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net: Add support for filtering neigh dump by master device
[deliverable/linux.git] / net / dsa / slave.c
CommitLineData
91da11f8
LB		 1/*
2 * net/dsa/slave.c - Slave device handling
e84665c9 3 * Copyright (c) 2008-2009 Marvell Semiconductor
91da11f8
LB		 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>
df02c6ff 12#include <linux/etherdevice.h>
b73adef6 13#include <linux/netdevice.h>
91da11f8 14#include <linux/phy.h>
a2820543 15#include <linux/phy_fixed.h>
0d8bcdd3
FF		 16#include <linux/of_net.h>
17#include <linux/of_mdio.h>
b73adef6 18#include <net/rtnetlink.h>
98237d43 19#include <net/switchdev.h>
b73adef6 20#include <linux/if_bridge.h>
04ff53f9 21#include <linux/netpoll.h>
91da11f8
LB		 22#include "dsa_priv.h"
23
24/* slave mii_bus handling ***************************************************/
25static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
26{
27 struct dsa_switch *ds = bus->priv;
28
0d8bcdd3 29 if (ds->phys_mii_mask & (1 << addr))
91da11f8
LB		 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
0d8bcdd3 39 if (ds->phys_mii_mask & (1 << addr))
91da11f8
LB		 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;
f490be04
FF		 51 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x",
52 ds->index, ds->pd->sw_addr);
b4d2394d 53 ds->slave_mii_bus->parent = ds->master_dev;
24df8986 54 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
91da11f8
LB		 55}
56
57
58/* slave device handling ****************************************************/
abd2be00 59static int dsa_slave_get_iflink(const struct net_device *dev)
c0840801
LB		 60{
61 struct dsa_slave_priv *p = netdev_priv(dev);
c0840801 62
abd2be00 63 return p->parent->dst->master_netdev->ifindex;
c0840801
LB		 64}
65
b73adef6
FF		 66static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p)
67{
68 return !!p->bridge_dev;
69}
70
91da11f8
LB		 71static int dsa_slave_open(struct net_device *dev)
72{
df02c6ff 73 struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9 74 struct net_device *master = p->parent->dst->master_netdev;
b2f2af21 75 struct dsa_switch *ds = p->parent;
b73adef6
FF		 76 u8 stp_state = dsa_port_is_bridged(p) ?
77 BR_STATE_BLOCKING : BR_STATE_FORWARDING;
df02c6ff
LB		 78 int err;
79
80 if (!(master->flags & IFF_UP))
81 return -ENETDOWN;
82
8feedbb4 83 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
a748ee24 84 err = dev_uc_add(master, dev->dev_addr);
df02c6ff
LB		 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
b2f2af21
FF		 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
b73adef6
FF		 106 if (ds->drv->port_stp_update)
107 ds->drv->port_stp_update(ds, p->port, stp_state);
108
f7f1de51
FF		 109 if (p->phy)
110 phy_start(p->phy);
111
91da11f8 112 return 0;
df02c6ff 113
b2f2af21
FF		 114clear_promisc:
115 if (dev->flags & IFF_PROMISC)
4fdeddfe 116 dev_set_promiscuity(master, -1);
df02c6ff
LB		 117clear_allmulti:
118 if (dev->flags & IFF_ALLMULTI)
119 dev_set_allmulti(master, -1);
120del_unicast:
8feedbb4 121 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
a748ee24 122 dev_uc_del(master, dev->dev_addr);
df02c6ff
LB		 123out:
124 return err;
91da11f8
LB		 125}
126
127static int dsa_slave_close(struct net_device *dev)
128{
df02c6ff 129 struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9 130 struct net_device *master = p->parent->dst->master_netdev;
b2f2af21 131 struct dsa_switch *ds = p->parent;
df02c6ff 132
f7f1de51
FF		 133 if (p->phy)
134 phy_stop(p->phy);
135
df02c6ff 136 dev_mc_unsync(master, dev);
a748ee24 137 dev_uc_unsync(master, dev);
df02c6ff
LB		 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
8feedbb4 143 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
a748ee24 144 dev_uc_del(master, dev->dev_addr);
df02c6ff 145
b2f2af21
FF		 146 if (ds->drv->port_disable)
147 ds->drv->port_disable(ds, p->port, p->phy);
148
b73adef6
FF		 149 if (ds->drv->port_stp_update)
150 ds->drv->port_stp_update(ds, p->port, BR_STATE_DISABLED);
151
91da11f8
LB		 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);
e84665c9 158 struct net_device *master = p->parent->dst->master_netdev;
91da11f8
LB		 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);
e84665c9 169 struct net_device *master = p->parent->dst->master_netdev;
91da11f8
LB		 170
171 dev_mc_sync(master, dev);
a748ee24 172 dev_uc_sync(master, dev);
91da11f8
LB		 173}
174
df02c6ff 175static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
91da11f8 176{
df02c6ff 177 struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9 178 struct net_device *master = p->parent->dst->master_netdev;
df02c6ff
LB		 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
8feedbb4 188 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
a748ee24 189 err = dev_uc_add(master, addr->sa_data);
df02c6ff
LB		 190 if (err < 0)
191 return err;
192 }
193
8feedbb4 194 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
a748ee24 195 dev_uc_del(master, dev->dev_addr);
df02c6ff
LB		 196
197out:
d08f161a 198 ether_addr_copy(dev->dev_addr, addr->sa_data);
91da11f8
LB		 199
200 return 0;
201}
202
11149536
VD		 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,
ab069002 245 const struct switchdev_obj_vlan *vlan,
f8db8348 246 struct switchdev_trans *trans)
11149536 247{
11149536
VD		 248 struct dsa_slave_priv *p = netdev_priv(dev);
249 struct dsa_switch *ds = p->parent;
250 u16 vid;
251 int err;
252
79a62eb2 253 if (switchdev_trans_ph_prepare(trans)) {
11149536
VD		 254 if (!ds->drv->port_vlan_add || !ds->drv->port_pvid_set)
255 return -EOPNOTSUPP;
256
257 /* If the requested port doesn't belong to the same bridge as
258 * the VLAN members, fallback to software VLAN (hopefully).
259 */
260 err = dsa_bridge_check_vlan_range(ds, p->bridge_dev,
261 vlan->vid_begin,
262 vlan->vid_end);
263 if (err)
264 return err;
79a62eb2 265 } else {
11149536
VD		 266 for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
267 err = ds->drv->port_vlan_add(ds, p->port, vid,
268 vlan->flags &
269 BRIDGE_VLAN_INFO_UNTAGGED);
270 if (!err && vlan->flags & BRIDGE_VLAN_INFO_PVID)
271 err = ds->drv->port_pvid_set(ds, p->port, vid);
272 if (err)
273 return err;
274 }
11149536
VD		 275 }
276
277 return 0;
278}
279
280static int dsa_slave_port_vlan_del(struct net_device *dev,
ab069002 281 const struct switchdev_obj_vlan *vlan)
11149536 282{
11149536
VD		 283 struct dsa_slave_priv *p = netdev_priv(dev);
284 struct dsa_switch *ds = p->parent;
285 u16 vid;
286 int err;
287
288 if (!ds->drv->port_vlan_del)
289 return -EOPNOTSUPP;
290
291 for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
292 err = ds->drv->port_vlan_del(ds, p->port, vid);
293 if (err)
294 return err;
295 }
296
297 return 0;
298}
299
300static int dsa_slave_port_vlan_dump(struct net_device *dev,
25f07adc
VD		 301 struct switchdev_obj_vlan *vlan,
302 int (*cb)(void *obj))
11149536 303{
11149536
VD		 304 struct dsa_slave_priv *p = netdev_priv(dev);
305 struct dsa_switch *ds = p->parent;
306 DECLARE_BITMAP(members, DSA_MAX_PORTS);
307 DECLARE_BITMAP(untagged, DSA_MAX_PORTS);
308 u16 pvid, vid = 0;
309 int err;
310
311 if (!ds->drv->vlan_getnext || !ds->drv->port_pvid_get)
312 return -EOPNOTSUPP;
313
314 err = ds->drv->port_pvid_get(ds, p->port, &pvid);
315 if (err)
316 return err;
317
318 for (;;) {
319 err = ds->drv->vlan_getnext(ds, &vid, members, untagged);
320 if (err)
321 break;
322
323 if (!test_bit(p->port, members))
324 continue;
325
326 memset(vlan, 0, sizeof(*vlan));
327 vlan->vid_begin = vlan->vid_end = vid;
328
329 if (vid == pvid)
330 vlan->flags |= BRIDGE_VLAN_INFO_PVID;
331
332 if (test_bit(p->port, untagged))
333 vlan->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
334
25f07adc 335 err = cb(vlan);
11149536
VD		 336 if (err)
337 break;
338 }
339
340 return err == -ENOENT ? 0 : err;
341}
342
ba14d9eb 343static int dsa_slave_port_fdb_add(struct net_device *dev,
ab069002 344 const struct switchdev_obj_fdb *fdb,
f8db8348 345 struct switchdev_trans *trans)
cdf09697
DM		 346{
347 struct dsa_slave_priv *p = netdev_priv(dev);
348 struct dsa_switch *ds = p->parent;
349 int ret = -EOPNOTSUPP;
350
79a62eb2 351 if (switchdev_trans_ph_prepare(trans))
ba14d9eb 352 ret = ds->drv->port_fdb_add ? 0 : -EOPNOTSUPP;
79a62eb2 353 else
ba14d9eb 354 ret = ds->drv->port_fdb_add(ds, p->port, fdb->addr, fdb->vid);
cdf09697
DM		 355
356 return ret;
357}
358
ba14d9eb 359static int dsa_slave_port_fdb_del(struct net_device *dev,
ab069002 360 const struct switchdev_obj_fdb *fdb)
cdf09697
DM		 361{
362 struct dsa_slave_priv *p = netdev_priv(dev);
363 struct dsa_switch *ds = p->parent;
364 int ret = -EOPNOTSUPP;
365
2a778e1b 366 if (ds->drv->port_fdb_del)
ba14d9eb 367 ret = ds->drv->port_fdb_del(ds, p->port, fdb->addr, fdb->vid);
cdf09697
DM		 368
369 return ret;
370}
371
ba14d9eb 372static int dsa_slave_port_fdb_dump(struct net_device *dev,
25f07adc
VD		 373 struct switchdev_obj_fdb *fdb,
374 int (*cb)(void *obj))
cdf09697
DM		 375{
376 struct dsa_slave_priv *p = netdev_priv(dev);
377 struct dsa_switch *ds = p->parent;
378 unsigned char addr[ETH_ALEN] = { 0 };
2a778e1b 379 u16 vid = 0;
cdf09697
DM		 380 int ret;
381
2a778e1b 382 if (!ds->drv->port_fdb_getnext)
cdf09697
DM		 383 return -EOPNOTSUPP;
384
ba14d9eb 385 for (;;) {
cdf09697
DM		 386 bool is_static;
387
2a778e1b
VD		 388 ret = ds->drv->port_fdb_getnext(ds, p->port, addr, &vid,
389 &is_static);
cdf09697
DM		 390 if (ret < 0)
391 break;
392
25f07adc
VD		 393 fdb->addr = addr;
394 fdb->vid = vid;
395 fdb->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
cdf09697 396
25f07adc 397 ret = cb(fdb);
cdf09697
DM		 398 if (ret < 0)
399 break;
400 }
401
ba14d9eb 402 return ret == -ENOENT ? 0 : ret;
cdf09697
DM		 403}
404
91da11f8
LB		 405static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
406{
407 struct dsa_slave_priv *p = netdev_priv(dev);
91da11f8
LB		 408
409 if (p->phy != NULL)
28b04113 410 return phy_mii_ioctl(p->phy, ifr, cmd);
91da11f8
LB		 411
412 return -EOPNOTSUPP;
413}
414
b73adef6
FF		 415/* Return a bitmask of all ports being currently bridged within a given bridge
416 * device. Note that on leave, the mask will still return the bitmask of ports
417 * currently bridged, prior to port removal, and this is exactly what we want.
418 */
419static u32 dsa_slave_br_port_mask(struct dsa_switch *ds,
420 struct net_device *bridge)
421{
422 struct dsa_slave_priv *p;
423 unsigned int port;
424 u32 mask = 0;
425
426 for (port = 0; port < DSA_MAX_PORTS; port++) {
d79d2107 427 if (!dsa_is_port_initialized(ds, port))
b73adef6
FF		 428 continue;
429
430 p = netdev_priv(ds->ports[port]);
431
432 if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT &&
433 p->bridge_dev == bridge)
434 mask |= 1 << port;
435 }
436
437 return mask;
438}
439
440static int dsa_slave_stp_update(struct net_device *dev, u8 state)
441{
442 struct dsa_slave_priv *p = netdev_priv(dev);
443 struct dsa_switch *ds = p->parent;
444 int ret = -EOPNOTSUPP;
445
446 if (ds->drv->port_stp_update)
447 ret = ds->drv->port_stp_update(ds, p->port, state);
448
449 return ret;
450}
451
35636062 452static int dsa_slave_port_attr_set(struct net_device *dev,
7ea6eb3f
JP		 453 struct switchdev_attr *attr,
454 struct switchdev_trans *trans)
35636062
SF		 455{
456 int ret = 0;
457
458 switch (attr->id) {
459 case SWITCHDEV_ATTR_PORT_STP_STATE:
79a62eb2 460 if (switchdev_trans_ph_commit(trans))
42275bd8 461 ret = dsa_slave_stp_update(dev, attr->u.stp_state);
35636062
SF		 462 break;
463 default:
464 ret = -EOPNOTSUPP;
465 break;
466 }
467
468 return ret;
469}
470
ba14d9eb 471static int dsa_slave_port_obj_add(struct net_device *dev,
ab069002 472 enum switchdev_obj_id id, const void *obj,
7ea6eb3f 473 struct switchdev_trans *trans)
ba14d9eb
VD		 474{
475 int err;
476
477 /* For the prepare phase, ensure the full set of changes is feasable in
478 * one go in order to signal a failure properly. If an operation is not
479 * supported, return -EOPNOTSUPP.
480 */
481
ab069002 482 switch (id) {
ba14d9eb 483 case SWITCHDEV_OBJ_PORT_FDB:
f8db8348 484 err = dsa_slave_port_fdb_add(dev, obj, trans);
ba14d9eb 485 break;
11149536 486 case SWITCHDEV_OBJ_PORT_VLAN:
f8db8348 487 err = dsa_slave_port_vlan_add(dev, obj, trans);
11149536 488 break;
ba14d9eb
VD		 489 default:
490 err = -EOPNOTSUPP;
491 break;
492 }
493
494 return err;
495}
496
497static int dsa_slave_port_obj_del(struct net_device *dev,
ab069002 498 enum switchdev_obj_id id, const void *obj)
ba14d9eb
VD		 499{
500 int err;
501
ab069002 502 switch (id) {
ba14d9eb
VD		 503 case SWITCHDEV_OBJ_PORT_FDB:
504 err = dsa_slave_port_fdb_del(dev, obj);
505 break;
11149536
VD		 506 case SWITCHDEV_OBJ_PORT_VLAN:
507 err = dsa_slave_port_vlan_del(dev, obj);
508 break;
ba14d9eb
VD		 509 default:
510 err = -EOPNOTSUPP;
511 break;
512 }
513
514 return err;
515}
516
517static int dsa_slave_port_obj_dump(struct net_device *dev,
25f07adc
VD		 518 enum switchdev_obj_id id, void *obj,
519 int (*cb)(void *obj))
ba14d9eb
VD		 520{
521 int err;
522
25f07adc 523 switch (id) {
ba14d9eb 524 case SWITCHDEV_OBJ_PORT_FDB:
25f07adc 525 err = dsa_slave_port_fdb_dump(dev, obj, cb);
ba14d9eb 526 break;
11149536 527 case SWITCHDEV_OBJ_PORT_VLAN:
25f07adc 528 err = dsa_slave_port_vlan_dump(dev, obj, cb);
11149536 529 break;
ba14d9eb
VD		 530 default:
531 err = -EOPNOTSUPP;
532 break;
533 }
534
535 return err;
536}
537
b73adef6
FF		 538static int dsa_slave_bridge_port_join(struct net_device *dev,
539 struct net_device *br)
540{
541 struct dsa_slave_priv *p = netdev_priv(dev);
542 struct dsa_switch *ds = p->parent;
543 int ret = -EOPNOTSUPP;
544
545 p->bridge_dev = br;
546
547 if (ds->drv->port_join_bridge)
548 ret = ds->drv->port_join_bridge(ds, p->port,
549 dsa_slave_br_port_mask(ds, br));
550
551 return ret;
552}
553
554static int dsa_slave_bridge_port_leave(struct net_device *dev)
555{
556 struct dsa_slave_priv *p = netdev_priv(dev);
557 struct dsa_switch *ds = p->parent;
558 int ret = -EOPNOTSUPP;
559
560
561 if (ds->drv->port_leave_bridge)
562 ret = ds->drv->port_leave_bridge(ds, p->port,
563 dsa_slave_br_port_mask(ds, p->bridge_dev));
564
565 p->bridge_dev = NULL;
566
567 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
568 * so allow it to be in BR_STATE_FORWARDING to be kept functional
569 */
570 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
571
572 return ret;
573}
574
f8e20a9f
SF		 575static int dsa_slave_port_attr_get(struct net_device *dev,
576 struct switchdev_attr *attr)
b73adef6
FF		 577{
578 struct dsa_slave_priv *p = netdev_priv(dev);
579 struct dsa_switch *ds = p->parent;
580
f8e20a9f
SF		 581 switch (attr->id) {
582 case SWITCHDEV_ATTR_PORT_PARENT_ID:
42275bd8
SF		 583 attr->u.ppid.id_len = sizeof(ds->index);
584 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
f8e20a9f
SF		 585 break;
586 default:
587 return -EOPNOTSUPP;
588 }
b73adef6
FF		 589
590 return 0;
591}
592
04ff53f9
FF		 593static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
594 struct sk_buff *skb)
595{
596#ifdef CONFIG_NET_POLL_CONTROLLER
597 if (p->netpoll)
598 netpoll_send_skb(p->netpoll, skb);
599#else
600 BUG();
601#endif
602 return NETDEV_TX_OK;
603}
604
3e8a72d1
FF		 605static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
606{
607 struct dsa_slave_priv *p = netdev_priv(dev);
4ed70ce9 608 struct sk_buff *nskb;
3e8a72d1 609
4ed70ce9
FF		 610 dev->stats.tx_packets++;
611 dev->stats.tx_bytes += skb->len;
3e8a72d1 612
4ed70ce9
FF		 613 /* Transmit function may have to reallocate the original SKB */
614 nskb = p->xmit(skb, dev);
615 if (!nskb)
616 return NETDEV_TX_OK;
5aed85ce 617
04ff53f9
FF		 618 /* SKB for netpoll still need to be mangled with the protocol-specific
619 * tag to be successfully transmitted
620 */
621 if (unlikely(netpoll_tx_running(dev)))
622 return dsa_netpoll_send_skb(p, nskb);
623
4ed70ce9
FF		 624 /* Queue the SKB for transmission on the parent interface, but
625 * do not modify its EtherType
626 */
627 nskb->dev = p->parent->dst->master_netdev;
628 dev_queue_xmit(nskb);
5aed85ce
FF		 629
630 return NETDEV_TX_OK;
631}
632
4ed70ce9
FF		 633static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
634 struct net_device *dev)
635{
636 /* Just return the original SKB */
637 return skb;
638}
639
91da11f8
LB		 640
641/* ethtool operations *******************************************************/
642static int
643dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
644{
645 struct dsa_slave_priv *p = netdev_priv(dev);
646 int err;
647
648 err = -EOPNOTSUPP;
649 if (p->phy != NULL) {
650 err = phy_read_status(p->phy);
651 if (err == 0)
652 err = phy_ethtool_gset(p->phy, cmd);
653 }
654
655 return err;
656}
657
658static int
659dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
660{
661 struct dsa_slave_priv *p = netdev_priv(dev);
662
663 if (p->phy != NULL)
664 return phy_ethtool_sset(p->phy, cmd);
665
666 return -EOPNOTSUPP;
667}
668
669static void dsa_slave_get_drvinfo(struct net_device *dev,
670 struct ethtool_drvinfo *drvinfo)
671{
7826d43f
JP		 672 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
673 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
674 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
675 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
91da11f8
LB		 676}
677
3d762a0f
GR		 678static int dsa_slave_get_regs_len(struct net_device *dev)
679{
680 struct dsa_slave_priv *p = netdev_priv(dev);
681 struct dsa_switch *ds = p->parent;
682
683 if (ds->drv->get_regs_len)
684 return ds->drv->get_regs_len(ds, p->port);
685
686 return -EOPNOTSUPP;
687}
688
689static void
690dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
691{
692 struct dsa_slave_priv *p = netdev_priv(dev);
693 struct dsa_switch *ds = p->parent;
694
695 if (ds->drv->get_regs)
696 ds->drv->get_regs(ds, p->port, regs, _p);
697}
698
91da11f8
LB		 699static int dsa_slave_nway_reset(struct net_device *dev)
700{
701 struct dsa_slave_priv *p = netdev_priv(dev);
702
703 if (p->phy != NULL)
704 return genphy_restart_aneg(p->phy);
705
706 return -EOPNOTSUPP;
707}
708
709static u32 dsa_slave_get_link(struct net_device *dev)
710{
711 struct dsa_slave_priv *p = netdev_priv(dev);
712
713 if (p->phy != NULL) {
714 genphy_update_link(p->phy);
715 return p->phy->link;
716 }
717
718 return -EOPNOTSUPP;
719}
720
6793abb4
GR		 721static int dsa_slave_get_eeprom_len(struct net_device *dev)
722{
723 struct dsa_slave_priv *p = netdev_priv(dev);
724 struct dsa_switch *ds = p->parent;
725
726 if (ds->pd->eeprom_len)
727 return ds->pd->eeprom_len;
728
729 if (ds->drv->get_eeprom_len)
730 return ds->drv->get_eeprom_len(ds);
731
732 return 0;
733}
734
735static int dsa_slave_get_eeprom(struct net_device *dev,
736 struct ethtool_eeprom *eeprom, u8 *data)
737{
738 struct dsa_slave_priv *p = netdev_priv(dev);
739 struct dsa_switch *ds = p->parent;
740
741 if (ds->drv->get_eeprom)
742 return ds->drv->get_eeprom(ds, eeprom, data);
743
744 return -EOPNOTSUPP;
745}
746
747static int dsa_slave_set_eeprom(struct net_device *dev,
748 struct ethtool_eeprom *eeprom, u8 *data)
749{
750 struct dsa_slave_priv *p = netdev_priv(dev);
751 struct dsa_switch *ds = p->parent;
752
753 if (ds->drv->set_eeprom)
754 return ds->drv->set_eeprom(ds, eeprom, data);
755
756 return -EOPNOTSUPP;
757}
758
91da11f8
LB		 759static void dsa_slave_get_strings(struct net_device *dev,
760 uint32_t stringset, uint8_t *data)
761{
762 struct dsa_slave_priv *p = netdev_priv(dev);
763 struct dsa_switch *ds = p->parent;
764
765 if (stringset == ETH_SS_STATS) {
766 int len = ETH_GSTRING_LEN;
767
768 strncpy(data, "tx_packets", len);
769 strncpy(data + len, "tx_bytes", len);
770 strncpy(data + 2 * len, "rx_packets", len);
771 strncpy(data + 3 * len, "rx_bytes", len);
772 if (ds->drv->get_strings != NULL)
773 ds->drv->get_strings(ds, p->port, data + 4 * len);
774 }
775}
776
777static void dsa_slave_get_ethtool_stats(struct net_device *dev,
778 struct ethtool_stats *stats,
779 uint64_t *data)
780{
781 struct dsa_slave_priv *p = netdev_priv(dev);
782 struct dsa_switch *ds = p->parent;
783
784 data[0] = p->dev->stats.tx_packets;
785 data[1] = p->dev->stats.tx_bytes;
786 data[2] = p->dev->stats.rx_packets;
787 data[3] = p->dev->stats.rx_bytes;
788 if (ds->drv->get_ethtool_stats != NULL)
789 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
790}
791
792static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
793{
794 struct dsa_slave_priv *p = netdev_priv(dev);
795 struct dsa_switch *ds = p->parent;
796
797 if (sset == ETH_SS_STATS) {
798 int count;
799
800 count = 4;
801 if (ds->drv->get_sset_count != NULL)
802 count += ds->drv->get_sset_count(ds);
803
804 return count;
805 }
806
807 return -EOPNOTSUPP;
808}
809
19e57c4e
FF		 810static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
811{
812 struct dsa_slave_priv *p = netdev_priv(dev);
813 struct dsa_switch *ds = p->parent;
814
815 if (ds->drv->get_wol)
816 ds->drv->get_wol(ds, p->port, w);
817}
818
819static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
820{
821 struct dsa_slave_priv *p = netdev_priv(dev);
822 struct dsa_switch *ds = p->parent;
823 int ret = -EOPNOTSUPP;
824
825 if (ds->drv->set_wol)
826 ret = ds->drv->set_wol(ds, p->port, w);
827
828 return ret;
829}
830
7905288f
FF		 831static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
832{
833 struct dsa_slave_priv *p = netdev_priv(dev);
834 struct dsa_switch *ds = p->parent;
835 int ret;
836
837 if (!ds->drv->set_eee)
838 return -EOPNOTSUPP;
839
840 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
841 if (ret)
842 return ret;
843
844 if (p->phy)
845 ret = phy_ethtool_set_eee(p->phy, e);
846
847 return ret;
848}
849
850static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
851{
852 struct dsa_slave_priv *p = netdev_priv(dev);
853 struct dsa_switch *ds = p->parent;
854 int ret;
855
856 if (!ds->drv->get_eee)
857 return -EOPNOTSUPP;
858
859 ret = ds->drv->get_eee(ds, p->port, e);
860 if (ret)
861 return ret;
862
863 if (p->phy)
864 ret = phy_ethtool_get_eee(p->phy, e);
865
866 return ret;
867}
868
04ff53f9
FF		 869#ifdef CONFIG_NET_POLL_CONTROLLER
870static int dsa_slave_netpoll_setup(struct net_device *dev,
871 struct netpoll_info *ni)
872{
873 struct dsa_slave_priv *p = netdev_priv(dev);
874 struct dsa_switch *ds = p->parent;
875 struct net_device *master = ds->dst->master_netdev;
876 struct netpoll *netpoll;
877 int err = 0;
878
879 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
880 if (!netpoll)
881 return -ENOMEM;
882
883 err = __netpoll_setup(netpoll, master);
884 if (err) {
885 kfree(netpoll);
886 goto out;
887 }
888
889 p->netpoll = netpoll;
890out:
891 return err;
892}
893
894static void dsa_slave_netpoll_cleanup(struct net_device *dev)
895{
896 struct dsa_slave_priv *p = netdev_priv(dev);
897 struct netpoll *netpoll = p->netpoll;
898
899 if (!netpoll)
900 return;
901
902 p->netpoll = NULL;
903
904 __netpoll_free_async(netpoll);
905}
906
907static void dsa_slave_poll_controller(struct net_device *dev)
908{
909}
910#endif
911
91da11f8
LB		 912static const struct ethtool_ops dsa_slave_ethtool_ops = {
913 .get_settings = dsa_slave_get_settings,
914 .set_settings = dsa_slave_set_settings,
915 .get_drvinfo = dsa_slave_get_drvinfo,
3d762a0f
GR		 916 .get_regs_len = dsa_slave_get_regs_len,
917 .get_regs = dsa_slave_get_regs,
91da11f8
LB		 918 .nway_reset = dsa_slave_nway_reset,
919 .get_link = dsa_slave_get_link,
6793abb4
GR		 920 .get_eeprom_len = dsa_slave_get_eeprom_len,
921 .get_eeprom = dsa_slave_get_eeprom,
922 .set_eeprom = dsa_slave_set_eeprom,
91da11f8
LB		 923 .get_strings = dsa_slave_get_strings,
924 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
925 .get_sset_count = dsa_slave_get_sset_count,
19e57c4e
FF		 926 .set_wol = dsa_slave_set_wol,
927 .get_wol = dsa_slave_get_wol,
7905288f
FF		 928 .set_eee = dsa_slave_set_eee,
929 .get_eee = dsa_slave_get_eee,
91da11f8
LB		 930};
931
3e8a72d1 932static const struct net_device_ops dsa_slave_netdev_ops = {
d442ad4a
SH		 933 .ndo_open = dsa_slave_open,
934 .ndo_stop = dsa_slave_close,
3e8a72d1 935 .ndo_start_xmit = dsa_slave_xmit,
d442ad4a
SH		 936 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
937 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
d442ad4a 938 .ndo_set_mac_address = dsa_slave_set_mac_address,
ba14d9eb
VD		 939 .ndo_fdb_add = switchdev_port_fdb_add,
940 .ndo_fdb_del = switchdev_port_fdb_del,
941 .ndo_fdb_dump = switchdev_port_fdb_dump,
d442ad4a 942 .ndo_do_ioctl = dsa_slave_ioctl,
abd2be00 943 .ndo_get_iflink = dsa_slave_get_iflink,
04ff53f9
FF		 944#ifdef CONFIG_NET_POLL_CONTROLLER
945 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
946 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
947 .ndo_poll_controller = dsa_slave_poll_controller,
948#endif
11149536
VD		 949 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
950 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
951 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
98237d43
SF		 952};
953
9d47c0a2 954static const struct switchdev_ops dsa_slave_switchdev_ops = {
f8e20a9f 955 .switchdev_port_attr_get = dsa_slave_port_attr_get,
35636062 956 .switchdev_port_attr_set = dsa_slave_port_attr_set,
ba14d9eb
VD		 957 .switchdev_port_obj_add = dsa_slave_port_obj_add,
958 .switchdev_port_obj_del = dsa_slave_port_obj_del,
959 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
d442ad4a 960};
91da11f8 961
f37db85d
FF		 962static struct device_type dsa_type = {
963 .name = "dsa",
964};
965
0d8bcdd3
FF		 966static void dsa_slave_adjust_link(struct net_device *dev)
967{
968 struct dsa_slave_priv *p = netdev_priv(dev);
ec9436ba 969 struct dsa_switch *ds = p->parent;
0d8bcdd3
FF		 970 unsigned int status_changed = 0;
971
972 if (p->old_link != p->phy->link) {
973 status_changed = 1;
974 p->old_link = p->phy->link;
975 }
976
977 if (p->old_duplex != p->phy->duplex) {
978 status_changed = 1;
979 p->old_duplex = p->phy->duplex;
980 }
981
982 if (p->old_pause != p->phy->pause) {
983 status_changed = 1;
984 p->old_pause = p->phy->pause;
985 }
986
ec9436ba
FF		 987 if (ds->drv->adjust_link && status_changed)
988 ds->drv->adjust_link(ds, p->port, p->phy);
989
0d8bcdd3
FF		 990 if (status_changed)
991 phy_print_status(p->phy);
992}
993
ce31b31c
FF		 994static int dsa_slave_fixed_link_update(struct net_device *dev,
995 struct fixed_phy_status *status)
996{
997 struct dsa_slave_priv *p = netdev_priv(dev);
998 struct dsa_switch *ds = p->parent;
999
1000 if (ds->drv->fixed_link_update)
1001 ds->drv->fixed_link_update(ds, p->port, status);
1002
1003 return 0;
1004}
1005
91da11f8 1006/* slave device setup *******************************************************/
c305c165 1007static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
cd28a1a9
FF		 1008 struct net_device *slave_dev,
1009 int addr)
c305c165
FF		 1010{
1011 struct dsa_switch *ds = p->parent;
1012
cd28a1a9 1013 p->phy = ds->slave_mii_bus->phy_map[addr];
c305c165
FF		 1014 if (!p->phy)
1015 return -ENODEV;
1016
1017 /* Use already configured phy mode */
211c504a
FF		 1018 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1019 p->phy_interface = p->phy->interface;
c305c165
FF		 1020 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
1021 p->phy_interface);
1022
1023 return 0;
1024}
1025
9697f1cd 1026static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
0d8bcdd3
FF		 1027 struct net_device *slave_dev)
1028{
1029 struct dsa_switch *ds = p->parent;
1030 struct dsa_chip_data *cd = ds->pd;
1031 struct device_node *phy_dn, *port_dn;
ce31b31c 1032 bool phy_is_fixed = false;
6819563e 1033 u32 phy_flags = 0;
19334920 1034 int mode, ret;
0d8bcdd3
FF		 1035
1036 port_dn = cd->port_dn[p->port];
19334920
GR		 1037 mode = of_get_phy_mode(port_dn);
1038 if (mode < 0)
1039 mode = PHY_INTERFACE_MODE_NA;
1040 p->phy_interface = mode;
0d8bcdd3
FF		 1041
1042 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1043 if (of_phy_is_fixed_link(port_dn)) {
1044 /* In the case of a fixed PHY, the DT node associated
1045 * to the fixed PHY is the Port DT node
1046 */
1047 ret = of_phy_register_fixed_link(port_dn);
1048 if (ret) {
a2ae6007 1049 netdev_err(slave_dev, "failed to register fixed PHY\n");
9697f1cd 1050 return ret;
0d8bcdd3 1051 }
ce31b31c 1052 phy_is_fixed = true;
0d8bcdd3
FF		 1053 phy_dn = port_dn;
1054 }
1055
6819563e
FF		 1056 if (ds->drv->get_phy_flags)
1057 phy_flags = ds->drv->get_phy_flags(ds, p->port);
1058
cd28a1a9
FF		 1059 if (phy_dn) {
1060 ret = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
1061 /* If this PHY address is part of phys_mii_mask, which means
1062 * that we need to divert reads and writes to/from it, then we
1063 * want to bind this device using the slave MII bus created by
1064 * DSA to make that happen.
1065 */
96026d05
FF		 1066 if (!phy_is_fixed && ret >= 0 &&
1067 (ds->phys_mii_mask & (1 << ret))) {
cd28a1a9
FF		 1068 ret = dsa_slave_phy_connect(p, slave_dev, ret);
1069 if (ret)
1070 return ret;
1071 } else {
1072 p->phy = of_phy_connect(slave_dev, phy_dn,
1073 dsa_slave_adjust_link,
1074 phy_flags,
1075 p->phy_interface);
1076 }
1077 }
0d8bcdd3 1078
ce31b31c
FF		 1079 if (p->phy && phy_is_fixed)
1080 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
1081
0d8bcdd3
FF		 1082 /* We could not connect to a designated PHY, so use the switch internal
1083 * MDIO bus instead
1084 */
b31f65fb 1085 if (!p->phy) {
cd28a1a9 1086 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
c305c165
FF		 1087 if (ret)
1088 return ret;
b31f65fb 1089 } else {
a2ae6007
JP		 1090 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
1091 p->phy->addr, p->phy->drv->name);
b31f65fb 1092 }
9697f1cd
FF		 1093
1094 return 0;
0d8bcdd3
FF		 1095}
1096
448b4482
AL		 1097static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1098static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1099 struct netdev_queue *txq,
1100 void *_unused)
1101{
1102 lockdep_set_class(&txq->_xmit_lock,
1103 &dsa_slave_netdev_xmit_lock_key);
1104}
1105
24462549
FF		 1106int dsa_slave_suspend(struct net_device *slave_dev)
1107{
1108 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1109
24462549
FF		 1110 if (p->phy) {
1111 phy_stop(p->phy);
1112 p->old_pause = -1;
1113 p->old_link = -1;
1114 p->old_duplex = -1;
1115 phy_suspend(p->phy);
1116 }
1117
1118 return 0;
1119}
1120
1121int dsa_slave_resume(struct net_device *slave_dev)
1122{
1123 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1124
1125 netif_device_attach(slave_dev);
1126
1127 if (p->phy) {
1128 phy_resume(p->phy);
1129 phy_start(p->phy);
1130 }
1131
1132 return 0;
1133}
1134
d87d6f44
GR		 1135int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1136 int port, char *name)
91da11f8 1137{
e84665c9 1138 struct net_device *master = ds->dst->master_netdev;
91da11f8
LB		 1139 struct net_device *slave_dev;
1140 struct dsa_slave_priv *p;
1141 int ret;
1142
c835a677
TG		 1143 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1144 NET_NAME_UNKNOWN, ether_setup);
91da11f8 1145 if (slave_dev == NULL)
d87d6f44 1146 return -ENOMEM;
91da11f8
LB		 1147
1148 slave_dev->features = master->vlan_features;
7ad24ea4 1149 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
2fcc8005 1150 eth_hw_addr_inherit(slave_dev, master);
0a5f107b 1151 slave_dev->priv_flags |= IFF_NO_QUEUE;
3e8a72d1 1152 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
9d47c0a2 1153 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
f37db85d 1154 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
d442ad4a 1155
448b4482
AL		 1156 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1157 NULL);
1158
5075314e
AD		 1159 SET_NETDEV_DEV(slave_dev, parent);
1160 slave_dev->dev.of_node = ds->pd->port_dn[port];
1161 slave_dev->vlan_features = master->vlan_features;
1162
1163 p = netdev_priv(slave_dev);
1164 p->dev = slave_dev;
1165 p->parent = ds;
1166 p->port = port;
1167
e84665c9 1168 switch (ds->dst->tag_protocol) {
cf85d08f 1169#ifdef CONFIG_NET_DSA_TAG_DSA
ac7a04c3 1170 case DSA_TAG_PROTO_DSA:
5075314e 1171 p->xmit = dsa_netdev_ops.xmit;
cf85d08f
LB		 1172 break;
1173#endif
91da11f8 1174#ifdef CONFIG_NET_DSA_TAG_EDSA
ac7a04c3 1175 case DSA_TAG_PROTO_EDSA:
5075314e 1176 p->xmit = edsa_netdev_ops.xmit;
91da11f8 1177 break;
396138f0
LB		 1178#endif
1179#ifdef CONFIG_NET_DSA_TAG_TRAILER
ac7a04c3 1180 case DSA_TAG_PROTO_TRAILER:
5075314e 1181 p->xmit = trailer_netdev_ops.xmit;
396138f0 1182 break;
5037d532
FF		 1183#endif
1184#ifdef CONFIG_NET_DSA_TAG_BRCM
ac7a04c3 1185 case DSA_TAG_PROTO_BRCM:
5075314e 1186 p->xmit = brcm_netdev_ops.xmit;
5037d532 1187 break;
91da11f8
LB		 1188#endif
1189 default:
5075314e 1190 p->xmit = dsa_slave_notag_xmit;
5aed85ce 1191 break;
91da11f8 1192 }
d442ad4a 1193
0d8bcdd3
FF		 1194 p->old_pause = -1;
1195 p->old_link = -1;
1196 p->old_duplex = -1;
1197
9697f1cd
FF		 1198 ret = dsa_slave_phy_setup(p, slave_dev);
1199 if (ret) {
1200 free_netdev(slave_dev);
d87d6f44 1201 return ret;
9697f1cd 1202 }
91da11f8 1203
d87d6f44 1204 ds->ports[port] = slave_dev;
91da11f8
LB		 1205 ret = register_netdev(slave_dev);
1206 if (ret) {
a2ae6007
JP		 1207 netdev_err(master, "error %d registering interface %s\n",
1208 ret, slave_dev->name);
9697f1cd 1209 phy_disconnect(p->phy);
d87d6f44 1210 ds->ports[port] = NULL;
91da11f8 1211 free_netdev(slave_dev);
d87d6f44 1212 return ret;
91da11f8
LB		 1213 }
1214
1215 netif_carrier_off(slave_dev);
1216
d87d6f44 1217 return 0;
91da11f8 1218}
b73adef6
FF		 1219
1220static bool dsa_slave_dev_check(struct net_device *dev)
1221{
1222 return dev->netdev_ops == &dsa_slave_netdev_ops;
1223}
1224
1225static int dsa_slave_master_changed(struct net_device *dev)
1226{
1227 struct net_device *master = netdev_master_upper_dev_get(dev);
b06b107a 1228 struct dsa_slave_priv *p = netdev_priv(dev);
b73adef6
FF		 1229 int err = 0;
1230
1231 if (master && master->rtnl_link_ops &&
1232 !strcmp(master->rtnl_link_ops->kind, "bridge"))
1233 err = dsa_slave_bridge_port_join(dev, master);
b06b107a 1234 else if (dsa_port_is_bridged(p))
b73adef6
FF		 1235 err = dsa_slave_bridge_port_leave(dev);
1236
1237 return err;
1238}
1239
1240int dsa_slave_netdevice_event(struct notifier_block *unused,
1241 unsigned long event, void *ptr)
1242{
1243 struct net_device *dev;
1244 int err = 0;
1245
1246 switch (event) {
1247 case NETDEV_CHANGEUPPER:
1248 dev = netdev_notifier_info_to_dev(ptr);
1249 if (!dsa_slave_dev_check(dev))
1250 goto out;
1251
1252 err = dsa_slave_master_changed(dev);
1253 if (err)
1254 netdev_warn(dev, "failed to reflect master change\n");
1255
1256 break;
1257 }
1258
1259out:
1260 return NOTIFY_DONE;
1261}
Linux kernel - Deliverables
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