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Merge tag 'io_uring-5.7-2020-05-22' of git://git.kernel.dk/linux-block
[thirdparty/linux.git] / net / dsa / slave.c
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 (dp->bridge_dev && !br_vlan_enabled(dp->bridge_dev))
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 (dp->bridge_dev && !br_vlan_enabled(dp->bridge_dev))
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 if (p->netpoll)
449 netpoll_send_skb(p->netpoll, skb);
450 #else
451 BUG();
452 #endif
453 return NETDEV_TX_OK;
454 }
455
456 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
457 struct sk_buff *skb)
458 {
459 struct dsa_switch *ds = p->dp->ds;
460 struct sk_buff *clone;
461 unsigned int type;
462
463 type = ptp_classify_raw(skb);
464 if (type == PTP_CLASS_NONE)
465 return;
466
467 if (!ds->ops->port_txtstamp)
468 return;
469
470 clone = skb_clone_sk(skb);
471 if (!clone)
472 return;
473
474 DSA_SKB_CB(skb)->clone = clone;
475
476 if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type))
477 return;
478
479 kfree_skb(clone);
480 }
481
482 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
483 {
484 /* SKB for netpoll still need to be mangled with the protocol-specific
485 * tag to be successfully transmitted
486 */
487 if (unlikely(netpoll_tx_running(dev)))
488 return dsa_slave_netpoll_send_skb(dev, skb);
489
490 /* Queue the SKB for transmission on the parent interface, but
491 * do not modify its EtherType
492 */
493 skb->dev = dsa_slave_to_master(dev);
494 dev_queue_xmit(skb);
495
496 return NETDEV_TX_OK;
497 }
498 EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
499
500 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
501 {
502 struct dsa_slave_priv *p = netdev_priv(dev);
503 struct pcpu_sw_netstats *s;
504 struct sk_buff *nskb;
505
506 s = this_cpu_ptr(p->stats64);
507 u64_stats_update_begin(&s->syncp);
508 s->tx_packets++;
509 s->tx_bytes += skb->len;
510 u64_stats_update_end(&s->syncp);
511
512 DSA_SKB_CB(skb)->clone = NULL;
513
514 /* Identify PTP protocol packets, clone them, and pass them to the
515 * switch driver
516 */
517 dsa_skb_tx_timestamp(p, skb);
518
519 /* Transmit function may have to reallocate the original SKB,
520 * in which case it must have freed it. Only free it here on error.
521 */
522 nskb = p->xmit(skb, dev);
523 if (!nskb) {
524 kfree_skb(skb);
525 return NETDEV_TX_OK;
526 }
527
528 return dsa_enqueue_skb(nskb, dev);
529 }
530
531 /* ethtool operations *******************************************************/
532
533 static void dsa_slave_get_drvinfo(struct net_device *dev,
534 struct ethtool_drvinfo *drvinfo)
535 {
536 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
537 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
538 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
539 }
540
541 static int dsa_slave_get_regs_len(struct net_device *dev)
542 {
543 struct dsa_port *dp = dsa_slave_to_port(dev);
544 struct dsa_switch *ds = dp->ds;
545
546 if (ds->ops->get_regs_len)
547 return ds->ops->get_regs_len(ds, dp->index);
548
549 return -EOPNOTSUPP;
550 }
551
552 static void
553 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
554 {
555 struct dsa_port *dp = dsa_slave_to_port(dev);
556 struct dsa_switch *ds = dp->ds;
557
558 if (ds->ops->get_regs)
559 ds->ops->get_regs(ds, dp->index, regs, _p);
560 }
561
562 static int dsa_slave_nway_reset(struct net_device *dev)
563 {
564 struct dsa_port *dp = dsa_slave_to_port(dev);
565
566 return phylink_ethtool_nway_reset(dp->pl);
567 }
568
569 static int dsa_slave_get_eeprom_len(struct net_device *dev)
570 {
571 struct dsa_port *dp = dsa_slave_to_port(dev);
572 struct dsa_switch *ds = dp->ds;
573
574 if (ds->cd && ds->cd->eeprom_len)
575 return ds->cd->eeprom_len;
576
577 if (ds->ops->get_eeprom_len)
578 return ds->ops->get_eeprom_len(ds);
579
580 return 0;
581 }
582
583 static int dsa_slave_get_eeprom(struct net_device *dev,
584 struct ethtool_eeprom *eeprom, u8 *data)
585 {
586 struct dsa_port *dp = dsa_slave_to_port(dev);
587 struct dsa_switch *ds = dp->ds;
588
589 if (ds->ops->get_eeprom)
590 return ds->ops->get_eeprom(ds, eeprom, data);
591
592 return -EOPNOTSUPP;
593 }
594
595 static int dsa_slave_set_eeprom(struct net_device *dev,
596 struct ethtool_eeprom *eeprom, u8 *data)
597 {
598 struct dsa_port *dp = dsa_slave_to_port(dev);
599 struct dsa_switch *ds = dp->ds;
600
601 if (ds->ops->set_eeprom)
602 return ds->ops->set_eeprom(ds, eeprom, data);
603
604 return -EOPNOTSUPP;
605 }
606
607 static void dsa_slave_get_strings(struct net_device *dev,
608 uint32_t stringset, uint8_t *data)
609 {
610 struct dsa_port *dp = dsa_slave_to_port(dev);
611 struct dsa_switch *ds = dp->ds;
612
613 if (stringset == ETH_SS_STATS) {
614 int len = ETH_GSTRING_LEN;
615
616 strncpy(data, "tx_packets", len);
617 strncpy(data + len, "tx_bytes", len);
618 strncpy(data + 2 * len, "rx_packets", len);
619 strncpy(data + 3 * len, "rx_bytes", len);
620 if (ds->ops->get_strings)
621 ds->ops->get_strings(ds, dp->index, stringset,
622 data + 4 * len);
623 }
624 }
625
626 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
627 struct ethtool_stats *stats,
628 uint64_t *data)
629 {
630 struct dsa_port *dp = dsa_slave_to_port(dev);
631 struct dsa_slave_priv *p = netdev_priv(dev);
632 struct dsa_switch *ds = dp->ds;
633 struct pcpu_sw_netstats *s;
634 unsigned int start;
635 int i;
636
637 for_each_possible_cpu(i) {
638 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
639
640 s = per_cpu_ptr(p->stats64, i);
641 do {
642 start = u64_stats_fetch_begin_irq(&s->syncp);
643 tx_packets = s->tx_packets;
644 tx_bytes = s->tx_bytes;
645 rx_packets = s->rx_packets;
646 rx_bytes = s->rx_bytes;
647 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
648 data[0] += tx_packets;
649 data[1] += tx_bytes;
650 data[2] += rx_packets;
651 data[3] += rx_bytes;
652 }
653 if (ds->ops->get_ethtool_stats)
654 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
655 }
656
657 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
658 {
659 struct dsa_port *dp = dsa_slave_to_port(dev);
660 struct dsa_switch *ds = dp->ds;
661
662 if (sset == ETH_SS_STATS) {
663 int count;
664
665 count = 4;
666 if (ds->ops->get_sset_count)
667 count += ds->ops->get_sset_count(ds, dp->index, sset);
668
669 return count;
670 }
671
672 return -EOPNOTSUPP;
673 }
674
675 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
676 {
677 struct dsa_port *dp = dsa_slave_to_port(dev);
678 struct dsa_switch *ds = dp->ds;
679
680 phylink_ethtool_get_wol(dp->pl, w);
681
682 if (ds->ops->get_wol)
683 ds->ops->get_wol(ds, dp->index, w);
684 }
685
686 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
687 {
688 struct dsa_port *dp = dsa_slave_to_port(dev);
689 struct dsa_switch *ds = dp->ds;
690 int ret = -EOPNOTSUPP;
691
692 phylink_ethtool_set_wol(dp->pl, w);
693
694 if (ds->ops->set_wol)
695 ret = ds->ops->set_wol(ds, dp->index, w);
696
697 return ret;
698 }
699
700 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
701 {
702 struct dsa_port *dp = dsa_slave_to_port(dev);
703 struct dsa_switch *ds = dp->ds;
704 int ret;
705
706 /* Port's PHY and MAC both need to be EEE capable */
707 if (!dev->phydev || !dp->pl)
708 return -ENODEV;
709
710 if (!ds->ops->set_mac_eee)
711 return -EOPNOTSUPP;
712
713 ret = ds->ops->set_mac_eee(ds, dp->index, e);
714 if (ret)
715 return ret;
716
717 return phylink_ethtool_set_eee(dp->pl, e);
718 }
719
720 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
721 {
722 struct dsa_port *dp = dsa_slave_to_port(dev);
723 struct dsa_switch *ds = dp->ds;
724 int ret;
725
726 /* Port's PHY and MAC both need to be EEE capable */
727 if (!dev->phydev || !dp->pl)
728 return -ENODEV;
729
730 if (!ds->ops->get_mac_eee)
731 return -EOPNOTSUPP;
732
733 ret = ds->ops->get_mac_eee(ds, dp->index, e);
734 if (ret)
735 return ret;
736
737 return phylink_ethtool_get_eee(dp->pl, e);
738 }
739
740 static int dsa_slave_get_link_ksettings(struct net_device *dev,
741 struct ethtool_link_ksettings *cmd)
742 {
743 struct dsa_port *dp = dsa_slave_to_port(dev);
744
745 return phylink_ethtool_ksettings_get(dp->pl, cmd);
746 }
747
748 static int dsa_slave_set_link_ksettings(struct net_device *dev,
749 const struct ethtool_link_ksettings *cmd)
750 {
751 struct dsa_port *dp = dsa_slave_to_port(dev);
752
753 return phylink_ethtool_ksettings_set(dp->pl, cmd);
754 }
755
756 static void dsa_slave_get_pauseparam(struct net_device *dev,
757 struct ethtool_pauseparam *pause)
758 {
759 struct dsa_port *dp = dsa_slave_to_port(dev);
760
761 phylink_ethtool_get_pauseparam(dp->pl, pause);
762 }
763
764 static int dsa_slave_set_pauseparam(struct net_device *dev,
765 struct ethtool_pauseparam *pause)
766 {
767 struct dsa_port *dp = dsa_slave_to_port(dev);
768
769 return phylink_ethtool_set_pauseparam(dp->pl, pause);
770 }
771
772 #ifdef CONFIG_NET_POLL_CONTROLLER
773 static int dsa_slave_netpoll_setup(struct net_device *dev,
774 struct netpoll_info *ni)
775 {
776 struct net_device *master = dsa_slave_to_master(dev);
777 struct dsa_slave_priv *p = netdev_priv(dev);
778 struct netpoll *netpoll;
779 int err = 0;
780
781 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
782 if (!netpoll)
783 return -ENOMEM;
784
785 err = __netpoll_setup(netpoll, master);
786 if (err) {
787 kfree(netpoll);
788 goto out;
789 }
790
791 p->netpoll = netpoll;
792 out:
793 return err;
794 }
795
796 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
797 {
798 struct dsa_slave_priv *p = netdev_priv(dev);
799 struct netpoll *netpoll = p->netpoll;
800
801 if (!netpoll)
802 return;
803
804 p->netpoll = NULL;
805
806 __netpoll_free(netpoll);
807 }
808
809 static void dsa_slave_poll_controller(struct net_device *dev)
810 {
811 }
812 #endif
813
814 static int dsa_slave_get_phys_port_name(struct net_device *dev,
815 char *name, size_t len)
816 {
817 struct dsa_port *dp = dsa_slave_to_port(dev);
818
819 /* For non-legacy ports, devlink is used and it takes
820 * care of the name generation. This ndo implementation
821 * should be removed with legacy support.
822 */
823 if (dp->ds->devlink)
824 return -EOPNOTSUPP;
825
826 if (snprintf(name, len, "p%d", dp->index) >= len)
827 return -EINVAL;
828
829 return 0;
830 }
831
832 static struct dsa_mall_tc_entry *
833 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
834 {
835 struct dsa_slave_priv *p = netdev_priv(dev);
836 struct dsa_mall_tc_entry *mall_tc_entry;
837
838 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
839 if (mall_tc_entry->cookie == cookie)
840 return mall_tc_entry;
841
842 return NULL;
843 }
844
845 static int
846 dsa_slave_add_cls_matchall_mirred(struct net_device *dev,
847 struct tc_cls_matchall_offload *cls,
848 bool ingress)
849 {
850 struct dsa_port *dp = dsa_slave_to_port(dev);
851 struct dsa_slave_priv *p = netdev_priv(dev);
852 struct dsa_mall_mirror_tc_entry *mirror;
853 struct dsa_mall_tc_entry *mall_tc_entry;
854 struct dsa_switch *ds = dp->ds;
855 struct flow_action_entry *act;
856 struct dsa_port *to_dp;
857 int err;
858
859 if (!ds->ops->port_mirror_add)
860 return -EOPNOTSUPP;
861
862 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
863 cls->common.extack))
864 return -EOPNOTSUPP;
865
866 act = &cls->rule->action.entries[0];
867
868 if (!act->dev)
869 return -EINVAL;
870
871 if (!dsa_slave_dev_check(act->dev))
872 return -EOPNOTSUPP;
873
874 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
875 if (!mall_tc_entry)
876 return -ENOMEM;
877
878 mall_tc_entry->cookie = cls->cookie;
879 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
880 mirror = &mall_tc_entry->mirror;
881
882 to_dp = dsa_slave_to_port(act->dev);
883
884 mirror->to_local_port = to_dp->index;
885 mirror->ingress = ingress;
886
887 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
888 if (err) {
889 kfree(mall_tc_entry);
890 return err;
891 }
892
893 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
894
895 return err;
896 }
897
898 static int
899 dsa_slave_add_cls_matchall_police(struct net_device *dev,
900 struct tc_cls_matchall_offload *cls,
901 bool ingress)
902 {
903 struct netlink_ext_ack *extack = cls->common.extack;
904 struct dsa_port *dp = dsa_slave_to_port(dev);
905 struct dsa_slave_priv *p = netdev_priv(dev);
906 struct dsa_mall_policer_tc_entry *policer;
907 struct dsa_mall_tc_entry *mall_tc_entry;
908 struct dsa_switch *ds = dp->ds;
909 struct flow_action_entry *act;
910 int err;
911
912 if (!ds->ops->port_policer_add) {
913 NL_SET_ERR_MSG_MOD(extack,
914 "Policing offload not implemented\n");
915 return -EOPNOTSUPP;
916 }
917
918 if (!ingress) {
919 NL_SET_ERR_MSG_MOD(extack,
920 "Only supported on ingress qdisc\n");
921 return -EOPNOTSUPP;
922 }
923
924 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
925 cls->common.extack))
926 return -EOPNOTSUPP;
927
928 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) {
929 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) {
930 NL_SET_ERR_MSG_MOD(extack,
931 "Only one port policer allowed\n");
932 return -EEXIST;
933 }
934 }
935
936 act = &cls->rule->action.entries[0];
937
938 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
939 if (!mall_tc_entry)
940 return -ENOMEM;
941
942 mall_tc_entry->cookie = cls->cookie;
943 mall_tc_entry->type = DSA_PORT_MALL_POLICER;
944 policer = &mall_tc_entry->policer;
945 policer->rate_bytes_per_sec = act->police.rate_bytes_ps;
946 policer->burst = act->police.burst;
947
948 err = ds->ops->port_policer_add(ds, dp->index, policer);
949 if (err) {
950 kfree(mall_tc_entry);
951 return err;
952 }
953
954 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
955
956 return err;
957 }
958
959 static int dsa_slave_add_cls_matchall(struct net_device *dev,
960 struct tc_cls_matchall_offload *cls,
961 bool ingress)
962 {
963 int err = -EOPNOTSUPP;
964
965 if (cls->common.protocol == htons(ETH_P_ALL) &&
966 flow_offload_has_one_action(&cls->rule->action) &&
967 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED)
968 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress);
969 else if (flow_offload_has_one_action(&cls->rule->action) &&
970 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE)
971 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress);
972
973 return err;
974 }
975
976 static void dsa_slave_del_cls_matchall(struct net_device *dev,
977 struct tc_cls_matchall_offload *cls)
978 {
979 struct dsa_port *dp = dsa_slave_to_port(dev);
980 struct dsa_mall_tc_entry *mall_tc_entry;
981 struct dsa_switch *ds = dp->ds;
982
983 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
984 if (!mall_tc_entry)
985 return;
986
987 list_del(&mall_tc_entry->list);
988
989 switch (mall_tc_entry->type) {
990 case DSA_PORT_MALL_MIRROR:
991 if (ds->ops->port_mirror_del)
992 ds->ops->port_mirror_del(ds, dp->index,
993 &mall_tc_entry->mirror);
994 break;
995 case DSA_PORT_MALL_POLICER:
996 if (ds->ops->port_policer_del)
997 ds->ops->port_policer_del(ds, dp->index);
998 break;
999 default:
1000 WARN_ON(1);
1001 }
1002
1003 kfree(mall_tc_entry);
1004 }
1005
1006 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
1007 struct tc_cls_matchall_offload *cls,
1008 bool ingress)
1009 {
1010 if (cls->common.chain_index)
1011 return -EOPNOTSUPP;
1012
1013 switch (cls->command) {
1014 case TC_CLSMATCHALL_REPLACE:
1015 return dsa_slave_add_cls_matchall(dev, cls, ingress);
1016 case TC_CLSMATCHALL_DESTROY:
1017 dsa_slave_del_cls_matchall(dev, cls);
1018 return 0;
1019 default:
1020 return -EOPNOTSUPP;
1021 }
1022 }
1023
1024 static int dsa_slave_add_cls_flower(struct net_device *dev,
1025 struct flow_cls_offload *cls,
1026 bool ingress)
1027 {
1028 struct dsa_port *dp = dsa_slave_to_port(dev);
1029 struct dsa_switch *ds = dp->ds;
1030 int port = dp->index;
1031
1032 if (!ds->ops->cls_flower_add)
1033 return -EOPNOTSUPP;
1034
1035 return ds->ops->cls_flower_add(ds, port, cls, ingress);
1036 }
1037
1038 static int dsa_slave_del_cls_flower(struct net_device *dev,
1039 struct flow_cls_offload *cls,
1040 bool ingress)
1041 {
1042 struct dsa_port *dp = dsa_slave_to_port(dev);
1043 struct dsa_switch *ds = dp->ds;
1044 int port = dp->index;
1045
1046 if (!ds->ops->cls_flower_del)
1047 return -EOPNOTSUPP;
1048
1049 return ds->ops->cls_flower_del(ds, port, cls, ingress);
1050 }
1051
1052 static int dsa_slave_stats_cls_flower(struct net_device *dev,
1053 struct flow_cls_offload *cls,
1054 bool ingress)
1055 {
1056 struct dsa_port *dp = dsa_slave_to_port(dev);
1057 struct dsa_switch *ds = dp->ds;
1058 int port = dp->index;
1059
1060 if (!ds->ops->cls_flower_stats)
1061 return -EOPNOTSUPP;
1062
1063 return ds->ops->cls_flower_stats(ds, port, cls, ingress);
1064 }
1065
1066 static int dsa_slave_setup_tc_cls_flower(struct net_device *dev,
1067 struct flow_cls_offload *cls,
1068 bool ingress)
1069 {
1070 switch (cls->command) {
1071 case FLOW_CLS_REPLACE:
1072 return dsa_slave_add_cls_flower(dev, cls, ingress);
1073 case FLOW_CLS_DESTROY:
1074 return dsa_slave_del_cls_flower(dev, cls, ingress);
1075 case FLOW_CLS_STATS:
1076 return dsa_slave_stats_cls_flower(dev, cls, ingress);
1077 default:
1078 return -EOPNOTSUPP;
1079 }
1080 }
1081
1082 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
1083 void *cb_priv, bool ingress)
1084 {
1085 struct net_device *dev = cb_priv;
1086
1087 if (!tc_can_offload(dev))
1088 return -EOPNOTSUPP;
1089
1090 switch (type) {
1091 case TC_SETUP_CLSMATCHALL:
1092 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
1093 case TC_SETUP_CLSFLOWER:
1094 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress);
1095 default:
1096 return -EOPNOTSUPP;
1097 }
1098 }
1099
1100 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
1101 void *type_data, void *cb_priv)
1102 {
1103 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
1104 }
1105
1106 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
1107 void *type_data, void *cb_priv)
1108 {
1109 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
1110 }
1111
1112 static LIST_HEAD(dsa_slave_block_cb_list);
1113
1114 static int dsa_slave_setup_tc_block(struct net_device *dev,
1115 struct flow_block_offload *f)
1116 {
1117 struct flow_block_cb *block_cb;
1118 flow_setup_cb_t *cb;
1119
1120 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
1121 cb = dsa_slave_setup_tc_block_cb_ig;
1122 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
1123 cb = dsa_slave_setup_tc_block_cb_eg;
1124 else
1125 return -EOPNOTSUPP;
1126
1127 f->driver_block_list = &dsa_slave_block_cb_list;
1128
1129 switch (f->command) {
1130 case FLOW_BLOCK_BIND:
1131 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list))
1132 return -EBUSY;
1133
1134 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL);
1135 if (IS_ERR(block_cb))
1136 return PTR_ERR(block_cb);
1137
1138 flow_block_cb_add(block_cb, f);
1139 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list);
1140 return 0;
1141 case FLOW_BLOCK_UNBIND:
1142 block_cb = flow_block_cb_lookup(f->block, cb, dev);
1143 if (!block_cb)
1144 return -ENOENT;
1145
1146 flow_block_cb_remove(block_cb, f);
1147 list_del(&block_cb->driver_list);
1148 return 0;
1149 default:
1150 return -EOPNOTSUPP;
1151 }
1152 }
1153
1154 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
1155 void *type_data)
1156 {
1157 struct dsa_port *dp = dsa_slave_to_port(dev);
1158 struct dsa_switch *ds = dp->ds;
1159
1160 if (type == TC_SETUP_BLOCK)
1161 return dsa_slave_setup_tc_block(dev, type_data);
1162
1163 if (!ds->ops->port_setup_tc)
1164 return -EOPNOTSUPP;
1165
1166 return ds->ops->port_setup_tc(ds, dp->index, type, type_data);
1167 }
1168
1169 static void dsa_slave_get_stats64(struct net_device *dev,
1170 struct rtnl_link_stats64 *stats)
1171 {
1172 struct dsa_slave_priv *p = netdev_priv(dev);
1173 struct pcpu_sw_netstats *s;
1174 unsigned int start;
1175 int i;
1176
1177 netdev_stats_to_stats64(stats, &dev->stats);
1178 for_each_possible_cpu(i) {
1179 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
1180
1181 s = per_cpu_ptr(p->stats64, i);
1182 do {
1183 start = u64_stats_fetch_begin_irq(&s->syncp);
1184 tx_packets = s->tx_packets;
1185 tx_bytes = s->tx_bytes;
1186 rx_packets = s->rx_packets;
1187 rx_bytes = s->rx_bytes;
1188 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
1189
1190 stats->tx_packets += tx_packets;
1191 stats->tx_bytes += tx_bytes;
1192 stats->rx_packets += rx_packets;
1193 stats->rx_bytes += rx_bytes;
1194 }
1195 }
1196
1197 static int dsa_slave_get_rxnfc(struct net_device *dev,
1198 struct ethtool_rxnfc *nfc, u32 *rule_locs)
1199 {
1200 struct dsa_port *dp = dsa_slave_to_port(dev);
1201 struct dsa_switch *ds = dp->ds;
1202
1203 if (!ds->ops->get_rxnfc)
1204 return -EOPNOTSUPP;
1205
1206 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
1207 }
1208
1209 static int dsa_slave_set_rxnfc(struct net_device *dev,
1210 struct ethtool_rxnfc *nfc)
1211 {
1212 struct dsa_port *dp = dsa_slave_to_port(dev);
1213 struct dsa_switch *ds = dp->ds;
1214
1215 if (!ds->ops->set_rxnfc)
1216 return -EOPNOTSUPP;
1217
1218 return ds->ops->set_rxnfc(ds, dp->index, nfc);
1219 }
1220
1221 static int dsa_slave_get_ts_info(struct net_device *dev,
1222 struct ethtool_ts_info *ts)
1223 {
1224 struct dsa_slave_priv *p = netdev_priv(dev);
1225 struct dsa_switch *ds = p->dp->ds;
1226
1227 if (!ds->ops->get_ts_info)
1228 return -EOPNOTSUPP;
1229
1230 return ds->ops->get_ts_info(ds, p->dp->index, ts);
1231 }
1232
1233 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
1234 u16 vid)
1235 {
1236 struct dsa_port *dp = dsa_slave_to_port(dev);
1237 struct bridge_vlan_info info;
1238 int ret;
1239
1240 /* Check for a possible bridge VLAN entry now since there is no
1241 * need to emulate the switchdev prepare + commit phase.
1242 */
1243 if (dp->bridge_dev) {
1244 if (!br_vlan_enabled(dp->bridge_dev))
1245 return 0;
1246
1247 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
1248 * device, respectively the VID is not found, returning
1249 * 0 means success, which is a failure for us here.
1250 */
1251 ret = br_vlan_get_info(dp->bridge_dev, vid, &info);
1252 if (ret == 0)
1253 return -EBUSY;
1254 }
1255
1256 ret = dsa_port_vid_add(dp, vid, 0);
1257 if (ret)
1258 return ret;
1259
1260 ret = dsa_port_vid_add(dp->cpu_dp, vid, 0);
1261 if (ret)
1262 return ret;
1263
1264 return 0;
1265 }
1266
1267 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
1268 u16 vid)
1269 {
1270 struct dsa_port *dp = dsa_slave_to_port(dev);
1271 struct bridge_vlan_info info;
1272 int ret;
1273
1274 /* Check for a possible bridge VLAN entry now since there is no
1275 * need to emulate the switchdev prepare + commit phase.
1276 */
1277 if (dp->bridge_dev) {
1278 if (!br_vlan_enabled(dp->bridge_dev))
1279 return 0;
1280
1281 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
1282 * device, respectively the VID is not found, returning
1283 * 0 means success, which is a failure for us here.
1284 */
1285 ret = br_vlan_get_info(dp->bridge_dev, vid, &info);
1286 if (ret == 0)
1287 return -EBUSY;
1288 }
1289
1290 /* Do not deprogram the CPU port as it may be shared with other user
1291 * ports which can be members of this VLAN as well.
1292 */
1293 return dsa_port_vid_del(dp, vid);
1294 }
1295
1296 struct dsa_hw_port {
1297 struct list_head list;
1298 struct net_device *dev;
1299 int old_mtu;
1300 };
1301
1302 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu)
1303 {
1304 const struct dsa_hw_port *p;
1305 int err;
1306
1307 list_for_each_entry(p, hw_port_list, list) {
1308 if (p->dev->mtu == mtu)
1309 continue;
1310
1311 err = dev_set_mtu(p->dev, mtu);
1312 if (err)
1313 goto rollback;
1314 }
1315
1316 return 0;
1317
1318 rollback:
1319 list_for_each_entry_continue_reverse(p, hw_port_list, list) {
1320 if (p->dev->mtu == p->old_mtu)
1321 continue;
1322
1323 if (dev_set_mtu(p->dev, p->old_mtu))
1324 netdev_err(p->dev, "Failed to restore MTU\n");
1325 }
1326
1327 return err;
1328 }
1329
1330 static void dsa_hw_port_list_free(struct list_head *hw_port_list)
1331 {
1332 struct dsa_hw_port *p, *n;
1333
1334 list_for_each_entry_safe(p, n, hw_port_list, list)
1335 kfree(p);
1336 }
1337
1338 /* Make the hardware datapath to/from @dev limited to a common MTU */
1339 static void dsa_bridge_mtu_normalization(struct dsa_port *dp)
1340 {
1341 struct list_head hw_port_list;
1342 struct dsa_switch_tree *dst;
1343 int min_mtu = ETH_MAX_MTU;
1344 struct dsa_port *other_dp;
1345 int err;
1346
1347 if (!dp->ds->mtu_enforcement_ingress)
1348 return;
1349
1350 if (!dp->bridge_dev)
1351 return;
1352
1353 INIT_LIST_HEAD(&hw_port_list);
1354
1355 /* Populate the list of ports that are part of the same bridge
1356 * as the newly added/modified port
1357 */
1358 list_for_each_entry(dst, &dsa_tree_list, list) {
1359 list_for_each_entry(other_dp, &dst->ports, list) {
1360 struct dsa_hw_port *hw_port;
1361 struct net_device *slave;
1362
1363 if (other_dp->type != DSA_PORT_TYPE_USER)
1364 continue;
1365
1366 if (other_dp->bridge_dev != dp->bridge_dev)
1367 continue;
1368
1369 if (!other_dp->ds->mtu_enforcement_ingress)
1370 continue;
1371
1372 slave = other_dp->slave;
1373
1374 if (min_mtu > slave->mtu)
1375 min_mtu = slave->mtu;
1376
1377 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL);
1378 if (!hw_port)
1379 goto out;
1380
1381 hw_port->dev = slave;
1382 hw_port->old_mtu = slave->mtu;
1383
1384 list_add(&hw_port->list, &hw_port_list);
1385 }
1386 }
1387
1388 /* Attempt to configure the entire hardware bridge to the newly added
1389 * interface's MTU first, regardless of whether the intention of the
1390 * user was to raise or lower it.
1391 */
1392 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu);
1393 if (!err)
1394 goto out;
1395
1396 /* Clearly that didn't work out so well, so just set the minimum MTU on
1397 * all hardware bridge ports now. If this fails too, then all ports will
1398 * still have their old MTU rolled back anyway.
1399 */
1400 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu);
1401
1402 out:
1403 dsa_hw_port_list_free(&hw_port_list);
1404 }
1405
1406 static int dsa_slave_change_mtu(struct net_device *dev, int new_mtu)
1407 {
1408 struct net_device *master = dsa_slave_to_master(dev);
1409 struct dsa_port *dp = dsa_slave_to_port(dev);
1410 struct dsa_slave_priv *p = netdev_priv(dev);
1411 struct dsa_switch *ds = p->dp->ds;
1412 struct dsa_port *cpu_dp;
1413 int port = p->dp->index;
1414 int largest_mtu = 0;
1415 int new_master_mtu;
1416 int old_master_mtu;
1417 int mtu_limit;
1418 int cpu_mtu;
1419 int err, i;
1420
1421 if (!ds->ops->port_change_mtu)
1422 return -EOPNOTSUPP;
1423
1424 for (i = 0; i < ds->num_ports; i++) {
1425 int slave_mtu;
1426
1427 if (!dsa_is_user_port(ds, i))
1428 continue;
1429
1430 /* During probe, this function will be called for each slave
1431 * device, while not all of them have been allocated. That's
1432 * ok, it doesn't change what the maximum is, so ignore it.
1433 */
1434 if (!dsa_to_port(ds, i)->slave)
1435 continue;
1436
1437 /* Pretend that we already applied the setting, which we
1438 * actually haven't (still haven't done all integrity checks)
1439 */
1440 if (i == port)
1441 slave_mtu = new_mtu;
1442 else
1443 slave_mtu = dsa_to_port(ds, i)->slave->mtu;
1444
1445 if (largest_mtu < slave_mtu)
1446 largest_mtu = slave_mtu;
1447 }
1448
1449 cpu_dp = dsa_to_port(ds, port)->cpu_dp;
1450
1451 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu);
1452 old_master_mtu = master->mtu;
1453 new_master_mtu = largest_mtu + cpu_dp->tag_ops->overhead;
1454 if (new_master_mtu > mtu_limit)
1455 return -ERANGE;
1456
1457 /* If the master MTU isn't over limit, there's no need to check the CPU
1458 * MTU, since that surely isn't either.
1459 */
1460 cpu_mtu = largest_mtu;
1461
1462 /* Start applying stuff */
1463 if (new_master_mtu != old_master_mtu) {
1464 err = dev_set_mtu(master, new_master_mtu);
1465 if (err < 0)
1466 goto out_master_failed;
1467
1468 /* We only need to propagate the MTU of the CPU port to
1469 * upstream switches.
1470 */
1471 err = dsa_port_mtu_change(cpu_dp, cpu_mtu, true);
1472 if (err)
1473 goto out_cpu_failed;
1474 }
1475
1476 err = dsa_port_mtu_change(dp, new_mtu, false);
1477 if (err)
1478 goto out_port_failed;
1479
1480 dev->mtu = new_mtu;
1481
1482 dsa_bridge_mtu_normalization(dp);
1483
1484 return 0;
1485
1486 out_port_failed:
1487 if (new_master_mtu != old_master_mtu)
1488 dsa_port_mtu_change(cpu_dp, old_master_mtu -
1489 cpu_dp->tag_ops->overhead,
1490 true);
1491 out_cpu_failed:
1492 if (new_master_mtu != old_master_mtu)
1493 dev_set_mtu(master, old_master_mtu);
1494 out_master_failed:
1495 return err;
1496 }
1497
1498 static const struct ethtool_ops dsa_slave_ethtool_ops = {
1499 .get_drvinfo = dsa_slave_get_drvinfo,
1500 .get_regs_len = dsa_slave_get_regs_len,
1501 .get_regs = dsa_slave_get_regs,
1502 .nway_reset = dsa_slave_nway_reset,
1503 .get_link = ethtool_op_get_link,
1504 .get_eeprom_len = dsa_slave_get_eeprom_len,
1505 .get_eeprom = dsa_slave_get_eeprom,
1506 .set_eeprom = dsa_slave_set_eeprom,
1507 .get_strings = dsa_slave_get_strings,
1508 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
1509 .get_sset_count = dsa_slave_get_sset_count,
1510 .set_wol = dsa_slave_set_wol,
1511 .get_wol = dsa_slave_get_wol,
1512 .set_eee = dsa_slave_set_eee,
1513 .get_eee = dsa_slave_get_eee,
1514 .get_link_ksettings = dsa_slave_get_link_ksettings,
1515 .set_link_ksettings = dsa_slave_set_link_ksettings,
1516 .get_pauseparam = dsa_slave_get_pauseparam,
1517 .set_pauseparam = dsa_slave_set_pauseparam,
1518 .get_rxnfc = dsa_slave_get_rxnfc,
1519 .set_rxnfc = dsa_slave_set_rxnfc,
1520 .get_ts_info = dsa_slave_get_ts_info,
1521 };
1522
1523 /* legacy way, bypassing the bridge *****************************************/
1524 int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
1525 struct net_device *dev,
1526 const unsigned char *addr, u16 vid,
1527 u16 flags,
1528 struct netlink_ext_ack *extack)
1529 {
1530 struct dsa_port *dp = dsa_slave_to_port(dev);
1531
1532 return dsa_port_fdb_add(dp, addr, vid);
1533 }
1534
1535 int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
1536 struct net_device *dev,
1537 const unsigned char *addr, u16 vid)
1538 {
1539 struct dsa_port *dp = dsa_slave_to_port(dev);
1540
1541 return dsa_port_fdb_del(dp, addr, vid);
1542 }
1543
1544 static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
1545 {
1546 struct dsa_port *dp = dsa_slave_to_port(dev);
1547
1548 return dp->ds->devlink ? &dp->devlink_port : NULL;
1549 }
1550
1551 static const struct net_device_ops dsa_slave_netdev_ops = {
1552 .ndo_open = dsa_slave_open,
1553 .ndo_stop = dsa_slave_close,
1554 .ndo_start_xmit = dsa_slave_xmit,
1555 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
1556 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
1557 .ndo_set_mac_address = dsa_slave_set_mac_address,
1558 .ndo_fdb_add = dsa_legacy_fdb_add,
1559 .ndo_fdb_del = dsa_legacy_fdb_del,
1560 .ndo_fdb_dump = dsa_slave_fdb_dump,
1561 .ndo_do_ioctl = dsa_slave_ioctl,
1562 .ndo_get_iflink = dsa_slave_get_iflink,
1563 #ifdef CONFIG_NET_POLL_CONTROLLER
1564 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
1565 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
1566 .ndo_poll_controller = dsa_slave_poll_controller,
1567 #endif
1568 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
1569 .ndo_setup_tc = dsa_slave_setup_tc,
1570 .ndo_get_stats64 = dsa_slave_get_stats64,
1571 .ndo_get_port_parent_id = dsa_slave_get_port_parent_id,
1572 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
1573 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
1574 .ndo_get_devlink_port = dsa_slave_get_devlink_port,
1575 .ndo_change_mtu = dsa_slave_change_mtu,
1576 };
1577
1578 static struct device_type dsa_type = {
1579 .name = "dsa",
1580 };
1581
1582 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
1583 {
1584 const struct dsa_port *dp = dsa_to_port(ds, port);
1585
1586 if (dp->pl)
1587 phylink_mac_change(dp->pl, up);
1588 }
1589 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
1590
1591 static void dsa_slave_phylink_fixed_state(struct net_device *dev,
1592 struct phylink_link_state *state)
1593 {
1594 struct dsa_port *dp = dsa_slave_to_port(dev);
1595 struct dsa_switch *ds = dp->ds;
1596
1597 /* No need to check that this operation is valid, the callback would
1598 * not be called if it was not.
1599 */
1600 ds->ops->phylink_fixed_state(ds, dp->index, state);
1601 }
1602
1603 /* slave device setup *******************************************************/
1604 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
1605 {
1606 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1607 struct dsa_switch *ds = dp->ds;
1608
1609 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
1610 if (!slave_dev->phydev) {
1611 netdev_err(slave_dev, "no phy at %d\n", addr);
1612 return -ENODEV;
1613 }
1614
1615 return phylink_connect_phy(dp->pl, slave_dev->phydev);
1616 }
1617
1618 static int dsa_slave_phy_setup(struct net_device *slave_dev)
1619 {
1620 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1621 struct device_node *port_dn = dp->dn;
1622 struct dsa_switch *ds = dp->ds;
1623 phy_interface_t mode;
1624 u32 phy_flags = 0;
1625 int ret;
1626
1627 ret = of_get_phy_mode(port_dn, &mode);
1628 if (ret)
1629 mode = PHY_INTERFACE_MODE_NA;
1630
1631 dp->pl_config.dev = &slave_dev->dev;
1632 dp->pl_config.type = PHYLINK_NETDEV;
1633
1634 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode,
1635 &dsa_port_phylink_mac_ops);
1636 if (IS_ERR(dp->pl)) {
1637 netdev_err(slave_dev,
1638 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1639 return PTR_ERR(dp->pl);
1640 }
1641
1642 /* Register only if the switch provides such a callback, since this
1643 * callback takes precedence over polling the link GPIO in PHYLINK
1644 * (see phylink_get_fixed_state).
1645 */
1646 if (ds->ops->phylink_fixed_state)
1647 phylink_fixed_state_cb(dp->pl, dsa_slave_phylink_fixed_state);
1648
1649 if (ds->ops->get_phy_flags)
1650 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
1651
1652 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
1653 if (ret == -ENODEV && ds->slave_mii_bus) {
1654 /* We could not connect to a designated PHY or SFP, so try to
1655 * use the switch internal MDIO bus instead
1656 */
1657 ret = dsa_slave_phy_connect(slave_dev, dp->index);
1658 if (ret) {
1659 netdev_err(slave_dev,
1660 "failed to connect to port %d: %d\n",
1661 dp->index, ret);
1662 phylink_destroy(dp->pl);
1663 return ret;
1664 }
1665 }
1666
1667 return ret;
1668 }
1669
1670 int dsa_slave_suspend(struct net_device *slave_dev)
1671 {
1672 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1673
1674 if (!netif_running(slave_dev))
1675 return 0;
1676
1677 netif_device_detach(slave_dev);
1678
1679 rtnl_lock();
1680 phylink_stop(dp->pl);
1681 rtnl_unlock();
1682
1683 return 0;
1684 }
1685
1686 int dsa_slave_resume(struct net_device *slave_dev)
1687 {
1688 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1689
1690 if (!netif_running(slave_dev))
1691 return 0;
1692
1693 netif_device_attach(slave_dev);
1694
1695 rtnl_lock();
1696 phylink_start(dp->pl);
1697 rtnl_unlock();
1698
1699 return 0;
1700 }
1701
1702 static void dsa_slave_notify(struct net_device *dev, unsigned long val)
1703 {
1704 struct net_device *master = dsa_slave_to_master(dev);
1705 struct dsa_port *dp = dsa_slave_to_port(dev);
1706 struct dsa_notifier_register_info rinfo = {
1707 .switch_number = dp->ds->index,
1708 .port_number = dp->index,
1709 .master = master,
1710 .info.dev = dev,
1711 };
1712
1713 call_dsa_notifiers(val, dev, &rinfo.info);
1714 }
1715
1716 int dsa_slave_create(struct dsa_port *port)
1717 {
1718 const struct dsa_port *cpu_dp = port->cpu_dp;
1719 struct net_device *master = cpu_dp->master;
1720 struct dsa_switch *ds = port->ds;
1721 const char *name = port->name;
1722 struct net_device *slave_dev;
1723 struct dsa_slave_priv *p;
1724 int ret;
1725
1726 if (!ds->num_tx_queues)
1727 ds->num_tx_queues = 1;
1728
1729 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
1730 NET_NAME_UNKNOWN, ether_setup,
1731 ds->num_tx_queues, 1);
1732 if (slave_dev == NULL)
1733 return -ENOMEM;
1734
1735 slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
1736 if (ds->ops->port_vlan_add && ds->ops->port_vlan_del)
1737 slave_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1738 slave_dev->hw_features |= NETIF_F_HW_TC;
1739 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1740 if (!IS_ERR_OR_NULL(port->mac))
1741 ether_addr_copy(slave_dev->dev_addr, port->mac);
1742 else
1743 eth_hw_addr_inherit(slave_dev, master);
1744 slave_dev->priv_flags |= IFF_NO_QUEUE;
1745 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1746 slave_dev->min_mtu = 0;
1747 if (ds->ops->port_max_mtu)
1748 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index);
1749 else
1750 slave_dev->max_mtu = ETH_MAX_MTU;
1751 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1752
1753 SET_NETDEV_DEV(slave_dev, port->ds->dev);
1754 slave_dev->dev.of_node = port->dn;
1755 slave_dev->vlan_features = master->vlan_features;
1756
1757 p = netdev_priv(slave_dev);
1758 p->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1759 if (!p->stats64) {
1760 free_netdev(slave_dev);
1761 return -ENOMEM;
1762 }
1763 p->dp = port;
1764 INIT_LIST_HEAD(&p->mall_tc_list);
1765 p->xmit = cpu_dp->tag_ops->xmit;
1766 port->slave = slave_dev;
1767
1768 rtnl_lock();
1769 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN);
1770 rtnl_unlock();
1771 if (ret)
1772 dev_warn(ds->dev, "nonfatal error %d setting MTU on port %d\n",
1773 ret, port->index);
1774
1775 netif_carrier_off(slave_dev);
1776
1777 ret = dsa_slave_phy_setup(slave_dev);
1778 if (ret) {
1779 netdev_err(master, "error %d setting up slave phy\n", ret);
1780 goto out_free;
1781 }
1782
1783 dsa_slave_notify(slave_dev, DSA_PORT_REGISTER);
1784
1785 ret = register_netdev(slave_dev);
1786 if (ret) {
1787 netdev_err(master, "error %d registering interface %s\n",
1788 ret, slave_dev->name);
1789 goto out_phy;
1790 }
1791
1792 return 0;
1793
1794 out_phy:
1795 rtnl_lock();
1796 phylink_disconnect_phy(p->dp->pl);
1797 rtnl_unlock();
1798 phylink_destroy(p->dp->pl);
1799 out_free:
1800 free_percpu(p->stats64);
1801 free_netdev(slave_dev);
1802 port->slave = NULL;
1803 return ret;
1804 }
1805
1806 void dsa_slave_destroy(struct net_device *slave_dev)
1807 {
1808 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1809 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1810
1811 netif_carrier_off(slave_dev);
1812 rtnl_lock();
1813 phylink_disconnect_phy(dp->pl);
1814 rtnl_unlock();
1815
1816 dsa_slave_notify(slave_dev, DSA_PORT_UNREGISTER);
1817 unregister_netdev(slave_dev);
1818 phylink_destroy(dp->pl);
1819 free_percpu(p->stats64);
1820 free_netdev(slave_dev);
1821 }
1822
1823 bool dsa_slave_dev_check(const struct net_device *dev)
1824 {
1825 return dev->netdev_ops == &dsa_slave_netdev_ops;
1826 }
1827
1828 static int dsa_slave_changeupper(struct net_device *dev,
1829 struct netdev_notifier_changeupper_info *info)
1830 {
1831 struct dsa_port *dp = dsa_slave_to_port(dev);
1832 int err = NOTIFY_DONE;
1833
1834 if (netif_is_bridge_master(info->upper_dev)) {
1835 if (info->linking) {
1836 err = dsa_port_bridge_join(dp, info->upper_dev);
1837 if (!err)
1838 dsa_bridge_mtu_normalization(dp);
1839 err = notifier_from_errno(err);
1840 } else {
1841 dsa_port_bridge_leave(dp, info->upper_dev);
1842 err = NOTIFY_OK;
1843 }
1844 }
1845
1846 return err;
1847 }
1848
1849 static int dsa_slave_upper_vlan_check(struct net_device *dev,
1850 struct netdev_notifier_changeupper_info *
1851 info)
1852 {
1853 struct netlink_ext_ack *ext_ack;
1854 struct net_device *slave;
1855 struct dsa_port *dp;
1856
1857 ext_ack = netdev_notifier_info_to_extack(&info->info);
1858
1859 if (!is_vlan_dev(dev))
1860 return NOTIFY_DONE;
1861
1862 slave = vlan_dev_real_dev(dev);
1863 if (!dsa_slave_dev_check(slave))
1864 return NOTIFY_DONE;
1865
1866 dp = dsa_slave_to_port(slave);
1867 if (!dp->bridge_dev)
1868 return NOTIFY_DONE;
1869
1870 /* Deny enslaving a VLAN device into a VLAN-aware bridge */
1871 if (br_vlan_enabled(dp->bridge_dev) &&
1872 netif_is_bridge_master(info->upper_dev) && info->linking) {
1873 NL_SET_ERR_MSG_MOD(ext_ack,
1874 "Cannot enslave VLAN device into VLAN aware bridge");
1875 return notifier_from_errno(-EINVAL);
1876 }
1877
1878 return NOTIFY_DONE;
1879 }
1880
1881 static int dsa_slave_netdevice_event(struct notifier_block *nb,
1882 unsigned long event, void *ptr)
1883 {
1884 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1885
1886 if (event == NETDEV_CHANGEUPPER) {
1887 if (!dsa_slave_dev_check(dev))
1888 return dsa_slave_upper_vlan_check(dev, ptr);
1889
1890 return dsa_slave_changeupper(dev, ptr);
1891 }
1892
1893 return NOTIFY_DONE;
1894 }
1895
1896 struct dsa_switchdev_event_work {
1897 struct work_struct work;
1898 struct switchdev_notifier_fdb_info fdb_info;
1899 struct net_device *dev;
1900 unsigned long event;
1901 };
1902
1903 static void dsa_slave_switchdev_event_work(struct work_struct *work)
1904 {
1905 struct dsa_switchdev_event_work *switchdev_work =
1906 container_of(work, struct dsa_switchdev_event_work, work);
1907 struct net_device *dev = switchdev_work->dev;
1908 struct switchdev_notifier_fdb_info *fdb_info;
1909 struct dsa_port *dp = dsa_slave_to_port(dev);
1910 int err;
1911
1912 rtnl_lock();
1913 switch (switchdev_work->event) {
1914 case SWITCHDEV_FDB_ADD_TO_DEVICE:
1915 fdb_info = &switchdev_work->fdb_info;
1916 if (!fdb_info->added_by_user)
1917 break;
1918
1919 err = dsa_port_fdb_add(dp, fdb_info->addr, fdb_info->vid);
1920 if (err) {
1921 netdev_dbg(dev, "fdb add failed err=%d\n", err);
1922 break;
1923 }
1924 fdb_info->offloaded = true;
1925 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, dev,
1926 &fdb_info->info, NULL);
1927 break;
1928
1929 case SWITCHDEV_FDB_DEL_TO_DEVICE:
1930 fdb_info = &switchdev_work->fdb_info;
1931 if (!fdb_info->added_by_user)
1932 break;
1933
1934 err = dsa_port_fdb_del(dp, fdb_info->addr, fdb_info->vid);
1935 if (err) {
1936 netdev_dbg(dev, "fdb del failed err=%d\n", err);
1937 dev_close(dev);
1938 }
1939 break;
1940 }
1941 rtnl_unlock();
1942
1943 kfree(switchdev_work->fdb_info.addr);
1944 kfree(switchdev_work);
1945 dev_put(dev);
1946 }
1947
1948 static int
1949 dsa_slave_switchdev_fdb_work_init(struct dsa_switchdev_event_work *
1950 switchdev_work,
1951 const struct switchdev_notifier_fdb_info *
1952 fdb_info)
1953 {
1954 memcpy(&switchdev_work->fdb_info, fdb_info,
1955 sizeof(switchdev_work->fdb_info));
1956 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
1957 if (!switchdev_work->fdb_info.addr)
1958 return -ENOMEM;
1959 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
1960 fdb_info->addr);
1961 return 0;
1962 }
1963
1964 /* Called under rcu_read_lock() */
1965 static int dsa_slave_switchdev_event(struct notifier_block *unused,
1966 unsigned long event, void *ptr)
1967 {
1968 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
1969 struct dsa_switchdev_event_work *switchdev_work;
1970 int err;
1971
1972 if (event == SWITCHDEV_PORT_ATTR_SET) {
1973 err = switchdev_handle_port_attr_set(dev, ptr,
1974 dsa_slave_dev_check,
1975 dsa_slave_port_attr_set);
1976 return notifier_from_errno(err);
1977 }
1978
1979 if (!dsa_slave_dev_check(dev))
1980 return NOTIFY_DONE;
1981
1982 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
1983 if (!switchdev_work)
1984 return NOTIFY_BAD;
1985
1986 INIT_WORK(&switchdev_work->work,
1987 dsa_slave_switchdev_event_work);
1988 switchdev_work->dev = dev;
1989 switchdev_work->event = event;
1990
1991 switch (event) {
1992 case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */
1993 case SWITCHDEV_FDB_DEL_TO_DEVICE:
1994 if (dsa_slave_switchdev_fdb_work_init(switchdev_work, ptr))
1995 goto err_fdb_work_init;
1996 dev_hold(dev);
1997 break;
1998 default:
1999 kfree(switchdev_work);
2000 return NOTIFY_DONE;
2001 }
2002
2003 dsa_schedule_work(&switchdev_work->work);
2004 return NOTIFY_OK;
2005
2006 err_fdb_work_init:
2007 kfree(switchdev_work);
2008 return NOTIFY_BAD;
2009 }
2010
2011 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
2012 unsigned long event, void *ptr)
2013 {
2014 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2015 int err;
2016
2017 switch (event) {
2018 case SWITCHDEV_PORT_OBJ_ADD:
2019 err = switchdev_handle_port_obj_add(dev, ptr,
2020 dsa_slave_dev_check,
2021 dsa_slave_port_obj_add);
2022 return notifier_from_errno(err);
2023 case SWITCHDEV_PORT_OBJ_DEL:
2024 err = switchdev_handle_port_obj_del(dev, ptr,
2025 dsa_slave_dev_check,
2026 dsa_slave_port_obj_del);
2027 return notifier_from_errno(err);
2028 case SWITCHDEV_PORT_ATTR_SET:
2029 err = switchdev_handle_port_attr_set(dev, ptr,
2030 dsa_slave_dev_check,
2031 dsa_slave_port_attr_set);
2032 return notifier_from_errno(err);
2033 }
2034
2035 return NOTIFY_DONE;
2036 }
2037
2038 static struct notifier_block dsa_slave_nb __read_mostly = {
2039 .notifier_call = dsa_slave_netdevice_event,
2040 };
2041
2042 static struct notifier_block dsa_slave_switchdev_notifier = {
2043 .notifier_call = dsa_slave_switchdev_event,
2044 };
2045
2046 static struct notifier_block dsa_slave_switchdev_blocking_notifier = {
2047 .notifier_call = dsa_slave_switchdev_blocking_event,
2048 };
2049
2050 int dsa_slave_register_notifier(void)
2051 {
2052 struct notifier_block *nb;
2053 int err;
2054
2055 err = register_netdevice_notifier(&dsa_slave_nb);
2056 if (err)
2057 return err;
2058
2059 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
2060 if (err)
2061 goto err_switchdev_nb;
2062
2063 nb = &dsa_slave_switchdev_blocking_notifier;
2064 err = register_switchdev_blocking_notifier(nb);
2065 if (err)
2066 goto err_switchdev_blocking_nb;
2067
2068 return 0;
2069
2070 err_switchdev_blocking_nb:
2071 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2072 err_switchdev_nb:
2073 unregister_netdevice_notifier(&dsa_slave_nb);
2074 return err;
2075 }
2076
2077 void dsa_slave_unregister_notifier(void)
2078 {
2079 struct notifier_block *nb;
2080 int err;
2081
2082 nb = &dsa_slave_switchdev_blocking_notifier;
2083 err = unregister_switchdev_blocking_notifier(nb);
2084 if (err)
2085 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
2086
2087 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2088 if (err)
2089 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
2090
2091 err = unregister_netdevice_notifier(&dsa_slave_nb);
2092 if (err)
2093 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
2094 }
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