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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 "dsa_priv.h"
22
23
24static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
25{
26 struct dsa_switch *ds = bus->priv;
27
28 if (ds->phys_mii_mask & (1 << addr))
29 return ds->drv->phy_read(ds, addr, reg);
30
31 return 0xffff;
32}
33
34static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
35{
36 struct dsa_switch *ds = bus->priv;
37
38 if (ds->phys_mii_mask & (1 << addr))
39 return ds->drv->phy_write(ds, addr, reg, val);
40
41 return 0;
42}
43
44void dsa_slave_mii_bus_init(struct dsa_switch *ds)
45{
46 ds->slave_mii_bus->priv = (void *)ds;
47 ds->slave_mii_bus->name = "dsa slave smi";
48 ds->slave_mii_bus->read = dsa_slave_phy_read;
49 ds->slave_mii_bus->write = dsa_slave_phy_write;
50 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x",
51 ds->index, ds->pd->sw_addr);
52 ds->slave_mii_bus->parent = ds->master_dev;
53 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
54}
55
56
57
58static int dsa_slave_get_iflink(const struct net_device *dev)
59{
60 struct dsa_slave_priv *p = netdev_priv(dev);
61
62 return p->parent->dst->master_netdev->ifindex;
63}
64
65static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p)
66{
67 return !!p->bridge_dev;
68}
69
70static int dsa_slave_open(struct net_device *dev)
71{
72 struct dsa_slave_priv *p = netdev_priv(dev);
73 struct net_device *master = p->parent->dst->master_netdev;
74 struct dsa_switch *ds = p->parent;
75 u8 stp_state = dsa_port_is_bridged(p) ?
76 BR_STATE_BLOCKING : BR_STATE_FORWARDING;
77 int err;
78
79 if (!(master->flags & IFF_UP))
80 return -ENETDOWN;
81
82 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
83 err = dev_uc_add(master, dev->dev_addr);
84 if (err < 0)
85 goto out;
86 }
87
88 if (dev->flags & IFF_ALLMULTI) {
89 err = dev_set_allmulti(master, 1);
90 if (err < 0)
91 goto del_unicast;
92 }
93 if (dev->flags & IFF_PROMISC) {
94 err = dev_set_promiscuity(master, 1);
95 if (err < 0)
96 goto clear_allmulti;
97 }
98
99 if (ds->drv->port_enable) {
100 err = ds->drv->port_enable(ds, p->port, p->phy);
101 if (err)
102 goto clear_promisc;
103 }
104
105 if (ds->drv->port_stp_update)
106 ds->drv->port_stp_update(ds, p->port, stp_state);
107
108 if (p->phy)
109 phy_start(p->phy);
110
111 return 0;
112
113clear_promisc:
114 if (dev->flags & IFF_PROMISC)
115 dev_set_promiscuity(master, -1);
116clear_allmulti:
117 if (dev->flags & IFF_ALLMULTI)
118 dev_set_allmulti(master, -1);
119del_unicast:
120 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
121 dev_uc_del(master, dev->dev_addr);
122out:
123 return err;
124}
125
126static int dsa_slave_close(struct net_device *dev)
127{
128 struct dsa_slave_priv *p = netdev_priv(dev);
129 struct net_device *master = p->parent->dst->master_netdev;
130 struct dsa_switch *ds = p->parent;
131
132 if (p->phy)
133 phy_stop(p->phy);
134
135 dev_mc_unsync(master, dev);
136 dev_uc_unsync(master, dev);
137 if (dev->flags & IFF_ALLMULTI)
138 dev_set_allmulti(master, -1);
139 if (dev->flags & IFF_PROMISC)
140 dev_set_promiscuity(master, -1);
141
142 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
143 dev_uc_del(master, dev->dev_addr);
144
145 if (ds->drv->port_disable)
146 ds->drv->port_disable(ds, p->port, p->phy);
147
148 if (ds->drv->port_stp_update)
149 ds->drv->port_stp_update(ds, p->port, BR_STATE_DISABLED);
150
151 return 0;
152}
153
154static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
155{
156 struct dsa_slave_priv *p = netdev_priv(dev);
157 struct net_device *master = p->parent->dst->master_netdev;
158
159 if (change & IFF_ALLMULTI)
160 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
161 if (change & IFF_PROMISC)
162 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
163}
164
165static void dsa_slave_set_rx_mode(struct net_device *dev)
166{
167 struct dsa_slave_priv *p = netdev_priv(dev);
168 struct net_device *master = p->parent->dst->master_netdev;
169
170 dev_mc_sync(master, dev);
171 dev_uc_sync(master, dev);
172}
173
174static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
175{
176 struct dsa_slave_priv *p = netdev_priv(dev);
177 struct net_device *master = p->parent->dst->master_netdev;
178 struct sockaddr *addr = a;
179 int err;
180
181 if (!is_valid_ether_addr(addr->sa_data))
182 return -EADDRNOTAVAIL;
183
184 if (!(dev->flags & IFF_UP))
185 goto out;
186
187 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
188 err = dev_uc_add(master, addr->sa_data);
189 if (err < 0)
190 return err;
191 }
192
193 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
194 dev_uc_del(master, dev->dev_addr);
195
196out:
197 ether_addr_copy(dev->dev_addr, addr->sa_data);
198
199 return 0;
200}
201
202static int dsa_slave_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
203 struct net_device *dev,
204 const unsigned char *addr, u16 vid, u16 nlm_flags)
205{
206 struct dsa_slave_priv *p = netdev_priv(dev);
207 struct dsa_switch *ds = p->parent;
208 int ret = -EOPNOTSUPP;
209
210 if (ds->drv->fdb_add)
211 ret = ds->drv->fdb_add(ds, p->port, addr, vid);
212
213 return ret;
214}
215
216static int dsa_slave_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
217 struct net_device *dev,
218 const unsigned char *addr, u16 vid)
219{
220 struct dsa_slave_priv *p = netdev_priv(dev);
221 struct dsa_switch *ds = p->parent;
222 int ret = -EOPNOTSUPP;
223
224 if (ds->drv->fdb_del)
225 ret = ds->drv->fdb_del(ds, p->port, addr, vid);
226
227 return ret;
228}
229
230static int dsa_slave_fill_info(struct net_device *dev, struct sk_buff *skb,
231 const unsigned char *addr, u16 vid,
232 bool is_static,
233 u32 portid, u32 seq, int type,
234 unsigned int flags)
235{
236 struct nlmsghdr *nlh;
237 struct ndmsg *ndm;
238
239 nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
240 if (!nlh)
241 return -EMSGSIZE;
242
243 ndm = nlmsg_data(nlh);
244 ndm->ndm_family = AF_BRIDGE;
245 ndm->ndm_pad1 = 0;
246 ndm->ndm_pad2 = 0;
247 ndm->ndm_flags = NTF_EXT_LEARNED;
248 ndm->ndm_type = 0;
249 ndm->ndm_ifindex = dev->ifindex;
250 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
251
252 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
253 goto nla_put_failure;
254
255 if (vid && nla_put_u16(skb, NDA_VLAN, vid))
256 goto nla_put_failure;
257
258 nlmsg_end(skb, nlh);
259 return 0;
260
261nla_put_failure:
262 nlmsg_cancel(skb, nlh);
263 return -EMSGSIZE;
264}
265
266
267static int dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
268 struct net_device *dev,
269 struct net_device *filter_dev, int idx)
270{
271 struct dsa_slave_priv *p = netdev_priv(dev);
272 struct dsa_switch *ds = p->parent;
273 unsigned char addr[ETH_ALEN] = { 0 };
274 int ret;
275
276 if (!ds->drv->fdb_getnext)
277 return -EOPNOTSUPP;
278
279 for (; ; idx++) {
280 bool is_static;
281
282 ret = ds->drv->fdb_getnext(ds, p->port, addr, &is_static);
283 if (ret < 0)
284 break;
285
286 if (idx < cb->args[0])
287 continue;
288
289 ret = dsa_slave_fill_info(dev, skb, addr, 0,
290 is_static,
291 NETLINK_CB(cb->skb).portid,
292 cb->nlh->nlmsg_seq,
293 RTM_NEWNEIGH, NLM_F_MULTI);
294 if (ret < 0)
295 break;
296 }
297
298 return idx;
299}
300
301static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
302{
303 struct dsa_slave_priv *p = netdev_priv(dev);
304
305 if (p->phy != NULL)
306 return phy_mii_ioctl(p->phy, ifr, cmd);
307
308 return -EOPNOTSUPP;
309}
310
311
312
313
314
315static u32 dsa_slave_br_port_mask(struct dsa_switch *ds,
316 struct net_device *bridge)
317{
318 struct dsa_slave_priv *p;
319 unsigned int port;
320 u32 mask = 0;
321
322 for (port = 0; port < DSA_MAX_PORTS; port++) {
323 if (!dsa_is_port_initialized(ds, port))
324 continue;
325
326 p = netdev_priv(ds->ports[port]);
327
328 if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT &&
329 p->bridge_dev == bridge)
330 mask |= 1 << port;
331 }
332
333 return mask;
334}
335
336static int dsa_slave_stp_update(struct net_device *dev, u8 state)
337{
338 struct dsa_slave_priv *p = netdev_priv(dev);
339 struct dsa_switch *ds = p->parent;
340 int ret = -EOPNOTSUPP;
341
342 if (ds->drv->port_stp_update)
343 ret = ds->drv->port_stp_update(ds, p->port, state);
344
345 return ret;
346}
347
348static int dsa_slave_port_attr_set(struct net_device *dev,
349 struct switchdev_attr *attr)
350{
351 int ret = 0;
352
353 switch (attr->id) {
354 case SWITCHDEV_ATTR_PORT_STP_STATE:
355 if (attr->trans == SWITCHDEV_TRANS_COMMIT)
356 ret = dsa_slave_stp_update(dev, attr->u.stp_state);
357 break;
358 default:
359 ret = -EOPNOTSUPP;
360 break;
361 }
362
363 return ret;
364}
365
366static int dsa_slave_bridge_port_join(struct net_device *dev,
367 struct net_device *br)
368{
369 struct dsa_slave_priv *p = netdev_priv(dev);
370 struct dsa_switch *ds = p->parent;
371 int ret = -EOPNOTSUPP;
372
373 p->bridge_dev = br;
374
375 if (ds->drv->port_join_bridge)
376 ret = ds->drv->port_join_bridge(ds, p->port,
377 dsa_slave_br_port_mask(ds, br));
378
379 return ret;
380}
381
382static int dsa_slave_bridge_port_leave(struct net_device *dev)
383{
384 struct dsa_slave_priv *p = netdev_priv(dev);
385 struct dsa_switch *ds = p->parent;
386 int ret = -EOPNOTSUPP;
387
388
389 if (ds->drv->port_leave_bridge)
390 ret = ds->drv->port_leave_bridge(ds, p->port,
391 dsa_slave_br_port_mask(ds, p->bridge_dev));
392
393 p->bridge_dev = NULL;
394
395
396
397
398 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
399
400 return ret;
401}
402
403static int dsa_slave_port_attr_get(struct net_device *dev,
404 struct switchdev_attr *attr)
405{
406 struct dsa_slave_priv *p = netdev_priv(dev);
407 struct dsa_switch *ds = p->parent;
408
409 switch (attr->id) {
410 case SWITCHDEV_ATTR_PORT_PARENT_ID:
411 attr->u.ppid.id_len = sizeof(ds->index);
412 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
413 break;
414 default:
415 return -EOPNOTSUPP;
416 }
417
418 return 0;
419}
420
421static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
422{
423 struct dsa_slave_priv *p = netdev_priv(dev);
424
425 return p->xmit(skb, dev);
426}
427
428static netdev_tx_t dsa_slave_notag_xmit(struct sk_buff *skb,
429 struct net_device *dev)
430{
431 struct dsa_slave_priv *p = netdev_priv(dev);
432
433 skb->dev = p->parent->dst->master_netdev;
434 dev_queue_xmit(skb);
435
436 return NETDEV_TX_OK;
437}
438
439
440
441static int
442dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
443{
444 struct dsa_slave_priv *p = netdev_priv(dev);
445 int err;
446
447 err = -EOPNOTSUPP;
448 if (p->phy != NULL) {
449 err = phy_read_status(p->phy);
450 if (err == 0)
451 err = phy_ethtool_gset(p->phy, cmd);
452 }
453
454 return err;
455}
456
457static int
458dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
459{
460 struct dsa_slave_priv *p = netdev_priv(dev);
461
462 if (p->phy != NULL)
463 return phy_ethtool_sset(p->phy, cmd);
464
465 return -EOPNOTSUPP;
466}
467
468static void dsa_slave_get_drvinfo(struct net_device *dev,
469 struct ethtool_drvinfo *drvinfo)
470{
471 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
472 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
473 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
474 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
475}
476
477static int dsa_slave_get_regs_len(struct net_device *dev)
478{
479 struct dsa_slave_priv *p = netdev_priv(dev);
480 struct dsa_switch *ds = p->parent;
481
482 if (ds->drv->get_regs_len)
483 return ds->drv->get_regs_len(ds, p->port);
484
485 return -EOPNOTSUPP;
486}
487
488static void
489dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
490{
491 struct dsa_slave_priv *p = netdev_priv(dev);
492 struct dsa_switch *ds = p->parent;
493
494 if (ds->drv->get_regs)
495 ds->drv->get_regs(ds, p->port, regs, _p);
496}
497
498static int dsa_slave_nway_reset(struct net_device *dev)
499{
500 struct dsa_slave_priv *p = netdev_priv(dev);
501
502 if (p->phy != NULL)
503 return genphy_restart_aneg(p->phy);
504
505 return -EOPNOTSUPP;
506}
507
508static u32 dsa_slave_get_link(struct net_device *dev)
509{
510 struct dsa_slave_priv *p = netdev_priv(dev);
511
512 if (p->phy != NULL) {
513 genphy_update_link(p->phy);
514 return p->phy->link;
515 }
516
517 return -EOPNOTSUPP;
518}
519
520static int dsa_slave_get_eeprom_len(struct net_device *dev)
521{
522 struct dsa_slave_priv *p = netdev_priv(dev);
523 struct dsa_switch *ds = p->parent;
524
525 if (ds->pd->eeprom_len)
526 return ds->pd->eeprom_len;
527
528 if (ds->drv->get_eeprom_len)
529 return ds->drv->get_eeprom_len(ds);
530
531 return 0;
532}
533
534static int dsa_slave_get_eeprom(struct net_device *dev,
535 struct ethtool_eeprom *eeprom, u8 *data)
536{
537 struct dsa_slave_priv *p = netdev_priv(dev);
538 struct dsa_switch *ds = p->parent;
539
540 if (ds->drv->get_eeprom)
541 return ds->drv->get_eeprom(ds, eeprom, data);
542
543 return -EOPNOTSUPP;
544}
545
546static int dsa_slave_set_eeprom(struct net_device *dev,
547 struct ethtool_eeprom *eeprom, u8 *data)
548{
549 struct dsa_slave_priv *p = netdev_priv(dev);
550 struct dsa_switch *ds = p->parent;
551
552 if (ds->drv->set_eeprom)
553 return ds->drv->set_eeprom(ds, eeprom, data);
554
555 return -EOPNOTSUPP;
556}
557
558static void dsa_slave_get_strings(struct net_device *dev,
559 uint32_t stringset, uint8_t *data)
560{
561 struct dsa_slave_priv *p = netdev_priv(dev);
562 struct dsa_switch *ds = p->parent;
563
564 if (stringset == ETH_SS_STATS) {
565 int len = ETH_GSTRING_LEN;
566
567 strncpy(data, "tx_packets", len);
568 strncpy(data + len, "tx_bytes", len);
569 strncpy(data + 2 * len, "rx_packets", len);
570 strncpy(data + 3 * len, "rx_bytes", len);
571 if (ds->drv->get_strings != NULL)
572 ds->drv->get_strings(ds, p->port, data + 4 * len);
573 }
574}
575
576static void dsa_slave_get_ethtool_stats(struct net_device *dev,
577 struct ethtool_stats *stats,
578 uint64_t *data)
579{
580 struct dsa_slave_priv *p = netdev_priv(dev);
581 struct dsa_switch *ds = p->parent;
582
583 data[0] = p->dev->stats.tx_packets;
584 data[1] = p->dev->stats.tx_bytes;
585 data[2] = p->dev->stats.rx_packets;
586 data[3] = p->dev->stats.rx_bytes;
587 if (ds->drv->get_ethtool_stats != NULL)
588 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
589}
590
591static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
592{
593 struct dsa_slave_priv *p = netdev_priv(dev);
594 struct dsa_switch *ds = p->parent;
595
596 if (sset == ETH_SS_STATS) {
597 int count;
598
599 count = 4;
600 if (ds->drv->get_sset_count != NULL)
601 count += ds->drv->get_sset_count(ds);
602
603 return count;
604 }
605
606 return -EOPNOTSUPP;
607}
608
609static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
610{
611 struct dsa_slave_priv *p = netdev_priv(dev);
612 struct dsa_switch *ds = p->parent;
613
614 if (ds->drv->get_wol)
615 ds->drv->get_wol(ds, p->port, w);
616}
617
618static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
619{
620 struct dsa_slave_priv *p = netdev_priv(dev);
621 struct dsa_switch *ds = p->parent;
622 int ret = -EOPNOTSUPP;
623
624 if (ds->drv->set_wol)
625 ret = ds->drv->set_wol(ds, p->port, w);
626
627 return ret;
628}
629
630static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
631{
632 struct dsa_slave_priv *p = netdev_priv(dev);
633 struct dsa_switch *ds = p->parent;
634 int ret;
635
636 if (!ds->drv->set_eee)
637 return -EOPNOTSUPP;
638
639 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
640 if (ret)
641 return ret;
642
643 if (p->phy)
644 ret = phy_ethtool_set_eee(p->phy, e);
645
646 return ret;
647}
648
649static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
650{
651 struct dsa_slave_priv *p = netdev_priv(dev);
652 struct dsa_switch *ds = p->parent;
653 int ret;
654
655 if (!ds->drv->get_eee)
656 return -EOPNOTSUPP;
657
658 ret = ds->drv->get_eee(ds, p->port, e);
659 if (ret)
660 return ret;
661
662 if (p->phy)
663 ret = phy_ethtool_get_eee(p->phy, e);
664
665 return ret;
666}
667
668static const struct ethtool_ops dsa_slave_ethtool_ops = {
669 .get_settings = dsa_slave_get_settings,
670 .set_settings = dsa_slave_set_settings,
671 .get_drvinfo = dsa_slave_get_drvinfo,
672 .get_regs_len = dsa_slave_get_regs_len,
673 .get_regs = dsa_slave_get_regs,
674 .nway_reset = dsa_slave_nway_reset,
675 .get_link = dsa_slave_get_link,
676 .get_eeprom_len = dsa_slave_get_eeprom_len,
677 .get_eeprom = dsa_slave_get_eeprom,
678 .set_eeprom = dsa_slave_set_eeprom,
679 .get_strings = dsa_slave_get_strings,
680 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
681 .get_sset_count = dsa_slave_get_sset_count,
682 .set_wol = dsa_slave_set_wol,
683 .get_wol = dsa_slave_get_wol,
684 .set_eee = dsa_slave_set_eee,
685 .get_eee = dsa_slave_get_eee,
686};
687
688static const struct net_device_ops dsa_slave_netdev_ops = {
689 .ndo_open = dsa_slave_open,
690 .ndo_stop = dsa_slave_close,
691 .ndo_start_xmit = dsa_slave_xmit,
692 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
693 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
694 .ndo_set_mac_address = dsa_slave_set_mac_address,
695 .ndo_fdb_add = dsa_slave_fdb_add,
696 .ndo_fdb_del = dsa_slave_fdb_del,
697 .ndo_fdb_dump = dsa_slave_fdb_dump,
698 .ndo_do_ioctl = dsa_slave_ioctl,
699 .ndo_get_iflink = dsa_slave_get_iflink,
700};
701
702static const struct switchdev_ops dsa_slave_switchdev_ops = {
703 .switchdev_port_attr_get = dsa_slave_port_attr_get,
704 .switchdev_port_attr_set = dsa_slave_port_attr_set,
705};
706
707static void dsa_slave_adjust_link(struct net_device *dev)
708{
709 struct dsa_slave_priv *p = netdev_priv(dev);
710 struct dsa_switch *ds = p->parent;
711 unsigned int status_changed = 0;
712
713 if (p->old_link != p->phy->link) {
714 status_changed = 1;
715 p->old_link = p->phy->link;
716 }
717
718 if (p->old_duplex != p->phy->duplex) {
719 status_changed = 1;
720 p->old_duplex = p->phy->duplex;
721 }
722
723 if (p->old_pause != p->phy->pause) {
724 status_changed = 1;
725 p->old_pause = p->phy->pause;
726 }
727
728 if (ds->drv->adjust_link && status_changed)
729 ds->drv->adjust_link(ds, p->port, p->phy);
730
731 if (status_changed)
732 phy_print_status(p->phy);
733}
734
735static int dsa_slave_fixed_link_update(struct net_device *dev,
736 struct fixed_phy_status *status)
737{
738 struct dsa_slave_priv *p = netdev_priv(dev);
739 struct dsa_switch *ds = p->parent;
740
741 if (ds->drv->fixed_link_update)
742 ds->drv->fixed_link_update(ds, p->port, status);
743
744 return 0;
745}
746
747
748static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
749 struct net_device *slave_dev,
750 int addr)
751{
752 struct dsa_switch *ds = p->parent;
753
754 p->phy = ds->slave_mii_bus->phy_map[addr];
755 if (!p->phy)
756 return -ENODEV;
757
758
759 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
760 p->phy_interface = p->phy->interface;
761 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
762 p->phy_interface);
763
764 return 0;
765}
766
767static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
768 struct net_device *slave_dev)
769{
770 struct dsa_switch *ds = p->parent;
771 struct dsa_chip_data *cd = ds->pd;
772 struct device_node *phy_dn, *port_dn;
773 bool phy_is_fixed = false;
774 u32 phy_flags = 0;
775 int mode, ret;
776
777 port_dn = cd->port_dn[p->port];
778 mode = of_get_phy_mode(port_dn);
779 if (mode < 0)
780 mode = PHY_INTERFACE_MODE_NA;
781 p->phy_interface = mode;
782
783 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
784 if (of_phy_is_fixed_link(port_dn)) {
785
786
787
788 ret = of_phy_register_fixed_link(port_dn);
789 if (ret) {
790 netdev_err(slave_dev, "failed to register fixed PHY\n");
791 return ret;
792 }
793 phy_is_fixed = true;
794 phy_dn = port_dn;
795 }
796
797 if (ds->drv->get_phy_flags)
798 phy_flags = ds->drv->get_phy_flags(ds, p->port);
799
800 if (phy_dn) {
801 ret = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
802
803
804
805
806
807 if (!phy_is_fixed && ret >= 0 &&
808 (ds->phys_mii_mask & (1 << ret))) {
809 ret = dsa_slave_phy_connect(p, slave_dev, ret);
810 if (ret)
811 return ret;
812 } else {
813 p->phy = of_phy_connect(slave_dev, phy_dn,
814 dsa_slave_adjust_link,
815 phy_flags,
816 p->phy_interface);
817 }
818 }
819
820 if (p->phy && phy_is_fixed)
821 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
822
823
824
825
826 if (!p->phy) {
827 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
828 if (ret)
829 return ret;
830 } else {
831 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
832 p->phy->addr, p->phy->drv->name);
833 }
834
835 return 0;
836}
837
838static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
839static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
840 struct netdev_queue *txq,
841 void *_unused)
842{
843 lockdep_set_class(&txq->_xmit_lock,
844 &dsa_slave_netdev_xmit_lock_key);
845}
846
847int dsa_slave_suspend(struct net_device *slave_dev)
848{
849 struct dsa_slave_priv *p = netdev_priv(slave_dev);
850
851 if (p->phy) {
852 phy_stop(p->phy);
853 p->old_pause = -1;
854 p->old_link = -1;
855 p->old_duplex = -1;
856 phy_suspend(p->phy);
857 }
858
859 return 0;
860}
861
862int dsa_slave_resume(struct net_device *slave_dev)
863{
864 struct dsa_slave_priv *p = netdev_priv(slave_dev);
865
866 netif_device_attach(slave_dev);
867
868 if (p->phy) {
869 phy_resume(p->phy);
870 phy_start(p->phy);
871 }
872
873 return 0;
874}
875
876int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
877 int port, char *name)
878{
879 struct net_device *master = ds->dst->master_netdev;
880 struct net_device *slave_dev;
881 struct dsa_slave_priv *p;
882 int ret;
883
884 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
885 NET_NAME_UNKNOWN, ether_setup);
886 if (slave_dev == NULL)
887 return -ENOMEM;
888
889 slave_dev->features = master->vlan_features;
890 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
891 eth_hw_addr_inherit(slave_dev, master);
892 slave_dev->tx_queue_len = 0;
893 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
894 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
895
896 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
897 NULL);
898
899 SET_NETDEV_DEV(slave_dev, parent);
900 slave_dev->dev.of_node = ds->pd->port_dn[port];
901 slave_dev->vlan_features = master->vlan_features;
902
903 p = netdev_priv(slave_dev);
904 p->dev = slave_dev;
905 p->parent = ds;
906 p->port = port;
907
908 switch (ds->dst->tag_protocol) {
909#ifdef CONFIG_NET_DSA_TAG_DSA
910 case DSA_TAG_PROTO_DSA:
911 p->xmit = dsa_netdev_ops.xmit;
912 break;
913#endif
914#ifdef CONFIG_NET_DSA_TAG_EDSA
915 case DSA_TAG_PROTO_EDSA:
916 p->xmit = edsa_netdev_ops.xmit;
917 break;
918#endif
919#ifdef CONFIG_NET_DSA_TAG_TRAILER
920 case DSA_TAG_PROTO_TRAILER:
921 p->xmit = trailer_netdev_ops.xmit;
922 break;
923#endif
924#ifdef CONFIG_NET_DSA_TAG_BRCM
925 case DSA_TAG_PROTO_BRCM:
926 p->xmit = brcm_netdev_ops.xmit;
927 break;
928#endif
929 default:
930 p->xmit = dsa_slave_notag_xmit;
931 break;
932 }
933
934 p->old_pause = -1;
935 p->old_link = -1;
936 p->old_duplex = -1;
937
938 ret = dsa_slave_phy_setup(p, slave_dev);
939 if (ret) {
940 free_netdev(slave_dev);
941 return ret;
942 }
943
944 ds->ports[port] = slave_dev;
945 ret = register_netdev(slave_dev);
946 if (ret) {
947 netdev_err(master, "error %d registering interface %s\n",
948 ret, slave_dev->name);
949 phy_disconnect(p->phy);
950 ds->ports[port] = NULL;
951 free_netdev(slave_dev);
952 return ret;
953 }
954
955 netif_carrier_off(slave_dev);
956
957 return 0;
958}
959
960static bool dsa_slave_dev_check(struct net_device *dev)
961{
962 return dev->netdev_ops == &dsa_slave_netdev_ops;
963}
964
965static int dsa_slave_master_changed(struct net_device *dev)
966{
967 struct net_device *master = netdev_master_upper_dev_get(dev);
968 struct dsa_slave_priv *p = netdev_priv(dev);
969 int err = 0;
970
971 if (master && master->rtnl_link_ops &&
972 !strcmp(master->rtnl_link_ops->kind, "bridge"))
973 err = dsa_slave_bridge_port_join(dev, master);
974 else if (dsa_port_is_bridged(p))
975 err = dsa_slave_bridge_port_leave(dev);
976
977 return err;
978}
979
980int dsa_slave_netdevice_event(struct notifier_block *unused,
981 unsigned long event, void *ptr)
982{
983 struct net_device *dev;
984 int err = 0;
985
986 switch (event) {
987 case NETDEV_CHANGEUPPER:
988 dev = netdev_notifier_info_to_dev(ptr);
989 if (!dsa_slave_dev_check(dev))
990 goto out;
991
992 err = dsa_slave_master_changed(dev);
993 if (err)
994 netdev_warn(dev, "failed to reflect master change\n");
995
996 break;
997 }
998
999out:
1000 return NOTIFY_DONE;
1001}
1002
