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media: cpia2_usb: drop bogus interface-release call
[linux/fpc-iii.git] / net / dsa / slave.c
blobf52307296de4622b6e40072c899fa74f79419e95
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 dsa_switch *ds = dp->ds;
712 struct net_device *to_dev;
713 const struct tc_action *a;
714 struct dsa_port *to_dp;
715 int err = -EOPNOTSUPP;
716 LIST_HEAD(actions);
717
718 if (!ds->ops->port_mirror_add)
719 return err;
720
721 if (!tcf_exts_has_one_action(cls->exts))
722 return err;
723
724 tcf_exts_to_list(cls->exts, &actions);
725 a = list_first_entry(&actions, struct tc_action, list);
726
727 if (is_tcf_mirred_egress_mirror(a) && protocol == htons(ETH_P_ALL)) {
728 struct dsa_mall_mirror_tc_entry *mirror;
729
730 to_dev = tcf_mirred_dev(a);
731 if (!to_dev)
732 return -EINVAL;
733
734 if (!dsa_slave_dev_check(to_dev))
735 return -EOPNOTSUPP;
736
737 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
738 if (!mall_tc_entry)
739 return -ENOMEM;
740
741 mall_tc_entry->cookie = cls->cookie;
742 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
743 mirror = &mall_tc_entry->mirror;
744
745 to_dp = dsa_slave_to_port(to_dev);
746
747 mirror->to_local_port = to_dp->index;
748 mirror->ingress = ingress;
749
750 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
751 if (err) {
752 kfree(mall_tc_entry);
753 return err;
754 }
755
756 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
757 }
758
759 return 0;
760 }
761
762 static void dsa_slave_del_cls_matchall(struct net_device *dev,
763 struct tc_cls_matchall_offload *cls)
764 {
765 struct dsa_port *dp = dsa_slave_to_port(dev);
766 struct dsa_mall_tc_entry *mall_tc_entry;
767 struct dsa_switch *ds = dp->ds;
768
769 if (!ds->ops->port_mirror_del)
770 return;
771
772 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
773 if (!mall_tc_entry)
774 return;
775
776 list_del(&mall_tc_entry->list);
777
778 switch (mall_tc_entry->type) {
779 case DSA_PORT_MALL_MIRROR:
780 ds->ops->port_mirror_del(ds, dp->index, &mall_tc_entry->mirror);
781 break;
782 default:
783 WARN_ON(1);
784 }
785
786 kfree(mall_tc_entry);
787 }
788
789 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
790 struct tc_cls_matchall_offload *cls,
791 bool ingress)
792 {
793 if (cls->common.chain_index)
794 return -EOPNOTSUPP;
795
796 switch (cls->command) {
797 case TC_CLSMATCHALL_REPLACE:
798 return dsa_slave_add_cls_matchall(dev, cls, ingress);
799 case TC_CLSMATCHALL_DESTROY:
800 dsa_slave_del_cls_matchall(dev, cls);
801 return 0;
802 default:
803 return -EOPNOTSUPP;
804 }
805 }
806
807 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
808 void *cb_priv, bool ingress)
809 {
810 struct net_device *dev = cb_priv;
811
812 if (!tc_can_offload(dev))
813 return -EOPNOTSUPP;
814
815 switch (type) {
816 case TC_SETUP_CLSMATCHALL:
817 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
818 default:
819 return -EOPNOTSUPP;
820 }
821 }
822
823 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
824 void *type_data, void *cb_priv)
825 {
826 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
827 }
828
829 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
830 void *type_data, void *cb_priv)
831 {
832 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
833 }
834
835 static int dsa_slave_setup_tc_block(struct net_device *dev,
836 struct tc_block_offload *f)
837 {
838 tc_setup_cb_t *cb;
839
840 if (f->binder_type == TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
841 cb = dsa_slave_setup_tc_block_cb_ig;
842 else if (f->binder_type == TCF_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
843 cb = dsa_slave_setup_tc_block_cb_eg;
844 else
845 return -EOPNOTSUPP;
846
847 switch (f->command) {
848 case TC_BLOCK_BIND:
849 return tcf_block_cb_register(f->block, cb, dev, dev);
850 case TC_BLOCK_UNBIND:
851 tcf_block_cb_unregister(f->block, cb, dev);
852 return 0;
853 default:
854 return -EOPNOTSUPP;
855 }
856 }
857
858 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
859 void *type_data)
860 {
861 switch (type) {
862 case TC_SETUP_BLOCK:
863 return dsa_slave_setup_tc_block(dev, type_data);
864 default:
865 return -EOPNOTSUPP;
866 }
867 }
868
869 static void dsa_slave_get_stats64(struct net_device *dev,
870 struct rtnl_link_stats64 *stats)
871 {
872 struct dsa_slave_priv *p = netdev_priv(dev);
873 struct pcpu_sw_netstats *s;
874 unsigned int start;
875 int i;
876
877 netdev_stats_to_stats64(stats, &dev->stats);
878 for_each_possible_cpu(i) {
879 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
880
881 s = per_cpu_ptr(p->stats64, i);
882 do {
883 start = u64_stats_fetch_begin_irq(&s->syncp);
884 tx_packets = s->tx_packets;
885 tx_bytes = s->tx_bytes;
886 rx_packets = s->rx_packets;
887 rx_bytes = s->rx_bytes;
888 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
889
890 stats->tx_packets += tx_packets;
891 stats->tx_bytes += tx_bytes;
892 stats->rx_packets += rx_packets;
893 stats->rx_bytes += rx_bytes;
894 }
895 }
896
897 static int dsa_slave_get_rxnfc(struct net_device *dev,
898 struct ethtool_rxnfc *nfc, u32 *rule_locs)
899 {
900 struct dsa_port *dp = dsa_slave_to_port(dev);
901 struct dsa_switch *ds = dp->ds;
902
903 if (!ds->ops->get_rxnfc)
904 return -EOPNOTSUPP;
905
906 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
907 }
908
909 static int dsa_slave_set_rxnfc(struct net_device *dev,
910 struct ethtool_rxnfc *nfc)
911 {
912 struct dsa_port *dp = dsa_slave_to_port(dev);
913 struct dsa_switch *ds = dp->ds;
914
915 if (!ds->ops->set_rxnfc)
916 return -EOPNOTSUPP;
917
918 return ds->ops->set_rxnfc(ds, dp->index, nfc);
919 }
920
921 static const struct ethtool_ops dsa_slave_ethtool_ops = {
922 .get_drvinfo = dsa_slave_get_drvinfo,
923 .get_regs_len = dsa_slave_get_regs_len,
924 .get_regs = dsa_slave_get_regs,
925 .nway_reset = phy_ethtool_nway_reset,
926 .get_link = dsa_slave_get_link,
927 .get_eeprom_len = dsa_slave_get_eeprom_len,
928 .get_eeprom = dsa_slave_get_eeprom,
929 .set_eeprom = dsa_slave_set_eeprom,
930 .get_strings = dsa_slave_get_strings,
931 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
932 .get_sset_count = dsa_slave_get_sset_count,
933 .set_wol = dsa_slave_set_wol,
934 .get_wol = dsa_slave_get_wol,
935 .set_eee = dsa_slave_set_eee,
936 .get_eee = dsa_slave_get_eee,
937 .get_link_ksettings = phy_ethtool_get_link_ksettings,
938 .set_link_ksettings = phy_ethtool_set_link_ksettings,
939 .get_rxnfc = dsa_slave_get_rxnfc,
940 .set_rxnfc = dsa_slave_set_rxnfc,
941 };
942
943 /* legacy way, bypassing the bridge *****************************************/
944 int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
945 struct net_device *dev,
946 const unsigned char *addr, u16 vid,
947 u16 flags)
948 {
949 struct dsa_port *dp = dsa_slave_to_port(dev);
950
951 return dsa_port_fdb_add(dp, addr, vid);
952 }
953
954 int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
955 struct net_device *dev,
956 const unsigned char *addr, u16 vid)
957 {
958 struct dsa_port *dp = dsa_slave_to_port(dev);
959
960 return dsa_port_fdb_del(dp, addr, vid);
961 }
962
963 static const struct net_device_ops dsa_slave_netdev_ops = {
964 .ndo_open = dsa_slave_open,
965 .ndo_stop = dsa_slave_close,
966 .ndo_start_xmit = dsa_slave_xmit,
967 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
968 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
969 .ndo_set_mac_address = dsa_slave_set_mac_address,
970 .ndo_fdb_add = dsa_legacy_fdb_add,
971 .ndo_fdb_del = dsa_legacy_fdb_del,
972 .ndo_fdb_dump = dsa_slave_fdb_dump,
973 .ndo_do_ioctl = dsa_slave_ioctl,
974 .ndo_get_iflink = dsa_slave_get_iflink,
975 #ifdef CONFIG_NET_POLL_CONTROLLER
976 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
977 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
978 .ndo_poll_controller = dsa_slave_poll_controller,
979 #endif
980 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
981 .ndo_setup_tc = dsa_slave_setup_tc,
982 .ndo_get_stats64 = dsa_slave_get_stats64,
983 };
984
985 static const struct switchdev_ops dsa_slave_switchdev_ops = {
986 .switchdev_port_attr_get = dsa_slave_port_attr_get,
987 .switchdev_port_attr_set = dsa_slave_port_attr_set,
988 .switchdev_port_obj_add = dsa_slave_port_obj_add,
989 .switchdev_port_obj_del = dsa_slave_port_obj_del,
990 };
991
992 static struct device_type dsa_type = {
993 .name = "dsa",
994 };
995
996 static void dsa_slave_adjust_link(struct net_device *dev)
997 {
998 struct dsa_port *dp = dsa_slave_to_port(dev);
999 struct dsa_slave_priv *p = netdev_priv(dev);
1000 struct dsa_switch *ds = dp->ds;
1001 unsigned int status_changed = 0;
1002
1003 if (p->old_link != dev->phydev->link) {
1004 status_changed = 1;
1005 p->old_link = dev->phydev->link;
1006 }
1007
1008 if (p->old_duplex != dev->phydev->duplex) {
1009 status_changed = 1;
1010 p->old_duplex = dev->phydev->duplex;
1011 }
1012
1013 if (p->old_pause != dev->phydev->pause) {
1014 status_changed = 1;
1015 p->old_pause = dev->phydev->pause;
1016 }
1017
1018 if (ds->ops->adjust_link && status_changed)
1019 ds->ops->adjust_link(ds, dp->index, dev->phydev);
1020
1021 if (status_changed)
1022 phy_print_status(dev->phydev);
1023 }
1024
1025 static int dsa_slave_fixed_link_update(struct net_device *dev,
1026 struct fixed_phy_status *status)
1027 {
1028 struct dsa_switch *ds;
1029 struct dsa_port *dp;
1030
1031 if (dev) {
1032 dp = dsa_slave_to_port(dev);
1033 ds = dp->ds;
1034 if (ds->ops->fixed_link_update)
1035 ds->ops->fixed_link_update(ds, dp->index, status);
1036 }
1037
1038 return 0;
1039 }
1040
1041 /* slave device setup *******************************************************/
1042 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
1043 {
1044 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1045 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1046 struct dsa_switch *ds = dp->ds;
1047
1048 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
1049 if (!slave_dev->phydev) {
1050 netdev_err(slave_dev, "no phy at %d\n", addr);
1051 return -ENODEV;
1052 }
1053
1054 /* Use already configured phy mode */
1055 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1056 p->phy_interface = slave_dev->phydev->interface;
1057
1058 return phy_connect_direct(slave_dev, slave_dev->phydev,
1059 dsa_slave_adjust_link, p->phy_interface);
1060 }
1061
1062 static int dsa_slave_phy_setup(struct net_device *slave_dev)
1063 {
1064 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1065 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1066 struct device_node *port_dn = dp->dn;
1067 struct dsa_switch *ds = dp->ds;
1068 struct device_node *phy_dn;
1069 bool phy_is_fixed = false;
1070 u32 phy_flags = 0;
1071 int mode, ret;
1072
1073 mode = of_get_phy_mode(port_dn);
1074 if (mode < 0)
1075 mode = PHY_INTERFACE_MODE_NA;
1076 p->phy_interface = mode;
1077
1078 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1079 if (!phy_dn && of_phy_is_fixed_link(port_dn)) {
1080 /* In the case of a fixed PHY, the DT node associated
1081 * to the fixed PHY is the Port DT node
1082 */
1083 ret = of_phy_register_fixed_link(port_dn);
1084 if (ret) {
1085 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
1086 return ret;
1087 }
1088 phy_is_fixed = true;
1089 phy_dn = of_node_get(port_dn);
1090 }
1091
1092 if (ds->ops->get_phy_flags)
1093 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
1094
1095 if (phy_dn) {
1096 slave_dev->phydev = of_phy_connect(slave_dev, phy_dn,
1097 dsa_slave_adjust_link,
1098 phy_flags,
1099 p->phy_interface);
1100 of_node_put(phy_dn);
1101 }
1102
1103 if (slave_dev->phydev && phy_is_fixed)
1104 fixed_phy_set_link_update(slave_dev->phydev,
1105 dsa_slave_fixed_link_update);
1106
1107 /* We could not connect to a designated PHY, so use the switch internal
1108 * MDIO bus instead
1109 */
1110 if (!slave_dev->phydev) {
1111 ret = dsa_slave_phy_connect(slave_dev, dp->index);
1112 if (ret) {
1113 netdev_err(slave_dev, "failed to connect to port %d: %d\n",
1114 dp->index, ret);
1115 if (phy_is_fixed)
1116 of_phy_deregister_fixed_link(port_dn);
1117 return ret;
1118 }
1119 }
1120
1121 phy_attached_info(slave_dev->phydev);
1122
1123 return 0;
1124 }
1125
1126 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1127 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1128 struct netdev_queue *txq,
1129 void *_unused)
1130 {
1131 lockdep_set_class(&txq->_xmit_lock,
1132 &dsa_slave_netdev_xmit_lock_key);
1133 }
1134
1135 int dsa_slave_suspend(struct net_device *slave_dev)
1136 {
1137 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1138
1139 netif_device_detach(slave_dev);
1140
1141 if (slave_dev->phydev) {
1142 phy_stop(slave_dev->phydev);
1143 p->old_pause = -1;
1144 p->old_link = -1;
1145 p->old_duplex = -1;
1146 phy_suspend(slave_dev->phydev);
1147 }
1148
1149 return 0;
1150 }
1151
1152 int dsa_slave_resume(struct net_device *slave_dev)
1153 {
1154 netif_device_attach(slave_dev);
1155
1156 if (slave_dev->phydev) {
1157 phy_resume(slave_dev->phydev);
1158 phy_start(slave_dev->phydev);
1159 }
1160
1161 return 0;
1162 }
1163
1164 static void dsa_slave_notify(struct net_device *dev, unsigned long val)
1165 {
1166 struct net_device *master = dsa_slave_to_master(dev);
1167 struct dsa_port *dp = dsa_slave_to_port(dev);
1168 struct dsa_notifier_register_info rinfo = {
1169 .switch_number = dp->ds->index,
1170 .port_number = dp->index,
1171 .master = master,
1172 .info.dev = dev,
1173 };
1174
1175 call_dsa_notifiers(val, dev, &rinfo.info);
1176 }
1177
1178 int dsa_slave_create(struct dsa_port *port)
1179 {
1180 const struct dsa_port *cpu_dp = port->cpu_dp;
1181 struct net_device *master = cpu_dp->master;
1182 struct dsa_switch *ds = port->ds;
1183 const char *name = port->name;
1184 struct net_device *slave_dev;
1185 struct dsa_slave_priv *p;
1186 int ret;
1187
1188 if (!ds->num_tx_queues)
1189 ds->num_tx_queues = 1;
1190
1191 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
1192 NET_NAME_UNKNOWN, ether_setup,
1193 ds->num_tx_queues, 1);
1194 if (slave_dev == NULL)
1195 return -ENOMEM;
1196
1197 slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
1198 slave_dev->hw_features |= NETIF_F_HW_TC;
1199 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1200 eth_hw_addr_inherit(slave_dev, master);
1201 slave_dev->priv_flags |= IFF_NO_QUEUE;
1202 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1203 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1204 slave_dev->min_mtu = 0;
1205 slave_dev->max_mtu = ETH_MAX_MTU;
1206 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1207
1208 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1209 NULL);
1210
1211 SET_NETDEV_DEV(slave_dev, port->ds->dev);
1212 slave_dev->dev.of_node = port->dn;
1213 slave_dev->vlan_features = master->vlan_features;
1214
1215 p = netdev_priv(slave_dev);
1216 p->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1217 if (!p->stats64) {
1218 free_netdev(slave_dev);
1219 return -ENOMEM;
1220 }
1221 p->dp = port;
1222 INIT_LIST_HEAD(&p->mall_tc_list);
1223 p->xmit = cpu_dp->tag_ops->xmit;
1224
1225 p->old_pause = -1;
1226 p->old_link = -1;
1227 p->old_duplex = -1;
1228
1229 port->slave = slave_dev;
1230
1231 netif_carrier_off(slave_dev);
1232
1233 ret = dsa_slave_phy_setup(slave_dev);
1234 if (ret) {
1235 netdev_err(master, "error %d setting up slave phy\n", ret);
1236 goto out_free;
1237 }
1238
1239 dsa_slave_notify(slave_dev, DSA_PORT_REGISTER);
1240
1241 ret = register_netdev(slave_dev);
1242 if (ret) {
1243 netdev_err(master, "error %d registering interface %s\n",
1244 ret, slave_dev->name);
1245 goto out_phy;
1246 }
1247
1248 return 0;
1249
1250 out_phy:
1251 phy_disconnect(slave_dev->phydev);
1252 if (of_phy_is_fixed_link(port->dn))
1253 of_phy_deregister_fixed_link(port->dn);
1254 out_free:
1255 free_percpu(p->stats64);
1256 free_netdev(slave_dev);
1257 port->slave = NULL;
1258 return ret;
1259 }
1260
1261 void dsa_slave_destroy(struct net_device *slave_dev)
1262 {
1263 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1264 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1265 struct device_node *port_dn = dp->dn;
1266
1267 netif_carrier_off(slave_dev);
1268 if (slave_dev->phydev) {
1269 phy_disconnect(slave_dev->phydev);
1270
1271 if (of_phy_is_fixed_link(port_dn))
1272 of_phy_deregister_fixed_link(port_dn);
1273 }
1274 dsa_slave_notify(slave_dev, DSA_PORT_UNREGISTER);
1275 unregister_netdev(slave_dev);
1276 free_percpu(p->stats64);
1277 free_netdev(slave_dev);
1278 }
1279
1280 static bool dsa_slave_dev_check(struct net_device *dev)
1281 {
1282 return dev->netdev_ops == &dsa_slave_netdev_ops;
1283 }
1284
1285 static int dsa_slave_changeupper(struct net_device *dev,
1286 struct netdev_notifier_changeupper_info *info)
1287 {
1288 struct dsa_port *dp = dsa_slave_to_port(dev);
1289 int err = NOTIFY_DONE;
1290
1291 if (netif_is_bridge_master(info->upper_dev)) {
1292 if (info->linking) {
1293 err = dsa_port_bridge_join(dp, info->upper_dev);
1294 err = notifier_from_errno(err);
1295 } else {
1296 dsa_port_bridge_leave(dp, info->upper_dev);
1297 err = NOTIFY_OK;
1298 }
1299 }
1300
1301 return err;
1302 }
1303
1304 static int dsa_slave_netdevice_event(struct notifier_block *nb,
1305 unsigned long event, void *ptr)
1306 {
1307 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1308
1309 if (!dsa_slave_dev_check(dev))
1310 return NOTIFY_DONE;
1311
1312 if (event == NETDEV_CHANGEUPPER)
1313 return dsa_slave_changeupper(dev, ptr);
1314
1315 return NOTIFY_DONE;
1316 }
1317
1318 struct dsa_switchdev_event_work {
1319 struct work_struct work;
1320 struct switchdev_notifier_fdb_info fdb_info;
1321 struct net_device *dev;
1322 unsigned long event;
1323 };
1324
1325 static void dsa_slave_switchdev_event_work(struct work_struct *work)
1326 {
1327 struct dsa_switchdev_event_work *switchdev_work =
1328 container_of(work, struct dsa_switchdev_event_work, work);
1329 struct net_device *dev = switchdev_work->dev;
1330 struct switchdev_notifier_fdb_info *fdb_info;
1331 struct dsa_port *dp = dsa_slave_to_port(dev);
1332 int err;
1333
1334 rtnl_lock();
1335 switch (switchdev_work->event) {
1336 case SWITCHDEV_FDB_ADD_TO_DEVICE:
1337 fdb_info = &switchdev_work->fdb_info;
1338 err = dsa_port_fdb_add(dp, fdb_info->addr, fdb_info->vid);
1339 if (err) {
1340 netdev_dbg(dev, "fdb add failed err=%d\n", err);
1341 break;
1342 }
1343 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, dev,
1344 &fdb_info->info);
1345 break;
1346
1347 case SWITCHDEV_FDB_DEL_TO_DEVICE:
1348 fdb_info = &switchdev_work->fdb_info;
1349 err = dsa_port_fdb_del(dp, fdb_info->addr, fdb_info->vid);
1350 if (err) {
1351 netdev_dbg(dev, "fdb del failed err=%d\n", err);
1352 dev_close(dev);
1353 }
1354 break;
1355 }
1356 rtnl_unlock();
1357
1358 kfree(switchdev_work->fdb_info.addr);
1359 kfree(switchdev_work);
1360 dev_put(dev);
1361 }
1362
1363 static int
1364 dsa_slave_switchdev_fdb_work_init(struct dsa_switchdev_event_work *
1365 switchdev_work,
1366 const struct switchdev_notifier_fdb_info *
1367 fdb_info)
1368 {
1369 memcpy(&switchdev_work->fdb_info, fdb_info,
1370 sizeof(switchdev_work->fdb_info));
1371 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
1372 if (!switchdev_work->fdb_info.addr)
1373 return -ENOMEM;
1374 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
1375 fdb_info->addr);
1376 return 0;
1377 }
1378
1379 /* Called under rcu_read_lock() */
1380 static int dsa_slave_switchdev_event(struct notifier_block *unused,
1381 unsigned long event, void *ptr)
1382 {
1383 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
1384 struct dsa_switchdev_event_work *switchdev_work;
1385
1386 if (!dsa_slave_dev_check(dev))
1387 return NOTIFY_DONE;
1388
1389 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
1390 if (!switchdev_work)
1391 return NOTIFY_BAD;
1392
1393 INIT_WORK(&switchdev_work->work,
1394 dsa_slave_switchdev_event_work);
1395 switchdev_work->dev = dev;
1396 switchdev_work->event = event;
1397
1398 switch (event) {
1399 case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */
1400 case SWITCHDEV_FDB_DEL_TO_DEVICE:
1401 if (dsa_slave_switchdev_fdb_work_init(switchdev_work,
1402 ptr))
1403 goto err_fdb_work_init;
1404 dev_hold(dev);
1405 break;
1406 default:
1407 kfree(switchdev_work);
1408 return NOTIFY_DONE;
1409 }
1410
1411 dsa_schedule_work(&switchdev_work->work);
1412 return NOTIFY_OK;
1413
1414 err_fdb_work_init:
1415 kfree(switchdev_work);
1416 return NOTIFY_BAD;
1417 }
1418
1419 static struct notifier_block dsa_slave_nb __read_mostly = {
1420 .notifier_call = dsa_slave_netdevice_event,
1421 };
1422
1423 static struct notifier_block dsa_slave_switchdev_notifier = {
1424 .notifier_call = dsa_slave_switchdev_event,
1425 };
1426
1427 int dsa_slave_register_notifier(void)
1428 {
1429 int err;
1430
1431 err = register_netdevice_notifier(&dsa_slave_nb);
1432 if (err)
1433 return err;
1434
1435 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
1436 if (err)
1437 goto err_switchdev_nb;
1438
1439 return 0;
1440
1441 err_switchdev_nb:
1442 unregister_netdevice_notifier(&dsa_slave_nb);
1443 return err;
1444 }
1445
1446 void dsa_slave_unregister_notifier(void)
1447 {
1448 int err;
1449
1450 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
1451 if (err)
1452 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
1453
1454 err = unregister_netdevice_notifier(&dsa_slave_nb);
1455 if (err)
1456 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
1457 }
Linux with added FPC-III support