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net: dsa: Do not suspend/resume closed slave_dev
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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/of_net.h>
17 #include <linux/of_mdio.h>
18 #include <linux/mdio.h>
19 #include <net/rtnetlink.h>
20 #include <net/pkt_cls.h>
21 #include <net/tc_act/tc_mirred.h>
22 #include <linux/if_bridge.h>
23 #include <linux/netpoll.h>
24
25 #include "dsa_priv.h"
26
27 static bool dsa_slave_dev_check(struct net_device *dev);
28
29 /* slave mii_bus handling ***************************************************/
30 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
31 {
32 struct dsa_switch *ds = bus->priv;
33
34 if (ds->phys_mii_mask & (1 << addr))
35 return ds->ops->phy_read(ds, addr, reg);
36
37 return 0xffff;
38 }
39
40 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
41 {
42 struct dsa_switch *ds = bus->priv;
43
44 if (ds->phys_mii_mask & (1 << addr))
45 return ds->ops->phy_write(ds, addr, reg, val);
46
47 return 0;
48 }
49
50 void dsa_slave_mii_bus_init(struct dsa_switch *ds)
51 {
52 ds->slave_mii_bus->priv = (void *)ds;
53 ds->slave_mii_bus->name = "dsa slave smi";
54 ds->slave_mii_bus->read = dsa_slave_phy_read;
55 ds->slave_mii_bus->write = dsa_slave_phy_write;
56 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
57 ds->dst->index, ds->index);
58 ds->slave_mii_bus->parent = ds->dev;
59 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
60 }
61
62
63 /* slave device handling ****************************************************/
64 static int dsa_slave_get_iflink(const struct net_device *dev)
65 {
66 return dsa_slave_to_master(dev)->ifindex;
67 }
68
69 static int dsa_slave_open(struct net_device *dev)
70 {
71 struct net_device *master = dsa_slave_to_master(dev);
72 struct dsa_port *dp = dsa_slave_to_port(dev);
73 int err;
74
75 if (!(master->flags & IFF_UP))
76 return -ENETDOWN;
77
78 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
79 err = dev_uc_add(master, dev->dev_addr);
80 if (err < 0)
81 goto out;
82 }
83
84 if (dev->flags & IFF_ALLMULTI) {
85 err = dev_set_allmulti(master, 1);
86 if (err < 0)
87 goto del_unicast;
88 }
89 if (dev->flags & IFF_PROMISC) {
90 err = dev_set_promiscuity(master, 1);
91 if (err < 0)
92 goto clear_allmulti;
93 }
94
95 err = dsa_port_enable(dp, dev->phydev);
96 if (err)
97 goto clear_promisc;
98
99 if (dev->phydev)
100 phy_start(dev->phydev);
101
102 return 0;
103
104 clear_promisc:
105 if (dev->flags & IFF_PROMISC)
106 dev_set_promiscuity(master, -1);
107 clear_allmulti:
108 if (dev->flags & IFF_ALLMULTI)
109 dev_set_allmulti(master, -1);
110 del_unicast:
111 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
112 dev_uc_del(master, dev->dev_addr);
113 out:
114 return err;
115 }
116
117 static int dsa_slave_close(struct net_device *dev)
118 {
119 struct net_device *master = dsa_slave_to_master(dev);
120 struct dsa_port *dp = dsa_slave_to_port(dev);
121
122 if (dev->phydev)
123 phy_stop(dev->phydev);
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 if (!dev->phydev)
259 return -ENODEV;
260
261 return phy_mii_ioctl(dev->phydev, ifr, cmd);
262 }
263
264 static int dsa_slave_port_attr_set(struct net_device *dev,
265 const struct switchdev_attr *attr,
266 struct switchdev_trans *trans)
267 {
268 struct dsa_port *dp = dsa_slave_to_port(dev);
269 int ret;
270
271 switch (attr->id) {
272 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
273 ret = dsa_port_set_state(dp, attr->u.stp_state, trans);
274 break;
275 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
276 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
277 trans);
278 break;
279 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
280 ret = dsa_port_ageing_time(dp, attr->u.ageing_time, trans);
281 break;
282 default:
283 ret = -EOPNOTSUPP;
284 break;
285 }
286
287 return ret;
288 }
289
290 static int dsa_slave_port_obj_add(struct net_device *dev,
291 const struct switchdev_obj *obj,
292 struct switchdev_trans *trans)
293 {
294 struct dsa_port *dp = dsa_slave_to_port(dev);
295 int err;
296
297 /* For the prepare phase, ensure the full set of changes is feasable in
298 * one go in order to signal a failure properly. If an operation is not
299 * supported, return -EOPNOTSUPP.
300 */
301
302 switch (obj->id) {
303 case SWITCHDEV_OBJ_ID_PORT_MDB:
304 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans);
305 break;
306 case SWITCHDEV_OBJ_ID_HOST_MDB:
307 /* DSA can directly translate this to a normal MDB add,
308 * but on the CPU port.
309 */
310 err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj),
311 trans);
312 break;
313 case SWITCHDEV_OBJ_ID_PORT_VLAN:
314 err = dsa_port_vlan_add(dp, SWITCHDEV_OBJ_PORT_VLAN(obj),
315 trans);
316 break;
317 default:
318 err = -EOPNOTSUPP;
319 break;
320 }
321
322 return err;
323 }
324
325 static int dsa_slave_port_obj_del(struct net_device *dev,
326 const struct switchdev_obj *obj)
327 {
328 struct dsa_port *dp = dsa_slave_to_port(dev);
329 int err;
330
331 switch (obj->id) {
332 case SWITCHDEV_OBJ_ID_PORT_MDB:
333 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
334 break;
335 case SWITCHDEV_OBJ_ID_HOST_MDB:
336 /* DSA can directly translate this to a normal MDB add,
337 * but on the CPU port.
338 */
339 err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj));
340 break;
341 case SWITCHDEV_OBJ_ID_PORT_VLAN:
342 err = dsa_port_vlan_del(dp, SWITCHDEV_OBJ_PORT_VLAN(obj));
343 break;
344 default:
345 err = -EOPNOTSUPP;
346 break;
347 }
348
349 return err;
350 }
351
352 static int dsa_slave_port_attr_get(struct net_device *dev,
353 struct switchdev_attr *attr)
354 {
355 struct dsa_port *dp = dsa_slave_to_port(dev);
356 struct dsa_switch *ds = dp->ds;
357 struct dsa_switch_tree *dst = ds->dst;
358
359 switch (attr->id) {
360 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
361 attr->u.ppid.id_len = sizeof(dst->index);
362 memcpy(&attr->u.ppid.id, &dst->index, attr->u.ppid.id_len);
363 break;
364 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT:
365 attr->u.brport_flags_support = 0;
366 break;
367 default:
368 return -EOPNOTSUPP;
369 }
370
371 return 0;
372 }
373
374 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
375 struct sk_buff *skb)
376 {
377 #ifdef CONFIG_NET_POLL_CONTROLLER
378 struct dsa_slave_priv *p = netdev_priv(dev);
379
380 if (p->netpoll)
381 netpoll_send_skb(p->netpoll, skb);
382 #else
383 BUG();
384 #endif
385 return NETDEV_TX_OK;
386 }
387
388 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
389 {
390 struct dsa_slave_priv *p = netdev_priv(dev);
391 struct pcpu_sw_netstats *s;
392 struct sk_buff *nskb;
393
394 s = this_cpu_ptr(p->stats64);
395 u64_stats_update_begin(&s->syncp);
396 s->tx_packets++;
397 s->tx_bytes += skb->len;
398 u64_stats_update_end(&s->syncp);
399
400 /* Transmit function may have to reallocate the original SKB,
401 * in which case it must have freed it. Only free it here on error.
402 */
403 nskb = p->xmit(skb, dev);
404 if (!nskb) {
405 kfree_skb(skb);
406 return NETDEV_TX_OK;
407 }
408
409 /* SKB for netpoll still need to be mangled with the protocol-specific
410 * tag to be successfully transmitted
411 */
412 if (unlikely(netpoll_tx_running(dev)))
413 return dsa_slave_netpoll_send_skb(dev, nskb);
414
415 /* Queue the SKB for transmission on the parent interface, but
416 * do not modify its EtherType
417 */
418 nskb->dev = dsa_slave_to_master(dev);
419 dev_queue_xmit(nskb);
420
421 return NETDEV_TX_OK;
422 }
423
424 /* ethtool operations *******************************************************/
425
426 static void dsa_slave_get_drvinfo(struct net_device *dev,
427 struct ethtool_drvinfo *drvinfo)
428 {
429 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
430 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
431 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
432 }
433
434 static int dsa_slave_get_regs_len(struct net_device *dev)
435 {
436 struct dsa_port *dp = dsa_slave_to_port(dev);
437 struct dsa_switch *ds = dp->ds;
438
439 if (ds->ops->get_regs_len)
440 return ds->ops->get_regs_len(ds, dp->index);
441
442 return -EOPNOTSUPP;
443 }
444
445 static void
446 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
447 {
448 struct dsa_port *dp = dsa_slave_to_port(dev);
449 struct dsa_switch *ds = dp->ds;
450
451 if (ds->ops->get_regs)
452 ds->ops->get_regs(ds, dp->index, regs, _p);
453 }
454
455 static u32 dsa_slave_get_link(struct net_device *dev)
456 {
457 if (!dev->phydev)
458 return -ENODEV;
459
460 genphy_update_link(dev->phydev);
461
462 return dev->phydev->link;
463 }
464
465 static int dsa_slave_get_eeprom_len(struct net_device *dev)
466 {
467 struct dsa_port *dp = dsa_slave_to_port(dev);
468 struct dsa_switch *ds = dp->ds;
469
470 if (ds->cd && ds->cd->eeprom_len)
471 return ds->cd->eeprom_len;
472
473 if (ds->ops->get_eeprom_len)
474 return ds->ops->get_eeprom_len(ds);
475
476 return 0;
477 }
478
479 static int dsa_slave_get_eeprom(struct net_device *dev,
480 struct ethtool_eeprom *eeprom, u8 *data)
481 {
482 struct dsa_port *dp = dsa_slave_to_port(dev);
483 struct dsa_switch *ds = dp->ds;
484
485 if (ds->ops->get_eeprom)
486 return ds->ops->get_eeprom(ds, eeprom, data);
487
488 return -EOPNOTSUPP;
489 }
490
491 static int dsa_slave_set_eeprom(struct net_device *dev,
492 struct ethtool_eeprom *eeprom, u8 *data)
493 {
494 struct dsa_port *dp = dsa_slave_to_port(dev);
495 struct dsa_switch *ds = dp->ds;
496
497 if (ds->ops->set_eeprom)
498 return ds->ops->set_eeprom(ds, eeprom, data);
499
500 return -EOPNOTSUPP;
501 }
502
503 static void dsa_slave_get_strings(struct net_device *dev,
504 uint32_t stringset, uint8_t *data)
505 {
506 struct dsa_port *dp = dsa_slave_to_port(dev);
507 struct dsa_switch *ds = dp->ds;
508
509 if (stringset == ETH_SS_STATS) {
510 int len = ETH_GSTRING_LEN;
511
512 strncpy(data, "tx_packets", len);
513 strncpy(data + len, "tx_bytes", len);
514 strncpy(data + 2 * len, "rx_packets", len);
515 strncpy(data + 3 * len, "rx_bytes", len);
516 if (ds->ops->get_strings)
517 ds->ops->get_strings(ds, dp->index, data + 4 * len);
518 }
519 }
520
521 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
522 struct ethtool_stats *stats,
523 uint64_t *data)
524 {
525 struct dsa_port *dp = dsa_slave_to_port(dev);
526 struct dsa_slave_priv *p = netdev_priv(dev);
527 struct dsa_switch *ds = dp->ds;
528 struct pcpu_sw_netstats *s;
529 unsigned int start;
530 int i;
531
532 for_each_possible_cpu(i) {
533 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
534
535 s = per_cpu_ptr(p->stats64, i);
536 do {
537 start = u64_stats_fetch_begin_irq(&s->syncp);
538 tx_packets = s->tx_packets;
539 tx_bytes = s->tx_bytes;
540 rx_packets = s->rx_packets;
541 rx_bytes = s->rx_bytes;
542 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
543 data[0] += tx_packets;
544 data[1] += tx_bytes;
545 data[2] += rx_packets;
546 data[3] += rx_bytes;
547 }
548 if (ds->ops->get_ethtool_stats)
549 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
550 }
551
552 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
553 {
554 struct dsa_port *dp = dsa_slave_to_port(dev);
555 struct dsa_switch *ds = dp->ds;
556
557 if (sset == ETH_SS_STATS) {
558 int count;
559
560 count = 4;
561 if (ds->ops->get_sset_count)
562 count += ds->ops->get_sset_count(ds);
563
564 return count;
565 }
566
567 return -EOPNOTSUPP;
568 }
569
570 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
571 {
572 struct dsa_port *dp = dsa_slave_to_port(dev);
573 struct dsa_switch *ds = dp->ds;
574
575 if (ds->ops->get_wol)
576 ds->ops->get_wol(ds, dp->index, w);
577 }
578
579 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
580 {
581 struct dsa_port *dp = dsa_slave_to_port(dev);
582 struct dsa_switch *ds = dp->ds;
583 int ret = -EOPNOTSUPP;
584
585 if (ds->ops->set_wol)
586 ret = ds->ops->set_wol(ds, dp->index, w);
587
588 return ret;
589 }
590
591 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
592 {
593 struct dsa_port *dp = dsa_slave_to_port(dev);
594 struct dsa_switch *ds = dp->ds;
595 int ret;
596
597 /* Port's PHY and MAC both need to be EEE capable */
598 if (!dev->phydev)
599 return -ENODEV;
600
601 if (!ds->ops->set_mac_eee)
602 return -EOPNOTSUPP;
603
604 ret = ds->ops->set_mac_eee(ds, dp->index, e);
605 if (ret)
606 return ret;
607
608 if (e->eee_enabled) {
609 ret = phy_init_eee(dev->phydev, 0);
610 if (ret)
611 return ret;
612 }
613
614 return phy_ethtool_set_eee(dev->phydev, e);
615 }
616
617 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
618 {
619 struct dsa_port *dp = dsa_slave_to_port(dev);
620 struct dsa_switch *ds = dp->ds;
621 int ret;
622
623 /* Port's PHY and MAC both need to be EEE capable */
624 if (!dev->phydev)
625 return -ENODEV;
626
627 if (!ds->ops->get_mac_eee)
628 return -EOPNOTSUPP;
629
630 ret = ds->ops->get_mac_eee(ds, dp->index, e);
631 if (ret)
632 return ret;
633
634 return phy_ethtool_get_eee(dev->phydev, e);
635 }
636
637 #ifdef CONFIG_NET_POLL_CONTROLLER
638 static int dsa_slave_netpoll_setup(struct net_device *dev,
639 struct netpoll_info *ni)
640 {
641 struct net_device *master = dsa_slave_to_master(dev);
642 struct dsa_slave_priv *p = netdev_priv(dev);
643 struct netpoll *netpoll;
644 int err = 0;
645
646 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
647 if (!netpoll)
648 return -ENOMEM;
649
650 err = __netpoll_setup(netpoll, master);
651 if (err) {
652 kfree(netpoll);
653 goto out;
654 }
655
656 p->netpoll = netpoll;
657 out:
658 return err;
659 }
660
661 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
662 {
663 struct dsa_slave_priv *p = netdev_priv(dev);
664 struct netpoll *netpoll = p->netpoll;
665
666 if (!netpoll)
667 return;
668
669 p->netpoll = NULL;
670
671 __netpoll_free_async(netpoll);
672 }
673
674 static void dsa_slave_poll_controller(struct net_device *dev)
675 {
676 }
677 #endif
678
679 static int dsa_slave_get_phys_port_name(struct net_device *dev,
680 char *name, size_t len)
681 {
682 struct dsa_port *dp = dsa_slave_to_port(dev);
683
684 if (snprintf(name, len, "p%d", dp->index) >= len)
685 return -EINVAL;
686
687 return 0;
688 }
689
690 static struct dsa_mall_tc_entry *
691 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
692 {
693 struct dsa_slave_priv *p = netdev_priv(dev);
694 struct dsa_mall_tc_entry *mall_tc_entry;
695
696 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
697 if (mall_tc_entry->cookie == cookie)
698 return mall_tc_entry;
699
700 return NULL;
701 }
702
703 static int dsa_slave_add_cls_matchall(struct net_device *dev,
704 struct tc_cls_matchall_offload *cls,
705 bool ingress)
706 {
707 struct dsa_port *dp = dsa_slave_to_port(dev);
708 struct dsa_slave_priv *p = netdev_priv(dev);
709 struct dsa_mall_tc_entry *mall_tc_entry;
710 __be16 protocol = cls->common.protocol;
711 struct net *net = dev_net(dev);
712 struct dsa_switch *ds = dp->ds;
713 struct net_device *to_dev;
714 const struct tc_action *a;
715 struct dsa_port *to_dp;
716 int err = -EOPNOTSUPP;
717 LIST_HEAD(actions);
718 int ifindex;
719
720 if (!ds->ops->port_mirror_add)
721 return err;
722
723 if (!tcf_exts_has_one_action(cls->exts))
724 return err;
725
726 tcf_exts_to_list(cls->exts, &actions);
727 a = list_first_entry(&actions, struct tc_action, list);
728
729 if (is_tcf_mirred_egress_mirror(a) && protocol == htons(ETH_P_ALL)) {
730 struct dsa_mall_mirror_tc_entry *mirror;
731
732 ifindex = tcf_mirred_ifindex(a);
733 to_dev = __dev_get_by_index(net, ifindex);
734 if (!to_dev)
735 return -EINVAL;
736
737 if (!dsa_slave_dev_check(to_dev))
738 return -EOPNOTSUPP;
739
740 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
741 if (!mall_tc_entry)
742 return -ENOMEM;
743
744 mall_tc_entry->cookie = cls->cookie;
745 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
746 mirror = &mall_tc_entry->mirror;
747
748 to_dp = dsa_slave_to_port(to_dev);
749
750 mirror->to_local_port = to_dp->index;
751 mirror->ingress = ingress;
752
753 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
754 if (err) {
755 kfree(mall_tc_entry);
756 return err;
757 }
758
759 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
760 }
761
762 return 0;
763 }
764
765 static void dsa_slave_del_cls_matchall(struct net_device *dev,
766 struct tc_cls_matchall_offload *cls)
767 {
768 struct dsa_port *dp = dsa_slave_to_port(dev);
769 struct dsa_mall_tc_entry *mall_tc_entry;
770 struct dsa_switch *ds = dp->ds;
771
772 if (!ds->ops->port_mirror_del)
773 return;
774
775 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
776 if (!mall_tc_entry)
777 return;
778
779 list_del(&mall_tc_entry->list);
780
781 switch (mall_tc_entry->type) {
782 case DSA_PORT_MALL_MIRROR:
783 ds->ops->port_mirror_del(ds, dp->index, &mall_tc_entry->mirror);
784 break;
785 default:
786 WARN_ON(1);
787 }
788
789 kfree(mall_tc_entry);
790 }
791
792 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
793 struct tc_cls_matchall_offload *cls,
794 bool ingress)
795 {
796 if (cls->common.chain_index)
797 return -EOPNOTSUPP;
798
799 switch (cls->command) {
800 case TC_CLSMATCHALL_REPLACE:
801 return dsa_slave_add_cls_matchall(dev, cls, ingress);
802 case TC_CLSMATCHALL_DESTROY:
803 dsa_slave_del_cls_matchall(dev, cls);
804 return 0;
805 default:
806 return -EOPNOTSUPP;
807 }
808 }
809
810 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
811 void *cb_priv, bool ingress)
812 {
813 struct net_device *dev = cb_priv;
814
815 if (!tc_can_offload(dev))
816 return -EOPNOTSUPP;
817
818 switch (type) {
819 case TC_SETUP_CLSMATCHALL:
820 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
821 default:
822 return -EOPNOTSUPP;
823 }
824 }
825
826 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
827 void *type_data, void *cb_priv)
828 {
829 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
830 }
831
832 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
833 void *type_data, void *cb_priv)
834 {
835 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
836 }
837
838 static int dsa_slave_setup_tc_block(struct net_device *dev,
839 struct tc_block_offload *f)
840 {
841 tc_setup_cb_t *cb;
842
843 if (f->binder_type == TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
844 cb = dsa_slave_setup_tc_block_cb_ig;
845 else if (f->binder_type == TCF_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
846 cb = dsa_slave_setup_tc_block_cb_eg;
847 else
848 return -EOPNOTSUPP;
849
850 switch (f->command) {
851 case TC_BLOCK_BIND:
852 return tcf_block_cb_register(f->block, cb, dev, dev);
853 case TC_BLOCK_UNBIND:
854 tcf_block_cb_unregister(f->block, cb, dev);
855 return 0;
856 default:
857 return -EOPNOTSUPP;
858 }
859 }
860
861 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
862 void *type_data)
863 {
864 switch (type) {
865 case TC_SETUP_BLOCK:
866 return dsa_slave_setup_tc_block(dev, type_data);
867 default:
868 return -EOPNOTSUPP;
869 }
870 }
871
872 static void dsa_slave_get_stats64(struct net_device *dev,
873 struct rtnl_link_stats64 *stats)
874 {
875 struct dsa_slave_priv *p = netdev_priv(dev);
876 struct pcpu_sw_netstats *s;
877 unsigned int start;
878 int i;
879
880 netdev_stats_to_stats64(stats, &dev->stats);
881 for_each_possible_cpu(i) {
882 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
883
884 s = per_cpu_ptr(p->stats64, i);
885 do {
886 start = u64_stats_fetch_begin_irq(&s->syncp);
887 tx_packets = s->tx_packets;
888 tx_bytes = s->tx_bytes;
889 rx_packets = s->rx_packets;
890 rx_bytes = s->rx_bytes;
891 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
892
893 stats->tx_packets += tx_packets;
894 stats->tx_bytes += tx_bytes;
895 stats->rx_packets += rx_packets;
896 stats->rx_bytes += rx_bytes;
897 }
898 }
899
900 static int dsa_slave_get_rxnfc(struct net_device *dev,
901 struct ethtool_rxnfc *nfc, u32 *rule_locs)
902 {
903 struct dsa_port *dp = dsa_slave_to_port(dev);
904 struct dsa_switch *ds = dp->ds;
905
906 if (!ds->ops->get_rxnfc)
907 return -EOPNOTSUPP;
908
909 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
910 }
911
912 static int dsa_slave_set_rxnfc(struct net_device *dev,
913 struct ethtool_rxnfc *nfc)
914 {
915 struct dsa_port *dp = dsa_slave_to_port(dev);
916 struct dsa_switch *ds = dp->ds;
917
918 if (!ds->ops->set_rxnfc)
919 return -EOPNOTSUPP;
920
921 return ds->ops->set_rxnfc(ds, dp->index, nfc);
922 }
923
924 static const struct ethtool_ops dsa_slave_ethtool_ops = {
925 .get_drvinfo = dsa_slave_get_drvinfo,
926 .get_regs_len = dsa_slave_get_regs_len,
927 .get_regs = dsa_slave_get_regs,
928 .nway_reset = phy_ethtool_nway_reset,
929 .get_link = dsa_slave_get_link,
930 .get_eeprom_len = dsa_slave_get_eeprom_len,
931 .get_eeprom = dsa_slave_get_eeprom,
932 .set_eeprom = dsa_slave_set_eeprom,
933 .get_strings = dsa_slave_get_strings,
934 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
935 .get_sset_count = dsa_slave_get_sset_count,
936 .set_wol = dsa_slave_set_wol,
937 .get_wol = dsa_slave_get_wol,
938 .set_eee = dsa_slave_set_eee,
939 .get_eee = dsa_slave_get_eee,
940 .get_link_ksettings = phy_ethtool_get_link_ksettings,
941 .set_link_ksettings = phy_ethtool_set_link_ksettings,
942 .get_rxnfc = dsa_slave_get_rxnfc,
943 .set_rxnfc = dsa_slave_set_rxnfc,
944 };
945
946 static const struct net_device_ops dsa_slave_netdev_ops = {
947 .ndo_open = dsa_slave_open,
948 .ndo_stop = dsa_slave_close,
949 .ndo_start_xmit = dsa_slave_xmit,
950 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
951 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
952 .ndo_set_mac_address = dsa_slave_set_mac_address,
953 .ndo_fdb_add = dsa_legacy_fdb_add,
954 .ndo_fdb_del = dsa_legacy_fdb_del,
955 .ndo_fdb_dump = dsa_slave_fdb_dump,
956 .ndo_do_ioctl = dsa_slave_ioctl,
957 .ndo_get_iflink = dsa_slave_get_iflink,
958 #ifdef CONFIG_NET_POLL_CONTROLLER
959 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
960 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
961 .ndo_poll_controller = dsa_slave_poll_controller,
962 #endif
963 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
964 .ndo_setup_tc = dsa_slave_setup_tc,
965 .ndo_get_stats64 = dsa_slave_get_stats64,
966 };
967
968 static const struct switchdev_ops dsa_slave_switchdev_ops = {
969 .switchdev_port_attr_get = dsa_slave_port_attr_get,
970 .switchdev_port_attr_set = dsa_slave_port_attr_set,
971 .switchdev_port_obj_add = dsa_slave_port_obj_add,
972 .switchdev_port_obj_del = dsa_slave_port_obj_del,
973 };
974
975 static struct device_type dsa_type = {
976 .name = "dsa",
977 };
978
979 static void dsa_slave_adjust_link(struct net_device *dev)
980 {
981 struct dsa_port *dp = dsa_slave_to_port(dev);
982 struct dsa_slave_priv *p = netdev_priv(dev);
983 struct dsa_switch *ds = dp->ds;
984 unsigned int status_changed = 0;
985
986 if (p->old_link != dev->phydev->link) {
987 status_changed = 1;
988 p->old_link = dev->phydev->link;
989 }
990
991 if (p->old_duplex != dev->phydev->duplex) {
992 status_changed = 1;
993 p->old_duplex = dev->phydev->duplex;
994 }
995
996 if (p->old_pause != dev->phydev->pause) {
997 status_changed = 1;
998 p->old_pause = dev->phydev->pause;
999 }
1000
1001 if (ds->ops->adjust_link && status_changed)
1002 ds->ops->adjust_link(ds, dp->index, dev->phydev);
1003
1004 if (status_changed)
1005 phy_print_status(dev->phydev);
1006 }
1007
1008 static int dsa_slave_fixed_link_update(struct net_device *dev,
1009 struct fixed_phy_status *status)
1010 {
1011 struct dsa_switch *ds;
1012 struct dsa_port *dp;
1013
1014 if (dev) {
1015 dp = dsa_slave_to_port(dev);
1016 ds = dp->ds;
1017 if (ds->ops->fixed_link_update)
1018 ds->ops->fixed_link_update(ds, dp->index, status);
1019 }
1020
1021 return 0;
1022 }
1023
1024 /* slave device setup *******************************************************/
1025 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
1026 {
1027 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1028 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1029 struct dsa_switch *ds = dp->ds;
1030
1031 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
1032 if (!slave_dev->phydev) {
1033 netdev_err(slave_dev, "no phy at %d\n", addr);
1034 return -ENODEV;
1035 }
1036
1037 /* Use already configured phy mode */
1038 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1039 p->phy_interface = slave_dev->phydev->interface;
1040
1041 return phy_connect_direct(slave_dev, slave_dev->phydev,
1042 dsa_slave_adjust_link, p->phy_interface);
1043 }
1044
1045 static int dsa_slave_phy_setup(struct net_device *slave_dev)
1046 {
1047 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1048 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1049 struct device_node *port_dn = dp->dn;
1050 struct dsa_switch *ds = dp->ds;
1051 struct device_node *phy_dn;
1052 bool phy_is_fixed = false;
1053 u32 phy_flags = 0;
1054 int mode, ret;
1055
1056 mode = of_get_phy_mode(port_dn);
1057 if (mode < 0)
1058 mode = PHY_INTERFACE_MODE_NA;
1059 p->phy_interface = mode;
1060
1061 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1062 if (!phy_dn && of_phy_is_fixed_link(port_dn)) {
1063 /* In the case of a fixed PHY, the DT node associated
1064 * to the fixed PHY is the Port DT node
1065 */
1066 ret = of_phy_register_fixed_link(port_dn);
1067 if (ret) {
1068 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
1069 return ret;
1070 }
1071 phy_is_fixed = true;
1072 phy_dn = of_node_get(port_dn);
1073 }
1074
1075 if (ds->ops->get_phy_flags)
1076 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
1077
1078 if (phy_dn) {
1079 slave_dev->phydev = of_phy_connect(slave_dev, phy_dn,
1080 dsa_slave_adjust_link,
1081 phy_flags,
1082 p->phy_interface);
1083 of_node_put(phy_dn);
1084 }
1085
1086 if (slave_dev->phydev && phy_is_fixed)
1087 fixed_phy_set_link_update(slave_dev->phydev,
1088 dsa_slave_fixed_link_update);
1089
1090 /* We could not connect to a designated PHY, so use the switch internal
1091 * MDIO bus instead
1092 */
1093 if (!slave_dev->phydev) {
1094 ret = dsa_slave_phy_connect(slave_dev, dp->index);
1095 if (ret) {
1096 netdev_err(slave_dev, "failed to connect to port %d: %d\n",
1097 dp->index, ret);
1098 if (phy_is_fixed)
1099 of_phy_deregister_fixed_link(port_dn);
1100 return ret;
1101 }
1102 }
1103
1104 phy_attached_info(slave_dev->phydev);
1105
1106 return 0;
1107 }
1108
1109 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1110 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1111 struct netdev_queue *txq,
1112 void *_unused)
1113 {
1114 lockdep_set_class(&txq->_xmit_lock,
1115 &dsa_slave_netdev_xmit_lock_key);
1116 }
1117
1118 int dsa_slave_suspend(struct net_device *slave_dev)
1119 {
1120 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1121
1122 if (!netif_running(slave_dev))
1123 return 0;
1124
1125 netif_device_detach(slave_dev);
1126
1127 if (slave_dev->phydev) {
1128 phy_stop(slave_dev->phydev);
1129 p->old_pause = -1;
1130 p->old_link = -1;
1131 p->old_duplex = -1;
1132 phy_suspend(slave_dev->phydev);
1133 }
1134
1135 return 0;
1136 }
1137
1138 int dsa_slave_resume(struct net_device *slave_dev)
1139 {
1140 if (!netif_running(slave_dev))
1141 return 0;
1142
1143 netif_device_attach(slave_dev);
1144
1145 if (slave_dev->phydev) {
1146 phy_resume(slave_dev->phydev);
1147 phy_start(slave_dev->phydev);
1148 }
1149
1150 return 0;
1151 }
1152
1153 static void dsa_slave_notify(struct net_device *dev, unsigned long val)
1154 {
1155 struct net_device *master = dsa_slave_to_master(dev);
1156 struct dsa_port *dp = dsa_slave_to_port(dev);
1157 struct dsa_notifier_register_info rinfo = {
1158 .switch_number = dp->ds->index,
1159 .port_number = dp->index,
1160 .master = master,
1161 .info.dev = dev,
1162 };
1163
1164 call_dsa_notifiers(val, dev, &rinfo.info);
1165 }
1166
1167 int dsa_slave_create(struct dsa_port *port)
1168 {
1169 const struct dsa_port *cpu_dp = port->cpu_dp;
1170 struct net_device *master = cpu_dp->master;
1171 struct dsa_switch *ds = port->ds;
1172 const char *name = port->name;
1173 struct net_device *slave_dev;
1174 struct dsa_slave_priv *p;
1175 int ret;
1176
1177 if (!ds->num_tx_queues)
1178 ds->num_tx_queues = 1;
1179
1180 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
1181 NET_NAME_UNKNOWN, ether_setup,
1182 ds->num_tx_queues, 1);
1183 if (slave_dev == NULL)
1184 return -ENOMEM;
1185
1186 slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
1187 slave_dev->hw_features |= NETIF_F_HW_TC;
1188 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1189 eth_hw_addr_inherit(slave_dev, master);
1190 slave_dev->priv_flags |= IFF_NO_QUEUE;
1191 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1192 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1193 slave_dev->min_mtu = 0;
1194 slave_dev->max_mtu = ETH_MAX_MTU;
1195 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1196
1197 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1198 NULL);
1199
1200 SET_NETDEV_DEV(slave_dev, port->ds->dev);
1201 slave_dev->dev.of_node = port->dn;
1202 slave_dev->vlan_features = master->vlan_features;
1203
1204 p = netdev_priv(slave_dev);
1205 p->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1206 if (!p->stats64) {
1207 free_netdev(slave_dev);
1208 return -ENOMEM;
1209 }
1210 p->dp = port;
1211 INIT_LIST_HEAD(&p->mall_tc_list);
1212 p->xmit = cpu_dp->tag_ops->xmit;
1213
1214 p->old_pause = -1;
1215 p->old_link = -1;
1216 p->old_duplex = -1;
1217
1218 port->slave = slave_dev;
1219
1220 netif_carrier_off(slave_dev);
1221
1222 ret = dsa_slave_phy_setup(slave_dev);
1223 if (ret) {
1224 netdev_err(master, "error %d setting up slave phy\n", ret);
1225 goto out_free;
1226 }
1227
1228 dsa_slave_notify(slave_dev, DSA_PORT_REGISTER);
1229
1230 ret = register_netdev(slave_dev);
1231 if (ret) {
1232 netdev_err(master, "error %d registering interface %s\n",
1233 ret, slave_dev->name);
1234 goto out_phy;
1235 }
1236
1237 return 0;
1238
1239 out_phy:
1240 phy_disconnect(slave_dev->phydev);
1241 if (of_phy_is_fixed_link(port->dn))
1242 of_phy_deregister_fixed_link(port->dn);
1243 out_free:
1244 free_percpu(p->stats64);
1245 free_netdev(slave_dev);
1246 port->slave = NULL;
1247 return ret;
1248 }
1249
1250 void dsa_slave_destroy(struct net_device *slave_dev)
1251 {
1252 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1253 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1254 struct device_node *port_dn = dp->dn;
1255
1256 netif_carrier_off(slave_dev);
1257 if (slave_dev->phydev) {
1258 phy_disconnect(slave_dev->phydev);
1259
1260 if (of_phy_is_fixed_link(port_dn))
1261 of_phy_deregister_fixed_link(port_dn);
1262 }
1263 dsa_slave_notify(slave_dev, DSA_PORT_UNREGISTER);
1264 unregister_netdev(slave_dev);
1265 free_percpu(p->stats64);
1266 free_netdev(slave_dev);
1267 }
1268
1269 static bool dsa_slave_dev_check(struct net_device *dev)
1270 {
1271 return dev->netdev_ops == &dsa_slave_netdev_ops;
1272 }
1273
1274 static int dsa_slave_changeupper(struct net_device *dev,
1275 struct netdev_notifier_changeupper_info *info)
1276 {
1277 struct dsa_port *dp = dsa_slave_to_port(dev);
1278 int err = NOTIFY_DONE;
1279
1280 if (netif_is_bridge_master(info->upper_dev)) {
1281 if (info->linking) {
1282 err = dsa_port_bridge_join(dp, info->upper_dev);
1283 err = notifier_from_errno(err);
1284 } else {
1285 dsa_port_bridge_leave(dp, info->upper_dev);
1286 err = NOTIFY_OK;
1287 }
1288 }
1289
1290 return err;
1291 }
1292
1293 static int dsa_slave_netdevice_event(struct notifier_block *nb,
1294 unsigned long event, void *ptr)
1295 {
1296 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1297
1298 if (!dsa_slave_dev_check(dev))
1299 return NOTIFY_DONE;
1300
1301 if (event == NETDEV_CHANGEUPPER)
1302 return dsa_slave_changeupper(dev, ptr);
1303
1304 return NOTIFY_DONE;
1305 }
1306
1307 struct dsa_switchdev_event_work {
1308 struct work_struct work;
1309 struct switchdev_notifier_fdb_info fdb_info;
1310 struct net_device *dev;
1311 unsigned long event;
1312 };
1313
1314 static void dsa_slave_switchdev_event_work(struct work_struct *work)
1315 {
1316 struct dsa_switchdev_event_work *switchdev_work =
1317 container_of(work, struct dsa_switchdev_event_work, work);
1318 struct net_device *dev = switchdev_work->dev;
1319 struct switchdev_notifier_fdb_info *fdb_info;
1320 struct dsa_port *dp = dsa_slave_to_port(dev);
1321 int err;
1322
1323 rtnl_lock();
1324 switch (switchdev_work->event) {
1325 case SWITCHDEV_FDB_ADD_TO_DEVICE:
1326 fdb_info = &switchdev_work->fdb_info;
1327 err = dsa_port_fdb_add(dp, fdb_info->addr, fdb_info->vid);
1328 if (err) {
1329 netdev_dbg(dev, "fdb add failed err=%d\n", err);
1330 break;
1331 }
1332 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, dev,
1333 &fdb_info->info);
1334 break;
1335
1336 case SWITCHDEV_FDB_DEL_TO_DEVICE:
1337 fdb_info = &switchdev_work->fdb_info;
1338 err = dsa_port_fdb_del(dp, fdb_info->addr, fdb_info->vid);
1339 if (err) {
1340 netdev_dbg(dev, "fdb del failed err=%d\n", err);
1341 dev_close(dev);
1342 }
1343 break;
1344 }
1345 rtnl_unlock();
1346
1347 kfree(switchdev_work->fdb_info.addr);
1348 kfree(switchdev_work);
1349 dev_put(dev);
1350 }
1351
1352 static int
1353 dsa_slave_switchdev_fdb_work_init(struct dsa_switchdev_event_work *
1354 switchdev_work,
1355 const struct switchdev_notifier_fdb_info *
1356 fdb_info)
1357 {
1358 memcpy(&switchdev_work->fdb_info, fdb_info,
1359 sizeof(switchdev_work->fdb_info));
1360 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
1361 if (!switchdev_work->fdb_info.addr)
1362 return -ENOMEM;
1363 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
1364 fdb_info->addr);
1365 return 0;
1366 }
1367
1368 /* Called under rcu_read_lock() */
1369 static int dsa_slave_switchdev_event(struct notifier_block *unused,
1370 unsigned long event, void *ptr)
1371 {
1372 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
1373 struct dsa_switchdev_event_work *switchdev_work;
1374
1375 if (!dsa_slave_dev_check(dev))
1376 return NOTIFY_DONE;
1377
1378 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
1379 if (!switchdev_work)
1380 return NOTIFY_BAD;
1381
1382 INIT_WORK(&switchdev_work->work,
1383 dsa_slave_switchdev_event_work);
1384 switchdev_work->dev = dev;
1385 switchdev_work->event = event;
1386
1387 switch (event) {
1388 case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */
1389 case SWITCHDEV_FDB_DEL_TO_DEVICE:
1390 if (dsa_slave_switchdev_fdb_work_init(switchdev_work,
1391 ptr))
1392 goto err_fdb_work_init;
1393 dev_hold(dev);
1394 break;
1395 default:
1396 kfree(switchdev_work);
1397 return NOTIFY_DONE;
1398 }
1399
1400 dsa_schedule_work(&switchdev_work->work);
1401 return NOTIFY_OK;
1402
1403 err_fdb_work_init:
1404 kfree(switchdev_work);
1405 return NOTIFY_BAD;
1406 }
1407
1408 static struct notifier_block dsa_slave_nb __read_mostly = {
1409 .notifier_call = dsa_slave_netdevice_event,
1410 };
1411
1412 static struct notifier_block dsa_slave_switchdev_notifier = {
1413 .notifier_call = dsa_slave_switchdev_event,
1414 };
1415
1416 int dsa_slave_register_notifier(void)
1417 {
1418 int err;
1419
1420 err = register_netdevice_notifier(&dsa_slave_nb);
1421 if (err)
1422 return err;
1423
1424 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
1425 if (err)
1426 goto err_switchdev_nb;
1427
1428 return 0;
1429
1430 err_switchdev_nb:
1431 unregister_netdevice_notifier(&dsa_slave_nb);
1432 return err;
1433 }
1434
1435 void dsa_slave_unregister_notifier(void)
1436 {
1437 int err;
1438
1439 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
1440 if (err)
1441 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
1442
1443 err = unregister_netdevice_notifier(&dsa_slave_nb);
1444 if (err)
1445 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
1446 }
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