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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/selftests.h>
19#include <net/tc_act/tc_mirred.h>
20#include <linux/if_bridge.h>
21#include <linux/if_hsr.h>
22#include <linux/netpoll.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
559 if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))
560 return;
561
562 if (!ds->ops->port_txtstamp)
563 return;
564
565 ds->ops->port_txtstamp(ds, p->dp->index, skb);
566}
567
568netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
569{
570
571
572
573 if (unlikely(netpoll_tx_running(dev)))
574 return dsa_slave_netpoll_send_skb(dev, skb);
575
576
577
578
579 skb->dev = dsa_slave_to_master(dev);
580 dev_queue_xmit(skb);
581
582 return NETDEV_TX_OK;
583}
584EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
585
586static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev)
587{
588 int needed_headroom = dev->needed_headroom;
589 int needed_tailroom = dev->needed_tailroom;
590
591
592
593
594
595
596 if (unlikely(needed_tailroom && skb->len < ETH_ZLEN))
597 needed_tailroom += ETH_ZLEN - skb->len;
598
599 needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0);
600 needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0);
601
602 if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb)))
603
604 return 0;
605
606 return pskb_expand_head(skb, needed_headroom, needed_tailroom,
607 GFP_ATOMIC);
608}
609
610static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
611{
612 struct dsa_slave_priv *p = netdev_priv(dev);
613 struct sk_buff *nskb;
614
615 dev_sw_netstats_tx_add(dev, 1, skb->len);
616
617 memset(skb->cb, 0, sizeof(skb->cb));
618
619
620 dsa_skb_tx_timestamp(p, skb);
621
622 if (dsa_realloc_skb(skb, dev)) {
623 dev_kfree_skb_any(skb);
624 return NETDEV_TX_OK;
625 }
626
627
628
629
630 if (dev->needed_tailroom)
631 eth_skb_pad(skb);
632
633
634
635
636 nskb = p->xmit(skb, dev);
637 if (!nskb) {
638 kfree_skb(skb);
639 return NETDEV_TX_OK;
640 }
641
642 return dsa_enqueue_skb(nskb, dev);
643}
644
645
646
647static void dsa_slave_get_drvinfo(struct net_device *dev,
648 struct ethtool_drvinfo *drvinfo)
649{
650 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
651 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
652 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
653}
654
655static int dsa_slave_get_regs_len(struct net_device *dev)
656{
657 struct dsa_port *dp = dsa_slave_to_port(dev);
658 struct dsa_switch *ds = dp->ds;
659
660 if (ds->ops->get_regs_len)
661 return ds->ops->get_regs_len(ds, dp->index);
662
663 return -EOPNOTSUPP;
664}
665
666static void
667dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
668{
669 struct dsa_port *dp = dsa_slave_to_port(dev);
670 struct dsa_switch *ds = dp->ds;
671
672 if (ds->ops->get_regs)
673 ds->ops->get_regs(ds, dp->index, regs, _p);
674}
675
676static int dsa_slave_nway_reset(struct net_device *dev)
677{
678 struct dsa_port *dp = dsa_slave_to_port(dev);
679
680 return phylink_ethtool_nway_reset(dp->pl);
681}
682
683static int dsa_slave_get_eeprom_len(struct net_device *dev)
684{
685 struct dsa_port *dp = dsa_slave_to_port(dev);
686 struct dsa_switch *ds = dp->ds;
687
688 if (ds->cd && ds->cd->eeprom_len)
689 return ds->cd->eeprom_len;
690
691 if (ds->ops->get_eeprom_len)
692 return ds->ops->get_eeprom_len(ds);
693
694 return 0;
695}
696
697static int dsa_slave_get_eeprom(struct net_device *dev,
698 struct ethtool_eeprom *eeprom, u8 *data)
699{
700 struct dsa_port *dp = dsa_slave_to_port(dev);
701 struct dsa_switch *ds = dp->ds;
702
703 if (ds->ops->get_eeprom)
704 return ds->ops->get_eeprom(ds, eeprom, data);
705
706 return -EOPNOTSUPP;
707}
708
709static int dsa_slave_set_eeprom(struct net_device *dev,
710 struct ethtool_eeprom *eeprom, u8 *data)
711{
712 struct dsa_port *dp = dsa_slave_to_port(dev);
713 struct dsa_switch *ds = dp->ds;
714
715 if (ds->ops->set_eeprom)
716 return ds->ops->set_eeprom(ds, eeprom, data);
717
718 return -EOPNOTSUPP;
719}
720
721static void dsa_slave_get_strings(struct net_device *dev,
722 uint32_t stringset, uint8_t *data)
723{
724 struct dsa_port *dp = dsa_slave_to_port(dev);
725 struct dsa_switch *ds = dp->ds;
726
727 if (stringset == ETH_SS_STATS) {
728 int len = ETH_GSTRING_LEN;
729
730 strncpy(data, "tx_packets", len);
731 strncpy(data + len, "tx_bytes", len);
732 strncpy(data + 2 * len, "rx_packets", len);
733 strncpy(data + 3 * len, "rx_bytes", len);
734 if (ds->ops->get_strings)
735 ds->ops->get_strings(ds, dp->index, stringset,
736 data + 4 * len);
737 } else if (stringset == ETH_SS_TEST) {
738 net_selftest_get_strings(data);
739 }
740
741}
742
743static void dsa_slave_get_ethtool_stats(struct net_device *dev,
744 struct ethtool_stats *stats,
745 uint64_t *data)
746{
747 struct dsa_port *dp = dsa_slave_to_port(dev);
748 struct dsa_switch *ds = dp->ds;
749 struct pcpu_sw_netstats *s;
750 unsigned int start;
751 int i;
752
753 for_each_possible_cpu(i) {
754 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
755
756 s = per_cpu_ptr(dev->tstats, i);
757 do {
758 start = u64_stats_fetch_begin_irq(&s->syncp);
759 tx_packets = s->tx_packets;
760 tx_bytes = s->tx_bytes;
761 rx_packets = s->rx_packets;
762 rx_bytes = s->rx_bytes;
763 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
764 data[0] += tx_packets;
765 data[1] += tx_bytes;
766 data[2] += rx_packets;
767 data[3] += rx_bytes;
768 }
769 if (ds->ops->get_ethtool_stats)
770 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
771}
772
773static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
774{
775 struct dsa_port *dp = dsa_slave_to_port(dev);
776 struct dsa_switch *ds = dp->ds;
777
778 if (sset == ETH_SS_STATS) {
779 int count = 0;
780
781 if (ds->ops->get_sset_count) {
782 count = ds->ops->get_sset_count(ds, dp->index, sset);
783 if (count < 0)
784 return count;
785 }
786
787 return count + 4;
788 } else if (sset == ETH_SS_TEST) {
789 return net_selftest_get_count();
790 }
791
792 return -EOPNOTSUPP;
793}
794
795static void dsa_slave_net_selftest(struct net_device *ndev,
796 struct ethtool_test *etest, u64 *buf)
797{
798 struct dsa_port *dp = dsa_slave_to_port(ndev);
799 struct dsa_switch *ds = dp->ds;
800
801 if (ds->ops->self_test) {
802 ds->ops->self_test(ds, dp->index, etest, buf);
803 return;
804 }
805
806 net_selftest(ndev, etest, buf);
807}
808
809static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
810{
811 struct dsa_port *dp = dsa_slave_to_port(dev);
812 struct dsa_switch *ds = dp->ds;
813
814 phylink_ethtool_get_wol(dp->pl, w);
815
816 if (ds->ops->get_wol)
817 ds->ops->get_wol(ds, dp->index, w);
818}
819
820static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
821{
822 struct dsa_port *dp = dsa_slave_to_port(dev);
823 struct dsa_switch *ds = dp->ds;
824 int ret = -EOPNOTSUPP;
825
826 phylink_ethtool_set_wol(dp->pl, w);
827
828 if (ds->ops->set_wol)
829 ret = ds->ops->set_wol(ds, dp->index, w);
830
831 return ret;
832}
833
834static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
835{
836 struct dsa_port *dp = dsa_slave_to_port(dev);
837 struct dsa_switch *ds = dp->ds;
838 int ret;
839
840
841 if (!dev->phydev || !dp->pl)
842 return -ENODEV;
843
844 if (!ds->ops->set_mac_eee)
845 return -EOPNOTSUPP;
846
847 ret = ds->ops->set_mac_eee(ds, dp->index, e);
848 if (ret)
849 return ret;
850
851 return phylink_ethtool_set_eee(dp->pl, e);
852}
853
854static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
855{
856 struct dsa_port *dp = dsa_slave_to_port(dev);
857 struct dsa_switch *ds = dp->ds;
858 int ret;
859
860
861 if (!dev->phydev || !dp->pl)
862 return -ENODEV;
863
864 if (!ds->ops->get_mac_eee)
865 return -EOPNOTSUPP;
866
867 ret = ds->ops->get_mac_eee(ds, dp->index, e);
868 if (ret)
869 return ret;
870
871 return phylink_ethtool_get_eee(dp->pl, e);
872}
873
874static int dsa_slave_get_link_ksettings(struct net_device *dev,
875 struct ethtool_link_ksettings *cmd)
876{
877 struct dsa_port *dp = dsa_slave_to_port(dev);
878
879 return phylink_ethtool_ksettings_get(dp->pl, cmd);
880}
881
882static int dsa_slave_set_link_ksettings(struct net_device *dev,
883 const struct ethtool_link_ksettings *cmd)
884{
885 struct dsa_port *dp = dsa_slave_to_port(dev);
886
887 return phylink_ethtool_ksettings_set(dp->pl, cmd);
888}
889
890static void dsa_slave_get_pauseparam(struct net_device *dev,
891 struct ethtool_pauseparam *pause)
892{
893 struct dsa_port *dp = dsa_slave_to_port(dev);
894
895 phylink_ethtool_get_pauseparam(dp->pl, pause);
896}
897
898static int dsa_slave_set_pauseparam(struct net_device *dev,
899 struct ethtool_pauseparam *pause)
900{
901 struct dsa_port *dp = dsa_slave_to_port(dev);
902
903 return phylink_ethtool_set_pauseparam(dp->pl, pause);
904}
905
906#ifdef CONFIG_NET_POLL_CONTROLLER
907static int dsa_slave_netpoll_setup(struct net_device *dev,
908 struct netpoll_info *ni)
909{
910 struct net_device *master = dsa_slave_to_master(dev);
911 struct dsa_slave_priv *p = netdev_priv(dev);
912 struct netpoll *netpoll;
913 int err = 0;
914
915 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
916 if (!netpoll)
917 return -ENOMEM;
918
919 err = __netpoll_setup(netpoll, master);
920 if (err) {
921 kfree(netpoll);
922 goto out;
923 }
924
925 p->netpoll = netpoll;
926out:
927 return err;
928}
929
930static void dsa_slave_netpoll_cleanup(struct net_device *dev)
931{
932 struct dsa_slave_priv *p = netdev_priv(dev);
933 struct netpoll *netpoll = p->netpoll;
934
935 if (!netpoll)
936 return;
937
938 p->netpoll = NULL;
939
940 __netpoll_free(netpoll);
941}
942
943static void dsa_slave_poll_controller(struct net_device *dev)
944{
945}
946#endif
947
948static int dsa_slave_get_phys_port_name(struct net_device *dev,
949 char *name, size_t len)
950{
951 struct dsa_port *dp = dsa_slave_to_port(dev);
952
953
954
955
956
957 if (dp->ds->devlink)
958 return -EOPNOTSUPP;
959
960 if (snprintf(name, len, "p%d", dp->index) >= len)
961 return -EINVAL;
962
963 return 0;
964}
965
966static struct dsa_mall_tc_entry *
967dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
968{
969 struct dsa_slave_priv *p = netdev_priv(dev);
970 struct dsa_mall_tc_entry *mall_tc_entry;
971
972 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
973 if (mall_tc_entry->cookie == cookie)
974 return mall_tc_entry;
975
976 return NULL;
977}
978
979static int
980dsa_slave_add_cls_matchall_mirred(struct net_device *dev,
981 struct tc_cls_matchall_offload *cls,
982 bool ingress)
983{
984 struct dsa_port *dp = dsa_slave_to_port(dev);
985 struct dsa_slave_priv *p = netdev_priv(dev);
986 struct dsa_mall_mirror_tc_entry *mirror;
987 struct dsa_mall_tc_entry *mall_tc_entry;
988 struct dsa_switch *ds = dp->ds;
989 struct flow_action_entry *act;
990 struct dsa_port *to_dp;
991 int err;
992
993 if (!ds->ops->port_mirror_add)
994 return -EOPNOTSUPP;
995
996 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
997 cls->common.extack))
998 return -EOPNOTSUPP;
999
1000 act = &cls->rule->action.entries[0];
1001
1002 if (!act->dev)
1003 return -EINVAL;
1004
1005 if (!dsa_slave_dev_check(act->dev))
1006 return -EOPNOTSUPP;
1007
1008 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1009 if (!mall_tc_entry)
1010 return -ENOMEM;
1011
1012 mall_tc_entry->cookie = cls->cookie;
1013 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
1014 mirror = &mall_tc_entry->mirror;
1015
1016 to_dp = dsa_slave_to_port(act->dev);
1017
1018 mirror->to_local_port = to_dp->index;
1019 mirror->ingress = ingress;
1020
1021 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
1022 if (err) {
1023 kfree(mall_tc_entry);
1024 return err;
1025 }
1026
1027 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
1028
1029 return err;
1030}
1031
1032static int
1033dsa_slave_add_cls_matchall_police(struct net_device *dev,
1034 struct tc_cls_matchall_offload *cls,
1035 bool ingress)
1036{
1037 struct netlink_ext_ack *extack = cls->common.extack;
1038 struct dsa_port *dp = dsa_slave_to_port(dev);
1039 struct dsa_slave_priv *p = netdev_priv(dev);
1040 struct dsa_mall_policer_tc_entry *policer;
1041 struct dsa_mall_tc_entry *mall_tc_entry;
1042 struct dsa_switch *ds = dp->ds;
1043 struct flow_action_entry *act;
1044 int err;
1045
1046 if (!ds->ops->port_policer_add) {
1047 NL_SET_ERR_MSG_MOD(extack,
1048 "Policing offload not implemented");
1049 return -EOPNOTSUPP;
1050 }
1051
1052 if (!ingress) {
1053 NL_SET_ERR_MSG_MOD(extack,
1054 "Only supported on ingress qdisc");
1055 return -EOPNOTSUPP;
1056 }
1057
1058 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
1059 cls->common.extack))
1060 return -EOPNOTSUPP;
1061
1062 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) {
1063 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) {
1064 NL_SET_ERR_MSG_MOD(extack,
1065 "Only one port policer allowed");
1066 return -EEXIST;
1067 }
1068 }
1069
1070 act = &cls->rule->action.entries[0];
1071
1072 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1073 if (!mall_tc_entry)
1074 return -ENOMEM;
1075
1076 mall_tc_entry->cookie = cls->cookie;
1077 mall_tc_entry->type = DSA_PORT_MALL_POLICER;
1078 policer = &mall_tc_entry->policer;
1079 policer->rate_bytes_per_sec = act->police.rate_bytes_ps;
1080 policer->burst = act->police.burst;
1081
1082 err = ds->ops->port_policer_add(ds, dp->index, policer);
1083 if (err) {
1084 kfree(mall_tc_entry);
1085 return err;
1086 }
1087
1088 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
1089
1090 return err;
1091}
1092
1093static int dsa_slave_add_cls_matchall(struct net_device *dev,
1094 struct tc_cls_matchall_offload *cls,
1095 bool ingress)
1096{
1097 int err = -EOPNOTSUPP;
1098
1099 if (cls->common.protocol == htons(ETH_P_ALL) &&
1100 flow_offload_has_one_action(&cls->rule->action) &&
1101 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED)
1102 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress);
1103 else if (flow_offload_has_one_action(&cls->rule->action) &&
1104 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE)
1105 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress);
1106
1107 return err;
1108}
1109
1110static void dsa_slave_del_cls_matchall(struct net_device *dev,
1111 struct tc_cls_matchall_offload *cls)
1112{
1113 struct dsa_port *dp = dsa_slave_to_port(dev);
1114 struct dsa_mall_tc_entry *mall_tc_entry;
1115 struct dsa_switch *ds = dp->ds;
1116
1117 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
1118 if (!mall_tc_entry)
1119 return;
1120
1121 list_del(&mall_tc_entry->list);
1122
1123 switch (mall_tc_entry->type) {
1124 case DSA_PORT_MALL_MIRROR:
1125 if (ds->ops->port_mirror_del)
1126 ds->ops->port_mirror_del(ds, dp->index,
1127 &mall_tc_entry->mirror);
1128 break;
1129 case DSA_PORT_MALL_POLICER:
1130 if (ds->ops->port_policer_del)
1131 ds->ops->port_policer_del(ds, dp->index);
1132 break;
1133 default:
1134 WARN_ON(1);
1135 }
1136
1137 kfree(mall_tc_entry);
1138}
1139
1140static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
1141 struct tc_cls_matchall_offload *cls,
1142 bool ingress)
1143{
1144 if (cls->common.chain_index)
1145 return -EOPNOTSUPP;
1146
1147 switch (cls->command) {
1148 case TC_CLSMATCHALL_REPLACE:
1149 return dsa_slave_add_cls_matchall(dev, cls, ingress);
1150 case TC_CLSMATCHALL_DESTROY:
1151 dsa_slave_del_cls_matchall(dev, cls);
1152 return 0;
1153 default:
1154 return -EOPNOTSUPP;
1155 }
1156}
1157
1158static int dsa_slave_add_cls_flower(struct net_device *dev,
1159 struct flow_cls_offload *cls,
1160 bool ingress)
1161{
1162 struct dsa_port *dp = dsa_slave_to_port(dev);
1163 struct dsa_switch *ds = dp->ds;
1164 int port = dp->index;
1165
1166 if (!ds->ops->cls_flower_add)
1167 return -EOPNOTSUPP;
1168
1169 return ds->ops->cls_flower_add(ds, port, cls, ingress);
1170}
1171
1172static int dsa_slave_del_cls_flower(struct net_device *dev,
1173 struct flow_cls_offload *cls,
1174 bool ingress)
1175{
1176 struct dsa_port *dp = dsa_slave_to_port(dev);
1177 struct dsa_switch *ds = dp->ds;
1178 int port = dp->index;
1179
1180 if (!ds->ops->cls_flower_del)
1181 return -EOPNOTSUPP;
1182
1183 return ds->ops->cls_flower_del(ds, port, cls, ingress);
1184}
1185
1186static int dsa_slave_stats_cls_flower(struct net_device *dev,
1187 struct flow_cls_offload *cls,
1188 bool ingress)
1189{
1190 struct dsa_port *dp = dsa_slave_to_port(dev);
1191 struct dsa_switch *ds = dp->ds;
1192 int port = dp->index;
1193
1194 if (!ds->ops->cls_flower_stats)
1195 return -EOPNOTSUPP;
1196
1197 return ds->ops->cls_flower_stats(ds, port, cls, ingress);
1198}
1199
1200static int dsa_slave_setup_tc_cls_flower(struct net_device *dev,
1201 struct flow_cls_offload *cls,
1202 bool ingress)
1203{
1204 switch (cls->command) {
1205 case FLOW_CLS_REPLACE:
1206 return dsa_slave_add_cls_flower(dev, cls, ingress);
1207 case FLOW_CLS_DESTROY:
1208 return dsa_slave_del_cls_flower(dev, cls, ingress);
1209 case FLOW_CLS_STATS:
1210 return dsa_slave_stats_cls_flower(dev, cls, ingress);
1211 default:
1212 return -EOPNOTSUPP;
1213 }
1214}
1215
1216static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
1217 void *cb_priv, bool ingress)
1218{
1219 struct net_device *dev = cb_priv;
1220
1221 if (!tc_can_offload(dev))
1222 return -EOPNOTSUPP;
1223
1224 switch (type) {
1225 case TC_SETUP_CLSMATCHALL:
1226 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
1227 case TC_SETUP_CLSFLOWER:
1228 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress);
1229 default:
1230 return -EOPNOTSUPP;
1231 }
1232}
1233
1234static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
1235 void *type_data, void *cb_priv)
1236{
1237 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
1238}
1239
1240static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
1241 void *type_data, void *cb_priv)
1242{
1243 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
1244}
1245
1246static LIST_HEAD(dsa_slave_block_cb_list);
1247
1248static int dsa_slave_setup_tc_block(struct net_device *dev,
1249 struct flow_block_offload *f)
1250{
1251 struct flow_block_cb *block_cb;
1252 flow_setup_cb_t *cb;
1253
1254 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
1255 cb = dsa_slave_setup_tc_block_cb_ig;
1256 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
1257 cb = dsa_slave_setup_tc_block_cb_eg;
1258 else
1259 return -EOPNOTSUPP;
1260
1261 f->driver_block_list = &dsa_slave_block_cb_list;
1262
1263 switch (f->command) {
1264 case FLOW_BLOCK_BIND:
1265 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list))
1266 return -EBUSY;
1267
1268 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL);
1269 if (IS_ERR(block_cb))
1270 return PTR_ERR(block_cb);
1271
1272 flow_block_cb_add(block_cb, f);
1273 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list);
1274 return 0;
1275 case FLOW_BLOCK_UNBIND:
1276 block_cb = flow_block_cb_lookup(f->block, cb, dev);
1277 if (!block_cb)
1278 return -ENOENT;
1279
1280 flow_block_cb_remove(block_cb, f);
1281 list_del(&block_cb->driver_list);
1282 return 0;
1283 default:
1284 return -EOPNOTSUPP;
1285 }
1286}
1287
1288static int dsa_slave_setup_ft_block(struct dsa_switch *ds, int port,
1289 void *type_data)
1290{
1291 struct dsa_port *cpu_dp = dsa_to_port(ds, port)->cpu_dp;
1292 struct net_device *master = cpu_dp->master;
1293
1294 if (!master->netdev_ops->ndo_setup_tc)
1295 return -EOPNOTSUPP;
1296
1297 return master->netdev_ops->ndo_setup_tc(master, TC_SETUP_FT, type_data);
1298}
1299
1300static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
1301 void *type_data)
1302{
1303 struct dsa_port *dp = dsa_slave_to_port(dev);
1304 struct dsa_switch *ds = dp->ds;
1305
1306 switch (type) {
1307 case TC_SETUP_BLOCK:
1308 return dsa_slave_setup_tc_block(dev, type_data);
1309 case TC_SETUP_FT:
1310 return dsa_slave_setup_ft_block(ds, dp->index, type_data);
1311 default:
1312 break;
1313 }
1314
1315 if (!ds->ops->port_setup_tc)
1316 return -EOPNOTSUPP;
1317
1318 return ds->ops->port_setup_tc(ds, dp->index, type, type_data);
1319}
1320
1321static int dsa_slave_get_rxnfc(struct net_device *dev,
1322 struct ethtool_rxnfc *nfc, u32 *rule_locs)
1323{
1324 struct dsa_port *dp = dsa_slave_to_port(dev);
1325 struct dsa_switch *ds = dp->ds;
1326
1327 if (!ds->ops->get_rxnfc)
1328 return -EOPNOTSUPP;
1329
1330 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
1331}
1332
1333static int dsa_slave_set_rxnfc(struct net_device *dev,
1334 struct ethtool_rxnfc *nfc)
1335{
1336 struct dsa_port *dp = dsa_slave_to_port(dev);
1337 struct dsa_switch *ds = dp->ds;
1338
1339 if (!ds->ops->set_rxnfc)
1340 return -EOPNOTSUPP;
1341
1342 return ds->ops->set_rxnfc(ds, dp->index, nfc);
1343}
1344
1345static int dsa_slave_get_ts_info(struct net_device *dev,
1346 struct ethtool_ts_info *ts)
1347{
1348 struct dsa_slave_priv *p = netdev_priv(dev);
1349 struct dsa_switch *ds = p->dp->ds;
1350
1351 if (!ds->ops->get_ts_info)
1352 return -EOPNOTSUPP;
1353
1354 return ds->ops->get_ts_info(ds, p->dp->index, ts);
1355}
1356
1357static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
1358 u16 vid)
1359{
1360 struct net_device *master = dsa_slave_to_master(dev);
1361 struct dsa_port *dp = dsa_slave_to_port(dev);
1362 struct switchdev_obj_port_vlan vlan = {
1363 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
1364 .vid = vid,
1365
1366 .flags = 0,
1367 };
1368 struct netlink_ext_ack extack = {0};
1369 int ret;
1370
1371
1372 ret = dsa_port_vlan_add(dp, &vlan, &extack);
1373 if (ret) {
1374 if (extack._msg)
1375 netdev_err(dev, "%s\n", extack._msg);
1376 return ret;
1377 }
1378
1379
1380 ret = dsa_port_vlan_add(dp->cpu_dp, &vlan, &extack);
1381 if (ret) {
1382 if (extack._msg)
1383 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index,
1384 extack._msg);
1385 return ret;
1386 }
1387
1388 return vlan_vid_add(master, proto, vid);
1389}
1390
1391static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
1392 u16 vid)
1393{
1394 struct net_device *master = dsa_slave_to_master(dev);
1395 struct dsa_port *dp = dsa_slave_to_port(dev);
1396 struct switchdev_obj_port_vlan vlan = {
1397 .vid = vid,
1398
1399 .flags = 0,
1400 };
1401 int err;
1402
1403
1404
1405
1406 err = dsa_port_vlan_del(dp, &vlan);
1407 if (err)
1408 return err;
1409
1410 vlan_vid_del(master, proto, vid);
1411
1412 return 0;
1413}
1414
1415struct dsa_hw_port {
1416 struct list_head list;
1417 struct net_device *dev;
1418 int old_mtu;
1419};
1420
1421static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu)
1422{
1423 const struct dsa_hw_port *p;
1424 int err;
1425
1426 list_for_each_entry(p, hw_port_list, list) {
1427 if (p->dev->mtu == mtu)
1428 continue;
1429
1430 err = dev_set_mtu(p->dev, mtu);
1431 if (err)
1432 goto rollback;
1433 }
1434
1435 return 0;
1436
1437rollback:
1438 list_for_each_entry_continue_reverse(p, hw_port_list, list) {
1439 if (p->dev->mtu == p->old_mtu)
1440 continue;
1441
1442 if (dev_set_mtu(p->dev, p->old_mtu))
1443 netdev_err(p->dev, "Failed to restore MTU\n");
1444 }
1445
1446 return err;
1447}
1448
1449static void dsa_hw_port_list_free(struct list_head *hw_port_list)
1450{
1451 struct dsa_hw_port *p, *n;
1452
1453 list_for_each_entry_safe(p, n, hw_port_list, list)
1454 kfree(p);
1455}
1456
1457
1458static void dsa_bridge_mtu_normalization(struct dsa_port *dp)
1459{
1460 struct list_head hw_port_list;
1461 struct dsa_switch_tree *dst;
1462 int min_mtu = ETH_MAX_MTU;
1463 struct dsa_port *other_dp;
1464 int err;
1465
1466 if (!dp->ds->mtu_enforcement_ingress)
1467 return;
1468
1469 if (!dp->bridge_dev)
1470 return;
1471
1472 INIT_LIST_HEAD(&hw_port_list);
1473
1474
1475
1476
1477 list_for_each_entry(dst, &dsa_tree_list, list) {
1478 list_for_each_entry(other_dp, &dst->ports, list) {
1479 struct dsa_hw_port *hw_port;
1480 struct net_device *slave;
1481
1482 if (other_dp->type != DSA_PORT_TYPE_USER)
1483 continue;
1484
1485 if (other_dp->bridge_dev != dp->bridge_dev)
1486 continue;
1487
1488 if (!other_dp->ds->mtu_enforcement_ingress)
1489 continue;
1490
1491 slave = other_dp->slave;
1492
1493 if (min_mtu > slave->mtu)
1494 min_mtu = slave->mtu;
1495
1496 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL);
1497 if (!hw_port)
1498 goto out;
1499
1500 hw_port->dev = slave;
1501 hw_port->old_mtu = slave->mtu;
1502
1503 list_add(&hw_port->list, &hw_port_list);
1504 }
1505 }
1506
1507
1508
1509
1510
1511 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu);
1512 if (!err)
1513 goto out;
1514
1515
1516
1517
1518
1519 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu);
1520
1521out:
1522 dsa_hw_port_list_free(&hw_port_list);
1523}
1524
1525int dsa_slave_change_mtu(struct net_device *dev, int new_mtu)
1526{
1527 struct net_device *master = dsa_slave_to_master(dev);
1528 struct dsa_port *dp = dsa_slave_to_port(dev);
1529 struct dsa_slave_priv *p = netdev_priv(dev);
1530 struct dsa_switch *ds = p->dp->ds;
1531 struct dsa_port *cpu_dp;
1532 int port = p->dp->index;
1533 int largest_mtu = 0;
1534 int new_master_mtu;
1535 int old_master_mtu;
1536 int mtu_limit;
1537 int cpu_mtu;
1538 int err, i;
1539
1540 if (!ds->ops->port_change_mtu)
1541 return -EOPNOTSUPP;
1542
1543 for (i = 0; i < ds->num_ports; i++) {
1544 int slave_mtu;
1545
1546 if (!dsa_is_user_port(ds, i))
1547 continue;
1548
1549
1550
1551
1552
1553 if (!dsa_to_port(ds, i)->slave)
1554 continue;
1555
1556
1557
1558
1559 if (i == port)
1560 slave_mtu = new_mtu;
1561 else
1562 slave_mtu = dsa_to_port(ds, i)->slave->mtu;
1563
1564 if (largest_mtu < slave_mtu)
1565 largest_mtu = slave_mtu;
1566 }
1567
1568 cpu_dp = dsa_to_port(ds, port)->cpu_dp;
1569
1570 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu);
1571 old_master_mtu = master->mtu;
1572 new_master_mtu = largest_mtu + cpu_dp->tag_ops->overhead;
1573 if (new_master_mtu > mtu_limit)
1574 return -ERANGE;
1575
1576
1577
1578
1579 cpu_mtu = largest_mtu;
1580
1581
1582 if (new_master_mtu != old_master_mtu) {
1583 err = dev_set_mtu(master, new_master_mtu);
1584 if (err < 0)
1585 goto out_master_failed;
1586
1587
1588
1589
1590 err = dsa_port_mtu_change(cpu_dp, cpu_mtu, true);
1591 if (err)
1592 goto out_cpu_failed;
1593 }
1594
1595 err = dsa_port_mtu_change(dp, new_mtu, false);
1596 if (err)
1597 goto out_port_failed;
1598
1599 dev->mtu = new_mtu;
1600
1601 dsa_bridge_mtu_normalization(dp);
1602
1603 return 0;
1604
1605out_port_failed:
1606 if (new_master_mtu != old_master_mtu)
1607 dsa_port_mtu_change(cpu_dp, old_master_mtu -
1608 cpu_dp->tag_ops->overhead,
1609 true);
1610out_cpu_failed:
1611 if (new_master_mtu != old_master_mtu)
1612 dev_set_mtu(master, old_master_mtu);
1613out_master_failed:
1614 return err;
1615}
1616
1617static const struct ethtool_ops dsa_slave_ethtool_ops = {
1618 .get_drvinfo = dsa_slave_get_drvinfo,
1619 .get_regs_len = dsa_slave_get_regs_len,
1620 .get_regs = dsa_slave_get_regs,
1621 .nway_reset = dsa_slave_nway_reset,
1622 .get_link = ethtool_op_get_link,
1623 .get_eeprom_len = dsa_slave_get_eeprom_len,
1624 .get_eeprom = dsa_slave_get_eeprom,
1625 .set_eeprom = dsa_slave_set_eeprom,
1626 .get_strings = dsa_slave_get_strings,
1627 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
1628 .get_sset_count = dsa_slave_get_sset_count,
1629 .set_wol = dsa_slave_set_wol,
1630 .get_wol = dsa_slave_get_wol,
1631 .set_eee = dsa_slave_set_eee,
1632 .get_eee = dsa_slave_get_eee,
1633 .get_link_ksettings = dsa_slave_get_link_ksettings,
1634 .set_link_ksettings = dsa_slave_set_link_ksettings,
1635 .get_pauseparam = dsa_slave_get_pauseparam,
1636 .set_pauseparam = dsa_slave_set_pauseparam,
1637 .get_rxnfc = dsa_slave_get_rxnfc,
1638 .set_rxnfc = dsa_slave_set_rxnfc,
1639 .get_ts_info = dsa_slave_get_ts_info,
1640 .self_test = dsa_slave_net_selftest,
1641};
1642
1643
1644static int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
1645 struct net_device *dev,
1646 const unsigned char *addr, u16 vid,
1647 u16 flags,
1648 struct netlink_ext_ack *extack)
1649{
1650 struct dsa_port *dp = dsa_slave_to_port(dev);
1651
1652 return dsa_port_fdb_add(dp, addr, vid);
1653}
1654
1655static int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
1656 struct net_device *dev,
1657 const unsigned char *addr, u16 vid)
1658{
1659 struct dsa_port *dp = dsa_slave_to_port(dev);
1660
1661 return dsa_port_fdb_del(dp, addr, vid);
1662}
1663
1664static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
1665{
1666 struct dsa_port *dp = dsa_slave_to_port(dev);
1667
1668 return dp->ds->devlink ? &dp->devlink_port : NULL;
1669}
1670
1671static void dsa_slave_get_stats64(struct net_device *dev,
1672 struct rtnl_link_stats64 *s)
1673{
1674 struct dsa_port *dp = dsa_slave_to_port(dev);
1675 struct dsa_switch *ds = dp->ds;
1676
1677 if (ds->ops->get_stats64)
1678 ds->ops->get_stats64(ds, dp->index, s);
1679 else
1680 dev_get_tstats64(dev, s);
1681}
1682
1683static int dsa_slave_fill_forward_path(struct net_device_path_ctx *ctx,
1684 struct net_device_path *path)
1685{
1686 struct dsa_port *dp = dsa_slave_to_port(ctx->dev);
1687 struct dsa_port *cpu_dp = dp->cpu_dp;
1688
1689 path->dev = ctx->dev;
1690 path->type = DEV_PATH_DSA;
1691 path->dsa.proto = cpu_dp->tag_ops->proto;
1692 path->dsa.port = dp->index;
1693 ctx->dev = cpu_dp->master;
1694
1695 return 0;
1696}
1697
1698static const struct net_device_ops dsa_slave_netdev_ops = {
1699 .ndo_open = dsa_slave_open,
1700 .ndo_stop = dsa_slave_close,
1701 .ndo_start_xmit = dsa_slave_xmit,
1702 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
1703 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
1704 .ndo_set_mac_address = dsa_slave_set_mac_address,
1705 .ndo_fdb_add = dsa_legacy_fdb_add,
1706 .ndo_fdb_del = dsa_legacy_fdb_del,
1707 .ndo_fdb_dump = dsa_slave_fdb_dump,
1708 .ndo_do_ioctl = dsa_slave_ioctl,
1709 .ndo_get_iflink = dsa_slave_get_iflink,
1710#ifdef CONFIG_NET_POLL_CONTROLLER
1711 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
1712 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
1713 .ndo_poll_controller = dsa_slave_poll_controller,
1714#endif
1715 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
1716 .ndo_setup_tc = dsa_slave_setup_tc,
1717 .ndo_get_stats64 = dsa_slave_get_stats64,
1718 .ndo_get_port_parent_id = dsa_slave_get_port_parent_id,
1719 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
1720 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
1721 .ndo_get_devlink_port = dsa_slave_get_devlink_port,
1722 .ndo_change_mtu = dsa_slave_change_mtu,
1723 .ndo_fill_forward_path = dsa_slave_fill_forward_path,
1724};
1725
1726static struct device_type dsa_type = {
1727 .name = "dsa",
1728};
1729
1730void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
1731{
1732 const struct dsa_port *dp = dsa_to_port(ds, port);
1733
1734 if (dp->pl)
1735 phylink_mac_change(dp->pl, up);
1736}
1737EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
1738
1739static void dsa_slave_phylink_fixed_state(struct phylink_config *config,
1740 struct phylink_link_state *state)
1741{
1742 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1743 struct dsa_switch *ds = dp->ds;
1744
1745
1746
1747
1748 ds->ops->phylink_fixed_state(ds, dp->index, state);
1749}
1750
1751
1752static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
1753{
1754 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1755 struct dsa_switch *ds = dp->ds;
1756
1757 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
1758 if (!slave_dev->phydev) {
1759 netdev_err(slave_dev, "no phy at %d\n", addr);
1760 return -ENODEV;
1761 }
1762
1763 return phylink_connect_phy(dp->pl, slave_dev->phydev);
1764}
1765
1766static int dsa_slave_phy_setup(struct net_device *slave_dev)
1767{
1768 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1769 struct device_node *port_dn = dp->dn;
1770 struct dsa_switch *ds = dp->ds;
1771 phy_interface_t mode;
1772 u32 phy_flags = 0;
1773 int ret;
1774
1775 ret = of_get_phy_mode(port_dn, &mode);
1776 if (ret)
1777 mode = PHY_INTERFACE_MODE_NA;
1778
1779 dp->pl_config.dev = &slave_dev->dev;
1780 dp->pl_config.type = PHYLINK_NETDEV;
1781
1782
1783
1784
1785
1786 if (ds->ops->phylink_fixed_state) {
1787 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state;
1788 dp->pl_config.poll_fixed_state = true;
1789 }
1790
1791 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode,
1792 &dsa_port_phylink_mac_ops);
1793 if (IS_ERR(dp->pl)) {
1794 netdev_err(slave_dev,
1795 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1796 return PTR_ERR(dp->pl);
1797 }
1798
1799 if (ds->ops->get_phy_flags)
1800 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
1801
1802 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
1803 if (ret == -ENODEV && ds->slave_mii_bus) {
1804
1805
1806
1807 ret = dsa_slave_phy_connect(slave_dev, dp->index);
1808 if (ret) {
1809 netdev_err(slave_dev,
1810 "failed to connect to port %d: %d\n",
1811 dp->index, ret);
1812 phylink_destroy(dp->pl);
1813 return ret;
1814 }
1815 }
1816
1817 return ret;
1818}
1819
1820void dsa_slave_setup_tagger(struct net_device *slave)
1821{
1822 struct dsa_port *dp = dsa_slave_to_port(slave);
1823 struct dsa_slave_priv *p = netdev_priv(slave);
1824 const struct dsa_port *cpu_dp = dp->cpu_dp;
1825 struct net_device *master = cpu_dp->master;
1826
1827 if (cpu_dp->tag_ops->tail_tag)
1828 slave->needed_tailroom = cpu_dp->tag_ops->overhead;
1829 else
1830 slave->needed_headroom = cpu_dp->tag_ops->overhead;
1831
1832
1833
1834
1835 slave->needed_headroom += master->needed_headroom;
1836 slave->needed_tailroom += master->needed_tailroom;
1837
1838 p->xmit = cpu_dp->tag_ops->xmit;
1839}
1840
1841static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1842static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1843 struct netdev_queue *txq,
1844 void *_unused)
1845{
1846 lockdep_set_class(&txq->_xmit_lock,
1847 &dsa_slave_netdev_xmit_lock_key);
1848}
1849
1850int dsa_slave_suspend(struct net_device *slave_dev)
1851{
1852 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1853
1854 if (!netif_running(slave_dev))
1855 return 0;
1856
1857 netif_device_detach(slave_dev);
1858
1859 rtnl_lock();
1860 phylink_stop(dp->pl);
1861 rtnl_unlock();
1862
1863 return 0;
1864}
1865
1866int dsa_slave_resume(struct net_device *slave_dev)
1867{
1868 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1869
1870 if (!netif_running(slave_dev))
1871 return 0;
1872
1873 netif_device_attach(slave_dev);
1874
1875 rtnl_lock();
1876 phylink_start(dp->pl);
1877 rtnl_unlock();
1878
1879 return 0;
1880}
1881
1882int dsa_slave_create(struct dsa_port *port)
1883{
1884 const struct dsa_port *cpu_dp = port->cpu_dp;
1885 struct net_device *master = cpu_dp->master;
1886 struct dsa_switch *ds = port->ds;
1887 const char *name = port->name;
1888 struct net_device *slave_dev;
1889 struct dsa_slave_priv *p;
1890 int ret;
1891
1892 if (!ds->num_tx_queues)
1893 ds->num_tx_queues = 1;
1894
1895 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
1896 NET_NAME_UNKNOWN, ether_setup,
1897 ds->num_tx_queues, 1);
1898 if (slave_dev == NULL)
1899 return -ENOMEM;
1900
1901 slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
1902 if (ds->ops->port_vlan_add && ds->ops->port_vlan_del)
1903 slave_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1904 slave_dev->hw_features |= NETIF_F_HW_TC;
1905 slave_dev->features |= NETIF_F_LLTX;
1906 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1907 if (!is_zero_ether_addr(port->mac))
1908 ether_addr_copy(slave_dev->dev_addr, port->mac);
1909 else
1910 eth_hw_addr_inherit(slave_dev, master);
1911 slave_dev->priv_flags |= IFF_NO_QUEUE;
1912 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1913 if (ds->ops->port_max_mtu)
1914 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index);
1915 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1916
1917 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1918 NULL);
1919
1920 SET_NETDEV_DEV(slave_dev, port->ds->dev);
1921 slave_dev->dev.of_node = port->dn;
1922 slave_dev->vlan_features = master->vlan_features;
1923
1924 p = netdev_priv(slave_dev);
1925 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1926 if (!slave_dev->tstats) {
1927 free_netdev(slave_dev);
1928 return -ENOMEM;
1929 }
1930
1931 ret = gro_cells_init(&p->gcells, slave_dev);
1932 if (ret)
1933 goto out_free;
1934
1935 p->dp = port;
1936 INIT_LIST_HEAD(&p->mall_tc_list);
1937 port->slave = slave_dev;
1938 dsa_slave_setup_tagger(slave_dev);
1939
1940 rtnl_lock();
1941 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN);
1942 rtnl_unlock();
1943 if (ret && ret != -EOPNOTSUPP)
1944 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n",
1945 ret, ETH_DATA_LEN, port->index);
1946
1947 netif_carrier_off(slave_dev);
1948
1949 ret = dsa_slave_phy_setup(slave_dev);
1950 if (ret) {
1951 netdev_err(slave_dev,
1952 "error %d setting up PHY for tree %d, switch %d, port %d\n",
1953 ret, ds->dst->index, ds->index, port->index);
1954 goto out_gcells;
1955 }
1956
1957 rtnl_lock();
1958
1959 ret = register_netdevice(slave_dev);
1960 if (ret) {
1961 netdev_err(master, "error %d registering interface %s\n",
1962 ret, slave_dev->name);
1963 rtnl_unlock();
1964 goto out_phy;
1965 }
1966
1967 ret = netdev_upper_dev_link(master, slave_dev, NULL);
1968
1969 rtnl_unlock();
1970
1971 if (ret)
1972 goto out_unregister;
1973
1974 return 0;
1975
1976out_unregister:
1977 unregister_netdev(slave_dev);
1978out_phy:
1979 rtnl_lock();
1980 phylink_disconnect_phy(p->dp->pl);
1981 rtnl_unlock();
1982 phylink_destroy(p->dp->pl);
1983out_gcells:
1984 gro_cells_destroy(&p->gcells);
1985out_free:
1986 free_percpu(slave_dev->tstats);
1987 free_netdev(slave_dev);
1988 port->slave = NULL;
1989 return ret;
1990}
1991
1992void dsa_slave_destroy(struct net_device *slave_dev)
1993{
1994 struct net_device *master = dsa_slave_to_master(slave_dev);
1995 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1996 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1997
1998 netif_carrier_off(slave_dev);
1999 rtnl_lock();
2000 netdev_upper_dev_unlink(master, slave_dev);
2001 unregister_netdevice(slave_dev);
2002 phylink_disconnect_phy(dp->pl);
2003 rtnl_unlock();
2004
2005 phylink_destroy(dp->pl);
2006 gro_cells_destroy(&p->gcells);
2007 free_percpu(slave_dev->tstats);
2008 free_netdev(slave_dev);
2009}
2010
2011bool dsa_slave_dev_check(const struct net_device *dev)
2012{
2013 return dev->netdev_ops == &dsa_slave_netdev_ops;
2014}
2015EXPORT_SYMBOL_GPL(dsa_slave_dev_check);
2016
2017static int dsa_slave_changeupper(struct net_device *dev,
2018 struct netdev_notifier_changeupper_info *info)
2019{
2020 struct dsa_port *dp = dsa_slave_to_port(dev);
2021 struct netlink_ext_ack *extack;
2022 int err = NOTIFY_DONE;
2023
2024 extack = netdev_notifier_info_to_extack(&info->info);
2025
2026 if (netif_is_bridge_master(info->upper_dev)) {
2027 if (info->linking) {
2028 err = dsa_port_bridge_join(dp, info->upper_dev, extack);
2029 if (!err)
2030 dsa_bridge_mtu_normalization(dp);
2031 err = notifier_from_errno(err);
2032 } else {
2033 dsa_port_bridge_leave(dp, info->upper_dev);
2034 err = NOTIFY_OK;
2035 }
2036 } else if (netif_is_lag_master(info->upper_dev)) {
2037 if (info->linking) {
2038 err = dsa_port_lag_join(dp, info->upper_dev,
2039 info->upper_info, extack);
2040 if (err == -EOPNOTSUPP) {
2041 NL_SET_ERR_MSG_MOD(info->info.extack,
2042 "Offloading not supported");
2043 err = 0;
2044 }
2045 err = notifier_from_errno(err);
2046 } else {
2047 dsa_port_lag_leave(dp, info->upper_dev);
2048 err = NOTIFY_OK;
2049 }
2050 } else if (is_hsr_master(info->upper_dev)) {
2051 if (info->linking) {
2052 err = dsa_port_hsr_join(dp, info->upper_dev);
2053 if (err == -EOPNOTSUPP) {
2054 NL_SET_ERR_MSG_MOD(info->info.extack,
2055 "Offloading not supported");
2056 err = 0;
2057 }
2058 err = notifier_from_errno(err);
2059 } else {
2060 dsa_port_hsr_leave(dp, info->upper_dev);
2061 err = NOTIFY_OK;
2062 }
2063 }
2064
2065 return err;
2066}
2067
2068static int
2069dsa_slave_lag_changeupper(struct net_device *dev,
2070 struct netdev_notifier_changeupper_info *info)
2071{
2072 struct net_device *lower;
2073 struct list_head *iter;
2074 int err = NOTIFY_DONE;
2075 struct dsa_port *dp;
2076
2077 netdev_for_each_lower_dev(dev, lower, iter) {
2078 if (!dsa_slave_dev_check(lower))
2079 continue;
2080
2081 dp = dsa_slave_to_port(lower);
2082 if (!dp->lag_dev)
2083
2084 continue;
2085
2086 err = dsa_slave_changeupper(lower, info);
2087 if (notifier_to_errno(err))
2088 break;
2089 }
2090
2091 return err;
2092}
2093
2094static int
2095dsa_prevent_bridging_8021q_upper(struct net_device *dev,
2096 struct netdev_notifier_changeupper_info *info)
2097{
2098 struct netlink_ext_ack *ext_ack;
2099 struct net_device *slave;
2100 struct dsa_port *dp;
2101
2102 ext_ack = netdev_notifier_info_to_extack(&info->info);
2103
2104 if (!is_vlan_dev(dev))
2105 return NOTIFY_DONE;
2106
2107 slave = vlan_dev_real_dev(dev);
2108 if (!dsa_slave_dev_check(slave))
2109 return NOTIFY_DONE;
2110
2111 dp = dsa_slave_to_port(slave);
2112 if (!dp->bridge_dev)
2113 return NOTIFY_DONE;
2114
2115
2116 if (br_vlan_enabled(dp->bridge_dev) &&
2117 netif_is_bridge_master(info->upper_dev) && info->linking) {
2118 NL_SET_ERR_MSG_MOD(ext_ack,
2119 "Cannot enslave VLAN device into VLAN aware bridge");
2120 return notifier_from_errno(-EINVAL);
2121 }
2122
2123 return NOTIFY_DONE;
2124}
2125
2126static int
2127dsa_slave_check_8021q_upper(struct net_device *dev,
2128 struct netdev_notifier_changeupper_info *info)
2129{
2130 struct dsa_port *dp = dsa_slave_to_port(dev);
2131 struct net_device *br = dp->bridge_dev;
2132 struct bridge_vlan_info br_info;
2133 struct netlink_ext_ack *extack;
2134 int err = NOTIFY_DONE;
2135 u16 vid;
2136
2137 if (!br || !br_vlan_enabled(br))
2138 return NOTIFY_DONE;
2139
2140 extack = netdev_notifier_info_to_extack(&info->info);
2141 vid = vlan_dev_vlan_id(info->upper_dev);
2142
2143
2144
2145
2146
2147 err = br_vlan_get_info(br, vid, &br_info);
2148 if (err == 0) {
2149 NL_SET_ERR_MSG_MOD(extack,
2150 "This VLAN is already configured by the bridge");
2151 return notifier_from_errno(-EBUSY);
2152 }
2153
2154 return NOTIFY_DONE;
2155}
2156
2157static int dsa_slave_netdevice_event(struct notifier_block *nb,
2158 unsigned long event, void *ptr)
2159{
2160 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2161
2162 switch (event) {
2163 case NETDEV_PRECHANGEUPPER: {
2164 struct netdev_notifier_changeupper_info *info = ptr;
2165 struct dsa_switch *ds;
2166 struct dsa_port *dp;
2167 int err;
2168
2169 if (!dsa_slave_dev_check(dev))
2170 return dsa_prevent_bridging_8021q_upper(dev, ptr);
2171
2172 dp = dsa_slave_to_port(dev);
2173 ds = dp->ds;
2174
2175 if (ds->ops->port_prechangeupper) {
2176 err = ds->ops->port_prechangeupper(ds, dp->index, info);
2177 if (err)
2178 return notifier_from_errno(err);
2179 }
2180
2181 if (is_vlan_dev(info->upper_dev))
2182 return dsa_slave_check_8021q_upper(dev, ptr);
2183 break;
2184 }
2185 case NETDEV_CHANGEUPPER:
2186 if (dsa_slave_dev_check(dev))
2187 return dsa_slave_changeupper(dev, ptr);
2188
2189 if (netif_is_lag_master(dev))
2190 return dsa_slave_lag_changeupper(dev, ptr);
2191
2192 break;
2193 case NETDEV_CHANGELOWERSTATE: {
2194 struct netdev_notifier_changelowerstate_info *info = ptr;
2195 struct dsa_port *dp;
2196 int err;
2197
2198 if (!dsa_slave_dev_check(dev))
2199 break;
2200
2201 dp = dsa_slave_to_port(dev);
2202
2203 err = dsa_port_lag_change(dp, info->lower_state_info);
2204 return notifier_from_errno(err);
2205 }
2206 case NETDEV_GOING_DOWN: {
2207 struct dsa_port *dp, *cpu_dp;
2208 struct dsa_switch_tree *dst;
2209 LIST_HEAD(close_list);
2210
2211 if (!netdev_uses_dsa(dev))
2212 return NOTIFY_DONE;
2213
2214 cpu_dp = dev->dsa_ptr;
2215 dst = cpu_dp->ds->dst;
2216
2217 list_for_each_entry(dp, &dst->ports, list) {
2218 if (!dsa_is_user_port(dp->ds, dp->index))
2219 continue;
2220
2221 list_add(&dp->slave->close_list, &close_list);
2222 }
2223
2224 dev_close_many(&close_list, true);
2225
2226 return NOTIFY_OK;
2227 }
2228 default:
2229 break;
2230 }
2231
2232 return NOTIFY_DONE;
2233}
2234
2235static void
2236dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work)
2237{
2238 struct dsa_switch *ds = switchdev_work->ds;
2239 struct switchdev_notifier_fdb_info info;
2240 struct dsa_port *dp;
2241
2242 if (!dsa_is_user_port(ds, switchdev_work->port))
2243 return;
2244
2245 info.addr = switchdev_work->addr;
2246 info.vid = switchdev_work->vid;
2247 info.offloaded = true;
2248 dp = dsa_to_port(ds, switchdev_work->port);
2249 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
2250 dp->slave, &info.info, NULL);
2251}
2252
2253static void dsa_slave_switchdev_event_work(struct work_struct *work)
2254{
2255 struct dsa_switchdev_event_work *switchdev_work =
2256 container_of(work, struct dsa_switchdev_event_work, work);
2257 struct dsa_switch *ds = switchdev_work->ds;
2258 struct dsa_port *dp;
2259 int err;
2260
2261 dp = dsa_to_port(ds, switchdev_work->port);
2262
2263 rtnl_lock();
2264 switch (switchdev_work->event) {
2265 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2266 err = dsa_port_fdb_add(dp, switchdev_work->addr,
2267 switchdev_work->vid);
2268 if (err) {
2269 dev_err(ds->dev,
2270 "port %d failed to add %pM vid %d to fdb: %d\n",
2271 dp->index, switchdev_work->addr,
2272 switchdev_work->vid, err);
2273 break;
2274 }
2275 dsa_fdb_offload_notify(switchdev_work);
2276 break;
2277
2278 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2279 err = dsa_port_fdb_del(dp, switchdev_work->addr,
2280 switchdev_work->vid);
2281 if (err) {
2282 dev_err(ds->dev,
2283 "port %d failed to delete %pM vid %d from fdb: %d\n",
2284 dp->index, switchdev_work->addr,
2285 switchdev_work->vid, err);
2286 }
2287
2288 break;
2289 }
2290 rtnl_unlock();
2291
2292 kfree(switchdev_work);
2293 if (dsa_is_user_port(ds, dp->index))
2294 dev_put(dp->slave);
2295}
2296
2297static int dsa_lower_dev_walk(struct net_device *lower_dev,
2298 struct netdev_nested_priv *priv)
2299{
2300 if (dsa_slave_dev_check(lower_dev)) {
2301 priv->data = (void *)netdev_priv(lower_dev);
2302 return 1;
2303 }
2304
2305 return 0;
2306}
2307
2308static struct dsa_slave_priv *dsa_slave_dev_lower_find(struct net_device *dev)
2309{
2310 struct netdev_nested_priv priv = {
2311 .data = NULL,
2312 };
2313
2314 netdev_walk_all_lower_dev_rcu(dev, dsa_lower_dev_walk, &priv);
2315
2316 return (struct dsa_slave_priv *)priv.data;
2317}
2318
2319
2320static int dsa_slave_switchdev_event(struct notifier_block *unused,
2321 unsigned long event, void *ptr)
2322{
2323 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2324 const struct switchdev_notifier_fdb_info *fdb_info;
2325 struct dsa_switchdev_event_work *switchdev_work;
2326 struct dsa_port *dp;
2327 int err;
2328
2329 switch (event) {
2330 case SWITCHDEV_PORT_ATTR_SET:
2331 err = switchdev_handle_port_attr_set(dev, ptr,
2332 dsa_slave_dev_check,
2333 dsa_slave_port_attr_set);
2334 return notifier_from_errno(err);
2335 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2336 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2337 fdb_info = ptr;
2338
2339 if (dsa_slave_dev_check(dev)) {
2340 if (!fdb_info->added_by_user || fdb_info->is_local)
2341 return NOTIFY_OK;
2342
2343 dp = dsa_slave_to_port(dev);
2344 } else {
2345
2346
2347
2348
2349 struct net_device *br_dev;
2350 struct dsa_slave_priv *p;
2351
2352 br_dev = netdev_master_upper_dev_get_rcu(dev);
2353 if (!br_dev)
2354 return NOTIFY_DONE;
2355
2356 if (!netif_is_bridge_master(br_dev))
2357 return NOTIFY_DONE;
2358
2359 p = dsa_slave_dev_lower_find(br_dev);
2360 if (!p)
2361 return NOTIFY_DONE;
2362
2363 dp = p->dp->cpu_dp;
2364
2365 if (!dp->ds->assisted_learning_on_cpu_port)
2366 return NOTIFY_DONE;
2367
2368
2369
2370
2371
2372
2373 if (dsa_tree_offloads_bridge_port(dp->ds->dst, dev))
2374 return NOTIFY_DONE;
2375 }
2376
2377 if (!dp->ds->ops->port_fdb_add || !dp->ds->ops->port_fdb_del)
2378 return NOTIFY_DONE;
2379
2380 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2381 if (!switchdev_work)
2382 return NOTIFY_BAD;
2383
2384 INIT_WORK(&switchdev_work->work,
2385 dsa_slave_switchdev_event_work);
2386 switchdev_work->ds = dp->ds;
2387 switchdev_work->port = dp->index;
2388 switchdev_work->event = event;
2389
2390 ether_addr_copy(switchdev_work->addr,
2391 fdb_info->addr);
2392 switchdev_work->vid = fdb_info->vid;
2393
2394
2395 if (dsa_is_user_port(dp->ds, dp->index))
2396 dev_hold(dev);
2397 dsa_schedule_work(&switchdev_work->work);
2398 break;
2399 default:
2400 return NOTIFY_DONE;
2401 }
2402
2403 return NOTIFY_OK;
2404}
2405
2406static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
2407 unsigned long event, void *ptr)
2408{
2409 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2410 int err;
2411
2412 switch (event) {
2413 case SWITCHDEV_PORT_OBJ_ADD:
2414 err = switchdev_handle_port_obj_add(dev, ptr,
2415 dsa_slave_dev_check,
2416 dsa_slave_port_obj_add);
2417 return notifier_from_errno(err);
2418 case SWITCHDEV_PORT_OBJ_DEL:
2419 err = switchdev_handle_port_obj_del(dev, ptr,
2420 dsa_slave_dev_check,
2421 dsa_slave_port_obj_del);
2422 return notifier_from_errno(err);
2423 case SWITCHDEV_PORT_ATTR_SET:
2424 err = switchdev_handle_port_attr_set(dev, ptr,
2425 dsa_slave_dev_check,
2426 dsa_slave_port_attr_set);
2427 return notifier_from_errno(err);
2428 }
2429
2430 return NOTIFY_DONE;
2431}
2432
2433static struct notifier_block dsa_slave_nb __read_mostly = {
2434 .notifier_call = dsa_slave_netdevice_event,
2435};
2436
2437struct notifier_block dsa_slave_switchdev_notifier = {
2438 .notifier_call = dsa_slave_switchdev_event,
2439};
2440
2441struct notifier_block dsa_slave_switchdev_blocking_notifier = {
2442 .notifier_call = dsa_slave_switchdev_blocking_event,
2443};
2444
2445int dsa_slave_register_notifier(void)
2446{
2447 struct notifier_block *nb;
2448 int err;
2449
2450 err = register_netdevice_notifier(&dsa_slave_nb);
2451 if (err)
2452 return err;
2453
2454 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
2455 if (err)
2456 goto err_switchdev_nb;
2457
2458 nb = &dsa_slave_switchdev_blocking_notifier;
2459 err = register_switchdev_blocking_notifier(nb);
2460 if (err)
2461 goto err_switchdev_blocking_nb;
2462
2463 return 0;
2464
2465err_switchdev_blocking_nb:
2466 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2467err_switchdev_nb:
2468 unregister_netdevice_notifier(&dsa_slave_nb);
2469 return err;
2470}
2471
2472void dsa_slave_unregister_notifier(void)
2473{
2474 struct notifier_block *nb;
2475 int err;
2476
2477 nb = &dsa_slave_switchdev_blocking_notifier;
2478 err = unregister_switchdev_blocking_notifier(nb);
2479 if (err)
2480 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
2481
2482 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2483 if (err)
2484 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
2485
2486 err = unregister_netdevice_notifier(&dsa_slave_nb);
2487 if (err)
2488 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
2489}
2490
