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ASoC: wm_adsp: Use correct local length in error message
[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>
7f854420 18#include <linux/mdio.h>
b73adef6 19#include <net/rtnetlink.h>
98237d43 20#include <net/switchdev.h>
b73adef6 21#include <linux/if_bridge.h>
04ff53f9 22#include <linux/netpoll.h>
91da11f8
LB		 23#include "dsa_priv.h"
24
25/* slave mii_bus handling ***************************************************/
26static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
27{
28 struct dsa_switch *ds = bus->priv;
29
0d8bcdd3 30 if (ds->phys_mii_mask & (1 << addr))
91da11f8
LB		 31 return ds->drv->phy_read(ds, addr, reg);
32
33 return 0xffff;
34}
35
36static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
37{
38 struct dsa_switch *ds = bus->priv;
39
0d8bcdd3 40 if (ds->phys_mii_mask & (1 << addr))
91da11f8
LB		 41 return ds->drv->phy_write(ds, addr, reg, val);
42
43 return 0;
44}
45
46void dsa_slave_mii_bus_init(struct dsa_switch *ds)
47{
48 ds->slave_mii_bus->priv = (void *)ds;
49 ds->slave_mii_bus->name = "dsa slave smi";
50 ds->slave_mii_bus->read = dsa_slave_phy_read;
51 ds->slave_mii_bus->write = dsa_slave_phy_write;
f490be04
FF		 52 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x",
53 ds->index, ds->pd->sw_addr);
b4d2394d 54 ds->slave_mii_bus->parent = ds->master_dev;
24df8986 55 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
91da11f8
LB		 56}
57
58
59/* slave device handling ****************************************************/
abd2be00 60static int dsa_slave_get_iflink(const struct net_device *dev)
c0840801
LB		 61{
62 struct dsa_slave_priv *p = netdev_priv(dev);
c0840801 63
abd2be00 64 return p->parent->dst->master_netdev->ifindex;
c0840801
LB		 65}
66
b73adef6
FF		 67static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p)
68{
69 return !!p->bridge_dev;
70}
71
91da11f8
LB		 72static int dsa_slave_open(struct net_device *dev)
73{
df02c6ff 74 struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9 75 struct net_device *master = p->parent->dst->master_netdev;
b2f2af21 76 struct dsa_switch *ds = p->parent;
b73adef6
FF		 77 u8 stp_state = dsa_port_is_bridged(p) ?
78 BR_STATE_BLOCKING : BR_STATE_FORWARDING;
df02c6ff
LB		 79 int err;
80
81 if (!(master->flags & IFF_UP))
82 return -ENETDOWN;
83
8feedbb4 84 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
a748ee24 85 err = dev_uc_add(master, dev->dev_addr);
df02c6ff
LB		 86 if (err < 0)
87 goto out;
88 }
89
90 if (dev->flags & IFF_ALLMULTI) {
91 err = dev_set_allmulti(master, 1);
92 if (err < 0)
93 goto del_unicast;
94 }
95 if (dev->flags & IFF_PROMISC) {
96 err = dev_set_promiscuity(master, 1);
97 if (err < 0)
98 goto clear_allmulti;
99 }
100
b2f2af21
FF		 101 if (ds->drv->port_enable) {
102 err = ds->drv->port_enable(ds, p->port, p->phy);
103 if (err)
104 goto clear_promisc;
105 }
106
b73adef6
FF		 107 if (ds->drv->port_stp_update)
108 ds->drv->port_stp_update(ds, p->port, stp_state);
109
f7f1de51
FF		 110 if (p->phy)
111 phy_start(p->phy);
112
91da11f8 113 return 0;
df02c6ff 114
b2f2af21
FF		 115clear_promisc:
116 if (dev->flags & IFF_PROMISC)
4fdeddfe 117 dev_set_promiscuity(master, -1);
df02c6ff
LB		 118clear_allmulti:
119 if (dev->flags & IFF_ALLMULTI)
120 dev_set_allmulti(master, -1);
121del_unicast:
8feedbb4 122 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
a748ee24 123 dev_uc_del(master, dev->dev_addr);
df02c6ff
LB		 124out:
125 return err;
91da11f8
LB		 126}
127
128static int dsa_slave_close(struct net_device *dev)
129{
df02c6ff 130 struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9 131 struct net_device *master = p->parent->dst->master_netdev;
b2f2af21 132 struct dsa_switch *ds = p->parent;
df02c6ff 133
f7f1de51
FF		 134 if (p->phy)
135 phy_stop(p->phy);
136
df02c6ff 137 dev_mc_unsync(master, dev);
a748ee24 138 dev_uc_unsync(master, dev);
df02c6ff
LB		 139 if (dev->flags & IFF_ALLMULTI)
140 dev_set_allmulti(master, -1);
141 if (dev->flags & IFF_PROMISC)
142 dev_set_promiscuity(master, -1);
143
8feedbb4 144 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
a748ee24 145 dev_uc_del(master, dev->dev_addr);
df02c6ff 146
b2f2af21
FF		 147 if (ds->drv->port_disable)
148 ds->drv->port_disable(ds, p->port, p->phy);
149
b73adef6
FF		 150 if (ds->drv->port_stp_update)
151 ds->drv->port_stp_update(ds, p->port, BR_STATE_DISABLED);
152
91da11f8
LB		 153 return 0;
154}
155
156static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
157{
158 struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9 159 struct net_device *master = p->parent->dst->master_netdev;
91da11f8
LB		 160
161 if (change & IFF_ALLMULTI)
162 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
163 if (change & IFF_PROMISC)
164 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
165}
166
167static void dsa_slave_set_rx_mode(struct net_device *dev)
168{
169 struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9 170 struct net_device *master = p->parent->dst->master_netdev;
91da11f8
LB		 171
172 dev_mc_sync(master, dev);
a748ee24 173 dev_uc_sync(master, dev);
91da11f8
LB		 174}
175
df02c6ff 176static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
91da11f8 177{
df02c6ff 178 struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9 179 struct net_device *master = p->parent->dst->master_netdev;
df02c6ff
LB		 180 struct sockaddr *addr = a;
181 int err;
182
183 if (!is_valid_ether_addr(addr->sa_data))
184 return -EADDRNOTAVAIL;
185
186 if (!(dev->flags & IFF_UP))
187 goto out;
188
8feedbb4 189 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
a748ee24 190 err = dev_uc_add(master, addr->sa_data);
df02c6ff
LB		 191 if (err < 0)
192 return err;
193 }
194
8feedbb4 195 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
a748ee24 196 dev_uc_del(master, dev->dev_addr);
df02c6ff
LB		 197
198out:
d08f161a 199 ether_addr_copy(dev->dev_addr, addr->sa_data);
91da11f8
LB		 200
201 return 0;
202}
203
11149536
VD		 204static int dsa_bridge_check_vlan_range(struct dsa_switch *ds,
205 const struct net_device *bridge,
206 u16 vid_begin, u16 vid_end)
207{
208 struct dsa_slave_priv *p;
209 struct net_device *dev, *vlan_br;
210 DECLARE_BITMAP(members, DSA_MAX_PORTS);
211 DECLARE_BITMAP(untagged, DSA_MAX_PORTS);
212 u16 vid;
213 int member, err;
214
215 if (!ds->drv->vlan_getnext || !vid_begin)
216 return -EOPNOTSUPP;
217
218 vid = vid_begin - 1;
219
220 do {
221 err = ds->drv->vlan_getnext(ds, &vid, members, untagged);
222 if (err)
223 break;
224
225 if (vid > vid_end)
226 break;
227
228 member = find_first_bit(members, DSA_MAX_PORTS);
229 if (member == DSA_MAX_PORTS)
230 continue;
231
232 dev = ds->ports[member];
233 p = netdev_priv(dev);
234 vlan_br = p->bridge_dev;
235 if (vlan_br == bridge)
236 continue;
237
238 netdev_dbg(vlan_br, "hardware VLAN %d already in use\n", vid);
239 return -EOPNOTSUPP;
240 } while (vid < vid_end);
241
242 return err == -ENOENT ? 0 : err;
243}
244
245static int dsa_slave_port_vlan_add(struct net_device *dev,
8f24f309 246 const struct switchdev_obj_port_vlan *vlan,
f8db8348 247 struct switchdev_trans *trans)
11149536 248{
11149536
VD		 249 struct dsa_slave_priv *p = netdev_priv(dev);
250 struct dsa_switch *ds = p->parent;
11149536
VD		 251 int err;
252
79a62eb2 253 if (switchdev_trans_ph_prepare(trans)) {
76e398a6 254 if (!ds->drv->port_vlan_prepare || !ds->drv->port_vlan_add)
11149536
VD		 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;
76e398a6
VD		 265
266 err = ds->drv->port_vlan_prepare(ds, p->port, vlan, trans);
267 if (err)
268 return err;
79a62eb2 269 } else {
76e398a6
VD		 270 err = ds->drv->port_vlan_add(ds, p->port, vlan, trans);
271 if (err)
272 return err;
11149536
VD		 273 }
274
275 return 0;
276}
277
278static int dsa_slave_port_vlan_del(struct net_device *dev,
8f24f309 279 const struct switchdev_obj_port_vlan *vlan)
11149536 280{
11149536
VD		 281 struct dsa_slave_priv *p = netdev_priv(dev);
282 struct dsa_switch *ds = p->parent;
11149536
VD		 283
284 if (!ds->drv->port_vlan_del)
285 return -EOPNOTSUPP;
286
76e398a6 287 return ds->drv->port_vlan_del(ds, p->port, vlan);
11149536
VD		 288}
289
290static int dsa_slave_port_vlan_dump(struct net_device *dev,
8f24f309 291 struct switchdev_obj_port_vlan *vlan,
648b4a99 292 switchdev_obj_dump_cb_t *cb)
11149536 293{
11149536
VD		 294 struct dsa_slave_priv *p = netdev_priv(dev);
295 struct dsa_switch *ds = p->parent;
296 DECLARE_BITMAP(members, DSA_MAX_PORTS);
297 DECLARE_BITMAP(untagged, DSA_MAX_PORTS);
298 u16 pvid, vid = 0;
299 int err;
300
301 if (!ds->drv->vlan_getnext || !ds->drv->port_pvid_get)
302 return -EOPNOTSUPP;
303
304 err = ds->drv->port_pvid_get(ds, p->port, &pvid);
305 if (err)
306 return err;
307
308 for (;;) {
309 err = ds->drv->vlan_getnext(ds, &vid, members, untagged);
310 if (err)
311 break;
312
313 if (!test_bit(p->port, members))
314 continue;
315
316 memset(vlan, 0, sizeof(*vlan));
317 vlan->vid_begin = vlan->vid_end = vid;
318
319 if (vid == pvid)
320 vlan->flags |= BRIDGE_VLAN_INFO_PVID;
321
322 if (test_bit(p->port, untagged))
323 vlan->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
324
648b4a99 325 err = cb(&vlan->obj);
11149536
VD		 326 if (err)
327 break;
328 }
329
330 return err == -ENOENT ? 0 : err;
331}
332
ba14d9eb 333static int dsa_slave_port_fdb_add(struct net_device *dev,
52ba57cf 334 const struct switchdev_obj_port_fdb *fdb,
f8db8348 335 struct switchdev_trans *trans)
cdf09697
DM		 336{
337 struct dsa_slave_priv *p = netdev_priv(dev);
338 struct dsa_switch *ds = p->parent;
146a3206
VD		 339 int ret;
340
341 if (!ds->drv->port_fdb_prepare || !ds->drv->port_fdb_add)
342 return -EOPNOTSUPP;
cdf09697 343
79a62eb2 344 if (switchdev_trans_ph_prepare(trans))
146a3206 345 ret = ds->drv->port_fdb_prepare(ds, p->port, fdb, trans);
79a62eb2 346 else
1f36faf2 347 ret = ds->drv->port_fdb_add(ds, p->port, fdb, trans);
cdf09697
DM		 348
349 return ret;
350}
351
ba14d9eb 352static int dsa_slave_port_fdb_del(struct net_device *dev,
52ba57cf 353 const struct switchdev_obj_port_fdb *fdb)
cdf09697
DM		 354{
355 struct dsa_slave_priv *p = netdev_priv(dev);
356 struct dsa_switch *ds = p->parent;
357 int ret = -EOPNOTSUPP;
358
2a778e1b 359 if (ds->drv->port_fdb_del)
8057b3e7 360 ret = ds->drv->port_fdb_del(ds, p->port, fdb);
cdf09697
DM		 361
362 return ret;
363}
364
ba14d9eb 365static int dsa_slave_port_fdb_dump(struct net_device *dev,
52ba57cf 366 struct switchdev_obj_port_fdb *fdb,
648b4a99 367 switchdev_obj_dump_cb_t *cb)
cdf09697
DM		 368{
369 struct dsa_slave_priv *p = netdev_priv(dev);
370 struct dsa_switch *ds = p->parent;
cdf09697 371
ea70ba98
VD		 372 if (ds->drv->port_fdb_dump)
373 return ds->drv->port_fdb_dump(ds, p->port, fdb, cb);
374
1a49a2fb 375 return -EOPNOTSUPP;
cdf09697
DM		 376}
377
91da11f8
LB		 378static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
379{
380 struct dsa_slave_priv *p = netdev_priv(dev);
91da11f8
LB		 381
382 if (p->phy != NULL)
28b04113 383 return phy_mii_ioctl(p->phy, ifr, cmd);
91da11f8
LB		 384
385 return -EOPNOTSUPP;
386}
387
b73adef6
FF		 388/* Return a bitmask of all ports being currently bridged within a given bridge
389 * device. Note that on leave, the mask will still return the bitmask of ports
390 * currently bridged, prior to port removal, and this is exactly what we want.
391 */
392static u32 dsa_slave_br_port_mask(struct dsa_switch *ds,
393 struct net_device *bridge)
394{
395 struct dsa_slave_priv *p;
396 unsigned int port;
397 u32 mask = 0;
398
399 for (port = 0; port < DSA_MAX_PORTS; port++) {
d79d2107 400 if (!dsa_is_port_initialized(ds, port))
b73adef6
FF		 401 continue;
402
403 p = netdev_priv(ds->ports[port]);
404
405 if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT &&
406 p->bridge_dev == bridge)
407 mask |= 1 << port;
408 }
409
410 return mask;
411}
412
413static int dsa_slave_stp_update(struct net_device *dev, u8 state)
414{
415 struct dsa_slave_priv *p = netdev_priv(dev);
416 struct dsa_switch *ds = p->parent;
417 int ret = -EOPNOTSUPP;
418
419 if (ds->drv->port_stp_update)
420 ret = ds->drv->port_stp_update(ds, p->port, state);
421
422 return ret;
423}
424
35636062 425static int dsa_slave_port_attr_set(struct net_device *dev,
f7fadf30 426 const struct switchdev_attr *attr,
7ea6eb3f 427 struct switchdev_trans *trans)
35636062 428{
b8d866ac
VD		 429 struct dsa_slave_priv *p = netdev_priv(dev);
430 struct dsa_switch *ds = p->parent;
431 int ret;
35636062
SF		 432
433 switch (attr->id) {
1f868398 434 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
b8d866ac
VD		 435 if (switchdev_trans_ph_prepare(trans))
436 ret = ds->drv->port_stp_update ? 0 : -EOPNOTSUPP;
437 else
438 ret = ds->drv->port_stp_update(ds, p->port,
439 attr->u.stp_state);
35636062
SF		 440 break;
441 default:
442 ret = -EOPNOTSUPP;
443 break;
444 }
445
446 return ret;
447}
448
ba14d9eb 449static int dsa_slave_port_obj_add(struct net_device *dev,
648b4a99 450 const struct switchdev_obj *obj,
7ea6eb3f 451 struct switchdev_trans *trans)
ba14d9eb
VD		 452{
453 int err;
454
455 /* For the prepare phase, ensure the full set of changes is feasable in
456 * one go in order to signal a failure properly. If an operation is not
457 * supported, return -EOPNOTSUPP.
458 */
459
9e8f4a54 460 switch (obj->id) {
57d80838 461 case SWITCHDEV_OBJ_ID_PORT_FDB:
648b4a99
JP		 462 err = dsa_slave_port_fdb_add(dev,
463 SWITCHDEV_OBJ_PORT_FDB(obj),
464 trans);
ba14d9eb 465 break;
57d80838 466 case SWITCHDEV_OBJ_ID_PORT_VLAN:
648b4a99
JP		 467 err = dsa_slave_port_vlan_add(dev,
468 SWITCHDEV_OBJ_PORT_VLAN(obj),
469 trans);
11149536 470 break;
ba14d9eb
VD		 471 default:
472 err = -EOPNOTSUPP;
473 break;
474 }
475
476 return err;
477}
478
479static int dsa_slave_port_obj_del(struct net_device *dev,
648b4a99 480 const struct switchdev_obj *obj)
ba14d9eb
VD		 481{
482 int err;
483
9e8f4a54 484 switch (obj->id) {
57d80838 485 case SWITCHDEV_OBJ_ID_PORT_FDB:
648b4a99
JP		 486 err = dsa_slave_port_fdb_del(dev,
487 SWITCHDEV_OBJ_PORT_FDB(obj));
ba14d9eb 488 break;
57d80838 489 case SWITCHDEV_OBJ_ID_PORT_VLAN:
648b4a99
JP		 490 err = dsa_slave_port_vlan_del(dev,
491 SWITCHDEV_OBJ_PORT_VLAN(obj));
11149536 492 break;
ba14d9eb
VD		 493 default:
494 err = -EOPNOTSUPP;
495 break;
496 }
497
498 return err;
499}
500
501static int dsa_slave_port_obj_dump(struct net_device *dev,
648b4a99
JP		 502 struct switchdev_obj *obj,
503 switchdev_obj_dump_cb_t *cb)
ba14d9eb
VD		 504{
505 int err;
506
9e8f4a54 507 switch (obj->id) {
57d80838 508 case SWITCHDEV_OBJ_ID_PORT_FDB:
648b4a99
JP		 509 err = dsa_slave_port_fdb_dump(dev,
510 SWITCHDEV_OBJ_PORT_FDB(obj),
511 cb);
ba14d9eb 512 break;
57d80838 513 case SWITCHDEV_OBJ_ID_PORT_VLAN:
648b4a99
JP		 514 err = dsa_slave_port_vlan_dump(dev,
515 SWITCHDEV_OBJ_PORT_VLAN(obj),
516 cb);
11149536 517 break;
ba14d9eb
VD		 518 default:
519 err = -EOPNOTSUPP;
520 break;
521 }
522
523 return err;
524}
525
b73adef6
FF		 526static int dsa_slave_bridge_port_join(struct net_device *dev,
527 struct net_device *br)
528{
529 struct dsa_slave_priv *p = netdev_priv(dev);
530 struct dsa_switch *ds = p->parent;
531 int ret = -EOPNOTSUPP;
532
533 p->bridge_dev = br;
534
535 if (ds->drv->port_join_bridge)
536 ret = ds->drv->port_join_bridge(ds, p->port,
537 dsa_slave_br_port_mask(ds, br));
538
539 return ret;
540}
541
542static int dsa_slave_bridge_port_leave(struct net_device *dev)
543{
544 struct dsa_slave_priv *p = netdev_priv(dev);
545 struct dsa_switch *ds = p->parent;
546 int ret = -EOPNOTSUPP;
547
548
549 if (ds->drv->port_leave_bridge)
550 ret = ds->drv->port_leave_bridge(ds, p->port,
551 dsa_slave_br_port_mask(ds, p->bridge_dev));
552
553 p->bridge_dev = NULL;
554
555 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
556 * so allow it to be in BR_STATE_FORWARDING to be kept functional
557 */
558 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
559
560 return ret;
561}
562
f8e20a9f
SF		 563static int dsa_slave_port_attr_get(struct net_device *dev,
564 struct switchdev_attr *attr)
b73adef6
FF		 565{
566 struct dsa_slave_priv *p = netdev_priv(dev);
567 struct dsa_switch *ds = p->parent;
568
f8e20a9f 569 switch (attr->id) {
1f868398 570 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
42275bd8
SF		 571 attr->u.ppid.id_len = sizeof(ds->index);
572 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
f8e20a9f
SF		 573 break;
574 default:
575 return -EOPNOTSUPP;
576 }
b73adef6
FF		 577
578 return 0;
579}
580
04ff53f9
FF		 581static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
582 struct sk_buff *skb)
583{
584#ifdef CONFIG_NET_POLL_CONTROLLER
585 if (p->netpoll)
586 netpoll_send_skb(p->netpoll, skb);
587#else
588 BUG();
589#endif
590 return NETDEV_TX_OK;
591}
592
3e8a72d1
FF		 593static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
594{
595 struct dsa_slave_priv *p = netdev_priv(dev);
4ed70ce9 596 struct sk_buff *nskb;
3e8a72d1 597
4ed70ce9
FF		 598 dev->stats.tx_packets++;
599 dev->stats.tx_bytes += skb->len;
3e8a72d1 600
4ed70ce9
FF		 601 /* Transmit function may have to reallocate the original SKB */
602 nskb = p->xmit(skb, dev);
603 if (!nskb)
604 return NETDEV_TX_OK;
5aed85ce 605
04ff53f9
FF		 606 /* SKB for netpoll still need to be mangled with the protocol-specific
607 * tag to be successfully transmitted
608 */
609 if (unlikely(netpoll_tx_running(dev)))
610 return dsa_netpoll_send_skb(p, nskb);
611
4ed70ce9
FF		 612 /* Queue the SKB for transmission on the parent interface, but
613 * do not modify its EtherType
614 */
615 nskb->dev = p->parent->dst->master_netdev;
616 dev_queue_xmit(nskb);
5aed85ce
FF		 617
618 return NETDEV_TX_OK;
619}
620
4ed70ce9
FF		 621static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
622 struct net_device *dev)
623{
624 /* Just return the original SKB */
625 return skb;
626}
627
91da11f8
LB		 628
629/* ethtool operations *******************************************************/
630static int
631dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
632{
633 struct dsa_slave_priv *p = netdev_priv(dev);
634 int err;
635
636 err = -EOPNOTSUPP;
637 if (p->phy != NULL) {
638 err = phy_read_status(p->phy);
639 if (err == 0)
640 err = phy_ethtool_gset(p->phy, cmd);
641 }
642
643 return err;
644}
645
646static int
647dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
648{
649 struct dsa_slave_priv *p = netdev_priv(dev);
650
651 if (p->phy != NULL)
652 return phy_ethtool_sset(p->phy, cmd);
653
654 return -EOPNOTSUPP;
655}
656
657static void dsa_slave_get_drvinfo(struct net_device *dev,
658 struct ethtool_drvinfo *drvinfo)
659{
7826d43f
JP		 660 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
661 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
662 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
663 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
91da11f8
LB		 664}
665
3d762a0f
GR		 666static int dsa_slave_get_regs_len(struct net_device *dev)
667{
668 struct dsa_slave_priv *p = netdev_priv(dev);
669 struct dsa_switch *ds = p->parent;
670
671 if (ds->drv->get_regs_len)
672 return ds->drv->get_regs_len(ds, p->port);
673
674 return -EOPNOTSUPP;
675}
676
677static void
678dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
679{
680 struct dsa_slave_priv *p = netdev_priv(dev);
681 struct dsa_switch *ds = p->parent;
682
683 if (ds->drv->get_regs)
684 ds->drv->get_regs(ds, p->port, regs, _p);
685}
686
91da11f8
LB		 687static int dsa_slave_nway_reset(struct net_device *dev)
688{
689 struct dsa_slave_priv *p = netdev_priv(dev);
690
691 if (p->phy != NULL)
692 return genphy_restart_aneg(p->phy);
693
694 return -EOPNOTSUPP;
695}
696
697static u32 dsa_slave_get_link(struct net_device *dev)
698{
699 struct dsa_slave_priv *p = netdev_priv(dev);
700
701 if (p->phy != NULL) {
702 genphy_update_link(p->phy);
703 return p->phy->link;
704 }
705
706 return -EOPNOTSUPP;
707}
708
6793abb4
GR		 709static int dsa_slave_get_eeprom_len(struct net_device *dev)
710{
711 struct dsa_slave_priv *p = netdev_priv(dev);
712 struct dsa_switch *ds = p->parent;
713
714 if (ds->pd->eeprom_len)
715 return ds->pd->eeprom_len;
716
717 if (ds->drv->get_eeprom_len)
718 return ds->drv->get_eeprom_len(ds);
719
720 return 0;
721}
722
723static int dsa_slave_get_eeprom(struct net_device *dev,
724 struct ethtool_eeprom *eeprom, u8 *data)
725{
726 struct dsa_slave_priv *p = netdev_priv(dev);
727 struct dsa_switch *ds = p->parent;
728
729 if (ds->drv->get_eeprom)
730 return ds->drv->get_eeprom(ds, eeprom, data);
731
732 return -EOPNOTSUPP;
733}
734
735static int dsa_slave_set_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->set_eeprom)
742 return ds->drv->set_eeprom(ds, eeprom, data);
743
744 return -EOPNOTSUPP;
745}
746
91da11f8
LB		 747static void dsa_slave_get_strings(struct net_device *dev,
748 uint32_t stringset, uint8_t *data)
749{
750 struct dsa_slave_priv *p = netdev_priv(dev);
751 struct dsa_switch *ds = p->parent;
752
753 if (stringset == ETH_SS_STATS) {
754 int len = ETH_GSTRING_LEN;
755
756 strncpy(data, "tx_packets", len);
757 strncpy(data + len, "tx_bytes", len);
758 strncpy(data + 2 * len, "rx_packets", len);
759 strncpy(data + 3 * len, "rx_bytes", len);
760 if (ds->drv->get_strings != NULL)
761 ds->drv->get_strings(ds, p->port, data + 4 * len);
762 }
763}
764
765static void dsa_slave_get_ethtool_stats(struct net_device *dev,
766 struct ethtool_stats *stats,
767 uint64_t *data)
768{
769 struct dsa_slave_priv *p = netdev_priv(dev);
770 struct dsa_switch *ds = p->parent;
771
772 data[0] = p->dev->stats.tx_packets;
773 data[1] = p->dev->stats.tx_bytes;
774 data[2] = p->dev->stats.rx_packets;
775 data[3] = p->dev->stats.rx_bytes;
776 if (ds->drv->get_ethtool_stats != NULL)
777 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
778}
779
780static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
781{
782 struct dsa_slave_priv *p = netdev_priv(dev);
783 struct dsa_switch *ds = p->parent;
784
785 if (sset == ETH_SS_STATS) {
786 int count;
787
788 count = 4;
789 if (ds->drv->get_sset_count != NULL)
790 count += ds->drv->get_sset_count(ds);
791
792 return count;
793 }
794
795 return -EOPNOTSUPP;
796}
797
19e57c4e
FF		 798static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
799{
800 struct dsa_slave_priv *p = netdev_priv(dev);
801 struct dsa_switch *ds = p->parent;
802
803 if (ds->drv->get_wol)
804 ds->drv->get_wol(ds, p->port, w);
805}
806
807static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
808{
809 struct dsa_slave_priv *p = netdev_priv(dev);
810 struct dsa_switch *ds = p->parent;
811 int ret = -EOPNOTSUPP;
812
813 if (ds->drv->set_wol)
814 ret = ds->drv->set_wol(ds, p->port, w);
815
816 return ret;
817}
818
7905288f
FF		 819static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
820{
821 struct dsa_slave_priv *p = netdev_priv(dev);
822 struct dsa_switch *ds = p->parent;
823 int ret;
824
825 if (!ds->drv->set_eee)
826 return -EOPNOTSUPP;
827
828 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
829 if (ret)
830 return ret;
831
832 if (p->phy)
833 ret = phy_ethtool_set_eee(p->phy, e);
834
835 return ret;
836}
837
838static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
839{
840 struct dsa_slave_priv *p = netdev_priv(dev);
841 struct dsa_switch *ds = p->parent;
842 int ret;
843
844 if (!ds->drv->get_eee)
845 return -EOPNOTSUPP;
846
847 ret = ds->drv->get_eee(ds, p->port, e);
848 if (ret)
849 return ret;
850
851 if (p->phy)
852 ret = phy_ethtool_get_eee(p->phy, e);
853
854 return ret;
855}
856
04ff53f9
FF		 857#ifdef CONFIG_NET_POLL_CONTROLLER
858static int dsa_slave_netpoll_setup(struct net_device *dev,
859 struct netpoll_info *ni)
860{
861 struct dsa_slave_priv *p = netdev_priv(dev);
862 struct dsa_switch *ds = p->parent;
863 struct net_device *master = ds->dst->master_netdev;
864 struct netpoll *netpoll;
865 int err = 0;
866
867 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
868 if (!netpoll)
869 return -ENOMEM;
870
871 err = __netpoll_setup(netpoll, master);
872 if (err) {
873 kfree(netpoll);
874 goto out;
875 }
876
877 p->netpoll = netpoll;
878out:
879 return err;
880}
881
882static void dsa_slave_netpoll_cleanup(struct net_device *dev)
883{
884 struct dsa_slave_priv *p = netdev_priv(dev);
885 struct netpoll *netpoll = p->netpoll;
886
887 if (!netpoll)
888 return;
889
890 p->netpoll = NULL;
891
892 __netpoll_free_async(netpoll);
893}
894
895static void dsa_slave_poll_controller(struct net_device *dev)
896{
897}
898#endif
899
91da11f8
LB		 900static const struct ethtool_ops dsa_slave_ethtool_ops = {
901 .get_settings = dsa_slave_get_settings,
902 .set_settings = dsa_slave_set_settings,
903 .get_drvinfo = dsa_slave_get_drvinfo,
3d762a0f
GR		 904 .get_regs_len = dsa_slave_get_regs_len,
905 .get_regs = dsa_slave_get_regs,
91da11f8
LB		 906 .nway_reset = dsa_slave_nway_reset,
907 .get_link = dsa_slave_get_link,
6793abb4
GR		 908 .get_eeprom_len = dsa_slave_get_eeprom_len,
909 .get_eeprom = dsa_slave_get_eeprom,
910 .set_eeprom = dsa_slave_set_eeprom,
91da11f8
LB		 911 .get_strings = dsa_slave_get_strings,
912 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
913 .get_sset_count = dsa_slave_get_sset_count,
19e57c4e
FF		 914 .set_wol = dsa_slave_set_wol,
915 .get_wol = dsa_slave_get_wol,
7905288f
FF		 916 .set_eee = dsa_slave_set_eee,
917 .get_eee = dsa_slave_get_eee,
91da11f8
LB		 918};
919
3e8a72d1 920static const struct net_device_ops dsa_slave_netdev_ops = {
d442ad4a
SH		 921 .ndo_open = dsa_slave_open,
922 .ndo_stop = dsa_slave_close,
3e8a72d1 923 .ndo_start_xmit = dsa_slave_xmit,
d442ad4a
SH		 924 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
925 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
d442ad4a 926 .ndo_set_mac_address = dsa_slave_set_mac_address,
ba14d9eb
VD		 927 .ndo_fdb_add = switchdev_port_fdb_add,
928 .ndo_fdb_del = switchdev_port_fdb_del,
929 .ndo_fdb_dump = switchdev_port_fdb_dump,
d442ad4a 930 .ndo_do_ioctl = dsa_slave_ioctl,
abd2be00 931 .ndo_get_iflink = dsa_slave_get_iflink,
04ff53f9
FF		 932#ifdef CONFIG_NET_POLL_CONTROLLER
933 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
934 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
935 .ndo_poll_controller = dsa_slave_poll_controller,
936#endif
11149536
VD		 937 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
938 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
939 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
98237d43
SF		 940};
941
9d47c0a2 942static const struct switchdev_ops dsa_slave_switchdev_ops = {
f8e20a9f 943 .switchdev_port_attr_get = dsa_slave_port_attr_get,
35636062 944 .switchdev_port_attr_set = dsa_slave_port_attr_set,
ba14d9eb
VD		 945 .switchdev_port_obj_add = dsa_slave_port_obj_add,
946 .switchdev_port_obj_del = dsa_slave_port_obj_del,
947 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
d442ad4a 948};
91da11f8 949
f37db85d
FF		 950static struct device_type dsa_type = {
951 .name = "dsa",
952};
953
0d8bcdd3
FF		 954static void dsa_slave_adjust_link(struct net_device *dev)
955{
956 struct dsa_slave_priv *p = netdev_priv(dev);
ec9436ba 957 struct dsa_switch *ds = p->parent;
0d8bcdd3
FF		 958 unsigned int status_changed = 0;
959
960 if (p->old_link != p->phy->link) {
961 status_changed = 1;
962 p->old_link = p->phy->link;
963 }
964
965 if (p->old_duplex != p->phy->duplex) {
966 status_changed = 1;
967 p->old_duplex = p->phy->duplex;
968 }
969
970 if (p->old_pause != p->phy->pause) {
971 status_changed = 1;
972 p->old_pause = p->phy->pause;
973 }
974
ec9436ba
FF		 975 if (ds->drv->adjust_link && status_changed)
976 ds->drv->adjust_link(ds, p->port, p->phy);
977
0d8bcdd3
FF		 978 if (status_changed)
979 phy_print_status(p->phy);
980}
981
ce31b31c
FF		 982static int dsa_slave_fixed_link_update(struct net_device *dev,
983 struct fixed_phy_status *status)
984{
985 struct dsa_slave_priv *p = netdev_priv(dev);
986 struct dsa_switch *ds = p->parent;
987
988 if (ds->drv->fixed_link_update)
989 ds->drv->fixed_link_update(ds, p->port, status);
990
991 return 0;
992}
993
91da11f8 994/* slave device setup *******************************************************/
c305c165 995static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
cd28a1a9
FF		 996 struct net_device *slave_dev,
997 int addr)
c305c165
FF		 998{
999 struct dsa_switch *ds = p->parent;
1000
7f854420 1001 p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr);
d25b8e74
RK		 1002 if (!p->phy) {
1003 netdev_err(slave_dev, "no phy at %d\n", addr);
c305c165 1004 return -ENODEV;
d25b8e74 1005 }
c305c165
FF		 1006
1007 /* Use already configured phy mode */
211c504a
FF		 1008 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1009 p->phy_interface = p->phy->interface;
c305c165
FF		 1010 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
1011 p->phy_interface);
1012
1013 return 0;
1014}
1015
9697f1cd 1016static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
0d8bcdd3
FF		 1017 struct net_device *slave_dev)
1018{
1019 struct dsa_switch *ds = p->parent;
1020 struct dsa_chip_data *cd = ds->pd;
1021 struct device_node *phy_dn, *port_dn;
ce31b31c 1022 bool phy_is_fixed = false;
6819563e 1023 u32 phy_flags = 0;
19334920 1024 int mode, ret;
0d8bcdd3
FF		 1025
1026 port_dn = cd->port_dn[p->port];
19334920
GR		 1027 mode = of_get_phy_mode(port_dn);
1028 if (mode < 0)
1029 mode = PHY_INTERFACE_MODE_NA;
1030 p->phy_interface = mode;
0d8bcdd3
FF		 1031
1032 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1033 if (of_phy_is_fixed_link(port_dn)) {
1034 /* In the case of a fixed PHY, the DT node associated
1035 * to the fixed PHY is the Port DT node
1036 */
1037 ret = of_phy_register_fixed_link(port_dn);
1038 if (ret) {
d25b8e74 1039 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
9697f1cd 1040 return ret;
0d8bcdd3 1041 }
ce31b31c 1042 phy_is_fixed = true;
0d8bcdd3
FF		 1043 phy_dn = port_dn;
1044 }
1045
6819563e
FF		 1046 if (ds->drv->get_phy_flags)
1047 phy_flags = ds->drv->get_phy_flags(ds, p->port);
1048
cd28a1a9 1049 if (phy_dn) {
d25b8e74
RK		 1050 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
1051
cd28a1a9
FF		 1052 /* If this PHY address is part of phys_mii_mask, which means
1053 * that we need to divert reads and writes to/from it, then we
1054 * want to bind this device using the slave MII bus created by
1055 * DSA to make that happen.
1056 */
d25b8e74
RK		 1057 if (!phy_is_fixed && phy_id >= 0 &&
1058 (ds->phys_mii_mask & (1 << phy_id))) {
1059 ret = dsa_slave_phy_connect(p, slave_dev, phy_id);
1060 if (ret) {
1061 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret);
cd28a1a9 1062 return ret;
d25b8e74 1063 }
cd28a1a9
FF		 1064 } else {
1065 p->phy = of_phy_connect(slave_dev, phy_dn,
1066 dsa_slave_adjust_link,
1067 phy_flags,
1068 p->phy_interface);
1069 }
1070 }
0d8bcdd3 1071
ce31b31c
FF		 1072 if (p->phy && phy_is_fixed)
1073 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
1074
0d8bcdd3
FF		 1075 /* We could not connect to a designated PHY, so use the switch internal
1076 * MDIO bus instead
1077 */
b31f65fb 1078 if (!p->phy) {
cd28a1a9 1079 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
d25b8e74
RK		 1080 if (ret) {
1081 netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret);
c305c165 1082 return ret;
d25b8e74 1083 }
b31f65fb 1084 }
9697f1cd 1085
2220943a
AL		 1086 phy_attached_info(p->phy);
1087
9697f1cd 1088 return 0;
0d8bcdd3
FF		 1089}
1090
448b4482
AL		 1091static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1092static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1093 struct netdev_queue *txq,
1094 void *_unused)
1095{
1096 lockdep_set_class(&txq->_xmit_lock,
1097 &dsa_slave_netdev_xmit_lock_key);
1098}
1099
24462549
FF		 1100int dsa_slave_suspend(struct net_device *slave_dev)
1101{
1102 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1103
24462549
FF		 1104 if (p->phy) {
1105 phy_stop(p->phy);
1106 p->old_pause = -1;
1107 p->old_link = -1;
1108 p->old_duplex = -1;
1109 phy_suspend(p->phy);
1110 }
1111
1112 return 0;
1113}
1114
1115int dsa_slave_resume(struct net_device *slave_dev)
1116{
1117 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1118
1119 netif_device_attach(slave_dev);
1120
1121 if (p->phy) {
1122 phy_resume(p->phy);
1123 phy_start(p->phy);
1124 }
1125
1126 return 0;
1127}
1128
d87d6f44
GR		 1129int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1130 int port, char *name)
91da11f8 1131{
e84665c9 1132 struct net_device *master = ds->dst->master_netdev;
91da11f8
LB		 1133 struct net_device *slave_dev;
1134 struct dsa_slave_priv *p;
1135 int ret;
1136
c835a677
TG		 1137 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1138 NET_NAME_UNKNOWN, ether_setup);
91da11f8 1139 if (slave_dev == NULL)
d87d6f44 1140 return -ENOMEM;
91da11f8
LB		 1141
1142 slave_dev->features = master->vlan_features;
7ad24ea4 1143 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
2fcc8005 1144 eth_hw_addr_inherit(slave_dev, master);
0a5f107b 1145 slave_dev->priv_flags |= IFF_NO_QUEUE;
3e8a72d1 1146 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
9d47c0a2 1147 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
f37db85d 1148 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
d442ad4a 1149
448b4482
AL		 1150 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1151 NULL);
1152
5075314e
AD		 1153 SET_NETDEV_DEV(slave_dev, parent);
1154 slave_dev->dev.of_node = ds->pd->port_dn[port];
1155 slave_dev->vlan_features = master->vlan_features;
1156
1157 p = netdev_priv(slave_dev);
1158 p->dev = slave_dev;
1159 p->parent = ds;
1160 p->port = port;
1161
e84665c9 1162 switch (ds->dst->tag_protocol) {
cf85d08f 1163#ifdef CONFIG_NET_DSA_TAG_DSA
ac7a04c3 1164 case DSA_TAG_PROTO_DSA:
5075314e 1165 p->xmit = dsa_netdev_ops.xmit;
cf85d08f
LB		 1166 break;
1167#endif
91da11f8 1168#ifdef CONFIG_NET_DSA_TAG_EDSA
ac7a04c3 1169 case DSA_TAG_PROTO_EDSA:
5075314e 1170 p->xmit = edsa_netdev_ops.xmit;
91da11f8 1171 break;
396138f0
LB		 1172#endif
1173#ifdef CONFIG_NET_DSA_TAG_TRAILER
ac7a04c3 1174 case DSA_TAG_PROTO_TRAILER:
5075314e 1175 p->xmit = trailer_netdev_ops.xmit;
396138f0 1176 break;
5037d532
FF		 1177#endif
1178#ifdef CONFIG_NET_DSA_TAG_BRCM
ac7a04c3 1179 case DSA_TAG_PROTO_BRCM:
5075314e 1180 p->xmit = brcm_netdev_ops.xmit;
5037d532 1181 break;
91da11f8
LB		 1182#endif
1183 default:
5075314e 1184 p->xmit = dsa_slave_notag_xmit;
5aed85ce 1185 break;
91da11f8 1186 }
d442ad4a 1187
0d8bcdd3
FF		 1188 p->old_pause = -1;
1189 p->old_link = -1;
1190 p->old_duplex = -1;
1191
d87d6f44 1192 ds->ports[port] = slave_dev;
91da11f8
LB		 1193 ret = register_netdev(slave_dev);
1194 if (ret) {
a2ae6007
JP		 1195 netdev_err(master, "error %d registering interface %s\n",
1196 ret, slave_dev->name);
9697f1cd 1197 phy_disconnect(p->phy);
d87d6f44 1198 ds->ports[port] = NULL;
91da11f8 1199 free_netdev(slave_dev);
d87d6f44 1200 return ret;
91da11f8
LB		 1201 }
1202
1203 netif_carrier_off(slave_dev);
1204
0071f56e
AL		 1205 ret = dsa_slave_phy_setup(p, slave_dev);
1206 if (ret) {
1207 netdev_err(master, "error %d setting up slave phy\n", ret);
1208 free_netdev(slave_dev);
1209 return ret;
1210 }
1211
d87d6f44 1212 return 0;
91da11f8 1213}
b73adef6 1214
cda5c15b
NA		 1215void dsa_slave_destroy(struct net_device *slave_dev)
1216{
1217 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1218
1219 netif_carrier_off(slave_dev);
1220 if (p->phy)
1221 phy_disconnect(p->phy);
1222 unregister_netdev(slave_dev);
1223 free_netdev(slave_dev);
1224}
1225
b73adef6
FF		 1226static bool dsa_slave_dev_check(struct net_device *dev)
1227{
1228 return dev->netdev_ops == &dsa_slave_netdev_ops;
1229}
1230
1231static int dsa_slave_master_changed(struct net_device *dev)
1232{
1233 struct net_device *master = netdev_master_upper_dev_get(dev);
b06b107a 1234 struct dsa_slave_priv *p = netdev_priv(dev);
b73adef6
FF		 1235 int err = 0;
1236
1237 if (master && master->rtnl_link_ops &&
1238 !strcmp(master->rtnl_link_ops->kind, "bridge"))
1239 err = dsa_slave_bridge_port_join(dev, master);
b06b107a 1240 else if (dsa_port_is_bridged(p))
b73adef6
FF		 1241 err = dsa_slave_bridge_port_leave(dev);
1242
1243 return err;
1244}
1245
1246int dsa_slave_netdevice_event(struct notifier_block *unused,
1247 unsigned long event, void *ptr)
1248{
1249 struct net_device *dev;
1250 int err = 0;
1251
1252 switch (event) {
1253 case NETDEV_CHANGEUPPER:
1254 dev = netdev_notifier_info_to_dev(ptr);
1255 if (!dsa_slave_dev_check(dev))
1256 goto out;
1257
1258 err = dsa_slave_master_changed(dev);
efd29b3d 1259 if (err && err != -EOPNOTSUPP)
b73adef6
FF		 1260 netdev_warn(dev, "failed to reflect master change\n");
1261
1262 break;
1263 }
1264
1265out:
1266 return NOTIFY_DONE;
1267}
Linux kernel - Deliverables
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