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