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net: dsa: add support for switchdev FDB objects
[mirror_ubuntu-bionic-kernel.git] / net / dsa / slave.c
1 /*
2 * net/dsa/slave.c - Slave device handling
3 * Copyright (c) 2008-2009 Marvell Semiconductor
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10
11 #include <linux/list.h>
12 #include <linux/etherdevice.h>
13 #include <linux/netdevice.h>
14 #include <linux/phy.h>
15 #include <linux/phy_fixed.h>
16 #include <linux/of_net.h>
17 #include <linux/of_mdio.h>
18 #include <net/rtnetlink.h>
19 #include <net/switchdev.h>
20 #include <linux/if_bridge.h>
21 #include <linux/netpoll.h>
22 #include <linux/if_vlan.h>
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->drv->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->drv->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:%.2x",
53 ds->index, ds->pd->sw_addr);
54 ds->slave_mii_bus->parent = ds->master_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 struct dsa_slave_priv *p = netdev_priv(dev);
63
64 return p->parent->dst->master_netdev->ifindex;
65 }
66
67 static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p)
68 {
69 return !!p->bridge_dev;
70 }
71
72 static int dsa_slave_open(struct net_device *dev)
73 {
74 struct dsa_slave_priv *p = netdev_priv(dev);
75 struct net_device *master = p->parent->dst->master_netdev;
76 struct dsa_switch *ds = p->parent;
77 u8 stp_state = dsa_port_is_bridged(p) ?
78 BR_STATE_BLOCKING : BR_STATE_FORWARDING;
79 int err;
80
81 if (!(master->flags & IFF_UP))
82 return -ENETDOWN;
83
84 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
85 err = dev_uc_add(master, dev->dev_addr);
86 if (err < 0)
87 goto out;
88 }
89
90 if (dev->flags & IFF_ALLMULTI) {
91 err = dev_set_allmulti(master, 1);
92 if (err < 0)
93 goto del_unicast;
94 }
95 if (dev->flags & IFF_PROMISC) {
96 err = dev_set_promiscuity(master, 1);
97 if (err < 0)
98 goto clear_allmulti;
99 }
100
101 if (ds->drv->port_enable) {
102 err = ds->drv->port_enable(ds, p->port, p->phy);
103 if (err)
104 goto clear_promisc;
105 }
106
107 if (ds->drv->port_stp_update)
108 ds->drv->port_stp_update(ds, p->port, stp_state);
109
110 if (p->phy)
111 phy_start(p->phy);
112
113 return 0;
114
115 clear_promisc:
116 if (dev->flags & IFF_PROMISC)
117 dev_set_promiscuity(master, -1);
118 clear_allmulti:
119 if (dev->flags & IFF_ALLMULTI)
120 dev_set_allmulti(master, -1);
121 del_unicast:
122 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
123 dev_uc_del(master, dev->dev_addr);
124 out:
125 return err;
126 }
127
128 static int dsa_slave_close(struct net_device *dev)
129 {
130 struct dsa_slave_priv *p = netdev_priv(dev);
131 struct net_device *master = p->parent->dst->master_netdev;
132 struct dsa_switch *ds = p->parent;
133
134 if (p->phy)
135 phy_stop(p->phy);
136
137 dev_mc_unsync(master, dev);
138 dev_uc_unsync(master, dev);
139 if (dev->flags & IFF_ALLMULTI)
140 dev_set_allmulti(master, -1);
141 if (dev->flags & IFF_PROMISC)
142 dev_set_promiscuity(master, -1);
143
144 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
145 dev_uc_del(master, dev->dev_addr);
146
147 if (ds->drv->port_disable)
148 ds->drv->port_disable(ds, p->port, p->phy);
149
150 if (ds->drv->port_stp_update)
151 ds->drv->port_stp_update(ds, p->port, BR_STATE_DISABLED);
152
153 return 0;
154 }
155
156 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
157 {
158 struct dsa_slave_priv *p = netdev_priv(dev);
159 struct net_device *master = p->parent->dst->master_netdev;
160
161 if (change & IFF_ALLMULTI)
162 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
163 if (change & IFF_PROMISC)
164 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
165 }
166
167 static void dsa_slave_set_rx_mode(struct net_device *dev)
168 {
169 struct dsa_slave_priv *p = netdev_priv(dev);
170 struct net_device *master = p->parent->dst->master_netdev;
171
172 dev_mc_sync(master, dev);
173 dev_uc_sync(master, dev);
174 }
175
176 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
177 {
178 struct dsa_slave_priv *p = netdev_priv(dev);
179 struct net_device *master = p->parent->dst->master_netdev;
180 struct sockaddr *addr = a;
181 int err;
182
183 if (!is_valid_ether_addr(addr->sa_data))
184 return -EADDRNOTAVAIL;
185
186 if (!(dev->flags & IFF_UP))
187 goto out;
188
189 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
190 err = dev_uc_add(master, addr->sa_data);
191 if (err < 0)
192 return err;
193 }
194
195 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
196 dev_uc_del(master, dev->dev_addr);
197
198 out:
199 ether_addr_copy(dev->dev_addr, addr->sa_data);
200
201 return 0;
202 }
203
204 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
205 {
206 struct dsa_slave_priv *p = netdev_priv(dev);
207
208 if (p->phy != NULL)
209 return phy_mii_ioctl(p->phy, ifr, cmd);
210
211 return -EOPNOTSUPP;
212 }
213
214 /* Return a bitmask of all ports being currently bridged within a given bridge
215 * device. Note that on leave, the mask will still return the bitmask of ports
216 * currently bridged, prior to port removal, and this is exactly what we want.
217 */
218 static u32 dsa_slave_br_port_mask(struct dsa_switch *ds,
219 struct net_device *bridge)
220 {
221 struct dsa_slave_priv *p;
222 unsigned int port;
223 u32 mask = 0;
224
225 for (port = 0; port < DSA_MAX_PORTS; port++) {
226 if (!dsa_is_port_initialized(ds, port))
227 continue;
228
229 p = netdev_priv(ds->ports[port]);
230
231 if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT &&
232 p->bridge_dev == bridge)
233 mask |= 1 << port;
234 }
235
236 return mask;
237 }
238
239 static int dsa_slave_stp_update(struct net_device *dev, u8 state)
240 {
241 struct dsa_slave_priv *p = netdev_priv(dev);
242 struct dsa_switch *ds = p->parent;
243 int ret = -EOPNOTSUPP;
244
245 if (ds->drv->port_stp_update)
246 ret = ds->drv->port_stp_update(ds, p->port, state);
247
248 return ret;
249 }
250
251 static int dsa_slave_port_attr_set(struct net_device *dev,
252 struct switchdev_attr *attr)
253 {
254 int ret = 0;
255
256 switch (attr->id) {
257 case SWITCHDEV_ATTR_PORT_STP_STATE:
258 if (attr->trans == SWITCHDEV_TRANS_COMMIT)
259 ret = dsa_slave_stp_update(dev, attr->u.stp_state);
260 break;
261 default:
262 ret = -EOPNOTSUPP;
263 break;
264 }
265
266 return ret;
267 }
268
269 static int dsa_slave_port_fdb_add(struct net_device *dev,
270 struct switchdev_obj *obj)
271 {
272 struct switchdev_obj_fdb *fdb = &obj->u.fdb;
273 struct dsa_slave_priv *p = netdev_priv(dev);
274 struct dsa_switch *ds = p->parent;
275 int err;
276
277 if (obj->trans == SWITCHDEV_TRANS_PREPARE)
278 err = ds->drv->port_fdb_add ? 0 : -EOPNOTSUPP;
279 else if (obj->trans == SWITCHDEV_TRANS_COMMIT)
280 err = ds->drv->port_fdb_add(ds, p->port, fdb->vid, fdb->addr);
281 else
282 err = -EOPNOTSUPP;
283
284 return err;
285 }
286
287 static int dsa_slave_port_fdb_del(struct net_device *dev,
288 struct switchdev_obj *obj)
289 {
290 struct switchdev_obj_fdb *fdb = &obj->u.fdb;
291 struct dsa_slave_priv *p = netdev_priv(dev);
292 struct dsa_switch *ds = p->parent;
293
294 if (!ds->drv->port_fdb_del)
295 return -EOPNOTSUPP;
296
297 return ds->drv->port_fdb_del(ds, p->port, fdb->vid, fdb->addr);
298 }
299
300 static int dsa_slave_port_fdb_dump(struct net_device *dev,
301 struct switchdev_obj *obj)
302 {
303 struct switchdev_obj_fdb *fdb = &obj->u.fdb;
304 struct dsa_slave_priv *p = netdev_priv(dev);
305 struct dsa_switch *ds = p->parent;
306 int err;
307
308 if (!ds->drv->port_fdb_getnext)
309 return -EOPNOTSUPP;
310
311 memset(fdb, 0, sizeof(*fdb));
312
313 for (;;) {
314 err = ds->drv->port_fdb_getnext(ds, p->port, &fdb->vid,
315 fdb->addr, &fdb->is_static);
316 if (err)
317 break;
318
319 err = obj->cb(dev, obj);
320 if (err)
321 break;
322 }
323
324 return err == -ENOENT ? 0 : err;
325 }
326
327 static int dsa_slave_port_obj_add(struct net_device *dev,
328 struct switchdev_obj *obj)
329 {
330 int err;
331
332 switch (obj->id) {
333 case SWITCHDEV_OBJ_PORT_FDB:
334 err = dsa_slave_port_fdb_add(dev, obj);
335 break;
336 default:
337 err = -EOPNOTSUPP;
338 break;
339 }
340
341 return err;
342 }
343
344 static int dsa_slave_port_obj_del(struct net_device *dev,
345 struct switchdev_obj *obj)
346 {
347 int err;
348
349 switch (obj->id) {
350 case SWITCHDEV_OBJ_PORT_FDB:
351 err = dsa_slave_port_fdb_del(dev, obj);
352 break;
353 default:
354 err = -EOPNOTSUPP;
355 break;
356 }
357
358 return err;
359 }
360
361 static int dsa_slave_port_obj_dump(struct net_device *dev,
362 struct switchdev_obj *obj)
363 {
364 int err;
365
366 switch (obj->id) {
367 case SWITCHDEV_OBJ_PORT_FDB:
368 err = dsa_slave_port_fdb_dump(dev, obj);
369 break;
370 default:
371 err = -EOPNOTSUPP;
372 break;
373 }
374
375 return err;
376 }
377
378 static int dsa_slave_bridge_port_join(struct net_device *dev,
379 struct net_device *br)
380 {
381 struct dsa_slave_priv *p = netdev_priv(dev);
382 struct dsa_switch *ds = p->parent;
383 int ret = -EOPNOTSUPP;
384
385 p->bridge_dev = br;
386
387 if (ds->drv->port_join_bridge)
388 ret = ds->drv->port_join_bridge(ds, p->port,
389 dsa_slave_br_port_mask(ds, br));
390
391 return ret;
392 }
393
394 static int dsa_slave_bridge_port_leave(struct net_device *dev)
395 {
396 struct dsa_slave_priv *p = netdev_priv(dev);
397 struct dsa_switch *ds = p->parent;
398 int ret = -EOPNOTSUPP;
399
400
401 if (ds->drv->port_leave_bridge)
402 ret = ds->drv->port_leave_bridge(ds, p->port,
403 dsa_slave_br_port_mask(ds, p->bridge_dev));
404
405 p->bridge_dev = NULL;
406
407 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
408 * so allow it to be in BR_STATE_FORWARDING to be kept functional
409 */
410 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
411
412 return ret;
413 }
414
415 static int dsa_slave_port_attr_get(struct net_device *dev,
416 struct switchdev_attr *attr)
417 {
418 struct dsa_slave_priv *p = netdev_priv(dev);
419 struct dsa_switch *ds = p->parent;
420
421 switch (attr->id) {
422 case SWITCHDEV_ATTR_PORT_PARENT_ID:
423 attr->u.ppid.id_len = sizeof(ds->index);
424 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
425 break;
426 default:
427 return -EOPNOTSUPP;
428 }
429
430 return 0;
431 }
432
433 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
434 struct sk_buff *skb)
435 {
436 #ifdef CONFIG_NET_POLL_CONTROLLER
437 if (p->netpoll)
438 netpoll_send_skb(p->netpoll, skb);
439 #else
440 BUG();
441 #endif
442 return NETDEV_TX_OK;
443 }
444
445 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
446 {
447 struct dsa_slave_priv *p = netdev_priv(dev);
448 struct sk_buff *nskb;
449
450 dev->stats.tx_packets++;
451 dev->stats.tx_bytes += skb->len;
452
453 /* Transmit function may have to reallocate the original SKB */
454 nskb = p->xmit(skb, dev);
455 if (!nskb)
456 return NETDEV_TX_OK;
457
458 /* SKB for netpoll still need to be mangled with the protocol-specific
459 * tag to be successfully transmitted
460 */
461 if (unlikely(netpoll_tx_running(dev)))
462 return dsa_netpoll_send_skb(p, nskb);
463
464 /* Queue the SKB for transmission on the parent interface, but
465 * do not modify its EtherType
466 */
467 nskb->dev = p->parent->dst->master_netdev;
468 dev_queue_xmit(nskb);
469
470 return NETDEV_TX_OK;
471 }
472
473 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
474 struct net_device *dev)
475 {
476 /* Just return the original SKB */
477 return skb;
478 }
479
480
481 /* ethtool operations *******************************************************/
482 static int
483 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
484 {
485 struct dsa_slave_priv *p = netdev_priv(dev);
486 int err;
487
488 err = -EOPNOTSUPP;
489 if (p->phy != NULL) {
490 err = phy_read_status(p->phy);
491 if (err == 0)
492 err = phy_ethtool_gset(p->phy, cmd);
493 }
494
495 return err;
496 }
497
498 static int
499 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
500 {
501 struct dsa_slave_priv *p = netdev_priv(dev);
502
503 if (p->phy != NULL)
504 return phy_ethtool_sset(p->phy, cmd);
505
506 return -EOPNOTSUPP;
507 }
508
509 static void dsa_slave_get_drvinfo(struct net_device *dev,
510 struct ethtool_drvinfo *drvinfo)
511 {
512 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
513 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
514 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
515 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
516 }
517
518 static int dsa_slave_get_regs_len(struct net_device *dev)
519 {
520 struct dsa_slave_priv *p = netdev_priv(dev);
521 struct dsa_switch *ds = p->parent;
522
523 if (ds->drv->get_regs_len)
524 return ds->drv->get_regs_len(ds, p->port);
525
526 return -EOPNOTSUPP;
527 }
528
529 static void
530 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
531 {
532 struct dsa_slave_priv *p = netdev_priv(dev);
533 struct dsa_switch *ds = p->parent;
534
535 if (ds->drv->get_regs)
536 ds->drv->get_regs(ds, p->port, regs, _p);
537 }
538
539 static int dsa_slave_nway_reset(struct net_device *dev)
540 {
541 struct dsa_slave_priv *p = netdev_priv(dev);
542
543 if (p->phy != NULL)
544 return genphy_restart_aneg(p->phy);
545
546 return -EOPNOTSUPP;
547 }
548
549 static u32 dsa_slave_get_link(struct net_device *dev)
550 {
551 struct dsa_slave_priv *p = netdev_priv(dev);
552
553 if (p->phy != NULL) {
554 genphy_update_link(p->phy);
555 return p->phy->link;
556 }
557
558 return -EOPNOTSUPP;
559 }
560
561 static int dsa_slave_get_eeprom_len(struct net_device *dev)
562 {
563 struct dsa_slave_priv *p = netdev_priv(dev);
564 struct dsa_switch *ds = p->parent;
565
566 if (ds->pd->eeprom_len)
567 return ds->pd->eeprom_len;
568
569 if (ds->drv->get_eeprom_len)
570 return ds->drv->get_eeprom_len(ds);
571
572 return 0;
573 }
574
575 static int dsa_slave_get_eeprom(struct net_device *dev,
576 struct ethtool_eeprom *eeprom, u8 *data)
577 {
578 struct dsa_slave_priv *p = netdev_priv(dev);
579 struct dsa_switch *ds = p->parent;
580
581 if (ds->drv->get_eeprom)
582 return ds->drv->get_eeprom(ds, eeprom, data);
583
584 return -EOPNOTSUPP;
585 }
586
587 static int dsa_slave_set_eeprom(struct net_device *dev,
588 struct ethtool_eeprom *eeprom, u8 *data)
589 {
590 struct dsa_slave_priv *p = netdev_priv(dev);
591 struct dsa_switch *ds = p->parent;
592
593 if (ds->drv->set_eeprom)
594 return ds->drv->set_eeprom(ds, eeprom, data);
595
596 return -EOPNOTSUPP;
597 }
598
599 static void dsa_slave_get_strings(struct net_device *dev,
600 uint32_t stringset, uint8_t *data)
601 {
602 struct dsa_slave_priv *p = netdev_priv(dev);
603 struct dsa_switch *ds = p->parent;
604
605 if (stringset == ETH_SS_STATS) {
606 int len = ETH_GSTRING_LEN;
607
608 strncpy(data, "tx_packets", len);
609 strncpy(data + len, "tx_bytes", len);
610 strncpy(data + 2 * len, "rx_packets", len);
611 strncpy(data + 3 * len, "rx_bytes", len);
612 if (ds->drv->get_strings != NULL)
613 ds->drv->get_strings(ds, p->port, data + 4 * len);
614 }
615 }
616
617 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
618 struct ethtool_stats *stats,
619 uint64_t *data)
620 {
621 struct dsa_slave_priv *p = netdev_priv(dev);
622 struct dsa_switch *ds = p->parent;
623
624 data[0] = p->dev->stats.tx_packets;
625 data[1] = p->dev->stats.tx_bytes;
626 data[2] = p->dev->stats.rx_packets;
627 data[3] = p->dev->stats.rx_bytes;
628 if (ds->drv->get_ethtool_stats != NULL)
629 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
630 }
631
632 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
633 {
634 struct dsa_slave_priv *p = netdev_priv(dev);
635 struct dsa_switch *ds = p->parent;
636
637 if (sset == ETH_SS_STATS) {
638 int count;
639
640 count = 4;
641 if (ds->drv->get_sset_count != NULL)
642 count += ds->drv->get_sset_count(ds);
643
644 return count;
645 }
646
647 return -EOPNOTSUPP;
648 }
649
650 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
651 {
652 struct dsa_slave_priv *p = netdev_priv(dev);
653 struct dsa_switch *ds = p->parent;
654
655 if (ds->drv->get_wol)
656 ds->drv->get_wol(ds, p->port, w);
657 }
658
659 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
660 {
661 struct dsa_slave_priv *p = netdev_priv(dev);
662 struct dsa_switch *ds = p->parent;
663 int ret = -EOPNOTSUPP;
664
665 if (ds->drv->set_wol)
666 ret = ds->drv->set_wol(ds, p->port, w);
667
668 return ret;
669 }
670
671 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
672 {
673 struct dsa_slave_priv *p = netdev_priv(dev);
674 struct dsa_switch *ds = p->parent;
675 int ret;
676
677 if (!ds->drv->set_eee)
678 return -EOPNOTSUPP;
679
680 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
681 if (ret)
682 return ret;
683
684 if (p->phy)
685 ret = phy_ethtool_set_eee(p->phy, e);
686
687 return ret;
688 }
689
690 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
691 {
692 struct dsa_slave_priv *p = netdev_priv(dev);
693 struct dsa_switch *ds = p->parent;
694 int ret;
695
696 if (!ds->drv->get_eee)
697 return -EOPNOTSUPP;
698
699 ret = ds->drv->get_eee(ds, p->port, e);
700 if (ret)
701 return ret;
702
703 if (p->phy)
704 ret = phy_ethtool_get_eee(p->phy, e);
705
706 return ret;
707 }
708
709 #ifdef CONFIG_NET_POLL_CONTROLLER
710 static int dsa_slave_netpoll_setup(struct net_device *dev,
711 struct netpoll_info *ni)
712 {
713 struct dsa_slave_priv *p = netdev_priv(dev);
714 struct dsa_switch *ds = p->parent;
715 struct net_device *master = ds->dst->master_netdev;
716 struct netpoll *netpoll;
717 int err = 0;
718
719 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
720 if (!netpoll)
721 return -ENOMEM;
722
723 err = __netpoll_setup(netpoll, master);
724 if (err) {
725 kfree(netpoll);
726 goto out;
727 }
728
729 p->netpoll = netpoll;
730 out:
731 return err;
732 }
733
734 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
735 {
736 struct dsa_slave_priv *p = netdev_priv(dev);
737 struct netpoll *netpoll = p->netpoll;
738
739 if (!netpoll)
740 return;
741
742 p->netpoll = NULL;
743
744 __netpoll_free_async(netpoll);
745 }
746
747 static void dsa_slave_poll_controller(struct net_device *dev)
748 {
749 }
750 #endif
751
752 static const struct ethtool_ops dsa_slave_ethtool_ops = {
753 .get_settings = dsa_slave_get_settings,
754 .set_settings = dsa_slave_set_settings,
755 .get_drvinfo = dsa_slave_get_drvinfo,
756 .get_regs_len = dsa_slave_get_regs_len,
757 .get_regs = dsa_slave_get_regs,
758 .nway_reset = dsa_slave_nway_reset,
759 .get_link = dsa_slave_get_link,
760 .get_eeprom_len = dsa_slave_get_eeprom_len,
761 .get_eeprom = dsa_slave_get_eeprom,
762 .set_eeprom = dsa_slave_set_eeprom,
763 .get_strings = dsa_slave_get_strings,
764 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
765 .get_sset_count = dsa_slave_get_sset_count,
766 .set_wol = dsa_slave_set_wol,
767 .get_wol = dsa_slave_get_wol,
768 .set_eee = dsa_slave_set_eee,
769 .get_eee = dsa_slave_get_eee,
770 };
771
772 static const struct net_device_ops dsa_slave_netdev_ops = {
773 .ndo_open = dsa_slave_open,
774 .ndo_stop = dsa_slave_close,
775 .ndo_start_xmit = dsa_slave_xmit,
776 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
777 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
778 .ndo_set_mac_address = dsa_slave_set_mac_address,
779 .ndo_fdb_add = switchdev_port_fdb_add,
780 .ndo_fdb_del = switchdev_port_fdb_del,
781 .ndo_fdb_dump = switchdev_port_fdb_dump,
782 .ndo_do_ioctl = dsa_slave_ioctl,
783 .ndo_get_iflink = dsa_slave_get_iflink,
784 #ifdef CONFIG_NET_POLL_CONTROLLER
785 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
786 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
787 .ndo_poll_controller = dsa_slave_poll_controller,
788 #endif
789 };
790
791 static const struct switchdev_ops dsa_slave_switchdev_ops = {
792 .switchdev_port_attr_get = dsa_slave_port_attr_get,
793 .switchdev_port_attr_set = dsa_slave_port_attr_set,
794 .switchdev_port_obj_add = dsa_slave_port_obj_add,
795 .switchdev_port_obj_del = dsa_slave_port_obj_del,
796 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
797 };
798
799 static void dsa_slave_adjust_link(struct net_device *dev)
800 {
801 struct dsa_slave_priv *p = netdev_priv(dev);
802 struct dsa_switch *ds = p->parent;
803 unsigned int status_changed = 0;
804
805 if (p->old_link != p->phy->link) {
806 status_changed = 1;
807 p->old_link = p->phy->link;
808 }
809
810 if (p->old_duplex != p->phy->duplex) {
811 status_changed = 1;
812 p->old_duplex = p->phy->duplex;
813 }
814
815 if (p->old_pause != p->phy->pause) {
816 status_changed = 1;
817 p->old_pause = p->phy->pause;
818 }
819
820 if (ds->drv->adjust_link && status_changed)
821 ds->drv->adjust_link(ds, p->port, p->phy);
822
823 if (status_changed)
824 phy_print_status(p->phy);
825 }
826
827 static int dsa_slave_fixed_link_update(struct net_device *dev,
828 struct fixed_phy_status *status)
829 {
830 struct dsa_slave_priv *p = netdev_priv(dev);
831 struct dsa_switch *ds = p->parent;
832
833 if (ds->drv->fixed_link_update)
834 ds->drv->fixed_link_update(ds, p->port, status);
835
836 return 0;
837 }
838
839 /* slave device setup *******************************************************/
840 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
841 struct net_device *slave_dev,
842 int addr)
843 {
844 struct dsa_switch *ds = p->parent;
845
846 p->phy = ds->slave_mii_bus->phy_map[addr];
847 if (!p->phy)
848 return -ENODEV;
849
850 /* Use already configured phy mode */
851 p->phy_interface = p->phy->interface;
852 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
853 p->phy_interface);
854
855 return 0;
856 }
857
858 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
859 struct net_device *slave_dev)
860 {
861 struct dsa_switch *ds = p->parent;
862 struct dsa_chip_data *cd = ds->pd;
863 struct device_node *phy_dn, *port_dn;
864 bool phy_is_fixed = false;
865 u32 phy_flags = 0;
866 int mode, ret;
867
868 port_dn = cd->port_dn[p->port];
869 mode = of_get_phy_mode(port_dn);
870 if (mode < 0)
871 mode = PHY_INTERFACE_MODE_NA;
872 p->phy_interface = mode;
873
874 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
875 if (of_phy_is_fixed_link(port_dn)) {
876 /* In the case of a fixed PHY, the DT node associated
877 * to the fixed PHY is the Port DT node
878 */
879 ret = of_phy_register_fixed_link(port_dn);
880 if (ret) {
881 netdev_err(slave_dev, "failed to register fixed PHY\n");
882 return ret;
883 }
884 phy_is_fixed = true;
885 phy_dn = port_dn;
886 }
887
888 if (ds->drv->get_phy_flags)
889 phy_flags = ds->drv->get_phy_flags(ds, p->port);
890
891 if (phy_dn) {
892 ret = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
893 /* If this PHY address is part of phys_mii_mask, which means
894 * that we need to divert reads and writes to/from it, then we
895 * want to bind this device using the slave MII bus created by
896 * DSA to make that happen.
897 */
898 if (!phy_is_fixed && ret >= 0 &&
899 (ds->phys_mii_mask & (1 << ret))) {
900 ret = dsa_slave_phy_connect(p, slave_dev, ret);
901 if (ret)
902 return ret;
903 } else {
904 p->phy = of_phy_connect(slave_dev, phy_dn,
905 dsa_slave_adjust_link,
906 phy_flags,
907 p->phy_interface);
908 }
909 }
910
911 if (p->phy && phy_is_fixed)
912 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
913
914 /* We could not connect to a designated PHY, so use the switch internal
915 * MDIO bus instead
916 */
917 if (!p->phy) {
918 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
919 if (ret)
920 return ret;
921 } else {
922 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
923 p->phy->addr, p->phy->drv->name);
924 }
925
926 return 0;
927 }
928
929 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
930 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
931 struct netdev_queue *txq,
932 void *_unused)
933 {
934 lockdep_set_class(&txq->_xmit_lock,
935 &dsa_slave_netdev_xmit_lock_key);
936 }
937
938 int dsa_slave_suspend(struct net_device *slave_dev)
939 {
940 struct dsa_slave_priv *p = netdev_priv(slave_dev);
941
942 if (p->phy) {
943 phy_stop(p->phy);
944 p->old_pause = -1;
945 p->old_link = -1;
946 p->old_duplex = -1;
947 phy_suspend(p->phy);
948 }
949
950 return 0;
951 }
952
953 int dsa_slave_resume(struct net_device *slave_dev)
954 {
955 struct dsa_slave_priv *p = netdev_priv(slave_dev);
956
957 netif_device_attach(slave_dev);
958
959 if (p->phy) {
960 phy_resume(p->phy);
961 phy_start(p->phy);
962 }
963
964 return 0;
965 }
966
967 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
968 int port, char *name)
969 {
970 struct net_device *master = ds->dst->master_netdev;
971 struct net_device *slave_dev;
972 struct dsa_slave_priv *p;
973 int ret;
974
975 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
976 NET_NAME_UNKNOWN, ether_setup);
977 if (slave_dev == NULL)
978 return -ENOMEM;
979
980 slave_dev->features = master->vlan_features;
981 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
982 eth_hw_addr_inherit(slave_dev, master);
983 slave_dev->tx_queue_len = 0;
984 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
985 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
986
987 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
988 NULL);
989
990 SET_NETDEV_DEV(slave_dev, parent);
991 slave_dev->dev.of_node = ds->pd->port_dn[port];
992 slave_dev->vlan_features = master->vlan_features;
993
994 p = netdev_priv(slave_dev);
995 p->dev = slave_dev;
996 p->parent = ds;
997 p->port = port;
998
999 switch (ds->dst->tag_protocol) {
1000 #ifdef CONFIG_NET_DSA_TAG_DSA
1001 case DSA_TAG_PROTO_DSA:
1002 p->xmit = dsa_netdev_ops.xmit;
1003 break;
1004 #endif
1005 #ifdef CONFIG_NET_DSA_TAG_EDSA
1006 case DSA_TAG_PROTO_EDSA:
1007 p->xmit = edsa_netdev_ops.xmit;
1008 break;
1009 #endif
1010 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1011 case DSA_TAG_PROTO_TRAILER:
1012 p->xmit = trailer_netdev_ops.xmit;
1013 break;
1014 #endif
1015 #ifdef CONFIG_NET_DSA_TAG_BRCM
1016 case DSA_TAG_PROTO_BRCM:
1017 p->xmit = brcm_netdev_ops.xmit;
1018 break;
1019 #endif
1020 default:
1021 p->xmit = dsa_slave_notag_xmit;
1022 break;
1023 }
1024
1025 p->old_pause = -1;
1026 p->old_link = -1;
1027 p->old_duplex = -1;
1028
1029 ret = dsa_slave_phy_setup(p, slave_dev);
1030 if (ret) {
1031 free_netdev(slave_dev);
1032 return ret;
1033 }
1034
1035 ds->ports[port] = slave_dev;
1036 ret = register_netdev(slave_dev);
1037 if (ret) {
1038 netdev_err(master, "error %d registering interface %s\n",
1039 ret, slave_dev->name);
1040 phy_disconnect(p->phy);
1041 ds->ports[port] = NULL;
1042 free_netdev(slave_dev);
1043 return ret;
1044 }
1045
1046 netif_carrier_off(slave_dev);
1047
1048 return 0;
1049 }
1050
1051 static bool dsa_slave_dev_check(struct net_device *dev)
1052 {
1053 return dev->netdev_ops == &dsa_slave_netdev_ops;
1054 }
1055
1056 static int dsa_slave_master_changed(struct net_device *dev)
1057 {
1058 struct net_device *master = netdev_master_upper_dev_get(dev);
1059 struct dsa_slave_priv *p = netdev_priv(dev);
1060 int err = 0;
1061
1062 if (master && master->rtnl_link_ops &&
1063 !strcmp(master->rtnl_link_ops->kind, "bridge"))
1064 err = dsa_slave_bridge_port_join(dev, master);
1065 else if (dsa_port_is_bridged(p))
1066 err = dsa_slave_bridge_port_leave(dev);
1067
1068 return err;
1069 }
1070
1071 int dsa_slave_netdevice_event(struct notifier_block *unused,
1072 unsigned long event, void *ptr)
1073 {
1074 struct net_device *dev;
1075 int err = 0;
1076
1077 switch (event) {
1078 case NETDEV_CHANGEUPPER:
1079 dev = netdev_notifier_info_to_dev(ptr);
1080 if (!dsa_slave_dev_check(dev))
1081 goto out;
1082
1083 err = dsa_slave_master_changed(dev);
1084 if (err)
1085 netdev_warn(dev, "failed to reflect master change\n");
1086
1087 break;
1088 }
1089
1090 out:
1091 return NOTIFY_DONE;
1092 }
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