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switchdev: introduce transaction item queue for attr_set and obj_add
[linux-2.6-block.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,
245 struct switchdev_obj *obj)
246{
247 struct switchdev_obj_vlan *vlan = &obj->u.vlan;
248 struct dsa_slave_priv *p = netdev_priv(dev);
249 struct dsa_switch *ds = p->parent;
250 u16 vid;
251 int err;
252
69f5df49 253 switch (obj->trans_ph) {
11149536
VD		 254 case SWITCHDEV_TRANS_PREPARE:
255 if (!ds->drv->port_vlan_add || !ds->drv->port_pvid_set)
256 return -EOPNOTSUPP;
257
258 /* If the requested port doesn't belong to the same bridge as
259 * the VLAN members, fallback to software VLAN (hopefully).
260 */
261 err = dsa_bridge_check_vlan_range(ds, p->bridge_dev,
262 vlan->vid_begin,
263 vlan->vid_end);
264 if (err)
265 return err;
266 break;
267 case SWITCHDEV_TRANS_COMMIT:
268 for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
269 err = ds->drv->port_vlan_add(ds, p->port, vid,
270 vlan->flags &
271 BRIDGE_VLAN_INFO_UNTAGGED);
272 if (!err && vlan->flags & BRIDGE_VLAN_INFO_PVID)
273 err = ds->drv->port_pvid_set(ds, p->port, vid);
274 if (err)
275 return err;
276 }
277 break;
278 default:
279 return -EOPNOTSUPP;
280 }
281
282 return 0;
283}
284
285static int dsa_slave_port_vlan_del(struct net_device *dev,
286 struct switchdev_obj *obj)
287{
288 struct switchdev_obj_vlan *vlan = &obj->u.vlan;
289 struct dsa_slave_priv *p = netdev_priv(dev);
290 struct dsa_switch *ds = p->parent;
291 u16 vid;
292 int err;
293
294 if (!ds->drv->port_vlan_del)
295 return -EOPNOTSUPP;
296
297 for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
298 err = ds->drv->port_vlan_del(ds, p->port, vid);
299 if (err)
300 return err;
301 }
302
303 return 0;
304}
305
306static int dsa_slave_port_vlan_dump(struct net_device *dev,
307 struct switchdev_obj *obj)
308{
309 struct switchdev_obj_vlan *vlan = &obj->u.vlan;
310 struct dsa_slave_priv *p = netdev_priv(dev);
311 struct dsa_switch *ds = p->parent;
312 DECLARE_BITMAP(members, DSA_MAX_PORTS);
313 DECLARE_BITMAP(untagged, DSA_MAX_PORTS);
314 u16 pvid, vid = 0;
315 int err;
316
317 if (!ds->drv->vlan_getnext || !ds->drv->port_pvid_get)
318 return -EOPNOTSUPP;
319
320 err = ds->drv->port_pvid_get(ds, p->port, &pvid);
321 if (err)
322 return err;
323
324 for (;;) {
325 err = ds->drv->vlan_getnext(ds, &vid, members, untagged);
326 if (err)
327 break;
328
329 if (!test_bit(p->port, members))
330 continue;
331
332 memset(vlan, 0, sizeof(*vlan));
333 vlan->vid_begin = vlan->vid_end = vid;
334
335 if (vid == pvid)
336 vlan->flags |= BRIDGE_VLAN_INFO_PVID;
337
338 if (test_bit(p->port, untagged))
339 vlan->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
340
341 err = obj->cb(dev, obj);
342 if (err)
343 break;
344 }
345
346 return err == -ENOENT ? 0 : err;
347}
348
ba14d9eb
VD		 349static int dsa_slave_port_fdb_add(struct net_device *dev,
350 struct switchdev_obj *obj)
cdf09697 351{
ba14d9eb 352 struct switchdev_obj_fdb *fdb = &obj->u.fdb;
cdf09697
DM		 353 struct dsa_slave_priv *p = netdev_priv(dev);
354 struct dsa_switch *ds = p->parent;
355 int ret = -EOPNOTSUPP;
356
69f5df49 357 if (obj->trans_ph == SWITCHDEV_TRANS_PREPARE)
ba14d9eb 358 ret = ds->drv->port_fdb_add ? 0 : -EOPNOTSUPP;
69f5df49 359 else if (obj->trans_ph == SWITCHDEV_TRANS_COMMIT)
ba14d9eb 360 ret = ds->drv->port_fdb_add(ds, p->port, fdb->addr, fdb->vid);
cdf09697
DM		 361
362 return ret;
363}
364
ba14d9eb
VD		 365static int dsa_slave_port_fdb_del(struct net_device *dev,
366 struct switchdev_obj *obj)
cdf09697 367{
ba14d9eb 368 struct switchdev_obj_fdb *fdb = &obj->u.fdb;
cdf09697
DM		 369 struct dsa_slave_priv *p = netdev_priv(dev);
370 struct dsa_switch *ds = p->parent;
371 int ret = -EOPNOTSUPP;
372
2a778e1b 373 if (ds->drv->port_fdb_del)
ba14d9eb 374 ret = ds->drv->port_fdb_del(ds, p->port, fdb->addr, fdb->vid);
cdf09697
DM		 375
376 return ret;
377}
378
ba14d9eb
VD		 379static int dsa_slave_port_fdb_dump(struct net_device *dev,
380 struct switchdev_obj *obj)
cdf09697
DM		 381{
382 struct dsa_slave_priv *p = netdev_priv(dev);
383 struct dsa_switch *ds = p->parent;
384 unsigned char addr[ETH_ALEN] = { 0 };
2a778e1b 385 u16 vid = 0;
cdf09697
DM		 386 int ret;
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
ba14d9eb
VD		 399 obj->u.fdb.addr = addr;
400 obj->u.fdb.vid = vid;
401 obj->u.fdb.ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
cdf09697 402
ba14d9eb 403 ret = obj->cb(dev, 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,
7ea6eb3f
JP		 459 struct switchdev_attr *attr,
460 struct switchdev_trans *trans)
35636062
SF		 461{
462 int ret = 0;
463
464 switch (attr->id) {
465 case SWITCHDEV_ATTR_PORT_STP_STATE:
69f5df49 466 if (attr->trans_ph == SWITCHDEV_TRANS_COMMIT)
42275bd8 467 ret = dsa_slave_stp_update(dev, attr->u.stp_state);
35636062
SF		 468 break;
469 default:
470 ret = -EOPNOTSUPP;
471 break;
472 }
473
474 return ret;
475}
476
ba14d9eb 477static int dsa_slave_port_obj_add(struct net_device *dev,
7ea6eb3f
JP		 478 struct switchdev_obj *obj,
479 struct switchdev_trans *trans)
ba14d9eb
VD		 480{
481 int err;
482
483 /* For the prepare phase, ensure the full set of changes is feasable in
484 * one go in order to signal a failure properly. If an operation is not
485 * supported, return -EOPNOTSUPP.
486 */
487
488 switch (obj->id) {
489 case SWITCHDEV_OBJ_PORT_FDB:
490 err = dsa_slave_port_fdb_add(dev, obj);
491 break;
11149536
VD		 492 case SWITCHDEV_OBJ_PORT_VLAN:
493 err = dsa_slave_port_vlan_add(dev, obj);
494 break;
ba14d9eb
VD		 495 default:
496 err = -EOPNOTSUPP;
497 break;
498 }
499
500 return err;
501}
502
503static int dsa_slave_port_obj_del(struct net_device *dev,
504 struct switchdev_obj *obj)
505{
506 int err;
507
508 switch (obj->id) {
509 case SWITCHDEV_OBJ_PORT_FDB:
510 err = dsa_slave_port_fdb_del(dev, obj);
511 break;
11149536
VD		 512 case SWITCHDEV_OBJ_PORT_VLAN:
513 err = dsa_slave_port_vlan_del(dev, obj);
514 break;
ba14d9eb
VD		 515 default:
516 err = -EOPNOTSUPP;
517 break;
518 }
519
520 return err;
521}
522
523static int dsa_slave_port_obj_dump(struct net_device *dev,
524 struct switchdev_obj *obj)
525{
526 int err;
527
528 switch (obj->id) {
529 case SWITCHDEV_OBJ_PORT_FDB:
530 err = dsa_slave_port_fdb_dump(dev, obj);
531 break;
11149536
VD		 532 case SWITCHDEV_OBJ_PORT_VLAN:
533 err = dsa_slave_port_vlan_dump(dev, obj);
534 break;
ba14d9eb
VD		 535 default:
536 err = -EOPNOTSUPP;
537 break;
538 }
539
540 return err;
541}
542
b73adef6
FF		 543static int dsa_slave_bridge_port_join(struct net_device *dev,
544 struct net_device *br)
545{
546 struct dsa_slave_priv *p = netdev_priv(dev);
547 struct dsa_switch *ds = p->parent;
548 int ret = -EOPNOTSUPP;
549
550 p->bridge_dev = br;
551
552 if (ds->drv->port_join_bridge)
553 ret = ds->drv->port_join_bridge(ds, p->port,
554 dsa_slave_br_port_mask(ds, br));
555
556 return ret;
557}
558
559static int dsa_slave_bridge_port_leave(struct net_device *dev)
560{
561 struct dsa_slave_priv *p = netdev_priv(dev);
562 struct dsa_switch *ds = p->parent;
563 int ret = -EOPNOTSUPP;
564
565
566 if (ds->drv->port_leave_bridge)
567 ret = ds->drv->port_leave_bridge(ds, p->port,
568 dsa_slave_br_port_mask(ds, p->bridge_dev));
569
570 p->bridge_dev = NULL;
571
572 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
573 * so allow it to be in BR_STATE_FORWARDING to be kept functional
574 */
575 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
576
577 return ret;
578}
579
f8e20a9f
SF		 580static int dsa_slave_port_attr_get(struct net_device *dev,
581 struct switchdev_attr *attr)
b73adef6
FF		 582{
583 struct dsa_slave_priv *p = netdev_priv(dev);
584 struct dsa_switch *ds = p->parent;
585
f8e20a9f
SF		 586 switch (attr->id) {
587 case SWITCHDEV_ATTR_PORT_PARENT_ID:
42275bd8
SF		 588 attr->u.ppid.id_len = sizeof(ds->index);
589 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
f8e20a9f
SF		 590 break;
591 default:
592 return -EOPNOTSUPP;
593 }
b73adef6
FF		 594
595 return 0;
596}
597
04ff53f9
FF		 598static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
599 struct sk_buff *skb)
600{
601#ifdef CONFIG_NET_POLL_CONTROLLER
602 if (p->netpoll)
603 netpoll_send_skb(p->netpoll, skb);
604#else
605 BUG();
606#endif
607 return NETDEV_TX_OK;
608}
609
3e8a72d1
FF		 610static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
611{
612 struct dsa_slave_priv *p = netdev_priv(dev);
4ed70ce9 613 struct sk_buff *nskb;
3e8a72d1 614
4ed70ce9
FF		 615 dev->stats.tx_packets++;
616 dev->stats.tx_bytes += skb->len;
3e8a72d1 617
4ed70ce9
FF		 618 /* Transmit function may have to reallocate the original SKB */
619 nskb = p->xmit(skb, dev);
620 if (!nskb)
621 return NETDEV_TX_OK;
5aed85ce 622
04ff53f9
FF		 623 /* SKB for netpoll still need to be mangled with the protocol-specific
624 * tag to be successfully transmitted
625 */
626 if (unlikely(netpoll_tx_running(dev)))
627 return dsa_netpoll_send_skb(p, nskb);
628
4ed70ce9
FF		 629 /* Queue the SKB for transmission on the parent interface, but
630 * do not modify its EtherType
631 */
632 nskb->dev = p->parent->dst->master_netdev;
633 dev_queue_xmit(nskb);
5aed85ce
FF		 634
635 return NETDEV_TX_OK;
636}
637
4ed70ce9
FF		 638static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
639 struct net_device *dev)
640{
641 /* Just return the original SKB */
642 return skb;
643}
644
91da11f8
LB		 645
646/* ethtool operations *******************************************************/
647static int
648dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
649{
650 struct dsa_slave_priv *p = netdev_priv(dev);
651 int err;
652
653 err = -EOPNOTSUPP;
654 if (p->phy != NULL) {
655 err = phy_read_status(p->phy);
656 if (err == 0)
657 err = phy_ethtool_gset(p->phy, cmd);
658 }
659
660 return err;
661}
662
663static int
664dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
665{
666 struct dsa_slave_priv *p = netdev_priv(dev);
667
668 if (p->phy != NULL)
669 return phy_ethtool_sset(p->phy, cmd);
670
671 return -EOPNOTSUPP;
672}
673
674static void dsa_slave_get_drvinfo(struct net_device *dev,
675 struct ethtool_drvinfo *drvinfo)
676{
7826d43f
JP		 677 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
678 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
679 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
680 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
91da11f8
LB		 681}
682
3d762a0f
GR		 683static int dsa_slave_get_regs_len(struct net_device *dev)
684{
685 struct dsa_slave_priv *p = netdev_priv(dev);
686 struct dsa_switch *ds = p->parent;
687
688 if (ds->drv->get_regs_len)
689 return ds->drv->get_regs_len(ds, p->port);
690
691 return -EOPNOTSUPP;
692}
693
694static void
695dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
696{
697 struct dsa_slave_priv *p = netdev_priv(dev);
698 struct dsa_switch *ds = p->parent;
699
700 if (ds->drv->get_regs)
701 ds->drv->get_regs(ds, p->port, regs, _p);
702}
703
91da11f8
LB		 704static int dsa_slave_nway_reset(struct net_device *dev)
705{
706 struct dsa_slave_priv *p = netdev_priv(dev);
707
708 if (p->phy != NULL)
709 return genphy_restart_aneg(p->phy);
710
711 return -EOPNOTSUPP;
712}
713
714static u32 dsa_slave_get_link(struct net_device *dev)
715{
716 struct dsa_slave_priv *p = netdev_priv(dev);
717
718 if (p->phy != NULL) {
719 genphy_update_link(p->phy);
720 return p->phy->link;
721 }
722
723 return -EOPNOTSUPP;
724}
725
6793abb4
GR		 726static int dsa_slave_get_eeprom_len(struct net_device *dev)
727{
728 struct dsa_slave_priv *p = netdev_priv(dev);
729 struct dsa_switch *ds = p->parent;
730
731 if (ds->pd->eeprom_len)
732 return ds->pd->eeprom_len;
733
734 if (ds->drv->get_eeprom_len)
735 return ds->drv->get_eeprom_len(ds);
736
737 return 0;
738}
739
740static int dsa_slave_get_eeprom(struct net_device *dev,
741 struct ethtool_eeprom *eeprom, u8 *data)
742{
743 struct dsa_slave_priv *p = netdev_priv(dev);
744 struct dsa_switch *ds = p->parent;
745
746 if (ds->drv->get_eeprom)
747 return ds->drv->get_eeprom(ds, eeprom, data);
748
749 return -EOPNOTSUPP;
750}
751
752static int dsa_slave_set_eeprom(struct net_device *dev,
753 struct ethtool_eeprom *eeprom, u8 *data)
754{
755 struct dsa_slave_priv *p = netdev_priv(dev);
756 struct dsa_switch *ds = p->parent;
757
758 if (ds->drv->set_eeprom)
759 return ds->drv->set_eeprom(ds, eeprom, data);
760
761 return -EOPNOTSUPP;
762}
763
91da11f8
LB		 764static void dsa_slave_get_strings(struct net_device *dev,
765 uint32_t stringset, uint8_t *data)
766{
767 struct dsa_slave_priv *p = netdev_priv(dev);
768 struct dsa_switch *ds = p->parent;
769
770 if (stringset == ETH_SS_STATS) {
771 int len = ETH_GSTRING_LEN;
772
773 strncpy(data, "tx_packets", len);
774 strncpy(data + len, "tx_bytes", len);
775 strncpy(data + 2 * len, "rx_packets", len);
776 strncpy(data + 3 * len, "rx_bytes", len);
777 if (ds->drv->get_strings != NULL)
778 ds->drv->get_strings(ds, p->port, data + 4 * len);
779 }
780}
781
782static void dsa_slave_get_ethtool_stats(struct net_device *dev,
783 struct ethtool_stats *stats,
784 uint64_t *data)
785{
786 struct dsa_slave_priv *p = netdev_priv(dev);
787 struct dsa_switch *ds = p->parent;
788
789 data[0] = p->dev->stats.tx_packets;
790 data[1] = p->dev->stats.tx_bytes;
791 data[2] = p->dev->stats.rx_packets;
792 data[3] = p->dev->stats.rx_bytes;
793 if (ds->drv->get_ethtool_stats != NULL)
794 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
795}
796
797static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
798{
799 struct dsa_slave_priv *p = netdev_priv(dev);
800 struct dsa_switch *ds = p->parent;
801
802 if (sset == ETH_SS_STATS) {
803 int count;
804
805 count = 4;
806 if (ds->drv->get_sset_count != NULL)
807 count += ds->drv->get_sset_count(ds);
808
809 return count;
810 }
811
812 return -EOPNOTSUPP;
813}
814
19e57c4e
FF		 815static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
816{
817 struct dsa_slave_priv *p = netdev_priv(dev);
818 struct dsa_switch *ds = p->parent;
819
820 if (ds->drv->get_wol)
821 ds->drv->get_wol(ds, p->port, w);
822}
823
824static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
825{
826 struct dsa_slave_priv *p = netdev_priv(dev);
827 struct dsa_switch *ds = p->parent;
828 int ret = -EOPNOTSUPP;
829
830 if (ds->drv->set_wol)
831 ret = ds->drv->set_wol(ds, p->port, w);
832
833 return ret;
834}
835
7905288f
FF		 836static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
837{
838 struct dsa_slave_priv *p = netdev_priv(dev);
839 struct dsa_switch *ds = p->parent;
840 int ret;
841
842 if (!ds->drv->set_eee)
843 return -EOPNOTSUPP;
844
845 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
846 if (ret)
847 return ret;
848
849 if (p->phy)
850 ret = phy_ethtool_set_eee(p->phy, e);
851
852 return ret;
853}
854
855static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
856{
857 struct dsa_slave_priv *p = netdev_priv(dev);
858 struct dsa_switch *ds = p->parent;
859 int ret;
860
861 if (!ds->drv->get_eee)
862 return -EOPNOTSUPP;
863
864 ret = ds->drv->get_eee(ds, p->port, e);
865 if (ret)
866 return ret;
867
868 if (p->phy)
869 ret = phy_ethtool_get_eee(p->phy, e);
870
871 return ret;
872}
873
04ff53f9
FF		 874#ifdef CONFIG_NET_POLL_CONTROLLER
875static int dsa_slave_netpoll_setup(struct net_device *dev,
876 struct netpoll_info *ni)
877{
878 struct dsa_slave_priv *p = netdev_priv(dev);
879 struct dsa_switch *ds = p->parent;
880 struct net_device *master = ds->dst->master_netdev;
881 struct netpoll *netpoll;
882 int err = 0;
883
884 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
885 if (!netpoll)
886 return -ENOMEM;
887
888 err = __netpoll_setup(netpoll, master);
889 if (err) {
890 kfree(netpoll);
891 goto out;
892 }
893
894 p->netpoll = netpoll;
895out:
896 return err;
897}
898
899static void dsa_slave_netpoll_cleanup(struct net_device *dev)
900{
901 struct dsa_slave_priv *p = netdev_priv(dev);
902 struct netpoll *netpoll = p->netpoll;
903
904 if (!netpoll)
905 return;
906
907 p->netpoll = NULL;
908
909 __netpoll_free_async(netpoll);
910}
911
912static void dsa_slave_poll_controller(struct net_device *dev)
913{
914}
915#endif
916
91da11f8
LB		 917static const struct ethtool_ops dsa_slave_ethtool_ops = {
918 .get_settings = dsa_slave_get_settings,
919 .set_settings = dsa_slave_set_settings,
920 .get_drvinfo = dsa_slave_get_drvinfo,
3d762a0f
GR		 921 .get_regs_len = dsa_slave_get_regs_len,
922 .get_regs = dsa_slave_get_regs,
91da11f8
LB		 923 .nway_reset = dsa_slave_nway_reset,
924 .get_link = dsa_slave_get_link,
6793abb4
GR		 925 .get_eeprom_len = dsa_slave_get_eeprom_len,
926 .get_eeprom = dsa_slave_get_eeprom,
927 .set_eeprom = dsa_slave_set_eeprom,
91da11f8
LB		 928 .get_strings = dsa_slave_get_strings,
929 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
930 .get_sset_count = dsa_slave_get_sset_count,
19e57c4e
FF		 931 .set_wol = dsa_slave_set_wol,
932 .get_wol = dsa_slave_get_wol,
7905288f
FF		 933 .set_eee = dsa_slave_set_eee,
934 .get_eee = dsa_slave_get_eee,
91da11f8
LB		 935};
936
3e8a72d1 937static const struct net_device_ops dsa_slave_netdev_ops = {
d442ad4a
SH		 938 .ndo_open = dsa_slave_open,
939 .ndo_stop = dsa_slave_close,
3e8a72d1 940 .ndo_start_xmit = dsa_slave_xmit,
d442ad4a
SH		 941 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
942 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
d442ad4a 943 .ndo_set_mac_address = dsa_slave_set_mac_address,
ba14d9eb
VD		 944 .ndo_fdb_add = switchdev_port_fdb_add,
945 .ndo_fdb_del = switchdev_port_fdb_del,
946 .ndo_fdb_dump = switchdev_port_fdb_dump,
d442ad4a 947 .ndo_do_ioctl = dsa_slave_ioctl,
abd2be00 948 .ndo_get_iflink = dsa_slave_get_iflink,
04ff53f9
FF		 949#ifdef CONFIG_NET_POLL_CONTROLLER
950 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
951 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
952 .ndo_poll_controller = dsa_slave_poll_controller,
953#endif
11149536
VD		 954 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
955 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
956 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
98237d43
SF		 957};
958
9d47c0a2 959static const struct switchdev_ops dsa_slave_switchdev_ops = {
f8e20a9f 960 .switchdev_port_attr_get = dsa_slave_port_attr_get,
35636062 961 .switchdev_port_attr_set = dsa_slave_port_attr_set,
ba14d9eb
VD		 962 .switchdev_port_obj_add = dsa_slave_port_obj_add,
963 .switchdev_port_obj_del = dsa_slave_port_obj_del,
964 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
d442ad4a 965};
91da11f8 966
0d8bcdd3
FF		 967static void dsa_slave_adjust_link(struct net_device *dev)
968{
969 struct dsa_slave_priv *p = netdev_priv(dev);
ec9436ba 970 struct dsa_switch *ds = p->parent;
0d8bcdd3
FF		 971 unsigned int status_changed = 0;
972
973 if (p->old_link != p->phy->link) {
974 status_changed = 1;
975 p->old_link = p->phy->link;
976 }
977
978 if (p->old_duplex != p->phy->duplex) {
979 status_changed = 1;
980 p->old_duplex = p->phy->duplex;
981 }
982
983 if (p->old_pause != p->phy->pause) {
984 status_changed = 1;
985 p->old_pause = p->phy->pause;
986 }
987
ec9436ba
FF		 988 if (ds->drv->adjust_link && status_changed)
989 ds->drv->adjust_link(ds, p->port, p->phy);
990
0d8bcdd3
FF		 991 if (status_changed)
992 phy_print_status(p->phy);
993}
994
ce31b31c
FF		 995static int dsa_slave_fixed_link_update(struct net_device *dev,
996 struct fixed_phy_status *status)
997{
998 struct dsa_slave_priv *p = netdev_priv(dev);
999 struct dsa_switch *ds = p->parent;
1000
1001 if (ds->drv->fixed_link_update)
1002 ds->drv->fixed_link_update(ds, p->port, status);
1003
1004 return 0;
1005}
1006
91da11f8 1007/* slave device setup *******************************************************/
c305c165 1008static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
cd28a1a9
FF		 1009 struct net_device *slave_dev,
1010 int addr)
c305c165
FF		 1011{
1012 struct dsa_switch *ds = p->parent;
1013
cd28a1a9 1014 p->phy = ds->slave_mii_bus->phy_map[addr];
c305c165
FF		 1015 if (!p->phy)
1016 return -ENODEV;
1017
1018 /* Use already configured phy mode */
211c504a
FF		 1019 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1020 p->phy_interface = p->phy->interface;
c305c165
FF		 1021 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
1022 p->phy_interface);
1023
1024 return 0;
1025}
1026
9697f1cd 1027static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
0d8bcdd3
FF		 1028 struct net_device *slave_dev)
1029{
1030 struct dsa_switch *ds = p->parent;
1031 struct dsa_chip_data *cd = ds->pd;
1032 struct device_node *phy_dn, *port_dn;
ce31b31c 1033 bool phy_is_fixed = false;
6819563e 1034 u32 phy_flags = 0;
19334920 1035 int mode, ret;
0d8bcdd3
FF		 1036
1037 port_dn = cd->port_dn[p->port];
19334920
GR		 1038 mode = of_get_phy_mode(port_dn);
1039 if (mode < 0)
1040 mode = PHY_INTERFACE_MODE_NA;
1041 p->phy_interface = mode;
0d8bcdd3
FF		 1042
1043 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1044 if (of_phy_is_fixed_link(port_dn)) {
1045 /* In the case of a fixed PHY, the DT node associated
1046 * to the fixed PHY is the Port DT node
1047 */
1048 ret = of_phy_register_fixed_link(port_dn);
1049 if (ret) {
a2ae6007 1050 netdev_err(slave_dev, "failed to register fixed PHY\n");
9697f1cd 1051 return ret;
0d8bcdd3 1052 }
ce31b31c 1053 phy_is_fixed = true;
0d8bcdd3
FF		 1054 phy_dn = port_dn;
1055 }
1056
6819563e
FF		 1057 if (ds->drv->get_phy_flags)
1058 phy_flags = ds->drv->get_phy_flags(ds, p->port);
1059
cd28a1a9
FF		 1060 if (phy_dn) {
1061 ret = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
1062 /* If this PHY address is part of phys_mii_mask, which means
1063 * that we need to divert reads and writes to/from it, then we
1064 * want to bind this device using the slave MII bus created by
1065 * DSA to make that happen.
1066 */
96026d05
FF		 1067 if (!phy_is_fixed && ret >= 0 &&
1068 (ds->phys_mii_mask & (1 << ret))) {
cd28a1a9
FF		 1069 ret = dsa_slave_phy_connect(p, slave_dev, ret);
1070 if (ret)
1071 return ret;
1072 } else {
1073 p->phy = of_phy_connect(slave_dev, phy_dn,
1074 dsa_slave_adjust_link,
1075 phy_flags,
1076 p->phy_interface);
1077 }
1078 }
0d8bcdd3 1079
ce31b31c
FF		 1080 if (p->phy && phy_is_fixed)
1081 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
1082
0d8bcdd3
FF		 1083 /* We could not connect to a designated PHY, so use the switch internal
1084 * MDIO bus instead
1085 */
b31f65fb 1086 if (!p->phy) {
cd28a1a9 1087 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
c305c165
FF		 1088 if (ret)
1089 return ret;
b31f65fb 1090 } else {
a2ae6007
JP		 1091 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
1092 p->phy->addr, p->phy->drv->name);
b31f65fb 1093 }
9697f1cd
FF		 1094
1095 return 0;
0d8bcdd3
FF		 1096}
1097
448b4482
AL		 1098static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1099static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1100 struct netdev_queue *txq,
1101 void *_unused)
1102{
1103 lockdep_set_class(&txq->_xmit_lock,
1104 &dsa_slave_netdev_xmit_lock_key);
1105}
1106
24462549
FF		 1107int dsa_slave_suspend(struct net_device *slave_dev)
1108{
1109 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1110
24462549
FF		 1111 if (p->phy) {
1112 phy_stop(p->phy);
1113 p->old_pause = -1;
1114 p->old_link = -1;
1115 p->old_duplex = -1;
1116 phy_suspend(p->phy);
1117 }
1118
1119 return 0;
1120}
1121
1122int dsa_slave_resume(struct net_device *slave_dev)
1123{
1124 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1125
1126 netif_device_attach(slave_dev);
1127
1128 if (p->phy) {
1129 phy_resume(p->phy);
1130 phy_start(p->phy);
1131 }
1132
1133 return 0;
1134}
1135
d87d6f44
GR		 1136int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1137 int port, char *name)
91da11f8 1138{
e84665c9 1139 struct net_device *master = ds->dst->master_netdev;
91da11f8
LB		 1140 struct net_device *slave_dev;
1141 struct dsa_slave_priv *p;
1142 int ret;
1143
c835a677
TG		 1144 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1145 NET_NAME_UNKNOWN, ether_setup);
91da11f8 1146 if (slave_dev == NULL)
d87d6f44 1147 return -ENOMEM;
91da11f8
LB		 1148
1149 slave_dev->features = master->vlan_features;
7ad24ea4 1150 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
2fcc8005 1151 eth_hw_addr_inherit(slave_dev, master);
0a5f107b 1152 slave_dev->priv_flags |= IFF_NO_QUEUE;
3e8a72d1 1153 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
9d47c0a2 1154 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
d442ad4a 1155
448b4482
AL		 1156 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1157 NULL);
1158
5075314e
AD		 1159 SET_NETDEV_DEV(slave_dev, parent);
1160 slave_dev->dev.of_node = ds->pd->port_dn[port];
1161 slave_dev->vlan_features = master->vlan_features;
1162
1163 p = netdev_priv(slave_dev);
1164 p->dev = slave_dev;
1165 p->parent = ds;
1166 p->port = port;
1167
e84665c9 1168 switch (ds->dst->tag_protocol) {
cf85d08f 1169#ifdef CONFIG_NET_DSA_TAG_DSA
ac7a04c3 1170 case DSA_TAG_PROTO_DSA:
5075314e 1171 p->xmit = dsa_netdev_ops.xmit;
cf85d08f
LB		 1172 break;
1173#endif
91da11f8 1174#ifdef CONFIG_NET_DSA_TAG_EDSA
ac7a04c3 1175 case DSA_TAG_PROTO_EDSA:
5075314e 1176 p->xmit = edsa_netdev_ops.xmit;
91da11f8 1177 break;
396138f0
LB		 1178#endif
1179#ifdef CONFIG_NET_DSA_TAG_TRAILER
ac7a04c3 1180 case DSA_TAG_PROTO_TRAILER:
5075314e 1181 p->xmit = trailer_netdev_ops.xmit;
396138f0 1182 break;
5037d532
FF		 1183#endif
1184#ifdef CONFIG_NET_DSA_TAG_BRCM
ac7a04c3 1185 case DSA_TAG_PROTO_BRCM:
5075314e 1186 p->xmit = brcm_netdev_ops.xmit;
5037d532 1187 break;
91da11f8
LB		 1188#endif
1189 default:
5075314e 1190 p->xmit = dsa_slave_notag_xmit;
5aed85ce 1191 break;
91da11f8 1192 }
d442ad4a 1193
0d8bcdd3
FF		 1194 p->old_pause = -1;
1195 p->old_link = -1;
1196 p->old_duplex = -1;
1197
9697f1cd
FF		 1198 ret = dsa_slave_phy_setup(p, slave_dev);
1199 if (ret) {
1200 free_netdev(slave_dev);
d87d6f44 1201 return ret;
9697f1cd 1202 }
91da11f8 1203
d87d6f44 1204 ds->ports[port] = slave_dev;
91da11f8
LB		 1205 ret = register_netdev(slave_dev);
1206 if (ret) {
a2ae6007
JP		 1207 netdev_err(master, "error %d registering interface %s\n",
1208 ret, slave_dev->name);
9697f1cd 1209 phy_disconnect(p->phy);
d87d6f44 1210 ds->ports[port] = NULL;
91da11f8 1211 free_netdev(slave_dev);
d87d6f44 1212 return ret;
91da11f8
LB		 1213 }
1214
1215 netif_carrier_off(slave_dev);
1216
d87d6f44 1217 return 0;
91da11f8 1218}
b73adef6
FF		 1219
1220static bool dsa_slave_dev_check(struct net_device *dev)
1221{
1222 return dev->netdev_ops == &dsa_slave_netdev_ops;
1223}
1224
1225static int dsa_slave_master_changed(struct net_device *dev)
1226{
1227 struct net_device *master = netdev_master_upper_dev_get(dev);
b06b107a 1228 struct dsa_slave_priv *p = netdev_priv(dev);
b73adef6
FF		 1229 int err = 0;
1230
1231 if (master && master->rtnl_link_ops &&
1232 !strcmp(master->rtnl_link_ops->kind, "bridge"))
1233 err = dsa_slave_bridge_port_join(dev, master);
b06b107a 1234 else if (dsa_port_is_bridged(p))
b73adef6
FF		 1235 err = dsa_slave_bridge_port_leave(dev);
1236
1237 return err;
1238}
1239
1240int dsa_slave_netdevice_event(struct notifier_block *unused,
1241 unsigned long event, void *ptr)
1242{
1243 struct net_device *dev;
1244 int err = 0;
1245
1246 switch (event) {
1247 case NETDEV_CHANGEUPPER:
1248 dev = netdev_notifier_info_to_dev(ptr);
1249 if (!dsa_slave_dev_check(dev))
1250 goto out;
1251
1252 err = dsa_slave_master_changed(dev);
1253 if (err)
1254 netdev_warn(dev, "failed to reflect master change\n");
1255
1256 break;
1257 }
1258
1259out:
1260 return NOTIFY_DONE;
1261}
Linux 6.x block layer and io_uring tree(s)