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7#include <linux/list.h>
8#include <linux/etherdevice.h>
9#include <linux/netdevice.h>
10#include <linux/phy.h>
11#include <linux/phy_fixed.h>
12#include <linux/phylink.h>
13#include <linux/of_net.h>
14#include <linux/of_mdio.h>
15#include <linux/mdio.h>
16#include <net/rtnetlink.h>
17#include <net/pkt_cls.h>
18#include <net/tc_act/tc_mirred.h>
19#include <linux/if_bridge.h>
20#include <linux/netpoll.h>
21#include <linux/ptp_classify.h>
22
23#include "dsa_priv.h"
24
25static bool dsa_slave_dev_check(const struct net_device *dev);
26
27
28static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
29{
30 struct dsa_switch *ds = bus->priv;
31
32 if (ds->phys_mii_mask & (1 << addr))
33 return ds->ops->phy_read(ds, addr, reg);
34
35 return 0xffff;
36}
37
38static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
39{
40 struct dsa_switch *ds = bus->priv;
41
42 if (ds->phys_mii_mask & (1 << addr))
43 return ds->ops->phy_write(ds, addr, reg, val);
44
45 return 0;
46}
47
48void dsa_slave_mii_bus_init(struct dsa_switch *ds)
49{
50 ds->slave_mii_bus->priv = (void *)ds;
51 ds->slave_mii_bus->name = "dsa slave smi";
52 ds->slave_mii_bus->read = dsa_slave_phy_read;
53 ds->slave_mii_bus->write = dsa_slave_phy_write;
54 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
55 ds->dst->index, ds->index);
56 ds->slave_mii_bus->parent = ds->dev;
57 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
58}
59
60
61
62static int dsa_slave_get_iflink(const struct net_device *dev)
63{
64 return dsa_slave_to_master(dev)->ifindex;
65}
66
67static int dsa_slave_open(struct net_device *dev)
68{
69 struct net_device *master = dsa_slave_to_master(dev);
70 struct dsa_port *dp = dsa_slave_to_port(dev);
71 int err;
72
73 if (!(master->flags & IFF_UP))
74 return -ENETDOWN;
75
76 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
77 err = dev_uc_add(master, dev->dev_addr);
78 if (err < 0)
79 goto out;
80 }
81
82 if (dev->flags & IFF_ALLMULTI) {
83 err = dev_set_allmulti(master, 1);
84 if (err < 0)
85 goto del_unicast;
86 }
87 if (dev->flags & IFF_PROMISC) {
88 err = dev_set_promiscuity(master, 1);
89 if (err < 0)
90 goto clear_allmulti;
91 }
92
93 err = dsa_port_enable(dp, dev->phydev);
94 if (err)
95 goto clear_promisc;
96
97 phylink_start(dp->pl);
98
99 return 0;
100
101clear_promisc:
102 if (dev->flags & IFF_PROMISC)
103 dev_set_promiscuity(master, -1);
104clear_allmulti:
105 if (dev->flags & IFF_ALLMULTI)
106 dev_set_allmulti(master, -1);
107del_unicast:
108 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
109 dev_uc_del(master, dev->dev_addr);
110out:
111 return err;
112}
113
114static int dsa_slave_close(struct net_device *dev)
115{
116 struct net_device *master = dsa_slave_to_master(dev);
117 struct dsa_port *dp = dsa_slave_to_port(dev);
118
119 cancel_work_sync(&dp->xmit_work);
120 skb_queue_purge(&dp->xmit_queue);
121
122 phylink_stop(dp->pl);
123
124 dsa_port_disable(dp);
125
126 dev_mc_unsync(master, dev);
127 dev_uc_unsync(master, dev);
128 if (dev->flags & IFF_ALLMULTI)
129 dev_set_allmulti(master, -1);
130 if (dev->flags & IFF_PROMISC)
131 dev_set_promiscuity(master, -1);
132
133 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
134 dev_uc_del(master, dev->dev_addr);
135
136 return 0;
137}
138
139static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
140{
141 struct net_device *master = dsa_slave_to_master(dev);
142 if (dev->flags & IFF_UP) {
143 if (change & IFF_ALLMULTI)
144 dev_set_allmulti(master,
145 dev->flags & IFF_ALLMULTI ? 1 : -1);
146 if (change & IFF_PROMISC)
147 dev_set_promiscuity(master,
148 dev->flags & IFF_PROMISC ? 1 : -1);
149 }
150}
151
152static void dsa_slave_set_rx_mode(struct net_device *dev)
153{
154 struct net_device *master = dsa_slave_to_master(dev);
155
156 dev_mc_sync(master, dev);
157 dev_uc_sync(master, dev);
158}
159
160static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
161{
162 struct net_device *master = dsa_slave_to_master(dev);
163 struct sockaddr *addr = a;
164 int err;
165
166 if (!is_valid_ether_addr(addr->sa_data))
167 return -EADDRNOTAVAIL;
168
169 if (!(dev->flags & IFF_UP))
170 goto out;
171
172 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
173 err = dev_uc_add(master, addr->sa_data);
174 if (err < 0)
175 return err;
176 }
177
178 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
179 dev_uc_del(master, dev->dev_addr);
180
181out:
182 ether_addr_copy(dev->dev_addr, addr->sa_data);
183
184 return 0;
185}
186
187struct dsa_slave_dump_ctx {
188 struct net_device *dev;
189 struct sk_buff *skb;
190 struct netlink_callback *cb;
191 int idx;
192};
193
194static int
195dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid,
196 bool is_static, void *data)
197{
198 struct dsa_slave_dump_ctx *dump = data;
199 u32 portid = NETLINK_CB(dump->cb->skb).portid;
200 u32 seq = dump->cb->nlh->nlmsg_seq;
201 struct nlmsghdr *nlh;
202 struct ndmsg *ndm;
203
204 if (dump->idx < dump->cb->args[2])
205 goto skip;
206
207 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
208 sizeof(*ndm), NLM_F_MULTI);
209 if (!nlh)
210 return -EMSGSIZE;
211
212 ndm = nlmsg_data(nlh);
213 ndm->ndm_family = AF_BRIDGE;
214 ndm->ndm_pad1 = 0;
215 ndm->ndm_pad2 = 0;
216 ndm->ndm_flags = NTF_SELF;
217 ndm->ndm_type = 0;
218 ndm->ndm_ifindex = dump->dev->ifindex;
219 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
220
221 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
222 goto nla_put_failure;
223
224 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
225 goto nla_put_failure;
226
227 nlmsg_end(dump->skb, nlh);
228
229skip:
230 dump->idx++;
231 return 0;
232
233nla_put_failure:
234 nlmsg_cancel(dump->skb, nlh);
235 return -EMSGSIZE;
236}
237
238static int
239dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
240 struct net_device *dev, struct net_device *filter_dev,
241 int *idx)
242{
243 struct dsa_port *dp = dsa_slave_to_port(dev);
244 struct dsa_slave_dump_ctx dump = {
245 .dev = dev,
246 .skb = skb,
247 .cb = cb,
248 .idx = *idx,
249 };
250 int err;
251
252 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump);
253 *idx = dump.idx;
254
255 return err;
256}
257
258static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
259{
260 struct dsa_slave_priv *p = netdev_priv(dev);
261 struct dsa_switch *ds = p->dp->ds;
262 int port = p->dp->index;
263
264
265 switch (cmd) {
266 case SIOCGHWTSTAMP:
267 if (ds->ops->port_hwtstamp_get)
268 return ds->ops->port_hwtstamp_get(ds, port, ifr);
269 break;
270 case SIOCSHWTSTAMP:
271 if (ds->ops->port_hwtstamp_set)
272 return ds->ops->port_hwtstamp_set(ds, port, ifr);
273 break;
274 }
275
276 return phylink_mii_ioctl(p->dp->pl, ifr, cmd);
277}
278
279static int dsa_slave_port_attr_set(struct net_device *dev,
280 const struct switchdev_attr *attr,
281 struct switchdev_trans *trans)
282{
283 struct dsa_port *dp = dsa_slave_to_port(dev);
284 int ret;
285
286 switch (attr->id) {
287 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
288 ret = dsa_port_set_state(dp, attr->u.stp_state, trans);
289 break;
290 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
291 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
292 trans);
293 break;
294 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
295 ret = dsa_port_ageing_time(dp, attr->u.ageing_time, trans);
296 break;
297 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
298 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags,
299 trans);
300 break;
301 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
302 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, trans);
303 break;
304 case SWITCHDEV_ATTR_ID_BRIDGE_MROUTER:
305 ret = dsa_port_mrouter(dp->cpu_dp, attr->u.mrouter, trans);
306 break;
307 default:
308 ret = -EOPNOTSUPP;
309 break;
310 }
311
312 return ret;
313}
314
315static int dsa_slave_vlan_add(struct net_device *dev,
316 const struct switchdev_obj *obj,
317 struct switchdev_trans *trans)
318{
319 struct dsa_port *dp = dsa_slave_to_port(dev);
320 struct switchdev_obj_port_vlan vlan;
321 int err;
322
323 if (obj->orig_dev != dev)
324 return -EOPNOTSUPP;
325
326 if (dp->bridge_dev && !br_vlan_enabled(dp->bridge_dev))
327 return 0;
328
329 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj);
330
331 err = dsa_port_vlan_add(dp, &vlan, trans);
332 if (err)
333 return err;
334
335
336
337
338
339 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID;
340
341 err = dsa_port_vlan_add(dp->cpu_dp, &vlan, trans);
342 if (err)
343 return err;
344
345 return 0;
346}
347
348static int dsa_slave_port_obj_add(struct net_device *dev,
349 const struct switchdev_obj *obj,
350 struct switchdev_trans *trans,
351 struct netlink_ext_ack *extack)
352{
353 struct dsa_port *dp = dsa_slave_to_port(dev);
354 int err;
355
356
357
358
359
360
361 switch (obj->id) {
362 case SWITCHDEV_OBJ_ID_PORT_MDB:
363 if (obj->orig_dev != dev)
364 return -EOPNOTSUPP;
365 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans);
366 break;
367 case SWITCHDEV_OBJ_ID_HOST_MDB:
368
369
370
371 err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj),
372 trans);
373 break;
374 case SWITCHDEV_OBJ_ID_PORT_VLAN:
375 err = dsa_slave_vlan_add(dev, obj, trans);
376 break;
377 default:
378 err = -EOPNOTSUPP;
379 break;
380 }
381
382 return err;
383}
384
385static int dsa_slave_vlan_del(struct net_device *dev,
386 const struct switchdev_obj *obj)
387{
388 struct dsa_port *dp = dsa_slave_to_port(dev);
389
390 if (obj->orig_dev != dev)
391 return -EOPNOTSUPP;
392
393 if (dp->bridge_dev && !br_vlan_enabled(dp->bridge_dev))
394 return 0;
395
396
397
398
399 return dsa_port_vlan_del(dp, SWITCHDEV_OBJ_PORT_VLAN(obj));
400}
401
402static int dsa_slave_port_obj_del(struct net_device *dev,
403 const struct switchdev_obj *obj)
404{
405 struct dsa_port *dp = dsa_slave_to_port(dev);
406 int err;
407
408 switch (obj->id) {
409 case SWITCHDEV_OBJ_ID_PORT_MDB:
410 if (obj->orig_dev != dev)
411 return -EOPNOTSUPP;
412 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
413 break;
414 case SWITCHDEV_OBJ_ID_HOST_MDB:
415
416
417
418 err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj));
419 break;
420 case SWITCHDEV_OBJ_ID_PORT_VLAN:
421 err = dsa_slave_vlan_del(dev, obj);
422 break;
423 default:
424 err = -EOPNOTSUPP;
425 break;
426 }
427
428 return err;
429}
430
431static int dsa_slave_get_port_parent_id(struct net_device *dev,
432 struct netdev_phys_item_id *ppid)
433{
434 struct dsa_port *dp = dsa_slave_to_port(dev);
435 struct dsa_switch *ds = dp->ds;
436 struct dsa_switch_tree *dst = ds->dst;
437
438
439
440
441
442 if (dp->ds->devlink)
443 return -EOPNOTSUPP;
444
445 ppid->id_len = sizeof(dst->index);
446 memcpy(&ppid->id, &dst->index, ppid->id_len);
447
448 return 0;
449}
450
451static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
452 struct sk_buff *skb)
453{
454#ifdef CONFIG_NET_POLL_CONTROLLER
455 struct dsa_slave_priv *p = netdev_priv(dev);
456
457 if (p->netpoll)
458 netpoll_send_skb(p->netpoll, skb);
459#else
460 BUG();
461#endif
462 return NETDEV_TX_OK;
463}
464
465static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
466 struct sk_buff *skb)
467{
468 struct dsa_switch *ds = p->dp->ds;
469 struct sk_buff *clone;
470 unsigned int type;
471
472 type = ptp_classify_raw(skb);
473 if (type == PTP_CLASS_NONE)
474 return;
475
476 if (!ds->ops->port_txtstamp)
477 return;
478
479 clone = skb_clone_sk(skb);
480 if (!clone)
481 return;
482
483 DSA_SKB_CB(skb)->clone = clone;
484
485 if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type))
486 return;
487
488 kfree_skb(clone);
489}
490
491netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
492{
493
494
495
496 if (unlikely(netpoll_tx_running(dev)))
497 return dsa_slave_netpoll_send_skb(dev, skb);
498
499
500
501
502 skb->dev = dsa_slave_to_master(dev);
503 dev_queue_xmit(skb);
504
505 return NETDEV_TX_OK;
506}
507EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
508
509static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
510{
511 struct dsa_slave_priv *p = netdev_priv(dev);
512 struct pcpu_sw_netstats *s;
513 struct sk_buff *nskb;
514
515 s = this_cpu_ptr(p->stats64);
516 u64_stats_update_begin(&s->syncp);
517 s->tx_packets++;
518 s->tx_bytes += skb->len;
519 u64_stats_update_end(&s->syncp);
520
521 DSA_SKB_CB(skb)->deferred_xmit = false;
522 DSA_SKB_CB(skb)->clone = NULL;
523
524
525
526
527 dsa_skb_tx_timestamp(p, skb);
528
529
530
531
532 nskb = p->xmit(skb, dev);
533 if (!nskb) {
534 if (!DSA_SKB_CB(skb)->deferred_xmit)
535 kfree_skb(skb);
536 return NETDEV_TX_OK;
537 }
538
539 return dsa_enqueue_skb(nskb, dev);
540}
541
542void *dsa_defer_xmit(struct sk_buff *skb, struct net_device *dev)
543{
544 struct dsa_port *dp = dsa_slave_to_port(dev);
545
546 DSA_SKB_CB(skb)->deferred_xmit = true;
547
548 skb_queue_tail(&dp->xmit_queue, skb);
549 schedule_work(&dp->xmit_work);
550 return NULL;
551}
552EXPORT_SYMBOL_GPL(dsa_defer_xmit);
553
554static void dsa_port_xmit_work(struct work_struct *work)
555{
556 struct dsa_port *dp = container_of(work, struct dsa_port, xmit_work);
557 struct dsa_switch *ds = dp->ds;
558 struct sk_buff *skb;
559
560 if (unlikely(!ds->ops->port_deferred_xmit))
561 return;
562
563 while ((skb = skb_dequeue(&dp->xmit_queue)) != NULL)
564 ds->ops->port_deferred_xmit(ds, dp->index, skb);
565}
566
567
568
569static void dsa_slave_get_drvinfo(struct net_device *dev,
570 struct ethtool_drvinfo *drvinfo)
571{
572 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
573 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
574 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
575}
576
577static int dsa_slave_get_regs_len(struct net_device *dev)
578{
579 struct dsa_port *dp = dsa_slave_to_port(dev);
580 struct dsa_switch *ds = dp->ds;
581
582 if (ds->ops->get_regs_len)
583 return ds->ops->get_regs_len(ds, dp->index);
584
585 return -EOPNOTSUPP;
586}
587
588static void
589dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
590{
591 struct dsa_port *dp = dsa_slave_to_port(dev);
592 struct dsa_switch *ds = dp->ds;
593
594 if (ds->ops->get_regs)
595 ds->ops->get_regs(ds, dp->index, regs, _p);
596}
597
598static int dsa_slave_nway_reset(struct net_device *dev)
599{
600 struct dsa_port *dp = dsa_slave_to_port(dev);
601
602 return phylink_ethtool_nway_reset(dp->pl);
603}
604
605static int dsa_slave_get_eeprom_len(struct net_device *dev)
606{
607 struct dsa_port *dp = dsa_slave_to_port(dev);
608 struct dsa_switch *ds = dp->ds;
609
610 if (ds->cd && ds->cd->eeprom_len)
611 return ds->cd->eeprom_len;
612
613 if (ds->ops->get_eeprom_len)
614 return ds->ops->get_eeprom_len(ds);
615
616 return 0;
617}
618
619static int dsa_slave_get_eeprom(struct net_device *dev,
620 struct ethtool_eeprom *eeprom, u8 *data)
621{
622 struct dsa_port *dp = dsa_slave_to_port(dev);
623 struct dsa_switch *ds = dp->ds;
624
625 if (ds->ops->get_eeprom)
626 return ds->ops->get_eeprom(ds, eeprom, data);
627
628 return -EOPNOTSUPP;
629}
630
631static int dsa_slave_set_eeprom(struct net_device *dev,
632 struct ethtool_eeprom *eeprom, u8 *data)
633{
634 struct dsa_port *dp = dsa_slave_to_port(dev);
635 struct dsa_switch *ds = dp->ds;
636
637 if (ds->ops->set_eeprom)
638 return ds->ops->set_eeprom(ds, eeprom, data);
639
640 return -EOPNOTSUPP;
641}
642
643static void dsa_slave_get_strings(struct net_device *dev,
644 uint32_t stringset, uint8_t *data)
645{
646 struct dsa_port *dp = dsa_slave_to_port(dev);
647 struct dsa_switch *ds = dp->ds;
648
649 if (stringset == ETH_SS_STATS) {
650 int len = ETH_GSTRING_LEN;
651
652 strncpy(data, "tx_packets", len);
653 strncpy(data + len, "tx_bytes", len);
654 strncpy(data + 2 * len, "rx_packets", len);
655 strncpy(data + 3 * len, "rx_bytes", len);
656 if (ds->ops->get_strings)
657 ds->ops->get_strings(ds, dp->index, stringset,
658 data + 4 * len);
659 }
660}
661
662static void dsa_slave_get_ethtool_stats(struct net_device *dev,
663 struct ethtool_stats *stats,
664 uint64_t *data)
665{
666 struct dsa_port *dp = dsa_slave_to_port(dev);
667 struct dsa_slave_priv *p = netdev_priv(dev);
668 struct dsa_switch *ds = dp->ds;
669 struct pcpu_sw_netstats *s;
670 unsigned int start;
671 int i;
672
673 for_each_possible_cpu(i) {
674 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
675
676 s = per_cpu_ptr(p->stats64, i);
677 do {
678 start = u64_stats_fetch_begin_irq(&s->syncp);
679 tx_packets = s->tx_packets;
680 tx_bytes = s->tx_bytes;
681 rx_packets = s->rx_packets;
682 rx_bytes = s->rx_bytes;
683 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
684 data[0] += tx_packets;
685 data[1] += tx_bytes;
686 data[2] += rx_packets;
687 data[3] += rx_bytes;
688 }
689 if (ds->ops->get_ethtool_stats)
690 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
691}
692
693static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
694{
695 struct dsa_port *dp = dsa_slave_to_port(dev);
696 struct dsa_switch *ds = dp->ds;
697
698 if (sset == ETH_SS_STATS) {
699 int count;
700
701 count = 4;
702 if (ds->ops->get_sset_count)
703 count += ds->ops->get_sset_count(ds, dp->index, sset);
704
705 return count;
706 }
707
708 return -EOPNOTSUPP;
709}
710
711static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
712{
713 struct dsa_port *dp = dsa_slave_to_port(dev);
714 struct dsa_switch *ds = dp->ds;
715
716 phylink_ethtool_get_wol(dp->pl, w);
717
718 if (ds->ops->get_wol)
719 ds->ops->get_wol(ds, dp->index, w);
720}
721
722static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
723{
724 struct dsa_port *dp = dsa_slave_to_port(dev);
725 struct dsa_switch *ds = dp->ds;
726 int ret = -EOPNOTSUPP;
727
728 phylink_ethtool_set_wol(dp->pl, w);
729
730 if (ds->ops->set_wol)
731 ret = ds->ops->set_wol(ds, dp->index, w);
732
733 return ret;
734}
735
736static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
737{
738 struct dsa_port *dp = dsa_slave_to_port(dev);
739 struct dsa_switch *ds = dp->ds;
740 int ret;
741
742
743 if (!dev->phydev || !dp->pl)
744 return -ENODEV;
745
746 if (!ds->ops->set_mac_eee)
747 return -EOPNOTSUPP;
748
749 ret = ds->ops->set_mac_eee(ds, dp->index, e);
750 if (ret)
751 return ret;
752
753 return phylink_ethtool_set_eee(dp->pl, e);
754}
755
756static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
757{
758 struct dsa_port *dp = dsa_slave_to_port(dev);
759 struct dsa_switch *ds = dp->ds;
760 int ret;
761
762
763 if (!dev->phydev || !dp->pl)
764 return -ENODEV;
765
766 if (!ds->ops->get_mac_eee)
767 return -EOPNOTSUPP;
768
769 ret = ds->ops->get_mac_eee(ds, dp->index, e);
770 if (ret)
771 return ret;
772
773 return phylink_ethtool_get_eee(dp->pl, e);
774}
775
776static int dsa_slave_get_link_ksettings(struct net_device *dev,
777 struct ethtool_link_ksettings *cmd)
778{
779 struct dsa_port *dp = dsa_slave_to_port(dev);
780
781 return phylink_ethtool_ksettings_get(dp->pl, cmd);
782}
783
784static int dsa_slave_set_link_ksettings(struct net_device *dev,
785 const struct ethtool_link_ksettings *cmd)
786{
787 struct dsa_port *dp = dsa_slave_to_port(dev);
788
789 return phylink_ethtool_ksettings_set(dp->pl, cmd);
790}
791
792#ifdef CONFIG_NET_POLL_CONTROLLER
793static int dsa_slave_netpoll_setup(struct net_device *dev,
794 struct netpoll_info *ni)
795{
796 struct net_device *master = dsa_slave_to_master(dev);
797 struct dsa_slave_priv *p = netdev_priv(dev);
798 struct netpoll *netpoll;
799 int err = 0;
800
801 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
802 if (!netpoll)
803 return -ENOMEM;
804
805 err = __netpoll_setup(netpoll, master);
806 if (err) {
807 kfree(netpoll);
808 goto out;
809 }
810
811 p->netpoll = netpoll;
812out:
813 return err;
814}
815
816static void dsa_slave_netpoll_cleanup(struct net_device *dev)
817{
818 struct dsa_slave_priv *p = netdev_priv(dev);
819 struct netpoll *netpoll = p->netpoll;
820
821 if (!netpoll)
822 return;
823
824 p->netpoll = NULL;
825
826 __netpoll_free(netpoll);
827}
828
829static void dsa_slave_poll_controller(struct net_device *dev)
830{
831}
832#endif
833
834static int dsa_slave_get_phys_port_name(struct net_device *dev,
835 char *name, size_t len)
836{
837 struct dsa_port *dp = dsa_slave_to_port(dev);
838
839
840
841
842
843 if (dp->ds->devlink)
844 return -EOPNOTSUPP;
845
846 if (snprintf(name, len, "p%d", dp->index) >= len)
847 return -EINVAL;
848
849 return 0;
850}
851
852static struct dsa_mall_tc_entry *
853dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
854{
855 struct dsa_slave_priv *p = netdev_priv(dev);
856 struct dsa_mall_tc_entry *mall_tc_entry;
857
858 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
859 if (mall_tc_entry->cookie == cookie)
860 return mall_tc_entry;
861
862 return NULL;
863}
864
865static int dsa_slave_add_cls_matchall(struct net_device *dev,
866 struct tc_cls_matchall_offload *cls,
867 bool ingress)
868{
869 struct dsa_port *dp = dsa_slave_to_port(dev);
870 struct dsa_slave_priv *p = netdev_priv(dev);
871 struct dsa_mall_tc_entry *mall_tc_entry;
872 __be16 protocol = cls->common.protocol;
873 struct dsa_switch *ds = dp->ds;
874 struct flow_action_entry *act;
875 struct dsa_port *to_dp;
876 int err = -EOPNOTSUPP;
877
878 if (!ds->ops->port_mirror_add)
879 return err;
880
881 if (!flow_offload_has_one_action(&cls->rule->action))
882 return err;
883
884 act = &cls->rule->action.entries[0];
885
886 if (act->id == FLOW_ACTION_MIRRED && protocol == htons(ETH_P_ALL)) {
887 struct dsa_mall_mirror_tc_entry *mirror;
888
889 if (!act->dev)
890 return -EINVAL;
891
892 if (!dsa_slave_dev_check(act->dev))
893 return -EOPNOTSUPP;
894
895 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
896 if (!mall_tc_entry)
897 return -ENOMEM;
898
899 mall_tc_entry->cookie = cls->cookie;
900 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
901 mirror = &mall_tc_entry->mirror;
902
903 to_dp = dsa_slave_to_port(act->dev);
904
905 mirror->to_local_port = to_dp->index;
906 mirror->ingress = ingress;
907
908 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
909 if (err) {
910 kfree(mall_tc_entry);
911 return err;
912 }
913
914 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
915 }
916
917 return 0;
918}
919
920static void dsa_slave_del_cls_matchall(struct net_device *dev,
921 struct tc_cls_matchall_offload *cls)
922{
923 struct dsa_port *dp = dsa_slave_to_port(dev);
924 struct dsa_mall_tc_entry *mall_tc_entry;
925 struct dsa_switch *ds = dp->ds;
926
927 if (!ds->ops->port_mirror_del)
928 return;
929
930 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
931 if (!mall_tc_entry)
932 return;
933
934 list_del(&mall_tc_entry->list);
935
936 switch (mall_tc_entry->type) {
937 case DSA_PORT_MALL_MIRROR:
938 ds->ops->port_mirror_del(ds, dp->index, &mall_tc_entry->mirror);
939 break;
940 default:
941 WARN_ON(1);
942 }
943
944 kfree(mall_tc_entry);
945}
946
947static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
948 struct tc_cls_matchall_offload *cls,
949 bool ingress)
950{
951 if (cls->common.chain_index)
952 return -EOPNOTSUPP;
953
954 switch (cls->command) {
955 case TC_CLSMATCHALL_REPLACE:
956 return dsa_slave_add_cls_matchall(dev, cls, ingress);
957 case TC_CLSMATCHALL_DESTROY:
958 dsa_slave_del_cls_matchall(dev, cls);
959 return 0;
960 default:
961 return -EOPNOTSUPP;
962 }
963}
964
965static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
966 void *cb_priv, bool ingress)
967{
968 struct net_device *dev = cb_priv;
969
970 if (!tc_can_offload(dev))
971 return -EOPNOTSUPP;
972
973 switch (type) {
974 case TC_SETUP_CLSMATCHALL:
975 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
976 default:
977 return -EOPNOTSUPP;
978 }
979}
980
981static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
982 void *type_data, void *cb_priv)
983{
984 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
985}
986
987static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
988 void *type_data, void *cb_priv)
989{
990 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
991}
992
993static LIST_HEAD(dsa_slave_block_cb_list);
994
995static int dsa_slave_setup_tc_block(struct net_device *dev,
996 struct flow_block_offload *f)
997{
998 struct flow_block_cb *block_cb;
999 flow_setup_cb_t *cb;
1000
1001 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
1002 cb = dsa_slave_setup_tc_block_cb_ig;
1003 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
1004 cb = dsa_slave_setup_tc_block_cb_eg;
1005 else
1006 return -EOPNOTSUPP;
1007
1008 f->driver_block_list = &dsa_slave_block_cb_list;
1009
1010 switch (f->command) {
1011 case FLOW_BLOCK_BIND:
1012 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list))
1013 return -EBUSY;
1014
1015 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL);
1016 if (IS_ERR(block_cb))
1017 return PTR_ERR(block_cb);
1018
1019 flow_block_cb_add(block_cb, f);
1020 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list);
1021 return 0;
1022 case FLOW_BLOCK_UNBIND:
1023 block_cb = flow_block_cb_lookup(f->block, cb, dev);
1024 if (!block_cb)
1025 return -ENOENT;
1026
1027 flow_block_cb_remove(block_cb, f);
1028 list_del(&block_cb->driver_list);
1029 return 0;
1030 default:
1031 return -EOPNOTSUPP;
1032 }
1033}
1034
1035static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
1036 void *type_data)
1037{
1038 struct dsa_port *dp = dsa_slave_to_port(dev);
1039 struct dsa_switch *ds = dp->ds;
1040
1041 if (type == TC_SETUP_BLOCK)
1042 return dsa_slave_setup_tc_block(dev, type_data);
1043
1044 if (!ds->ops->port_setup_tc)
1045 return -EOPNOTSUPP;
1046
1047 return ds->ops->port_setup_tc(ds, dp->index, type, type_data);
1048}
1049
1050static void dsa_slave_get_stats64(struct net_device *dev,
1051 struct rtnl_link_stats64 *stats)
1052{
1053 struct dsa_slave_priv *p = netdev_priv(dev);
1054 struct pcpu_sw_netstats *s;
1055 unsigned int start;
1056 int i;
1057
1058 netdev_stats_to_stats64(stats, &dev->stats);
1059 for_each_possible_cpu(i) {
1060 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
1061
1062 s = per_cpu_ptr(p->stats64, i);
1063 do {
1064 start = u64_stats_fetch_begin_irq(&s->syncp);
1065 tx_packets = s->tx_packets;
1066 tx_bytes = s->tx_bytes;
1067 rx_packets = s->rx_packets;
1068 rx_bytes = s->rx_bytes;
1069 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
1070
1071 stats->tx_packets += tx_packets;
1072 stats->tx_bytes += tx_bytes;
1073 stats->rx_packets += rx_packets;
1074 stats->rx_bytes += rx_bytes;
1075 }
1076}
1077
1078static int dsa_slave_get_rxnfc(struct net_device *dev,
1079 struct ethtool_rxnfc *nfc, u32 *rule_locs)
1080{
1081 struct dsa_port *dp = dsa_slave_to_port(dev);
1082 struct dsa_switch *ds = dp->ds;
1083
1084 if (!ds->ops->get_rxnfc)
1085 return -EOPNOTSUPP;
1086
1087 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
1088}
1089
1090static int dsa_slave_set_rxnfc(struct net_device *dev,
1091 struct ethtool_rxnfc *nfc)
1092{
1093 struct dsa_port *dp = dsa_slave_to_port(dev);
1094 struct dsa_switch *ds = dp->ds;
1095
1096 if (!ds->ops->set_rxnfc)
1097 return -EOPNOTSUPP;
1098
1099 return ds->ops->set_rxnfc(ds, dp->index, nfc);
1100}
1101
1102static int dsa_slave_get_ts_info(struct net_device *dev,
1103 struct ethtool_ts_info *ts)
1104{
1105 struct dsa_slave_priv *p = netdev_priv(dev);
1106 struct dsa_switch *ds = p->dp->ds;
1107
1108 if (!ds->ops->get_ts_info)
1109 return -EOPNOTSUPP;
1110
1111 return ds->ops->get_ts_info(ds, p->dp->index, ts);
1112}
1113
1114static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
1115 u16 vid)
1116{
1117 struct dsa_port *dp = dsa_slave_to_port(dev);
1118 struct bridge_vlan_info info;
1119 int ret;
1120
1121
1122
1123
1124 if (dp->bridge_dev) {
1125 if (!br_vlan_enabled(dp->bridge_dev))
1126 return 0;
1127
1128
1129
1130
1131
1132 ret = br_vlan_get_info(dp->bridge_dev, vid, &info);
1133 if (ret == 0)
1134 return -EBUSY;
1135 }
1136
1137 ret = dsa_port_vid_add(dp, vid, 0);
1138 if (ret)
1139 return ret;
1140
1141 ret = dsa_port_vid_add(dp->cpu_dp, vid, 0);
1142 if (ret)
1143 return ret;
1144
1145 return 0;
1146}
1147
1148static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
1149 u16 vid)
1150{
1151 struct dsa_port *dp = dsa_slave_to_port(dev);
1152 struct bridge_vlan_info info;
1153 int ret;
1154
1155
1156
1157
1158 if (dp->bridge_dev) {
1159 if (!br_vlan_enabled(dp->bridge_dev))
1160 return 0;
1161
1162
1163
1164
1165
1166 ret = br_vlan_get_info(dp->bridge_dev, vid, &info);
1167 if (ret == 0)
1168 return -EBUSY;
1169 }
1170
1171
1172
1173
1174 return dsa_port_vid_del(dp, vid);
1175}
1176
1177static const struct ethtool_ops dsa_slave_ethtool_ops = {
1178 .get_drvinfo = dsa_slave_get_drvinfo,
1179 .get_regs_len = dsa_slave_get_regs_len,
1180 .get_regs = dsa_slave_get_regs,
1181 .nway_reset = dsa_slave_nway_reset,
1182 .get_link = ethtool_op_get_link,
1183 .get_eeprom_len = dsa_slave_get_eeprom_len,
1184 .get_eeprom = dsa_slave_get_eeprom,
1185 .set_eeprom = dsa_slave_set_eeprom,
1186 .get_strings = dsa_slave_get_strings,
1187 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
1188 .get_sset_count = dsa_slave_get_sset_count,
1189 .set_wol = dsa_slave_set_wol,
1190 .get_wol = dsa_slave_get_wol,
1191 .set_eee = dsa_slave_set_eee,
1192 .get_eee = dsa_slave_get_eee,
1193 .get_link_ksettings = dsa_slave_get_link_ksettings,
1194 .set_link_ksettings = dsa_slave_set_link_ksettings,
1195 .get_rxnfc = dsa_slave_get_rxnfc,
1196 .set_rxnfc = dsa_slave_set_rxnfc,
1197 .get_ts_info = dsa_slave_get_ts_info,
1198};
1199
1200
1201int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
1202 struct net_device *dev,
1203 const unsigned char *addr, u16 vid,
1204 u16 flags,
1205 struct netlink_ext_ack *extack)
1206{
1207 struct dsa_port *dp = dsa_slave_to_port(dev);
1208
1209 return dsa_port_fdb_add(dp, addr, vid);
1210}
1211
1212int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
1213 struct net_device *dev,
1214 const unsigned char *addr, u16 vid)
1215{
1216 struct dsa_port *dp = dsa_slave_to_port(dev);
1217
1218 return dsa_port_fdb_del(dp, addr, vid);
1219}
1220
1221static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
1222{
1223 struct dsa_port *dp = dsa_slave_to_port(dev);
1224
1225 return dp->ds->devlink ? &dp->devlink_port : NULL;
1226}
1227
1228static const struct net_device_ops dsa_slave_netdev_ops = {
1229 .ndo_open = dsa_slave_open,
1230 .ndo_stop = dsa_slave_close,
1231 .ndo_start_xmit = dsa_slave_xmit,
1232 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
1233 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
1234 .ndo_set_mac_address = dsa_slave_set_mac_address,
1235 .ndo_fdb_add = dsa_legacy_fdb_add,
1236 .ndo_fdb_del = dsa_legacy_fdb_del,
1237 .ndo_fdb_dump = dsa_slave_fdb_dump,
1238 .ndo_do_ioctl = dsa_slave_ioctl,
1239 .ndo_get_iflink = dsa_slave_get_iflink,
1240#ifdef CONFIG_NET_POLL_CONTROLLER
1241 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
1242 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
1243 .ndo_poll_controller = dsa_slave_poll_controller,
1244#endif
1245 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
1246 .ndo_setup_tc = dsa_slave_setup_tc,
1247 .ndo_get_stats64 = dsa_slave_get_stats64,
1248 .ndo_get_port_parent_id = dsa_slave_get_port_parent_id,
1249 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
1250 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
1251 .ndo_get_devlink_port = dsa_slave_get_devlink_port,
1252};
1253
1254static struct device_type dsa_type = {
1255 .name = "dsa",
1256};
1257
1258void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
1259{
1260 const struct dsa_port *dp = dsa_to_port(ds, port);
1261
1262 phylink_mac_change(dp->pl, up);
1263}
1264EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
1265
1266static void dsa_slave_phylink_fixed_state(struct net_device *dev,
1267 struct phylink_link_state *state)
1268{
1269 struct dsa_port *dp = dsa_slave_to_port(dev);
1270 struct dsa_switch *ds = dp->ds;
1271
1272
1273
1274
1275 ds->ops->phylink_fixed_state(ds, dp->index, state);
1276}
1277
1278
1279static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
1280{
1281 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1282 struct dsa_switch *ds = dp->ds;
1283
1284 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
1285 if (!slave_dev->phydev) {
1286 netdev_err(slave_dev, "no phy at %d\n", addr);
1287 return -ENODEV;
1288 }
1289
1290 return phylink_connect_phy(dp->pl, slave_dev->phydev);
1291}
1292
1293static int dsa_slave_phy_setup(struct net_device *slave_dev)
1294{
1295 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1296 struct device_node *port_dn = dp->dn;
1297 struct dsa_switch *ds = dp->ds;
1298 u32 phy_flags = 0;
1299 int mode, ret;
1300
1301 mode = of_get_phy_mode(port_dn);
1302 if (mode < 0)
1303 mode = PHY_INTERFACE_MODE_NA;
1304
1305 dp->pl_config.dev = &slave_dev->dev;
1306 dp->pl_config.type = PHYLINK_NETDEV;
1307
1308 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode,
1309 &dsa_port_phylink_mac_ops);
1310 if (IS_ERR(dp->pl)) {
1311 netdev_err(slave_dev,
1312 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1313 return PTR_ERR(dp->pl);
1314 }
1315
1316
1317
1318
1319
1320 if (ds->ops->phylink_fixed_state)
1321 phylink_fixed_state_cb(dp->pl, dsa_slave_phylink_fixed_state);
1322
1323 if (ds->ops->get_phy_flags)
1324 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
1325
1326 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
1327 if (ret == -ENODEV && ds->slave_mii_bus) {
1328
1329
1330
1331 ret = dsa_slave_phy_connect(slave_dev, dp->index);
1332 if (ret) {
1333 netdev_err(slave_dev,
1334 "failed to connect to port %d: %d\n",
1335 dp->index, ret);
1336 phylink_destroy(dp->pl);
1337 return ret;
1338 }
1339 }
1340
1341 return ret;
1342}
1343
1344int dsa_slave_suspend(struct net_device *slave_dev)
1345{
1346 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1347
1348 if (!netif_running(slave_dev))
1349 return 0;
1350
1351 cancel_work_sync(&dp->xmit_work);
1352 skb_queue_purge(&dp->xmit_queue);
1353
1354 netif_device_detach(slave_dev);
1355
1356 rtnl_lock();
1357 phylink_stop(dp->pl);
1358 rtnl_unlock();
1359
1360 return 0;
1361}
1362
1363int dsa_slave_resume(struct net_device *slave_dev)
1364{
1365 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1366
1367 if (!netif_running(slave_dev))
1368 return 0;
1369
1370 netif_device_attach(slave_dev);
1371
1372 rtnl_lock();
1373 phylink_start(dp->pl);
1374 rtnl_unlock();
1375
1376 return 0;
1377}
1378
1379static void dsa_slave_notify(struct net_device *dev, unsigned long val)
1380{
1381 struct net_device *master = dsa_slave_to_master(dev);
1382 struct dsa_port *dp = dsa_slave_to_port(dev);
1383 struct dsa_notifier_register_info rinfo = {
1384 .switch_number = dp->ds->index,
1385 .port_number = dp->index,
1386 .master = master,
1387 .info.dev = dev,
1388 };
1389
1390 call_dsa_notifiers(val, dev, &rinfo.info);
1391}
1392
1393int dsa_slave_create(struct dsa_port *port)
1394{
1395 const struct dsa_port *cpu_dp = port->cpu_dp;
1396 struct net_device *master = cpu_dp->master;
1397 struct dsa_switch *ds = port->ds;
1398 const char *name = port->name;
1399 struct net_device *slave_dev;
1400 struct dsa_slave_priv *p;
1401 int ret;
1402
1403 if (!ds->num_tx_queues)
1404 ds->num_tx_queues = 1;
1405
1406 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
1407 NET_NAME_UNKNOWN, ether_setup,
1408 ds->num_tx_queues, 1);
1409 if (slave_dev == NULL)
1410 return -ENOMEM;
1411
1412 slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
1413 if (ds->ops->port_vlan_add && ds->ops->port_vlan_del)
1414 slave_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1415 slave_dev->hw_features |= NETIF_F_HW_TC;
1416 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1417 if (!IS_ERR_OR_NULL(port->mac))
1418 ether_addr_copy(slave_dev->dev_addr, port->mac);
1419 else
1420 eth_hw_addr_inherit(slave_dev, master);
1421 slave_dev->priv_flags |= IFF_NO_QUEUE;
1422 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1423 slave_dev->min_mtu = 0;
1424 slave_dev->max_mtu = ETH_MAX_MTU;
1425 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1426
1427 SET_NETDEV_DEV(slave_dev, port->ds->dev);
1428 slave_dev->dev.of_node = port->dn;
1429 slave_dev->vlan_features = master->vlan_features;
1430
1431 p = netdev_priv(slave_dev);
1432 p->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1433 if (!p->stats64) {
1434 free_netdev(slave_dev);
1435 return -ENOMEM;
1436 }
1437 p->dp = port;
1438 INIT_LIST_HEAD(&p->mall_tc_list);
1439 INIT_WORK(&port->xmit_work, dsa_port_xmit_work);
1440 skb_queue_head_init(&port->xmit_queue);
1441 p->xmit = cpu_dp->tag_ops->xmit;
1442 port->slave = slave_dev;
1443
1444 netif_carrier_off(slave_dev);
1445
1446 ret = dsa_slave_phy_setup(slave_dev);
1447 if (ret) {
1448 netdev_err(master, "error %d setting up slave phy\n", ret);
1449 goto out_free;
1450 }
1451
1452 dsa_slave_notify(slave_dev, DSA_PORT_REGISTER);
1453
1454 ret = register_netdev(slave_dev);
1455 if (ret) {
1456 netdev_err(master, "error %d registering interface %s\n",
1457 ret, slave_dev->name);
1458 goto out_phy;
1459 }
1460
1461 return 0;
1462
1463out_phy:
1464 rtnl_lock();
1465 phylink_disconnect_phy(p->dp->pl);
1466 rtnl_unlock();
1467 phylink_destroy(p->dp->pl);
1468out_free:
1469 free_percpu(p->stats64);
1470 free_netdev(slave_dev);
1471 port->slave = NULL;
1472 return ret;
1473}
1474
1475void dsa_slave_destroy(struct net_device *slave_dev)
1476{
1477 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1478 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1479
1480 netif_carrier_off(slave_dev);
1481 rtnl_lock();
1482 phylink_disconnect_phy(dp->pl);
1483 rtnl_unlock();
1484
1485 dsa_slave_notify(slave_dev, DSA_PORT_UNREGISTER);
1486 unregister_netdev(slave_dev);
1487 phylink_destroy(dp->pl);
1488 free_percpu(p->stats64);
1489 free_netdev(slave_dev);
1490}
1491
1492static bool dsa_slave_dev_check(const struct net_device *dev)
1493{
1494 return dev->netdev_ops == &dsa_slave_netdev_ops;
1495}
1496
1497static int dsa_slave_changeupper(struct net_device *dev,
1498 struct netdev_notifier_changeupper_info *info)
1499{
1500 struct dsa_port *dp = dsa_slave_to_port(dev);
1501 int err = NOTIFY_DONE;
1502
1503 if (netif_is_bridge_master(info->upper_dev)) {
1504 if (info->linking) {
1505 err = dsa_port_bridge_join(dp, info->upper_dev);
1506 err = notifier_from_errno(err);
1507 } else {
1508 dsa_port_bridge_leave(dp, info->upper_dev);
1509 err = NOTIFY_OK;
1510 }
1511 }
1512
1513 return err;
1514}
1515
1516static int dsa_slave_upper_vlan_check(struct net_device *dev,
1517 struct netdev_notifier_changeupper_info *
1518 info)
1519{
1520 struct netlink_ext_ack *ext_ack;
1521 struct net_device *slave;
1522 struct dsa_port *dp;
1523
1524 ext_ack = netdev_notifier_info_to_extack(&info->info);
1525
1526 if (!is_vlan_dev(dev))
1527 return NOTIFY_DONE;
1528
1529 slave = vlan_dev_real_dev(dev);
1530 if (!dsa_slave_dev_check(slave))
1531 return NOTIFY_DONE;
1532
1533 dp = dsa_slave_to_port(slave);
1534 if (!dp->bridge_dev)
1535 return NOTIFY_DONE;
1536
1537
1538 if (br_vlan_enabled(dp->bridge_dev) &&
1539 netif_is_bridge_master(info->upper_dev) && info->linking) {
1540 NL_SET_ERR_MSG_MOD(ext_ack,
1541 "Cannot enslave VLAN device into VLAN aware bridge");
1542 return notifier_from_errno(-EINVAL);
1543 }
1544
1545 return NOTIFY_DONE;
1546}
1547
1548static int dsa_slave_netdevice_event(struct notifier_block *nb,
1549 unsigned long event, void *ptr)
1550{
1551 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1552
1553 if (event == NETDEV_CHANGEUPPER) {
1554 if (!dsa_slave_dev_check(dev))
1555 return dsa_slave_upper_vlan_check(dev, ptr);
1556
1557 return dsa_slave_changeupper(dev, ptr);
1558 }
1559
1560 return NOTIFY_DONE;
1561}
1562
1563struct dsa_switchdev_event_work {
1564 struct work_struct work;
1565 struct switchdev_notifier_fdb_info fdb_info;
1566 struct net_device *dev;
1567 unsigned long event;
1568};
1569
1570static void dsa_slave_switchdev_event_work(struct work_struct *work)
1571{
1572 struct dsa_switchdev_event_work *switchdev_work =
1573 container_of(work, struct dsa_switchdev_event_work, work);
1574 struct net_device *dev = switchdev_work->dev;
1575 struct switchdev_notifier_fdb_info *fdb_info;
1576 struct dsa_port *dp = dsa_slave_to_port(dev);
1577 int err;
1578
1579 rtnl_lock();
1580 switch (switchdev_work->event) {
1581 case SWITCHDEV_FDB_ADD_TO_DEVICE:
1582 fdb_info = &switchdev_work->fdb_info;
1583 if (!fdb_info->added_by_user)
1584 break;
1585
1586 err = dsa_port_fdb_add(dp, fdb_info->addr, fdb_info->vid);
1587 if (err) {
1588 netdev_dbg(dev, "fdb add failed err=%d\n", err);
1589 break;
1590 }
1591 fdb_info->offloaded = true;
1592 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, dev,
1593 &fdb_info->info, NULL);
1594 break;
1595
1596 case SWITCHDEV_FDB_DEL_TO_DEVICE:
1597 fdb_info = &switchdev_work->fdb_info;
1598 if (!fdb_info->added_by_user)
1599 break;
1600
1601 err = dsa_port_fdb_del(dp, fdb_info->addr, fdb_info->vid);
1602 if (err) {
1603 netdev_dbg(dev, "fdb del failed err=%d\n", err);
1604 dev_close(dev);
1605 }
1606 break;
1607 }
1608 rtnl_unlock();
1609
1610 kfree(switchdev_work->fdb_info.addr);
1611 kfree(switchdev_work);
1612 dev_put(dev);
1613}
1614
1615static int
1616dsa_slave_switchdev_fdb_work_init(struct dsa_switchdev_event_work *
1617 switchdev_work,
1618 const struct switchdev_notifier_fdb_info *
1619 fdb_info)
1620{
1621 memcpy(&switchdev_work->fdb_info, fdb_info,
1622 sizeof(switchdev_work->fdb_info));
1623 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
1624 if (!switchdev_work->fdb_info.addr)
1625 return -ENOMEM;
1626 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
1627 fdb_info->addr);
1628 return 0;
1629}
1630
1631
1632static int dsa_slave_switchdev_event(struct notifier_block *unused,
1633 unsigned long event, void *ptr)
1634{
1635 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
1636 struct dsa_switchdev_event_work *switchdev_work;
1637 int err;
1638
1639 if (event == SWITCHDEV_PORT_ATTR_SET) {
1640 err = switchdev_handle_port_attr_set(dev, ptr,
1641 dsa_slave_dev_check,
1642 dsa_slave_port_attr_set);
1643 return notifier_from_errno(err);
1644 }
1645
1646 if (!dsa_slave_dev_check(dev))
1647 return NOTIFY_DONE;
1648
1649 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
1650 if (!switchdev_work)
1651 return NOTIFY_BAD;
1652
1653 INIT_WORK(&switchdev_work->work,
1654 dsa_slave_switchdev_event_work);
1655 switchdev_work->dev = dev;
1656 switchdev_work->event = event;
1657
1658 switch (event) {
1659 case SWITCHDEV_FDB_ADD_TO_DEVICE:
1660 case SWITCHDEV_FDB_DEL_TO_DEVICE:
1661 if (dsa_slave_switchdev_fdb_work_init(switchdev_work, ptr))
1662 goto err_fdb_work_init;
1663 dev_hold(dev);
1664 break;
1665 default:
1666 kfree(switchdev_work);
1667 return NOTIFY_DONE;
1668 }
1669
1670 dsa_schedule_work(&switchdev_work->work);
1671 return NOTIFY_OK;
1672
1673err_fdb_work_init:
1674 kfree(switchdev_work);
1675 return NOTIFY_BAD;
1676}
1677
1678static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
1679 unsigned long event, void *ptr)
1680{
1681 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
1682 int err;
1683
1684 switch (event) {
1685 case SWITCHDEV_PORT_OBJ_ADD:
1686 err = switchdev_handle_port_obj_add(dev, ptr,
1687 dsa_slave_dev_check,
1688 dsa_slave_port_obj_add);
1689 return notifier_from_errno(err);
1690 case SWITCHDEV_PORT_OBJ_DEL:
1691 err = switchdev_handle_port_obj_del(dev, ptr,
1692 dsa_slave_dev_check,
1693 dsa_slave_port_obj_del);
1694 return notifier_from_errno(err);
1695 case SWITCHDEV_PORT_ATTR_SET:
1696 err = switchdev_handle_port_attr_set(dev, ptr,
1697 dsa_slave_dev_check,
1698 dsa_slave_port_attr_set);
1699 return notifier_from_errno(err);
1700 }
1701
1702 return NOTIFY_DONE;
1703}
1704
1705static struct notifier_block dsa_slave_nb __read_mostly = {
1706 .notifier_call = dsa_slave_netdevice_event,
1707};
1708
1709static struct notifier_block dsa_slave_switchdev_notifier = {
1710 .notifier_call = dsa_slave_switchdev_event,
1711};
1712
1713static struct notifier_block dsa_slave_switchdev_blocking_notifier = {
1714 .notifier_call = dsa_slave_switchdev_blocking_event,
1715};
1716
1717int dsa_slave_register_notifier(void)
1718{
1719 struct notifier_block *nb;
1720 int err;
1721
1722 err = register_netdevice_notifier(&dsa_slave_nb);
1723 if (err)
1724 return err;
1725
1726 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
1727 if (err)
1728 goto err_switchdev_nb;
1729
1730 nb = &dsa_slave_switchdev_blocking_notifier;
1731 err = register_switchdev_blocking_notifier(nb);
1732 if (err)
1733 goto err_switchdev_blocking_nb;
1734
1735 return 0;
1736
1737err_switchdev_blocking_nb:
1738 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
1739err_switchdev_nb:
1740 unregister_netdevice_notifier(&dsa_slave_nb);
1741 return err;
1742}
1743
1744void dsa_slave_unregister_notifier(void)
1745{
1746 struct notifier_block *nb;
1747 int err;
1748
1749 nb = &dsa_slave_switchdev_blocking_notifier;
1750 err = unregister_switchdev_blocking_notifier(nb);
1751 if (err)
1752 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
1753
1754 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
1755 if (err)
1756 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
1757
1758 err = unregister_netdevice_notifier(&dsa_slave_nb);
1759 if (err)
1760 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
1761}
1762
