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net: dsa: mv88e6xxx: remove port_fdb_getnext
[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,
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;
146a3206
VD		 349 int ret;
350
351 if (!ds->drv->port_fdb_prepare || !ds->drv->port_fdb_add)
352 return -EOPNOTSUPP;
cdf09697 353
79a62eb2 354 if (switchdev_trans_ph_prepare(trans))
146a3206 355 ret = ds->drv->port_fdb_prepare(ds, p->port, fdb, trans);
79a62eb2 356 else
1f36faf2 357 ret = ds->drv->port_fdb_add(ds, p->port, fdb, trans);
cdf09697
DM		 358
359 return ret;
360}
361
ba14d9eb 362static int dsa_slave_port_fdb_del(struct net_device *dev,
52ba57cf 363 const struct switchdev_obj_port_fdb *fdb)
cdf09697
DM		 364{
365 struct dsa_slave_priv *p = netdev_priv(dev);
366 struct dsa_switch *ds = p->parent;
367 int ret = -EOPNOTSUPP;
368
2a778e1b 369 if (ds->drv->port_fdb_del)
8057b3e7 370 ret = ds->drv->port_fdb_del(ds, p->port, fdb);
cdf09697
DM		 371
372 return ret;
373}
374
ba14d9eb 375static int dsa_slave_port_fdb_dump(struct net_device *dev,
52ba57cf 376 struct switchdev_obj_port_fdb *fdb,
648b4a99 377 switchdev_obj_dump_cb_t *cb)
cdf09697
DM		 378{
379 struct dsa_slave_priv *p = netdev_priv(dev);
380 struct dsa_switch *ds = p->parent;
381 unsigned char addr[ETH_ALEN] = { 0 };
2a778e1b 382 u16 vid = 0;
cdf09697
DM		 383 int ret;
384
ea70ba98
VD		 385 if (ds->drv->port_fdb_dump)
386 return ds->drv->port_fdb_dump(ds, p->port, fdb, cb);
387
2a778e1b 388 if (!ds->drv->port_fdb_getnext)
cdf09697
DM		 389 return -EOPNOTSUPP;
390
ba14d9eb 391 for (;;) {
cdf09697
DM		 392 bool is_static;
393
2a778e1b
VD		 394 ret = ds->drv->port_fdb_getnext(ds, p->port, addr, &vid,
395 &is_static);
cdf09697
DM		 396 if (ret < 0)
397 break;
398
850d0cbc 399 ether_addr_copy(fdb->addr, addr);
25f07adc
VD		 400 fdb->vid = vid;
401 fdb->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
cdf09697 402
648b4a99 403 ret = cb(&fdb->obj);
cdf09697
DM		 404 if (ret < 0)
405 break;
406 }
407
ba14d9eb 408 return ret == -ENOENT ? 0 : ret;
cdf09697
DM		 409}
410
91da11f8
LB		 411static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
412{
413 struct dsa_slave_priv *p = netdev_priv(dev);
91da11f8
LB		 414
415 if (p->phy != NULL)
28b04113 416 return phy_mii_ioctl(p->phy, ifr, cmd);
91da11f8
LB		 417
418 return -EOPNOTSUPP;
419}
420
b73adef6
FF		 421/* Return a bitmask of all ports being currently bridged within a given bridge
422 * device. Note that on leave, the mask will still return the bitmask of ports
423 * currently bridged, prior to port removal, and this is exactly what we want.
424 */
425static u32 dsa_slave_br_port_mask(struct dsa_switch *ds,
426 struct net_device *bridge)
427{
428 struct dsa_slave_priv *p;
429 unsigned int port;
430 u32 mask = 0;
431
432 for (port = 0; port < DSA_MAX_PORTS; port++) {
d79d2107 433 if (!dsa_is_port_initialized(ds, port))
b73adef6
FF		 434 continue;
435
436 p = netdev_priv(ds->ports[port]);
437
438 if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT &&
439 p->bridge_dev == bridge)
440 mask |= 1 << port;
441 }
442
443 return mask;
444}
445
446static int dsa_slave_stp_update(struct net_device *dev, u8 state)
447{
448 struct dsa_slave_priv *p = netdev_priv(dev);
449 struct dsa_switch *ds = p->parent;
450 int ret = -EOPNOTSUPP;
451
452 if (ds->drv->port_stp_update)
453 ret = ds->drv->port_stp_update(ds, p->port, state);
454
455 return ret;
456}
457
35636062 458static int dsa_slave_port_attr_set(struct net_device *dev,
f7fadf30 459 const struct switchdev_attr *attr,
7ea6eb3f 460 struct switchdev_trans *trans)
35636062 461{
b8d866ac
VD		 462 struct dsa_slave_priv *p = netdev_priv(dev);
463 struct dsa_switch *ds = p->parent;
464 int ret;
35636062
SF		 465
466 switch (attr->id) {
1f868398 467 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
b8d866ac
VD		 468 if (switchdev_trans_ph_prepare(trans))
469 ret = ds->drv->port_stp_update ? 0 : -EOPNOTSUPP;
470 else
471 ret = ds->drv->port_stp_update(ds, p->port,
472 attr->u.stp_state);
35636062
SF		 473 break;
474 default:
475 ret = -EOPNOTSUPP;
476 break;
477 }
478
479 return ret;
480}
481
ba14d9eb 482static int dsa_slave_port_obj_add(struct net_device *dev,
648b4a99 483 const struct switchdev_obj *obj,
7ea6eb3f 484 struct switchdev_trans *trans)
ba14d9eb
VD		 485{
486 int err;
487
488 /* For the prepare phase, ensure the full set of changes is feasable in
489 * one go in order to signal a failure properly. If an operation is not
490 * supported, return -EOPNOTSUPP.
491 */
492
9e8f4a54 493 switch (obj->id) {
57d80838 494 case SWITCHDEV_OBJ_ID_PORT_FDB:
648b4a99
JP		 495 err = dsa_slave_port_fdb_add(dev,
496 SWITCHDEV_OBJ_PORT_FDB(obj),
497 trans);
ba14d9eb 498 break;
57d80838 499 case SWITCHDEV_OBJ_ID_PORT_VLAN:
648b4a99
JP		 500 err = dsa_slave_port_vlan_add(dev,
501 SWITCHDEV_OBJ_PORT_VLAN(obj),
502 trans);
11149536 503 break;
ba14d9eb
VD		 504 default:
505 err = -EOPNOTSUPP;
506 break;
507 }
508
509 return err;
510}
511
512static int dsa_slave_port_obj_del(struct net_device *dev,
648b4a99 513 const struct switchdev_obj *obj)
ba14d9eb
VD		 514{
515 int err;
516
9e8f4a54 517 switch (obj->id) {
57d80838 518 case SWITCHDEV_OBJ_ID_PORT_FDB:
648b4a99
JP		 519 err = dsa_slave_port_fdb_del(dev,
520 SWITCHDEV_OBJ_PORT_FDB(obj));
ba14d9eb 521 break;
57d80838 522 case SWITCHDEV_OBJ_ID_PORT_VLAN:
648b4a99
JP		 523 err = dsa_slave_port_vlan_del(dev,
524 SWITCHDEV_OBJ_PORT_VLAN(obj));
11149536 525 break;
ba14d9eb
VD		 526 default:
527 err = -EOPNOTSUPP;
528 break;
529 }
530
531 return err;
532}
533
534static int dsa_slave_port_obj_dump(struct net_device *dev,
648b4a99
JP		 535 struct switchdev_obj *obj,
536 switchdev_obj_dump_cb_t *cb)
ba14d9eb
VD		 537{
538 int err;
539
9e8f4a54 540 switch (obj->id) {
57d80838 541 case SWITCHDEV_OBJ_ID_PORT_FDB:
648b4a99
JP		 542 err = dsa_slave_port_fdb_dump(dev,
543 SWITCHDEV_OBJ_PORT_FDB(obj),
544 cb);
ba14d9eb 545 break;
57d80838 546 case SWITCHDEV_OBJ_ID_PORT_VLAN:
648b4a99
JP		 547 err = dsa_slave_port_vlan_dump(dev,
548 SWITCHDEV_OBJ_PORT_VLAN(obj),
549 cb);
11149536 550 break;
ba14d9eb
VD		 551 default:
552 err = -EOPNOTSUPP;
553 break;
554 }
555
556 return err;
557}
558
b73adef6
FF		 559static int dsa_slave_bridge_port_join(struct net_device *dev,
560 struct net_device *br)
561{
562 struct dsa_slave_priv *p = netdev_priv(dev);
563 struct dsa_switch *ds = p->parent;
564 int ret = -EOPNOTSUPP;
565
566 p->bridge_dev = br;
567
568 if (ds->drv->port_join_bridge)
569 ret = ds->drv->port_join_bridge(ds, p->port,
570 dsa_slave_br_port_mask(ds, br));
571
572 return ret;
573}
574
575static int dsa_slave_bridge_port_leave(struct net_device *dev)
576{
577 struct dsa_slave_priv *p = netdev_priv(dev);
578 struct dsa_switch *ds = p->parent;
579 int ret = -EOPNOTSUPP;
580
581
582 if (ds->drv->port_leave_bridge)
583 ret = ds->drv->port_leave_bridge(ds, p->port,
584 dsa_slave_br_port_mask(ds, p->bridge_dev));
585
586 p->bridge_dev = NULL;
587
588 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
589 * so allow it to be in BR_STATE_FORWARDING to be kept functional
590 */
591 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
592
593 return ret;
594}
595
f8e20a9f
SF		 596static int dsa_slave_port_attr_get(struct net_device *dev,
597 struct switchdev_attr *attr)
b73adef6
FF		 598{
599 struct dsa_slave_priv *p = netdev_priv(dev);
600 struct dsa_switch *ds = p->parent;
601
f8e20a9f 602 switch (attr->id) {
1f868398 603 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
42275bd8
SF		 604 attr->u.ppid.id_len = sizeof(ds->index);
605 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
f8e20a9f
SF		 606 break;
607 default:
608 return -EOPNOTSUPP;
609 }
b73adef6
FF		 610
611 return 0;
612}
613
04ff53f9
FF		 614static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
615 struct sk_buff *skb)
616{
617#ifdef CONFIG_NET_POLL_CONTROLLER
618 if (p->netpoll)
619 netpoll_send_skb(p->netpoll, skb);
620#else
621 BUG();
622#endif
623 return NETDEV_TX_OK;
624}
625
3e8a72d1
FF		 626static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
627{
628 struct dsa_slave_priv *p = netdev_priv(dev);
4ed70ce9 629 struct sk_buff *nskb;
3e8a72d1 630
4ed70ce9
FF		 631 dev->stats.tx_packets++;
632 dev->stats.tx_bytes += skb->len;
3e8a72d1 633
4ed70ce9
FF		 634 /* Transmit function may have to reallocate the original SKB */
635 nskb = p->xmit(skb, dev);
636 if (!nskb)
637 return NETDEV_TX_OK;
5aed85ce 638
04ff53f9
FF		 639 /* SKB for netpoll still need to be mangled with the protocol-specific
640 * tag to be successfully transmitted
641 */
642 if (unlikely(netpoll_tx_running(dev)))
643 return dsa_netpoll_send_skb(p, nskb);
644
4ed70ce9
FF		 645 /* Queue the SKB for transmission on the parent interface, but
646 * do not modify its EtherType
647 */
648 nskb->dev = p->parent->dst->master_netdev;
649 dev_queue_xmit(nskb);
5aed85ce
FF		 650
651 return NETDEV_TX_OK;
652}
653
4ed70ce9
FF		 654static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
655 struct net_device *dev)
656{
657 /* Just return the original SKB */
658 return skb;
659}
660
91da11f8
LB		 661
662/* ethtool operations *******************************************************/
663static int
664dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
665{
666 struct dsa_slave_priv *p = netdev_priv(dev);
667 int err;
668
669 err = -EOPNOTSUPP;
670 if (p->phy != NULL) {
671 err = phy_read_status(p->phy);
672 if (err == 0)
673 err = phy_ethtool_gset(p->phy, cmd);
674 }
675
676 return err;
677}
678
679static int
680dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
681{
682 struct dsa_slave_priv *p = netdev_priv(dev);
683
684 if (p->phy != NULL)
685 return phy_ethtool_sset(p->phy, cmd);
686
687 return -EOPNOTSUPP;
688}
689
690static void dsa_slave_get_drvinfo(struct net_device *dev,
691 struct ethtool_drvinfo *drvinfo)
692{
7826d43f
JP		 693 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
694 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
695 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
696 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
91da11f8
LB		 697}
698
3d762a0f
GR		 699static int dsa_slave_get_regs_len(struct net_device *dev)
700{
701 struct dsa_slave_priv *p = netdev_priv(dev);
702 struct dsa_switch *ds = p->parent;
703
704 if (ds->drv->get_regs_len)
705 return ds->drv->get_regs_len(ds, p->port);
706
707 return -EOPNOTSUPP;
708}
709
710static void
711dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
712{
713 struct dsa_slave_priv *p = netdev_priv(dev);
714 struct dsa_switch *ds = p->parent;
715
716 if (ds->drv->get_regs)
717 ds->drv->get_regs(ds, p->port, regs, _p);
718}
719
91da11f8
LB		 720static int dsa_slave_nway_reset(struct net_device *dev)
721{
722 struct dsa_slave_priv *p = netdev_priv(dev);
723
724 if (p->phy != NULL)
725 return genphy_restart_aneg(p->phy);
726
727 return -EOPNOTSUPP;
728}
729
730static u32 dsa_slave_get_link(struct net_device *dev)
731{
732 struct dsa_slave_priv *p = netdev_priv(dev);
733
734 if (p->phy != NULL) {
735 genphy_update_link(p->phy);
736 return p->phy->link;
737 }
738
739 return -EOPNOTSUPP;
740}
741
6793abb4
GR		 742static int dsa_slave_get_eeprom_len(struct net_device *dev)
743{
744 struct dsa_slave_priv *p = netdev_priv(dev);
745 struct dsa_switch *ds = p->parent;
746
747 if (ds->pd->eeprom_len)
748 return ds->pd->eeprom_len;
749
750 if (ds->drv->get_eeprom_len)
751 return ds->drv->get_eeprom_len(ds);
752
753 return 0;
754}
755
756static int dsa_slave_get_eeprom(struct net_device *dev,
757 struct ethtool_eeprom *eeprom, u8 *data)
758{
759 struct dsa_slave_priv *p = netdev_priv(dev);
760 struct dsa_switch *ds = p->parent;
761
762 if (ds->drv->get_eeprom)
763 return ds->drv->get_eeprom(ds, eeprom, data);
764
765 return -EOPNOTSUPP;
766}
767
768static int dsa_slave_set_eeprom(struct net_device *dev,
769 struct ethtool_eeprom *eeprom, u8 *data)
770{
771 struct dsa_slave_priv *p = netdev_priv(dev);
772 struct dsa_switch *ds = p->parent;
773
774 if (ds->drv->set_eeprom)
775 return ds->drv->set_eeprom(ds, eeprom, data);
776
777 return -EOPNOTSUPP;
778}
779
91da11f8
LB		 780static void dsa_slave_get_strings(struct net_device *dev,
781 uint32_t stringset, uint8_t *data)
782{
783 struct dsa_slave_priv *p = netdev_priv(dev);
784 struct dsa_switch *ds = p->parent;
785
786 if (stringset == ETH_SS_STATS) {
787 int len = ETH_GSTRING_LEN;
788
789 strncpy(data, "tx_packets", len);
790 strncpy(data + len, "tx_bytes", len);
791 strncpy(data + 2 * len, "rx_packets", len);
792 strncpy(data + 3 * len, "rx_bytes", len);
793 if (ds->drv->get_strings != NULL)
794 ds->drv->get_strings(ds, p->port, data + 4 * len);
795 }
796}
797
798static void dsa_slave_get_ethtool_stats(struct net_device *dev,
799 struct ethtool_stats *stats,
800 uint64_t *data)
801{
802 struct dsa_slave_priv *p = netdev_priv(dev);
803 struct dsa_switch *ds = p->parent;
804
805 data[0] = p->dev->stats.tx_packets;
806 data[1] = p->dev->stats.tx_bytes;
807 data[2] = p->dev->stats.rx_packets;
808 data[3] = p->dev->stats.rx_bytes;
809 if (ds->drv->get_ethtool_stats != NULL)
810 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
811}
812
813static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
814{
815 struct dsa_slave_priv *p = netdev_priv(dev);
816 struct dsa_switch *ds = p->parent;
817
818 if (sset == ETH_SS_STATS) {
819 int count;
820
821 count = 4;
822 if (ds->drv->get_sset_count != NULL)
823 count += ds->drv->get_sset_count(ds);
824
825 return count;
826 }
827
828 return -EOPNOTSUPP;
829}
830
19e57c4e
FF		 831static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
832{
833 struct dsa_slave_priv *p = netdev_priv(dev);
834 struct dsa_switch *ds = p->parent;
835
836 if (ds->drv->get_wol)
837 ds->drv->get_wol(ds, p->port, w);
838}
839
840static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
841{
842 struct dsa_slave_priv *p = netdev_priv(dev);
843 struct dsa_switch *ds = p->parent;
844 int ret = -EOPNOTSUPP;
845
846 if (ds->drv->set_wol)
847 ret = ds->drv->set_wol(ds, p->port, w);
848
849 return ret;
850}
851
7905288f
FF		 852static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
853{
854 struct dsa_slave_priv *p = netdev_priv(dev);
855 struct dsa_switch *ds = p->parent;
856 int ret;
857
858 if (!ds->drv->set_eee)
859 return -EOPNOTSUPP;
860
861 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
862 if (ret)
863 return ret;
864
865 if (p->phy)
866 ret = phy_ethtool_set_eee(p->phy, e);
867
868 return ret;
869}
870
871static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
872{
873 struct dsa_slave_priv *p = netdev_priv(dev);
874 struct dsa_switch *ds = p->parent;
875 int ret;
876
877 if (!ds->drv->get_eee)
878 return -EOPNOTSUPP;
879
880 ret = ds->drv->get_eee(ds, p->port, e);
881 if (ret)
882 return ret;
883
884 if (p->phy)
885 ret = phy_ethtool_get_eee(p->phy, e);
886
887 return ret;
888}
889
04ff53f9
FF		 890#ifdef CONFIG_NET_POLL_CONTROLLER
891static int dsa_slave_netpoll_setup(struct net_device *dev,
892 struct netpoll_info *ni)
893{
894 struct dsa_slave_priv *p = netdev_priv(dev);
895 struct dsa_switch *ds = p->parent;
896 struct net_device *master = ds->dst->master_netdev;
897 struct netpoll *netpoll;
898 int err = 0;
899
900 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
901 if (!netpoll)
902 return -ENOMEM;
903
904 err = __netpoll_setup(netpoll, master);
905 if (err) {
906 kfree(netpoll);
907 goto out;
908 }
909
910 p->netpoll = netpoll;
911out:
912 return err;
913}
914
915static void dsa_slave_netpoll_cleanup(struct net_device *dev)
916{
917 struct dsa_slave_priv *p = netdev_priv(dev);
918 struct netpoll *netpoll = p->netpoll;
919
920 if (!netpoll)
921 return;
922
923 p->netpoll = NULL;
924
925 __netpoll_free_async(netpoll);
926}
927
928static void dsa_slave_poll_controller(struct net_device *dev)
929{
930}
931#endif
932
91da11f8
LB		 933static const struct ethtool_ops dsa_slave_ethtool_ops = {
934 .get_settings = dsa_slave_get_settings,
935 .set_settings = dsa_slave_set_settings,
936 .get_drvinfo = dsa_slave_get_drvinfo,
3d762a0f
GR		 937 .get_regs_len = dsa_slave_get_regs_len,
938 .get_regs = dsa_slave_get_regs,
91da11f8
LB		 939 .nway_reset = dsa_slave_nway_reset,
940 .get_link = dsa_slave_get_link,
6793abb4
GR		 941 .get_eeprom_len = dsa_slave_get_eeprom_len,
942 .get_eeprom = dsa_slave_get_eeprom,
943 .set_eeprom = dsa_slave_set_eeprom,
91da11f8
LB		 944 .get_strings = dsa_slave_get_strings,
945 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
946 .get_sset_count = dsa_slave_get_sset_count,
19e57c4e
FF		 947 .set_wol = dsa_slave_set_wol,
948 .get_wol = dsa_slave_get_wol,
7905288f
FF		 949 .set_eee = dsa_slave_set_eee,
950 .get_eee = dsa_slave_get_eee,
91da11f8
LB		 951};
952
3e8a72d1 953static const struct net_device_ops dsa_slave_netdev_ops = {
d442ad4a
SH		 954 .ndo_open = dsa_slave_open,
955 .ndo_stop = dsa_slave_close,
3e8a72d1 956 .ndo_start_xmit = dsa_slave_xmit,
d442ad4a
SH		 957 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
958 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
d442ad4a 959 .ndo_set_mac_address = dsa_slave_set_mac_address,
ba14d9eb
VD		 960 .ndo_fdb_add = switchdev_port_fdb_add,
961 .ndo_fdb_del = switchdev_port_fdb_del,
962 .ndo_fdb_dump = switchdev_port_fdb_dump,
d442ad4a 963 .ndo_do_ioctl = dsa_slave_ioctl,
abd2be00 964 .ndo_get_iflink = dsa_slave_get_iflink,
04ff53f9
FF		 965#ifdef CONFIG_NET_POLL_CONTROLLER
966 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
967 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
968 .ndo_poll_controller = dsa_slave_poll_controller,
969#endif
11149536
VD		 970 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
971 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
972 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
98237d43
SF		 973};
974
9d47c0a2 975static const struct switchdev_ops dsa_slave_switchdev_ops = {
f8e20a9f 976 .switchdev_port_attr_get = dsa_slave_port_attr_get,
35636062 977 .switchdev_port_attr_set = dsa_slave_port_attr_set,
ba14d9eb
VD		 978 .switchdev_port_obj_add = dsa_slave_port_obj_add,
979 .switchdev_port_obj_del = dsa_slave_port_obj_del,
980 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
d442ad4a 981};
91da11f8 982
f37db85d
FF		 983static struct device_type dsa_type = {
984 .name = "dsa",
985};
986
0d8bcdd3
FF		 987static void dsa_slave_adjust_link(struct net_device *dev)
988{
989 struct dsa_slave_priv *p = netdev_priv(dev);
ec9436ba 990 struct dsa_switch *ds = p->parent;
0d8bcdd3
FF		 991 unsigned int status_changed = 0;
992
993 if (p->old_link != p->phy->link) {
994 status_changed = 1;
995 p->old_link = p->phy->link;
996 }
997
998 if (p->old_duplex != p->phy->duplex) {
999 status_changed = 1;
1000 p->old_duplex = p->phy->duplex;
1001 }
1002
1003 if (p->old_pause != p->phy->pause) {
1004 status_changed = 1;
1005 p->old_pause = p->phy->pause;
1006 }
1007
ec9436ba
FF		 1008 if (ds->drv->adjust_link && status_changed)
1009 ds->drv->adjust_link(ds, p->port, p->phy);
1010
0d8bcdd3
FF		 1011 if (status_changed)
1012 phy_print_status(p->phy);
1013}
1014
ce31b31c
FF		 1015static int dsa_slave_fixed_link_update(struct net_device *dev,
1016 struct fixed_phy_status *status)
1017{
1018 struct dsa_slave_priv *p = netdev_priv(dev);
1019 struct dsa_switch *ds = p->parent;
1020
1021 if (ds->drv->fixed_link_update)
1022 ds->drv->fixed_link_update(ds, p->port, status);
1023
1024 return 0;
1025}
1026
91da11f8 1027/* slave device setup *******************************************************/
c305c165 1028static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
cd28a1a9
FF		 1029 struct net_device *slave_dev,
1030 int addr)
c305c165
FF		 1031{
1032 struct dsa_switch *ds = p->parent;
1033
cd28a1a9 1034 p->phy = ds->slave_mii_bus->phy_map[addr];
d25b8e74
RK		 1035 if (!p->phy) {
1036 netdev_err(slave_dev, "no phy at %d\n", addr);
c305c165 1037 return -ENODEV;
d25b8e74 1038 }
c305c165
FF		 1039
1040 /* Use already configured phy mode */
211c504a
FF		 1041 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1042 p->phy_interface = p->phy->interface;
c305c165
FF		 1043 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
1044 p->phy_interface);
1045
1046 return 0;
1047}
1048
9697f1cd 1049static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
0d8bcdd3
FF		 1050 struct net_device *slave_dev)
1051{
1052 struct dsa_switch *ds = p->parent;
1053 struct dsa_chip_data *cd = ds->pd;
1054 struct device_node *phy_dn, *port_dn;
ce31b31c 1055 bool phy_is_fixed = false;
6819563e 1056 u32 phy_flags = 0;
19334920 1057 int mode, ret;
0d8bcdd3
FF		 1058
1059 port_dn = cd->port_dn[p->port];
19334920
GR		 1060 mode = of_get_phy_mode(port_dn);
1061 if (mode < 0)
1062 mode = PHY_INTERFACE_MODE_NA;
1063 p->phy_interface = mode;
0d8bcdd3
FF		 1064
1065 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1066 if (of_phy_is_fixed_link(port_dn)) {
1067 /* In the case of a fixed PHY, the DT node associated
1068 * to the fixed PHY is the Port DT node
1069 */
1070 ret = of_phy_register_fixed_link(port_dn);
1071 if (ret) {
d25b8e74 1072 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
9697f1cd 1073 return ret;
0d8bcdd3 1074 }
ce31b31c 1075 phy_is_fixed = true;
0d8bcdd3
FF		 1076 phy_dn = port_dn;
1077 }
1078
6819563e
FF		 1079 if (ds->drv->get_phy_flags)
1080 phy_flags = ds->drv->get_phy_flags(ds, p->port);
1081
cd28a1a9 1082 if (phy_dn) {
d25b8e74
RK		 1083 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
1084
cd28a1a9
FF		 1085 /* If this PHY address is part of phys_mii_mask, which means
1086 * that we need to divert reads and writes to/from it, then we
1087 * want to bind this device using the slave MII bus created by
1088 * DSA to make that happen.
1089 */
d25b8e74
RK		 1090 if (!phy_is_fixed && phy_id >= 0 &&
1091 (ds->phys_mii_mask & (1 << phy_id))) {
1092 ret = dsa_slave_phy_connect(p, slave_dev, phy_id);
1093 if (ret) {
1094 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret);
cd28a1a9 1095 return ret;
d25b8e74 1096 }
cd28a1a9
FF		 1097 } else {
1098 p->phy = of_phy_connect(slave_dev, phy_dn,
1099 dsa_slave_adjust_link,
1100 phy_flags,
1101 p->phy_interface);
1102 }
1103 }
0d8bcdd3 1104
ce31b31c
FF		 1105 if (p->phy && phy_is_fixed)
1106 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
1107
0d8bcdd3
FF		 1108 /* We could not connect to a designated PHY, so use the switch internal
1109 * MDIO bus instead
1110 */
b31f65fb 1111 if (!p->phy) {
cd28a1a9 1112 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
d25b8e74
RK		 1113 if (ret) {
1114 netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret);
c305c165 1115 return ret;
d25b8e74 1116 }
b31f65fb 1117 } else {
a2ae6007
JP		 1118 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
1119 p->phy->addr, p->phy->drv->name);
b31f65fb 1120 }
9697f1cd
FF		 1121
1122 return 0;
0d8bcdd3
FF		 1123}
1124
448b4482
AL		 1125static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1126static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1127 struct netdev_queue *txq,
1128 void *_unused)
1129{
1130 lockdep_set_class(&txq->_xmit_lock,
1131 &dsa_slave_netdev_xmit_lock_key);
1132}
1133
24462549
FF		 1134int dsa_slave_suspend(struct net_device *slave_dev)
1135{
1136 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1137
24462549
FF		 1138 if (p->phy) {
1139 phy_stop(p->phy);
1140 p->old_pause = -1;
1141 p->old_link = -1;
1142 p->old_duplex = -1;
1143 phy_suspend(p->phy);
1144 }
1145
1146 return 0;
1147}
1148
1149int dsa_slave_resume(struct net_device *slave_dev)
1150{
1151 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1152
1153 netif_device_attach(slave_dev);
1154
1155 if (p->phy) {
1156 phy_resume(p->phy);
1157 phy_start(p->phy);
1158 }
1159
1160 return 0;
1161}
1162
d87d6f44
GR		 1163int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1164 int port, char *name)
91da11f8 1165{
e84665c9 1166 struct net_device *master = ds->dst->master_netdev;
91da11f8
LB		 1167 struct net_device *slave_dev;
1168 struct dsa_slave_priv *p;
1169 int ret;
1170
c835a677
TG		 1171 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1172 NET_NAME_UNKNOWN, ether_setup);
91da11f8 1173 if (slave_dev == NULL)
d87d6f44 1174 return -ENOMEM;
91da11f8
LB		 1175
1176 slave_dev->features = master->vlan_features;
7ad24ea4 1177 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
2fcc8005 1178 eth_hw_addr_inherit(slave_dev, master);
0a5f107b 1179 slave_dev->priv_flags |= IFF_NO_QUEUE;
3e8a72d1 1180 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
9d47c0a2 1181 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
f37db85d 1182 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
d442ad4a 1183
448b4482
AL		 1184 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1185 NULL);
1186
5075314e
AD		 1187 SET_NETDEV_DEV(slave_dev, parent);
1188 slave_dev->dev.of_node = ds->pd->port_dn[port];
1189 slave_dev->vlan_features = master->vlan_features;
1190
1191 p = netdev_priv(slave_dev);
1192 p->dev = slave_dev;
1193 p->parent = ds;
1194 p->port = port;
1195
e84665c9 1196 switch (ds->dst->tag_protocol) {
cf85d08f 1197#ifdef CONFIG_NET_DSA_TAG_DSA
ac7a04c3 1198 case DSA_TAG_PROTO_DSA:
5075314e 1199 p->xmit = dsa_netdev_ops.xmit;
cf85d08f
LB		 1200 break;
1201#endif
91da11f8 1202#ifdef CONFIG_NET_DSA_TAG_EDSA
ac7a04c3 1203 case DSA_TAG_PROTO_EDSA:
5075314e 1204 p->xmit = edsa_netdev_ops.xmit;
91da11f8 1205 break;
396138f0
LB		 1206#endif
1207#ifdef CONFIG_NET_DSA_TAG_TRAILER
ac7a04c3 1208 case DSA_TAG_PROTO_TRAILER:
5075314e 1209 p->xmit = trailer_netdev_ops.xmit;
396138f0 1210 break;
5037d532
FF		 1211#endif
1212#ifdef CONFIG_NET_DSA_TAG_BRCM
ac7a04c3 1213 case DSA_TAG_PROTO_BRCM:
5075314e 1214 p->xmit = brcm_netdev_ops.xmit;
5037d532 1215 break;
91da11f8
LB		 1216#endif
1217 default:
5075314e 1218 p->xmit = dsa_slave_notag_xmit;
5aed85ce 1219 break;
91da11f8 1220 }
d442ad4a 1221
0d8bcdd3
FF		 1222 p->old_pause = -1;
1223 p->old_link = -1;
1224 p->old_duplex = -1;
1225
9697f1cd
FF		 1226 ret = dsa_slave_phy_setup(p, slave_dev);
1227 if (ret) {
d25b8e74 1228 netdev_err(master, "error %d setting up slave phy\n", ret);
9697f1cd 1229 free_netdev(slave_dev);
d87d6f44 1230 return ret;
9697f1cd 1231 }
91da11f8 1232
d87d6f44 1233 ds->ports[port] = slave_dev;
91da11f8
LB		 1234 ret = register_netdev(slave_dev);
1235 if (ret) {
a2ae6007
JP		 1236 netdev_err(master, "error %d registering interface %s\n",
1237 ret, slave_dev->name);
9697f1cd 1238 phy_disconnect(p->phy);
d87d6f44 1239 ds->ports[port] = NULL;
91da11f8 1240 free_netdev(slave_dev);
d87d6f44 1241 return ret;
91da11f8
LB		 1242 }
1243
1244 netif_carrier_off(slave_dev);
1245
d87d6f44 1246 return 0;
91da11f8 1247}
b73adef6
FF		 1248
1249static bool dsa_slave_dev_check(struct net_device *dev)
1250{
1251 return dev->netdev_ops == &dsa_slave_netdev_ops;
1252}
1253
1254static int dsa_slave_master_changed(struct net_device *dev)
1255{
1256 struct net_device *master = netdev_master_upper_dev_get(dev);
b06b107a 1257 struct dsa_slave_priv *p = netdev_priv(dev);
b73adef6
FF		 1258 int err = 0;
1259
1260 if (master && master->rtnl_link_ops &&
1261 !strcmp(master->rtnl_link_ops->kind, "bridge"))
1262 err = dsa_slave_bridge_port_join(dev, master);
b06b107a 1263 else if (dsa_port_is_bridged(p))
b73adef6
FF		 1264 err = dsa_slave_bridge_port_leave(dev);
1265
1266 return err;
1267}
1268
1269int dsa_slave_netdevice_event(struct notifier_block *unused,
1270 unsigned long event, void *ptr)
1271{
1272 struct net_device *dev;
1273 int err = 0;
1274
1275 switch (event) {
1276 case NETDEV_CHANGEUPPER:
1277 dev = netdev_notifier_info_to_dev(ptr);
1278 if (!dsa_slave_dev_check(dev))
1279 goto out;
1280
1281 err = dsa_slave_master_changed(dev);
efd29b3d 1282 if (err && err != -EOPNOTSUPP)
b73adef6
FF		 1283 netdev_warn(dev, "failed to reflect master change\n");
1284
1285 break;
1286 }
1287
1288out:
1289 return NOTIFY_DONE;
1290}
Linux kernel - Deliverables
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