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dm writecache: fix incorrect flush sequence when doing SSD mode commit
[linux/fpc-iii.git] / net / dsa / slave.c
blob78ffc87dc25eb06114ee9165ed1a1dfd869720da
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(dp, dev->phydev);
94 if (err)
95 goto clear_promisc;
96
97 phylink_start(dp->pl);
98
99 return 0;
100
101 clear_promisc:
102 if (dev->flags & IFF_PROMISC)
103 dev_set_promiscuity(master, -1);
104 clear_allmulti:
105 if (dev->flags & IFF_ALLMULTI)
106 dev_set_allmulti(master, -1);
107 del_unicast:
108 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
109 dev_uc_del(master, dev->dev_addr);
110 out:
111 return err;
112 }
113
114 static int dsa_slave_close(struct net_device *dev)
115 {
116 struct net_device *master = dsa_slave_to_master(dev);
117 struct dsa_port *dp = dsa_slave_to_port(dev);
118
119 cancel_work_sync(&dp->xmit_work);
120 skb_queue_purge(&dp->xmit_queue);
121
122 phylink_stop(dp->pl);
123
124 dsa_port_disable(dp);
125
126 dev_mc_unsync(master, dev);
127 dev_uc_unsync(master, dev);
128 if (dev->flags & IFF_ALLMULTI)
129 dev_set_allmulti(master, -1);
130 if (dev->flags & IFF_PROMISC)
131 dev_set_promiscuity(master, -1);
132
133 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
134 dev_uc_del(master, dev->dev_addr);
135
136 return 0;
137 }
138
139 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
140 {
141 struct net_device *master = dsa_slave_to_master(dev);
142 if (dev->flags & IFF_UP) {
143 if (change & IFF_ALLMULTI)
144 dev_set_allmulti(master,
145 dev->flags & IFF_ALLMULTI ? 1 : -1);
146 if (change & IFF_PROMISC)
147 dev_set_promiscuity(master,
148 dev->flags & IFF_PROMISC ? 1 : -1);
149 }
150 }
151
152 static void dsa_slave_set_rx_mode(struct net_device *dev)
153 {
154 struct net_device *master = dsa_slave_to_master(dev);
155
156 dev_mc_sync(master, dev);
157 dev_uc_sync(master, dev);
158 }
159
160 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
161 {
162 struct net_device *master = dsa_slave_to_master(dev);
163 struct sockaddr *addr = a;
164 int err;
165
166 if (!is_valid_ether_addr(addr->sa_data))
167 return -EADDRNOTAVAIL;
168
169 if (!(dev->flags & IFF_UP))
170 goto out;
171
172 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
173 err = dev_uc_add(master, addr->sa_data);
174 if (err < 0)
175 return err;
176 }
177
178 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
179 dev_uc_del(master, dev->dev_addr);
180
181 out:
182 ether_addr_copy(dev->dev_addr, addr->sa_data);
183
184 return 0;
185 }
186
187 struct dsa_slave_dump_ctx {
188 struct net_device *dev;
189 struct sk_buff *skb;
190 struct netlink_callback *cb;
191 int idx;
192 };
193
194 static int
195 dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid,
196 bool is_static, void *data)
197 {
198 struct dsa_slave_dump_ctx *dump = data;
199 u32 portid = NETLINK_CB(dump->cb->skb).portid;
200 u32 seq = dump->cb->nlh->nlmsg_seq;
201 struct nlmsghdr *nlh;
202 struct ndmsg *ndm;
203
204 if (dump->idx < dump->cb->args[2])
205 goto skip;
206
207 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
208 sizeof(*ndm), NLM_F_MULTI);
209 if (!nlh)
210 return -EMSGSIZE;
211
212 ndm = nlmsg_data(nlh);
213 ndm->ndm_family = AF_BRIDGE;
214 ndm->ndm_pad1 = 0;
215 ndm->ndm_pad2 = 0;
216 ndm->ndm_flags = NTF_SELF;
217 ndm->ndm_type = 0;
218 ndm->ndm_ifindex = dump->dev->ifindex;
219 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
220
221 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
222 goto nla_put_failure;
223
224 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
225 goto nla_put_failure;
226
227 nlmsg_end(dump->skb, nlh);
228
229 skip:
230 dump->idx++;
231 return 0;
232
233 nla_put_failure:
234 nlmsg_cancel(dump->skb, nlh);
235 return -EMSGSIZE;
236 }
237
238 static int
239 dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
240 struct net_device *dev, struct net_device *filter_dev,
241 int *idx)
242 {
243 struct dsa_port *dp = dsa_slave_to_port(dev);
244 struct dsa_slave_dump_ctx dump = {
245 .dev = dev,
246 .skb = skb,
247 .cb = cb,
248 .idx = *idx,
249 };
250 int err;
251
252 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump);
253 *idx = dump.idx;
254
255 return err;
256 }
257
258 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
259 {
260 struct dsa_slave_priv *p = netdev_priv(dev);
261 struct dsa_switch *ds = p->dp->ds;
262 int port = p->dp->index;
263
264 /* Pass through to switch driver if it supports timestamping */
265 switch (cmd) {
266 case SIOCGHWTSTAMP:
267 if (ds->ops->port_hwtstamp_get)
268 return ds->ops->port_hwtstamp_get(ds, port, ifr);
269 break;
270 case SIOCSHWTSTAMP:
271 if (ds->ops->port_hwtstamp_set)
272 return ds->ops->port_hwtstamp_set(ds, port, ifr);
273 break;
274 }
275
276 return phylink_mii_ioctl(p->dp->pl, ifr, cmd);
277 }
278
279 static int dsa_slave_port_attr_set(struct net_device *dev,
280 const struct switchdev_attr *attr,
281 struct switchdev_trans *trans)
282 {
283 struct dsa_port *dp = dsa_slave_to_port(dev);
284 int ret;
285
286 switch (attr->id) {
287 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
288 ret = dsa_port_set_state(dp, attr->u.stp_state, trans);
289 break;
290 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
291 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
292 trans);
293 break;
294 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
295 ret = dsa_port_ageing_time(dp, attr->u.ageing_time, trans);
296 break;
297 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
298 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags,
299 trans);
300 break;
301 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
302 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, trans);
303 break;
304 case SWITCHDEV_ATTR_ID_BRIDGE_MROUTER:
305 ret = dsa_port_mrouter(dp->cpu_dp, attr->u.mrouter, trans);
306 break;
307 default:
308 ret = -EOPNOTSUPP;
309 break;
310 }
311
312 return ret;
313 }
314
315 static int dsa_slave_vlan_add(struct net_device *dev,
316 const struct switchdev_obj *obj,
317 struct switchdev_trans *trans)
318 {
319 struct dsa_port *dp = dsa_slave_to_port(dev);
320 struct switchdev_obj_port_vlan vlan;
321 int err;
322
323 if (obj->orig_dev != dev)
324 return -EOPNOTSUPP;
325
326 if (dp->bridge_dev && !br_vlan_enabled(dp->bridge_dev))
327 return 0;
328
329 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj);
330
331 err = dsa_port_vlan_add(dp, &vlan, trans);
332 if (err)
333 return err;
334
335 /* We need the dedicated CPU port to be a member of the VLAN as well.
336 * Even though drivers often handle CPU membership in special ways,
337 * it doesn't make sense to program a PVID, so clear this flag.
338 */
339 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID;
340
341 err = dsa_port_vlan_add(dp->cpu_dp, &vlan, trans);
342 if (err)
343 return err;
344
345 return 0;
346 }
347
348 static int dsa_slave_port_obj_add(struct net_device *dev,
349 const struct switchdev_obj *obj,
350 struct switchdev_trans *trans,
351 struct netlink_ext_ack *extack)
352 {
353 struct dsa_port *dp = dsa_slave_to_port(dev);
354 int err;
355
356 /* For the prepare phase, ensure the full set of changes is feasable in
357 * one go in order to signal a failure properly. If an operation is not
358 * supported, return -EOPNOTSUPP.
359 */
360
361 switch (obj->id) {
362 case SWITCHDEV_OBJ_ID_PORT_MDB:
363 if (obj->orig_dev != dev)
364 return -EOPNOTSUPP;
365 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans);
366 break;
367 case SWITCHDEV_OBJ_ID_HOST_MDB:
368 /* DSA can directly translate this to a normal MDB add,
369 * but on the CPU port.
370 */
371 err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj),
372 trans);
373 break;
374 case SWITCHDEV_OBJ_ID_PORT_VLAN:
375 err = dsa_slave_vlan_add(dev, obj, trans);
376 break;
377 default:
378 err = -EOPNOTSUPP;
379 break;
380 }
381
382 return err;
383 }
384
385 static int dsa_slave_vlan_del(struct net_device *dev,
386 const struct switchdev_obj *obj)
387 {
388 struct dsa_port *dp = dsa_slave_to_port(dev);
389
390 if (obj->orig_dev != dev)
391 return -EOPNOTSUPP;
392
393 if (dp->bridge_dev && !br_vlan_enabled(dp->bridge_dev))
394 return 0;
395
396 /* Do not deprogram the CPU port as it may be shared with other user
397 * ports which can be members of this VLAN as well.
398 */
399 return dsa_port_vlan_del(dp, SWITCHDEV_OBJ_PORT_VLAN(obj));
400 }
401
402 static int dsa_slave_port_obj_del(struct net_device *dev,
403 const struct switchdev_obj *obj)
404 {
405 struct dsa_port *dp = dsa_slave_to_port(dev);
406 int err;
407
408 switch (obj->id) {
409 case SWITCHDEV_OBJ_ID_PORT_MDB:
410 if (obj->orig_dev != dev)
411 return -EOPNOTSUPP;
412 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
413 break;
414 case SWITCHDEV_OBJ_ID_HOST_MDB:
415 /* DSA can directly translate this to a normal MDB add,
416 * but on the CPU port.
417 */
418 err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj));
419 break;
420 case SWITCHDEV_OBJ_ID_PORT_VLAN:
421 err = dsa_slave_vlan_del(dev, obj);
422 break;
423 default:
424 err = -EOPNOTSUPP;
425 break;
426 }
427
428 return err;
429 }
430
431 static int dsa_slave_get_port_parent_id(struct net_device *dev,
432 struct netdev_phys_item_id *ppid)
433 {
434 struct dsa_port *dp = dsa_slave_to_port(dev);
435 struct dsa_switch *ds = dp->ds;
436 struct dsa_switch_tree *dst = ds->dst;
437
438 /* For non-legacy ports, devlink is used and it takes
439 * care of the name generation. This ndo implementation
440 * should be removed with legacy support.
441 */
442 if (dp->ds->devlink)
443 return -EOPNOTSUPP;
444
445 ppid->id_len = sizeof(dst->index);
446 memcpy(&ppid->id, &dst->index, ppid->id_len);
447
448 return 0;
449 }
450
451 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
452 struct sk_buff *skb)
453 {
454 #ifdef CONFIG_NET_POLL_CONTROLLER
455 struct dsa_slave_priv *p = netdev_priv(dev);
456
457 if (p->netpoll)
458 netpoll_send_skb(p->netpoll, skb);
459 #else
460 BUG();
461 #endif
462 return NETDEV_TX_OK;
463 }
464
465 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
466 struct sk_buff *skb)
467 {
468 struct dsa_switch *ds = p->dp->ds;
469 struct sk_buff *clone;
470 unsigned int type;
471
472 type = ptp_classify_raw(skb);
473 if (type == PTP_CLASS_NONE)
474 return;
475
476 if (!ds->ops->port_txtstamp)
477 return;
478
479 clone = skb_clone_sk(skb);
480 if (!clone)
481 return;
482
483 DSA_SKB_CB(skb)->clone = clone;
484
485 if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type))
486 return;
487
488 kfree_skb(clone);
489 }
490
491 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
492 {
493 /* SKB for netpoll still need to be mangled with the protocol-specific
494 * tag to be successfully transmitted
495 */
496 if (unlikely(netpoll_tx_running(dev)))
497 return dsa_slave_netpoll_send_skb(dev, skb);
498
499 /* Queue the SKB for transmission on the parent interface, but
500 * do not modify its EtherType
501 */
502 skb->dev = dsa_slave_to_master(dev);
503 dev_queue_xmit(skb);
504
505 return NETDEV_TX_OK;
506 }
507 EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
508
509 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
510 {
511 struct dsa_slave_priv *p = netdev_priv(dev);
512 struct pcpu_sw_netstats *s;
513 struct sk_buff *nskb;
514
515 s = this_cpu_ptr(p->stats64);
516 u64_stats_update_begin(&s->syncp);
517 s->tx_packets++;
518 s->tx_bytes += skb->len;
519 u64_stats_update_end(&s->syncp);
520
521 DSA_SKB_CB(skb)->deferred_xmit = false;
522 DSA_SKB_CB(skb)->clone = NULL;
523
524 /* Identify PTP protocol packets, clone them, and pass them to the
525 * switch driver
526 */
527 dsa_skb_tx_timestamp(p, skb);
528
529 /* Transmit function may have to reallocate the original SKB,
530 * in which case it must have freed it. Only free it here on error.
531 */
532 nskb = p->xmit(skb, dev);
533 if (!nskb) {
534 if (!DSA_SKB_CB(skb)->deferred_xmit)
535 kfree_skb(skb);
536 return NETDEV_TX_OK;
537 }
538
539 return dsa_enqueue_skb(nskb, dev);
540 }
541
542 void *dsa_defer_xmit(struct sk_buff *skb, struct net_device *dev)
543 {
544 struct dsa_port *dp = dsa_slave_to_port(dev);
545
546 DSA_SKB_CB(skb)->deferred_xmit = true;
547
548 skb_queue_tail(&dp->xmit_queue, skb);
549 schedule_work(&dp->xmit_work);
550 return NULL;
551 }
552 EXPORT_SYMBOL_GPL(dsa_defer_xmit);
553
554 static void dsa_port_xmit_work(struct work_struct *work)
555 {
556 struct dsa_port *dp = container_of(work, struct dsa_port, xmit_work);
557 struct dsa_switch *ds = dp->ds;
558 struct sk_buff *skb;
559
560 if (unlikely(!ds->ops->port_deferred_xmit))
561 return;
562
563 while ((skb = skb_dequeue(&dp->xmit_queue)) != NULL)
564 ds->ops->port_deferred_xmit(ds, dp->index, skb);
565 }
566
567 /* ethtool operations *******************************************************/
568
569 static void dsa_slave_get_drvinfo(struct net_device *dev,
570 struct ethtool_drvinfo *drvinfo)
571 {
572 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
573 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
574 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
575 }
576
577 static int dsa_slave_get_regs_len(struct net_device *dev)
578 {
579 struct dsa_port *dp = dsa_slave_to_port(dev);
580 struct dsa_switch *ds = dp->ds;
581
582 if (ds->ops->get_regs_len)
583 return ds->ops->get_regs_len(ds, dp->index);
584
585 return -EOPNOTSUPP;
586 }
587
588 static void
589 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
590 {
591 struct dsa_port *dp = dsa_slave_to_port(dev);
592 struct dsa_switch *ds = dp->ds;
593
594 if (ds->ops->get_regs)
595 ds->ops->get_regs(ds, dp->index, regs, _p);
596 }
597
598 static int dsa_slave_nway_reset(struct net_device *dev)
599 {
600 struct dsa_port *dp = dsa_slave_to_port(dev);
601
602 return phylink_ethtool_nway_reset(dp->pl);
603 }
604
605 static int dsa_slave_get_eeprom_len(struct net_device *dev)
606 {
607 struct dsa_port *dp = dsa_slave_to_port(dev);
608 struct dsa_switch *ds = dp->ds;
609
610 if (ds->cd && ds->cd->eeprom_len)
611 return ds->cd->eeprom_len;
612
613 if (ds->ops->get_eeprom_len)
614 return ds->ops->get_eeprom_len(ds);
615
616 return 0;
617 }
618
619 static int dsa_slave_get_eeprom(struct net_device *dev,
620 struct ethtool_eeprom *eeprom, u8 *data)
621 {
622 struct dsa_port *dp = dsa_slave_to_port(dev);
623 struct dsa_switch *ds = dp->ds;
624
625 if (ds->ops->get_eeprom)
626 return ds->ops->get_eeprom(ds, eeprom, data);
627
628 return -EOPNOTSUPP;
629 }
630
631 static int dsa_slave_set_eeprom(struct net_device *dev,
632 struct ethtool_eeprom *eeprom, u8 *data)
633 {
634 struct dsa_port *dp = dsa_slave_to_port(dev);
635 struct dsa_switch *ds = dp->ds;
636
637 if (ds->ops->set_eeprom)
638 return ds->ops->set_eeprom(ds, eeprom, data);
639
640 return -EOPNOTSUPP;
641 }
642
643 static void dsa_slave_get_strings(struct net_device *dev,
644 uint32_t stringset, uint8_t *data)
645 {
646 struct dsa_port *dp = dsa_slave_to_port(dev);
647 struct dsa_switch *ds = dp->ds;
648
649 if (stringset == ETH_SS_STATS) {
650 int len = ETH_GSTRING_LEN;
651
652 strncpy(data, "tx_packets", len);
653 strncpy(data + len, "tx_bytes", len);
654 strncpy(data + 2 * len, "rx_packets", len);
655 strncpy(data + 3 * len, "rx_bytes", len);
656 if (ds->ops->get_strings)
657 ds->ops->get_strings(ds, dp->index, stringset,
658 data + 4 * len);
659 }
660 }
661
662 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
663 struct ethtool_stats *stats,
664 uint64_t *data)
665 {
666 struct dsa_port *dp = dsa_slave_to_port(dev);
667 struct dsa_slave_priv *p = netdev_priv(dev);
668 struct dsa_switch *ds = dp->ds;
669 struct pcpu_sw_netstats *s;
670 unsigned int start;
671 int i;
672
673 for_each_possible_cpu(i) {
674 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
675
676 s = per_cpu_ptr(p->stats64, i);
677 do {
678 start = u64_stats_fetch_begin_irq(&s->syncp);
679 tx_packets = s->tx_packets;
680 tx_bytes = s->tx_bytes;
681 rx_packets = s->rx_packets;
682 rx_bytes = s->rx_bytes;
683 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
684 data[0] += tx_packets;
685 data[1] += tx_bytes;
686 data[2] += rx_packets;
687 data[3] += rx_bytes;
688 }
689 if (ds->ops->get_ethtool_stats)
690 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
691 }
692
693 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
694 {
695 struct dsa_port *dp = dsa_slave_to_port(dev);
696 struct dsa_switch *ds = dp->ds;
697
698 if (sset == ETH_SS_STATS) {
699 int count;
700
701 count = 4;
702 if (ds->ops->get_sset_count)
703 count += ds->ops->get_sset_count(ds, dp->index, sset);
704
705 return count;
706 }
707
708 return -EOPNOTSUPP;
709 }
710
711 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
712 {
713 struct dsa_port *dp = dsa_slave_to_port(dev);
714 struct dsa_switch *ds = dp->ds;
715
716 phylink_ethtool_get_wol(dp->pl, w);
717
718 if (ds->ops->get_wol)
719 ds->ops->get_wol(ds, dp->index, w);
720 }
721
722 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
723 {
724 struct dsa_port *dp = dsa_slave_to_port(dev);
725 struct dsa_switch *ds = dp->ds;
726 int ret = -EOPNOTSUPP;
727
728 phylink_ethtool_set_wol(dp->pl, w);
729
730 if (ds->ops->set_wol)
731 ret = ds->ops->set_wol(ds, dp->index, w);
732
733 return ret;
734 }
735
736 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
737 {
738 struct dsa_port *dp = dsa_slave_to_port(dev);
739 struct dsa_switch *ds = dp->ds;
740 int ret;
741
742 /* Port's PHY and MAC both need to be EEE capable */
743 if (!dev->phydev || !dp->pl)
744 return -ENODEV;
745
746 if (!ds->ops->set_mac_eee)
747 return -EOPNOTSUPP;
748
749 ret = ds->ops->set_mac_eee(ds, dp->index, e);
750 if (ret)
751 return ret;
752
753 return phylink_ethtool_set_eee(dp->pl, e);
754 }
755
756 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
757 {
758 struct dsa_port *dp = dsa_slave_to_port(dev);
759 struct dsa_switch *ds = dp->ds;
760 int ret;
761
762 /* Port's PHY and MAC both need to be EEE capable */
763 if (!dev->phydev || !dp->pl)
764 return -ENODEV;
765
766 if (!ds->ops->get_mac_eee)
767 return -EOPNOTSUPP;
768
769 ret = ds->ops->get_mac_eee(ds, dp->index, e);
770 if (ret)
771 return ret;
772
773 return phylink_ethtool_get_eee(dp->pl, e);
774 }
775
776 static int dsa_slave_get_link_ksettings(struct net_device *dev,
777 struct ethtool_link_ksettings *cmd)
778 {
779 struct dsa_port *dp = dsa_slave_to_port(dev);
780
781 return phylink_ethtool_ksettings_get(dp->pl, cmd);
782 }
783
784 static int dsa_slave_set_link_ksettings(struct net_device *dev,
785 const struct ethtool_link_ksettings *cmd)
786 {
787 struct dsa_port *dp = dsa_slave_to_port(dev);
788
789 return phylink_ethtool_ksettings_set(dp->pl, cmd);
790 }
791
792 static void dsa_slave_get_pauseparam(struct net_device *dev,
793 struct ethtool_pauseparam *pause)
794 {
795 struct dsa_port *dp = dsa_slave_to_port(dev);
796
797 phylink_ethtool_get_pauseparam(dp->pl, pause);
798 }
799
800 static int dsa_slave_set_pauseparam(struct net_device *dev,
801 struct ethtool_pauseparam *pause)
802 {
803 struct dsa_port *dp = dsa_slave_to_port(dev);
804
805 return phylink_ethtool_set_pauseparam(dp->pl, pause);
806 }
807
808 #ifdef CONFIG_NET_POLL_CONTROLLER
809 static int dsa_slave_netpoll_setup(struct net_device *dev,
810 struct netpoll_info *ni)
811 {
812 struct net_device *master = dsa_slave_to_master(dev);
813 struct dsa_slave_priv *p = netdev_priv(dev);
814 struct netpoll *netpoll;
815 int err = 0;
816
817 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
818 if (!netpoll)
819 return -ENOMEM;
820
821 err = __netpoll_setup(netpoll, master);
822 if (err) {
823 kfree(netpoll);
824 goto out;
825 }
826
827 p->netpoll = netpoll;
828 out:
829 return err;
830 }
831
832 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
833 {
834 struct dsa_slave_priv *p = netdev_priv(dev);
835 struct netpoll *netpoll = p->netpoll;
836
837 if (!netpoll)
838 return;
839
840 p->netpoll = NULL;
841
842 __netpoll_free(netpoll);
843 }
844
845 static void dsa_slave_poll_controller(struct net_device *dev)
846 {
847 }
848 #endif
849
850 static int dsa_slave_get_phys_port_name(struct net_device *dev,
851 char *name, size_t len)
852 {
853 struct dsa_port *dp = dsa_slave_to_port(dev);
854
855 /* For non-legacy ports, devlink is used and it takes
856 * care of the name generation. This ndo implementation
857 * should be removed with legacy support.
858 */
859 if (dp->ds->devlink)
860 return -EOPNOTSUPP;
861
862 if (snprintf(name, len, "p%d", dp->index) >= len)
863 return -EINVAL;
864
865 return 0;
866 }
867
868 static struct dsa_mall_tc_entry *
869 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
870 {
871 struct dsa_slave_priv *p = netdev_priv(dev);
872 struct dsa_mall_tc_entry *mall_tc_entry;
873
874 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
875 if (mall_tc_entry->cookie == cookie)
876 return mall_tc_entry;
877
878 return NULL;
879 }
880
881 static int dsa_slave_add_cls_matchall(struct net_device *dev,
882 struct tc_cls_matchall_offload *cls,
883 bool ingress)
884 {
885 struct dsa_port *dp = dsa_slave_to_port(dev);
886 struct dsa_slave_priv *p = netdev_priv(dev);
887 struct dsa_mall_tc_entry *mall_tc_entry;
888 __be16 protocol = cls->common.protocol;
889 struct dsa_switch *ds = dp->ds;
890 struct flow_action_entry *act;
891 struct dsa_port *to_dp;
892 int err = -EOPNOTSUPP;
893
894 if (!ds->ops->port_mirror_add)
895 return err;
896
897 if (!flow_offload_has_one_action(&cls->rule->action))
898 return err;
899
900 act = &cls->rule->action.entries[0];
901
902 if (act->id == FLOW_ACTION_MIRRED && protocol == htons(ETH_P_ALL)) {
903 struct dsa_mall_mirror_tc_entry *mirror;
904
905 if (!act->dev)
906 return -EINVAL;
907
908 if (!dsa_slave_dev_check(act->dev))
909 return -EOPNOTSUPP;
910
911 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
912 if (!mall_tc_entry)
913 return -ENOMEM;
914
915 mall_tc_entry->cookie = cls->cookie;
916 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
917 mirror = &mall_tc_entry->mirror;
918
919 to_dp = dsa_slave_to_port(act->dev);
920
921 mirror->to_local_port = to_dp->index;
922 mirror->ingress = ingress;
923
924 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
925 if (err) {
926 kfree(mall_tc_entry);
927 return err;
928 }
929
930 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
931 }
932
933 return 0;
934 }
935
936 static void dsa_slave_del_cls_matchall(struct net_device *dev,
937 struct tc_cls_matchall_offload *cls)
938 {
939 struct dsa_port *dp = dsa_slave_to_port(dev);
940 struct dsa_mall_tc_entry *mall_tc_entry;
941 struct dsa_switch *ds = dp->ds;
942
943 if (!ds->ops->port_mirror_del)
944 return;
945
946 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
947 if (!mall_tc_entry)
948 return;
949
950 list_del(&mall_tc_entry->list);
951
952 switch (mall_tc_entry->type) {
953 case DSA_PORT_MALL_MIRROR:
954 ds->ops->port_mirror_del(ds, dp->index, &mall_tc_entry->mirror);
955 break;
956 default:
957 WARN_ON(1);
958 }
959
960 kfree(mall_tc_entry);
961 }
962
963 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
964 struct tc_cls_matchall_offload *cls,
965 bool ingress)
966 {
967 if (cls->common.chain_index)
968 return -EOPNOTSUPP;
969
970 switch (cls->command) {
971 case TC_CLSMATCHALL_REPLACE:
972 return dsa_slave_add_cls_matchall(dev, cls, ingress);
973 case TC_CLSMATCHALL_DESTROY:
974 dsa_slave_del_cls_matchall(dev, cls);
975 return 0;
976 default:
977 return -EOPNOTSUPP;
978 }
979 }
980
981 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
982 void *cb_priv, bool ingress)
983 {
984 struct net_device *dev = cb_priv;
985
986 if (!tc_can_offload(dev))
987 return -EOPNOTSUPP;
988
989 switch (type) {
990 case TC_SETUP_CLSMATCHALL:
991 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
992 default:
993 return -EOPNOTSUPP;
994 }
995 }
996
997 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
998 void *type_data, void *cb_priv)
999 {
1000 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
1001 }
1002
1003 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
1004 void *type_data, void *cb_priv)
1005 {
1006 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
1007 }
1008
1009 static LIST_HEAD(dsa_slave_block_cb_list);
1010
1011 static int dsa_slave_setup_tc_block(struct net_device *dev,
1012 struct flow_block_offload *f)
1013 {
1014 struct flow_block_cb *block_cb;
1015 flow_setup_cb_t *cb;
1016
1017 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
1018 cb = dsa_slave_setup_tc_block_cb_ig;
1019 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
1020 cb = dsa_slave_setup_tc_block_cb_eg;
1021 else
1022 return -EOPNOTSUPP;
1023
1024 f->driver_block_list = &dsa_slave_block_cb_list;
1025
1026 switch (f->command) {
1027 case FLOW_BLOCK_BIND:
1028 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list))
1029 return -EBUSY;
1030
1031 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL);
1032 if (IS_ERR(block_cb))
1033 return PTR_ERR(block_cb);
1034
1035 flow_block_cb_add(block_cb, f);
1036 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list);
1037 return 0;
1038 case FLOW_BLOCK_UNBIND:
1039 block_cb = flow_block_cb_lookup(f->block, cb, dev);
1040 if (!block_cb)
1041 return -ENOENT;
1042
1043 flow_block_cb_remove(block_cb, f);
1044 list_del(&block_cb->driver_list);
1045 return 0;
1046 default:
1047 return -EOPNOTSUPP;
1048 }
1049 }
1050
1051 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
1052 void *type_data)
1053 {
1054 struct dsa_port *dp = dsa_slave_to_port(dev);
1055 struct dsa_switch *ds = dp->ds;
1056
1057 if (type == TC_SETUP_BLOCK)
1058 return dsa_slave_setup_tc_block(dev, type_data);
1059
1060 if (!ds->ops->port_setup_tc)
1061 return -EOPNOTSUPP;
1062
1063 return ds->ops->port_setup_tc(ds, dp->index, type, type_data);
1064 }
1065
1066 static void dsa_slave_get_stats64(struct net_device *dev,
1067 struct rtnl_link_stats64 *stats)
1068 {
1069 struct dsa_slave_priv *p = netdev_priv(dev);
1070 struct pcpu_sw_netstats *s;
1071 unsigned int start;
1072 int i;
1073
1074 netdev_stats_to_stats64(stats, &dev->stats);
1075 for_each_possible_cpu(i) {
1076 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
1077
1078 s = per_cpu_ptr(p->stats64, i);
1079 do {
1080 start = u64_stats_fetch_begin_irq(&s->syncp);
1081 tx_packets = s->tx_packets;
1082 tx_bytes = s->tx_bytes;
1083 rx_packets = s->rx_packets;
1084 rx_bytes = s->rx_bytes;
1085 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
1086
1087 stats->tx_packets += tx_packets;
1088 stats->tx_bytes += tx_bytes;
1089 stats->rx_packets += rx_packets;
1090 stats->rx_bytes += rx_bytes;
1091 }
1092 }
1093
1094 static int dsa_slave_get_rxnfc(struct net_device *dev,
1095 struct ethtool_rxnfc *nfc, u32 *rule_locs)
1096 {
1097 struct dsa_port *dp = dsa_slave_to_port(dev);
1098 struct dsa_switch *ds = dp->ds;
1099
1100 if (!ds->ops->get_rxnfc)
1101 return -EOPNOTSUPP;
1102
1103 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
1104 }
1105
1106 static int dsa_slave_set_rxnfc(struct net_device *dev,
1107 struct ethtool_rxnfc *nfc)
1108 {
1109 struct dsa_port *dp = dsa_slave_to_port(dev);
1110 struct dsa_switch *ds = dp->ds;
1111
1112 if (!ds->ops->set_rxnfc)
1113 return -EOPNOTSUPP;
1114
1115 return ds->ops->set_rxnfc(ds, dp->index, nfc);
1116 }
1117
1118 static int dsa_slave_get_ts_info(struct net_device *dev,
1119 struct ethtool_ts_info *ts)
1120 {
1121 struct dsa_slave_priv *p = netdev_priv(dev);
1122 struct dsa_switch *ds = p->dp->ds;
1123
1124 if (!ds->ops->get_ts_info)
1125 return -EOPNOTSUPP;
1126
1127 return ds->ops->get_ts_info(ds, p->dp->index, ts);
1128 }
1129
1130 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
1131 u16 vid)
1132 {
1133 struct dsa_port *dp = dsa_slave_to_port(dev);
1134 struct bridge_vlan_info info;
1135 int ret;
1136
1137 /* Check for a possible bridge VLAN entry now since there is no
1138 * need to emulate the switchdev prepare + commit phase.
1139 */
1140 if (dp->bridge_dev) {
1141 if (!br_vlan_enabled(dp->bridge_dev))
1142 return 0;
1143
1144 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
1145 * device, respectively the VID is not found, returning
1146 * 0 means success, which is a failure for us here.
1147 */
1148 ret = br_vlan_get_info(dp->bridge_dev, vid, &info);
1149 if (ret == 0)
1150 return -EBUSY;
1151 }
1152
1153 ret = dsa_port_vid_add(dp, vid, 0);
1154 if (ret)
1155 return ret;
1156
1157 ret = dsa_port_vid_add(dp->cpu_dp, vid, 0);
1158 if (ret)
1159 return ret;
1160
1161 return 0;
1162 }
1163
1164 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
1165 u16 vid)
1166 {
1167 struct dsa_port *dp = dsa_slave_to_port(dev);
1168 struct bridge_vlan_info info;
1169 int ret;
1170
1171 /* Check for a possible bridge VLAN entry now since there is no
1172 * need to emulate the switchdev prepare + commit phase.
1173 */
1174 if (dp->bridge_dev) {
1175 if (!br_vlan_enabled(dp->bridge_dev))
1176 return 0;
1177
1178 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
1179 * device, respectively the VID is not found, returning
1180 * 0 means success, which is a failure for us here.
1181 */
1182 ret = br_vlan_get_info(dp->bridge_dev, vid, &info);
1183 if (ret == 0)
1184 return -EBUSY;
1185 }
1186
1187 /* Do not deprogram the CPU port as it may be shared with other user
1188 * ports which can be members of this VLAN as well.
1189 */
1190 return dsa_port_vid_del(dp, vid);
1191 }
1192
1193 static const struct ethtool_ops dsa_slave_ethtool_ops = {
1194 .get_drvinfo = dsa_slave_get_drvinfo,
1195 .get_regs_len = dsa_slave_get_regs_len,
1196 .get_regs = dsa_slave_get_regs,
1197 .nway_reset = dsa_slave_nway_reset,
1198 .get_link = ethtool_op_get_link,
1199 .get_eeprom_len = dsa_slave_get_eeprom_len,
1200 .get_eeprom = dsa_slave_get_eeprom,
1201 .set_eeprom = dsa_slave_set_eeprom,
1202 .get_strings = dsa_slave_get_strings,
1203 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
1204 .get_sset_count = dsa_slave_get_sset_count,
1205 .set_wol = dsa_slave_set_wol,
1206 .get_wol = dsa_slave_get_wol,
1207 .set_eee = dsa_slave_set_eee,
1208 .get_eee = dsa_slave_get_eee,
1209 .get_link_ksettings = dsa_slave_get_link_ksettings,
1210 .set_link_ksettings = dsa_slave_set_link_ksettings,
1211 .get_pauseparam = dsa_slave_get_pauseparam,
1212 .set_pauseparam = dsa_slave_set_pauseparam,
1213 .get_rxnfc = dsa_slave_get_rxnfc,
1214 .set_rxnfc = dsa_slave_set_rxnfc,
1215 .get_ts_info = dsa_slave_get_ts_info,
1216 };
1217
1218 /* legacy way, bypassing the bridge *****************************************/
1219 int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
1220 struct net_device *dev,
1221 const unsigned char *addr, u16 vid,
1222 u16 flags,
1223 struct netlink_ext_ack *extack)
1224 {
1225 struct dsa_port *dp = dsa_slave_to_port(dev);
1226
1227 return dsa_port_fdb_add(dp, addr, vid);
1228 }
1229
1230 int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
1231 struct net_device *dev,
1232 const unsigned char *addr, u16 vid)
1233 {
1234 struct dsa_port *dp = dsa_slave_to_port(dev);
1235
1236 return dsa_port_fdb_del(dp, addr, vid);
1237 }
1238
1239 static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
1240 {
1241 struct dsa_port *dp = dsa_slave_to_port(dev);
1242
1243 return dp->ds->devlink ? &dp->devlink_port : NULL;
1244 }
1245
1246 static const struct net_device_ops dsa_slave_netdev_ops = {
1247 .ndo_open = dsa_slave_open,
1248 .ndo_stop = dsa_slave_close,
1249 .ndo_start_xmit = dsa_slave_xmit,
1250 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
1251 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
1252 .ndo_set_mac_address = dsa_slave_set_mac_address,
1253 .ndo_fdb_add = dsa_legacy_fdb_add,
1254 .ndo_fdb_del = dsa_legacy_fdb_del,
1255 .ndo_fdb_dump = dsa_slave_fdb_dump,
1256 .ndo_do_ioctl = dsa_slave_ioctl,
1257 .ndo_get_iflink = dsa_slave_get_iflink,
1258 #ifdef CONFIG_NET_POLL_CONTROLLER
1259 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
1260 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
1261 .ndo_poll_controller = dsa_slave_poll_controller,
1262 #endif
1263 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
1264 .ndo_setup_tc = dsa_slave_setup_tc,
1265 .ndo_get_stats64 = dsa_slave_get_stats64,
1266 .ndo_get_port_parent_id = dsa_slave_get_port_parent_id,
1267 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
1268 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
1269 .ndo_get_devlink_port = dsa_slave_get_devlink_port,
1270 };
1271
1272 static struct device_type dsa_type = {
1273 .name = "dsa",
1274 };
1275
1276 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
1277 {
1278 const struct dsa_port *dp = dsa_to_port(ds, port);
1279
1280 phylink_mac_change(dp->pl, up);
1281 }
1282 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
1283
1284 static void dsa_slave_phylink_fixed_state(struct net_device *dev,
1285 struct phylink_link_state *state)
1286 {
1287 struct dsa_port *dp = dsa_slave_to_port(dev);
1288 struct dsa_switch *ds = dp->ds;
1289
1290 /* No need to check that this operation is valid, the callback would
1291 * not be called if it was not.
1292 */
1293 ds->ops->phylink_fixed_state(ds, dp->index, state);
1294 }
1295
1296 /* slave device setup *******************************************************/
1297 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
1298 {
1299 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1300 struct dsa_switch *ds = dp->ds;
1301
1302 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
1303 if (!slave_dev->phydev) {
1304 netdev_err(slave_dev, "no phy at %d\n", addr);
1305 return -ENODEV;
1306 }
1307
1308 return phylink_connect_phy(dp->pl, slave_dev->phydev);
1309 }
1310
1311 static int dsa_slave_phy_setup(struct net_device *slave_dev)
1312 {
1313 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1314 struct device_node *port_dn = dp->dn;
1315 struct dsa_switch *ds = dp->ds;
1316 phy_interface_t mode;
1317 u32 phy_flags = 0;
1318 int ret;
1319
1320 ret = of_get_phy_mode(port_dn, &mode);
1321 if (ret)
1322 mode = PHY_INTERFACE_MODE_NA;
1323
1324 dp->pl_config.dev = &slave_dev->dev;
1325 dp->pl_config.type = PHYLINK_NETDEV;
1326
1327 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode,
1328 &dsa_port_phylink_mac_ops);
1329 if (IS_ERR(dp->pl)) {
1330 netdev_err(slave_dev,
1331 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1332 return PTR_ERR(dp->pl);
1333 }
1334
1335 /* Register only if the switch provides such a callback, since this
1336 * callback takes precedence over polling the link GPIO in PHYLINK
1337 * (see phylink_get_fixed_state).
1338 */
1339 if (ds->ops->phylink_fixed_state)
1340 phylink_fixed_state_cb(dp->pl, dsa_slave_phylink_fixed_state);
1341
1342 if (ds->ops->get_phy_flags)
1343 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
1344
1345 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
1346 if (ret == -ENODEV && ds->slave_mii_bus) {
1347 /* We could not connect to a designated PHY or SFP, so try to
1348 * use the switch internal MDIO bus instead
1349 */
1350 ret = dsa_slave_phy_connect(slave_dev, dp->index);
1351 if (ret) {
1352 netdev_err(slave_dev,
1353 "failed to connect to port %d: %d\n",
1354 dp->index, ret);
1355 phylink_destroy(dp->pl);
1356 return ret;
1357 }
1358 }
1359
1360 return ret;
1361 }
1362
1363 int dsa_slave_suspend(struct net_device *slave_dev)
1364 {
1365 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1366
1367 if (!netif_running(slave_dev))
1368 return 0;
1369
1370 cancel_work_sync(&dp->xmit_work);
1371 skb_queue_purge(&dp->xmit_queue);
1372
1373 netif_device_detach(slave_dev);
1374
1375 rtnl_lock();
1376 phylink_stop(dp->pl);
1377 rtnl_unlock();
1378
1379 return 0;
1380 }
1381
1382 int dsa_slave_resume(struct net_device *slave_dev)
1383 {
1384 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1385
1386 if (!netif_running(slave_dev))
1387 return 0;
1388
1389 netif_device_attach(slave_dev);
1390
1391 rtnl_lock();
1392 phylink_start(dp->pl);
1393 rtnl_unlock();
1394
1395 return 0;
1396 }
1397
1398 static void dsa_slave_notify(struct net_device *dev, unsigned long val)
1399 {
1400 struct net_device *master = dsa_slave_to_master(dev);
1401 struct dsa_port *dp = dsa_slave_to_port(dev);
1402 struct dsa_notifier_register_info rinfo = {
1403 .switch_number = dp->ds->index,
1404 .port_number = dp->index,
1405 .master = master,
1406 .info.dev = dev,
1407 };
1408
1409 call_dsa_notifiers(val, dev, &rinfo.info);
1410 }
1411
1412 int dsa_slave_create(struct dsa_port *port)
1413 {
1414 const struct dsa_port *cpu_dp = port->cpu_dp;
1415 struct net_device *master = cpu_dp->master;
1416 struct dsa_switch *ds = port->ds;
1417 const char *name = port->name;
1418 struct net_device *slave_dev;
1419 struct dsa_slave_priv *p;
1420 int ret;
1421
1422 if (!ds->num_tx_queues)
1423 ds->num_tx_queues = 1;
1424
1425 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
1426 NET_NAME_UNKNOWN, ether_setup,
1427 ds->num_tx_queues, 1);
1428 if (slave_dev == NULL)
1429 return -ENOMEM;
1430
1431 slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
1432 if (ds->ops->port_vlan_add && ds->ops->port_vlan_del)
1433 slave_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1434 slave_dev->hw_features |= NETIF_F_HW_TC;
1435 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1436 if (!IS_ERR_OR_NULL(port->mac))
1437 ether_addr_copy(slave_dev->dev_addr, port->mac);
1438 else
1439 eth_hw_addr_inherit(slave_dev, master);
1440 slave_dev->priv_flags |= IFF_NO_QUEUE;
1441 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1442 slave_dev->min_mtu = 0;
1443 slave_dev->max_mtu = ETH_MAX_MTU;
1444 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1445
1446 SET_NETDEV_DEV(slave_dev, port->ds->dev);
1447 slave_dev->dev.of_node = port->dn;
1448 slave_dev->vlan_features = master->vlan_features;
1449
1450 p = netdev_priv(slave_dev);
1451 p->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1452 if (!p->stats64) {
1453 free_netdev(slave_dev);
1454 return -ENOMEM;
1455 }
1456 p->dp = port;
1457 INIT_LIST_HEAD(&p->mall_tc_list);
1458 INIT_WORK(&port->xmit_work, dsa_port_xmit_work);
1459 skb_queue_head_init(&port->xmit_queue);
1460 p->xmit = cpu_dp->tag_ops->xmit;
1461 port->slave = slave_dev;
1462
1463 netif_carrier_off(slave_dev);
1464
1465 ret = dsa_slave_phy_setup(slave_dev);
1466 if (ret) {
1467 netdev_err(master, "error %d setting up slave phy\n", ret);
1468 goto out_free;
1469 }
1470
1471 dsa_slave_notify(slave_dev, DSA_PORT_REGISTER);
1472
1473 ret = register_netdev(slave_dev);
1474 if (ret) {
1475 netdev_err(master, "error %d registering interface %s\n",
1476 ret, slave_dev->name);
1477 goto out_phy;
1478 }
1479
1480 return 0;
1481
1482 out_phy:
1483 rtnl_lock();
1484 phylink_disconnect_phy(p->dp->pl);
1485 rtnl_unlock();
1486 phylink_destroy(p->dp->pl);
1487 out_free:
1488 free_percpu(p->stats64);
1489 free_netdev(slave_dev);
1490 port->slave = NULL;
1491 return ret;
1492 }
1493
1494 void dsa_slave_destroy(struct net_device *slave_dev)
1495 {
1496 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1497 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1498
1499 netif_carrier_off(slave_dev);
1500 rtnl_lock();
1501 phylink_disconnect_phy(dp->pl);
1502 rtnl_unlock();
1503
1504 dsa_slave_notify(slave_dev, DSA_PORT_UNREGISTER);
1505 unregister_netdev(slave_dev);
1506 phylink_destroy(dp->pl);
1507 free_percpu(p->stats64);
1508 free_netdev(slave_dev);
1509 }
1510
1511 static bool dsa_slave_dev_check(const struct net_device *dev)
1512 {
1513 return dev->netdev_ops == &dsa_slave_netdev_ops;
1514 }
1515
1516 static int dsa_slave_changeupper(struct net_device *dev,
1517 struct netdev_notifier_changeupper_info *info)
1518 {
1519 struct dsa_port *dp = dsa_slave_to_port(dev);
1520 int err = NOTIFY_DONE;
1521
1522 if (netif_is_bridge_master(info->upper_dev)) {
1523 if (info->linking) {
1524 err = dsa_port_bridge_join(dp, info->upper_dev);
1525 err = notifier_from_errno(err);
1526 } else {
1527 dsa_port_bridge_leave(dp, info->upper_dev);
1528 err = NOTIFY_OK;
1529 }
1530 }
1531
1532 return err;
1533 }
1534
1535 static int dsa_slave_upper_vlan_check(struct net_device *dev,
1536 struct netdev_notifier_changeupper_info *
1537 info)
1538 {
1539 struct netlink_ext_ack *ext_ack;
1540 struct net_device *slave;
1541 struct dsa_port *dp;
1542
1543 ext_ack = netdev_notifier_info_to_extack(&info->info);
1544
1545 if (!is_vlan_dev(dev))
1546 return NOTIFY_DONE;
1547
1548 slave = vlan_dev_real_dev(dev);
1549 if (!dsa_slave_dev_check(slave))
1550 return NOTIFY_DONE;
1551
1552 dp = dsa_slave_to_port(slave);
1553 if (!dp->bridge_dev)
1554 return NOTIFY_DONE;
1555
1556 /* Deny enslaving a VLAN device into a VLAN-aware bridge */
1557 if (br_vlan_enabled(dp->bridge_dev) &&
1558 netif_is_bridge_master(info->upper_dev) && info->linking) {
1559 NL_SET_ERR_MSG_MOD(ext_ack,
1560 "Cannot enslave VLAN device into VLAN aware bridge");
1561 return notifier_from_errno(-EINVAL);
1562 }
1563
1564 return NOTIFY_DONE;
1565 }
1566
1567 static int dsa_slave_netdevice_event(struct notifier_block *nb,
1568 unsigned long event, void *ptr)
1569 {
1570 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1571
1572 if (event == NETDEV_CHANGEUPPER) {
1573 if (!dsa_slave_dev_check(dev))
1574 return dsa_slave_upper_vlan_check(dev, ptr);
1575
1576 return dsa_slave_changeupper(dev, ptr);
1577 }
1578
1579 return NOTIFY_DONE;
1580 }
1581
1582 struct dsa_switchdev_event_work {
1583 struct work_struct work;
1584 struct switchdev_notifier_fdb_info fdb_info;
1585 struct net_device *dev;
1586 unsigned long event;
1587 };
1588
1589 static void dsa_slave_switchdev_event_work(struct work_struct *work)
1590 {
1591 struct dsa_switchdev_event_work *switchdev_work =
1592 container_of(work, struct dsa_switchdev_event_work, work);
1593 struct net_device *dev = switchdev_work->dev;
1594 struct switchdev_notifier_fdb_info *fdb_info;
1595 struct dsa_port *dp = dsa_slave_to_port(dev);
1596 int err;
1597
1598 rtnl_lock();
1599 switch (switchdev_work->event) {
1600 case SWITCHDEV_FDB_ADD_TO_DEVICE:
1601 fdb_info = &switchdev_work->fdb_info;
1602 if (!fdb_info->added_by_user)
1603 break;
1604
1605 err = dsa_port_fdb_add(dp, fdb_info->addr, fdb_info->vid);
1606 if (err) {
1607 netdev_dbg(dev, "fdb add failed err=%d\n", err);
1608 break;
1609 }
1610 fdb_info->offloaded = true;
1611 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, dev,
1612 &fdb_info->info, NULL);
1613 break;
1614
1615 case SWITCHDEV_FDB_DEL_TO_DEVICE:
1616 fdb_info = &switchdev_work->fdb_info;
1617 if (!fdb_info->added_by_user)
1618 break;
1619
1620 err = dsa_port_fdb_del(dp, fdb_info->addr, fdb_info->vid);
1621 if (err) {
1622 netdev_dbg(dev, "fdb del failed err=%d\n", err);
1623 dev_close(dev);
1624 }
1625 break;
1626 }
1627 rtnl_unlock();
1628
1629 kfree(switchdev_work->fdb_info.addr);
1630 kfree(switchdev_work);
1631 dev_put(dev);
1632 }
1633
1634 static int
1635 dsa_slave_switchdev_fdb_work_init(struct dsa_switchdev_event_work *
1636 switchdev_work,
1637 const struct switchdev_notifier_fdb_info *
1638 fdb_info)
1639 {
1640 memcpy(&switchdev_work->fdb_info, fdb_info,
1641 sizeof(switchdev_work->fdb_info));
1642 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
1643 if (!switchdev_work->fdb_info.addr)
1644 return -ENOMEM;
1645 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
1646 fdb_info->addr);
1647 return 0;
1648 }
1649
1650 /* Called under rcu_read_lock() */
1651 static int dsa_slave_switchdev_event(struct notifier_block *unused,
1652 unsigned long event, void *ptr)
1653 {
1654 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
1655 struct dsa_switchdev_event_work *switchdev_work;
1656 int err;
1657
1658 if (event == SWITCHDEV_PORT_ATTR_SET) {
1659 err = switchdev_handle_port_attr_set(dev, ptr,
1660 dsa_slave_dev_check,
1661 dsa_slave_port_attr_set);
1662 return notifier_from_errno(err);
1663 }
1664
1665 if (!dsa_slave_dev_check(dev))
1666 return NOTIFY_DONE;
1667
1668 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
1669 if (!switchdev_work)
1670 return NOTIFY_BAD;
1671
1672 INIT_WORK(&switchdev_work->work,
1673 dsa_slave_switchdev_event_work);
1674 switchdev_work->dev = dev;
1675 switchdev_work->event = event;
1676
1677 switch (event) {
1678 case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */
1679 case SWITCHDEV_FDB_DEL_TO_DEVICE:
1680 if (dsa_slave_switchdev_fdb_work_init(switchdev_work, ptr))
1681 goto err_fdb_work_init;
1682 dev_hold(dev);
1683 break;
1684 default:
1685 kfree(switchdev_work);
1686 return NOTIFY_DONE;
1687 }
1688
1689 dsa_schedule_work(&switchdev_work->work);
1690 return NOTIFY_OK;
1691
1692 err_fdb_work_init:
1693 kfree(switchdev_work);
1694 return NOTIFY_BAD;
1695 }
1696
1697 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
1698 unsigned long event, void *ptr)
1699 {
1700 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
1701 int err;
1702
1703 switch (event) {
1704 case SWITCHDEV_PORT_OBJ_ADD:
1705 err = switchdev_handle_port_obj_add(dev, ptr,
1706 dsa_slave_dev_check,
1707 dsa_slave_port_obj_add);
1708 return notifier_from_errno(err);
1709 case SWITCHDEV_PORT_OBJ_DEL:
1710 err = switchdev_handle_port_obj_del(dev, ptr,
1711 dsa_slave_dev_check,
1712 dsa_slave_port_obj_del);
1713 return notifier_from_errno(err);
1714 case SWITCHDEV_PORT_ATTR_SET:
1715 err = switchdev_handle_port_attr_set(dev, ptr,
1716 dsa_slave_dev_check,
1717 dsa_slave_port_attr_set);
1718 return notifier_from_errno(err);
1719 }
1720
1721 return NOTIFY_DONE;
1722 }
1723
1724 static struct notifier_block dsa_slave_nb __read_mostly = {
1725 .notifier_call = dsa_slave_netdevice_event,
1726 };
1727
1728 static struct notifier_block dsa_slave_switchdev_notifier = {
1729 .notifier_call = dsa_slave_switchdev_event,
1730 };
1731
1732 static struct notifier_block dsa_slave_switchdev_blocking_notifier = {
1733 .notifier_call = dsa_slave_switchdev_blocking_event,
1734 };
1735
1736 int dsa_slave_register_notifier(void)
1737 {
1738 struct notifier_block *nb;
1739 int err;
1740
1741 err = register_netdevice_notifier(&dsa_slave_nb);
1742 if (err)
1743 return err;
1744
1745 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
1746 if (err)
1747 goto err_switchdev_nb;
1748
1749 nb = &dsa_slave_switchdev_blocking_notifier;
1750 err = register_switchdev_blocking_notifier(nb);
1751 if (err)
1752 goto err_switchdev_blocking_nb;
1753
1754 return 0;
1755
1756 err_switchdev_blocking_nb:
1757 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
1758 err_switchdev_nb:
1759 unregister_netdevice_notifier(&dsa_slave_nb);
1760 return err;
1761 }
1762
1763 void dsa_slave_unregister_notifier(void)
1764 {
1765 struct notifier_block *nb;
1766 int err;
1767
1768 nb = &dsa_slave_switchdev_blocking_notifier;
1769 err = unregister_switchdev_blocking_notifier(nb);
1770 if (err)
1771 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
1772
1773 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
1774 if (err)
1775 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
1776
1777 err = unregister_netdevice_notifier(&dsa_slave_nb);
1778 if (err)
1779 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
1780 }
Linux with added FPC-III support