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net: dsa: mv88e6xxx: remove link polling
[mirror_ubuntu-focal-kernel.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,
8f24f309 245 const struct switchdev_obj_port_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,
8f24f309 281 const struct switchdev_obj_port_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,
8f24f309 301 struct switchdev_obj_port_vlan *vlan,
648b4a99 302 switchdev_obj_dump_cb_t *cb)
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
648b4a99 335 err = cb(&vlan->obj);
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,
52ba57cf 344 const struct switchdev_obj_port_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,
52ba57cf 360 const struct switchdev_obj_port_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,
52ba57cf 373 struct switchdev_obj_port_fdb *fdb,
648b4a99 374 switchdev_obj_dump_cb_t *cb)
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
648b4a99 397 ret = cb(&fdb->obj);
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 455{
b8d866ac
VD		 456 struct dsa_slave_priv *p = netdev_priv(dev);
457 struct dsa_switch *ds = p->parent;
458 int ret;
35636062
SF		 459
460 switch (attr->id) {
1f868398 461 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
b8d866ac
VD		 462 if (switchdev_trans_ph_prepare(trans))
463 ret = ds->drv->port_stp_update ? 0 : -EOPNOTSUPP;
464 else
465 ret = ds->drv->port_stp_update(ds, p->port,
466 attr->u.stp_state);
35636062
SF		 467 break;
468 default:
469 ret = -EOPNOTSUPP;
470 break;
471 }
472
473 return ret;
474}
475
ba14d9eb 476static int dsa_slave_port_obj_add(struct net_device *dev,
648b4a99 477 const struct switchdev_obj *obj,
7ea6eb3f 478 struct switchdev_trans *trans)
ba14d9eb
VD		 479{
480 int err;
481
482 /* For the prepare phase, ensure the full set of changes is feasable in
483 * one go in order to signal a failure properly. If an operation is not
484 * supported, return -EOPNOTSUPP.
485 */
486
9e8f4a54 487 switch (obj->id) {
57d80838 488 case SWITCHDEV_OBJ_ID_PORT_FDB:
648b4a99
JP		 489 err = dsa_slave_port_fdb_add(dev,
490 SWITCHDEV_OBJ_PORT_FDB(obj),
491 trans);
ba14d9eb 492 break;
57d80838 493 case SWITCHDEV_OBJ_ID_PORT_VLAN:
648b4a99
JP		 494 err = dsa_slave_port_vlan_add(dev,
495 SWITCHDEV_OBJ_PORT_VLAN(obj),
496 trans);
11149536 497 break;
ba14d9eb
VD		 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,
648b4a99 507 const struct switchdev_obj *obj)
ba14d9eb
VD		 508{
509 int err;
510
9e8f4a54 511 switch (obj->id) {
57d80838 512 case SWITCHDEV_OBJ_ID_PORT_FDB:
648b4a99
JP		 513 err = dsa_slave_port_fdb_del(dev,
514 SWITCHDEV_OBJ_PORT_FDB(obj));
ba14d9eb 515 break;
57d80838 516 case SWITCHDEV_OBJ_ID_PORT_VLAN:
648b4a99
JP		 517 err = dsa_slave_port_vlan_del(dev,
518 SWITCHDEV_OBJ_PORT_VLAN(obj));
11149536 519 break;
ba14d9eb
VD		 520 default:
521 err = -EOPNOTSUPP;
522 break;
523 }
524
525 return err;
526}
527
528static int dsa_slave_port_obj_dump(struct net_device *dev,
648b4a99
JP		 529 struct switchdev_obj *obj,
530 switchdev_obj_dump_cb_t *cb)
ba14d9eb
VD		 531{
532 int err;
533
9e8f4a54 534 switch (obj->id) {
57d80838 535 case SWITCHDEV_OBJ_ID_PORT_FDB:
648b4a99
JP		 536 err = dsa_slave_port_fdb_dump(dev,
537 SWITCHDEV_OBJ_PORT_FDB(obj),
538 cb);
ba14d9eb 539 break;
57d80838 540 case SWITCHDEV_OBJ_ID_PORT_VLAN:
648b4a99
JP		 541 err = dsa_slave_port_vlan_dump(dev,
542 SWITCHDEV_OBJ_PORT_VLAN(obj),
543 cb);
11149536 544 break;
ba14d9eb
VD		 545 default:
546 err = -EOPNOTSUPP;
547 break;
548 }
549
550 return err;
551}
552
b73adef6
FF		 553static int dsa_slave_bridge_port_join(struct net_device *dev,
554 struct net_device *br)
555{
556 struct dsa_slave_priv *p = netdev_priv(dev);
557 struct dsa_switch *ds = p->parent;
558 int ret = -EOPNOTSUPP;
559
560 p->bridge_dev = br;
561
562 if (ds->drv->port_join_bridge)
563 ret = ds->drv->port_join_bridge(ds, p->port,
564 dsa_slave_br_port_mask(ds, br));
565
566 return ret;
567}
568
569static int dsa_slave_bridge_port_leave(struct net_device *dev)
570{
571 struct dsa_slave_priv *p = netdev_priv(dev);
572 struct dsa_switch *ds = p->parent;
573 int ret = -EOPNOTSUPP;
574
575
576 if (ds->drv->port_leave_bridge)
577 ret = ds->drv->port_leave_bridge(ds, p->port,
578 dsa_slave_br_port_mask(ds, p->bridge_dev));
579
580 p->bridge_dev = NULL;
581
582 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
583 * so allow it to be in BR_STATE_FORWARDING to be kept functional
584 */
585 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
586
587 return ret;
588}
589
f8e20a9f
SF		 590static int dsa_slave_port_attr_get(struct net_device *dev,
591 struct switchdev_attr *attr)
b73adef6
FF		 592{
593 struct dsa_slave_priv *p = netdev_priv(dev);
594 struct dsa_switch *ds = p->parent;
595
f8e20a9f 596 switch (attr->id) {
1f868398 597 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
42275bd8
SF		 598 attr->u.ppid.id_len = sizeof(ds->index);
599 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
f8e20a9f
SF		 600 break;
601 default:
602 return -EOPNOTSUPP;
603 }
b73adef6
FF		 604
605 return 0;
606}
607
04ff53f9
FF		 608static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
609 struct sk_buff *skb)
610{
611#ifdef CONFIG_NET_POLL_CONTROLLER
612 if (p->netpoll)
613 netpoll_send_skb(p->netpoll, skb);
614#else
615 BUG();
616#endif
617 return NETDEV_TX_OK;
618}
619
3e8a72d1
FF		 620static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
621{
622 struct dsa_slave_priv *p = netdev_priv(dev);
4ed70ce9 623 struct sk_buff *nskb;
3e8a72d1 624
4ed70ce9
FF		 625 dev->stats.tx_packets++;
626 dev->stats.tx_bytes += skb->len;
3e8a72d1 627
4ed70ce9
FF		 628 /* Transmit function may have to reallocate the original SKB */
629 nskb = p->xmit(skb, dev);
630 if (!nskb)
631 return NETDEV_TX_OK;
5aed85ce 632
04ff53f9
FF		 633 /* SKB for netpoll still need to be mangled with the protocol-specific
634 * tag to be successfully transmitted
635 */
636 if (unlikely(netpoll_tx_running(dev)))
637 return dsa_netpoll_send_skb(p, nskb);
638
4ed70ce9
FF		 639 /* Queue the SKB for transmission on the parent interface, but
640 * do not modify its EtherType
641 */
642 nskb->dev = p->parent->dst->master_netdev;
643 dev_queue_xmit(nskb);
5aed85ce
FF		 644
645 return NETDEV_TX_OK;
646}
647
4ed70ce9
FF		 648static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
649 struct net_device *dev)
650{
651 /* Just return the original SKB */
652 return skb;
653}
654
91da11f8
LB		 655
656/* ethtool operations *******************************************************/
657static int
658dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
659{
660 struct dsa_slave_priv *p = netdev_priv(dev);
661 int err;
662
663 err = -EOPNOTSUPP;
664 if (p->phy != NULL) {
665 err = phy_read_status(p->phy);
666 if (err == 0)
667 err = phy_ethtool_gset(p->phy, cmd);
668 }
669
670 return err;
671}
672
673static int
674dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
675{
676 struct dsa_slave_priv *p = netdev_priv(dev);
677
678 if (p->phy != NULL)
679 return phy_ethtool_sset(p->phy, cmd);
680
681 return -EOPNOTSUPP;
682}
683
684static void dsa_slave_get_drvinfo(struct net_device *dev,
685 struct ethtool_drvinfo *drvinfo)
686{
7826d43f
JP		 687 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
688 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
689 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
690 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
91da11f8
LB		 691}
692
3d762a0f
GR		 693static int dsa_slave_get_regs_len(struct net_device *dev)
694{
695 struct dsa_slave_priv *p = netdev_priv(dev);
696 struct dsa_switch *ds = p->parent;
697
698 if (ds->drv->get_regs_len)
699 return ds->drv->get_regs_len(ds, p->port);
700
701 return -EOPNOTSUPP;
702}
703
704static void
705dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
706{
707 struct dsa_slave_priv *p = netdev_priv(dev);
708 struct dsa_switch *ds = p->parent;
709
710 if (ds->drv->get_regs)
711 ds->drv->get_regs(ds, p->port, regs, _p);
712}
713
91da11f8
LB		 714static int dsa_slave_nway_reset(struct net_device *dev)
715{
716 struct dsa_slave_priv *p = netdev_priv(dev);
717
718 if (p->phy != NULL)
719 return genphy_restart_aneg(p->phy);
720
721 return -EOPNOTSUPP;
722}
723
724static u32 dsa_slave_get_link(struct net_device *dev)
725{
726 struct dsa_slave_priv *p = netdev_priv(dev);
727
728 if (p->phy != NULL) {
729 genphy_update_link(p->phy);
730 return p->phy->link;
731 }
732
733 return -EOPNOTSUPP;
734}
735
6793abb4
GR		 736static int dsa_slave_get_eeprom_len(struct net_device *dev)
737{
738 struct dsa_slave_priv *p = netdev_priv(dev);
739 struct dsa_switch *ds = p->parent;
740
741 if (ds->pd->eeprom_len)
742 return ds->pd->eeprom_len;
743
744 if (ds->drv->get_eeprom_len)
745 return ds->drv->get_eeprom_len(ds);
746
747 return 0;
748}
749
750static int dsa_slave_get_eeprom(struct net_device *dev,
751 struct ethtool_eeprom *eeprom, u8 *data)
752{
753 struct dsa_slave_priv *p = netdev_priv(dev);
754 struct dsa_switch *ds = p->parent;
755
756 if (ds->drv->get_eeprom)
757 return ds->drv->get_eeprom(ds, eeprom, data);
758
759 return -EOPNOTSUPP;
760}
761
762static int dsa_slave_set_eeprom(struct net_device *dev,
763 struct ethtool_eeprom *eeprom, u8 *data)
764{
765 struct dsa_slave_priv *p = netdev_priv(dev);
766 struct dsa_switch *ds = p->parent;
767
768 if (ds->drv->set_eeprom)
769 return ds->drv->set_eeprom(ds, eeprom, data);
770
771 return -EOPNOTSUPP;
772}
773
91da11f8
LB		 774static void dsa_slave_get_strings(struct net_device *dev,
775 uint32_t stringset, uint8_t *data)
776{
777 struct dsa_slave_priv *p = netdev_priv(dev);
778 struct dsa_switch *ds = p->parent;
779
780 if (stringset == ETH_SS_STATS) {
781 int len = ETH_GSTRING_LEN;
782
783 strncpy(data, "tx_packets", len);
784 strncpy(data + len, "tx_bytes", len);
785 strncpy(data + 2 * len, "rx_packets", len);
786 strncpy(data + 3 * len, "rx_bytes", len);
787 if (ds->drv->get_strings != NULL)
788 ds->drv->get_strings(ds, p->port, data + 4 * len);
789 }
790}
791
792static void dsa_slave_get_ethtool_stats(struct net_device *dev,
793 struct ethtool_stats *stats,
794 uint64_t *data)
795{
796 struct dsa_slave_priv *p = netdev_priv(dev);
797 struct dsa_switch *ds = p->parent;
798
799 data[0] = p->dev->stats.tx_packets;
800 data[1] = p->dev->stats.tx_bytes;
801 data[2] = p->dev->stats.rx_packets;
802 data[3] = p->dev->stats.rx_bytes;
803 if (ds->drv->get_ethtool_stats != NULL)
804 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
805}
806
807static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
808{
809 struct dsa_slave_priv *p = netdev_priv(dev);
810 struct dsa_switch *ds = p->parent;
811
812 if (sset == ETH_SS_STATS) {
813 int count;
814
815 count = 4;
816 if (ds->drv->get_sset_count != NULL)
817 count += ds->drv->get_sset_count(ds);
818
819 return count;
820 }
821
822 return -EOPNOTSUPP;
823}
824
19e57c4e
FF		 825static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
826{
827 struct dsa_slave_priv *p = netdev_priv(dev);
828 struct dsa_switch *ds = p->parent;
829
830 if (ds->drv->get_wol)
831 ds->drv->get_wol(ds, p->port, w);
832}
833
834static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
835{
836 struct dsa_slave_priv *p = netdev_priv(dev);
837 struct dsa_switch *ds = p->parent;
838 int ret = -EOPNOTSUPP;
839
840 if (ds->drv->set_wol)
841 ret = ds->drv->set_wol(ds, p->port, w);
842
843 return ret;
844}
845
7905288f
FF		 846static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
847{
848 struct dsa_slave_priv *p = netdev_priv(dev);
849 struct dsa_switch *ds = p->parent;
850 int ret;
851
852 if (!ds->drv->set_eee)
853 return -EOPNOTSUPP;
854
855 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
856 if (ret)
857 return ret;
858
859 if (p->phy)
860 ret = phy_ethtool_set_eee(p->phy, e);
861
862 return ret;
863}
864
865static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
866{
867 struct dsa_slave_priv *p = netdev_priv(dev);
868 struct dsa_switch *ds = p->parent;
869 int ret;
870
871 if (!ds->drv->get_eee)
872 return -EOPNOTSUPP;
873
874 ret = ds->drv->get_eee(ds, p->port, e);
875 if (ret)
876 return ret;
877
878 if (p->phy)
879 ret = phy_ethtool_get_eee(p->phy, e);
880
881 return ret;
882}
883
04ff53f9
FF		 884#ifdef CONFIG_NET_POLL_CONTROLLER
885static int dsa_slave_netpoll_setup(struct net_device *dev,
886 struct netpoll_info *ni)
887{
888 struct dsa_slave_priv *p = netdev_priv(dev);
889 struct dsa_switch *ds = p->parent;
890 struct net_device *master = ds->dst->master_netdev;
891 struct netpoll *netpoll;
892 int err = 0;
893
894 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
895 if (!netpoll)
896 return -ENOMEM;
897
898 err = __netpoll_setup(netpoll, master);
899 if (err) {
900 kfree(netpoll);
901 goto out;
902 }
903
904 p->netpoll = netpoll;
905out:
906 return err;
907}
908
909static void dsa_slave_netpoll_cleanup(struct net_device *dev)
910{
911 struct dsa_slave_priv *p = netdev_priv(dev);
912 struct netpoll *netpoll = p->netpoll;
913
914 if (!netpoll)
915 return;
916
917 p->netpoll = NULL;
918
919 __netpoll_free_async(netpoll);
920}
921
922static void dsa_slave_poll_controller(struct net_device *dev)
923{
924}
925#endif
926
91da11f8
LB		 927static const struct ethtool_ops dsa_slave_ethtool_ops = {
928 .get_settings = dsa_slave_get_settings,
929 .set_settings = dsa_slave_set_settings,
930 .get_drvinfo = dsa_slave_get_drvinfo,
3d762a0f
GR		 931 .get_regs_len = dsa_slave_get_regs_len,
932 .get_regs = dsa_slave_get_regs,
91da11f8
LB		 933 .nway_reset = dsa_slave_nway_reset,
934 .get_link = dsa_slave_get_link,
6793abb4
GR		 935 .get_eeprom_len = dsa_slave_get_eeprom_len,
936 .get_eeprom = dsa_slave_get_eeprom,
937 .set_eeprom = dsa_slave_set_eeprom,
91da11f8
LB		 938 .get_strings = dsa_slave_get_strings,
939 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
940 .get_sset_count = dsa_slave_get_sset_count,
19e57c4e
FF		 941 .set_wol = dsa_slave_set_wol,
942 .get_wol = dsa_slave_get_wol,
7905288f
FF		 943 .set_eee = dsa_slave_set_eee,
944 .get_eee = dsa_slave_get_eee,
91da11f8
LB		 945};
946
3e8a72d1 947static const struct net_device_ops dsa_slave_netdev_ops = {
d442ad4a
SH		 948 .ndo_open = dsa_slave_open,
949 .ndo_stop = dsa_slave_close,
3e8a72d1 950 .ndo_start_xmit = dsa_slave_xmit,
d442ad4a
SH		 951 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
952 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
d442ad4a 953 .ndo_set_mac_address = dsa_slave_set_mac_address,
ba14d9eb
VD		 954 .ndo_fdb_add = switchdev_port_fdb_add,
955 .ndo_fdb_del = switchdev_port_fdb_del,
956 .ndo_fdb_dump = switchdev_port_fdb_dump,
d442ad4a 957 .ndo_do_ioctl = dsa_slave_ioctl,
abd2be00 958 .ndo_get_iflink = dsa_slave_get_iflink,
04ff53f9
FF		 959#ifdef CONFIG_NET_POLL_CONTROLLER
960 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
961 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
962 .ndo_poll_controller = dsa_slave_poll_controller,
963#endif
11149536
VD		 964 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
965 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
966 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
98237d43
SF		 967};
968
9d47c0a2 969static const struct switchdev_ops dsa_slave_switchdev_ops = {
f8e20a9f 970 .switchdev_port_attr_get = dsa_slave_port_attr_get,
35636062 971 .switchdev_port_attr_set = dsa_slave_port_attr_set,
ba14d9eb
VD		 972 .switchdev_port_obj_add = dsa_slave_port_obj_add,
973 .switchdev_port_obj_del = dsa_slave_port_obj_del,
974 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
d442ad4a 975};
91da11f8 976
f37db85d
FF		 977static struct device_type dsa_type = {
978 .name = "dsa",
979};
980
0d8bcdd3
FF		 981static void dsa_slave_adjust_link(struct net_device *dev)
982{
983 struct dsa_slave_priv *p = netdev_priv(dev);
ec9436ba 984 struct dsa_switch *ds = p->parent;
0d8bcdd3
FF		 985 unsigned int status_changed = 0;
986
987 if (p->old_link != p->phy->link) {
988 status_changed = 1;
989 p->old_link = p->phy->link;
990 }
991
992 if (p->old_duplex != p->phy->duplex) {
993 status_changed = 1;
994 p->old_duplex = p->phy->duplex;
995 }
996
997 if (p->old_pause != p->phy->pause) {
998 status_changed = 1;
999 p->old_pause = p->phy->pause;
1000 }
1001
ec9436ba
FF		 1002 if (ds->drv->adjust_link && status_changed)
1003 ds->drv->adjust_link(ds, p->port, p->phy);
1004
0d8bcdd3
FF		 1005 if (status_changed)
1006 phy_print_status(p->phy);
1007}
1008
ce31b31c
FF		 1009static int dsa_slave_fixed_link_update(struct net_device *dev,
1010 struct fixed_phy_status *status)
1011{
1012 struct dsa_slave_priv *p = netdev_priv(dev);
1013 struct dsa_switch *ds = p->parent;
1014
1015 if (ds->drv->fixed_link_update)
1016 ds->drv->fixed_link_update(ds, p->port, status);
1017
1018 return 0;
1019}
1020
91da11f8 1021/* slave device setup *******************************************************/
c305c165 1022static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
cd28a1a9
FF		 1023 struct net_device *slave_dev,
1024 int addr)
c305c165
FF		 1025{
1026 struct dsa_switch *ds = p->parent;
1027
cd28a1a9 1028 p->phy = ds->slave_mii_bus->phy_map[addr];
c305c165
FF		 1029 if (!p->phy)
1030 return -ENODEV;
1031
1032 /* Use already configured phy mode */
211c504a
FF		 1033 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1034 p->phy_interface = p->phy->interface;
c305c165
FF		 1035 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
1036 p->phy_interface);
1037
1038 return 0;
1039}
1040
9697f1cd 1041static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
0d8bcdd3
FF		 1042 struct net_device *slave_dev)
1043{
1044 struct dsa_switch *ds = p->parent;
1045 struct dsa_chip_data *cd = ds->pd;
1046 struct device_node *phy_dn, *port_dn;
ce31b31c 1047 bool phy_is_fixed = false;
6819563e 1048 u32 phy_flags = 0;
19334920 1049 int mode, ret;
0d8bcdd3
FF		 1050
1051 port_dn = cd->port_dn[p->port];
19334920
GR		 1052 mode = of_get_phy_mode(port_dn);
1053 if (mode < 0)
1054 mode = PHY_INTERFACE_MODE_NA;
1055 p->phy_interface = mode;
0d8bcdd3
FF		 1056
1057 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1058 if (of_phy_is_fixed_link(port_dn)) {
1059 /* In the case of a fixed PHY, the DT node associated
1060 * to the fixed PHY is the Port DT node
1061 */
1062 ret = of_phy_register_fixed_link(port_dn);
1063 if (ret) {
a2ae6007 1064 netdev_err(slave_dev, "failed to register fixed PHY\n");
9697f1cd 1065 return ret;
0d8bcdd3 1066 }
ce31b31c 1067 phy_is_fixed = true;
0d8bcdd3
FF		 1068 phy_dn = port_dn;
1069 }
1070
6819563e
FF		 1071 if (ds->drv->get_phy_flags)
1072 phy_flags = ds->drv->get_phy_flags(ds, p->port);
1073
cd28a1a9
FF		 1074 if (phy_dn) {
1075 ret = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
1076 /* If this PHY address is part of phys_mii_mask, which means
1077 * that we need to divert reads and writes to/from it, then we
1078 * want to bind this device using the slave MII bus created by
1079 * DSA to make that happen.
1080 */
96026d05
FF		 1081 if (!phy_is_fixed && ret >= 0 &&
1082 (ds->phys_mii_mask & (1 << ret))) {
cd28a1a9
FF		 1083 ret = dsa_slave_phy_connect(p, slave_dev, ret);
1084 if (ret)
1085 return ret;
1086 } else {
1087 p->phy = of_phy_connect(slave_dev, phy_dn,
1088 dsa_slave_adjust_link,
1089 phy_flags,
1090 p->phy_interface);
1091 }
1092 }
0d8bcdd3 1093
ce31b31c
FF		 1094 if (p->phy && phy_is_fixed)
1095 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
1096
0d8bcdd3
FF		 1097 /* We could not connect to a designated PHY, so use the switch internal
1098 * MDIO bus instead
1099 */
b31f65fb 1100 if (!p->phy) {
cd28a1a9 1101 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
c305c165
FF		 1102 if (ret)
1103 return ret;
b31f65fb 1104 } else {
a2ae6007
JP		 1105 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
1106 p->phy->addr, p->phy->drv->name);
b31f65fb 1107 }
9697f1cd
FF		 1108
1109 return 0;
0d8bcdd3
FF		 1110}
1111
448b4482
AL		 1112static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1113static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1114 struct netdev_queue *txq,
1115 void *_unused)
1116{
1117 lockdep_set_class(&txq->_xmit_lock,
1118 &dsa_slave_netdev_xmit_lock_key);
1119}
1120
24462549
FF		 1121int dsa_slave_suspend(struct net_device *slave_dev)
1122{
1123 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1124
24462549
FF		 1125 if (p->phy) {
1126 phy_stop(p->phy);
1127 p->old_pause = -1;
1128 p->old_link = -1;
1129 p->old_duplex = -1;
1130 phy_suspend(p->phy);
1131 }
1132
1133 return 0;
1134}
1135
1136int dsa_slave_resume(struct net_device *slave_dev)
1137{
1138 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1139
1140 netif_device_attach(slave_dev);
1141
1142 if (p->phy) {
1143 phy_resume(p->phy);
1144 phy_start(p->phy);
1145 }
1146
1147 return 0;
1148}
1149
d87d6f44
GR		 1150int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1151 int port, char *name)
91da11f8 1152{
e84665c9 1153 struct net_device *master = ds->dst->master_netdev;
91da11f8
LB		 1154 struct net_device *slave_dev;
1155 struct dsa_slave_priv *p;
1156 int ret;
1157
c835a677
TG		 1158 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1159 NET_NAME_UNKNOWN, ether_setup);
91da11f8 1160 if (slave_dev == NULL)
d87d6f44 1161 return -ENOMEM;
91da11f8
LB		 1162
1163 slave_dev->features = master->vlan_features;
7ad24ea4 1164 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
2fcc8005 1165 eth_hw_addr_inherit(slave_dev, master);
0a5f107b 1166 slave_dev->priv_flags |= IFF_NO_QUEUE;
3e8a72d1 1167 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
9d47c0a2 1168 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
f37db85d 1169 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
d442ad4a 1170
448b4482
AL		 1171 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1172 NULL);
1173
5075314e
AD		 1174 SET_NETDEV_DEV(slave_dev, parent);
1175 slave_dev->dev.of_node = ds->pd->port_dn[port];
1176 slave_dev->vlan_features = master->vlan_features;
1177
1178 p = netdev_priv(slave_dev);
1179 p->dev = slave_dev;
1180 p->parent = ds;
1181 p->port = port;
1182
e84665c9 1183 switch (ds->dst->tag_protocol) {
cf85d08f 1184#ifdef CONFIG_NET_DSA_TAG_DSA
ac7a04c3 1185 case DSA_TAG_PROTO_DSA:
5075314e 1186 p->xmit = dsa_netdev_ops.xmit;
cf85d08f
LB		 1187 break;
1188#endif
91da11f8 1189#ifdef CONFIG_NET_DSA_TAG_EDSA
ac7a04c3 1190 case DSA_TAG_PROTO_EDSA:
5075314e 1191 p->xmit = edsa_netdev_ops.xmit;
91da11f8 1192 break;
396138f0
LB		 1193#endif
1194#ifdef CONFIG_NET_DSA_TAG_TRAILER
ac7a04c3 1195 case DSA_TAG_PROTO_TRAILER:
5075314e 1196 p->xmit = trailer_netdev_ops.xmit;
396138f0 1197 break;
5037d532
FF		 1198#endif
1199#ifdef CONFIG_NET_DSA_TAG_BRCM
ac7a04c3 1200 case DSA_TAG_PROTO_BRCM:
5075314e 1201 p->xmit = brcm_netdev_ops.xmit;
5037d532 1202 break;
91da11f8
LB		 1203#endif
1204 default:
5075314e 1205 p->xmit = dsa_slave_notag_xmit;
5aed85ce 1206 break;
91da11f8 1207 }
d442ad4a 1208
0d8bcdd3
FF		 1209 p->old_pause = -1;
1210 p->old_link = -1;
1211 p->old_duplex = -1;
1212
9697f1cd
FF		 1213 ret = dsa_slave_phy_setup(p, slave_dev);
1214 if (ret) {
1215 free_netdev(slave_dev);
d87d6f44 1216 return ret;
9697f1cd 1217 }
91da11f8 1218
d87d6f44 1219 ds->ports[port] = slave_dev;
91da11f8
LB		 1220 ret = register_netdev(slave_dev);
1221 if (ret) {
a2ae6007
JP		 1222 netdev_err(master, "error %d registering interface %s\n",
1223 ret, slave_dev->name);
9697f1cd 1224 phy_disconnect(p->phy);
d87d6f44 1225 ds->ports[port] = NULL;
91da11f8 1226 free_netdev(slave_dev);
d87d6f44 1227 return ret;
91da11f8
LB		 1228 }
1229
1230 netif_carrier_off(slave_dev);
1231
d87d6f44 1232 return 0;
91da11f8 1233}
b73adef6
FF		 1234
1235static bool dsa_slave_dev_check(struct net_device *dev)
1236{
1237 return dev->netdev_ops == &dsa_slave_netdev_ops;
1238}
1239
1240static int dsa_slave_master_changed(struct net_device *dev)
1241{
1242 struct net_device *master = netdev_master_upper_dev_get(dev);
b06b107a 1243 struct dsa_slave_priv *p = netdev_priv(dev);
b73adef6
FF		 1244 int err = 0;
1245
1246 if (master && master->rtnl_link_ops &&
1247 !strcmp(master->rtnl_link_ops->kind, "bridge"))
1248 err = dsa_slave_bridge_port_join(dev, master);
b06b107a 1249 else if (dsa_port_is_bridged(p))
b73adef6
FF		 1250 err = dsa_slave_bridge_port_leave(dev);
1251
1252 return err;
1253}
1254
1255int dsa_slave_netdevice_event(struct notifier_block *unused,
1256 unsigned long event, void *ptr)
1257{
1258 struct net_device *dev;
1259 int err = 0;
1260
1261 switch (event) {
1262 case NETDEV_CHANGEUPPER:
1263 dev = netdev_notifier_info_to_dev(ptr);
1264 if (!dsa_slave_dev_check(dev))
1265 goto out;
1266
1267 err = dsa_slave_master_changed(dev);
1268 if (err)
1269 netdev_warn(dev, "failed to reflect master change\n");
1270
1271 break;
1272 }
1273
1274out:
1275 return NOTIFY_DONE;
1276}
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