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ARM: dma-api: fix max_pfn off-by-one error in __dma_supported()
[linux/fpc-iii.git] / net / dsa / slave.c
blob088c886e609ee78d15aa139aad469471b833e057
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(dp, dev->phydev);
92 if (err)
93 goto clear_promisc;
94
95 phylink_start(dp->pl);
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 phylink_stop(dp->pl);
118
119 dsa_port_disable(dp);
120
121 dev_mc_unsync(master, dev);
122 dev_uc_unsync(master, dev);
123 if (dev->flags & IFF_ALLMULTI)
124 dev_set_allmulti(master, -1);
125 if (dev->flags & IFF_PROMISC)
126 dev_set_promiscuity(master, -1);
127
128 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
129 dev_uc_del(master, dev->dev_addr);
130
131 return 0;
132 }
133
134 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
135 {
136 struct net_device *master = dsa_slave_to_master(dev);
137 if (dev->flags & IFF_UP) {
138 if (change & IFF_ALLMULTI)
139 dev_set_allmulti(master,
140 dev->flags & IFF_ALLMULTI ? 1 : -1);
141 if (change & IFF_PROMISC)
142 dev_set_promiscuity(master,
143 dev->flags & IFF_PROMISC ? 1 : -1);
144 }
145 }
146
147 static void dsa_slave_set_rx_mode(struct net_device *dev)
148 {
149 struct net_device *master = dsa_slave_to_master(dev);
150
151 dev_mc_sync(master, dev);
152 dev_uc_sync(master, dev);
153 }
154
155 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
156 {
157 struct net_device *master = dsa_slave_to_master(dev);
158 struct sockaddr *addr = a;
159 int err;
160
161 if (!is_valid_ether_addr(addr->sa_data))
162 return -EADDRNOTAVAIL;
163
164 if (!(dev->flags & IFF_UP))
165 goto out;
166
167 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
168 err = dev_uc_add(master, addr->sa_data);
169 if (err < 0)
170 return err;
171 }
172
173 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
174 dev_uc_del(master, dev->dev_addr);
175
176 out:
177 ether_addr_copy(dev->dev_addr, addr->sa_data);
178
179 return 0;
180 }
181
182 struct dsa_slave_dump_ctx {
183 struct net_device *dev;
184 struct sk_buff *skb;
185 struct netlink_callback *cb;
186 int idx;
187 };
188
189 static int
190 dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid,
191 bool is_static, void *data)
192 {
193 struct dsa_slave_dump_ctx *dump = data;
194 u32 portid = NETLINK_CB(dump->cb->skb).portid;
195 u32 seq = dump->cb->nlh->nlmsg_seq;
196 struct nlmsghdr *nlh;
197 struct ndmsg *ndm;
198
199 if (dump->idx < dump->cb->args[2])
200 goto skip;
201
202 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
203 sizeof(*ndm), NLM_F_MULTI);
204 if (!nlh)
205 return -EMSGSIZE;
206
207 ndm = nlmsg_data(nlh);
208 ndm->ndm_family = AF_BRIDGE;
209 ndm->ndm_pad1 = 0;
210 ndm->ndm_pad2 = 0;
211 ndm->ndm_flags = NTF_SELF;
212 ndm->ndm_type = 0;
213 ndm->ndm_ifindex = dump->dev->ifindex;
214 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
215
216 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
217 goto nla_put_failure;
218
219 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
220 goto nla_put_failure;
221
222 nlmsg_end(dump->skb, nlh);
223
224 skip:
225 dump->idx++;
226 return 0;
227
228 nla_put_failure:
229 nlmsg_cancel(dump->skb, nlh);
230 return -EMSGSIZE;
231 }
232
233 static int
234 dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
235 struct net_device *dev, struct net_device *filter_dev,
236 int *idx)
237 {
238 struct dsa_port *dp = dsa_slave_to_port(dev);
239 struct dsa_slave_dump_ctx dump = {
240 .dev = dev,
241 .skb = skb,
242 .cb = cb,
243 .idx = *idx,
244 };
245 int err;
246
247 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump);
248 *idx = dump.idx;
249
250 return err;
251 }
252
253 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
254 {
255 struct dsa_slave_priv *p = netdev_priv(dev);
256 struct dsa_switch *ds = p->dp->ds;
257 int port = p->dp->index;
258
259 /* Pass through to switch driver if it supports timestamping */
260 switch (cmd) {
261 case SIOCGHWTSTAMP:
262 if (ds->ops->port_hwtstamp_get)
263 return ds->ops->port_hwtstamp_get(ds, port, ifr);
264 break;
265 case SIOCSHWTSTAMP:
266 if (ds->ops->port_hwtstamp_set)
267 return ds->ops->port_hwtstamp_set(ds, port, ifr);
268 break;
269 }
270
271 return phylink_mii_ioctl(p->dp->pl, ifr, cmd);
272 }
273
274 static int dsa_slave_port_attr_set(struct net_device *dev,
275 const struct switchdev_attr *attr,
276 struct switchdev_trans *trans)
277 {
278 struct dsa_port *dp = dsa_slave_to_port(dev);
279 int ret;
280
281 switch (attr->id) {
282 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
283 ret = dsa_port_set_state(dp, attr->u.stp_state, trans);
284 break;
285 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
286 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
287 trans);
288 break;
289 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
290 ret = dsa_port_ageing_time(dp, attr->u.ageing_time, trans);
291 break;
292 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
293 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags,
294 trans);
295 break;
296 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
297 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, trans);
298 break;
299 case SWITCHDEV_ATTR_ID_BRIDGE_MROUTER:
300 ret = dsa_port_mrouter(dp->cpu_dp, attr->u.mrouter, trans);
301 break;
302 default:
303 ret = -EOPNOTSUPP;
304 break;
305 }
306
307 return ret;
308 }
309
310 static int dsa_slave_vlan_add(struct net_device *dev,
311 const struct switchdev_obj *obj,
312 struct switchdev_trans *trans)
313 {
314 struct dsa_port *dp = dsa_slave_to_port(dev);
315 struct switchdev_obj_port_vlan vlan;
316 int err;
317
318 if (obj->orig_dev != dev)
319 return -EOPNOTSUPP;
320
321 if (dp->bridge_dev && !br_vlan_enabled(dp->bridge_dev))
322 return 0;
323
324 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj);
325
326 err = dsa_port_vlan_add(dp, &vlan, trans);
327 if (err)
328 return err;
329
330 /* We need the dedicated CPU port to be a member of the VLAN as well.
331 * Even though drivers often handle CPU membership in special ways,
332 * it doesn't make sense to program a PVID, so clear this flag.
333 */
334 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID;
335
336 err = dsa_port_vlan_add(dp->cpu_dp, &vlan, trans);
337 if (err)
338 return err;
339
340 return 0;
341 }
342
343 static int dsa_slave_port_obj_add(struct net_device *dev,
344 const struct switchdev_obj *obj,
345 struct switchdev_trans *trans,
346 struct netlink_ext_ack *extack)
347 {
348 struct dsa_port *dp = dsa_slave_to_port(dev);
349 int err;
350
351 /* For the prepare phase, ensure the full set of changes is feasable in
352 * one go in order to signal a failure properly. If an operation is not
353 * supported, return -EOPNOTSUPP.
354 */
355
356 switch (obj->id) {
357 case SWITCHDEV_OBJ_ID_PORT_MDB:
358 if (obj->orig_dev != dev)
359 return -EOPNOTSUPP;
360 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans);
361 break;
362 case SWITCHDEV_OBJ_ID_HOST_MDB:
363 /* DSA can directly translate this to a normal MDB add,
364 * but on the CPU port.
365 */
366 err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj),
367 trans);
368 break;
369 case SWITCHDEV_OBJ_ID_PORT_VLAN:
370 err = dsa_slave_vlan_add(dev, obj, trans);
371 break;
372 default:
373 err = -EOPNOTSUPP;
374 break;
375 }
376
377 return err;
378 }
379
380 static int dsa_slave_vlan_del(struct net_device *dev,
381 const struct switchdev_obj *obj)
382 {
383 struct dsa_port *dp = dsa_slave_to_port(dev);
384
385 if (obj->orig_dev != dev)
386 return -EOPNOTSUPP;
387
388 if (dp->bridge_dev && !br_vlan_enabled(dp->bridge_dev))
389 return 0;
390
391 /* Do not deprogram the CPU port as it may be shared with other user
392 * ports which can be members of this VLAN as well.
393 */
394 return dsa_port_vlan_del(dp, SWITCHDEV_OBJ_PORT_VLAN(obj));
395 }
396
397 static int dsa_slave_port_obj_del(struct net_device *dev,
398 const struct switchdev_obj *obj)
399 {
400 struct dsa_port *dp = dsa_slave_to_port(dev);
401 int err;
402
403 switch (obj->id) {
404 case SWITCHDEV_OBJ_ID_PORT_MDB:
405 if (obj->orig_dev != dev)
406 return -EOPNOTSUPP;
407 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
408 break;
409 case SWITCHDEV_OBJ_ID_HOST_MDB:
410 /* DSA can directly translate this to a normal MDB add,
411 * but on the CPU port.
412 */
413 err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj));
414 break;
415 case SWITCHDEV_OBJ_ID_PORT_VLAN:
416 err = dsa_slave_vlan_del(dev, obj);
417 break;
418 default:
419 err = -EOPNOTSUPP;
420 break;
421 }
422
423 return err;
424 }
425
426 static int dsa_slave_get_port_parent_id(struct net_device *dev,
427 struct netdev_phys_item_id *ppid)
428 {
429 struct dsa_port *dp = dsa_slave_to_port(dev);
430 struct dsa_switch *ds = dp->ds;
431 struct dsa_switch_tree *dst = ds->dst;
432
433 /* For non-legacy ports, devlink is used and it takes
434 * care of the name generation. This ndo implementation
435 * should be removed with legacy support.
436 */
437 if (dp->ds->devlink)
438 return -EOPNOTSUPP;
439
440 ppid->id_len = sizeof(dst->index);
441 memcpy(&ppid->id, &dst->index, ppid->id_len);
442
443 return 0;
444 }
445
446 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
447 struct sk_buff *skb)
448 {
449 #ifdef CONFIG_NET_POLL_CONTROLLER
450 struct dsa_slave_priv *p = netdev_priv(dev);
451
452 if (p->netpoll)
453 netpoll_send_skb(p->netpoll, skb);
454 #else
455 BUG();
456 #endif
457 return NETDEV_TX_OK;
458 }
459
460 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
461 struct sk_buff *skb)
462 {
463 struct dsa_switch *ds = p->dp->ds;
464 struct sk_buff *clone;
465 unsigned int type;
466
467 type = ptp_classify_raw(skb);
468 if (type == PTP_CLASS_NONE)
469 return;
470
471 if (!ds->ops->port_txtstamp)
472 return;
473
474 clone = skb_clone_sk(skb);
475 if (!clone)
476 return;
477
478 DSA_SKB_CB(skb)->clone = clone;
479
480 if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type))
481 return;
482
483 kfree_skb(clone);
484 }
485
486 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
487 {
488 /* SKB for netpoll still need to be mangled with the protocol-specific
489 * tag to be successfully transmitted
490 */
491 if (unlikely(netpoll_tx_running(dev)))
492 return dsa_slave_netpoll_send_skb(dev, skb);
493
494 /* Queue the SKB for transmission on the parent interface, but
495 * do not modify its EtherType
496 */
497 skb->dev = dsa_slave_to_master(dev);
498 dev_queue_xmit(skb);
499
500 return NETDEV_TX_OK;
501 }
502 EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
503
504 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
505 {
506 struct dsa_slave_priv *p = netdev_priv(dev);
507 struct pcpu_sw_netstats *s;
508 struct sk_buff *nskb;
509
510 s = this_cpu_ptr(p->stats64);
511 u64_stats_update_begin(&s->syncp);
512 s->tx_packets++;
513 s->tx_bytes += skb->len;
514 u64_stats_update_end(&s->syncp);
515
516 DSA_SKB_CB(skb)->clone = NULL;
517
518 /* Identify PTP protocol packets, clone them, and pass them to the
519 * switch driver
520 */
521 dsa_skb_tx_timestamp(p, skb);
522
523 /* Transmit function may have to reallocate the original SKB,
524 * in which case it must have freed it. Only free it here on error.
525 */
526 nskb = p->xmit(skb, dev);
527 if (!nskb) {
528 kfree_skb(skb);
529 return NETDEV_TX_OK;
530 }
531
532 return dsa_enqueue_skb(nskb, dev);
533 }
534
535 /* ethtool operations *******************************************************/
536
537 static void dsa_slave_get_drvinfo(struct net_device *dev,
538 struct ethtool_drvinfo *drvinfo)
539 {
540 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
541 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
542 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
543 }
544
545 static int dsa_slave_get_regs_len(struct net_device *dev)
546 {
547 struct dsa_port *dp = dsa_slave_to_port(dev);
548 struct dsa_switch *ds = dp->ds;
549
550 if (ds->ops->get_regs_len)
551 return ds->ops->get_regs_len(ds, dp->index);
552
553 return -EOPNOTSUPP;
554 }
555
556 static void
557 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
558 {
559 struct dsa_port *dp = dsa_slave_to_port(dev);
560 struct dsa_switch *ds = dp->ds;
561
562 if (ds->ops->get_regs)
563 ds->ops->get_regs(ds, dp->index, regs, _p);
564 }
565
566 static int dsa_slave_nway_reset(struct net_device *dev)
567 {
568 struct dsa_port *dp = dsa_slave_to_port(dev);
569
570 return phylink_ethtool_nway_reset(dp->pl);
571 }
572
573 static int dsa_slave_get_eeprom_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->cd && ds->cd->eeprom_len)
579 return ds->cd->eeprom_len;
580
581 if (ds->ops->get_eeprom_len)
582 return ds->ops->get_eeprom_len(ds);
583
584 return 0;
585 }
586
587 static int dsa_slave_get_eeprom(struct net_device *dev,
588 struct ethtool_eeprom *eeprom, u8 *data)
589 {
590 struct dsa_port *dp = dsa_slave_to_port(dev);
591 struct dsa_switch *ds = dp->ds;
592
593 if (ds->ops->get_eeprom)
594 return ds->ops->get_eeprom(ds, eeprom, data);
595
596 return -EOPNOTSUPP;
597 }
598
599 static int dsa_slave_set_eeprom(struct net_device *dev,
600 struct ethtool_eeprom *eeprom, u8 *data)
601 {
602 struct dsa_port *dp = dsa_slave_to_port(dev);
603 struct dsa_switch *ds = dp->ds;
604
605 if (ds->ops->set_eeprom)
606 return ds->ops->set_eeprom(ds, eeprom, data);
607
608 return -EOPNOTSUPP;
609 }
610
611 static void dsa_slave_get_strings(struct net_device *dev,
612 uint32_t stringset, uint8_t *data)
613 {
614 struct dsa_port *dp = dsa_slave_to_port(dev);
615 struct dsa_switch *ds = dp->ds;
616
617 if (stringset == ETH_SS_STATS) {
618 int len = ETH_GSTRING_LEN;
619
620 strncpy(data, "tx_packets", len);
621 strncpy(data + len, "tx_bytes", len);
622 strncpy(data + 2 * len, "rx_packets", len);
623 strncpy(data + 3 * len, "rx_bytes", len);
624 if (ds->ops->get_strings)
625 ds->ops->get_strings(ds, dp->index, stringset,
626 data + 4 * len);
627 }
628 }
629
630 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
631 struct ethtool_stats *stats,
632 uint64_t *data)
633 {
634 struct dsa_port *dp = dsa_slave_to_port(dev);
635 struct dsa_slave_priv *p = netdev_priv(dev);
636 struct dsa_switch *ds = dp->ds;
637 struct pcpu_sw_netstats *s;
638 unsigned int start;
639 int i;
640
641 for_each_possible_cpu(i) {
642 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
643
644 s = per_cpu_ptr(p->stats64, i);
645 do {
646 start = u64_stats_fetch_begin_irq(&s->syncp);
647 tx_packets = s->tx_packets;
648 tx_bytes = s->tx_bytes;
649 rx_packets = s->rx_packets;
650 rx_bytes = s->rx_bytes;
651 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
652 data[0] += tx_packets;
653 data[1] += tx_bytes;
654 data[2] += rx_packets;
655 data[3] += rx_bytes;
656 }
657 if (ds->ops->get_ethtool_stats)
658 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
659 }
660
661 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
662 {
663 struct dsa_port *dp = dsa_slave_to_port(dev);
664 struct dsa_switch *ds = dp->ds;
665
666 if (sset == ETH_SS_STATS) {
667 int count;
668
669 count = 4;
670 if (ds->ops->get_sset_count)
671 count += ds->ops->get_sset_count(ds, dp->index, sset);
672
673 return count;
674 }
675
676 return -EOPNOTSUPP;
677 }
678
679 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
680 {
681 struct dsa_port *dp = dsa_slave_to_port(dev);
682 struct dsa_switch *ds = dp->ds;
683
684 phylink_ethtool_get_wol(dp->pl, w);
685
686 if (ds->ops->get_wol)
687 ds->ops->get_wol(ds, dp->index, w);
688 }
689
690 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
691 {
692 struct dsa_port *dp = dsa_slave_to_port(dev);
693 struct dsa_switch *ds = dp->ds;
694 int ret = -EOPNOTSUPP;
695
696 phylink_ethtool_set_wol(dp->pl, w);
697
698 if (ds->ops->set_wol)
699 ret = ds->ops->set_wol(ds, dp->index, w);
700
701 return ret;
702 }
703
704 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
705 {
706 struct dsa_port *dp = dsa_slave_to_port(dev);
707 struct dsa_switch *ds = dp->ds;
708 int ret;
709
710 /* Port's PHY and MAC both need to be EEE capable */
711 if (!dev->phydev || !dp->pl)
712 return -ENODEV;
713
714 if (!ds->ops->set_mac_eee)
715 return -EOPNOTSUPP;
716
717 ret = ds->ops->set_mac_eee(ds, dp->index, e);
718 if (ret)
719 return ret;
720
721 return phylink_ethtool_set_eee(dp->pl, e);
722 }
723
724 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
725 {
726 struct dsa_port *dp = dsa_slave_to_port(dev);
727 struct dsa_switch *ds = dp->ds;
728 int ret;
729
730 /* Port's PHY and MAC both need to be EEE capable */
731 if (!dev->phydev || !dp->pl)
732 return -ENODEV;
733
734 if (!ds->ops->get_mac_eee)
735 return -EOPNOTSUPP;
736
737 ret = ds->ops->get_mac_eee(ds, dp->index, e);
738 if (ret)
739 return ret;
740
741 return phylink_ethtool_get_eee(dp->pl, e);
742 }
743
744 static int dsa_slave_get_link_ksettings(struct net_device *dev,
745 struct ethtool_link_ksettings *cmd)
746 {
747 struct dsa_port *dp = dsa_slave_to_port(dev);
748
749 return phylink_ethtool_ksettings_get(dp->pl, cmd);
750 }
751
752 static int dsa_slave_set_link_ksettings(struct net_device *dev,
753 const struct ethtool_link_ksettings *cmd)
754 {
755 struct dsa_port *dp = dsa_slave_to_port(dev);
756
757 return phylink_ethtool_ksettings_set(dp->pl, cmd);
758 }
759
760 static void dsa_slave_get_pauseparam(struct net_device *dev,
761 struct ethtool_pauseparam *pause)
762 {
763 struct dsa_port *dp = dsa_slave_to_port(dev);
764
765 phylink_ethtool_get_pauseparam(dp->pl, pause);
766 }
767
768 static int dsa_slave_set_pauseparam(struct net_device *dev,
769 struct ethtool_pauseparam *pause)
770 {
771 struct dsa_port *dp = dsa_slave_to_port(dev);
772
773 return phylink_ethtool_set_pauseparam(dp->pl, pause);
774 }
775
776 #ifdef CONFIG_NET_POLL_CONTROLLER
777 static int dsa_slave_netpoll_setup(struct net_device *dev,
778 struct netpoll_info *ni)
779 {
780 struct net_device *master = dsa_slave_to_master(dev);
781 struct dsa_slave_priv *p = netdev_priv(dev);
782 struct netpoll *netpoll;
783 int err = 0;
784
785 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
786 if (!netpoll)
787 return -ENOMEM;
788
789 err = __netpoll_setup(netpoll, master);
790 if (err) {
791 kfree(netpoll);
792 goto out;
793 }
794
795 p->netpoll = netpoll;
796 out:
797 return err;
798 }
799
800 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
801 {
802 struct dsa_slave_priv *p = netdev_priv(dev);
803 struct netpoll *netpoll = p->netpoll;
804
805 if (!netpoll)
806 return;
807
808 p->netpoll = NULL;
809
810 __netpoll_free(netpoll);
811 }
812
813 static void dsa_slave_poll_controller(struct net_device *dev)
814 {
815 }
816 #endif
817
818 static int dsa_slave_get_phys_port_name(struct net_device *dev,
819 char *name, size_t len)
820 {
821 struct dsa_port *dp = dsa_slave_to_port(dev);
822
823 /* For non-legacy ports, devlink is used and it takes
824 * care of the name generation. This ndo implementation
825 * should be removed with legacy support.
826 */
827 if (dp->ds->devlink)
828 return -EOPNOTSUPP;
829
830 if (snprintf(name, len, "p%d", dp->index) >= len)
831 return -EINVAL;
832
833 return 0;
834 }
835
836 static struct dsa_mall_tc_entry *
837 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
838 {
839 struct dsa_slave_priv *p = netdev_priv(dev);
840 struct dsa_mall_tc_entry *mall_tc_entry;
841
842 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
843 if (mall_tc_entry->cookie == cookie)
844 return mall_tc_entry;
845
846 return NULL;
847 }
848
849 static int dsa_slave_add_cls_matchall(struct net_device *dev,
850 struct tc_cls_matchall_offload *cls,
851 bool ingress)
852 {
853 struct dsa_port *dp = dsa_slave_to_port(dev);
854 struct dsa_slave_priv *p = netdev_priv(dev);
855 struct dsa_mall_tc_entry *mall_tc_entry;
856 __be16 protocol = cls->common.protocol;
857 struct dsa_switch *ds = dp->ds;
858 struct flow_action_entry *act;
859 struct dsa_port *to_dp;
860 int err = -EOPNOTSUPP;
861
862 if (!ds->ops->port_mirror_add)
863 return err;
864
865 if (!flow_offload_has_one_action(&cls->rule->action))
866 return err;
867
868 act = &cls->rule->action.entries[0];
869
870 if (act->id == FLOW_ACTION_MIRRED && protocol == htons(ETH_P_ALL)) {
871 struct dsa_mall_mirror_tc_entry *mirror;
872
873 if (!act->dev)
874 return -EINVAL;
875
876 if (!dsa_slave_dev_check(act->dev))
877 return -EOPNOTSUPP;
878
879 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
880 if (!mall_tc_entry)
881 return -ENOMEM;
882
883 mall_tc_entry->cookie = cls->cookie;
884 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
885 mirror = &mall_tc_entry->mirror;
886
887 to_dp = dsa_slave_to_port(act->dev);
888
889 mirror->to_local_port = to_dp->index;
890 mirror->ingress = ingress;
891
892 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
893 if (err) {
894 kfree(mall_tc_entry);
895 return err;
896 }
897
898 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
899 }
900
901 return 0;
902 }
903
904 static void dsa_slave_del_cls_matchall(struct net_device *dev,
905 struct tc_cls_matchall_offload *cls)
906 {
907 struct dsa_port *dp = dsa_slave_to_port(dev);
908 struct dsa_mall_tc_entry *mall_tc_entry;
909 struct dsa_switch *ds = dp->ds;
910
911 if (!ds->ops->port_mirror_del)
912 return;
913
914 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
915 if (!mall_tc_entry)
916 return;
917
918 list_del(&mall_tc_entry->list);
919
920 switch (mall_tc_entry->type) {
921 case DSA_PORT_MALL_MIRROR:
922 ds->ops->port_mirror_del(ds, dp->index, &mall_tc_entry->mirror);
923 break;
924 default:
925 WARN_ON(1);
926 }
927
928 kfree(mall_tc_entry);
929 }
930
931 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
932 struct tc_cls_matchall_offload *cls,
933 bool ingress)
934 {
935 if (cls->common.chain_index)
936 return -EOPNOTSUPP;
937
938 switch (cls->command) {
939 case TC_CLSMATCHALL_REPLACE:
940 return dsa_slave_add_cls_matchall(dev, cls, ingress);
941 case TC_CLSMATCHALL_DESTROY:
942 dsa_slave_del_cls_matchall(dev, cls);
943 return 0;
944 default:
945 return -EOPNOTSUPP;
946 }
947 }
948
949 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
950 void *cb_priv, bool ingress)
951 {
952 struct net_device *dev = cb_priv;
953
954 if (!tc_can_offload(dev))
955 return -EOPNOTSUPP;
956
957 switch (type) {
958 case TC_SETUP_CLSMATCHALL:
959 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
960 default:
961 return -EOPNOTSUPP;
962 }
963 }
964
965 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
966 void *type_data, void *cb_priv)
967 {
968 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
969 }
970
971 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
972 void *type_data, void *cb_priv)
973 {
974 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
975 }
976
977 static LIST_HEAD(dsa_slave_block_cb_list);
978
979 static int dsa_slave_setup_tc_block(struct net_device *dev,
980 struct flow_block_offload *f)
981 {
982 struct flow_block_cb *block_cb;
983 flow_setup_cb_t *cb;
984
985 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
986 cb = dsa_slave_setup_tc_block_cb_ig;
987 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
988 cb = dsa_slave_setup_tc_block_cb_eg;
989 else
990 return -EOPNOTSUPP;
991
992 f->driver_block_list = &dsa_slave_block_cb_list;
993
994 switch (f->command) {
995 case FLOW_BLOCK_BIND:
996 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list))
997 return -EBUSY;
998
999 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL);
1000 if (IS_ERR(block_cb))
1001 return PTR_ERR(block_cb);
1002
1003 flow_block_cb_add(block_cb, f);
1004 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list);
1005 return 0;
1006 case FLOW_BLOCK_UNBIND:
1007 block_cb = flow_block_cb_lookup(f->block, cb, dev);
1008 if (!block_cb)
1009 return -ENOENT;
1010
1011 flow_block_cb_remove(block_cb, f);
1012 list_del(&block_cb->driver_list);
1013 return 0;
1014 default:
1015 return -EOPNOTSUPP;
1016 }
1017 }
1018
1019 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
1020 void *type_data)
1021 {
1022 struct dsa_port *dp = dsa_slave_to_port(dev);
1023 struct dsa_switch *ds = dp->ds;
1024
1025 if (type == TC_SETUP_BLOCK)
1026 return dsa_slave_setup_tc_block(dev, type_data);
1027
1028 if (!ds->ops->port_setup_tc)
1029 return -EOPNOTSUPP;
1030
1031 return ds->ops->port_setup_tc(ds, dp->index, type, type_data);
1032 }
1033
1034 static void dsa_slave_get_stats64(struct net_device *dev,
1035 struct rtnl_link_stats64 *stats)
1036 {
1037 struct dsa_slave_priv *p = netdev_priv(dev);
1038 struct pcpu_sw_netstats *s;
1039 unsigned int start;
1040 int i;
1041
1042 netdev_stats_to_stats64(stats, &dev->stats);
1043 for_each_possible_cpu(i) {
1044 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
1045
1046 s = per_cpu_ptr(p->stats64, i);
1047 do {
1048 start = u64_stats_fetch_begin_irq(&s->syncp);
1049 tx_packets = s->tx_packets;
1050 tx_bytes = s->tx_bytes;
1051 rx_packets = s->rx_packets;
1052 rx_bytes = s->rx_bytes;
1053 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
1054
1055 stats->tx_packets += tx_packets;
1056 stats->tx_bytes += tx_bytes;
1057 stats->rx_packets += rx_packets;
1058 stats->rx_bytes += rx_bytes;
1059 }
1060 }
1061
1062 static int dsa_slave_get_rxnfc(struct net_device *dev,
1063 struct ethtool_rxnfc *nfc, u32 *rule_locs)
1064 {
1065 struct dsa_port *dp = dsa_slave_to_port(dev);
1066 struct dsa_switch *ds = dp->ds;
1067
1068 if (!ds->ops->get_rxnfc)
1069 return -EOPNOTSUPP;
1070
1071 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
1072 }
1073
1074 static int dsa_slave_set_rxnfc(struct net_device *dev,
1075 struct ethtool_rxnfc *nfc)
1076 {
1077 struct dsa_port *dp = dsa_slave_to_port(dev);
1078 struct dsa_switch *ds = dp->ds;
1079
1080 if (!ds->ops->set_rxnfc)
1081 return -EOPNOTSUPP;
1082
1083 return ds->ops->set_rxnfc(ds, dp->index, nfc);
1084 }
1085
1086 static int dsa_slave_get_ts_info(struct net_device *dev,
1087 struct ethtool_ts_info *ts)
1088 {
1089 struct dsa_slave_priv *p = netdev_priv(dev);
1090 struct dsa_switch *ds = p->dp->ds;
1091
1092 if (!ds->ops->get_ts_info)
1093 return -EOPNOTSUPP;
1094
1095 return ds->ops->get_ts_info(ds, p->dp->index, ts);
1096 }
1097
1098 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
1099 u16 vid)
1100 {
1101 struct dsa_port *dp = dsa_slave_to_port(dev);
1102 struct bridge_vlan_info info;
1103 int ret;
1104
1105 /* Check for a possible bridge VLAN entry now since there is no
1106 * need to emulate the switchdev prepare + commit phase.
1107 */
1108 if (dp->bridge_dev) {
1109 if (!br_vlan_enabled(dp->bridge_dev))
1110 return 0;
1111
1112 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
1113 * device, respectively the VID is not found, returning
1114 * 0 means success, which is a failure for us here.
1115 */
1116 ret = br_vlan_get_info(dp->bridge_dev, vid, &info);
1117 if (ret == 0)
1118 return -EBUSY;
1119 }
1120
1121 ret = dsa_port_vid_add(dp, vid, 0);
1122 if (ret)
1123 return ret;
1124
1125 ret = dsa_port_vid_add(dp->cpu_dp, vid, 0);
1126 if (ret)
1127 return ret;
1128
1129 return 0;
1130 }
1131
1132 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
1133 u16 vid)
1134 {
1135 struct dsa_port *dp = dsa_slave_to_port(dev);
1136 struct bridge_vlan_info info;
1137 int ret;
1138
1139 /* Check for a possible bridge VLAN entry now since there is no
1140 * need to emulate the switchdev prepare + commit phase.
1141 */
1142 if (dp->bridge_dev) {
1143 if (!br_vlan_enabled(dp->bridge_dev))
1144 return 0;
1145
1146 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
1147 * device, respectively the VID is not found, returning
1148 * 0 means success, which is a failure for us here.
1149 */
1150 ret = br_vlan_get_info(dp->bridge_dev, vid, &info);
1151 if (ret == 0)
1152 return -EBUSY;
1153 }
1154
1155 /* Do not deprogram the CPU port as it may be shared with other user
1156 * ports which can be members of this VLAN as well.
1157 */
1158 return dsa_port_vid_del(dp, vid);
1159 }
1160
1161 static const struct ethtool_ops dsa_slave_ethtool_ops = {
1162 .get_drvinfo = dsa_slave_get_drvinfo,
1163 .get_regs_len = dsa_slave_get_regs_len,
1164 .get_regs = dsa_slave_get_regs,
1165 .nway_reset = dsa_slave_nway_reset,
1166 .get_link = ethtool_op_get_link,
1167 .get_eeprom_len = dsa_slave_get_eeprom_len,
1168 .get_eeprom = dsa_slave_get_eeprom,
1169 .set_eeprom = dsa_slave_set_eeprom,
1170 .get_strings = dsa_slave_get_strings,
1171 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
1172 .get_sset_count = dsa_slave_get_sset_count,
1173 .set_wol = dsa_slave_set_wol,
1174 .get_wol = dsa_slave_get_wol,
1175 .set_eee = dsa_slave_set_eee,
1176 .get_eee = dsa_slave_get_eee,
1177 .get_link_ksettings = dsa_slave_get_link_ksettings,
1178 .set_link_ksettings = dsa_slave_set_link_ksettings,
1179 .get_pauseparam = dsa_slave_get_pauseparam,
1180 .set_pauseparam = dsa_slave_set_pauseparam,
1181 .get_rxnfc = dsa_slave_get_rxnfc,
1182 .set_rxnfc = dsa_slave_set_rxnfc,
1183 .get_ts_info = dsa_slave_get_ts_info,
1184 };
1185
1186 /* legacy way, bypassing the bridge *****************************************/
1187 int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
1188 struct net_device *dev,
1189 const unsigned char *addr, u16 vid,
1190 u16 flags,
1191 struct netlink_ext_ack *extack)
1192 {
1193 struct dsa_port *dp = dsa_slave_to_port(dev);
1194
1195 return dsa_port_fdb_add(dp, addr, vid);
1196 }
1197
1198 int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
1199 struct net_device *dev,
1200 const unsigned char *addr, u16 vid)
1201 {
1202 struct dsa_port *dp = dsa_slave_to_port(dev);
1203
1204 return dsa_port_fdb_del(dp, addr, vid);
1205 }
1206
1207 static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
1208 {
1209 struct dsa_port *dp = dsa_slave_to_port(dev);
1210
1211 return dp->ds->devlink ? &dp->devlink_port : NULL;
1212 }
1213
1214 static const struct net_device_ops dsa_slave_netdev_ops = {
1215 .ndo_open = dsa_slave_open,
1216 .ndo_stop = dsa_slave_close,
1217 .ndo_start_xmit = dsa_slave_xmit,
1218 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
1219 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
1220 .ndo_set_mac_address = dsa_slave_set_mac_address,
1221 .ndo_fdb_add = dsa_legacy_fdb_add,
1222 .ndo_fdb_del = dsa_legacy_fdb_del,
1223 .ndo_fdb_dump = dsa_slave_fdb_dump,
1224 .ndo_do_ioctl = dsa_slave_ioctl,
1225 .ndo_get_iflink = dsa_slave_get_iflink,
1226 #ifdef CONFIG_NET_POLL_CONTROLLER
1227 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
1228 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
1229 .ndo_poll_controller = dsa_slave_poll_controller,
1230 #endif
1231 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
1232 .ndo_setup_tc = dsa_slave_setup_tc,
1233 .ndo_get_stats64 = dsa_slave_get_stats64,
1234 .ndo_get_port_parent_id = dsa_slave_get_port_parent_id,
1235 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
1236 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
1237 .ndo_get_devlink_port = dsa_slave_get_devlink_port,
1238 };
1239
1240 static struct device_type dsa_type = {
1241 .name = "dsa",
1242 };
1243
1244 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
1245 {
1246 const struct dsa_port *dp = dsa_to_port(ds, port);
1247
1248 phylink_mac_change(dp->pl, up);
1249 }
1250 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
1251
1252 static void dsa_slave_phylink_fixed_state(struct net_device *dev,
1253 struct phylink_link_state *state)
1254 {
1255 struct dsa_port *dp = dsa_slave_to_port(dev);
1256 struct dsa_switch *ds = dp->ds;
1257
1258 /* No need to check that this operation is valid, the callback would
1259 * not be called if it was not.
1260 */
1261 ds->ops->phylink_fixed_state(ds, dp->index, state);
1262 }
1263
1264 /* slave device setup *******************************************************/
1265 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
1266 {
1267 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1268 struct dsa_switch *ds = dp->ds;
1269
1270 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
1271 if (!slave_dev->phydev) {
1272 netdev_err(slave_dev, "no phy at %d\n", addr);
1273 return -ENODEV;
1274 }
1275
1276 return phylink_connect_phy(dp->pl, slave_dev->phydev);
1277 }
1278
1279 static int dsa_slave_phy_setup(struct net_device *slave_dev)
1280 {
1281 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1282 struct device_node *port_dn = dp->dn;
1283 struct dsa_switch *ds = dp->ds;
1284 phy_interface_t mode;
1285 u32 phy_flags = 0;
1286 int ret;
1287
1288 ret = of_get_phy_mode(port_dn, &mode);
1289 if (ret)
1290 mode = PHY_INTERFACE_MODE_NA;
1291
1292 dp->pl_config.dev = &slave_dev->dev;
1293 dp->pl_config.type = PHYLINK_NETDEV;
1294
1295 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode,
1296 &dsa_port_phylink_mac_ops);
1297 if (IS_ERR(dp->pl)) {
1298 netdev_err(slave_dev,
1299 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1300 return PTR_ERR(dp->pl);
1301 }
1302
1303 /* Register only if the switch provides such a callback, since this
1304 * callback takes precedence over polling the link GPIO in PHYLINK
1305 * (see phylink_get_fixed_state).
1306 */
1307 if (ds->ops->phylink_fixed_state)
1308 phylink_fixed_state_cb(dp->pl, dsa_slave_phylink_fixed_state);
1309
1310 if (ds->ops->get_phy_flags)
1311 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
1312
1313 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
1314 if (ret == -ENODEV && ds->slave_mii_bus) {
1315 /* We could not connect to a designated PHY or SFP, so try to
1316 * use the switch internal MDIO bus instead
1317 */
1318 ret = dsa_slave_phy_connect(slave_dev, dp->index);
1319 if (ret) {
1320 netdev_err(slave_dev,
1321 "failed to connect to port %d: %d\n",
1322 dp->index, ret);
1323 phylink_destroy(dp->pl);
1324 return ret;
1325 }
1326 }
1327
1328 return ret;
1329 }
1330
1331 int dsa_slave_suspend(struct net_device *slave_dev)
1332 {
1333 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1334
1335 if (!netif_running(slave_dev))
1336 return 0;
1337
1338 netif_device_detach(slave_dev);
1339
1340 rtnl_lock();
1341 phylink_stop(dp->pl);
1342 rtnl_unlock();
1343
1344 return 0;
1345 }
1346
1347 int dsa_slave_resume(struct net_device *slave_dev)
1348 {
1349 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1350
1351 if (!netif_running(slave_dev))
1352 return 0;
1353
1354 netif_device_attach(slave_dev);
1355
1356 rtnl_lock();
1357 phylink_start(dp->pl);
1358 rtnl_unlock();
1359
1360 return 0;
1361 }
1362
1363 static void dsa_slave_notify(struct net_device *dev, unsigned long val)
1364 {
1365 struct net_device *master = dsa_slave_to_master(dev);
1366 struct dsa_port *dp = dsa_slave_to_port(dev);
1367 struct dsa_notifier_register_info rinfo = {
1368 .switch_number = dp->ds->index,
1369 .port_number = dp->index,
1370 .master = master,
1371 .info.dev = dev,
1372 };
1373
1374 call_dsa_notifiers(val, dev, &rinfo.info);
1375 }
1376
1377 int dsa_slave_create(struct dsa_port *port)
1378 {
1379 const struct dsa_port *cpu_dp = port->cpu_dp;
1380 struct net_device *master = cpu_dp->master;
1381 struct dsa_switch *ds = port->ds;
1382 const char *name = port->name;
1383 struct net_device *slave_dev;
1384 struct dsa_slave_priv *p;
1385 int ret;
1386
1387 if (!ds->num_tx_queues)
1388 ds->num_tx_queues = 1;
1389
1390 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
1391 NET_NAME_UNKNOWN, ether_setup,
1392 ds->num_tx_queues, 1);
1393 if (slave_dev == NULL)
1394 return -ENOMEM;
1395
1396 slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
1397 if (ds->ops->port_vlan_add && ds->ops->port_vlan_del)
1398 slave_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1399 slave_dev->hw_features |= NETIF_F_HW_TC;
1400 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1401 if (!IS_ERR_OR_NULL(port->mac))
1402 ether_addr_copy(slave_dev->dev_addr, port->mac);
1403 else
1404 eth_hw_addr_inherit(slave_dev, master);
1405 slave_dev->priv_flags |= IFF_NO_QUEUE;
1406 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1407 slave_dev->min_mtu = 0;
1408 slave_dev->max_mtu = ETH_MAX_MTU;
1409 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1410
1411 SET_NETDEV_DEV(slave_dev, port->ds->dev);
1412 slave_dev->dev.of_node = port->dn;
1413 slave_dev->vlan_features = master->vlan_features;
1414
1415 p = netdev_priv(slave_dev);
1416 p->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1417 if (!p->stats64) {
1418 free_netdev(slave_dev);
1419 return -ENOMEM;
1420 }
1421 p->dp = port;
1422 INIT_LIST_HEAD(&p->mall_tc_list);
1423 p->xmit = cpu_dp->tag_ops->xmit;
1424 port->slave = slave_dev;
1425
1426 netif_carrier_off(slave_dev);
1427
1428 ret = dsa_slave_phy_setup(slave_dev);
1429 if (ret) {
1430 netdev_err(master, "error %d setting up slave phy\n", ret);
1431 goto out_free;
1432 }
1433
1434 dsa_slave_notify(slave_dev, DSA_PORT_REGISTER);
1435
1436 ret = register_netdev(slave_dev);
1437 if (ret) {
1438 netdev_err(master, "error %d registering interface %s\n",
1439 ret, slave_dev->name);
1440 goto out_phy;
1441 }
1442
1443 return 0;
1444
1445 out_phy:
1446 rtnl_lock();
1447 phylink_disconnect_phy(p->dp->pl);
1448 rtnl_unlock();
1449 phylink_destroy(p->dp->pl);
1450 out_free:
1451 free_percpu(p->stats64);
1452 free_netdev(slave_dev);
1453 port->slave = NULL;
1454 return ret;
1455 }
1456
1457 void dsa_slave_destroy(struct net_device *slave_dev)
1458 {
1459 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1460 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1461
1462 netif_carrier_off(slave_dev);
1463 rtnl_lock();
1464 phylink_disconnect_phy(dp->pl);
1465 rtnl_unlock();
1466
1467 dsa_slave_notify(slave_dev, DSA_PORT_UNREGISTER);
1468 unregister_netdev(slave_dev);
1469 phylink_destroy(dp->pl);
1470 free_percpu(p->stats64);
1471 free_netdev(slave_dev);
1472 }
1473
1474 bool dsa_slave_dev_check(const struct net_device *dev)
1475 {
1476 return dev->netdev_ops == &dsa_slave_netdev_ops;
1477 }
1478
1479 static int dsa_slave_changeupper(struct net_device *dev,
1480 struct netdev_notifier_changeupper_info *info)
1481 {
1482 struct dsa_port *dp = dsa_slave_to_port(dev);
1483 int err = NOTIFY_DONE;
1484
1485 if (netif_is_bridge_master(info->upper_dev)) {
1486 if (info->linking) {
1487 err = dsa_port_bridge_join(dp, info->upper_dev);
1488 err = notifier_from_errno(err);
1489 } else {
1490 dsa_port_bridge_leave(dp, info->upper_dev);
1491 err = NOTIFY_OK;
1492 }
1493 }
1494
1495 return err;
1496 }
1497
1498 static int dsa_slave_upper_vlan_check(struct net_device *dev,
1499 struct netdev_notifier_changeupper_info *
1500 info)
1501 {
1502 struct netlink_ext_ack *ext_ack;
1503 struct net_device *slave;
1504 struct dsa_port *dp;
1505
1506 ext_ack = netdev_notifier_info_to_extack(&info->info);
1507
1508 if (!is_vlan_dev(dev))
1509 return NOTIFY_DONE;
1510
1511 slave = vlan_dev_real_dev(dev);
1512 if (!dsa_slave_dev_check(slave))
1513 return NOTIFY_DONE;
1514
1515 dp = dsa_slave_to_port(slave);
1516 if (!dp->bridge_dev)
1517 return NOTIFY_DONE;
1518
1519 /* Deny enslaving a VLAN device into a VLAN-aware bridge */
1520 if (br_vlan_enabled(dp->bridge_dev) &&
1521 netif_is_bridge_master(info->upper_dev) && info->linking) {
1522 NL_SET_ERR_MSG_MOD(ext_ack,
1523 "Cannot enslave VLAN device into VLAN aware bridge");
1524 return notifier_from_errno(-EINVAL);
1525 }
1526
1527 return NOTIFY_DONE;
1528 }
1529
1530 static int dsa_slave_netdevice_event(struct notifier_block *nb,
1531 unsigned long event, void *ptr)
1532 {
1533 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1534
1535 if (event == NETDEV_CHANGEUPPER) {
1536 if (!dsa_slave_dev_check(dev))
1537 return dsa_slave_upper_vlan_check(dev, ptr);
1538
1539 return dsa_slave_changeupper(dev, ptr);
1540 }
1541
1542 return NOTIFY_DONE;
1543 }
1544
1545 struct dsa_switchdev_event_work {
1546 struct work_struct work;
1547 struct switchdev_notifier_fdb_info fdb_info;
1548 struct net_device *dev;
1549 unsigned long event;
1550 };
1551
1552 static void dsa_slave_switchdev_event_work(struct work_struct *work)
1553 {
1554 struct dsa_switchdev_event_work *switchdev_work =
1555 container_of(work, struct dsa_switchdev_event_work, work);
1556 struct net_device *dev = switchdev_work->dev;
1557 struct switchdev_notifier_fdb_info *fdb_info;
1558 struct dsa_port *dp = dsa_slave_to_port(dev);
1559 int err;
1560
1561 rtnl_lock();
1562 switch (switchdev_work->event) {
1563 case SWITCHDEV_FDB_ADD_TO_DEVICE:
1564 fdb_info = &switchdev_work->fdb_info;
1565 if (!fdb_info->added_by_user)
1566 break;
1567
1568 err = dsa_port_fdb_add(dp, fdb_info->addr, fdb_info->vid);
1569 if (err) {
1570 netdev_dbg(dev, "fdb add failed err=%d\n", err);
1571 break;
1572 }
1573 fdb_info->offloaded = true;
1574 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, dev,
1575 &fdb_info->info, NULL);
1576 break;
1577
1578 case SWITCHDEV_FDB_DEL_TO_DEVICE:
1579 fdb_info = &switchdev_work->fdb_info;
1580 if (!fdb_info->added_by_user)
1581 break;
1582
1583 err = dsa_port_fdb_del(dp, fdb_info->addr, fdb_info->vid);
1584 if (err) {
1585 netdev_dbg(dev, "fdb del failed err=%d\n", err);
1586 dev_close(dev);
1587 }
1588 break;
1589 }
1590 rtnl_unlock();
1591
1592 kfree(switchdev_work->fdb_info.addr);
1593 kfree(switchdev_work);
1594 dev_put(dev);
1595 }
1596
1597 static int
1598 dsa_slave_switchdev_fdb_work_init(struct dsa_switchdev_event_work *
1599 switchdev_work,
1600 const struct switchdev_notifier_fdb_info *
1601 fdb_info)
1602 {
1603 memcpy(&switchdev_work->fdb_info, fdb_info,
1604 sizeof(switchdev_work->fdb_info));
1605 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
1606 if (!switchdev_work->fdb_info.addr)
1607 return -ENOMEM;
1608 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
1609 fdb_info->addr);
1610 return 0;
1611 }
1612
1613 /* Called under rcu_read_lock() */
1614 static int dsa_slave_switchdev_event(struct notifier_block *unused,
1615 unsigned long event, void *ptr)
1616 {
1617 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
1618 struct dsa_switchdev_event_work *switchdev_work;
1619 int err;
1620
1621 if (event == SWITCHDEV_PORT_ATTR_SET) {
1622 err = switchdev_handle_port_attr_set(dev, ptr,
1623 dsa_slave_dev_check,
1624 dsa_slave_port_attr_set);
1625 return notifier_from_errno(err);
1626 }
1627
1628 if (!dsa_slave_dev_check(dev))
1629 return NOTIFY_DONE;
1630
1631 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
1632 if (!switchdev_work)
1633 return NOTIFY_BAD;
1634
1635 INIT_WORK(&switchdev_work->work,
1636 dsa_slave_switchdev_event_work);
1637 switchdev_work->dev = dev;
1638 switchdev_work->event = event;
1639
1640 switch (event) {
1641 case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */
1642 case SWITCHDEV_FDB_DEL_TO_DEVICE:
1643 if (dsa_slave_switchdev_fdb_work_init(switchdev_work, ptr))
1644 goto err_fdb_work_init;
1645 dev_hold(dev);
1646 break;
1647 default:
1648 kfree(switchdev_work);
1649 return NOTIFY_DONE;
1650 }
1651
1652 dsa_schedule_work(&switchdev_work->work);
1653 return NOTIFY_OK;
1654
1655 err_fdb_work_init:
1656 kfree(switchdev_work);
1657 return NOTIFY_BAD;
1658 }
1659
1660 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
1661 unsigned long event, void *ptr)
1662 {
1663 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
1664 int err;
1665
1666 switch (event) {
1667 case SWITCHDEV_PORT_OBJ_ADD:
1668 err = switchdev_handle_port_obj_add(dev, ptr,
1669 dsa_slave_dev_check,
1670 dsa_slave_port_obj_add);
1671 return notifier_from_errno(err);
1672 case SWITCHDEV_PORT_OBJ_DEL:
1673 err = switchdev_handle_port_obj_del(dev, ptr,
1674 dsa_slave_dev_check,
1675 dsa_slave_port_obj_del);
1676 return notifier_from_errno(err);
1677 case SWITCHDEV_PORT_ATTR_SET:
1678 err = switchdev_handle_port_attr_set(dev, ptr,
1679 dsa_slave_dev_check,
1680 dsa_slave_port_attr_set);
1681 return notifier_from_errno(err);
1682 }
1683
1684 return NOTIFY_DONE;
1685 }
1686
1687 static struct notifier_block dsa_slave_nb __read_mostly = {
1688 .notifier_call = dsa_slave_netdevice_event,
1689 };
1690
1691 static struct notifier_block dsa_slave_switchdev_notifier = {
1692 .notifier_call = dsa_slave_switchdev_event,
1693 };
1694
1695 static struct notifier_block dsa_slave_switchdev_blocking_notifier = {
1696 .notifier_call = dsa_slave_switchdev_blocking_event,
1697 };
1698
1699 int dsa_slave_register_notifier(void)
1700 {
1701 struct notifier_block *nb;
1702 int err;
1703
1704 err = register_netdevice_notifier(&dsa_slave_nb);
1705 if (err)
1706 return err;
1707
1708 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
1709 if (err)
1710 goto err_switchdev_nb;
1711
1712 nb = &dsa_slave_switchdev_blocking_notifier;
1713 err = register_switchdev_blocking_notifier(nb);
1714 if (err)
1715 goto err_switchdev_blocking_nb;
1716
1717 return 0;
1718
1719 err_switchdev_blocking_nb:
1720 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
1721 err_switchdev_nb:
1722 unregister_netdevice_notifier(&dsa_slave_nb);
1723 return err;
1724 }
1725
1726 void dsa_slave_unregister_notifier(void)
1727 {
1728 struct notifier_block *nb;
1729 int err;
1730
1731 nb = &dsa_slave_switchdev_blocking_notifier;
1732 err = unregister_switchdev_blocking_notifier(nb);
1733 if (err)
1734 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
1735
1736 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
1737 if (err)
1738 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
1739
1740 err = unregister_netdevice_notifier(&dsa_slave_nb);
1741 if (err)
1742 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
1743 }
Linux with added FPC-III support