 kfree_skb(skb);
448 return NETDEV_TX_OK;
449 }
450
451 /* SKB for netpoll still need to be mangled with the protocol-specific
452 * tag to be successfully transmitted
453 */
454 if (unlikely(netpoll_tx_running(dev)))
455 return dsa_slave_netpoll_send_skb(dev, nskb);
456
457 /* Queue the SKB for transmission on the parent interface, but
458 * do not modify its EtherType
459 */
460 nskb->dev = dsa_slave_to_master(dev);
461 dev_queue_xmit(nskb);
462
463 return NETDEV_TX_OK;
464 }
465
466 /* ethtool operations *******************************************************/
467
468 static void dsa_slave_get_drvinfo(struct net_device *dev,
469 struct ethtool_drvinfo *drvinfo)
470 {
471 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
472 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
473 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
474 }
475
476 static int dsa_slave_get_regs_len(struct net_device *dev)
477 {
478 struct dsa_port *dp = dsa_slave_to_port(dev);
479 struct dsa_switch *ds = dp->ds;
480
481 if (ds->ops->get_regs_len)
482 return ds->ops->get_regs_len(ds, dp->index);
483
484 return -EOPNOTSUPP;
485 }
486
487 static void
488 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
489 {
490 struct dsa_port *dp = dsa_slave_to_port(dev);
491 struct dsa_switch *ds = dp->ds;
492
493 if (ds->ops->get_regs)
494 ds->ops->get_regs(ds, dp->index, regs, _p);
495 }
496
497 static int dsa_slave_nway_reset(struct net_device *dev)
498 {
499 struct dsa_port *dp = dsa_slave_to_port(dev);
500
501 return phylink_ethtool_nway_reset(dp->pl);
502 }
503
504 static int dsa_slave_get_eeprom_len(struct net_device *dev)
505 {
506 struct dsa_port *dp = dsa_slave_to_port(dev);
507 struct dsa_switch *ds = dp->ds;
508
509 if (ds->cd && ds->cd->eeprom_len)
510 return ds->cd->eeprom_len;
511
512 if (ds->ops->get_eeprom_len)
513 return ds->ops->get_eeprom_len(ds);
514
515 return 0;
516 }
517
518 static int dsa_slave_get_eeprom(struct net_device *dev,
519 struct ethtool_eeprom *eeprom, u8 *data)
520 {
521 struct dsa_port *dp = dsa_slave_to_port(dev);
522 struct dsa_switch *ds = dp->ds;
523
524 if (ds->ops->get_eeprom)
525 return ds->ops->get_eeprom(ds, eeprom, data);
526
527 return -EOPNOTSUPP;
528 }
529
530 static int dsa_slave_set_eeprom(struct net_device *dev,
531 struct ethtool_eeprom *eeprom, u8 *data)
532 {
533 struct dsa_port *dp = dsa_slave_to_port(dev);
534 struct dsa_switch *ds = dp->ds;
535
536 if (ds->ops->set_eeprom)
537 return ds->ops->set_eeprom(ds, eeprom, data);
538
539 return -EOPNOTSUPP;
540 }
541
542 static void dsa_slave_get_strings(struct net_device *dev,
543 uint32_t stringset, uint8_t *data)
544 {
545 struct dsa_port *dp = dsa_slave_to_port(dev);
546 struct dsa_switch *ds = dp->ds;
547
548 if (stringset == ETH_SS_STATS) {
549 int len = ETH_GSTRING_LEN;
550
551 strncpy(data, "tx_packets", len);
552 strncpy(data + len, "tx_bytes", len);
553 strncpy(data + 2 * len, "rx_packets", len);
554 strncpy(data + 3 * len, "rx_bytes", len);
555 if (ds->ops->get_strings)
556 ds->ops->get_strings(ds, dp->index, stringset,
557 data + 4 * len);
558 }
559 }
560
561 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
562 struct ethtool_stats *stats,
563 uint64_t *data)
564 {
565 struct dsa_port *dp = dsa_slave_to_port(dev);
566 struct dsa_slave_priv *p = netdev_priv(dev);
567 struct dsa_switch *ds = dp->ds;
568 struct pcpu_sw_netstats *s;
569 unsigned int start;
570 int i;
571
572 for_each_possible_cpu(i) {
573 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
574
575 s = per_cpu_ptr(p->stats64, i);
576 do {
577 start = u64_stats_fetch_begin_irq(&s->syncp);
578 tx_packets = s->tx_packets;
579 tx_bytes = s->tx_bytes;
580 rx_packets = s->rx_packets;
581 rx_bytes = s->rx_bytes;
582 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
583 data[0] += tx_packets;
584 data[1] += tx_bytes;
585 data[2] += rx_packets;
586 data[3] += rx_bytes;
587 }
588 if (ds->ops->get_ethtool_stats)
589 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
590 }
591
592 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
593 {
594 struct dsa_port *dp = dsa_slave_to_port(dev);
595 struct dsa_switch *ds = dp->ds;
596
597 if (sset == ETH_SS_STATS) {
598 int count;
599
600 count = 4;
601 if (ds->ops->get_sset_count)
602 count += ds->ops->get_sset_count(ds, dp->index, sset);
603
604 return count;
605 }
606
607 return -EOPNOTSUPP;
608 }
609
610 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
611 {
612 struct dsa_port *dp = dsa_slave_to_port(dev);
613 struct dsa_switch *ds = dp->ds;
614
615 phylink_ethtool_get_wol(dp->pl, w);
616
617 if (ds->ops->get_wol)
618 ds->ops->get_wol(ds, dp->index, w);
619 }
620
621 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
622 {
623 struct dsa_port *dp = dsa_slave_to_port(dev);
624 struct dsa_switch *ds = dp->ds;
625 int ret = -EOPNOTSUPP;
626
627 phylink_ethtool_set_wol(dp->pl, w);
628
629 if (ds->ops->set_wol)
630 ret = ds->ops->set_wol(ds, dp->index, w);
631
632 return ret;
633 }
634
635 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
636 {
637 struct dsa_port *dp = dsa_slave_to_port(dev);
638 struct dsa_switch *ds = dp->ds;
639 int ret;
640
641 /* Port's PHY and MAC both need to be EEE capable */
642 if (!dev->phydev && !dp->pl)
643 return -ENODEV;
644
645 if (!ds->ops->set_mac_eee)
646 return -EOPNOTSUPP;
647
648 ret = ds->ops->set_mac_eee(ds, dp->index, e);
649 if (ret)
650 return ret;
651
652 return phylink_ethtool_set_eee(dp->pl, e);
653 }
654
655 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
656 {
657 struct dsa_port *dp = dsa_slave_to_port(dev);
658 struct dsa_switch *ds = dp->ds;
659 int ret;
660
661 /* Port's PHY and MAC both need to be EEE capable */
662 if (!dev->phydev && !dp->pl)
663 return -ENODEV;
664
665 if (!ds->ops->get_mac_eee)
666 return -EOPNOTSUPP;
667
668 ret = ds->ops->get_mac_eee(ds, dp->index, e);
669 if (ret)
670 return ret;
671
672 return phylink_ethtool_get_eee(dp->pl, e);
673 }
674
675 static int dsa_slave_get_link_ksettings(struct net_device *dev,
676 struct ethtool_link_ksettings *cmd)
677 {
678 struct dsa_port *dp = dsa_slave_to_port(dev);
679
680 return phylink_ethtool_ksettings_get(dp->pl, cmd);
681 }
682
683 static int dsa_slave_set_link_ksettings(struct net_device *dev,
684 const struct ethtool_link_ksettings *cmd)
685 {
686 struct dsa_port *dp = dsa_slave_to_port(dev);
687
688 return phylink_ethtool_ksettings_set(dp->pl, cmd);
689 }
690
691 #ifdef CONFIG_NET_POLL_CONTROLLER
692 static int dsa_slave_netpoll_setup(struct net_device *dev,
693 struct netpoll_info *ni)
694 {
695 struct net_device *master = dsa_slave_to_master(dev);
696 struct dsa_slave_priv *p = netdev_priv(dev);
697 struct netpoll *netpoll;
698 int err = 0;
699
700 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
701 if (!netpoll)
702 return -ENOMEM;
703
704 err = __netpoll_setup(netpoll, master);
705 if (err) {
706 kfree(netpoll);
707 goto out;
708 }
709
710 p->netpoll = netpoll;
711 out:
712 return err;
713 }
714
715 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
716 {
717 struct dsa_slave_priv *p = netdev_priv(dev);
718 struct netpoll *netpoll = p->netpoll;
719
720 if (!netpoll)
721 return;
722
723 p->netpoll = NULL;
724
725 __netpoll_free_async(netpoll);
726 }
727
728 static void dsa_slave_poll_controller(struct net_device *dev)
729 {
730 }
731 #endif
732
733 static int dsa_slave_get_phys_port_name(struct net_device *dev,
734 char *name, size_t len)
735 {
736 struct dsa_port *dp = dsa_slave_to_port(dev);
737
738 if (snprintf(name, len, "p%d", dp->index) >= len)
739 return -EINVAL;
740
741 return 0;
742 }
743
744 static struct dsa_mall_tc_entry *
745 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
746 {
747 struct dsa_slave_priv *p = netdev_priv(dev);
748 struct dsa_mall_tc_entry *mall_tc_entry;
749
750 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
751 if (mall_tc_entry->cookie == cookie)
752 return mall_tc_entry;
753
754 return NULL;
755 }
756
757 static int dsa_slave_add_cls_matchall(struct net_device *dev,
758 struct tc_cls_matchall_offload *cls,
759 bool ingress)
760 {
761 struct dsa_port *dp = dsa_slave_to_port(dev);
762 struct dsa_slave_priv *p = netdev_priv(dev);
763 struct dsa_mall_tc_entry *mall_tc_entry;
764 __be16 protocol = cls->common.protocol;
765 struct dsa_switch *ds = dp->ds;
766 struct net_device *to_dev;
767 const struct tc_action *a;
768 struct dsa_port *to_dp;
769 int err = -EOPNOTSUPP;
770 LIST_HEAD(actions);
771
772 if (!ds->ops->port_mirror_add)
773 return err;
774
775 if (!tcf_exts_has_one_action(cls->exts))
776 return err;
777
778 tcf_exts_to_list(cls->exts, &actions);
779 a = list_first_entry(&actions, struct tc_action, list);
780
781 if (is_tcf_mirred_egress_mirror(a) && protocol == htons(ETH_P_ALL)) {
782 struct dsa_mall_mirror_tc_entry *mirror;
783
784 to_dev = tcf_mirred_dev(a);
785 if (!to_dev)
786 return -EINVAL;
787
788 if (!dsa_slave_dev_check(to_dev))
789 return -EOPNOTSUPP;
790
791 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
792 if (!mall_tc_entry)
793 return -ENOMEM;
794
795 mall_tc_entry->cookie = cls->cookie;
796 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
797 mirror = &mall_tc_entry->mirror;
798
799 to_dp = dsa_slave_to_port(to_dev);
800
801 mirror->to_local_port = to_dp->index;
802 mirror->ingress = ingress;
803
804 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
805 if (err) {
806 kfree(mall_tc_entry);
807 return err;
808 }
809
810 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
811 }
812
813 return 0;
814 }
815
816 static void dsa_slave_del_cls_matchall(struct net_device *dev,
817 struct tc_cls_matchall_offload *cls)
818 {
819 struct dsa_port *dp = dsa_slave_to_port(dev);
820 struct dsa_mall_tc_entry *mall_tc_entry;
821 struct dsa_switch *ds = dp->ds;
822
823 if (!ds->ops->port_mirror_del)
824 return;
825
826 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
827 if (!mall_tc_entry)
828 return;
829
830 list_del(&mall_tc_entry->list);
831
832 switch (mall_tc_entry->type) {
833 case DSA_PORT_MALL_MIRROR:
834 ds->ops->port_mirror_del(ds, dp->index, &mall_tc_entry->mirror);
835 break;
836 default:
837 WARN_ON(1);
838 }
839
840 kfree(mall_tc_entry);
841 }
842
843 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
844 struct tc_cls_matchall_offload *cls,
845 bool ingress)
846 {
847 if (cls->common.chain_index)
848 return -EOPNOTSUPP;
849
850 switch (cls->command) {
851 case TC_CLSMATCHALL_REPLACE:
852 return dsa_slave_add_cls_matchall(dev, cls, ingress);
853 case TC_CLSMATCHALL_DESTROY:
854 dsa_slave_del_cls_matchall(dev, cls);
855 return 0;
856 default:
857 return -EOPNOTSUPP;
858 }
859 }
860
861 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
862 void *cb_priv, bool ingress)
863 {
864 struct net_device *dev = cb_priv;
865
866 if (!tc_can_offload(dev))
867 return -EOPNOTSUPP;
868
869 switch (type) {
870 case TC_SETUP_CLSMATCHALL:
871 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
872 default:
873 return -EOPNOTSUPP;
874 }
875 }
876
877 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
878 void *type_data, void *cb_priv)
879 {
880 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
881 }
882
883 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
884 void *type_data, void *cb_priv)
885 {
886 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
887 }
888
889 static int dsa_slave_setup_tc_block(struct net_device *dev,
890 struct tc_block_offload *f)
891 {
892 tc_setup_cb_t *cb;
893
894 if (f->binder_type == TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
895 cb = dsa_slave_setup_tc_block_cb_ig;
896 else if (f->binder_type == TCF_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
897 cb = dsa_slave_setup_tc_block_cb_eg;
898 else
899 return -EOPNOTSUPP;
900
901 switch (f->command) {
902 case TC_BLOCK_BIND:
903 return tcf_block_cb_register(f->block, cb, dev, dev, f->extack);
904 case TC_BLOCK_UNBIND:
905 tcf_block_cb_unregister(f->block, cb, dev);
906 return 0;
907 default:
908 return -EOPNOTSUPP;
909 }
910 }
911
912 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
913 void *type_data)
914 {
915 switch (type) {
916 case TC_SETUP_BLOCK:
917 return dsa_slave_setup_tc_block(dev, type_data);
918 default:
919 return -EOPNOTSUPP;
920 }
921 }
922
923 static void dsa_slave_get_stats64(struct net_device *dev,
924 struct rtnl_link_stats64 *stats)
925 {
926 struct dsa_slave_priv *p = netdev_priv(dev);
927 struct pcpu_sw_netstats *s;
928 unsigned int start;
929 int i;
930
931 netdev_stats_to_stats64(stats, &dev->stats);
932 for_each_possible_cpu(i) {
933 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
934
935 s = per_cpu_ptr(p->stats64, i);
936 do {
937 start = u64_stats_fetch_begin_irq(&s->syncp);
938 tx_packets = s->tx_packets;
939 tx_bytes = s->tx_bytes;
940 rx_packets = s->rx_packets;
941 rx_bytes = s->rx_bytes;
942 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
943
944 stats->tx_packets += tx_packets;
945 stats->tx_bytes += tx_bytes;
946 stats->rx_packets += rx_packets;
947 stats->rx_bytes += rx_bytes;
948 }
949 }
950
951 static int dsa_slave_get_rxnfc(struct net_device *dev,
952 struct ethtool_rxnfc *nfc, u32 *rule_locs)
953 {
954 struct dsa_port *dp = dsa_slave_to_port(dev);
955 struct dsa_switch *ds = dp->ds;
956
957 if (!ds->ops->get_rxnfc)
958 return -EOPNOTSUPP;
959
960 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
961 }
962
963 static int dsa_slave_set_rxnfc(struct net_device *dev,
964 struct ethtool_rxnfc *nfc)
965 {
966 struct dsa_port *dp = dsa_slave_to_port(dev);
967 struct dsa_switch *ds = dp->ds;
968
969 if (!ds->ops->set_rxnfc)
970 return -EOPNOTSUPP;
971
972 return ds->ops->set_rxnfc(ds, dp->index, nfc);
973 }
974
975 static int dsa_slave_get_ts_info(struct net_device *dev,
976 struct ethtool_ts_info *ts)
977 {
978 struct dsa_slave_priv *p = netdev_priv(dev);
979 struct dsa_switch *ds = p->dp->ds;
980
981 if (!ds->ops->get_ts_info)
982 return -EOPNOTSUPP;
983
984 return ds->ops->get_ts_info(ds, p->dp->index, ts);
985 }
986
987 static const struct ethtool_ops dsa_slave_ethtool_ops = {
988 .get_drvinfo = dsa_slave_get_drvinfo,
989 .get_regs_len = dsa_slave_get_regs_len,
990 .get_regs = dsa_slave_get_regs,
991 .nway_reset = dsa_slave_nway_reset,
992 .get_link = ethtool_op_get_link,
993 .get_eeprom_len = dsa_slave_get_eeprom_len,
994 .get_eeprom = dsa_slave_get_eeprom,
995 .set_eeprom = dsa_slave_set_eeprom,
996 .get_strings = dsa_slave_get_strings,
997 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
998 .get_sset_count = dsa_slave_get_sset_count,
999 .set_wol = dsa_slave_set_wol,
1000 .get_wol = dsa_slave_get_wol,
1001 .set_eee = dsa_slave_set_eee,
1002 .get_eee = dsa_slave_get_eee,
1003 .get_link_ksettings = dsa_slave_get_link_ksettings,
1004 .set_link_ksettings = dsa_slave_set_link_ksettings,
1005 .get_rxnfc = dsa_slave_get_rxnfc,
1006 .set_rxnfc = dsa_slave_set_rxnfc,
1007 .get_ts_info = dsa_slave_get_ts_info,
1008 };
1009
1010 /* legacy way, bypassing the bridge *****************************************/
1011 int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
1012 struct net_device *dev,
1013 const unsigned char *addr, u16 vid,
1014 u16 flags)
1015 {
1016 struct dsa_port *dp = dsa_slave_to_port(dev);
1017
1018 return dsa_port_fdb_add(dp, addr, vid);
1019 }
1020
1021 int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
1022 struct net_device *dev,
1023 const unsigned char *addr, u16 vid)
1024 {
1025 struct dsa_port *dp = dsa_slave_to_port(dev);
1026
1027 return dsa_port_fdb_del(dp, addr, vid);
1028 }
1029
1030 static const struct net_device_ops dsa_slave_netdev_ops = {
1031 .ndo_open = dsa_slave_open,
1032 .ndo_stop = dsa_slave_close,
1033 .ndo_start_xmit = dsa_slave_xmit,
1034 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
1035 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
1036 .ndo_set_mac_address = dsa_slave_set_mac_address,
1037 .ndo_fdb_add = dsa_legacy_fdb_add,
1038 .ndo_fdb_del = dsa_legacy_fdb_del,
1039 .ndo_fdb_dump = dsa_slave_fdb_dump,
1040 .ndo_do_ioctl = dsa_slave_ioctl,
1041 .ndo_get_iflink = dsa_slave_get_iflink,
1042 #ifdef CONFIG_NET_POLL_CONTROLLER
1043 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
1044 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
1045 .ndo_poll_controller = dsa_slave_poll_controller,
1046 #endif
1047 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
1048 .ndo_setup_tc = dsa_slave_setup_tc,
1049 .ndo_get_stats64 = dsa_slave_get_stats64,
1050 };
1051
1052 static const struct switchdev_ops dsa_slave_switchdev_ops = {
1053 .switchdev_port_attr_get = dsa_slave_port_attr_get,
1054 .switchdev_port_attr_set = dsa_slave_port_attr_set,
1055 .switchdev_port_obj_add = dsa_slave_port_obj_add,
1056 .switchdev_port_obj_del = dsa_slave_port_obj_del,
1057 };
1058
1059 static struct device_type dsa_type = {
1060 .name = "dsa",
1061 };
1062
1063 static void dsa_slave_phylink_validate(struct net_device *dev,
1064 unsigned long *supported,
1065 struct phylink_link_state *state)
1066 {
1067 struct dsa_port *dp = dsa_slave_to_port(dev);
1068 struct dsa_switch *ds = dp->ds;
1069
1070 if (!ds->ops->phylink_validate)
1071 return;
1072
1073 ds->ops->phylink_validate(ds, dp->index, supported, state);
1074 }
1075
1076 static int dsa_slave_phylink_mac_link_state(struct net_device *dev,
1077 struct phylink_link_state *state)
1078 {
1079 struct dsa_port *dp = dsa_slave_to_port(dev);
1080 struct dsa_switch *ds = dp->ds;
1081
1082 /* Only called for SGMII and 802.3z */
1083 if (!ds->ops->phylink_mac_link_state)
1084 return -EOPNOTSUPP;
1085
1086 return ds->ops->phylink_mac_link_state(ds, dp->index, state);
1087 }
1088
1089 static void dsa_slave_phylink_mac_config(struct net_device *dev,
1090 unsigned int mode,
1091 const struct phylink_link_state *state)
1092 {
1093 struct dsa_port *dp = dsa_slave_to_port(dev);
1094 struct dsa_switch *ds = dp->ds;
1095
1096 if (!ds->ops->phylink_mac_config)
1097 return;
1098
1099 ds->ops->phylink_mac_config(ds, dp->index, mode, state);
1100 }
1101
1102 static void dsa_slave_phylink_mac_an_restart(struct net_device *dev)
1103 {
1104 struct dsa_port *dp = dsa_slave_to_port(dev);
1105 struct dsa_switch *ds = dp->ds;
1106
1107 if (!ds->ops->phylink_mac_an_restart)
1108 return;
1109
1110 ds->ops->phylink_mac_an_restart(ds, dp->index);
1111 }
1112
1113 static void dsa_slave_phylink_mac_link_down(struct net_device *dev,
1114 unsigned int mode,
1115 phy_interface_t interface)
1116 {
1117 struct dsa_port *dp = dsa_slave_to_port(dev);
1118 struct dsa_switch *ds = dp->ds;
1119
1120 if (!ds->ops->phylink_mac_link_down) {
1121 if (ds->ops->adjust_link && dev->phydev)
1122 ds->ops->adjust_link(ds, dp->index, dev->phydev);
1123 return;
1124 }
1125
1126 ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface);
1127 }
1128
1129 static void dsa_slave_phylink_mac_link_up(struct net_device *dev,
1130 unsigned int mode,
1131 phy_interface_t interface,
1132 struct phy_device *phydev)
1133 {
1134 struct dsa_port *dp = dsa_slave_to_port(dev);
1135 struct dsa_switch *ds = dp->ds;
1136
1137 if (!ds->ops->phylink_mac_link_up) {
1138 if (ds->ops->adjust_link && dev->phydev)
1139 ds->ops->adjust_link(ds, dp->index, dev->phydev);
1140 return;
1141 }
1142
1143 ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev);
1144 }
1145
1146 static const struct phylink_mac_ops dsa_slave_phylink_mac_ops = {
1147 .validate = dsa_slave_phylink_validate,
1148 .mac_link_state = dsa_slave_phylink_mac_link_state,
1149 .mac_config = dsa_slave_phylink_mac_config,
1150 .mac_an_restart = dsa_slave_phylink_mac_an_restart,
1151 .mac_link_down = dsa_slave_phylink_mac_link_down,
1152 .mac_link_up = dsa_slave_phylink_mac_link_up,
1153 };
1154
1155 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
1156 {
1157 const struct dsa_port *dp = dsa_to_port(ds, port);
1158
1159 phylink_mac_change(dp->pl, up);
1160 }
1161 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
1162
1163 static void dsa_slave_phylink_fixed_state(struct net_device *dev,
1164 struct phylink_link_state *state)
1165 {
1166 struct dsa_port *dp = dsa_slave_to_port(dev);
1167 struct dsa_switch *ds = dp->ds;
1168
1169 /* No need to check that this operation is valid, the callback would
1170 * not be called if it was not.
1171 */
1172 ds->ops->phylink_fixed_state(ds, dp->index, state);
1173 }
1174
1175 /* slave device setup *******************************************************/
1176 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
1177 {
1178 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1179 struct dsa_switch *ds = dp->ds;
1180
1181 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
1182 if (!slave_dev->phydev) {
1183 netdev_err(slave_dev, "no phy at %d\n", addr);
1184 return -ENODEV;
1185 }
1186
1187 return phylink_connect_phy(dp->pl, slave_dev->phydev);
1188 }
1189
1190 static int dsa_slave_phy_setup(struct net_device *slave_dev)
1191 {
1192 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1193 struct device_node *port_dn = dp->dn;
1194 struct dsa_switch *ds = dp->ds;
1195 u32 phy_flags = 0;
1196 int mode, ret;
1197
1198 mode = of_get_phy_mode(port_dn);
1199 if (mode < 0)
1200 mode = PHY_INTERFACE_MODE_NA;
1201
1202 dp->pl = phylink_create(slave_dev, of_fwnode_handle(port_dn), mode,
1203 &dsa_slave_phylink_mac_ops);
1204 if (IS_ERR(dp->pl)) {
1205 netdev_err(slave_dev,
1206 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1207 return PTR_ERR(dp->pl);
1208 }
1209
1210 /* Register only if the switch provides such a callback, since this
1211 * callback takes precedence over polling the link GPIO in PHYLINK
1212 * (see phylink_get_fixed_state).
1213 */
1214 if (ds->ops->phylink_fixed_state)
1215 phylink_fixed_state_cb(dp->pl, dsa_slave_phylink_fixed_state);
1216
1217 if (ds->ops->get_phy_flags)
1218 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
1219
1220 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
1221 if (ret == -ENODEV) {
1222 /* We could not connect to a designated PHY or SFP, so use the
1223 * switch internal MDIO bus instead
1224 */
1225 ret = dsa_slave_phy_connect(slave_dev, dp->index);
1226 if (ret) {
1227 netdev_err(slave_dev,
1228 "failed to connect to port %d: %d\n",
1229 dp->index, ret);
1230 phylink_destroy(dp->pl);
1231 return ret;
1232 }
1233 }
1234
1235 return 0;
1236 }
1237
1238 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1239 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1240 struct netdev_queue *txq,
1241 void *_unused)
1242 {
1243 lockdep_set_class(&txq->_xmit_lock,
1244 &dsa_slave_netdev_xmit_lock_key);
1245 }
1246
1247 int dsa_slave_suspend(struct net_device *slave_dev)
1248 {
1249 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1250
1251 if (!netif_running(slave_dev))
1252 return 0;
1253
1254 netif_device_detach(slave_dev);
1255
1256 rtnl_lock();
1257 phylink_stop(dp->pl);
1258 rtnl_unlock();
1259
1260 return 0;
1261 }
1262
1263 int dsa_slave_resume(struct net_device *slave_dev)
1264 {
1265 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1266
1267 if (!netif_running(slave_dev))
1268 return 0;
1269
1270 netif_device_attach(slave_dev);
1271
1272 rtnl_lock();
1273 phylink_start(dp->pl);
1274 rtnl_unlock();
1275
1276 return 0;
1277 }
1278
1279 static void dsa_slave_notify(struct net_device *dev, unsigned long val)
1280 {
1281 struct net_device *master = dsa_slave_to_master(dev);
1282 struct dsa_port *dp = dsa_slave_to_port(dev);
1283 struct dsa_notifier_register_info rinfo = {
1284 .switch_number = dp->ds->index,
1285 .port_number = dp->index,
1286 .master = master,
1287 .info.dev = dev,
1288 };
1289
1290 call_dsa_notifiers(val, dev, &rinfo.info);
1291 }
1292
1293 int dsa_slave_create(struct dsa_port *port)
1294 {
1295 const struct dsa_port *cpu_dp = port->cpu_dp;
1296 struct net_device *master = cpu_dp->master;
1297 struct dsa_switch *ds = port->ds;
1298 const char *name = port->name;
1299 struct net_device *slave_dev;
1300 struct dsa_slave_priv *p;
1301 int ret;
1302
1303 if (!ds->num_tx_queues)
1304 ds->num_tx_queues = 1;
1305
1306 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
1307 NET_NAME_UNKNOWN, ether_setup,
1308 ds->num_tx_queues, 1);
1309 if (slave_dev == NULL)
1310 return -ENOMEM;
1311
1312 slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
1313 slave_dev->hw_features |= NETIF_F_HW_TC;
1314 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1315 eth_hw_addr_inherit(slave_dev, master);
1316 slave_dev->priv_flags |= IFF_NO_QUEUE;
1317 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1318 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1319 slave_dev->min_mtu = 0;
1320 slave_dev->max_mtu = ETH_MAX_MTU;
1321 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1322
1323 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1324 NULL);
1325
1326 SET_NETDEV_DEV(slave_dev, port->ds->dev);
1327 slave_dev->dev.of_node = port->dn;
1328 slave_dev->vlan_features = master->vlan_features;
1329
1330 p = netdev_priv(slave_dev);
1331 p->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1332 if (!p->stats64) {
1333 free_netdev(slave_dev);
1334 return -ENOMEM;
1335 }
1336 p->dp = port;
1337 INIT_LIST_HEAD(&p->mall_tc_list);
1338 p->xmit = cpu_dp->tag_ops->xmit;
1339 port->slave = slave_dev;
1340
1341 netif_carrier_off(slave_dev);
1342
1343 ret = dsa_slave_phy_setup(slave_dev);
1344 if (ret) {
1345 netdev_err(master, "error %d setting up slave phy\n", ret);
1346 goto out_free;
1347 }
1348
1349 dsa_slave_notify(slave_dev, DSA_PORT_REGISTER);
1350
1351 ret = register_netdev(slave_dev);
1352 if (ret) {
1353 netdev_err(master, "error %d registering interface %s\n",
1354 ret, slave_dev->name);
1355 goto out_phy;
1356 }
1357
1358 return 0;
1359
1360 out_phy:
1361 rtnl_lock();
1362 phylink_disconnect_phy(p->dp->pl);
1363 rtnl_unlock();
1364 phylink_destroy(p->dp->pl);
1365 out_free:
1366 free_percpu(p->stats64);
1367 free_netdev(slave_dev);
1368 port->slave = NULL;
1369 return ret;
1370 }
1371
1372 void dsa_slave_destroy(struct net_device *slave_dev)
1373 {
1374 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1375 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1376
1377 netif_carrier_off(slave_dev);
1378 rtnl_lock();
1379 phylink_disconnect_phy(dp->pl);
1380 rtnl_unlock();
1381
1382 dsa_slave_notify(slave_dev, DSA_PORT_UNREGISTER);
1383 unregister_netdev(slave_dev);
1384 phylink_destroy(dp->pl);
1385 free_percpu(p->stats64);
1386 free_netdev(slave_dev);
1387 }
1388
1389 static bool dsa_slave_dev_check(struct net_device *dev)
1390 {
1391 return dev->netdev_ops == &dsa_slave_netdev_ops;
1392 }
1393
1394 static int dsa_slave_changeupper(struct net_device *dev,
1395 struct netdev_notifier_changeupper_info *info)
1396 {
1397 struct dsa_port *dp = dsa_slave_to_port(dev);
1398 int err = NOTIFY_DONE;
1399
1400 if (netif_is_bridge_master(info->upper_dev)) {
1401 if (info->linking) {
1402 err = dsa_port_bridge_join(dp, info->upper_dev);
1403 err = notifier_from_errno(err);
1404 } else {
1405 dsa_port_bridge_leave(dp, info->upper_dev);
1406 err = NOTIFY_OK;
1407 }
1408 }
1409
1410 return err;
1411 }
1412
1413 static int dsa_slave_netdevice_event(struct notifier_block *nb,
1414 unsigned long event, void *ptr)
1415 {
1416 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1417
1418 if (!dsa_slave_dev_check(dev))
1419 return NOTIFY_DONE;
1420
1421 if (event == NETDEV_CHANGEUPPER)
1422 return dsa_slave_changeupper(dev, ptr);
1423
1424 return NOTIFY_DONE;
1425 }
1426
1427 struct dsa_switchdev_event_work {
1428 struct work_struct work;
1429 struct switchdev_notifier_fdb_info fdb_info;
1430 struct net_device *dev;
1431 unsigned long event;
1432 };
1433
1434 static void dsa_slave_switchdev_event_work(struct work_struct *work)
1435 {
1436 struct dsa_switchdev_event_work *switchdev_work =
1437 container_of(work, struct dsa_switchdev_event_work, work);
1438 struct net_device *dev = switchdev_work->dev;
1439 struct switchdev_notifier_fdb_info *fdb_info;
1440 struct dsa_port *dp = dsa_slave_to_port(dev);
1441 int err;
1442
1443 rtnl_lock();
1444 switch (switchdev_work->event) {
1445 case SWITCHDEV_FDB_ADD_TO_DEVICE:
1446 fdb_info = &switchdev_work->fdb_info;
1447 if (!fdb_info->added_by_user)
1448 break;
1449
1450 err = dsa_port_fdb_add(dp, fdb_info->addr, fdb_info->vid);
1451 if (err) {
1452 netdev_dbg(dev, "fdb add failed err=%d\n", err);
1453 break;
1454 }
1455 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, dev,
1456 &fdb_info->info);
1457 break;
1458
1459 case SWITCHDEV_FDB_DEL_TO_DEVICE:
1460 fdb_info = &switchdev_work->fdb_info;
1461 if (!fdb_info->added_by_user)
1462 break;
1463
1464 err = dsa_port_fdb_del(dp, fdb_info->addr, fdb_info->vid);
1465 if (err) {
1466 netdev_dbg(dev, "fdb del failed err=%d\n", err);
1467 dev_close(dev);
1468 }
1469 break;
1470 }
1471 rtnl_unlock();
1472
1473 kfree(switchdev_work->fdb_info.addr);
1474 kfree(switchdev_work);
1475 dev_put(dev);
1476 }
1477
1478 static int
1479 dsa_slave_switchdev_fdb_work_init(struct dsa_switchdev_event_work *
1480 switchdev_work,
1481 const struct switchdev_notifier_fdb_info *
1482 fdb_info)
1483 {
1484 memcpy(&switchdev_work->fdb_info, fdb_info,
1485 sizeof(switchdev_work->fdb_info));
1486 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
1487 if (!switchdev_work->fdb_info.addr)
1488 return -ENOMEM;
1489 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
1490 fdb_info->addr);
1491 return 0;
1492 }
1493
1494 /* Called under rcu_read_lock() */
1495 static int dsa_slave_switchdev_event(struct notifier_block *unused,
1496 unsigned long event, void *ptr)
1497 {
1498 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
1499 struct dsa_switchdev_event_work *switchdev_work;
1500
1501 if (!dsa_slave_dev_check(dev))
1502 return NOTIFY_DONE;
1503
1504 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
1505 if (!switchdev_work)
1506 return NOTIFY_BAD;
1507
1508 INIT_WORK(&switchdev_work->work,
1509 dsa_slave_switchdev_event_work);
1510 switchdev_work->dev = dev;
1511 switchdev_work->event = event;
1512
1513 switch (event) {
1514 case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */
1515 case SWITCHDEV_FDB_DEL_TO_DEVICE:
1516 if (dsa_slave_switchdev_fdb_work_init(switchdev_work, ptr))
1517 goto err_fdb_work_init;
1518 dev_hold(dev);
1519 break;
1520 default:
1521 kfree(switchdev_work);
1522 return NOTIFY_DONE;
1523 }
1524
1525 dsa_schedule_work(&switchdev_work->work);
1526 return NOTIFY_OK;
1527
1528 err_fdb_work_init:
1529 kfree(switchdev_work);
1530 return NOTIFY_BAD;
1531 }
1532
1533 static struct notifier_block dsa_slave_nb __read_mostly = {
1534 .notifier_call = dsa_slave_netdevice_event,
1535 };
1536
1537 static struct notifier_block dsa_slave_switchdev_notifier = {
1538 .notifier_call = dsa_slave_switchdev_event,
1539 };
1540
1541 int dsa_slave_register_notifier(void)
1542 {
1543 int err;
1544
1545 err = register_netdevice_notifier(&dsa_slave_nb);
1546 if (err)
1547 return err;
1548
1549 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
1550 if (err)
1551 goto err_switchdev_nb;
1552
1553 return 0;
1554
1555 err_switchdev_nb:
1556 unregister_netdevice_notifier(&dsa_slave_nb);
1557 return err;
1558 }
1559
1560 void dsa_slave_unregister_notifier(void)
1561 {
1562 int err;
1563
1564 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
1565 if (err)
1566 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
1567
1568 err = unregister_netdevice_notifier(&dsa_slave_nb);
1569 if (err)
1570 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
1571 }
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