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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/if_hsr.h>
21#include <linux/netpoll.h>
22#include <linux/ptp_classify.h>
23
24#include "dsa_priv.h"
25
26
27static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
28{
29 struct dsa_switch *ds = bus->priv;
30
31 if (ds->phys_mii_mask & (1 << addr))
32 return ds->ops->phy_read(ds, addr, reg);
33
34 return 0xffff;
35}
36
37static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
38{
39 struct dsa_switch *ds = bus->priv;
40
41 if (ds->phys_mii_mask & (1 << addr))
42 return ds->ops->phy_write(ds, addr, reg, val);
43
44 return 0;
45}
46
47void dsa_slave_mii_bus_init(struct dsa_switch *ds)
48{
49 ds->slave_mii_bus->priv = (void *)ds;
50 ds->slave_mii_bus->name = "dsa slave smi";
51 ds->slave_mii_bus->read = dsa_slave_phy_read;
52 ds->slave_mii_bus->write = dsa_slave_phy_write;
53 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
54 ds->dst->index, ds->index);
55 ds->slave_mii_bus->parent = ds->dev;
56 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
57}
58
59
60
61static int dsa_slave_get_iflink(const struct net_device *dev)
62{
63 return dsa_slave_to_master(dev)->ifindex;
64}
65
66static int dsa_slave_open(struct net_device *dev)
67{
68 struct net_device *master = dsa_slave_to_master(dev);
69 struct dsa_port *dp = dsa_slave_to_port(dev);
70 int err;
71
72 err = dev_open(master, NULL);
73 if (err < 0) {
74 netdev_err(dev, "failed to open master %s\n", master->name);
75 goto out;
76 }
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_rt(dp, dev->phydev);
96 if (err)
97 goto clear_promisc;
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 dsa_port_disable_rt(dp);
120
121 dev_mc_unsync(master, dev);
122 dev_uc_unsync(master, dev);
123 if (dev->flags & IFF_ALLMULTI)
124 dev_set_allmulti(master, -1);
125 if (dev->flags & IFF_PROMISC)
126 dev_set_promiscuity(master, -1);
127
128 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
129 dev_uc_del(master, dev->dev_addr);
130
131 return 0;
132}
133
134static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
135{
136 struct net_device *master = dsa_slave_to_master(dev);
137 if (dev->flags & IFF_UP) {
138 if (change & IFF_ALLMULTI)
139 dev_set_allmulti(master,
140 dev->flags & IFF_ALLMULTI ? 1 : -1);
141 if (change & IFF_PROMISC)
142 dev_set_promiscuity(master,
143 dev->flags & IFF_PROMISC ? 1 : -1);
144 }
145}
146
147static void dsa_slave_set_rx_mode(struct net_device *dev)
148{
149 struct net_device *master = dsa_slave_to_master(dev);
150
151 dev_mc_sync(master, dev);
152 dev_uc_sync(master, dev);
153}
154
155static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
156{
157 struct net_device *master = dsa_slave_to_master(dev);
158 struct sockaddr *addr = a;
159 int err;
160
161 if (!is_valid_ether_addr(addr->sa_data))
162 return -EADDRNOTAVAIL;
163
164 if (!(dev->flags & IFF_UP))
165 goto out;
166
167 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
168 err = dev_uc_add(master, addr->sa_data);
169 if (err < 0)
170 return err;
171 }
172
173 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
174 dev_uc_del(master, dev->dev_addr);
175
176out:
177 ether_addr_copy(dev->dev_addr, addr->sa_data);
178
179 return 0;
180}
181
182struct dsa_slave_dump_ctx {
183 struct net_device *dev;
184 struct sk_buff *skb;
185 struct netlink_callback *cb;
186 int idx;
187};
188
189static int
190dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid,
191 bool is_static, void *data)
192{
193 struct dsa_slave_dump_ctx *dump = data;
194 u32 portid = NETLINK_CB(dump->cb->skb).portid;
195 u32 seq = dump->cb->nlh->nlmsg_seq;
196 struct nlmsghdr *nlh;
197 struct ndmsg *ndm;
198
199 if (dump->idx < dump->cb->args[2])
200 goto skip;
201
202 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
203 sizeof(*ndm), NLM_F_MULTI);
204 if (!nlh)
205 return -EMSGSIZE;
206
207 ndm = nlmsg_data(nlh);
208 ndm->ndm_family = AF_BRIDGE;
209 ndm->ndm_pad1 = 0;
210 ndm->ndm_pad2 = 0;
211 ndm->ndm_flags = NTF_SELF;
212 ndm->ndm_type = 0;
213 ndm->ndm_ifindex = dump->dev->ifindex;
214 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
215
216 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
217 goto nla_put_failure;
218
219 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
220 goto nla_put_failure;
221
222 nlmsg_end(dump->skb, nlh);
223
224skip:
225 dump->idx++;
226 return 0;
227
228nla_put_failure:
229 nlmsg_cancel(dump->skb, nlh);
230 return -EMSGSIZE;
231}
232
233static int
234dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
235 struct net_device *dev, struct net_device *filter_dev,
236 int *idx)
237{
238 struct dsa_port *dp = dsa_slave_to_port(dev);
239 struct dsa_slave_dump_ctx dump = {
240 .dev = dev,
241 .skb = skb,
242 .cb = cb,
243 .idx = *idx,
244 };
245 int err;
246
247 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump);
248 *idx = dump.idx;
249
250 return err;
251}
252
253static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
254{
255 struct dsa_slave_priv *p = netdev_priv(dev);
256 struct dsa_switch *ds = p->dp->ds;
257 int port = p->dp->index;
258
259
260 switch (cmd) {
261 case SIOCGHWTSTAMP:
262 if (ds->ops->port_hwtstamp_get)
263 return ds->ops->port_hwtstamp_get(ds, port, ifr);
264 break;
265 case SIOCSHWTSTAMP:
266 if (ds->ops->port_hwtstamp_set)
267 return ds->ops->port_hwtstamp_set(ds, port, ifr);
268 break;
269 }
270
271 return phylink_mii_ioctl(p->dp->pl, ifr, cmd);
272}
273
274static int dsa_slave_port_attr_set(struct net_device *dev,
275 const struct switchdev_attr *attr,
276 struct netlink_ext_ack *extack)
277{
278 struct dsa_port *dp = dsa_slave_to_port(dev);
279 int ret;
280
281 switch (attr->id) {
282 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
283 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
284 return -EOPNOTSUPP;
285
286 ret = dsa_port_set_state(dp, attr->u.stp_state);
287 break;
288 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
289 if (!dsa_port_offloads_bridge(dp, attr->orig_dev))
290 return -EOPNOTSUPP;
291
292 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
293 extack);
294 break;
295 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
296 if (!dsa_port_offloads_bridge(dp, attr->orig_dev))
297 return -EOPNOTSUPP;
298
299 ret = dsa_port_ageing_time(dp, attr->u.ageing_time);
300 break;
301 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
302 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
303 return -EOPNOTSUPP;
304
305 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags,
306 extack);
307 break;
308 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
309 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
310 return -EOPNOTSUPP;
311
312 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack);
313 break;
314 case SWITCHDEV_ATTR_ID_BRIDGE_MROUTER:
315 if (!dsa_port_offloads_bridge(dp, attr->orig_dev))
316 return -EOPNOTSUPP;
317
318 ret = dsa_port_mrouter(dp->cpu_dp, attr->u.mrouter, extack);
319 break;
320 default:
321 ret = -EOPNOTSUPP;
322 break;
323 }
324
325 return ret;
326}
327
328
329static int
330dsa_slave_vlan_check_for_8021q_uppers(struct net_device *slave,
331 const struct switchdev_obj_port_vlan *vlan)
332{
333 struct net_device *upper_dev;
334 struct list_head *iter;
335
336 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) {
337 u16 vid;
338
339 if (!is_vlan_dev(upper_dev))
340 continue;
341
342 vid = vlan_dev_vlan_id(upper_dev);
343 if (vid == vlan->vid)
344 return -EBUSY;
345 }
346
347 return 0;
348}
349
350static int dsa_slave_vlan_add(struct net_device *dev,
351 const struct switchdev_obj *obj,
352 struct netlink_ext_ack *extack)
353{
354 struct net_device *master = dsa_slave_to_master(dev);
355 struct dsa_port *dp = dsa_slave_to_port(dev);
356 struct switchdev_obj_port_vlan vlan;
357 int err;
358
359 if (dsa_port_skip_vlan_configuration(dp)) {
360 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN");
361 return 0;
362 }
363
364 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj);
365
366
367
368
369 if (br_vlan_enabled(dp->bridge_dev)) {
370 rcu_read_lock();
371 err = dsa_slave_vlan_check_for_8021q_uppers(dev, &vlan);
372 rcu_read_unlock();
373 if (err) {
374 NL_SET_ERR_MSG_MOD(extack,
375 "Port already has a VLAN upper with this VID");
376 return err;
377 }
378 }
379
380 err = dsa_port_vlan_add(dp, &vlan, extack);
381 if (err)
382 return err;
383
384
385
386
387
388 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID;
389
390 err = dsa_port_vlan_add(dp->cpu_dp, &vlan, extack);
391 if (err)
392 return err;
393
394 return vlan_vid_add(master, htons(ETH_P_8021Q), vlan.vid);
395}
396
397static int dsa_slave_port_obj_add(struct net_device *dev,
398 const struct switchdev_obj *obj,
399 struct netlink_ext_ack *extack)
400{
401 struct dsa_port *dp = dsa_slave_to_port(dev);
402 int err;
403
404 switch (obj->id) {
405 case SWITCHDEV_OBJ_ID_PORT_MDB:
406 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
407 return -EOPNOTSUPP;
408
409 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
410 break;
411 case SWITCHDEV_OBJ_ID_HOST_MDB:
412 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
413 return -EOPNOTSUPP;
414
415
416
417
418 err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj));
419 break;
420 case SWITCHDEV_OBJ_ID_PORT_VLAN:
421 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
422 return -EOPNOTSUPP;
423
424 err = dsa_slave_vlan_add(dev, obj, extack);
425 break;
426 case SWITCHDEV_OBJ_ID_MRP:
427 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
428 return -EOPNOTSUPP;
429
430 err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj));
431 break;
432 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
433 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
434 return -EOPNOTSUPP;
435
436 err = dsa_port_mrp_add_ring_role(dp,
437 SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
438 break;
439 default:
440 err = -EOPNOTSUPP;
441 break;
442 }
443
444 return err;
445}
446
447static int dsa_slave_vlan_del(struct net_device *dev,
448 const struct switchdev_obj *obj)
449{
450 struct net_device *master = dsa_slave_to_master(dev);
451 struct dsa_port *dp = dsa_slave_to_port(dev);
452 struct switchdev_obj_port_vlan *vlan;
453 int err;
454
455 if (dsa_port_skip_vlan_configuration(dp))
456 return 0;
457
458 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
459
460
461
462
463 err = dsa_port_vlan_del(dp, vlan);
464 if (err)
465 return err;
466
467 vlan_vid_del(master, htons(ETH_P_8021Q), vlan->vid);
468
469 return 0;
470}
471
472static int dsa_slave_port_obj_del(struct net_device *dev,
473 const struct switchdev_obj *obj)
474{
475 struct dsa_port *dp = dsa_slave_to_port(dev);
476 int err;
477
478 switch (obj->id) {
479 case SWITCHDEV_OBJ_ID_PORT_MDB:
480 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
481 return -EOPNOTSUPP;
482
483 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
484 break;
485 case SWITCHDEV_OBJ_ID_HOST_MDB:
486 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
487 return -EOPNOTSUPP;
488
489
490
491
492 err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj));
493 break;
494 case SWITCHDEV_OBJ_ID_PORT_VLAN:
495 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
496 return -EOPNOTSUPP;
497
498 err = dsa_slave_vlan_del(dev, obj);
499 break;
500 case SWITCHDEV_OBJ_ID_MRP:
501 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
502 return -EOPNOTSUPP;
503
504 err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj));
505 break;
506 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
507 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
508 return -EOPNOTSUPP;
509
510 err = dsa_port_mrp_del_ring_role(dp,
511 SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
512 break;
513 default:
514 err = -EOPNOTSUPP;
515 break;
516 }
517
518 return err;
519}
520
521static int dsa_slave_get_port_parent_id(struct net_device *dev,
522 struct netdev_phys_item_id *ppid)
523{
524 struct dsa_port *dp = dsa_slave_to_port(dev);
525 struct dsa_switch *ds = dp->ds;
526 struct dsa_switch_tree *dst = ds->dst;
527
528
529
530
531
532 if (dp->ds->devlink)
533 return -EOPNOTSUPP;
534
535 ppid->id_len = sizeof(dst->index);
536 memcpy(&ppid->id, &dst->index, ppid->id_len);
537
538 return 0;
539}
540
541static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
542 struct sk_buff *skb)
543{
544#ifdef CONFIG_NET_POLL_CONTROLLER
545 struct dsa_slave_priv *p = netdev_priv(dev);
546
547 return netpoll_send_skb(p->netpoll, skb);
548#else
549 BUG();
550 return NETDEV_TX_OK;
551#endif
552}
553
554static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
555 struct sk_buff *skb)
556{
557 struct dsa_switch *ds = p->dp->ds;
558 struct sk_buff *clone;
559 unsigned int type;
560
561 type = ptp_classify_raw(skb);
562 if (type == PTP_CLASS_NONE)
563 return;
564
565 if (!ds->ops->port_txtstamp)
566 return;
567
568 clone = skb_clone_sk(skb);
569 if (!clone)
570 return;
571
572 if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type)) {
573 DSA_SKB_CB(skb)->clone = clone;
574 return;
575 }
576
577 kfree_skb(clone);
578}
579
580netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
581{
582
583
584
585 if (unlikely(netpoll_tx_running(dev)))
586 return dsa_slave_netpoll_send_skb(dev, skb);
587
588
589
590
591 skb->dev = dsa_slave_to_master(dev);
592 dev_queue_xmit(skb);
593
594 return NETDEV_TX_OK;
595}
596EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
597
598static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev)
599{
600 int needed_headroom = dev->needed_headroom;
601 int needed_tailroom = dev->needed_tailroom;
602
603
604
605
606
607
608 if (unlikely(needed_tailroom && skb->len < ETH_ZLEN))
609 needed_tailroom += ETH_ZLEN - skb->len;
610
611 needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0);
612 needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0);
613
614 if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb)))
615
616 return 0;
617
618 return pskb_expand_head(skb, needed_headroom, needed_tailroom,
619 GFP_ATOMIC);
620}
621
622static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
623{
624 struct dsa_slave_priv *p = netdev_priv(dev);
625 struct sk_buff *nskb;
626
627 dev_sw_netstats_tx_add(dev, 1, skb->len);
628
629 DSA_SKB_CB(skb)->clone = NULL;
630
631
632
633
634 dsa_skb_tx_timestamp(p, skb);
635
636 if (dsa_realloc_skb(skb, dev)) {
637 dev_kfree_skb_any(skb);
638 return NETDEV_TX_OK;
639 }
640
641
642
643
644 if (dev->needed_tailroom)
645 eth_skb_pad(skb);
646
647
648
649
650 nskb = p->xmit(skb, dev);
651 if (!nskb) {
652 kfree_skb(skb);
653 return NETDEV_TX_OK;
654 }
655
656 return dsa_enqueue_skb(nskb, dev);
657}
658
659
660
661static void dsa_slave_get_drvinfo(struct net_device *dev,
662 struct ethtool_drvinfo *drvinfo)
663{
664 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
665 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
666 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
667}
668
669static int dsa_slave_get_regs_len(struct net_device *dev)
670{
671 struct dsa_port *dp = dsa_slave_to_port(dev);
672 struct dsa_switch *ds = dp->ds;
673
674 if (ds->ops->get_regs_len)
675 return ds->ops->get_regs_len(ds, dp->index);
676
677 return -EOPNOTSUPP;
678}
679
680static void
681dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
682{
683 struct dsa_port *dp = dsa_slave_to_port(dev);
684 struct dsa_switch *ds = dp->ds;
685
686 if (ds->ops->get_regs)
687 ds->ops->get_regs(ds, dp->index, regs, _p);
688}
689
690static int dsa_slave_nway_reset(struct net_device *dev)
691{
692 struct dsa_port *dp = dsa_slave_to_port(dev);
693
694 return phylink_ethtool_nway_reset(dp->pl);
695}
696
697static int dsa_slave_get_eeprom_len(struct net_device *dev)
698{
699 struct dsa_port *dp = dsa_slave_to_port(dev);
700 struct dsa_switch *ds = dp->ds;
701
702 if (ds->cd && ds->cd->eeprom_len)
703 return ds->cd->eeprom_len;
704
705 if (ds->ops->get_eeprom_len)
706 return ds->ops->get_eeprom_len(ds);
707
708 return 0;
709}
710
711static int dsa_slave_get_eeprom(struct net_device *dev,
712 struct ethtool_eeprom *eeprom, u8 *data)
713{
714 struct dsa_port *dp = dsa_slave_to_port(dev);
715 struct dsa_switch *ds = dp->ds;
716
717 if (ds->ops->get_eeprom)
718 return ds->ops->get_eeprom(ds, eeprom, data);
719
720 return -EOPNOTSUPP;
721}
722
723static int dsa_slave_set_eeprom(struct net_device *dev,
724 struct ethtool_eeprom *eeprom, u8 *data)
725{
726 struct dsa_port *dp = dsa_slave_to_port(dev);
727 struct dsa_switch *ds = dp->ds;
728
729 if (ds->ops->set_eeprom)
730 return ds->ops->set_eeprom(ds, eeprom, data);
731
732 return -EOPNOTSUPP;
733}
734
735static void dsa_slave_get_strings(struct net_device *dev,
736 uint32_t stringset, uint8_t *data)
737{
738 struct dsa_port *dp = dsa_slave_to_port(dev);
739 struct dsa_switch *ds = dp->ds;
740
741 if (stringset == ETH_SS_STATS) {
742 int len = ETH_GSTRING_LEN;
743
744 strncpy(data, "tx_packets", len);
745 strncpy(data + len, "tx_bytes", len);
746 strncpy(data + 2 * len, "rx_packets", len);
747 strncpy(data + 3 * len, "rx_bytes", len);
748 if (ds->ops->get_strings)
749 ds->ops->get_strings(ds, dp->index, stringset,
750 data + 4 * len);
751 }
752}
753
754static void dsa_slave_get_ethtool_stats(struct net_device *dev,
755 struct ethtool_stats *stats,
756 uint64_t *data)
757{
758 struct dsa_port *dp = dsa_slave_to_port(dev);
759 struct dsa_switch *ds = dp->ds;
760 struct pcpu_sw_netstats *s;
761 unsigned int start;
762 int i;
763
764 for_each_possible_cpu(i) {
765 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
766
767 s = per_cpu_ptr(dev->tstats, i);
768 do {
769 start = u64_stats_fetch_begin_irq(&s->syncp);
770 tx_packets = s->tx_packets;
771 tx_bytes = s->tx_bytes;
772 rx_packets = s->rx_packets;
773 rx_bytes = s->rx_bytes;
774 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
775 data[0] += tx_packets;
776 data[1] += tx_bytes;
777 data[2] += rx_packets;
778 data[3] += rx_bytes;
779 }
780 if (ds->ops->get_ethtool_stats)
781 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
782}
783
784static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
785{
786 struct dsa_port *dp = dsa_slave_to_port(dev);
787 struct dsa_switch *ds = dp->ds;
788
789 if (sset == ETH_SS_STATS) {
790 int count;
791
792 count = 4;
793 if (ds->ops->get_sset_count)
794 count += ds->ops->get_sset_count(ds, dp->index, sset);
795
796 return count;
797 }
798
799 return -EOPNOTSUPP;
800}
801
802static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
803{
804 struct dsa_port *dp = dsa_slave_to_port(dev);
805 struct dsa_switch *ds = dp->ds;
806
807 phylink_ethtool_get_wol(dp->pl, w);
808
809 if (ds->ops->get_wol)
810 ds->ops->get_wol(ds, dp->index, w);
811}
812
813static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
814{
815 struct dsa_port *dp = dsa_slave_to_port(dev);
816 struct dsa_switch *ds = dp->ds;
817 int ret = -EOPNOTSUPP;
818
819 phylink_ethtool_set_wol(dp->pl, w);
820
821 if (ds->ops->set_wol)
822 ret = ds->ops->set_wol(ds, dp->index, w);
823
824 return ret;
825}
826
827static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
828{
829 struct dsa_port *dp = dsa_slave_to_port(dev);
830 struct dsa_switch *ds = dp->ds;
831 int ret;
832
833
834 if (!dev->phydev || !dp->pl)
835 return -ENODEV;
836
837 if (!ds->ops->set_mac_eee)
838 return -EOPNOTSUPP;
839
840 ret = ds->ops->set_mac_eee(ds, dp->index, e);
841 if (ret)
842 return ret;
843
844 return phylink_ethtool_set_eee(dp->pl, e);
845}
846
847static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
848{
849 struct dsa_port *dp = dsa_slave_to_port(dev);
850 struct dsa_switch *ds = dp->ds;
851 int ret;
852
853
854 if (!dev->phydev || !dp->pl)
855 return -ENODEV;
856
857 if (!ds->ops->get_mac_eee)
858 return -EOPNOTSUPP;
859
860 ret = ds->ops->get_mac_eee(ds, dp->index, e);
861 if (ret)
862 return ret;
863
864 return phylink_ethtool_get_eee(dp->pl, e);
865}
866
867static int dsa_slave_get_link_ksettings(struct net_device *dev,
868 struct ethtool_link_ksettings *cmd)
869{
870 struct dsa_port *dp = dsa_slave_to_port(dev);
871
872 return phylink_ethtool_ksettings_get(dp->pl, cmd);
873}
874
875static int dsa_slave_set_link_ksettings(struct net_device *dev,
876 const struct ethtool_link_ksettings *cmd)
877{
878 struct dsa_port *dp = dsa_slave_to_port(dev);
879
880 return phylink_ethtool_ksettings_set(dp->pl, cmd);
881}
882
883static void dsa_slave_get_pauseparam(struct net_device *dev,
884 struct ethtool_pauseparam *pause)
885{
886 struct dsa_port *dp = dsa_slave_to_port(dev);
887
888 phylink_ethtool_get_pauseparam(dp->pl, pause);
889}
890
891static int dsa_slave_set_pauseparam(struct net_device *dev,
892 struct ethtool_pauseparam *pause)
893{
894 struct dsa_port *dp = dsa_slave_to_port(dev);
895
896 return phylink_ethtool_set_pauseparam(dp->pl, pause);
897}
898
899#ifdef CONFIG_NET_POLL_CONTROLLER
900static int dsa_slave_netpoll_setup(struct net_device *dev,
901 struct netpoll_info *ni)
902{
903 struct net_device *master = dsa_slave_to_master(dev);
904 struct dsa_slave_priv *p = netdev_priv(dev);
905 struct netpoll *netpoll;
906 int err = 0;
907
908 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
909 if (!netpoll)
910 return -ENOMEM;
911
912 err = __netpoll_setup(netpoll, master);
913 if (err) {
914 kfree(netpoll);
915 goto out;
916 }
917
918 p->netpoll = netpoll;
919out:
920 return err;
921}
922
923static void dsa_slave_netpoll_cleanup(struct net_device *dev)
924{
925 struct dsa_slave_priv *p = netdev_priv(dev);
926 struct netpoll *netpoll = p->netpoll;
927
928 if (!netpoll)
929 return;
930
931 p->netpoll = NULL;
932
933 __netpoll_free(netpoll);
934}
935
936static void dsa_slave_poll_controller(struct net_device *dev)
937{
938}
939#endif
940
941static int dsa_slave_get_phys_port_name(struct net_device *dev,
942 char *name, size_t len)
943{
944 struct dsa_port *dp = dsa_slave_to_port(dev);
945
946
947
948
949
950 if (dp->ds->devlink)
951 return -EOPNOTSUPP;
952
953 if (snprintf(name, len, "p%d", dp->index) >= len)
954 return -EINVAL;
955
956 return 0;
957}
958
959static struct dsa_mall_tc_entry *
960dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
961{
962 struct dsa_slave_priv *p = netdev_priv(dev);
963 struct dsa_mall_tc_entry *mall_tc_entry;
964
965 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
966 if (mall_tc_entry->cookie == cookie)
967 return mall_tc_entry;
968
969 return NULL;
970}
971
972static int
973dsa_slave_add_cls_matchall_mirred(struct net_device *dev,
974 struct tc_cls_matchall_offload *cls,
975 bool ingress)
976{
977 struct dsa_port *dp = dsa_slave_to_port(dev);
978 struct dsa_slave_priv *p = netdev_priv(dev);
979 struct dsa_mall_mirror_tc_entry *mirror;
980 struct dsa_mall_tc_entry *mall_tc_entry;
981 struct dsa_switch *ds = dp->ds;
982 struct flow_action_entry *act;
983 struct dsa_port *to_dp;
984 int err;
985
986 if (!ds->ops->port_mirror_add)
987 return -EOPNOTSUPP;
988
989 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
990 cls->common.extack))
991 return -EOPNOTSUPP;
992
993 act = &cls->rule->action.entries[0];
994
995 if (!act->dev)
996 return -EINVAL;
997
998 if (!dsa_slave_dev_check(act->dev))
999 return -EOPNOTSUPP;
1000
1001 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1002 if (!mall_tc_entry)
1003 return -ENOMEM;
1004
1005 mall_tc_entry->cookie = cls->cookie;
1006 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
1007 mirror = &mall_tc_entry->mirror;
1008
1009 to_dp = dsa_slave_to_port(act->dev);
1010
1011 mirror->to_local_port = to_dp->index;
1012 mirror->ingress = ingress;
1013
1014 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
1015 if (err) {
1016 kfree(mall_tc_entry);
1017 return err;
1018 }
1019
1020 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
1021
1022 return err;
1023}
1024
1025static int
1026dsa_slave_add_cls_matchall_police(struct net_device *dev,
1027 struct tc_cls_matchall_offload *cls,
1028 bool ingress)
1029{
1030 struct netlink_ext_ack *extack = cls->common.extack;
1031 struct dsa_port *dp = dsa_slave_to_port(dev);
1032 struct dsa_slave_priv *p = netdev_priv(dev);
1033 struct dsa_mall_policer_tc_entry *policer;
1034 struct dsa_mall_tc_entry *mall_tc_entry;
1035 struct dsa_switch *ds = dp->ds;
1036 struct flow_action_entry *act;
1037 int err;
1038
1039 if (!ds->ops->port_policer_add) {
1040 NL_SET_ERR_MSG_MOD(extack,
1041 "Policing offload not implemented");
1042 return -EOPNOTSUPP;
1043 }
1044
1045 if (!ingress) {
1046 NL_SET_ERR_MSG_MOD(extack,
1047 "Only supported on ingress qdisc");
1048 return -EOPNOTSUPP;
1049 }
1050
1051 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
1052 cls->common.extack))
1053 return -EOPNOTSUPP;
1054
1055 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) {
1056 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) {
1057 NL_SET_ERR_MSG_MOD(extack,
1058 "Only one port policer allowed");
1059 return -EEXIST;
1060 }
1061 }
1062
1063 act = &cls->rule->action.entries[0];
1064
1065 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1066 if (!mall_tc_entry)
1067 return -ENOMEM;
1068
1069 mall_tc_entry->cookie = cls->cookie;
1070 mall_tc_entry->type = DSA_PORT_MALL_POLICER;
1071 policer = &mall_tc_entry->policer;
1072 policer->rate_bytes_per_sec = act->police.rate_bytes_ps;
1073 policer->burst = act->police.burst;
1074
1075 err = ds->ops->port_policer_add(ds, dp->index, policer);
1076 if (err) {
1077 kfree(mall_tc_entry);
1078 return err;
1079 }
1080
1081 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
1082
1083 return err;
1084}
1085
1086static int dsa_slave_add_cls_matchall(struct net_device *dev,
1087 struct tc_cls_matchall_offload *cls,
1088 bool ingress)
1089{
1090 int err = -EOPNOTSUPP;
1091
1092 if (cls->common.protocol == htons(ETH_P_ALL) &&
1093 flow_offload_has_one_action(&cls->rule->action) &&
1094 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED)
1095 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress);
1096 else if (flow_offload_has_one_action(&cls->rule->action) &&
1097 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE)
1098 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress);
1099
1100 return err;
1101}
1102
1103static void dsa_slave_del_cls_matchall(struct net_device *dev,
1104 struct tc_cls_matchall_offload *cls)
1105{
1106 struct dsa_port *dp = dsa_slave_to_port(dev);
1107 struct dsa_mall_tc_entry *mall_tc_entry;
1108 struct dsa_switch *ds = dp->ds;
1109
1110 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
1111 if (!mall_tc_entry)
1112 return;
1113
1114 list_del(&mall_tc_entry->list);
1115
1116 switch (mall_tc_entry->type) {
1117 case DSA_PORT_MALL_MIRROR:
1118 if (ds->ops->port_mirror_del)
1119 ds->ops->port_mirror_del(ds, dp->index,
1120 &mall_tc_entry->mirror);
1121 break;
1122 case DSA_PORT_MALL_POLICER:
1123 if (ds->ops->port_policer_del)
1124 ds->ops->port_policer_del(ds, dp->index);
1125 break;
1126 default:
1127 WARN_ON(1);
1128 }
1129
1130 kfree(mall_tc_entry);
1131}
1132
1133static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
1134 struct tc_cls_matchall_offload *cls,
1135 bool ingress)
1136{
1137 if (cls->common.chain_index)
1138 return -EOPNOTSUPP;
1139
1140 switch (cls->command) {
1141 case TC_CLSMATCHALL_REPLACE:
1142 return dsa_slave_add_cls_matchall(dev, cls, ingress);
1143 case TC_CLSMATCHALL_DESTROY:
1144 dsa_slave_del_cls_matchall(dev, cls);
1145 return 0;
1146 default:
1147 return -EOPNOTSUPP;
1148 }
1149}
1150
1151static int dsa_slave_add_cls_flower(struct net_device *dev,
1152 struct flow_cls_offload *cls,
1153 bool ingress)
1154{
1155 struct dsa_port *dp = dsa_slave_to_port(dev);
1156 struct dsa_switch *ds = dp->ds;
1157 int port = dp->index;
1158
1159 if (!ds->ops->cls_flower_add)
1160 return -EOPNOTSUPP;
1161
1162 return ds->ops->cls_flower_add(ds, port, cls, ingress);
1163}
1164
1165static int dsa_slave_del_cls_flower(struct net_device *dev,
1166 struct flow_cls_offload *cls,
1167 bool ingress)
1168{
1169 struct dsa_port *dp = dsa_slave_to_port(dev);
1170 struct dsa_switch *ds = dp->ds;
1171 int port = dp->index;
1172
1173 if (!ds->ops->cls_flower_del)
1174 return -EOPNOTSUPP;
1175
1176 return ds->ops->cls_flower_del(ds, port, cls, ingress);
1177}
1178
1179static int dsa_slave_stats_cls_flower(struct net_device *dev,
1180 struct flow_cls_offload *cls,
1181 bool ingress)
1182{
1183 struct dsa_port *dp = dsa_slave_to_port(dev);
1184 struct dsa_switch *ds = dp->ds;
1185 int port = dp->index;
1186
1187 if (!ds->ops->cls_flower_stats)
1188 return -EOPNOTSUPP;
1189
1190 return ds->ops->cls_flower_stats(ds, port, cls, ingress);
1191}
1192
1193static int dsa_slave_setup_tc_cls_flower(struct net_device *dev,
1194 struct flow_cls_offload *cls,
1195 bool ingress)
1196{
1197 switch (cls->command) {
1198 case FLOW_CLS_REPLACE:
1199 return dsa_slave_add_cls_flower(dev, cls, ingress);
1200 case FLOW_CLS_DESTROY:
1201 return dsa_slave_del_cls_flower(dev, cls, ingress);
1202 case FLOW_CLS_STATS:
1203 return dsa_slave_stats_cls_flower(dev, cls, ingress);
1204 default:
1205 return -EOPNOTSUPP;
1206 }
1207}
1208
1209static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
1210 void *cb_priv, bool ingress)
1211{
1212 struct net_device *dev = cb_priv;
1213
1214 if (!tc_can_offload(dev))
1215 return -EOPNOTSUPP;
1216
1217 switch (type) {
1218 case TC_SETUP_CLSMATCHALL:
1219 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
1220 case TC_SETUP_CLSFLOWER:
1221 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress);
1222 default:
1223 return -EOPNOTSUPP;
1224 }
1225}
1226
1227static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
1228 void *type_data, void *cb_priv)
1229{
1230 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
1231}
1232
1233static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
1234 void *type_data, void *cb_priv)
1235{
1236 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
1237}
1238
1239static LIST_HEAD(dsa_slave_block_cb_list);
1240
1241static int dsa_slave_setup_tc_block(struct net_device *dev,
1242 struct flow_block_offload *f)
1243{
1244 struct flow_block_cb *block_cb;
1245 flow_setup_cb_t *cb;
1246
1247 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
1248 cb = dsa_slave_setup_tc_block_cb_ig;
1249 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
1250 cb = dsa_slave_setup_tc_block_cb_eg;
1251 else
1252 return -EOPNOTSUPP;
1253
1254 f->driver_block_list = &dsa_slave_block_cb_list;
1255
1256 switch (f->command) {
1257 case FLOW_BLOCK_BIND:
1258 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list))
1259 return -EBUSY;
1260
1261 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL);
1262 if (IS_ERR(block_cb))
1263 return PTR_ERR(block_cb);
1264
1265 flow_block_cb_add(block_cb, f);
1266 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list);
1267 return 0;
1268 case FLOW_BLOCK_UNBIND:
1269 block_cb = flow_block_cb_lookup(f->block, cb, dev);
1270 if (!block_cb)
1271 return -ENOENT;
1272
1273 flow_block_cb_remove(block_cb, f);
1274 list_del(&block_cb->driver_list);
1275 return 0;
1276 default:
1277 return -EOPNOTSUPP;
1278 }
1279}
1280
1281static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
1282 void *type_data)
1283{
1284 struct dsa_port *dp = dsa_slave_to_port(dev);
1285 struct dsa_switch *ds = dp->ds;
1286
1287 if (type == TC_SETUP_BLOCK)
1288 return dsa_slave_setup_tc_block(dev, type_data);
1289
1290 if (!ds->ops->port_setup_tc)
1291 return -EOPNOTSUPP;
1292
1293 return ds->ops->port_setup_tc(ds, dp->index, type, type_data);
1294}
1295
1296static int dsa_slave_get_rxnfc(struct net_device *dev,
1297 struct ethtool_rxnfc *nfc, u32 *rule_locs)
1298{
1299 struct dsa_port *dp = dsa_slave_to_port(dev);
1300 struct dsa_switch *ds = dp->ds;
1301
1302 if (!ds->ops->get_rxnfc)
1303 return -EOPNOTSUPP;
1304
1305 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
1306}
1307
1308static int dsa_slave_set_rxnfc(struct net_device *dev,
1309 struct ethtool_rxnfc *nfc)
1310{
1311 struct dsa_port *dp = dsa_slave_to_port(dev);
1312 struct dsa_switch *ds = dp->ds;
1313
1314 if (!ds->ops->set_rxnfc)
1315 return -EOPNOTSUPP;
1316
1317 return ds->ops->set_rxnfc(ds, dp->index, nfc);
1318}
1319
1320static int dsa_slave_get_ts_info(struct net_device *dev,
1321 struct ethtool_ts_info *ts)
1322{
1323 struct dsa_slave_priv *p = netdev_priv(dev);
1324 struct dsa_switch *ds = p->dp->ds;
1325
1326 if (!ds->ops->get_ts_info)
1327 return -EOPNOTSUPP;
1328
1329 return ds->ops->get_ts_info(ds, p->dp->index, ts);
1330}
1331
1332static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
1333 u16 vid)
1334{
1335 struct net_device *master = dsa_slave_to_master(dev);
1336 struct dsa_port *dp = dsa_slave_to_port(dev);
1337 struct switchdev_obj_port_vlan vlan = {
1338 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
1339 .vid = vid,
1340
1341 .flags = 0,
1342 };
1343 struct netlink_ext_ack extack = {0};
1344 int ret;
1345
1346
1347 ret = dsa_port_vlan_add(dp, &vlan, &extack);
1348 if (ret) {
1349 if (extack._msg)
1350 netdev_err(dev, "%s\n", extack._msg);
1351 return ret;
1352 }
1353
1354
1355 ret = dsa_port_vlan_add(dp->cpu_dp, &vlan, &extack);
1356 if (ret) {
1357 if (extack._msg)
1358 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index,
1359 extack._msg);
1360 return ret;
1361 }
1362
1363 return vlan_vid_add(master, proto, vid);
1364}
1365
1366static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
1367 u16 vid)
1368{
1369 struct net_device *master = dsa_slave_to_master(dev);
1370 struct dsa_port *dp = dsa_slave_to_port(dev);
1371 struct switchdev_obj_port_vlan vlan = {
1372 .vid = vid,
1373
1374 .flags = 0,
1375 };
1376 int err;
1377
1378
1379
1380
1381 err = dsa_port_vlan_del(dp, &vlan);
1382 if (err)
1383 return err;
1384
1385 vlan_vid_del(master, proto, vid);
1386
1387 return 0;
1388}
1389
1390struct dsa_hw_port {
1391 struct list_head list;
1392 struct net_device *dev;
1393 int old_mtu;
1394};
1395
1396static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu)
1397{
1398 const struct dsa_hw_port *p;
1399 int err;
1400
1401 list_for_each_entry(p, hw_port_list, list) {
1402 if (p->dev->mtu == mtu)
1403 continue;
1404
1405 err = dev_set_mtu(p->dev, mtu);
1406 if (err)
1407 goto rollback;
1408 }
1409
1410 return 0;
1411
1412rollback:
1413 list_for_each_entry_continue_reverse(p, hw_port_list, list) {
1414 if (p->dev->mtu == p->old_mtu)
1415 continue;
1416
1417 if (dev_set_mtu(p->dev, p->old_mtu))
1418 netdev_err(p->dev, "Failed to restore MTU\n");
1419 }
1420
1421 return err;
1422}
1423
1424static void dsa_hw_port_list_free(struct list_head *hw_port_list)
1425{
1426 struct dsa_hw_port *p, *n;
1427
1428 list_for_each_entry_safe(p, n, hw_port_list, list)
1429 kfree(p);
1430}
1431
1432
1433static void dsa_bridge_mtu_normalization(struct dsa_port *dp)
1434{
1435 struct list_head hw_port_list;
1436 struct dsa_switch_tree *dst;
1437 int min_mtu = ETH_MAX_MTU;
1438 struct dsa_port *other_dp;
1439 int err;
1440
1441 if (!dp->ds->mtu_enforcement_ingress)
1442 return;
1443
1444 if (!dp->bridge_dev)
1445 return;
1446
1447 INIT_LIST_HEAD(&hw_port_list);
1448
1449
1450
1451
1452 list_for_each_entry(dst, &dsa_tree_list, list) {
1453 list_for_each_entry(other_dp, &dst->ports, list) {
1454 struct dsa_hw_port *hw_port;
1455 struct net_device *slave;
1456
1457 if (other_dp->type != DSA_PORT_TYPE_USER)
1458 continue;
1459
1460 if (other_dp->bridge_dev != dp->bridge_dev)
1461 continue;
1462
1463 if (!other_dp->ds->mtu_enforcement_ingress)
1464 continue;
1465
1466 slave = other_dp->slave;
1467
1468 if (min_mtu > slave->mtu)
1469 min_mtu = slave->mtu;
1470
1471 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL);
1472 if (!hw_port)
1473 goto out;
1474
1475 hw_port->dev = slave;
1476 hw_port->old_mtu = slave->mtu;
1477
1478 list_add(&hw_port->list, &hw_port_list);
1479 }
1480 }
1481
1482
1483
1484
1485
1486 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu);
1487 if (!err)
1488 goto out;
1489
1490
1491
1492
1493
1494 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu);
1495
1496out:
1497 dsa_hw_port_list_free(&hw_port_list);
1498}
1499
1500int dsa_slave_change_mtu(struct net_device *dev, int new_mtu)
1501{
1502 struct net_device *master = dsa_slave_to_master(dev);
1503 struct dsa_port *dp = dsa_slave_to_port(dev);
1504 struct dsa_slave_priv *p = netdev_priv(dev);
1505 struct dsa_switch *ds = p->dp->ds;
1506 struct dsa_port *cpu_dp;
1507 int port = p->dp->index;
1508 int largest_mtu = 0;
1509 int new_master_mtu;
1510 int old_master_mtu;
1511 int mtu_limit;
1512 int cpu_mtu;
1513 int err, i;
1514
1515 if (!ds->ops->port_change_mtu)
1516 return -EOPNOTSUPP;
1517
1518 for (i = 0; i < ds->num_ports; i++) {
1519 int slave_mtu;
1520
1521 if (!dsa_is_user_port(ds, i))
1522 continue;
1523
1524
1525
1526
1527
1528 if (!dsa_to_port(ds, i)->slave)
1529 continue;
1530
1531
1532
1533
1534 if (i == port)
1535 slave_mtu = new_mtu;
1536 else
1537 slave_mtu = dsa_to_port(ds, i)->slave->mtu;
1538
1539 if (largest_mtu < slave_mtu)
1540 largest_mtu = slave_mtu;
1541 }
1542
1543 cpu_dp = dsa_to_port(ds, port)->cpu_dp;
1544
1545 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu);
1546 old_master_mtu = master->mtu;
1547 new_master_mtu = largest_mtu + cpu_dp->tag_ops->overhead;
1548 if (new_master_mtu > mtu_limit)
1549 return -ERANGE;
1550
1551
1552
1553
1554 cpu_mtu = largest_mtu;
1555
1556
1557 if (new_master_mtu != old_master_mtu) {
1558 err = dev_set_mtu(master, new_master_mtu);
1559 if (err < 0)
1560 goto out_master_failed;
1561
1562
1563
1564
1565 err = dsa_port_mtu_change(cpu_dp, cpu_mtu, true);
1566 if (err)
1567 goto out_cpu_failed;
1568 }
1569
1570 err = dsa_port_mtu_change(dp, new_mtu, false);
1571 if (err)
1572 goto out_port_failed;
1573
1574 dev->mtu = new_mtu;
1575
1576 dsa_bridge_mtu_normalization(dp);
1577
1578 return 0;
1579
1580out_port_failed:
1581 if (new_master_mtu != old_master_mtu)
1582 dsa_port_mtu_change(cpu_dp, old_master_mtu -
1583 cpu_dp->tag_ops->overhead,
1584 true);
1585out_cpu_failed:
1586 if (new_master_mtu != old_master_mtu)
1587 dev_set_mtu(master, old_master_mtu);
1588out_master_failed:
1589 return err;
1590}
1591
1592static const struct ethtool_ops dsa_slave_ethtool_ops = {
1593 .get_drvinfo = dsa_slave_get_drvinfo,
1594 .get_regs_len = dsa_slave_get_regs_len,
1595 .get_regs = dsa_slave_get_regs,
1596 .nway_reset = dsa_slave_nway_reset,
1597 .get_link = ethtool_op_get_link,
1598 .get_eeprom_len = dsa_slave_get_eeprom_len,
1599 .get_eeprom = dsa_slave_get_eeprom,
1600 .set_eeprom = dsa_slave_set_eeprom,
1601 .get_strings = dsa_slave_get_strings,
1602 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
1603 .get_sset_count = dsa_slave_get_sset_count,
1604 .set_wol = dsa_slave_set_wol,
1605 .get_wol = dsa_slave_get_wol,
1606 .set_eee = dsa_slave_set_eee,
1607 .get_eee = dsa_slave_get_eee,
1608 .get_link_ksettings = dsa_slave_get_link_ksettings,
1609 .set_link_ksettings = dsa_slave_set_link_ksettings,
1610 .get_pauseparam = dsa_slave_get_pauseparam,
1611 .set_pauseparam = dsa_slave_set_pauseparam,
1612 .get_rxnfc = dsa_slave_get_rxnfc,
1613 .set_rxnfc = dsa_slave_set_rxnfc,
1614 .get_ts_info = dsa_slave_get_ts_info,
1615};
1616
1617
1618static int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
1619 struct net_device *dev,
1620 const unsigned char *addr, u16 vid,
1621 u16 flags,
1622 struct netlink_ext_ack *extack)
1623{
1624 struct dsa_port *dp = dsa_slave_to_port(dev);
1625
1626 return dsa_port_fdb_add(dp, addr, vid);
1627}
1628
1629static int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
1630 struct net_device *dev,
1631 const unsigned char *addr, u16 vid)
1632{
1633 struct dsa_port *dp = dsa_slave_to_port(dev);
1634
1635 return dsa_port_fdb_del(dp, addr, vid);
1636}
1637
1638static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
1639{
1640 struct dsa_port *dp = dsa_slave_to_port(dev);
1641
1642 return dp->ds->devlink ? &dp->devlink_port : NULL;
1643}
1644
1645static void dsa_slave_get_stats64(struct net_device *dev,
1646 struct rtnl_link_stats64 *s)
1647{
1648 struct dsa_port *dp = dsa_slave_to_port(dev);
1649 struct dsa_switch *ds = dp->ds;
1650
1651 if (ds->ops->get_stats64)
1652 ds->ops->get_stats64(ds, dp->index, s);
1653 else
1654 dev_get_tstats64(dev, s);
1655}
1656
1657static const struct net_device_ops dsa_slave_netdev_ops = {
1658 .ndo_open = dsa_slave_open,
1659 .ndo_stop = dsa_slave_close,
1660 .ndo_start_xmit = dsa_slave_xmit,
1661 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
1662 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
1663 .ndo_set_mac_address = dsa_slave_set_mac_address,
1664 .ndo_fdb_add = dsa_legacy_fdb_add,
1665 .ndo_fdb_del = dsa_legacy_fdb_del,
1666 .ndo_fdb_dump = dsa_slave_fdb_dump,
1667 .ndo_do_ioctl = dsa_slave_ioctl,
1668 .ndo_get_iflink = dsa_slave_get_iflink,
1669#ifdef CONFIG_NET_POLL_CONTROLLER
1670 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
1671 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
1672 .ndo_poll_controller = dsa_slave_poll_controller,
1673#endif
1674 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
1675 .ndo_setup_tc = dsa_slave_setup_tc,
1676 .ndo_get_stats64 = dsa_slave_get_stats64,
1677 .ndo_get_port_parent_id = dsa_slave_get_port_parent_id,
1678 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
1679 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
1680 .ndo_get_devlink_port = dsa_slave_get_devlink_port,
1681 .ndo_change_mtu = dsa_slave_change_mtu,
1682};
1683
1684static struct device_type dsa_type = {
1685 .name = "dsa",
1686};
1687
1688void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
1689{
1690 const struct dsa_port *dp = dsa_to_port(ds, port);
1691
1692 if (dp->pl)
1693 phylink_mac_change(dp->pl, up);
1694}
1695EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
1696
1697static void dsa_slave_phylink_fixed_state(struct phylink_config *config,
1698 struct phylink_link_state *state)
1699{
1700 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1701 struct dsa_switch *ds = dp->ds;
1702
1703
1704
1705
1706 ds->ops->phylink_fixed_state(ds, dp->index, state);
1707}
1708
1709
1710static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
1711{
1712 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1713 struct dsa_switch *ds = dp->ds;
1714
1715 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
1716 if (!slave_dev->phydev) {
1717 netdev_err(slave_dev, "no phy at %d\n", addr);
1718 return -ENODEV;
1719 }
1720
1721 return phylink_connect_phy(dp->pl, slave_dev->phydev);
1722}
1723
1724static int dsa_slave_phy_setup(struct net_device *slave_dev)
1725{
1726 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1727 struct device_node *port_dn = dp->dn;
1728 struct dsa_switch *ds = dp->ds;
1729 phy_interface_t mode;
1730 u32 phy_flags = 0;
1731 int ret;
1732
1733 ret = of_get_phy_mode(port_dn, &mode);
1734 if (ret)
1735 mode = PHY_INTERFACE_MODE_NA;
1736
1737 dp->pl_config.dev = &slave_dev->dev;
1738 dp->pl_config.type = PHYLINK_NETDEV;
1739
1740
1741
1742
1743
1744 if (ds->ops->phylink_fixed_state) {
1745 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state;
1746 dp->pl_config.poll_fixed_state = true;
1747 }
1748
1749 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode,
1750 &dsa_port_phylink_mac_ops);
1751 if (IS_ERR(dp->pl)) {
1752 netdev_err(slave_dev,
1753 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1754 return PTR_ERR(dp->pl);
1755 }
1756
1757 if (ds->ops->get_phy_flags)
1758 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
1759
1760 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
1761 if (ret == -ENODEV && ds->slave_mii_bus) {
1762
1763
1764
1765 ret = dsa_slave_phy_connect(slave_dev, dp->index);
1766 if (ret) {
1767 netdev_err(slave_dev,
1768 "failed to connect to port %d: %d\n",
1769 dp->index, ret);
1770 phylink_destroy(dp->pl);
1771 return ret;
1772 }
1773 }
1774
1775 return ret;
1776}
1777
1778void dsa_slave_setup_tagger(struct net_device *slave)
1779{
1780 struct dsa_port *dp = dsa_slave_to_port(slave);
1781 struct dsa_slave_priv *p = netdev_priv(slave);
1782 const struct dsa_port *cpu_dp = dp->cpu_dp;
1783 struct net_device *master = cpu_dp->master;
1784
1785 if (cpu_dp->tag_ops->tail_tag)
1786 slave->needed_tailroom = cpu_dp->tag_ops->overhead;
1787 else
1788 slave->needed_headroom = cpu_dp->tag_ops->overhead;
1789
1790
1791
1792
1793 slave->needed_headroom += master->needed_headroom;
1794 slave->needed_tailroom += master->needed_tailroom;
1795
1796 p->xmit = cpu_dp->tag_ops->xmit;
1797}
1798
1799static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1800static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1801 struct netdev_queue *txq,
1802 void *_unused)
1803{
1804 lockdep_set_class(&txq->_xmit_lock,
1805 &dsa_slave_netdev_xmit_lock_key);
1806}
1807
1808int dsa_slave_suspend(struct net_device *slave_dev)
1809{
1810 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1811
1812 if (!netif_running(slave_dev))
1813 return 0;
1814
1815 netif_device_detach(slave_dev);
1816
1817 rtnl_lock();
1818 phylink_stop(dp->pl);
1819 rtnl_unlock();
1820
1821 return 0;
1822}
1823
1824int dsa_slave_resume(struct net_device *slave_dev)
1825{
1826 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1827
1828 if (!netif_running(slave_dev))
1829 return 0;
1830
1831 netif_device_attach(slave_dev);
1832
1833 rtnl_lock();
1834 phylink_start(dp->pl);
1835 rtnl_unlock();
1836
1837 return 0;
1838}
1839
1840int dsa_slave_create(struct dsa_port *port)
1841{
1842 const struct dsa_port *cpu_dp = port->cpu_dp;
1843 struct net_device *master = cpu_dp->master;
1844 struct dsa_switch *ds = port->ds;
1845 const char *name = port->name;
1846 struct net_device *slave_dev;
1847 struct dsa_slave_priv *p;
1848 int ret;
1849
1850 if (!ds->num_tx_queues)
1851 ds->num_tx_queues = 1;
1852
1853 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
1854 NET_NAME_UNKNOWN, ether_setup,
1855 ds->num_tx_queues, 1);
1856 if (slave_dev == NULL)
1857 return -ENOMEM;
1858
1859 slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
1860 if (ds->ops->port_vlan_add && ds->ops->port_vlan_del)
1861 slave_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1862 slave_dev->hw_features |= NETIF_F_HW_TC;
1863 slave_dev->features |= NETIF_F_LLTX;
1864 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1865 if (!IS_ERR_OR_NULL(port->mac))
1866 ether_addr_copy(slave_dev->dev_addr, port->mac);
1867 else
1868 eth_hw_addr_inherit(slave_dev, master);
1869 slave_dev->priv_flags |= IFF_NO_QUEUE;
1870 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1871 if (ds->ops->port_max_mtu)
1872 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index);
1873 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1874
1875 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1876 NULL);
1877
1878 SET_NETDEV_DEV(slave_dev, port->ds->dev);
1879 slave_dev->dev.of_node = port->dn;
1880 slave_dev->vlan_features = master->vlan_features;
1881
1882 p = netdev_priv(slave_dev);
1883 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1884 if (!slave_dev->tstats) {
1885 free_netdev(slave_dev);
1886 return -ENOMEM;
1887 }
1888
1889 ret = gro_cells_init(&p->gcells, slave_dev);
1890 if (ret)
1891 goto out_free;
1892
1893 p->dp = port;
1894 INIT_LIST_HEAD(&p->mall_tc_list);
1895 port->slave = slave_dev;
1896 dsa_slave_setup_tagger(slave_dev);
1897
1898 rtnl_lock();
1899 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN);
1900 rtnl_unlock();
1901 if (ret && ret != -EOPNOTSUPP)
1902 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n",
1903 ret, ETH_DATA_LEN, port->index);
1904
1905 netif_carrier_off(slave_dev);
1906
1907 ret = dsa_slave_phy_setup(slave_dev);
1908 if (ret) {
1909 netdev_err(slave_dev,
1910 "error %d setting up PHY for tree %d, switch %d, port %d\n",
1911 ret, ds->dst->index, ds->index, port->index);
1912 goto out_gcells;
1913 }
1914
1915 rtnl_lock();
1916
1917 ret = register_netdevice(slave_dev);
1918 if (ret) {
1919 netdev_err(master, "error %d registering interface %s\n",
1920 ret, slave_dev->name);
1921 rtnl_unlock();
1922 goto out_phy;
1923 }
1924
1925 ret = netdev_upper_dev_link(master, slave_dev, NULL);
1926
1927 rtnl_unlock();
1928
1929 if (ret)
1930 goto out_unregister;
1931
1932 return 0;
1933
1934out_unregister:
1935 unregister_netdev(slave_dev);
1936out_phy:
1937 rtnl_lock();
1938 phylink_disconnect_phy(p->dp->pl);
1939 rtnl_unlock();
1940 phylink_destroy(p->dp->pl);
1941out_gcells:
1942 gro_cells_destroy(&p->gcells);
1943out_free:
1944 free_percpu(slave_dev->tstats);
1945 free_netdev(slave_dev);
1946 port->slave = NULL;
1947 return ret;
1948}
1949
1950void dsa_slave_destroy(struct net_device *slave_dev)
1951{
1952 struct net_device *master = dsa_slave_to_master(slave_dev);
1953 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1954 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1955
1956 netif_carrier_off(slave_dev);
1957 rtnl_lock();
1958 netdev_upper_dev_unlink(master, slave_dev);
1959 unregister_netdevice(slave_dev);
1960 phylink_disconnect_phy(dp->pl);
1961 rtnl_unlock();
1962
1963 phylink_destroy(dp->pl);
1964 gro_cells_destroy(&p->gcells);
1965 free_percpu(slave_dev->tstats);
1966 free_netdev(slave_dev);
1967}
1968
1969bool dsa_slave_dev_check(const struct net_device *dev)
1970{
1971 return dev->netdev_ops == &dsa_slave_netdev_ops;
1972}
1973EXPORT_SYMBOL_GPL(dsa_slave_dev_check);
1974
1975static int dsa_slave_changeupper(struct net_device *dev,
1976 struct netdev_notifier_changeupper_info *info)
1977{
1978 struct dsa_port *dp = dsa_slave_to_port(dev);
1979 int err = NOTIFY_DONE;
1980
1981 if (netif_is_bridge_master(info->upper_dev)) {
1982 if (info->linking) {
1983 err = dsa_port_bridge_join(dp, info->upper_dev);
1984 if (!err)
1985 dsa_bridge_mtu_normalization(dp);
1986 err = notifier_from_errno(err);
1987 } else {
1988 dsa_port_bridge_leave(dp, info->upper_dev);
1989 err = NOTIFY_OK;
1990 }
1991 } else if (netif_is_lag_master(info->upper_dev)) {
1992 if (info->linking) {
1993 err = dsa_port_lag_join(dp, info->upper_dev,
1994 info->upper_info);
1995 if (err == -EOPNOTSUPP) {
1996 NL_SET_ERR_MSG_MOD(info->info.extack,
1997 "Offloading not supported");
1998 err = 0;
1999 }
2000 err = notifier_from_errno(err);
2001 } else {
2002 dsa_port_lag_leave(dp, info->upper_dev);
2003 err = NOTIFY_OK;
2004 }
2005 } else if (is_hsr_master(info->upper_dev)) {
2006 if (info->linking) {
2007 err = dsa_port_hsr_join(dp, info->upper_dev);
2008 if (err == -EOPNOTSUPP) {
2009 NL_SET_ERR_MSG_MOD(info->info.extack,
2010 "Offloading not supported");
2011 err = 0;
2012 }
2013 err = notifier_from_errno(err);
2014 } else {
2015 dsa_port_hsr_leave(dp, info->upper_dev);
2016 err = NOTIFY_OK;
2017 }
2018 }
2019
2020 return err;
2021}
2022
2023static int
2024dsa_slave_lag_changeupper(struct net_device *dev,
2025 struct netdev_notifier_changeupper_info *info)
2026{
2027 struct net_device *lower;
2028 struct list_head *iter;
2029 int err = NOTIFY_DONE;
2030 struct dsa_port *dp;
2031
2032 netdev_for_each_lower_dev(dev, lower, iter) {
2033 if (!dsa_slave_dev_check(lower))
2034 continue;
2035
2036 dp = dsa_slave_to_port(lower);
2037 if (!dp->lag_dev)
2038
2039 continue;
2040
2041 err = dsa_slave_changeupper(lower, info);
2042 if (notifier_to_errno(err))
2043 break;
2044 }
2045
2046 return err;
2047}
2048
2049static int
2050dsa_prevent_bridging_8021q_upper(struct net_device *dev,
2051 struct netdev_notifier_changeupper_info *info)
2052{
2053 struct netlink_ext_ack *ext_ack;
2054 struct net_device *slave;
2055 struct dsa_port *dp;
2056
2057 ext_ack = netdev_notifier_info_to_extack(&info->info);
2058
2059 if (!is_vlan_dev(dev))
2060 return NOTIFY_DONE;
2061
2062 slave = vlan_dev_real_dev(dev);
2063 if (!dsa_slave_dev_check(slave))
2064 return NOTIFY_DONE;
2065
2066 dp = dsa_slave_to_port(slave);
2067 if (!dp->bridge_dev)
2068 return NOTIFY_DONE;
2069
2070
2071 if (br_vlan_enabled(dp->bridge_dev) &&
2072 netif_is_bridge_master(info->upper_dev) && info->linking) {
2073 NL_SET_ERR_MSG_MOD(ext_ack,
2074 "Cannot enslave VLAN device into VLAN aware bridge");
2075 return notifier_from_errno(-EINVAL);
2076 }
2077
2078 return NOTIFY_DONE;
2079}
2080
2081static int
2082dsa_slave_check_8021q_upper(struct net_device *dev,
2083 struct netdev_notifier_changeupper_info *info)
2084{
2085 struct dsa_port *dp = dsa_slave_to_port(dev);
2086 struct net_device *br = dp->bridge_dev;
2087 struct bridge_vlan_info br_info;
2088 struct netlink_ext_ack *extack;
2089 int err = NOTIFY_DONE;
2090 u16 vid;
2091
2092 if (!br || !br_vlan_enabled(br))
2093 return NOTIFY_DONE;
2094
2095 extack = netdev_notifier_info_to_extack(&info->info);
2096 vid = vlan_dev_vlan_id(info->upper_dev);
2097
2098
2099
2100
2101
2102 err = br_vlan_get_info(br, vid, &br_info);
2103 if (err == 0) {
2104 NL_SET_ERR_MSG_MOD(extack,
2105 "This VLAN is already configured by the bridge");
2106 return notifier_from_errno(-EBUSY);
2107 }
2108
2109 return NOTIFY_DONE;
2110}
2111
2112static int dsa_slave_netdevice_event(struct notifier_block *nb,
2113 unsigned long event, void *ptr)
2114{
2115 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2116
2117 switch (event) {
2118 case NETDEV_PRECHANGEUPPER: {
2119 struct netdev_notifier_changeupper_info *info = ptr;
2120 struct dsa_switch *ds;
2121 struct dsa_port *dp;
2122 int err;
2123
2124 if (!dsa_slave_dev_check(dev))
2125 return dsa_prevent_bridging_8021q_upper(dev, ptr);
2126
2127 dp = dsa_slave_to_port(dev);
2128 ds = dp->ds;
2129
2130 if (ds->ops->port_prechangeupper) {
2131 err = ds->ops->port_prechangeupper(ds, dp->index, info);
2132 if (err)
2133 return notifier_from_errno(err);
2134 }
2135
2136 if (is_vlan_dev(info->upper_dev))
2137 return dsa_slave_check_8021q_upper(dev, ptr);
2138 break;
2139 }
2140 case NETDEV_CHANGEUPPER:
2141 if (dsa_slave_dev_check(dev))
2142 return dsa_slave_changeupper(dev, ptr);
2143
2144 if (netif_is_lag_master(dev))
2145 return dsa_slave_lag_changeupper(dev, ptr);
2146
2147 break;
2148 case NETDEV_CHANGELOWERSTATE: {
2149 struct netdev_notifier_changelowerstate_info *info = ptr;
2150 struct dsa_port *dp;
2151 int err;
2152
2153 if (!dsa_slave_dev_check(dev))
2154 break;
2155
2156 dp = dsa_slave_to_port(dev);
2157
2158 err = dsa_port_lag_change(dp, info->lower_state_info);
2159 return notifier_from_errno(err);
2160 }
2161 case NETDEV_GOING_DOWN: {
2162 struct dsa_port *dp, *cpu_dp;
2163 struct dsa_switch_tree *dst;
2164 LIST_HEAD(close_list);
2165
2166 if (!netdev_uses_dsa(dev))
2167 return NOTIFY_DONE;
2168
2169 cpu_dp = dev->dsa_ptr;
2170 dst = cpu_dp->ds->dst;
2171
2172 list_for_each_entry(dp, &dst->ports, list) {
2173 if (!dsa_is_user_port(dp->ds, dp->index))
2174 continue;
2175
2176 list_add(&dp->slave->close_list, &close_list);
2177 }
2178
2179 dev_close_many(&close_list, true);
2180
2181 return NOTIFY_OK;
2182 }
2183 default:
2184 break;
2185 }
2186
2187 return NOTIFY_DONE;
2188}
2189
2190static void
2191dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work)
2192{
2193 struct dsa_switch *ds = switchdev_work->ds;
2194 struct switchdev_notifier_fdb_info info;
2195 struct dsa_port *dp;
2196
2197 if (!dsa_is_user_port(ds, switchdev_work->port))
2198 return;
2199
2200 info.addr = switchdev_work->addr;
2201 info.vid = switchdev_work->vid;
2202 info.offloaded = true;
2203 dp = dsa_to_port(ds, switchdev_work->port);
2204 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
2205 dp->slave, &info.info, NULL);
2206}
2207
2208static void dsa_slave_switchdev_event_work(struct work_struct *work)
2209{
2210 struct dsa_switchdev_event_work *switchdev_work =
2211 container_of(work, struct dsa_switchdev_event_work, work);
2212 struct dsa_switch *ds = switchdev_work->ds;
2213 struct dsa_port *dp;
2214 int err;
2215
2216 dp = dsa_to_port(ds, switchdev_work->port);
2217
2218 rtnl_lock();
2219 switch (switchdev_work->event) {
2220 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2221 err = dsa_port_fdb_add(dp, switchdev_work->addr,
2222 switchdev_work->vid);
2223 if (err) {
2224 dev_err(ds->dev,
2225 "port %d failed to add %pM vid %d to fdb: %d\n",
2226 dp->index, switchdev_work->addr,
2227 switchdev_work->vid, err);
2228 break;
2229 }
2230 dsa_fdb_offload_notify(switchdev_work);
2231 break;
2232
2233 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2234 err = dsa_port_fdb_del(dp, switchdev_work->addr,
2235 switchdev_work->vid);
2236 if (err) {
2237 dev_err(ds->dev,
2238 "port %d failed to delete %pM vid %d from fdb: %d\n",
2239 dp->index, switchdev_work->addr,
2240 switchdev_work->vid, err);
2241 }
2242
2243 break;
2244 }
2245 rtnl_unlock();
2246
2247 kfree(switchdev_work);
2248 if (dsa_is_user_port(ds, dp->index))
2249 dev_put(dp->slave);
2250}
2251
2252static int dsa_lower_dev_walk(struct net_device *lower_dev,
2253 struct netdev_nested_priv *priv)
2254{
2255 if (dsa_slave_dev_check(lower_dev)) {
2256 priv->data = (void *)netdev_priv(lower_dev);
2257 return 1;
2258 }
2259
2260 return 0;
2261}
2262
2263static struct dsa_slave_priv *dsa_slave_dev_lower_find(struct net_device *dev)
2264{
2265 struct netdev_nested_priv priv = {
2266 .data = NULL,
2267 };
2268
2269 netdev_walk_all_lower_dev_rcu(dev, dsa_lower_dev_walk, &priv);
2270
2271 return (struct dsa_slave_priv *)priv.data;
2272}
2273
2274
2275static int dsa_slave_switchdev_event(struct notifier_block *unused,
2276 unsigned long event, void *ptr)
2277{
2278 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2279 const struct switchdev_notifier_fdb_info *fdb_info;
2280 struct dsa_switchdev_event_work *switchdev_work;
2281 struct dsa_port *dp;
2282 int err;
2283
2284 switch (event) {
2285 case SWITCHDEV_PORT_ATTR_SET:
2286 err = switchdev_handle_port_attr_set(dev, ptr,
2287 dsa_slave_dev_check,
2288 dsa_slave_port_attr_set);
2289 return notifier_from_errno(err);
2290 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2291 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2292 fdb_info = ptr;
2293
2294 if (dsa_slave_dev_check(dev)) {
2295 if (!fdb_info->added_by_user)
2296 return NOTIFY_OK;
2297
2298 dp = dsa_slave_to_port(dev);
2299 } else {
2300
2301
2302
2303
2304 struct net_device *br_dev;
2305 struct dsa_slave_priv *p;
2306
2307 br_dev = netdev_master_upper_dev_get_rcu(dev);
2308 if (!br_dev)
2309 return NOTIFY_DONE;
2310
2311 if (!netif_is_bridge_master(br_dev))
2312 return NOTIFY_DONE;
2313
2314 p = dsa_slave_dev_lower_find(br_dev);
2315 if (!p)
2316 return NOTIFY_DONE;
2317
2318 dp = p->dp->cpu_dp;
2319
2320 if (!dp->ds->assisted_learning_on_cpu_port)
2321 return NOTIFY_DONE;
2322
2323
2324
2325
2326
2327
2328 if (dsa_tree_offloads_bridge_port(dp->ds->dst, dev))
2329 return NOTIFY_DONE;
2330 }
2331
2332 if (!dp->ds->ops->port_fdb_add || !dp->ds->ops->port_fdb_del)
2333 return NOTIFY_DONE;
2334
2335 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2336 if (!switchdev_work)
2337 return NOTIFY_BAD;
2338
2339 INIT_WORK(&switchdev_work->work,
2340 dsa_slave_switchdev_event_work);
2341 switchdev_work->ds = dp->ds;
2342 switchdev_work->port = dp->index;
2343 switchdev_work->event = event;
2344
2345 ether_addr_copy(switchdev_work->addr,
2346 fdb_info->addr);
2347 switchdev_work->vid = fdb_info->vid;
2348
2349
2350 if (dsa_is_user_port(dp->ds, dp->index))
2351 dev_hold(dev);
2352 dsa_schedule_work(&switchdev_work->work);
2353 break;
2354 default:
2355 return NOTIFY_DONE;
2356 }
2357
2358 return NOTIFY_OK;
2359}
2360
2361static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
2362 unsigned long event, void *ptr)
2363{
2364 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2365 int err;
2366
2367 switch (event) {
2368 case SWITCHDEV_PORT_OBJ_ADD:
2369 err = switchdev_handle_port_obj_add(dev, ptr,
2370 dsa_slave_dev_check,
2371 dsa_slave_port_obj_add);
2372 return notifier_from_errno(err);
2373 case SWITCHDEV_PORT_OBJ_DEL:
2374 err = switchdev_handle_port_obj_del(dev, ptr,
2375 dsa_slave_dev_check,
2376 dsa_slave_port_obj_del);
2377 return notifier_from_errno(err);
2378 case SWITCHDEV_PORT_ATTR_SET:
2379 err = switchdev_handle_port_attr_set(dev, ptr,
2380 dsa_slave_dev_check,
2381 dsa_slave_port_attr_set);
2382 return notifier_from_errno(err);
2383 }
2384
2385 return NOTIFY_DONE;
2386}
2387
2388static struct notifier_block dsa_slave_nb __read_mostly = {
2389 .notifier_call = dsa_slave_netdevice_event,
2390};
2391
2392static struct notifier_block dsa_slave_switchdev_notifier = {
2393 .notifier_call = dsa_slave_switchdev_event,
2394};
2395
2396static struct notifier_block dsa_slave_switchdev_blocking_notifier = {
2397 .notifier_call = dsa_slave_switchdev_blocking_event,
2398};
2399
2400int dsa_slave_register_notifier(void)
2401{
2402 struct notifier_block *nb;
2403 int err;
2404
2405 err = register_netdevice_notifier(&dsa_slave_nb);
2406 if (err)
2407 return err;
2408
2409 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
2410 if (err)
2411 goto err_switchdev_nb;
2412
2413 nb = &dsa_slave_switchdev_blocking_notifier;
2414 err = register_switchdev_blocking_notifier(nb);
2415 if (err)
2416 goto err_switchdev_blocking_nb;
2417
2418 return 0;
2419
2420err_switchdev_blocking_nb:
2421 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2422err_switchdev_nb:
2423 unregister_netdevice_notifier(&dsa_slave_nb);
2424 return err;
2425}
2426
2427void dsa_slave_unregister_notifier(void)
2428{
2429 struct notifier_block *nb;
2430 int err;
2431
2432 nb = &dsa_slave_switchdev_blocking_notifier;
2433 err = unregister_switchdev_blocking_notifier(nb);
2434 if (err)
2435 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
2436
2437 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2438 if (err)
2439 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
2440
2441 err = unregister_netdevice_notifier(&dsa_slave_nb);
2442 if (err)
2443 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
2444}
2445
