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1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * net/dsa/slave.c - Slave device handling
4 * Copyright (c) 2008-2009 Marvell Semiconductor
5 */
6
7 #include <linux/list.h>
8 #include <linux/etherdevice.h>
9 #include <linux/netdevice.h>
10 #include <linux/phy.h>
11 #include <linux/phy_fixed.h>
12 #include <linux/phylink.h>
13 #include <linux/of_net.h>
14 #include <linux/of_mdio.h>
15 #include <linux/mdio.h>
16 #include <net/rtnetlink.h>
17 #include <net/pkt_cls.h>
18 #include <net/tc_act/tc_mirred.h>
19 #include <linux/if_bridge.h>
20 #include <linux/netpoll.h>
21 #include <linux/ptp_classify.h>
22
23 #include "dsa_priv.h"
24
25 /* slave mii_bus handling ***************************************************/
26 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
27 {
28 struct dsa_switch *ds = bus->priv;
29
30 if (ds->phys_mii_mask & (1 << addr))
31 return ds->ops->phy_read(ds, addr, reg);
32
33 return 0xffff;
34 }
35
36 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
37 {
38 struct dsa_switch *ds = bus->priv;
39
40 if (ds->phys_mii_mask & (1 << addr))
41 return ds->ops->phy_write(ds, addr, reg, val);
42
43 return 0;
44 }
45
46 void dsa_slave_mii_bus_init(struct dsa_switch *ds)
47 {
48 ds->slave_mii_bus->priv = (void *)ds;
49 ds->slave_mii_bus->name = "dsa slave smi";
50 ds->slave_mii_bus->read = dsa_slave_phy_read;
51 ds->slave_mii_bus->write = dsa_slave_phy_write;
52 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
53 ds->dst->index, ds->index);
54 ds->slave_mii_bus->parent = ds->dev;
55 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
56 }
57
58
59 /* slave device handling ****************************************************/
60 static int dsa_slave_get_iflink(const struct net_device *dev)
61 {
62 return dsa_slave_to_master(dev)->ifindex;
63 }
64
65 static int dsa_slave_open(struct net_device *dev)
66 {
67 struct net_device *master = dsa_slave_to_master(dev);
68 struct dsa_port *dp = dsa_slave_to_port(dev);
69 int err;
70
71 if (!(master->flags & IFF_UP))
72 return -ENETDOWN;
73
74 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
75 err = dev_uc_add(master, dev->dev_addr);
76 if (err < 0)
77 goto out;
78 }
79
80 if (dev->flags & IFF_ALLMULTI) {
81 err = dev_set_allmulti(master, 1);
82 if (err < 0)
83 goto del_unicast;
84 }
85 if (dev->flags & IFF_PROMISC) {
86 err = dev_set_promiscuity(master, 1);
87 if (err < 0)
88 goto clear_allmulti;
89 }
90
91 err = dsa_port_enable_rt(dp, dev->phydev);
92 if (err)
93 goto clear_promisc;
94
95 return 0;
96
97 clear_promisc:
98 if (dev->flags & IFF_PROMISC)
99 dev_set_promiscuity(master, -1);
100 clear_allmulti:
101 if (dev->flags & IFF_ALLMULTI)
102 dev_set_allmulti(master, -1);
103 del_unicast:
104 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
105 dev_uc_del(master, dev->dev_addr);
106 out:
107 return err;
108 }
109
110 static int dsa_slave_close(struct net_device *dev)
111 {
112 struct net_device *master = dsa_slave_to_master(dev);
113 struct dsa_port *dp = dsa_slave_to_port(dev);
114
115 dsa_port_disable_rt(dp);
116
117 dev_mc_unsync(master, dev);
118 dev_uc_unsync(master, dev);
119 if (dev->flags & IFF_ALLMULTI)
120 dev_set_allmulti(master, -1);
121 if (dev->flags & IFF_PROMISC)
122 dev_set_promiscuity(master, -1);
123
124 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
125 dev_uc_del(master, dev->dev_addr);
126
127 return 0;
128 }
129
130 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
131 {
132 struct net_device *master = dsa_slave_to_master(dev);
133 if (dev->flags & IFF_UP) {
134 if (change & IFF_ALLMULTI)
135 dev_set_allmulti(master,
136 dev->flags & IFF_ALLMULTI ? 1 : -1);
137 if (change & IFF_PROMISC)
138 dev_set_promiscuity(master,
139 dev->flags & IFF_PROMISC ? 1 : -1);
140 }
141 }
142
143 static void dsa_slave_set_rx_mode(struct net_device *dev)
144 {
145 struct net_device *master = dsa_slave_to_master(dev);
146
147 dev_mc_sync(master, dev);
148 dev_uc_sync(master, dev);
149 }
150
151 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
152 {
153 struct net_device *master = dsa_slave_to_master(dev);
154 struct sockaddr *addr = a;
155 int err;
156
157 if (!is_valid_ether_addr(addr->sa_data))
158 return -EADDRNOTAVAIL;
159
160 if (!(dev->flags & IFF_UP))
161 goto out;
162
163 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
164 err = dev_uc_add(master, addr->sa_data);
165 if (err < 0)
166 return err;
167 }
168
169 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
170 dev_uc_del(master, dev->dev_addr);
171
172 out:
173 ether_addr_copy(dev->dev_addr, addr->sa_data);
174
175 return 0;
176 }
177
178 struct dsa_slave_dump_ctx {
179 struct net_device *dev;
180 struct sk_buff *skb;
181 struct netlink_callback *cb;
182 int idx;
183 };
184
185 static int
186 dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid,
187 bool is_static, void *data)
188 {
189 struct dsa_slave_dump_ctx *dump = data;
190 u32 portid = NETLINK_CB(dump->cb->skb).portid;
191 u32 seq = dump->cb->nlh->nlmsg_seq;
192 struct nlmsghdr *nlh;
193 struct ndmsg *ndm;
194
195 if (dump->idx < dump->cb->args[2])
196 goto skip;
197
198 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
199 sizeof(*ndm), NLM_F_MULTI);
200 if (!nlh)
201 return -EMSGSIZE;
202
203 ndm = nlmsg_data(nlh);
204 ndm->ndm_family = AF_BRIDGE;
205 ndm->ndm_pad1 = 0;
206 ndm->ndm_pad2 = 0;
207 ndm->ndm_flags = NTF_SELF;
208 ndm->ndm_type = 0;
209 ndm->ndm_ifindex = dump->dev->ifindex;
210 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
211
212 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
213 goto nla_put_failure;
214
215 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
216 goto nla_put_failure;
217
218 nlmsg_end(dump->skb, nlh);
219
220 skip:
221 dump->idx++;
222 return 0;
223
224 nla_put_failure:
225 nlmsg_cancel(dump->skb, nlh);
226 return -EMSGSIZE;
227 }
228
229 static int
230 dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
231 struct net_device *dev, struct net_device *filter_dev,
232 int *idx)
233 {
234 struct dsa_port *dp = dsa_slave_to_port(dev);
235 struct dsa_slave_dump_ctx dump = {
236 .dev = dev,
237 .skb = skb,
238 .cb = cb,
239 .idx = *idx,
240 };
241 int err;
242
243 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump);
244 *idx = dump.idx;
245
246 return err;
247 }
248
249 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
250 {
251 struct dsa_slave_priv *p = netdev_priv(dev);
252 struct dsa_switch *ds = p->dp->ds;
253 int port = p->dp->index;
254
255 /* Pass through to switch driver if it supports timestamping */
256 switch (cmd) {
257 case SIOCGHWTSTAMP:
258 if (ds->ops->port_hwtstamp_get)
259 return ds->ops->port_hwtstamp_get(ds, port, ifr);
260 break;
261 case SIOCSHWTSTAMP:
262 if (ds->ops->port_hwtstamp_set)
263 return ds->ops->port_hwtstamp_set(ds, port, ifr);
264 break;
265 }
266
267 return phylink_mii_ioctl(p->dp->pl, ifr, cmd);
268 }
269
270 static int dsa_slave_port_attr_set(struct net_device *dev,
271 const struct switchdev_attr *attr,
272 struct switchdev_trans *trans)
273 {
274 struct dsa_port *dp = dsa_slave_to_port(dev);
275 int ret;
276
277 switch (attr->id) {
278 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
279 ret = dsa_port_set_state(dp, attr->u.stp_state, trans);
280 break;
281 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
282 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
283 trans);
284 break;
285 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
286 ret = dsa_port_ageing_time(dp, attr->u.ageing_time, trans);
287 break;
288 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
289 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags,
290 trans);
291 break;
292 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
293 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, trans);
294 break;
295 case SWITCHDEV_ATTR_ID_BRIDGE_MROUTER:
296 ret = dsa_port_mrouter(dp->cpu_dp, attr->u.mrouter, trans);
297 break;
298 default:
299 ret = -EOPNOTSUPP;
300 break;
301 }
302
303 return ret;
304 }
305
306 static int dsa_slave_vlan_add(struct net_device *dev,
307 const struct switchdev_obj *obj,
308 struct switchdev_trans *trans)
309 {
310 struct dsa_port *dp = dsa_slave_to_port(dev);
311 struct switchdev_obj_port_vlan vlan;
312 int err;
313
314 if (obj->orig_dev != dev)
315 return -EOPNOTSUPP;
316
317 if (dsa_port_skip_vlan_configuration(dp))
318 return 0;
319
320 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj);
321
322 err = dsa_port_vlan_add(dp, &vlan, trans);
323 if (err)
324 return err;
325
326 /* We need the dedicated CPU port to be a member of the VLAN as well.
327 * Even though drivers often handle CPU membership in special ways,
328 * it doesn't make sense to program a PVID, so clear this flag.
329 */
330 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID;
331
332 err = dsa_port_vlan_add(dp->cpu_dp, &vlan, trans);
333 if (err)
334 return err;
335
336 return 0;
337 }
338
339 static int dsa_slave_port_obj_add(struct net_device *dev,
340 const struct switchdev_obj *obj,
341 struct switchdev_trans *trans,
342 struct netlink_ext_ack *extack)
343 {
344 struct dsa_port *dp = dsa_slave_to_port(dev);
345 int err;
346
347 /* For the prepare phase, ensure the full set of changes is feasable in
348 * one go in order to signal a failure properly. If an operation is not
349 * supported, return -EOPNOTSUPP.
350 */
351
352 switch (obj->id) {
353 case SWITCHDEV_OBJ_ID_PORT_MDB:
354 if (obj->orig_dev != dev)
355 return -EOPNOTSUPP;
356 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans);
357 break;
358 case SWITCHDEV_OBJ_ID_HOST_MDB:
359 /* DSA can directly translate this to a normal MDB add,
360 * but on the CPU port.
361 */
362 err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj),
363 trans);
364 break;
365 case SWITCHDEV_OBJ_ID_PORT_VLAN:
366 err = dsa_slave_vlan_add(dev, obj, trans);
367 break;
368 default:
369 err = -EOPNOTSUPP;
370 break;
371 }
372
373 return err;
374 }
375
376 static int dsa_slave_vlan_del(struct net_device *dev,
377 const struct switchdev_obj *obj)
378 {
379 struct dsa_port *dp = dsa_slave_to_port(dev);
380
381 if (obj->orig_dev != dev)
382 return -EOPNOTSUPP;
383
384 if (dsa_port_skip_vlan_configuration(dp))
385 return 0;
386
387 /* Do not deprogram the CPU port as it may be shared with other user
388 * ports which can be members of this VLAN as well.
389 */
390 return dsa_port_vlan_del(dp, SWITCHDEV_OBJ_PORT_VLAN(obj));
391 }
392
393 static int dsa_slave_port_obj_del(struct net_device *dev,
394 const struct switchdev_obj *obj)
395 {
396 struct dsa_port *dp = dsa_slave_to_port(dev);
397 int err;
398
399 switch (obj->id) {
400 case SWITCHDEV_OBJ_ID_PORT_MDB:
401 if (obj->orig_dev != dev)
402 return -EOPNOTSUPP;
403 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
404 break;
405 case SWITCHDEV_OBJ_ID_HOST_MDB:
406 /* DSA can directly translate this to a normal MDB add,
407 * but on the CPU port.
408 */
409 err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj));
410 break;
411 case SWITCHDEV_OBJ_ID_PORT_VLAN:
412 err = dsa_slave_vlan_del(dev, obj);
413 break;
414 default:
415 err = -EOPNOTSUPP;
416 break;
417 }
418
419 return err;
420 }
421
422 static int dsa_slave_get_port_parent_id(struct net_device *dev,
423 struct netdev_phys_item_id *ppid)
424 {
425 struct dsa_port *dp = dsa_slave_to_port(dev);
426 struct dsa_switch *ds = dp->ds;
427 struct dsa_switch_tree *dst = ds->dst;
428
429 /* For non-legacy ports, devlink is used and it takes
430 * care of the name generation. This ndo implementation
431 * should be removed with legacy support.
432 */
433 if (dp->ds->devlink)
434 return -EOPNOTSUPP;
435
436 ppid->id_len = sizeof(dst->index);
437 memcpy(&ppid->id, &dst->index, ppid->id_len);
438
439 return 0;
440 }
441
442 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
443 struct sk_buff *skb)
444 {
445 #ifdef CONFIG_NET_POLL_CONTROLLER
446 struct dsa_slave_priv *p = netdev_priv(dev);
447
448 return netpoll_send_skb(p->netpoll, skb);
449 #else
450 BUG();
451 return NETDEV_TX_OK;
452 #endif
453 }
454
455 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
456 struct sk_buff *skb)
457 {
458 struct dsa_switch *ds = p->dp->ds;
459 struct sk_buff *clone;
460 unsigned int type;
461
462 type = ptp_classify_raw(skb);
463 if (type == PTP_CLASS_NONE)
464 return;
465
466 if (!ds->ops->port_txtstamp)
467 return;
468
469 clone = skb_clone_sk(skb);
470 if (!clone)
471 return;
472
473 DSA_SKB_CB(skb)->clone = clone;
474
475 if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type))
476 return;
477
478 kfree_skb(clone);
479 }
480
481 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
482 {
483 /* SKB for netpoll still need to be mangled with the protocol-specific
484 * tag to be successfully transmitted
485 */
486 if (unlikely(netpoll_tx_running(dev)))
487 return dsa_slave_netpoll_send_skb(dev, skb);
488
489 /* Queue the SKB for transmission on the parent interface, but
490 * do not modify its EtherType
491 */
492 skb->dev = dsa_slave_to_master(dev);
493 dev_queue_xmit(skb);
494
495 return NETDEV_TX_OK;
496 }
497 EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
498
499 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
500 {
501 struct dsa_slave_priv *p = netdev_priv(dev);
502 struct pcpu_sw_netstats *s;
503 struct sk_buff *nskb;
504
505 s = this_cpu_ptr(p->stats64);
506 u64_stats_update_begin(&s->syncp);
507 s->tx_packets++;
508 s->tx_bytes += skb->len;
509 u64_stats_update_end(&s->syncp);
510
511 DSA_SKB_CB(skb)->clone = NULL;
512
513 /* Identify PTP protocol packets, clone them, and pass them to the
514 * switch driver
515 */
516 dsa_skb_tx_timestamp(p, skb);
517
518 /* Transmit function may have to reallocate the original SKB,
519 * in which case it must have freed it. Only free it here on error.
520 */
521 nskb = p->xmit(skb, dev);
522 if (!nskb) {
523 kfree_skb(skb);
524 return NETDEV_TX_OK;
525 }
526
527 return dsa_enqueue_skb(nskb, dev);
528 }
529
530 /* ethtool operations *******************************************************/
531
532 static void dsa_slave_get_drvinfo(struct net_device *dev,
533 struct ethtool_drvinfo *drvinfo)
534 {
535 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
536 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
537 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
538 }
539
540 static int dsa_slave_get_regs_len(struct net_device *dev)
541 {
542 struct dsa_port *dp = dsa_slave_to_port(dev);
543 struct dsa_switch *ds = dp->ds;
544
545 if (ds->ops->get_regs_len)
546 return ds->ops->get_regs_len(ds, dp->index);
547
548 return -EOPNOTSUPP;
549 }
550
551 static void
552 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
553 {
554 struct dsa_port *dp = dsa_slave_to_port(dev);
555 struct dsa_switch *ds = dp->ds;
556
557 if (ds->ops->get_regs)
558 ds->ops->get_regs(ds, dp->index, regs, _p);
559 }
560
561 static int dsa_slave_nway_reset(struct net_device *dev)
562 {
563 struct dsa_port *dp = dsa_slave_to_port(dev);
564
565 return phylink_ethtool_nway_reset(dp->pl);
566 }
567
568 static int dsa_slave_get_eeprom_len(struct net_device *dev)
569 {
570 struct dsa_port *dp = dsa_slave_to_port(dev);
571 struct dsa_switch *ds = dp->ds;
572
573 if (ds->cd && ds->cd->eeprom_len)
574 return ds->cd->eeprom_len;
575
576 if (ds->ops->get_eeprom_len)
577 return ds->ops->get_eeprom_len(ds);
578
579 return 0;
580 }
581
582 static int dsa_slave_get_eeprom(struct net_device *dev,
583 struct ethtool_eeprom *eeprom, u8 *data)
584 {
585 struct dsa_port *dp = dsa_slave_to_port(dev);
586 struct dsa_switch *ds = dp->ds;
587
588 if (ds->ops->get_eeprom)
589 return ds->ops->get_eeprom(ds, eeprom, data);
590
591 return -EOPNOTSUPP;
592 }
593
594 static int dsa_slave_set_eeprom(struct net_device *dev,
595 struct ethtool_eeprom *eeprom, u8 *data)
596 {
597 struct dsa_port *dp = dsa_slave_to_port(dev);
598 struct dsa_switch *ds = dp->ds;
599
600 if (ds->ops->set_eeprom)
601 return ds->ops->set_eeprom(ds, eeprom, data);
602
603 return -EOPNOTSUPP;
604 }
605
606 static void dsa_slave_get_strings(struct net_device *dev,
607 uint32_t stringset, uint8_t *data)
608 {
609 struct dsa_port *dp = dsa_slave_to_port(dev);
610 struct dsa_switch *ds = dp->ds;
611
612 if (stringset == ETH_SS_STATS) {
613 int len = ETH_GSTRING_LEN;
614
615 strncpy(data, "tx_packets", len);
616 strncpy(data + len, "tx_bytes", len);
617 strncpy(data + 2 * len, "rx_packets", len);
618 strncpy(data + 3 * len, "rx_bytes", len);
619 if (ds->ops->get_strings)
620 ds->ops->get_strings(ds, dp->index, stringset,
621 data + 4 * len);
622 }
623 }
624
625 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
626 struct ethtool_stats *stats,
627 uint64_t *data)
628 {
629 struct dsa_port *dp = dsa_slave_to_port(dev);
630 struct dsa_slave_priv *p = netdev_priv(dev);
631 struct dsa_switch *ds = dp->ds;
632 struct pcpu_sw_netstats *s;
633 unsigned int start;
634 int i;
635
636 for_each_possible_cpu(i) {
637 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
638
639 s = per_cpu_ptr(p->stats64, i);
640 do {
641 start = u64_stats_fetch_begin_irq(&s->syncp);
642 tx_packets = s->tx_packets;
643 tx_bytes = s->tx_bytes;
644 rx_packets = s->rx_packets;
645 rx_bytes = s->rx_bytes;
646 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
647 data[0] += tx_packets;
648 data[1] += tx_bytes;
649 data[2] += rx_packets;
650 data[3] += rx_bytes;
651 }
652 if (ds->ops->get_ethtool_stats)
653 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
654 }
655
656 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
657 {
658 struct dsa_port *dp = dsa_slave_to_port(dev);
659 struct dsa_switch *ds = dp->ds;
660
661 if (sset == ETH_SS_STATS) {
662 int count;
663
664 count = 4;
665 if (ds->ops->get_sset_count)
666 count += ds->ops->get_sset_count(ds, dp->index, sset);
667
668 return count;
669 }
670
671 return -EOPNOTSUPP;
672 }
673
674 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
675 {
676 struct dsa_port *dp = dsa_slave_to_port(dev);
677 struct dsa_switch *ds = dp->ds;
678
679 phylink_ethtool_get_wol(dp->pl, w);
680
681 if (ds->ops->get_wol)
682 ds->ops->get_wol(ds, dp->index, w);
683 }
684
685 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
686 {
687 struct dsa_port *dp = dsa_slave_to_port(dev);
688 struct dsa_switch *ds = dp->ds;
689 int ret = -EOPNOTSUPP;
690
691 phylink_ethtool_set_wol(dp->pl, w);
692
693 if (ds->ops->set_wol)
694 ret = ds->ops->set_wol(ds, dp->index, w);
695
696 return ret;
697 }
698
699 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
700 {
701 struct dsa_port *dp = dsa_slave_to_port(dev);
702 struct dsa_switch *ds = dp->ds;
703 int ret;
704
705 /* Port's PHY and MAC both need to be EEE capable */
706 if (!dev->phydev || !dp->pl)
707 return -ENODEV;
708
709 if (!ds->ops->set_mac_eee)
710 return -EOPNOTSUPP;
711
712 ret = ds->ops->set_mac_eee(ds, dp->index, e);
713 if (ret)
714 return ret;
715
716 return phylink_ethtool_set_eee(dp->pl, e);
717 }
718
719 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
720 {
721 struct dsa_port *dp = dsa_slave_to_port(dev);
722 struct dsa_switch *ds = dp->ds;
723 int ret;
724
725 /* Port's PHY and MAC both need to be EEE capable */
726 if (!dev->phydev || !dp->pl)
727 return -ENODEV;
728
729 if (!ds->ops->get_mac_eee)
730 return -EOPNOTSUPP;
731
732 ret = ds->ops->get_mac_eee(ds, dp->index, e);
733 if (ret)
734 return ret;
735
736 return phylink_ethtool_get_eee(dp->pl, e);
737 }
738
739 static int dsa_slave_get_link_ksettings(struct net_device *dev,
740 struct ethtool_link_ksettings *cmd)
741 {
742 struct dsa_port *dp = dsa_slave_to_port(dev);
743
744 return phylink_ethtool_ksettings_get(dp->pl, cmd);
745 }
746
747 static int dsa_slave_set_link_ksettings(struct net_device *dev,
748 const struct ethtool_link_ksettings *cmd)
749 {
750 struct dsa_port *dp = dsa_slave_to_port(dev);
751
752 return phylink_ethtool_ksettings_set(dp->pl, cmd);
753 }
754
755 static void dsa_slave_get_pauseparam(struct net_device *dev,
756 struct ethtool_pauseparam *pause)
757 {
758 struct dsa_port *dp = dsa_slave_to_port(dev);
759
760 phylink_ethtool_get_pauseparam(dp->pl, pause);
761 }
762
763 static int dsa_slave_set_pauseparam(struct net_device *dev,
764 struct ethtool_pauseparam *pause)
765 {
766 struct dsa_port *dp = dsa_slave_to_port(dev);
767
768 return phylink_ethtool_set_pauseparam(dp->pl, pause);
769 }
770
771 #ifdef CONFIG_NET_POLL_CONTROLLER
772 static int dsa_slave_netpoll_setup(struct net_device *dev,
773 struct netpoll_info *ni)
774 {
775 struct net_device *master = dsa_slave_to_master(dev);
776 struct dsa_slave_priv *p = netdev_priv(dev);
777 struct netpoll *netpoll;
778 int err = 0;
779
780 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
781 if (!netpoll)
782 return -ENOMEM;
783
784 err = __netpoll_setup(netpoll, master);
785 if (err) {
786 kfree(netpoll);
787 goto out;
788 }
789
790 p->netpoll = netpoll;
791 out:
792 return err;
793 }
794
795 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
796 {
797 struct dsa_slave_priv *p = netdev_priv(dev);
798 struct netpoll *netpoll = p->netpoll;
799
800 if (!netpoll)
801 return;
802
803 p->netpoll = NULL;
804
805 __netpoll_free(netpoll);
806 }
807
808 static void dsa_slave_poll_controller(struct net_device *dev)
809 {
810 }
811 #endif
812
813 static int dsa_slave_get_phys_port_name(struct net_device *dev,
814 char *name, size_t len)
815 {
816 struct dsa_port *dp = dsa_slave_to_port(dev);
817
818 /* For non-legacy ports, devlink is used and it takes
819 * care of the name generation. This ndo implementation
820 * should be removed with legacy support.
821 */
822 if (dp->ds->devlink)
823 return -EOPNOTSUPP;
824
825 if (snprintf(name, len, "p%d", dp->index) >= len)
826 return -EINVAL;
827
828 return 0;
829 }
830
831 static struct dsa_mall_tc_entry *
832 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
833 {
834 struct dsa_slave_priv *p = netdev_priv(dev);
835 struct dsa_mall_tc_entry *mall_tc_entry;
836
837 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
838 if (mall_tc_entry->cookie == cookie)
839 return mall_tc_entry;
840
841 return NULL;
842 }
843
844 static int
845 dsa_slave_add_cls_matchall_mirred(struct net_device *dev,
846 struct tc_cls_matchall_offload *cls,
847 bool ingress)
848 {
849 struct dsa_port *dp = dsa_slave_to_port(dev);
850 struct dsa_slave_priv *p = netdev_priv(dev);
851 struct dsa_mall_mirror_tc_entry *mirror;
852 struct dsa_mall_tc_entry *mall_tc_entry;
853 struct dsa_switch *ds = dp->ds;
854 struct flow_action_entry *act;
855 struct dsa_port *to_dp;
856 int err;
857
858 if (!ds->ops->port_mirror_add)
859 return -EOPNOTSUPP;
860
861 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
862 cls->common.extack))
863 return -EOPNOTSUPP;
864
865 act = &cls->rule->action.entries[0];
866
867 if (!act->dev)
868 return -EINVAL;
869
870 if (!dsa_slave_dev_check(act->dev))
871 return -EOPNOTSUPP;
872
873 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
874 if (!mall_tc_entry)
875 return -ENOMEM;
876
877 mall_tc_entry->cookie = cls->cookie;
878 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
879 mirror = &mall_tc_entry->mirror;
880
881 to_dp = dsa_slave_to_port(act->dev);
882
883 mirror->to_local_port = to_dp->index;
884 mirror->ingress = ingress;
885
886 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
887 if (err) {
888 kfree(mall_tc_entry);
889 return err;
890 }
891
892 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
893
894 return err;
895 }
896
897 static int
898 dsa_slave_add_cls_matchall_police(struct net_device *dev,
899 struct tc_cls_matchall_offload *cls,
900 bool ingress)
901 {
902 struct netlink_ext_ack *extack = cls->common.extack;
903 struct dsa_port *dp = dsa_slave_to_port(dev);
904 struct dsa_slave_priv *p = netdev_priv(dev);
905 struct dsa_mall_policer_tc_entry *policer;
906 struct dsa_mall_tc_entry *mall_tc_entry;
907 struct dsa_switch *ds = dp->ds;
908 struct flow_action_entry *act;
909 int err;
910
911 if (!ds->ops->port_policer_add) {
912 NL_SET_ERR_MSG_MOD(extack,
913 "Policing offload not implemented");
914 return -EOPNOTSUPP;
915 }
916
917 if (!ingress) {
918 NL_SET_ERR_MSG_MOD(extack,
919 "Only supported on ingress qdisc");
920 return -EOPNOTSUPP;
921 }
922
923 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
924 cls->common.extack))
925 return -EOPNOTSUPP;
926
927 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) {
928 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) {
929 NL_SET_ERR_MSG_MOD(extack,
930 "Only one port policer allowed");
931 return -EEXIST;
932 }
933 }
934
935 act = &cls->rule->action.entries[0];
936
937 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
938 if (!mall_tc_entry)
939 return -ENOMEM;
940
941 mall_tc_entry->cookie = cls->cookie;
942 mall_tc_entry->type = DSA_PORT_MALL_POLICER;
943 policer = &mall_tc_entry->policer;
944 policer->rate_bytes_per_sec = act->police.rate_bytes_ps;
945 policer->burst = act->police.burst;
946
947 err = ds->ops->port_policer_add(ds, dp->index, policer);
948 if (err) {
949 kfree(mall_tc_entry);
950 return err;
951 }
952
953 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
954
955 return err;
956 }
957
958 static int dsa_slave_add_cls_matchall(struct net_device *dev,
959 struct tc_cls_matchall_offload *cls,
960 bool ingress)
961 {
962 int err = -EOPNOTSUPP;
963
964 if (cls->common.protocol == htons(ETH_P_ALL) &&
965 flow_offload_has_one_action(&cls->rule->action) &&
966 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED)
967 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress);
968 else if (flow_offload_has_one_action(&cls->rule->action) &&
969 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE)
970 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress);
971
972 return err;
973 }
974
975 static void dsa_slave_del_cls_matchall(struct net_device *dev,
976 struct tc_cls_matchall_offload *cls)
977 {
978 struct dsa_port *dp = dsa_slave_to_port(dev);
979 struct dsa_mall_tc_entry *mall_tc_entry;
980 struct dsa_switch *ds = dp->ds;
981
982 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
983 if (!mall_tc_entry)
984 return;
985
986 list_del(&mall_tc_entry->list);
987
988 switch (mall_tc_entry->type) {
989 case DSA_PORT_MALL_MIRROR:
990 if (ds->ops->port_mirror_del)
991 ds->ops->port_mirror_del(ds, dp->index,
992 &mall_tc_entry->mirror);
993 break;
994 case DSA_PORT_MALL_POLICER:
995 if (ds->ops->port_policer_del)
996 ds->ops->port_policer_del(ds, dp->index);
997 break;
998 default:
999 WARN_ON(1);
1000 }
1001
1002 kfree(mall_tc_entry);
1003 }
1004
1005 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
1006 struct tc_cls_matchall_offload *cls,
1007 bool ingress)
1008 {
1009 if (cls->common.chain_index)
1010 return -EOPNOTSUPP;
1011
1012 switch (cls->command) {
1013 case TC_CLSMATCHALL_REPLACE:
1014 return dsa_slave_add_cls_matchall(dev, cls, ingress);
1015 case TC_CLSMATCHALL_DESTROY:
1016 dsa_slave_del_cls_matchall(dev, cls);
1017 return 0;
1018 default:
1019 return -EOPNOTSUPP;
1020 }
1021 }
1022
1023 static int dsa_slave_add_cls_flower(struct net_device *dev,
1024 struct flow_cls_offload *cls,
1025 bool ingress)
1026 {
1027 struct dsa_port *dp = dsa_slave_to_port(dev);
1028 struct dsa_switch *ds = dp->ds;
1029 int port = dp->index;
1030
1031 if (!ds->ops->cls_flower_add)
1032 return -EOPNOTSUPP;
1033
1034 return ds->ops->cls_flower_add(ds, port, cls, ingress);
1035 }
1036
1037 static int dsa_slave_del_cls_flower(struct net_device *dev,
1038 struct flow_cls_offload *cls,
1039 bool ingress)
1040 {
1041 struct dsa_port *dp = dsa_slave_to_port(dev);
1042 struct dsa_switch *ds = dp->ds;
1043 int port = dp->index;
1044
1045 if (!ds->ops->cls_flower_del)
1046 return -EOPNOTSUPP;
1047
1048 return ds->ops->cls_flower_del(ds, port, cls, ingress);
1049 }
1050
1051 static int dsa_slave_stats_cls_flower(struct net_device *dev,
1052 struct flow_cls_offload *cls,
1053 bool ingress)
1054 {
1055 struct dsa_port *dp = dsa_slave_to_port(dev);
1056 struct dsa_switch *ds = dp->ds;
1057 int port = dp->index;
1058
1059 if (!ds->ops->cls_flower_stats)
1060 return -EOPNOTSUPP;
1061
1062 return ds->ops->cls_flower_stats(ds, port, cls, ingress);
1063 }
1064
1065 static int dsa_slave_setup_tc_cls_flower(struct net_device *dev,
1066 struct flow_cls_offload *cls,
1067 bool ingress)
1068 {
1069 switch (cls->command) {
1070 case FLOW_CLS_REPLACE:
1071 return dsa_slave_add_cls_flower(dev, cls, ingress);
1072 case FLOW_CLS_DESTROY:
1073 return dsa_slave_del_cls_flower(dev, cls, ingress);
1074 case FLOW_CLS_STATS:
1075 return dsa_slave_stats_cls_flower(dev, cls, ingress);
1076 default:
1077 return -EOPNOTSUPP;
1078 }
1079 }
1080
1081 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
1082 void *cb_priv, bool ingress)
1083 {
1084 struct net_device *dev = cb_priv;
1085
1086 if (!tc_can_offload(dev))
1087 return -EOPNOTSUPP;
1088
1089 switch (type) {
1090 case TC_SETUP_CLSMATCHALL:
1091 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
1092 case TC_SETUP_CLSFLOWER:
1093 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress);
1094 default:
1095 return -EOPNOTSUPP;
1096 }
1097 }
1098
1099 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
1100 void *type_data, void *cb_priv)
1101 {
1102 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
1103 }
1104
1105 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
1106 void *type_data, void *cb_priv)
1107 {
1108 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
1109 }
1110
1111 static LIST_HEAD(dsa_slave_block_cb_list);
1112
1113 static int dsa_slave_setup_tc_block(struct net_device *dev,
1114 struct flow_block_offload *f)
1115 {
1116 struct flow_block_cb *block_cb;
1117 flow_setup_cb_t *cb;
1118
1119 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
1120 cb = dsa_slave_setup_tc_block_cb_ig;
1121 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
1122 cb = dsa_slave_setup_tc_block_cb_eg;
1123 else
1124 return -EOPNOTSUPP;
1125
1126 f->driver_block_list = &dsa_slave_block_cb_list;
1127
1128 switch (f->command) {
1129 case FLOW_BLOCK_BIND:
1130 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list))
1131 return -EBUSY;
1132
1133 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL);
1134 if (IS_ERR(block_cb))
1135 return PTR_ERR(block_cb);
1136
1137 flow_block_cb_add(block_cb, f);
1138 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list);
1139 return 0;
1140 case FLOW_BLOCK_UNBIND:
1141 block_cb = flow_block_cb_lookup(f->block, cb, dev);
1142 if (!block_cb)
1143 return -ENOENT;
1144
1145 flow_block_cb_remove(block_cb, f);
1146 list_del(&block_cb->driver_list);
1147 return 0;
1148 default:
1149 return -EOPNOTSUPP;
1150 }
1151 }
1152
1153 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
1154 void *type_data)
1155 {
1156 struct dsa_port *dp = dsa_slave_to_port(dev);
1157 struct dsa_switch *ds = dp->ds;
1158
1159 if (type == TC_SETUP_BLOCK)
1160 return dsa_slave_setup_tc_block(dev, type_data);
1161
1162 if (!ds->ops->port_setup_tc)
1163 return -EOPNOTSUPP;
1164
1165 return ds->ops->port_setup_tc(ds, dp->index, type, type_data);
1166 }
1167
1168 static void dsa_slave_get_stats64(struct net_device *dev,
1169 struct rtnl_link_stats64 *stats)
1170 {
1171 struct dsa_slave_priv *p = netdev_priv(dev);
1172 struct pcpu_sw_netstats *s;
1173 unsigned int start;
1174 int i;
1175
1176 netdev_stats_to_stats64(stats, &dev->stats);
1177 for_each_possible_cpu(i) {
1178 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
1179
1180 s = per_cpu_ptr(p->stats64, i);
1181 do {
1182 start = u64_stats_fetch_begin_irq(&s->syncp);
1183 tx_packets = s->tx_packets;
1184 tx_bytes = s->tx_bytes;
1185 rx_packets = s->rx_packets;
1186 rx_bytes = s->rx_bytes;
1187 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
1188
1189 stats->tx_packets += tx_packets;
1190 stats->tx_bytes += tx_bytes;
1191 stats->rx_packets += rx_packets;
1192 stats->rx_bytes += rx_bytes;
1193 }
1194 }
1195
1196 static int dsa_slave_get_rxnfc(struct net_device *dev,
1197 struct ethtool_rxnfc *nfc, u32 *rule_locs)
1198 {
1199 struct dsa_port *dp = dsa_slave_to_port(dev);
1200 struct dsa_switch *ds = dp->ds;
1201
1202 if (!ds->ops->get_rxnfc)
1203 return -EOPNOTSUPP;
1204
1205 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
1206 }
1207
1208 static int dsa_slave_set_rxnfc(struct net_device *dev,
1209 struct ethtool_rxnfc *nfc)
1210 {
1211 struct dsa_port *dp = dsa_slave_to_port(dev);
1212 struct dsa_switch *ds = dp->ds;
1213
1214 if (!ds->ops->set_rxnfc)
1215 return -EOPNOTSUPP;
1216
1217 return ds->ops->set_rxnfc(ds, dp->index, nfc);
1218 }
1219
1220 static int dsa_slave_get_ts_info(struct net_device *dev,
1221 struct ethtool_ts_info *ts)
1222 {
1223 struct dsa_slave_priv *p = netdev_priv(dev);
1224 struct dsa_switch *ds = p->dp->ds;
1225
1226 if (!ds->ops->get_ts_info)
1227 return -EOPNOTSUPP;
1228
1229 return ds->ops->get_ts_info(ds, p->dp->index, ts);
1230 }
1231
1232 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
1233 u16 vid)
1234 {
1235 struct dsa_port *dp = dsa_slave_to_port(dev);
1236 struct bridge_vlan_info info;
1237 int ret;
1238
1239 /* Check for a possible bridge VLAN entry now since there is no
1240 * need to emulate the switchdev prepare + commit phase.
1241 */
1242 if (dp->bridge_dev) {
1243 if (dsa_port_skip_vlan_configuration(dp))
1244 return 0;
1245
1246 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
1247 * device, respectively the VID is not found, returning
1248 * 0 means success, which is a failure for us here.
1249 */
1250 ret = br_vlan_get_info(dp->bridge_dev, vid, &info);
1251 if (ret == 0)
1252 return -EBUSY;
1253 }
1254
1255 ret = dsa_port_vid_add(dp, vid, 0);
1256 if (ret)
1257 return ret;
1258
1259 ret = dsa_port_vid_add(dp->cpu_dp, vid, 0);
1260 if (ret)
1261 return ret;
1262
1263 return 0;
1264 }
1265
1266 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
1267 u16 vid)
1268 {
1269 struct dsa_port *dp = dsa_slave_to_port(dev);
1270 struct bridge_vlan_info info;
1271 int ret;
1272
1273 /* Check for a possible bridge VLAN entry now since there is no
1274 * need to emulate the switchdev prepare + commit phase.
1275 */
1276 if (dp->bridge_dev) {
1277 if (dsa_port_skip_vlan_configuration(dp))
1278 return 0;
1279
1280 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
1281 * device, respectively the VID is not found, returning
1282 * 0 means success, which is a failure for us here.
1283 */
1284 ret = br_vlan_get_info(dp->bridge_dev, vid, &info);
1285 if (ret == 0)
1286 return -EBUSY;
1287 }
1288
1289 /* Do not deprogram the CPU port as it may be shared with other user
1290 * ports which can be members of this VLAN as well.
1291 */
1292 return dsa_port_vid_del(dp, vid);
1293 }
1294
1295 struct dsa_hw_port {
1296 struct list_head list;
1297 struct net_device *dev;
1298 int old_mtu;
1299 };
1300
1301 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu)
1302 {
1303 const struct dsa_hw_port *p;
1304 int err;
1305
1306 list_for_each_entry(p, hw_port_list, list) {
1307 if (p->dev->mtu == mtu)
1308 continue;
1309
1310 err = dev_set_mtu(p->dev, mtu);
1311 if (err)
1312 goto rollback;
1313 }
1314
1315 return 0;
1316
1317 rollback:
1318 list_for_each_entry_continue_reverse(p, hw_port_list, list) {
1319 if (p->dev->mtu == p->old_mtu)
1320 continue;
1321
1322 if (dev_set_mtu(p->dev, p->old_mtu))
1323 netdev_err(p->dev, "Failed to restore MTU\n");
1324 }
1325
1326 return err;
1327 }
1328
1329 static void dsa_hw_port_list_free(struct list_head *hw_port_list)
1330 {
1331 struct dsa_hw_port *p, *n;
1332
1333 list_for_each_entry_safe(p, n, hw_port_list, list)
1334 kfree(p);
1335 }
1336
1337 /* Make the hardware datapath to/from @dev limited to a common MTU */
1338 static void dsa_bridge_mtu_normalization(struct dsa_port *dp)
1339 {
1340 struct list_head hw_port_list;
1341 struct dsa_switch_tree *dst;
1342 int min_mtu = ETH_MAX_MTU;
1343 struct dsa_port *other_dp;
1344 int err;
1345
1346 if (!dp->ds->mtu_enforcement_ingress)
1347 return;
1348
1349 if (!dp->bridge_dev)
1350 return;
1351
1352 INIT_LIST_HEAD(&hw_port_list);
1353
1354 /* Populate the list of ports that are part of the same bridge
1355 * as the newly added/modified port
1356 */
1357 list_for_each_entry(dst, &dsa_tree_list, list) {
1358 list_for_each_entry(other_dp, &dst->ports, list) {
1359 struct dsa_hw_port *hw_port;
1360 struct net_device *slave;
1361
1362 if (other_dp->type != DSA_PORT_TYPE_USER)
1363 continue;
1364
1365 if (other_dp->bridge_dev != dp->bridge_dev)
1366 continue;
1367
1368 if (!other_dp->ds->mtu_enforcement_ingress)
1369 continue;
1370
1371 slave = other_dp->slave;
1372
1373 if (min_mtu > slave->mtu)
1374 min_mtu = slave->mtu;
1375
1376 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL);
1377 if (!hw_port)
1378 goto out;
1379
1380 hw_port->dev = slave;
1381 hw_port->old_mtu = slave->mtu;
1382
1383 list_add(&hw_port->list, &hw_port_list);
1384 }
1385 }
1386
1387 /* Attempt to configure the entire hardware bridge to the newly added
1388 * interface's MTU first, regardless of whether the intention of the
1389 * user was to raise or lower it.
1390 */
1391 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu);
1392 if (!err)
1393 goto out;
1394
1395 /* Clearly that didn't work out so well, so just set the minimum MTU on
1396 * all hardware bridge ports now. If this fails too, then all ports will
1397 * still have their old MTU rolled back anyway.
1398 */
1399 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu);
1400
1401 out:
1402 dsa_hw_port_list_free(&hw_port_list);
1403 }
1404
1405 static int dsa_slave_change_mtu(struct net_device *dev, int new_mtu)
1406 {
1407 struct net_device *master = dsa_slave_to_master(dev);
1408 struct dsa_port *dp = dsa_slave_to_port(dev);
1409 struct dsa_slave_priv *p = netdev_priv(dev);
1410 struct dsa_switch *ds = p->dp->ds;
1411 struct dsa_port *cpu_dp;
1412 int port = p->dp->index;
1413 int largest_mtu = 0;
1414 int new_master_mtu;
1415 int old_master_mtu;
1416 int mtu_limit;
1417 int cpu_mtu;
1418 int err, i;
1419
1420 if (!ds->ops->port_change_mtu)
1421 return -EOPNOTSUPP;
1422
1423 for (i = 0; i < ds->num_ports; i++) {
1424 int slave_mtu;
1425
1426 if (!dsa_is_user_port(ds, i))
1427 continue;
1428
1429 /* During probe, this function will be called for each slave
1430 * device, while not all of them have been allocated. That's
1431 * ok, it doesn't change what the maximum is, so ignore it.
1432 */
1433 if (!dsa_to_port(ds, i)->slave)
1434 continue;
1435
1436 /* Pretend that we already applied the setting, which we
1437 * actually haven't (still haven't done all integrity checks)
1438 */
1439 if (i == port)
1440 slave_mtu = new_mtu;
1441 else
1442 slave_mtu = dsa_to_port(ds, i)->slave->mtu;
1443
1444 if (largest_mtu < slave_mtu)
1445 largest_mtu = slave_mtu;
1446 }
1447
1448 cpu_dp = dsa_to_port(ds, port)->cpu_dp;
1449
1450 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu);
1451 old_master_mtu = master->mtu;
1452 new_master_mtu = largest_mtu + cpu_dp->tag_ops->overhead;
1453 if (new_master_mtu > mtu_limit)
1454 return -ERANGE;
1455
1456 /* If the master MTU isn't over limit, there's no need to check the CPU
1457 * MTU, since that surely isn't either.
1458 */
1459 cpu_mtu = largest_mtu;
1460
1461 /* Start applying stuff */
1462 if (new_master_mtu != old_master_mtu) {
1463 err = dev_set_mtu(master, new_master_mtu);
1464 if (err < 0)
1465 goto out_master_failed;
1466
1467 /* We only need to propagate the MTU of the CPU port to
1468 * upstream switches.
1469 */
1470 err = dsa_port_mtu_change(cpu_dp, cpu_mtu, true);
1471 if (err)
1472 goto out_cpu_failed;
1473 }
1474
1475 err = dsa_port_mtu_change(dp, new_mtu, false);
1476 if (err)
1477 goto out_port_failed;
1478
1479 dev->mtu = new_mtu;
1480
1481 dsa_bridge_mtu_normalization(dp);
1482
1483 return 0;
1484
1485 out_port_failed:
1486 if (new_master_mtu != old_master_mtu)
1487 dsa_port_mtu_change(cpu_dp, old_master_mtu -
1488 cpu_dp->tag_ops->overhead,
1489 true);
1490 out_cpu_failed:
1491 if (new_master_mtu != old_master_mtu)
1492 dev_set_mtu(master, old_master_mtu);
1493 out_master_failed:
1494 return err;
1495 }
1496
1497 static const struct ethtool_ops dsa_slave_ethtool_ops = {
1498 .get_drvinfo = dsa_slave_get_drvinfo,
1499 .get_regs_len = dsa_slave_get_regs_len,
1500 .get_regs = dsa_slave_get_regs,
1501 .nway_reset = dsa_slave_nway_reset,
1502 .get_link = ethtool_op_get_link,
1503 .get_eeprom_len = dsa_slave_get_eeprom_len,
1504 .get_eeprom = dsa_slave_get_eeprom,
1505 .set_eeprom = dsa_slave_set_eeprom,
1506 .get_strings = dsa_slave_get_strings,
1507 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
1508 .get_sset_count = dsa_slave_get_sset_count,
1509 .set_wol = dsa_slave_set_wol,
1510 .get_wol = dsa_slave_get_wol,
1511 .set_eee = dsa_slave_set_eee,
1512 .get_eee = dsa_slave_get_eee,
1513 .get_link_ksettings = dsa_slave_get_link_ksettings,
1514 .set_link_ksettings = dsa_slave_set_link_ksettings,
1515 .get_pauseparam = dsa_slave_get_pauseparam,
1516 .set_pauseparam = dsa_slave_set_pauseparam,
1517 .get_rxnfc = dsa_slave_get_rxnfc,
1518 .set_rxnfc = dsa_slave_set_rxnfc,
1519 .get_ts_info = dsa_slave_get_ts_info,
1520 };
1521
1522 /* legacy way, bypassing the bridge *****************************************/
1523 int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
1524 struct net_device *dev,
1525 const unsigned char *addr, u16 vid,
1526 u16 flags,
1527 struct netlink_ext_ack *extack)
1528 {
1529 struct dsa_port *dp = dsa_slave_to_port(dev);
1530
1531 return dsa_port_fdb_add(dp, addr, vid);
1532 }
1533
1534 int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
1535 struct net_device *dev,
1536 const unsigned char *addr, u16 vid)
1537 {
1538 struct dsa_port *dp = dsa_slave_to_port(dev);
1539
1540 return dsa_port_fdb_del(dp, addr, vid);
1541 }
1542
1543 static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
1544 {
1545 struct dsa_port *dp = dsa_slave_to_port(dev);
1546
1547 return dp->ds->devlink ? &dp->devlink_port : NULL;
1548 }
1549
1550 static const struct net_device_ops dsa_slave_netdev_ops = {
1551 .ndo_open = dsa_slave_open,
1552 .ndo_stop = dsa_slave_close,
1553 .ndo_start_xmit = dsa_slave_xmit,
1554 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
1555 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
1556 .ndo_set_mac_address = dsa_slave_set_mac_address,
1557 .ndo_fdb_add = dsa_legacy_fdb_add,
1558 .ndo_fdb_del = dsa_legacy_fdb_del,
1559 .ndo_fdb_dump = dsa_slave_fdb_dump,
1560 .ndo_do_ioctl = dsa_slave_ioctl,
1561 .ndo_get_iflink = dsa_slave_get_iflink,
1562 #ifdef CONFIG_NET_POLL_CONTROLLER
1563 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
1564 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
1565 .ndo_poll_controller = dsa_slave_poll_controller,
1566 #endif
1567 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
1568 .ndo_setup_tc = dsa_slave_setup_tc,
1569 .ndo_get_stats64 = dsa_slave_get_stats64,
1570 .ndo_get_port_parent_id = dsa_slave_get_port_parent_id,
1571 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
1572 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
1573 .ndo_get_devlink_port = dsa_slave_get_devlink_port,
1574 .ndo_change_mtu = dsa_slave_change_mtu,
1575 };
1576
1577 static struct device_type dsa_type = {
1578 .name = "dsa",
1579 };
1580
1581 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
1582 {
1583 const struct dsa_port *dp = dsa_to_port(ds, port);
1584
1585 if (dp->pl)
1586 phylink_mac_change(dp->pl, up);
1587 }
1588 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
1589
1590 static void dsa_slave_phylink_fixed_state(struct phylink_config *config,
1591 struct phylink_link_state *state)
1592 {
1593 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1594 struct dsa_switch *ds = dp->ds;
1595
1596 /* No need to check that this operation is valid, the callback would
1597 * not be called if it was not.
1598 */
1599 ds->ops->phylink_fixed_state(ds, dp->index, state);
1600 }
1601
1602 /* slave device setup *******************************************************/
1603 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
1604 {
1605 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1606 struct dsa_switch *ds = dp->ds;
1607
1608 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
1609 if (!slave_dev->phydev) {
1610 netdev_err(slave_dev, "no phy at %d\n", addr);
1611 return -ENODEV;
1612 }
1613
1614 return phylink_connect_phy(dp->pl, slave_dev->phydev);
1615 }
1616
1617 static int dsa_slave_phy_setup(struct net_device *slave_dev)
1618 {
1619 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1620 struct device_node *port_dn = dp->dn;
1621 struct dsa_switch *ds = dp->ds;
1622 phy_interface_t mode;
1623 u32 phy_flags = 0;
1624 int ret;
1625
1626 ret = of_get_phy_mode(port_dn, &mode);
1627 if (ret)
1628 mode = PHY_INTERFACE_MODE_NA;
1629
1630 dp->pl_config.dev = &slave_dev->dev;
1631 dp->pl_config.type = PHYLINK_NETDEV;
1632
1633 /* The get_fixed_state callback takes precedence over polling the
1634 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set
1635 * this if the switch provides such a callback.
1636 */
1637 if (ds->ops->phylink_fixed_state) {
1638 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state;
1639 dp->pl_config.poll_fixed_state = true;
1640 }
1641
1642 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode,
1643 &dsa_port_phylink_mac_ops);
1644 if (IS_ERR(dp->pl)) {
1645 netdev_err(slave_dev,
1646 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1647 return PTR_ERR(dp->pl);
1648 }
1649
1650 if (ds->ops->get_phy_flags)
1651 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
1652
1653 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
1654 if (ret == -ENODEV && ds->slave_mii_bus) {
1655 /* We could not connect to a designated PHY or SFP, so try to
1656 * use the switch internal MDIO bus instead
1657 */
1658 ret = dsa_slave_phy_connect(slave_dev, dp->index);
1659 if (ret) {
1660 netdev_err(slave_dev,
1661 "failed to connect to port %d: %d\n",
1662 dp->index, ret);
1663 phylink_destroy(dp->pl);
1664 return ret;
1665 }
1666 }
1667
1668 return ret;
1669 }
1670
1671 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1672 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1673 struct netdev_queue *txq,
1674 void *_unused)
1675 {
1676 lockdep_set_class(&txq->_xmit_lock,
1677 &dsa_slave_netdev_xmit_lock_key);
1678 }
1679
1680 int dsa_slave_suspend(struct net_device *slave_dev)
1681 {
1682 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1683
1684 if (!netif_running(slave_dev))
1685 return 0;
1686
1687 netif_device_detach(slave_dev);
1688
1689 rtnl_lock();
1690 phylink_stop(dp->pl);
1691 rtnl_unlock();
1692
1693 return 0;
1694 }
1695
1696 int dsa_slave_resume(struct net_device *slave_dev)
1697 {
1698 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1699
1700 if (!netif_running(slave_dev))
1701 return 0;
1702
1703 netif_device_attach(slave_dev);
1704
1705 rtnl_lock();
1706 phylink_start(dp->pl);
1707 rtnl_unlock();
1708
1709 return 0;
1710 }
1711
1712 static void dsa_slave_notify(struct net_device *dev, unsigned long val)
1713 {
1714 struct net_device *master = dsa_slave_to_master(dev);
1715 struct dsa_port *dp = dsa_slave_to_port(dev);
1716 struct dsa_notifier_register_info rinfo = {
1717 .switch_number = dp->ds->index,
1718 .port_number = dp->index,
1719 .master = master,
1720 .info.dev = dev,
1721 };
1722
1723 call_dsa_notifiers(val, dev, &rinfo.info);
1724 }
1725
1726 int dsa_slave_create(struct dsa_port *port)
1727 {
1728 const struct dsa_port *cpu_dp = port->cpu_dp;
1729 struct net_device *master = cpu_dp->master;
1730 struct dsa_switch *ds = port->ds;
1731 const char *name = port->name;
1732 struct net_device *slave_dev;
1733 struct dsa_slave_priv *p;
1734 int ret;
1735
1736 if (!ds->num_tx_queues)
1737 ds->num_tx_queues = 1;
1738
1739 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
1740 NET_NAME_UNKNOWN, ether_setup,
1741 ds->num_tx_queues, 1);
1742 if (slave_dev == NULL)
1743 return -ENOMEM;
1744
1745 slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
1746 if (ds->ops->port_vlan_add && ds->ops->port_vlan_del)
1747 slave_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1748 slave_dev->hw_features |= NETIF_F_HW_TC;
1749 slave_dev->features |= NETIF_F_LLTX;
1750 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1751 if (!IS_ERR_OR_NULL(port->mac))
1752 ether_addr_copy(slave_dev->dev_addr, port->mac);
1753 else
1754 eth_hw_addr_inherit(slave_dev, master);
1755 slave_dev->priv_flags |= IFF_NO_QUEUE;
1756 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1757 if (ds->ops->port_max_mtu)
1758 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index);
1759 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1760
1761 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1762 NULL);
1763
1764 SET_NETDEV_DEV(slave_dev, port->ds->dev);
1765 slave_dev->dev.of_node = port->dn;
1766 slave_dev->vlan_features = master->vlan_features;
1767
1768 p = netdev_priv(slave_dev);
1769 p->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1770 if (!p->stats64) {
1771 free_netdev(slave_dev);
1772 return -ENOMEM;
1773 }
1774
1775 ret = gro_cells_init(&p->gcells, slave_dev);
1776 if (ret)
1777 goto out_free;
1778
1779 p->dp = port;
1780 INIT_LIST_HEAD(&p->mall_tc_list);
1781 p->xmit = cpu_dp->tag_ops->xmit;
1782 port->slave = slave_dev;
1783
1784 rtnl_lock();
1785 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN);
1786 rtnl_unlock();
1787 if (ret)
1788 dev_warn(ds->dev, "nonfatal error %d setting MTU on port %d\n",
1789 ret, port->index);
1790
1791 netif_carrier_off(slave_dev);
1792
1793 ret = dsa_slave_phy_setup(slave_dev);
1794 if (ret) {
1795 netdev_err(master, "error %d setting up slave PHY for %s\n",
1796 ret, slave_dev->name);
1797 goto out_gcells;
1798 }
1799
1800 dsa_slave_notify(slave_dev, DSA_PORT_REGISTER);
1801
1802 ret = register_netdev(slave_dev);
1803 if (ret) {
1804 netdev_err(master, "error %d registering interface %s\n",
1805 ret, slave_dev->name);
1806 goto out_phy;
1807 }
1808
1809 return 0;
1810
1811 out_phy:
1812 rtnl_lock();
1813 phylink_disconnect_phy(p->dp->pl);
1814 rtnl_unlock();
1815 phylink_destroy(p->dp->pl);
1816 out_gcells:
1817 gro_cells_destroy(&p->gcells);
1818 out_free:
1819 free_percpu(p->stats64);
1820 free_netdev(slave_dev);
1821 port->slave = NULL;
1822 return ret;
1823 }
1824
1825 void dsa_slave_destroy(struct net_device *slave_dev)
1826 {
1827 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1828 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1829
1830 netif_carrier_off(slave_dev);
1831 rtnl_lock();
1832 phylink_disconnect_phy(dp->pl);
1833 rtnl_unlock();
1834
1835 dsa_slave_notify(slave_dev, DSA_PORT_UNREGISTER);
1836 unregister_netdev(slave_dev);
1837 phylink_destroy(dp->pl);
1838 gro_cells_destroy(&p->gcells);
1839 free_percpu(p->stats64);
1840 free_netdev(slave_dev);
1841 }
1842
1843 bool dsa_slave_dev_check(const struct net_device *dev)
1844 {
1845 return dev->netdev_ops == &dsa_slave_netdev_ops;
1846 }
1847
1848 static int dsa_slave_changeupper(struct net_device *dev,
1849 struct netdev_notifier_changeupper_info *info)
1850 {
1851 struct dsa_port *dp = dsa_slave_to_port(dev);
1852 int err = NOTIFY_DONE;
1853
1854 if (netif_is_bridge_master(info->upper_dev)) {
1855 if (info->linking) {
1856 err = dsa_port_bridge_join(dp, info->upper_dev);
1857 if (!err)
1858 dsa_bridge_mtu_normalization(dp);
1859 err = notifier_from_errno(err);
1860 } else {
1861 dsa_port_bridge_leave(dp, info->upper_dev);
1862 err = NOTIFY_OK;
1863 }
1864 }
1865
1866 return err;
1867 }
1868
1869 static int dsa_slave_upper_vlan_check(struct net_device *dev,
1870 struct netdev_notifier_changeupper_info *
1871 info)
1872 {
1873 struct netlink_ext_ack *ext_ack;
1874 struct net_device *slave;
1875 struct dsa_port *dp;
1876
1877 ext_ack = netdev_notifier_info_to_extack(&info->info);
1878
1879 if (!is_vlan_dev(dev))
1880 return NOTIFY_DONE;
1881
1882 slave = vlan_dev_real_dev(dev);
1883 if (!dsa_slave_dev_check(slave))
1884 return NOTIFY_DONE;
1885
1886 dp = dsa_slave_to_port(slave);
1887 if (!dp->bridge_dev)
1888 return NOTIFY_DONE;
1889
1890 /* Deny enslaving a VLAN device into a VLAN-aware bridge */
1891 if (br_vlan_enabled(dp->bridge_dev) &&
1892 netif_is_bridge_master(info->upper_dev) && info->linking) {
1893 NL_SET_ERR_MSG_MOD(ext_ack,
1894 "Cannot enslave VLAN device into VLAN aware bridge");
1895 return notifier_from_errno(-EINVAL);
1896 }
1897
1898 return NOTIFY_DONE;
1899 }
1900
1901 static int dsa_slave_netdevice_event(struct notifier_block *nb,
1902 unsigned long event, void *ptr)
1903 {
1904 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1905
1906 if (event == NETDEV_CHANGEUPPER) {
1907 if (!dsa_slave_dev_check(dev))
1908 return dsa_slave_upper_vlan_check(dev, ptr);
1909
1910 return dsa_slave_changeupper(dev, ptr);
1911 }
1912
1913 return NOTIFY_DONE;
1914 }
1915
1916 struct dsa_switchdev_event_work {
1917 struct work_struct work;
1918 struct switchdev_notifier_fdb_info fdb_info;
1919 struct net_device *dev;
1920 unsigned long event;
1921 };
1922
1923 static void dsa_slave_switchdev_event_work(struct work_struct *work)
1924 {
1925 struct dsa_switchdev_event_work *switchdev_work =
1926 container_of(work, struct dsa_switchdev_event_work, work);
1927 struct net_device *dev = switchdev_work->dev;
1928 struct switchdev_notifier_fdb_info *fdb_info;
1929 struct dsa_port *dp = dsa_slave_to_port(dev);
1930 int err;
1931
1932 rtnl_lock();
1933 switch (switchdev_work->event) {
1934 case SWITCHDEV_FDB_ADD_TO_DEVICE:
1935 fdb_info = &switchdev_work->fdb_info;
1936 if (!fdb_info->added_by_user)
1937 break;
1938
1939 err = dsa_port_fdb_add(dp, fdb_info->addr, fdb_info->vid);
1940 if (err) {
1941 netdev_dbg(dev, "fdb add failed err=%d\n", err);
1942 break;
1943 }
1944 fdb_info->offloaded = true;
1945 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, dev,
1946 &fdb_info->info, NULL);
1947 break;
1948
1949 case SWITCHDEV_FDB_DEL_TO_DEVICE:
1950 fdb_info = &switchdev_work->fdb_info;
1951 if (!fdb_info->added_by_user)
1952 break;
1953
1954 err = dsa_port_fdb_del(dp, fdb_info->addr, fdb_info->vid);
1955 if (err) {
1956 netdev_dbg(dev, "fdb del failed err=%d\n", err);
1957 dev_close(dev);
1958 }
1959 break;
1960 }
1961 rtnl_unlock();
1962
1963 kfree(switchdev_work->fdb_info.addr);
1964 kfree(switchdev_work);
1965 dev_put(dev);
1966 }
1967
1968 static int
1969 dsa_slave_switchdev_fdb_work_init(struct dsa_switchdev_event_work *
1970 switchdev_work,
1971 const struct switchdev_notifier_fdb_info *
1972 fdb_info)
1973 {
1974 memcpy(&switchdev_work->fdb_info, fdb_info,
1975 sizeof(switchdev_work->fdb_info));
1976 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
1977 if (!switchdev_work->fdb_info.addr)
1978 return -ENOMEM;
1979 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
1980 fdb_info->addr);
1981 return 0;
1982 }
1983
1984 /* Called under rcu_read_lock() */
1985 static int dsa_slave_switchdev_event(struct notifier_block *unused,
1986 unsigned long event, void *ptr)
1987 {
1988 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
1989 struct dsa_switchdev_event_work *switchdev_work;
1990 int err;
1991
1992 if (event == SWITCHDEV_PORT_ATTR_SET) {
1993 err = switchdev_handle_port_attr_set(dev, ptr,
1994 dsa_slave_dev_check,
1995 dsa_slave_port_attr_set);
1996 return notifier_from_errno(err);
1997 }
1998
1999 if (!dsa_slave_dev_check(dev))
2000 return NOTIFY_DONE;
2001
2002 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2003 if (!switchdev_work)
2004 return NOTIFY_BAD;
2005
2006 INIT_WORK(&switchdev_work->work,
2007 dsa_slave_switchdev_event_work);
2008 switchdev_work->dev = dev;
2009 switchdev_work->event = event;
2010
2011 switch (event) {
2012 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2013 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2014 if (dsa_slave_switchdev_fdb_work_init(switchdev_work, ptr))
2015 goto err_fdb_work_init;
2016 dev_hold(dev);
2017 break;
2018 default:
2019 kfree(switchdev_work);
2020 return NOTIFY_DONE;
2021 }
2022
2023 dsa_schedule_work(&switchdev_work->work);
2024 return NOTIFY_OK;
2025
2026 err_fdb_work_init:
2027 kfree(switchdev_work);
2028 return NOTIFY_BAD;
2029 }
2030
2031 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
2032 unsigned long event, void *ptr)
2033 {
2034 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2035 int err;
2036
2037 switch (event) {
2038 case SWITCHDEV_PORT_OBJ_ADD:
2039 err = switchdev_handle_port_obj_add(dev, ptr,
2040 dsa_slave_dev_check,
2041 dsa_slave_port_obj_add);
2042 return notifier_from_errno(err);
2043 case SWITCHDEV_PORT_OBJ_DEL:
2044 err = switchdev_handle_port_obj_del(dev, ptr,
2045 dsa_slave_dev_check,
2046 dsa_slave_port_obj_del);
2047 return notifier_from_errno(err);
2048 case SWITCHDEV_PORT_ATTR_SET:
2049 err = switchdev_handle_port_attr_set(dev, ptr,
2050 dsa_slave_dev_check,
2051 dsa_slave_port_attr_set);
2052 return notifier_from_errno(err);
2053 }
2054
2055 return NOTIFY_DONE;
2056 }
2057
2058 static struct notifier_block dsa_slave_nb __read_mostly = {
2059 .notifier_call = dsa_slave_netdevice_event,
2060 };
2061
2062 static struct notifier_block dsa_slave_switchdev_notifier = {
2063 .notifier_call = dsa_slave_switchdev_event,
2064 };
2065
2066 static struct notifier_block dsa_slave_switchdev_blocking_notifier = {
2067 .notifier_call = dsa_slave_switchdev_blocking_event,
2068 };
2069
2070 int dsa_slave_register_notifier(void)
2071 {
2072 struct notifier_block *nb;
2073 int err;
2074
2075 err = register_netdevice_notifier(&dsa_slave_nb);
2076 if (err)
2077 return err;
2078
2079 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
2080 if (err)
2081 goto err_switchdev_nb;
2082
2083 nb = &dsa_slave_switchdev_blocking_notifier;
2084 err = register_switchdev_blocking_notifier(nb);
2085 if (err)
2086 goto err_switchdev_blocking_nb;
2087
2088 return 0;
2089
2090 err_switchdev_blocking_nb:
2091 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2092 err_switchdev_nb:
2093 unregister_netdevice_notifier(&dsa_slave_nb);
2094 return err;
2095 }
2096
2097 void dsa_slave_unregister_notifier(void)
2098 {
2099 struct notifier_block *nb;
2100 int err;
2101
2102 nb = &dsa_slave_switchdev_blocking_notifier;
2103 err = unregister_switchdev_blocking_notifier(nb);
2104 if (err)
2105 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
2106
2107 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2108 if (err)
2109 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
2110
2111 err = unregister_netdevice_notifier(&dsa_slave_nb);
2112 if (err)
2113 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
2114 }
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