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