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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 <linux/netpoll.h>
22#include "dsa_priv.h"
23
24
25static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
26{
27 struct dsa_switch *ds = bus->priv;
28
29 if (ds->phys_mii_mask & (1 << addr))
30 return ds->drv->phy_read(ds, addr, reg);
31
32 return 0xffff;
33}
34
35static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
36{
37 struct dsa_switch *ds = bus->priv;
38
39 if (ds->phys_mii_mask & (1 << addr))
40 return ds->drv->phy_write(ds, addr, reg, val);
41
42 return 0;
43}
44
45void dsa_slave_mii_bus_init(struct dsa_switch *ds)
46{
47 ds->slave_mii_bus->priv = (void *)ds;
48 ds->slave_mii_bus->name = "dsa slave smi";
49 ds->slave_mii_bus->read = dsa_slave_phy_read;
50 ds->slave_mii_bus->write = dsa_slave_phy_write;
51 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x",
52 ds->index, ds->pd->sw_addr);
53 ds->slave_mii_bus->parent = ds->master_dev;
54 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
55}
56
57
58
59static int dsa_slave_get_iflink(const struct net_device *dev)
60{
61 struct dsa_slave_priv *p = netdev_priv(dev);
62
63 return p->parent->dst->master_netdev->ifindex;
64}
65
66static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p)
67{
68 return !!p->bridge_dev;
69}
70
71static int dsa_slave_open(struct net_device *dev)
72{
73 struct dsa_slave_priv *p = netdev_priv(dev);
74 struct net_device *master = p->parent->dst->master_netdev;
75 struct dsa_switch *ds = p->parent;
76 u8 stp_state = dsa_port_is_bridged(p) ?
77 BR_STATE_BLOCKING : BR_STATE_FORWARDING;
78 int err;
79
80 if (!(master->flags & IFF_UP))
81 return -ENETDOWN;
82
83 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
84 err = dev_uc_add(master, dev->dev_addr);
85 if (err < 0)
86 goto out;
87 }
88
89 if (dev->flags & IFF_ALLMULTI) {
90 err = dev_set_allmulti(master, 1);
91 if (err < 0)
92 goto del_unicast;
93 }
94 if (dev->flags & IFF_PROMISC) {
95 err = dev_set_promiscuity(master, 1);
96 if (err < 0)
97 goto clear_allmulti;
98 }
99
100 if (ds->drv->port_enable) {
101 err = ds->drv->port_enable(ds, p->port, p->phy);
102 if (err)
103 goto clear_promisc;
104 }
105
106 if (ds->drv->port_stp_update)
107 ds->drv->port_stp_update(ds, p->port, stp_state);
108
109 if (p->phy)
110 phy_start(p->phy);
111
112 return 0;
113
114clear_promisc:
115 if (dev->flags & IFF_PROMISC)
116 dev_set_promiscuity(master, -1);
117clear_allmulti:
118 if (dev->flags & IFF_ALLMULTI)
119 dev_set_allmulti(master, -1);
120del_unicast:
121 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
122 dev_uc_del(master, dev->dev_addr);
123out:
124 return err;
125}
126
127static int dsa_slave_close(struct net_device *dev)
128{
129 struct dsa_slave_priv *p = netdev_priv(dev);
130 struct net_device *master = p->parent->dst->master_netdev;
131 struct dsa_switch *ds = p->parent;
132
133 if (p->phy)
134 phy_stop(p->phy);
135
136 dev_mc_unsync(master, dev);
137 dev_uc_unsync(master, dev);
138 if (dev->flags & IFF_ALLMULTI)
139 dev_set_allmulti(master, -1);
140 if (dev->flags & IFF_PROMISC)
141 dev_set_promiscuity(master, -1);
142
143 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
144 dev_uc_del(master, dev->dev_addr);
145
146 if (ds->drv->port_disable)
147 ds->drv->port_disable(ds, p->port, p->phy);
148
149 if (ds->drv->port_stp_update)
150 ds->drv->port_stp_update(ds, p->port, BR_STATE_DISABLED);
151
152 return 0;
153}
154
155static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
156{
157 struct dsa_slave_priv *p = netdev_priv(dev);
158 struct net_device *master = p->parent->dst->master_netdev;
159
160 if (change & IFF_ALLMULTI)
161 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
162 if (change & IFF_PROMISC)
163 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
164}
165
166static void dsa_slave_set_rx_mode(struct net_device *dev)
167{
168 struct dsa_slave_priv *p = netdev_priv(dev);
169 struct net_device *master = p->parent->dst->master_netdev;
170
171 dev_mc_sync(master, dev);
172 dev_uc_sync(master, dev);
173}
174
175static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
176{
177 struct dsa_slave_priv *p = netdev_priv(dev);
178 struct net_device *master = p->parent->dst->master_netdev;
179 struct sockaddr *addr = a;
180 int err;
181
182 if (!is_valid_ether_addr(addr->sa_data))
183 return -EADDRNOTAVAIL;
184
185 if (!(dev->flags & IFF_UP))
186 goto out;
187
188 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
189 err = dev_uc_add(master, addr->sa_data);
190 if (err < 0)
191 return err;
192 }
193
194 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
195 dev_uc_del(master, dev->dev_addr);
196
197out:
198 ether_addr_copy(dev->dev_addr, addr->sa_data);
199
200 return 0;
201}
202
203static int dsa_bridge_check_vlan_range(struct dsa_switch *ds,
204 const struct net_device *bridge,
205 u16 vid_begin, u16 vid_end)
206{
207 struct dsa_slave_priv *p;
208 struct net_device *dev, *vlan_br;
209 DECLARE_BITMAP(members, DSA_MAX_PORTS);
210 DECLARE_BITMAP(untagged, DSA_MAX_PORTS);
211 u16 vid;
212 int member, err;
213
214 if (!ds->drv->vlan_getnext || !vid_begin)
215 return -EOPNOTSUPP;
216
217 vid = vid_begin - 1;
218
219 do {
220 err = ds->drv->vlan_getnext(ds, &vid, members, untagged);
221 if (err)
222 break;
223
224 if (vid > vid_end)
225 break;
226
227 member = find_first_bit(members, DSA_MAX_PORTS);
228 if (member == DSA_MAX_PORTS)
229 continue;
230
231 dev = ds->ports[member];
232 p = netdev_priv(dev);
233 vlan_br = p->bridge_dev;
234 if (vlan_br == bridge)
235 continue;
236
237 netdev_dbg(vlan_br, "hardware VLAN %d already in use\n", vid);
238 return -EOPNOTSUPP;
239 } while (vid < vid_end);
240
241 return err == -ENOENT ? 0 : err;
242}
243
244static int dsa_slave_port_vlan_add(struct net_device *dev,
245 struct switchdev_obj *obj)
246{
247 struct switchdev_obj_vlan *vlan = &obj->u.vlan;
248 struct dsa_slave_priv *p = netdev_priv(dev);
249 struct dsa_switch *ds = p->parent;
250 u16 vid;
251 int err;
252
253 switch (obj->trans) {
254 case SWITCHDEV_TRANS_PREPARE:
255 if (!ds->drv->port_vlan_add || !ds->drv->port_pvid_set)
256 return -EOPNOTSUPP;
257
258
259
260
261 err = dsa_bridge_check_vlan_range(ds, p->bridge_dev,
262 vlan->vid_begin,
263 vlan->vid_end);
264 if (err)
265 return err;
266 break;
267 case SWITCHDEV_TRANS_COMMIT:
268 for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
269 err = ds->drv->port_vlan_add(ds, p->port, vid,
270 vlan->flags &
271 BRIDGE_VLAN_INFO_UNTAGGED);
272 if (!err && vlan->flags & BRIDGE_VLAN_INFO_PVID)
273 err = ds->drv->port_pvid_set(ds, p->port, vid);
274 if (err)
275 return err;
276 }
277 break;
278 default:
279 return -EOPNOTSUPP;
280 }
281
282 return 0;
283}
284
285static int dsa_slave_port_vlan_del(struct net_device *dev,
286 struct switchdev_obj *obj)
287{
288 struct switchdev_obj_vlan *vlan = &obj->u.vlan;
289 struct dsa_slave_priv *p = netdev_priv(dev);
290 struct dsa_switch *ds = p->parent;
291 u16 vid;
292 int err;
293
294 if (!ds->drv->port_vlan_del)
295 return -EOPNOTSUPP;
296
297 for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
298 err = ds->drv->port_vlan_del(ds, p->port, vid);
299 if (err)
300 return err;
301 }
302
303 return 0;
304}
305
306static int dsa_slave_port_vlan_dump(struct net_device *dev,
307 struct switchdev_obj *obj)
308{
309 struct switchdev_obj_vlan *vlan = &obj->u.vlan;
310 struct dsa_slave_priv *p = netdev_priv(dev);
311 struct dsa_switch *ds = p->parent;
312 DECLARE_BITMAP(members, DSA_MAX_PORTS);
313 DECLARE_BITMAP(untagged, DSA_MAX_PORTS);
314 u16 pvid, vid = 0;
315 int err;
316
317 if (!ds->drv->vlan_getnext || !ds->drv->port_pvid_get)
318 return -EOPNOTSUPP;
319
320 err = ds->drv->port_pvid_get(ds, p->port, &pvid);
321 if (err)
322 return err;
323
324 for (;;) {
325 err = ds->drv->vlan_getnext(ds, &vid, members, untagged);
326 if (err)
327 break;
328
329 if (!test_bit(p->port, members))
330 continue;
331
332 memset(vlan, 0, sizeof(*vlan));
333 vlan->vid_begin = vlan->vid_end = vid;
334
335 if (vid == pvid)
336 vlan->flags |= BRIDGE_VLAN_INFO_PVID;
337
338 if (test_bit(p->port, untagged))
339 vlan->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
340
341 err = obj->cb(dev, obj);
342 if (err)
343 break;
344 }
345
346 return err == -ENOENT ? 0 : err;
347}
348
349static int dsa_slave_port_fdb_add(struct net_device *dev,
350 struct switchdev_obj *obj)
351{
352 struct switchdev_obj_fdb *fdb = &obj->u.fdb;
353 struct dsa_slave_priv *p = netdev_priv(dev);
354 struct dsa_switch *ds = p->parent;
355 int ret = -EOPNOTSUPP;
356
357 if (obj->trans == SWITCHDEV_TRANS_PREPARE)
358 ret = ds->drv->port_fdb_add ? 0 : -EOPNOTSUPP;
359 else if (obj->trans == SWITCHDEV_TRANS_COMMIT)
360 ret = ds->drv->port_fdb_add(ds, p->port, fdb->addr, fdb->vid);
361
362 return ret;
363}
364
365static int dsa_slave_port_fdb_del(struct net_device *dev,
366 struct switchdev_obj *obj)
367{
368 struct switchdev_obj_fdb *fdb = &obj->u.fdb;
369 struct dsa_slave_priv *p = netdev_priv(dev);
370 struct dsa_switch *ds = p->parent;
371 int ret = -EOPNOTSUPP;
372
373 if (ds->drv->port_fdb_del)
374 ret = ds->drv->port_fdb_del(ds, p->port, fdb->addr, fdb->vid);
375
376 return ret;
377}
378
379static int dsa_slave_port_fdb_dump(struct net_device *dev,
380 struct switchdev_obj *obj)
381{
382 struct dsa_slave_priv *p = netdev_priv(dev);
383 struct dsa_switch *ds = p->parent;
384 unsigned char addr[ETH_ALEN] = { 0 };
385 u16 vid = 0;
386 int ret;
387
388 if (!ds->drv->port_fdb_getnext)
389 return -EOPNOTSUPP;
390
391 for (;;) {
392 bool is_static;
393
394 ret = ds->drv->port_fdb_getnext(ds, p->port, addr, &vid,
395 &is_static);
396 if (ret < 0)
397 break;
398
399 obj->u.fdb.addr = addr;
400 obj->u.fdb.vid = vid;
401 obj->u.fdb.ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
402
403 ret = obj->cb(dev, obj);
404 if (ret < 0)
405 break;
406 }
407
408 return ret == -ENOENT ? 0 : ret;
409}
410
411static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
412{
413 struct dsa_slave_priv *p = netdev_priv(dev);
414
415 if (p->phy != NULL)
416 return phy_mii_ioctl(p->phy, ifr, cmd);
417
418 return -EOPNOTSUPP;
419}
420
421
422
423
424
425static u32 dsa_slave_br_port_mask(struct dsa_switch *ds,
426 struct net_device *bridge)
427{
428 struct dsa_slave_priv *p;
429 unsigned int port;
430 u32 mask = 0;
431
432 for (port = 0; port < DSA_MAX_PORTS; port++) {
433 if (!dsa_is_port_initialized(ds, port))
434 continue;
435
436 p = netdev_priv(ds->ports[port]);
437
438 if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT &&
439 p->bridge_dev == bridge)
440 mask |= 1 << port;
441 }
442
443 return mask;
444}
445
446static int dsa_slave_stp_update(struct net_device *dev, u8 state)
447{
448 struct dsa_slave_priv *p = netdev_priv(dev);
449 struct dsa_switch *ds = p->parent;
450 int ret = -EOPNOTSUPP;
451
452 if (ds->drv->port_stp_update)
453 ret = ds->drv->port_stp_update(ds, p->port, state);
454
455 return ret;
456}
457
458static int dsa_slave_port_attr_set(struct net_device *dev,
459 struct switchdev_attr *attr)
460{
461 struct dsa_slave_priv *p = netdev_priv(dev);
462 struct dsa_switch *ds = p->parent;
463 int ret;
464
465 switch (attr->id) {
466 case SWITCHDEV_ATTR_PORT_STP_STATE:
467 if (attr->trans == SWITCHDEV_TRANS_PREPARE)
468 ret = ds->drv->port_stp_update ? 0 : -EOPNOTSUPP;
469 else
470 ret = ds->drv->port_stp_update(ds, p->port,
471 attr->u.stp_state);
472 break;
473 default:
474 ret = -EOPNOTSUPP;
475 break;
476 }
477
478 return ret;
479}
480
481static int dsa_slave_port_obj_add(struct net_device *dev,
482 struct switchdev_obj *obj)
483{
484 int err;
485
486
487
488
489
490
491 switch (obj->id) {
492 case SWITCHDEV_OBJ_PORT_FDB:
493 err = dsa_slave_port_fdb_add(dev, obj);
494 break;
495 case SWITCHDEV_OBJ_PORT_VLAN:
496 err = dsa_slave_port_vlan_add(dev, obj);
497 break;
498 default:
499 err = -EOPNOTSUPP;
500 break;
501 }
502
503 return err;
504}
505
506static int dsa_slave_port_obj_del(struct net_device *dev,
507 struct switchdev_obj *obj)
508{
509 int err;
510
511 switch (obj->id) {
512 case SWITCHDEV_OBJ_PORT_FDB:
513 err = dsa_slave_port_fdb_del(dev, obj);
514 break;
515 case SWITCHDEV_OBJ_PORT_VLAN:
516 err = dsa_slave_port_vlan_del(dev, obj);
517 break;
518 default:
519 err = -EOPNOTSUPP;
520 break;
521 }
522
523 return err;
524}
525
526static int dsa_slave_port_obj_dump(struct net_device *dev,
527 struct switchdev_obj *obj)
528{
529 int err;
530
531 switch (obj->id) {
532 case SWITCHDEV_OBJ_PORT_FDB:
533 err = dsa_slave_port_fdb_dump(dev, obj);
534 break;
535 case SWITCHDEV_OBJ_PORT_VLAN:
536 err = dsa_slave_port_vlan_dump(dev, obj);
537 break;
538 default:
539 err = -EOPNOTSUPP;
540 break;
541 }
542
543 return err;
544}
545
546static int dsa_slave_bridge_port_join(struct net_device *dev,
547 struct net_device *br)
548{
549 struct dsa_slave_priv *p = netdev_priv(dev);
550 struct dsa_switch *ds = p->parent;
551 int ret = -EOPNOTSUPP;
552
553 p->bridge_dev = br;
554
555 if (ds->drv->port_join_bridge)
556 ret = ds->drv->port_join_bridge(ds, p->port,
557 dsa_slave_br_port_mask(ds, br));
558
559 return ret;
560}
561
562static int dsa_slave_bridge_port_leave(struct net_device *dev)
563{
564 struct dsa_slave_priv *p = netdev_priv(dev);
565 struct dsa_switch *ds = p->parent;
566 int ret = -EOPNOTSUPP;
567
568
569 if (ds->drv->port_leave_bridge)
570 ret = ds->drv->port_leave_bridge(ds, p->port,
571 dsa_slave_br_port_mask(ds, p->bridge_dev));
572
573 p->bridge_dev = NULL;
574
575
576
577
578 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
579
580 return ret;
581}
582
583static int dsa_slave_port_attr_get(struct net_device *dev,
584 struct switchdev_attr *attr)
585{
586 struct dsa_slave_priv *p = netdev_priv(dev);
587 struct dsa_switch *ds = p->parent;
588
589 switch (attr->id) {
590 case SWITCHDEV_ATTR_PORT_PARENT_ID:
591 attr->u.ppid.id_len = sizeof(ds->index);
592 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
593 break;
594 default:
595 return -EOPNOTSUPP;
596 }
597
598 return 0;
599}
600
601static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
602 struct sk_buff *skb)
603{
604#ifdef CONFIG_NET_POLL_CONTROLLER
605 if (p->netpoll)
606 netpoll_send_skb(p->netpoll, skb);
607#else
608 BUG();
609#endif
610 return NETDEV_TX_OK;
611}
612
613static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
614{
615 struct dsa_slave_priv *p = netdev_priv(dev);
616 struct sk_buff *nskb;
617
618 dev->stats.tx_packets++;
619 dev->stats.tx_bytes += skb->len;
620
621
622 nskb = p->xmit(skb, dev);
623 if (!nskb)
624 return NETDEV_TX_OK;
625
626
627
628
629 if (unlikely(netpoll_tx_running(dev)))
630 return dsa_netpoll_send_skb(p, nskb);
631
632
633
634
635 nskb->dev = p->parent->dst->master_netdev;
636 dev_queue_xmit(nskb);
637
638 return NETDEV_TX_OK;
639}
640
641static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
642 struct net_device *dev)
643{
644
645 return skb;
646}
647
648
649
650static int
651dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
652{
653 struct dsa_slave_priv *p = netdev_priv(dev);
654 int err;
655
656 err = -EOPNOTSUPP;
657 if (p->phy != NULL) {
658 err = phy_read_status(p->phy);
659 if (err == 0)
660 err = phy_ethtool_gset(p->phy, cmd);
661 }
662
663 return err;
664}
665
666static int
667dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
668{
669 struct dsa_slave_priv *p = netdev_priv(dev);
670
671 if (p->phy != NULL)
672 return phy_ethtool_sset(p->phy, cmd);
673
674 return -EOPNOTSUPP;
675}
676
677static void dsa_slave_get_drvinfo(struct net_device *dev,
678 struct ethtool_drvinfo *drvinfo)
679{
680 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
681 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
682 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
683 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
684}
685
686static int dsa_slave_get_regs_len(struct net_device *dev)
687{
688 struct dsa_slave_priv *p = netdev_priv(dev);
689 struct dsa_switch *ds = p->parent;
690
691 if (ds->drv->get_regs_len)
692 return ds->drv->get_regs_len(ds, p->port);
693
694 return -EOPNOTSUPP;
695}
696
697static void
698dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
699{
700 struct dsa_slave_priv *p = netdev_priv(dev);
701 struct dsa_switch *ds = p->parent;
702
703 if (ds->drv->get_regs)
704 ds->drv->get_regs(ds, p->port, regs, _p);
705}
706
707static int dsa_slave_nway_reset(struct net_device *dev)
708{
709 struct dsa_slave_priv *p = netdev_priv(dev);
710
711 if (p->phy != NULL)
712 return genphy_restart_aneg(p->phy);
713
714 return -EOPNOTSUPP;
715}
716
717static u32 dsa_slave_get_link(struct net_device *dev)
718{
719 struct dsa_slave_priv *p = netdev_priv(dev);
720
721 if (p->phy != NULL) {
722 genphy_update_link(p->phy);
723 return p->phy->link;
724 }
725
726 return -EOPNOTSUPP;
727}
728
729static int dsa_slave_get_eeprom_len(struct net_device *dev)
730{
731 struct dsa_slave_priv *p = netdev_priv(dev);
732 struct dsa_switch *ds = p->parent;
733
734 if (ds->pd->eeprom_len)
735 return ds->pd->eeprom_len;
736
737 if (ds->drv->get_eeprom_len)
738 return ds->drv->get_eeprom_len(ds);
739
740 return 0;
741}
742
743static int dsa_slave_get_eeprom(struct net_device *dev,
744 struct ethtool_eeprom *eeprom, u8 *data)
745{
746 struct dsa_slave_priv *p = netdev_priv(dev);
747 struct dsa_switch *ds = p->parent;
748
749 if (ds->drv->get_eeprom)
750 return ds->drv->get_eeprom(ds, eeprom, data);
751
752 return -EOPNOTSUPP;
753}
754
755static int dsa_slave_set_eeprom(struct net_device *dev,
756 struct ethtool_eeprom *eeprom, u8 *data)
757{
758 struct dsa_slave_priv *p = netdev_priv(dev);
759 struct dsa_switch *ds = p->parent;
760
761 if (ds->drv->set_eeprom)
762 return ds->drv->set_eeprom(ds, eeprom, data);
763
764 return -EOPNOTSUPP;
765}
766
767static void dsa_slave_get_strings(struct net_device *dev,
768 uint32_t stringset, uint8_t *data)
769{
770 struct dsa_slave_priv *p = netdev_priv(dev);
771 struct dsa_switch *ds = p->parent;
772
773 if (stringset == ETH_SS_STATS) {
774 int len = ETH_GSTRING_LEN;
775
776 strncpy(data, "tx_packets", len);
777 strncpy(data + len, "tx_bytes", len);
778 strncpy(data + 2 * len, "rx_packets", len);
779 strncpy(data + 3 * len, "rx_bytes", len);
780 if (ds->drv->get_strings != NULL)
781 ds->drv->get_strings(ds, p->port, data + 4 * len);
782 }
783}
784
785static void dsa_slave_get_ethtool_stats(struct net_device *dev,
786 struct ethtool_stats *stats,
787 uint64_t *data)
788{
789 struct dsa_slave_priv *p = netdev_priv(dev);
790 struct dsa_switch *ds = p->parent;
791
792 data[0] = p->dev->stats.tx_packets;
793 data[1] = p->dev->stats.tx_bytes;
794 data[2] = p->dev->stats.rx_packets;
795 data[3] = p->dev->stats.rx_bytes;
796 if (ds->drv->get_ethtool_stats != NULL)
797 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
798}
799
800static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
801{
802 struct dsa_slave_priv *p = netdev_priv(dev);
803 struct dsa_switch *ds = p->parent;
804
805 if (sset == ETH_SS_STATS) {
806 int count;
807
808 count = 4;
809 if (ds->drv->get_sset_count != NULL)
810 count += ds->drv->get_sset_count(ds);
811
812 return count;
813 }
814
815 return -EOPNOTSUPP;
816}
817
818static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
819{
820 struct dsa_slave_priv *p = netdev_priv(dev);
821 struct dsa_switch *ds = p->parent;
822
823 if (ds->drv->get_wol)
824 ds->drv->get_wol(ds, p->port, w);
825}
826
827static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
828{
829 struct dsa_slave_priv *p = netdev_priv(dev);
830 struct dsa_switch *ds = p->parent;
831 int ret = -EOPNOTSUPP;
832
833 if (ds->drv->set_wol)
834 ret = ds->drv->set_wol(ds, p->port, w);
835
836 return ret;
837}
838
839static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
840{
841 struct dsa_slave_priv *p = netdev_priv(dev);
842 struct dsa_switch *ds = p->parent;
843 int ret;
844
845 if (!ds->drv->set_eee)
846 return -EOPNOTSUPP;
847
848 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
849 if (ret)
850 return ret;
851
852 if (p->phy)
853 ret = phy_ethtool_set_eee(p->phy, e);
854
855 return ret;
856}
857
858static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
859{
860 struct dsa_slave_priv *p = netdev_priv(dev);
861 struct dsa_switch *ds = p->parent;
862 int ret;
863
864 if (!ds->drv->get_eee)
865 return -EOPNOTSUPP;
866
867 ret = ds->drv->get_eee(ds, p->port, e);
868 if (ret)
869 return ret;
870
871 if (p->phy)
872 ret = phy_ethtool_get_eee(p->phy, e);
873
874 return ret;
875}
876
877#ifdef CONFIG_NET_POLL_CONTROLLER
878static int dsa_slave_netpoll_setup(struct net_device *dev,
879 struct netpoll_info *ni)
880{
881 struct dsa_slave_priv *p = netdev_priv(dev);
882 struct dsa_switch *ds = p->parent;
883 struct net_device *master = ds->dst->master_netdev;
884 struct netpoll *netpoll;
885 int err = 0;
886
887 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
888 if (!netpoll)
889 return -ENOMEM;
890
891 err = __netpoll_setup(netpoll, master);
892 if (err) {
893 kfree(netpoll);
894 goto out;
895 }
896
897 p->netpoll = netpoll;
898out:
899 return err;
900}
901
902static void dsa_slave_netpoll_cleanup(struct net_device *dev)
903{
904 struct dsa_slave_priv *p = netdev_priv(dev);
905 struct netpoll *netpoll = p->netpoll;
906
907 if (!netpoll)
908 return;
909
910 p->netpoll = NULL;
911
912 __netpoll_free_async(netpoll);
913}
914
915static void dsa_slave_poll_controller(struct net_device *dev)
916{
917}
918#endif
919
920static const struct ethtool_ops dsa_slave_ethtool_ops = {
921 .get_settings = dsa_slave_get_settings,
922 .set_settings = dsa_slave_set_settings,
923 .get_drvinfo = dsa_slave_get_drvinfo,
924 .get_regs_len = dsa_slave_get_regs_len,
925 .get_regs = dsa_slave_get_regs,
926 .nway_reset = dsa_slave_nway_reset,
927 .get_link = dsa_slave_get_link,
928 .get_eeprom_len = dsa_slave_get_eeprom_len,
929 .get_eeprom = dsa_slave_get_eeprom,
930 .set_eeprom = dsa_slave_set_eeprom,
931 .get_strings = dsa_slave_get_strings,
932 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
933 .get_sset_count = dsa_slave_get_sset_count,
934 .set_wol = dsa_slave_set_wol,
935 .get_wol = dsa_slave_get_wol,
936 .set_eee = dsa_slave_set_eee,
937 .get_eee = dsa_slave_get_eee,
938};
939
940static const struct net_device_ops dsa_slave_netdev_ops = {
941 .ndo_open = dsa_slave_open,
942 .ndo_stop = dsa_slave_close,
943 .ndo_start_xmit = dsa_slave_xmit,
944 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
945 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
946 .ndo_set_mac_address = dsa_slave_set_mac_address,
947 .ndo_fdb_add = switchdev_port_fdb_add,
948 .ndo_fdb_del = switchdev_port_fdb_del,
949 .ndo_fdb_dump = switchdev_port_fdb_dump,
950 .ndo_do_ioctl = dsa_slave_ioctl,
951 .ndo_get_iflink = dsa_slave_get_iflink,
952#ifdef CONFIG_NET_POLL_CONTROLLER
953 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
954 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
955 .ndo_poll_controller = dsa_slave_poll_controller,
956#endif
957 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
958 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
959 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
960};
961
962static const struct switchdev_ops dsa_slave_switchdev_ops = {
963 .switchdev_port_attr_get = dsa_slave_port_attr_get,
964 .switchdev_port_attr_set = dsa_slave_port_attr_set,
965 .switchdev_port_obj_add = dsa_slave_port_obj_add,
966 .switchdev_port_obj_del = dsa_slave_port_obj_del,
967 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
968};
969
970static void dsa_slave_adjust_link(struct net_device *dev)
971{
972 struct dsa_slave_priv *p = netdev_priv(dev);
973 struct dsa_switch *ds = p->parent;
974 unsigned int status_changed = 0;
975
976 if (p->old_link != p->phy->link) {
977 status_changed = 1;
978 p->old_link = p->phy->link;
979 }
980
981 if (p->old_duplex != p->phy->duplex) {
982 status_changed = 1;
983 p->old_duplex = p->phy->duplex;
984 }
985
986 if (p->old_pause != p->phy->pause) {
987 status_changed = 1;
988 p->old_pause = p->phy->pause;
989 }
990
991 if (ds->drv->adjust_link && status_changed)
992 ds->drv->adjust_link(ds, p->port, p->phy);
993
994 if (status_changed)
995 phy_print_status(p->phy);
996}
997
998static int dsa_slave_fixed_link_update(struct net_device *dev,
999 struct fixed_phy_status *status)
1000{
1001 struct dsa_slave_priv *p = netdev_priv(dev);
1002 struct dsa_switch *ds = p->parent;
1003
1004 if (ds->drv->fixed_link_update)
1005 ds->drv->fixed_link_update(ds, p->port, status);
1006
1007 return 0;
1008}
1009
1010
1011static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
1012 struct net_device *slave_dev,
1013 int addr)
1014{
1015 struct dsa_switch *ds = p->parent;
1016
1017 p->phy = ds->slave_mii_bus->phy_map[addr];
1018 if (!p->phy)
1019 return -ENODEV;
1020
1021
1022 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1023 p->phy_interface = p->phy->interface;
1024 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
1025 p->phy_interface);
1026
1027 return 0;
1028}
1029
1030static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
1031 struct net_device *slave_dev)
1032{
1033 struct dsa_switch *ds = p->parent;
1034 struct dsa_chip_data *cd = ds->pd;
1035 struct device_node *phy_dn, *port_dn;
1036 bool phy_is_fixed = false;
1037 u32 phy_flags = 0;
1038 int mode, ret;
1039
1040 port_dn = cd->port_dn[p->port];
1041 mode = of_get_phy_mode(port_dn);
1042 if (mode < 0)
1043 mode = PHY_INTERFACE_MODE_NA;
1044 p->phy_interface = mode;
1045
1046 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1047 if (of_phy_is_fixed_link(port_dn)) {
1048
1049
1050
1051 ret = of_phy_register_fixed_link(port_dn);
1052 if (ret) {
1053 netdev_err(slave_dev, "failed to register fixed PHY\n");
1054 return ret;
1055 }
1056 phy_is_fixed = true;
1057 phy_dn = port_dn;
1058 }
1059
1060 if (ds->drv->get_phy_flags)
1061 phy_flags = ds->drv->get_phy_flags(ds, p->port);
1062
1063 if (phy_dn) {
1064 ret = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
1065
1066
1067
1068
1069
1070 if (!phy_is_fixed && ret >= 0 &&
1071 (ds->phys_mii_mask & (1 << ret))) {
1072 ret = dsa_slave_phy_connect(p, slave_dev, ret);
1073 if (ret)
1074 return ret;
1075 } else {
1076 p->phy = of_phy_connect(slave_dev, phy_dn,
1077 dsa_slave_adjust_link,
1078 phy_flags,
1079 p->phy_interface);
1080 }
1081 }
1082
1083 if (p->phy && phy_is_fixed)
1084 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
1085
1086
1087
1088
1089 if (!p->phy) {
1090 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
1091 if (ret)
1092 return ret;
1093 } else {
1094 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
1095 p->phy->addr, p->phy->drv->name);
1096 }
1097
1098 return 0;
1099}
1100
1101static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1102static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1103 struct netdev_queue *txq,
1104 void *_unused)
1105{
1106 lockdep_set_class(&txq->_xmit_lock,
1107 &dsa_slave_netdev_xmit_lock_key);
1108}
1109
1110int dsa_slave_suspend(struct net_device *slave_dev)
1111{
1112 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1113
1114 if (p->phy) {
1115 phy_stop(p->phy);
1116 p->old_pause = -1;
1117 p->old_link = -1;
1118 p->old_duplex = -1;
1119 phy_suspend(p->phy);
1120 }
1121
1122 return 0;
1123}
1124
1125int dsa_slave_resume(struct net_device *slave_dev)
1126{
1127 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1128
1129 netif_device_attach(slave_dev);
1130
1131 if (p->phy) {
1132 phy_resume(p->phy);
1133 phy_start(p->phy);
1134 }
1135
1136 return 0;
1137}
1138
1139int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1140 int port, char *name)
1141{
1142 struct net_device *master = ds->dst->master_netdev;
1143 struct net_device *slave_dev;
1144 struct dsa_slave_priv *p;
1145 int ret;
1146
1147 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1148 NET_NAME_UNKNOWN, ether_setup);
1149 if (slave_dev == NULL)
1150 return -ENOMEM;
1151
1152 slave_dev->features = master->vlan_features;
1153 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1154 eth_hw_addr_inherit(slave_dev, master);
1155 slave_dev->priv_flags |= IFF_NO_QUEUE;
1156 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1157 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1158
1159 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1160 NULL);
1161
1162 SET_NETDEV_DEV(slave_dev, parent);
1163 slave_dev->dev.of_node = ds->pd->port_dn[port];
1164 slave_dev->vlan_features = master->vlan_features;
1165
1166 p = netdev_priv(slave_dev);
1167 p->dev = slave_dev;
1168 p->parent = ds;
1169 p->port = port;
1170
1171 switch (ds->dst->tag_protocol) {
1172#ifdef CONFIG_NET_DSA_TAG_DSA
1173 case DSA_TAG_PROTO_DSA:
1174 p->xmit = dsa_netdev_ops.xmit;
1175 break;
1176#endif
1177#ifdef CONFIG_NET_DSA_TAG_EDSA
1178 case DSA_TAG_PROTO_EDSA:
1179 p->xmit = edsa_netdev_ops.xmit;
1180 break;
1181#endif
1182#ifdef CONFIG_NET_DSA_TAG_TRAILER
1183 case DSA_TAG_PROTO_TRAILER:
1184 p->xmit = trailer_netdev_ops.xmit;
1185 break;
1186#endif
1187#ifdef CONFIG_NET_DSA_TAG_BRCM
1188 case DSA_TAG_PROTO_BRCM:
1189 p->xmit = brcm_netdev_ops.xmit;
1190 break;
1191#endif
1192 default:
1193 p->xmit = dsa_slave_notag_xmit;
1194 break;
1195 }
1196
1197 p->old_pause = -1;
1198 p->old_link = -1;
1199 p->old_duplex = -1;
1200
1201 ret = dsa_slave_phy_setup(p, slave_dev);
1202 if (ret) {
1203 free_netdev(slave_dev);
1204 return ret;
1205 }
1206
1207 ds->ports[port] = slave_dev;
1208 ret = register_netdev(slave_dev);
1209 if (ret) {
1210 netdev_err(master, "error %d registering interface %s\n",
1211 ret, slave_dev->name);
1212 phy_disconnect(p->phy);
1213 ds->ports[port] = NULL;
1214 free_netdev(slave_dev);
1215 return ret;
1216 }
1217
1218 netif_carrier_off(slave_dev);
1219
1220 return 0;
1221}
1222
1223static bool dsa_slave_dev_check(struct net_device *dev)
1224{
1225 return dev->netdev_ops == &dsa_slave_netdev_ops;
1226}
1227
1228static int dsa_slave_master_changed(struct net_device *dev)
1229{
1230 struct net_device *master = netdev_master_upper_dev_get(dev);
1231 struct dsa_slave_priv *p = netdev_priv(dev);
1232 int err = 0;
1233
1234 if (master && master->rtnl_link_ops &&
1235 !strcmp(master->rtnl_link_ops->kind, "bridge"))
1236 err = dsa_slave_bridge_port_join(dev, master);
1237 else if (dsa_port_is_bridged(p))
1238 err = dsa_slave_bridge_port_leave(dev);
1239
1240 return err;
1241}
1242
1243int dsa_slave_netdevice_event(struct notifier_block *unused,
1244 unsigned long event, void *ptr)
1245{
1246 struct net_device *dev;
1247 int err = 0;
1248
1249 switch (event) {
1250 case NETDEV_CHANGEUPPER:
1251 dev = netdev_notifier_info_to_dev(ptr);
1252 if (!dsa_slave_dev_check(dev))
1253 goto out;
1254
1255 err = dsa_slave_master_changed(dev);
1256 if (err)
1257 netdev_warn(dev, "failed to reflect master change\n");
1258
1259 break;
1260 }
1261
1262out:
1263 return NOTIFY_DONE;
1264}
1265
