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[mirror_ubuntu-bionic-kernel.git] / net / dsa / slave.c
1 /*
2 * net/dsa/slave.c - Slave device handling
3 * Copyright (c) 2008-2009 Marvell Semiconductor
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>
12 #include <linux/etherdevice.h>
13 #include <linux/netdevice.h>
14 #include <linux/phy.h>
15 #include <linux/phy_fixed.h>
16 #include <linux/of_net.h>
17 #include <linux/of_mdio.h>
18 #include <linux/mdio.h>
19 #include <net/rtnetlink.h>
20 #include <net/switchdev.h>
21 #include <linux/if_bridge.h>
22 #include <linux/netpoll.h>
23 #include "dsa_priv.h"
24
25 /* slave mii_bus handling ***************************************************/
26 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
27 {
28 struct dsa_switch *ds = bus->priv;
29
30 if (ds->phys_mii_mask & (1 << addr))
31 return ds->ops->phy_read(ds, addr, reg);
32
33 return 0xffff;
34 }
35
36 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
37 {
38 struct dsa_switch *ds = bus->priv;
39
40 if (ds->phys_mii_mask & (1 << addr))
41 return ds->ops->phy_write(ds, addr, reg, val);
42
43 return 0;
44 }
45
46 void 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;
52 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
53 ds->dst->tree, ds->index);
54 ds->slave_mii_bus->parent = ds->dev;
55 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
56 }
57
58
59 /* slave device handling ****************************************************/
60 static int dsa_slave_get_iflink(const struct net_device *dev)
61 {
62 struct dsa_slave_priv *p = netdev_priv(dev);
63
64 return p->parent->dst->master_netdev->ifindex;
65 }
66
67 static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p)
68 {
69 return !!p->bridge_dev;
70 }
71
72 static void dsa_port_set_stp_state(struct dsa_switch *ds, int port, u8 state)
73 {
74 struct dsa_port *dp = &ds->ports[port];
75
76 if (ds->ops->port_stp_state_set)
77 ds->ops->port_stp_state_set(ds, port, state);
78
79 if (ds->ops->port_fast_age) {
80 /* Fast age FDB entries or flush appropriate forwarding database
81 * for the given port, if we are moving it from Learning or
82 * Forwarding state, to Disabled or Blocking or Listening state.
83 */
84
85 if ((dp->stp_state == BR_STATE_LEARNING ||
86 dp->stp_state == BR_STATE_FORWARDING) &&
87 (state == BR_STATE_DISABLED ||
88 state == BR_STATE_BLOCKING ||
89 state == BR_STATE_LISTENING))
90 ds->ops->port_fast_age(ds, port);
91 }
92
93 dp->stp_state = state;
94 }
95
96 static int dsa_slave_open(struct net_device *dev)
97 {
98 struct dsa_slave_priv *p = netdev_priv(dev);
99 struct net_device *master = p->parent->dst->master_netdev;
100 struct dsa_switch *ds = p->parent;
101 u8 stp_state = dsa_port_is_bridged(p) ?
102 BR_STATE_BLOCKING : BR_STATE_FORWARDING;
103 int err;
104
105 if (!(master->flags & IFF_UP))
106 return -ENETDOWN;
107
108 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
109 err = dev_uc_add(master, dev->dev_addr);
110 if (err < 0)
111 goto out;
112 }
113
114 if (dev->flags & IFF_ALLMULTI) {
115 err = dev_set_allmulti(master, 1);
116 if (err < 0)
117 goto del_unicast;
118 }
119 if (dev->flags & IFF_PROMISC) {
120 err = dev_set_promiscuity(master, 1);
121 if (err < 0)
122 goto clear_allmulti;
123 }
124
125 if (ds->ops->port_enable) {
126 err = ds->ops->port_enable(ds, p->port, p->phy);
127 if (err)
128 goto clear_promisc;
129 }
130
131 dsa_port_set_stp_state(ds, p->port, stp_state);
132
133 if (p->phy)
134 phy_start(p->phy);
135
136 return 0;
137
138 clear_promisc:
139 if (dev->flags & IFF_PROMISC)
140 dev_set_promiscuity(master, -1);
141 clear_allmulti:
142 if (dev->flags & IFF_ALLMULTI)
143 dev_set_allmulti(master, -1);
144 del_unicast:
145 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
146 dev_uc_del(master, dev->dev_addr);
147 out:
148 return err;
149 }
150
151 static int dsa_slave_close(struct net_device *dev)
152 {
153 struct dsa_slave_priv *p = netdev_priv(dev);
154 struct net_device *master = p->parent->dst->master_netdev;
155 struct dsa_switch *ds = p->parent;
156
157 if (p->phy)
158 phy_stop(p->phy);
159
160 dev_mc_unsync(master, dev);
161 dev_uc_unsync(master, dev);
162 if (dev->flags & IFF_ALLMULTI)
163 dev_set_allmulti(master, -1);
164 if (dev->flags & IFF_PROMISC)
165 dev_set_promiscuity(master, -1);
166
167 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
168 dev_uc_del(master, dev->dev_addr);
169
170 if (ds->ops->port_disable)
171 ds->ops->port_disable(ds, p->port, p->phy);
172
173 dsa_port_set_stp_state(ds, p->port, BR_STATE_DISABLED);
174
175 return 0;
176 }
177
178 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
179 {
180 struct dsa_slave_priv *p = netdev_priv(dev);
181 struct net_device *master = p->parent->dst->master_netdev;
182
183 if (change & IFF_ALLMULTI)
184 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
185 if (change & IFF_PROMISC)
186 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
187 }
188
189 static void dsa_slave_set_rx_mode(struct net_device *dev)
190 {
191 struct dsa_slave_priv *p = netdev_priv(dev);
192 struct net_device *master = p->parent->dst->master_netdev;
193
194 dev_mc_sync(master, dev);
195 dev_uc_sync(master, dev);
196 }
197
198 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
199 {
200 struct dsa_slave_priv *p = netdev_priv(dev);
201 struct net_device *master = p->parent->dst->master_netdev;
202 struct sockaddr *addr = a;
203 int err;
204
205 if (!is_valid_ether_addr(addr->sa_data))
206 return -EADDRNOTAVAIL;
207
208 if (!(dev->flags & IFF_UP))
209 goto out;
210
211 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
212 err = dev_uc_add(master, addr->sa_data);
213 if (err < 0)
214 return err;
215 }
216
217 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
218 dev_uc_del(master, dev->dev_addr);
219
220 out:
221 ether_addr_copy(dev->dev_addr, addr->sa_data);
222
223 return 0;
224 }
225
226 static int dsa_slave_port_vlan_add(struct net_device *dev,
227 const struct switchdev_obj_port_vlan *vlan,
228 struct switchdev_trans *trans)
229 {
230 struct dsa_slave_priv *p = netdev_priv(dev);
231 struct dsa_switch *ds = p->parent;
232
233 if (switchdev_trans_ph_prepare(trans)) {
234 if (!ds->ops->port_vlan_prepare || !ds->ops->port_vlan_add)
235 return -EOPNOTSUPP;
236
237 return ds->ops->port_vlan_prepare(ds, p->port, vlan, trans);
238 }
239
240 ds->ops->port_vlan_add(ds, p->port, vlan, trans);
241
242 return 0;
243 }
244
245 static int dsa_slave_port_vlan_del(struct net_device *dev,
246 const struct switchdev_obj_port_vlan *vlan)
247 {
248 struct dsa_slave_priv *p = netdev_priv(dev);
249 struct dsa_switch *ds = p->parent;
250
251 if (!ds->ops->port_vlan_del)
252 return -EOPNOTSUPP;
253
254 return ds->ops->port_vlan_del(ds, p->port, vlan);
255 }
256
257 static int dsa_slave_port_vlan_dump(struct net_device *dev,
258 struct switchdev_obj_port_vlan *vlan,
259 switchdev_obj_dump_cb_t *cb)
260 {
261 struct dsa_slave_priv *p = netdev_priv(dev);
262 struct dsa_switch *ds = p->parent;
263
264 if (ds->ops->port_vlan_dump)
265 return ds->ops->port_vlan_dump(ds, p->port, vlan, cb);
266
267 return -EOPNOTSUPP;
268 }
269
270 static int dsa_slave_port_fdb_add(struct net_device *dev,
271 const struct switchdev_obj_port_fdb *fdb,
272 struct switchdev_trans *trans)
273 {
274 struct dsa_slave_priv *p = netdev_priv(dev);
275 struct dsa_switch *ds = p->parent;
276
277 if (switchdev_trans_ph_prepare(trans)) {
278 if (!ds->ops->port_fdb_prepare || !ds->ops->port_fdb_add)
279 return -EOPNOTSUPP;
280
281 return ds->ops->port_fdb_prepare(ds, p->port, fdb, trans);
282 }
283
284 ds->ops->port_fdb_add(ds, p->port, fdb, trans);
285
286 return 0;
287 }
288
289 static int dsa_slave_port_fdb_del(struct net_device *dev,
290 const struct switchdev_obj_port_fdb *fdb)
291 {
292 struct dsa_slave_priv *p = netdev_priv(dev);
293 struct dsa_switch *ds = p->parent;
294 int ret = -EOPNOTSUPP;
295
296 if (ds->ops->port_fdb_del)
297 ret = ds->ops->port_fdb_del(ds, p->port, fdb);
298
299 return ret;
300 }
301
302 static int dsa_slave_port_fdb_dump(struct net_device *dev,
303 struct switchdev_obj_port_fdb *fdb,
304 switchdev_obj_dump_cb_t *cb)
305 {
306 struct dsa_slave_priv *p = netdev_priv(dev);
307 struct dsa_switch *ds = p->parent;
308
309 if (ds->ops->port_fdb_dump)
310 return ds->ops->port_fdb_dump(ds, p->port, fdb, cb);
311
312 return -EOPNOTSUPP;
313 }
314
315 static int dsa_slave_port_mdb_add(struct net_device *dev,
316 const struct switchdev_obj_port_mdb *mdb,
317 struct switchdev_trans *trans)
318 {
319 struct dsa_slave_priv *p = netdev_priv(dev);
320 struct dsa_switch *ds = p->parent;
321
322 if (switchdev_trans_ph_prepare(trans)) {
323 if (!ds->ops->port_mdb_prepare || !ds->ops->port_mdb_add)
324 return -EOPNOTSUPP;
325
326 return ds->ops->port_mdb_prepare(ds, p->port, mdb, trans);
327 }
328
329 ds->ops->port_mdb_add(ds, p->port, mdb, trans);
330
331 return 0;
332 }
333
334 static int dsa_slave_port_mdb_del(struct net_device *dev,
335 const struct switchdev_obj_port_mdb *mdb)
336 {
337 struct dsa_slave_priv *p = netdev_priv(dev);
338 struct dsa_switch *ds = p->parent;
339
340 if (ds->ops->port_mdb_del)
341 return ds->ops->port_mdb_del(ds, p->port, mdb);
342
343 return -EOPNOTSUPP;
344 }
345
346 static int dsa_slave_port_mdb_dump(struct net_device *dev,
347 struct switchdev_obj_port_mdb *mdb,
348 switchdev_obj_dump_cb_t *cb)
349 {
350 struct dsa_slave_priv *p = netdev_priv(dev);
351 struct dsa_switch *ds = p->parent;
352
353 if (ds->ops->port_mdb_dump)
354 return ds->ops->port_mdb_dump(ds, p->port, mdb, cb);
355
356 return -EOPNOTSUPP;
357 }
358
359 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
360 {
361 struct dsa_slave_priv *p = netdev_priv(dev);
362
363 if (p->phy != NULL)
364 return phy_mii_ioctl(p->phy, ifr, cmd);
365
366 return -EOPNOTSUPP;
367 }
368
369 static int dsa_slave_stp_state_set(struct net_device *dev,
370 const struct switchdev_attr *attr,
371 struct switchdev_trans *trans)
372 {
373 struct dsa_slave_priv *p = netdev_priv(dev);
374 struct dsa_switch *ds = p->parent;
375
376 if (switchdev_trans_ph_prepare(trans))
377 return ds->ops->port_stp_state_set ? 0 : -EOPNOTSUPP;
378
379 dsa_port_set_stp_state(ds, p->port, attr->u.stp_state);
380
381 return 0;
382 }
383
384 static int dsa_slave_vlan_filtering(struct net_device *dev,
385 const struct switchdev_attr *attr,
386 struct switchdev_trans *trans)
387 {
388 struct dsa_slave_priv *p = netdev_priv(dev);
389 struct dsa_switch *ds = p->parent;
390
391 /* bridge skips -EOPNOTSUPP, so skip the prepare phase */
392 if (switchdev_trans_ph_prepare(trans))
393 return 0;
394
395 if (ds->ops->port_vlan_filtering)
396 return ds->ops->port_vlan_filtering(ds, p->port,
397 attr->u.vlan_filtering);
398
399 return 0;
400 }
401
402 static int dsa_fastest_ageing_time(struct dsa_switch *ds,
403 unsigned int ageing_time)
404 {
405 int i;
406
407 for (i = 0; i < DSA_MAX_PORTS; ++i) {
408 struct dsa_port *dp = &ds->ports[i];
409
410 if (dp && dp->ageing_time && dp->ageing_time < ageing_time)
411 ageing_time = dp->ageing_time;
412 }
413
414 return ageing_time;
415 }
416
417 static int dsa_slave_ageing_time(struct net_device *dev,
418 const struct switchdev_attr *attr,
419 struct switchdev_trans *trans)
420 {
421 struct dsa_slave_priv *p = netdev_priv(dev);
422 struct dsa_switch *ds = p->parent;
423 unsigned long ageing_jiffies = clock_t_to_jiffies(attr->u.ageing_time);
424 unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
425
426 /* bridge skips -EOPNOTSUPP, so skip the prepare phase */
427 if (switchdev_trans_ph_prepare(trans))
428 return 0;
429
430 /* Keep the fastest ageing time in case of multiple bridges */
431 ds->ports[p->port].ageing_time = ageing_time;
432 ageing_time = dsa_fastest_ageing_time(ds, ageing_time);
433
434 if (ds->ops->set_ageing_time)
435 return ds->ops->set_ageing_time(ds, ageing_time);
436
437 return 0;
438 }
439
440 static int dsa_slave_port_attr_set(struct net_device *dev,
441 const struct switchdev_attr *attr,
442 struct switchdev_trans *trans)
443 {
444 int ret;
445
446 switch (attr->id) {
447 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
448 ret = dsa_slave_stp_state_set(dev, attr, trans);
449 break;
450 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
451 ret = dsa_slave_vlan_filtering(dev, attr, trans);
452 break;
453 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
454 ret = dsa_slave_ageing_time(dev, attr, trans);
455 break;
456 default:
457 ret = -EOPNOTSUPP;
458 break;
459 }
460
461 return ret;
462 }
463
464 static int dsa_slave_port_obj_add(struct net_device *dev,
465 const struct switchdev_obj *obj,
466 struct switchdev_trans *trans)
467 {
468 int err;
469
470 /* For the prepare phase, ensure the full set of changes is feasable in
471 * one go in order to signal a failure properly. If an operation is not
472 * supported, return -EOPNOTSUPP.
473 */
474
475 switch (obj->id) {
476 case SWITCHDEV_OBJ_ID_PORT_FDB:
477 err = dsa_slave_port_fdb_add(dev,
478 SWITCHDEV_OBJ_PORT_FDB(obj),
479 trans);
480 break;
481 case SWITCHDEV_OBJ_ID_PORT_MDB:
482 err = dsa_slave_port_mdb_add(dev, SWITCHDEV_OBJ_PORT_MDB(obj),
483 trans);
484 break;
485 case SWITCHDEV_OBJ_ID_PORT_VLAN:
486 err = dsa_slave_port_vlan_add(dev,
487 SWITCHDEV_OBJ_PORT_VLAN(obj),
488 trans);
489 break;
490 default:
491 err = -EOPNOTSUPP;
492 break;
493 }
494
495 return err;
496 }
497
498 static int dsa_slave_port_obj_del(struct net_device *dev,
499 const struct switchdev_obj *obj)
500 {
501 int err;
502
503 switch (obj->id) {
504 case SWITCHDEV_OBJ_ID_PORT_FDB:
505 err = dsa_slave_port_fdb_del(dev,
506 SWITCHDEV_OBJ_PORT_FDB(obj));
507 break;
508 case SWITCHDEV_OBJ_ID_PORT_MDB:
509 err = dsa_slave_port_mdb_del(dev, SWITCHDEV_OBJ_PORT_MDB(obj));
510 break;
511 case SWITCHDEV_OBJ_ID_PORT_VLAN:
512 err = dsa_slave_port_vlan_del(dev,
513 SWITCHDEV_OBJ_PORT_VLAN(obj));
514 break;
515 default:
516 err = -EOPNOTSUPP;
517 break;
518 }
519
520 return err;
521 }
522
523 static int dsa_slave_port_obj_dump(struct net_device *dev,
524 struct switchdev_obj *obj,
525 switchdev_obj_dump_cb_t *cb)
526 {
527 int err;
528
529 switch (obj->id) {
530 case SWITCHDEV_OBJ_ID_PORT_FDB:
531 err = dsa_slave_port_fdb_dump(dev,
532 SWITCHDEV_OBJ_PORT_FDB(obj),
533 cb);
534 break;
535 case SWITCHDEV_OBJ_ID_PORT_MDB:
536 err = dsa_slave_port_mdb_dump(dev, SWITCHDEV_OBJ_PORT_MDB(obj),
537 cb);
538 break;
539 case SWITCHDEV_OBJ_ID_PORT_VLAN:
540 err = dsa_slave_port_vlan_dump(dev,
541 SWITCHDEV_OBJ_PORT_VLAN(obj),
542 cb);
543 break;
544 default:
545 err = -EOPNOTSUPP;
546 break;
547 }
548
549 return err;
550 }
551
552 static int dsa_slave_bridge_port_join(struct net_device *dev,
553 struct net_device *br)
554 {
555 struct dsa_slave_priv *p = netdev_priv(dev);
556 struct dsa_switch *ds = p->parent;
557 int ret = -EOPNOTSUPP;
558
559 p->bridge_dev = br;
560
561 if (ds->ops->port_bridge_join)
562 ret = ds->ops->port_bridge_join(ds, p->port, br);
563
564 return ret == -EOPNOTSUPP ? 0 : ret;
565 }
566
567 static void dsa_slave_bridge_port_leave(struct net_device *dev)
568 {
569 struct dsa_slave_priv *p = netdev_priv(dev);
570 struct dsa_switch *ds = p->parent;
571
572
573 if (ds->ops->port_bridge_leave)
574 ds->ops->port_bridge_leave(ds, p->port);
575
576 p->bridge_dev = NULL;
577
578 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
579 * so allow it to be in BR_STATE_FORWARDING to be kept functional
580 */
581 dsa_port_set_stp_state(ds, p->port, BR_STATE_FORWARDING);
582 }
583
584 static int dsa_slave_port_attr_get(struct net_device *dev,
585 struct switchdev_attr *attr)
586 {
587 struct dsa_slave_priv *p = netdev_priv(dev);
588 struct dsa_switch *ds = p->parent;
589
590 switch (attr->id) {
591 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
592 attr->u.ppid.id_len = sizeof(ds->index);
593 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
594 break;
595 default:
596 return -EOPNOTSUPP;
597 }
598
599 return 0;
600 }
601
602 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
603 struct sk_buff *skb)
604 {
605 #ifdef CONFIG_NET_POLL_CONTROLLER
606 if (p->netpoll)
607 netpoll_send_skb(p->netpoll, skb);
608 #else
609 BUG();
610 #endif
611 return NETDEV_TX_OK;
612 }
613
614 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
615 {
616 struct dsa_slave_priv *p = netdev_priv(dev);
617 struct sk_buff *nskb;
618
619 dev->stats.tx_packets++;
620 dev->stats.tx_bytes += skb->len;
621
622 /* Transmit function may have to reallocate the original SKB */
623 nskb = p->xmit(skb, dev);
624 if (!nskb)
625 return NETDEV_TX_OK;
626
627 /* SKB for netpoll still need to be mangled with the protocol-specific
628 * tag to be successfully transmitted
629 */
630 if (unlikely(netpoll_tx_running(dev)))
631 return dsa_netpoll_send_skb(p, nskb);
632
633 /* Queue the SKB for transmission on the parent interface, but
634 * do not modify its EtherType
635 */
636 nskb->dev = p->parent->dst->master_netdev;
637 dev_queue_xmit(nskb);
638
639 return NETDEV_TX_OK;
640 }
641
642 /* ethtool operations *******************************************************/
643 static int
644 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
645 {
646 struct dsa_slave_priv *p = netdev_priv(dev);
647 int err;
648
649 err = -EOPNOTSUPP;
650 if (p->phy != NULL) {
651 err = phy_read_status(p->phy);
652 if (err == 0)
653 err = phy_ethtool_gset(p->phy, cmd);
654 }
655
656 return err;
657 }
658
659 static int
660 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
661 {
662 struct dsa_slave_priv *p = netdev_priv(dev);
663
664 if (p->phy != NULL)
665 return phy_ethtool_sset(p->phy, cmd);
666
667 return -EOPNOTSUPP;
668 }
669
670 static void dsa_slave_get_drvinfo(struct net_device *dev,
671 struct ethtool_drvinfo *drvinfo)
672 {
673 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
674 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
675 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
676 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
677 }
678
679 static int dsa_slave_get_regs_len(struct net_device *dev)
680 {
681 struct dsa_slave_priv *p = netdev_priv(dev);
682 struct dsa_switch *ds = p->parent;
683
684 if (ds->ops->get_regs_len)
685 return ds->ops->get_regs_len(ds, p->port);
686
687 return -EOPNOTSUPP;
688 }
689
690 static void
691 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
692 {
693 struct dsa_slave_priv *p = netdev_priv(dev);
694 struct dsa_switch *ds = p->parent;
695
696 if (ds->ops->get_regs)
697 ds->ops->get_regs(ds, p->port, regs, _p);
698 }
699
700 static int dsa_slave_nway_reset(struct net_device *dev)
701 {
702 struct dsa_slave_priv *p = netdev_priv(dev);
703
704 if (p->phy != NULL)
705 return genphy_restart_aneg(p->phy);
706
707 return -EOPNOTSUPP;
708 }
709
710 static u32 dsa_slave_get_link(struct net_device *dev)
711 {
712 struct dsa_slave_priv *p = netdev_priv(dev);
713
714 if (p->phy != NULL) {
715 genphy_update_link(p->phy);
716 return p->phy->link;
717 }
718
719 return -EOPNOTSUPP;
720 }
721
722 static int dsa_slave_get_eeprom_len(struct net_device *dev)
723 {
724 struct dsa_slave_priv *p = netdev_priv(dev);
725 struct dsa_switch *ds = p->parent;
726
727 if (ds->cd && ds->cd->eeprom_len)
728 return ds->cd->eeprom_len;
729
730 if (ds->ops->get_eeprom_len)
731 return ds->ops->get_eeprom_len(ds);
732
733 return 0;
734 }
735
736 static int dsa_slave_get_eeprom(struct net_device *dev,
737 struct ethtool_eeprom *eeprom, u8 *data)
738 {
739 struct dsa_slave_priv *p = netdev_priv(dev);
740 struct dsa_switch *ds = p->parent;
741
742 if (ds->ops->get_eeprom)
743 return ds->ops->get_eeprom(ds, eeprom, data);
744
745 return -EOPNOTSUPP;
746 }
747
748 static int dsa_slave_set_eeprom(struct net_device *dev,
749 struct ethtool_eeprom *eeprom, u8 *data)
750 {
751 struct dsa_slave_priv *p = netdev_priv(dev);
752 struct dsa_switch *ds = p->parent;
753
754 if (ds->ops->set_eeprom)
755 return ds->ops->set_eeprom(ds, eeprom, data);
756
757 return -EOPNOTSUPP;
758 }
759
760 static void dsa_slave_get_strings(struct net_device *dev,
761 uint32_t stringset, uint8_t *data)
762 {
763 struct dsa_slave_priv *p = netdev_priv(dev);
764 struct dsa_switch *ds = p->parent;
765
766 if (stringset == ETH_SS_STATS) {
767 int len = ETH_GSTRING_LEN;
768
769 strncpy(data, "tx_packets", len);
770 strncpy(data + len, "tx_bytes", len);
771 strncpy(data + 2 * len, "rx_packets", len);
772 strncpy(data + 3 * len, "rx_bytes", len);
773 if (ds->ops->get_strings)
774 ds->ops->get_strings(ds, p->port, data + 4 * len);
775 }
776 }
777
778 static void dsa_cpu_port_get_ethtool_stats(struct net_device *dev,
779 struct ethtool_stats *stats,
780 uint64_t *data)
781 {
782 struct dsa_switch_tree *dst = dev->dsa_ptr;
783 struct dsa_switch *ds = dst->ds[0];
784 s8 cpu_port = dst->cpu_port;
785 int count = 0;
786
787 if (dst->master_ethtool_ops.get_sset_count) {
788 count = dst->master_ethtool_ops.get_sset_count(dev,
789 ETH_SS_STATS);
790 dst->master_ethtool_ops.get_ethtool_stats(dev, stats, data);
791 }
792
793 if (ds->ops->get_ethtool_stats)
794 ds->ops->get_ethtool_stats(ds, cpu_port, data + count);
795 }
796
797 static int dsa_cpu_port_get_sset_count(struct net_device *dev, int sset)
798 {
799 struct dsa_switch_tree *dst = dev->dsa_ptr;
800 struct dsa_switch *ds = dst->ds[0];
801 int count = 0;
802
803 if (dst->master_ethtool_ops.get_sset_count)
804 count += dst->master_ethtool_ops.get_sset_count(dev, sset);
805
806 if (sset == ETH_SS_STATS && ds->ops->get_sset_count)
807 count += ds->ops->get_sset_count(ds);
808
809 return count;
810 }
811
812 static void dsa_cpu_port_get_strings(struct net_device *dev,
813 uint32_t stringset, uint8_t *data)
814 {
815 struct dsa_switch_tree *dst = dev->dsa_ptr;
816 struct dsa_switch *ds = dst->ds[0];
817 s8 cpu_port = dst->cpu_port;
818 int len = ETH_GSTRING_LEN;
819 int mcount = 0, count;
820 unsigned int i;
821 uint8_t pfx[4];
822 uint8_t *ndata;
823
824 snprintf(pfx, sizeof(pfx), "p%.2d", cpu_port);
825 /* We do not want to be NULL-terminated, since this is a prefix */
826 pfx[sizeof(pfx) - 1] = '_';
827
828 if (dst->master_ethtool_ops.get_sset_count) {
829 mcount = dst->master_ethtool_ops.get_sset_count(dev,
830 ETH_SS_STATS);
831 dst->master_ethtool_ops.get_strings(dev, stringset, data);
832 }
833
834 if (stringset == ETH_SS_STATS && ds->ops->get_strings) {
835 ndata = data + mcount * len;
836 /* This function copies ETH_GSTRINGS_LEN bytes, we will mangle
837 * the output after to prepend our CPU port prefix we
838 * constructed earlier
839 */
840 ds->ops->get_strings(ds, cpu_port, ndata);
841 count = ds->ops->get_sset_count(ds);
842 for (i = 0; i < count; i++) {
843 memmove(ndata + (i * len + sizeof(pfx)),
844 ndata + i * len, len - sizeof(pfx));
845 memcpy(ndata + i * len, pfx, sizeof(pfx));
846 }
847 }
848 }
849
850 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
851 struct ethtool_stats *stats,
852 uint64_t *data)
853 {
854 struct dsa_slave_priv *p = netdev_priv(dev);
855 struct dsa_switch *ds = p->parent;
856
857 data[0] = dev->stats.tx_packets;
858 data[1] = dev->stats.tx_bytes;
859 data[2] = dev->stats.rx_packets;
860 data[3] = dev->stats.rx_bytes;
861 if (ds->ops->get_ethtool_stats)
862 ds->ops->get_ethtool_stats(ds, p->port, data + 4);
863 }
864
865 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
866 {
867 struct dsa_slave_priv *p = netdev_priv(dev);
868 struct dsa_switch *ds = p->parent;
869
870 if (sset == ETH_SS_STATS) {
871 int count;
872
873 count = 4;
874 if (ds->ops->get_sset_count)
875 count += ds->ops->get_sset_count(ds);
876
877 return count;
878 }
879
880 return -EOPNOTSUPP;
881 }
882
883 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
884 {
885 struct dsa_slave_priv *p = netdev_priv(dev);
886 struct dsa_switch *ds = p->parent;
887
888 if (ds->ops->get_wol)
889 ds->ops->get_wol(ds, p->port, w);
890 }
891
892 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
893 {
894 struct dsa_slave_priv *p = netdev_priv(dev);
895 struct dsa_switch *ds = p->parent;
896 int ret = -EOPNOTSUPP;
897
898 if (ds->ops->set_wol)
899 ret = ds->ops->set_wol(ds, p->port, w);
900
901 return ret;
902 }
903
904 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
905 {
906 struct dsa_slave_priv *p = netdev_priv(dev);
907 struct dsa_switch *ds = p->parent;
908 int ret;
909
910 if (!ds->ops->set_eee)
911 return -EOPNOTSUPP;
912
913 ret = ds->ops->set_eee(ds, p->port, p->phy, e);
914 if (ret)
915 return ret;
916
917 if (p->phy)
918 ret = phy_ethtool_set_eee(p->phy, e);
919
920 return ret;
921 }
922
923 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
924 {
925 struct dsa_slave_priv *p = netdev_priv(dev);
926 struct dsa_switch *ds = p->parent;
927 int ret;
928
929 if (!ds->ops->get_eee)
930 return -EOPNOTSUPP;
931
932 ret = ds->ops->get_eee(ds, p->port, e);
933 if (ret)
934 return ret;
935
936 if (p->phy)
937 ret = phy_ethtool_get_eee(p->phy, e);
938
939 return ret;
940 }
941
942 #ifdef CONFIG_NET_POLL_CONTROLLER
943 static int dsa_slave_netpoll_setup(struct net_device *dev,
944 struct netpoll_info *ni)
945 {
946 struct dsa_slave_priv *p = netdev_priv(dev);
947 struct dsa_switch *ds = p->parent;
948 struct net_device *master = ds->dst->master_netdev;
949 struct netpoll *netpoll;
950 int err = 0;
951
952 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
953 if (!netpoll)
954 return -ENOMEM;
955
956 err = __netpoll_setup(netpoll, master);
957 if (err) {
958 kfree(netpoll);
959 goto out;
960 }
961
962 p->netpoll = netpoll;
963 out:
964 return err;
965 }
966
967 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
968 {
969 struct dsa_slave_priv *p = netdev_priv(dev);
970 struct netpoll *netpoll = p->netpoll;
971
972 if (!netpoll)
973 return;
974
975 p->netpoll = NULL;
976
977 __netpoll_free_async(netpoll);
978 }
979
980 static void dsa_slave_poll_controller(struct net_device *dev)
981 {
982 }
983 #endif
984
985 void dsa_cpu_port_ethtool_init(struct ethtool_ops *ops)
986 {
987 ops->get_sset_count = dsa_cpu_port_get_sset_count;
988 ops->get_ethtool_stats = dsa_cpu_port_get_ethtool_stats;
989 ops->get_strings = dsa_cpu_port_get_strings;
990 }
991
992 static const struct ethtool_ops dsa_slave_ethtool_ops = {
993 .get_settings = dsa_slave_get_settings,
994 .set_settings = dsa_slave_set_settings,
995 .get_drvinfo = dsa_slave_get_drvinfo,
996 .get_regs_len = dsa_slave_get_regs_len,
997 .get_regs = dsa_slave_get_regs,
998 .nway_reset = dsa_slave_nway_reset,
999 .get_link = dsa_slave_get_link,
1000 .get_eeprom_len = dsa_slave_get_eeprom_len,
1001 .get_eeprom = dsa_slave_get_eeprom,
1002 .set_eeprom = dsa_slave_set_eeprom,
1003 .get_strings = dsa_slave_get_strings,
1004 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
1005 .get_sset_count = dsa_slave_get_sset_count,
1006 .set_wol = dsa_slave_set_wol,
1007 .get_wol = dsa_slave_get_wol,
1008 .set_eee = dsa_slave_set_eee,
1009 .get_eee = dsa_slave_get_eee,
1010 };
1011
1012 static const struct net_device_ops dsa_slave_netdev_ops = {
1013 .ndo_open = dsa_slave_open,
1014 .ndo_stop = dsa_slave_close,
1015 .ndo_start_xmit = dsa_slave_xmit,
1016 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
1017 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
1018 .ndo_set_mac_address = dsa_slave_set_mac_address,
1019 .ndo_fdb_add = switchdev_port_fdb_add,
1020 .ndo_fdb_del = switchdev_port_fdb_del,
1021 .ndo_fdb_dump = switchdev_port_fdb_dump,
1022 .ndo_do_ioctl = dsa_slave_ioctl,
1023 .ndo_get_iflink = dsa_slave_get_iflink,
1024 #ifdef CONFIG_NET_POLL_CONTROLLER
1025 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
1026 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
1027 .ndo_poll_controller = dsa_slave_poll_controller,
1028 #endif
1029 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
1030 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
1031 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
1032 };
1033
1034 static const struct switchdev_ops dsa_slave_switchdev_ops = {
1035 .switchdev_port_attr_get = dsa_slave_port_attr_get,
1036 .switchdev_port_attr_set = dsa_slave_port_attr_set,
1037 .switchdev_port_obj_add = dsa_slave_port_obj_add,
1038 .switchdev_port_obj_del = dsa_slave_port_obj_del,
1039 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
1040 };
1041
1042 static struct device_type dsa_type = {
1043 .name = "dsa",
1044 };
1045
1046 static void dsa_slave_adjust_link(struct net_device *dev)
1047 {
1048 struct dsa_slave_priv *p = netdev_priv(dev);
1049 struct dsa_switch *ds = p->parent;
1050 unsigned int status_changed = 0;
1051
1052 if (p->old_link != p->phy->link) {
1053 status_changed = 1;
1054 p->old_link = p->phy->link;
1055 }
1056
1057 if (p->old_duplex != p->phy->duplex) {
1058 status_changed = 1;
1059 p->old_duplex = p->phy->duplex;
1060 }
1061
1062 if (p->old_pause != p->phy->pause) {
1063 status_changed = 1;
1064 p->old_pause = p->phy->pause;
1065 }
1066
1067 if (ds->ops->adjust_link && status_changed)
1068 ds->ops->adjust_link(ds, p->port, p->phy);
1069
1070 if (status_changed)
1071 phy_print_status(p->phy);
1072 }
1073
1074 static int dsa_slave_fixed_link_update(struct net_device *dev,
1075 struct fixed_phy_status *status)
1076 {
1077 struct dsa_slave_priv *p;
1078 struct dsa_switch *ds;
1079
1080 if (dev) {
1081 p = netdev_priv(dev);
1082 ds = p->parent;
1083 if (ds->ops->fixed_link_update)
1084 ds->ops->fixed_link_update(ds, p->port, status);
1085 }
1086
1087 return 0;
1088 }
1089
1090 /* slave device setup *******************************************************/
1091 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
1092 struct net_device *slave_dev,
1093 int addr)
1094 {
1095 struct dsa_switch *ds = p->parent;
1096
1097 p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr);
1098 if (!p->phy) {
1099 netdev_err(slave_dev, "no phy at %d\n", addr);
1100 return -ENODEV;
1101 }
1102
1103 /* Use already configured phy mode */
1104 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1105 p->phy_interface = p->phy->interface;
1106 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
1107 p->phy_interface);
1108
1109 return 0;
1110 }
1111
1112 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
1113 struct net_device *slave_dev)
1114 {
1115 struct dsa_switch *ds = p->parent;
1116 struct device_node *phy_dn, *port_dn;
1117 bool phy_is_fixed = false;
1118 u32 phy_flags = 0;
1119 int mode, ret;
1120
1121 port_dn = ds->ports[p->port].dn;
1122 mode = of_get_phy_mode(port_dn);
1123 if (mode < 0)
1124 mode = PHY_INTERFACE_MODE_NA;
1125 p->phy_interface = mode;
1126
1127 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1128 if (!phy_dn && of_phy_is_fixed_link(port_dn)) {
1129 /* In the case of a fixed PHY, the DT node associated
1130 * to the fixed PHY is the Port DT node
1131 */
1132 ret = of_phy_register_fixed_link(port_dn);
1133 if (ret) {
1134 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
1135 return ret;
1136 }
1137 phy_is_fixed = true;
1138 phy_dn = of_node_get(port_dn);
1139 }
1140
1141 if (ds->ops->get_phy_flags)
1142 phy_flags = ds->ops->get_phy_flags(ds, p->port);
1143
1144 if (phy_dn) {
1145 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
1146
1147 /* If this PHY address is part of phys_mii_mask, which means
1148 * that we need to divert reads and writes to/from it, then we
1149 * want to bind this device using the slave MII bus created by
1150 * DSA to make that happen.
1151 */
1152 if (!phy_is_fixed && phy_id >= 0 &&
1153 (ds->phys_mii_mask & (1 << phy_id))) {
1154 ret = dsa_slave_phy_connect(p, slave_dev, phy_id);
1155 if (ret) {
1156 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret);
1157 of_node_put(phy_dn);
1158 return ret;
1159 }
1160 } else {
1161 p->phy = of_phy_connect(slave_dev, phy_dn,
1162 dsa_slave_adjust_link,
1163 phy_flags,
1164 p->phy_interface);
1165 }
1166
1167 of_node_put(phy_dn);
1168 }
1169
1170 if (p->phy && phy_is_fixed)
1171 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
1172
1173 /* We could not connect to a designated PHY, so use the switch internal
1174 * MDIO bus instead
1175 */
1176 if (!p->phy) {
1177 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
1178 if (ret) {
1179 netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret);
1180 if (phy_is_fixed)
1181 of_phy_deregister_fixed_link(port_dn);
1182 return ret;
1183 }
1184 }
1185
1186 phy_attached_info(p->phy);
1187
1188 return 0;
1189 }
1190
1191 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1192 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1193 struct netdev_queue *txq,
1194 void *_unused)
1195 {
1196 lockdep_set_class(&txq->_xmit_lock,
1197 &dsa_slave_netdev_xmit_lock_key);
1198 }
1199
1200 int dsa_slave_suspend(struct net_device *slave_dev)
1201 {
1202 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1203
1204 if (p->phy) {
1205 phy_stop(p->phy);
1206 p->old_pause = -1;
1207 p->old_link = -1;
1208 p->old_duplex = -1;
1209 phy_suspend(p->phy);
1210 }
1211
1212 return 0;
1213 }
1214
1215 int dsa_slave_resume(struct net_device *slave_dev)
1216 {
1217 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1218
1219 netif_device_attach(slave_dev);
1220
1221 if (p->phy) {
1222 phy_resume(p->phy);
1223 phy_start(p->phy);
1224 }
1225
1226 return 0;
1227 }
1228
1229 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1230 int port, const char *name)
1231 {
1232 struct dsa_switch_tree *dst = ds->dst;
1233 struct net_device *master;
1234 struct net_device *slave_dev;
1235 struct dsa_slave_priv *p;
1236 int ret;
1237
1238 master = ds->dst->master_netdev;
1239 if (ds->master_netdev)
1240 master = ds->master_netdev;
1241
1242 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1243 NET_NAME_UNKNOWN, ether_setup);
1244 if (slave_dev == NULL)
1245 return -ENOMEM;
1246
1247 slave_dev->features = master->vlan_features;
1248 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1249 eth_hw_addr_inherit(slave_dev, master);
1250 slave_dev->priv_flags |= IFF_NO_QUEUE;
1251 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1252 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1253 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1254
1255 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1256 NULL);
1257
1258 SET_NETDEV_DEV(slave_dev, parent);
1259 slave_dev->dev.of_node = ds->ports[port].dn;
1260 slave_dev->vlan_features = master->vlan_features;
1261
1262 p = netdev_priv(slave_dev);
1263 p->parent = ds;
1264 p->port = port;
1265 p->xmit = dst->tag_ops->xmit;
1266
1267 p->old_pause = -1;
1268 p->old_link = -1;
1269 p->old_duplex = -1;
1270
1271 ds->ports[port].netdev = slave_dev;
1272 ret = register_netdev(slave_dev);
1273 if (ret) {
1274 netdev_err(master, "error %d registering interface %s\n",
1275 ret, slave_dev->name);
1276 ds->ports[port].netdev = NULL;
1277 free_netdev(slave_dev);
1278 return ret;
1279 }
1280
1281 netif_carrier_off(slave_dev);
1282
1283 ret = dsa_slave_phy_setup(p, slave_dev);
1284 if (ret) {
1285 netdev_err(master, "error %d setting up slave phy\n", ret);
1286 unregister_netdev(slave_dev);
1287 free_netdev(slave_dev);
1288 return ret;
1289 }
1290
1291 return 0;
1292 }
1293
1294 void dsa_slave_destroy(struct net_device *slave_dev)
1295 {
1296 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1297 struct dsa_switch *ds = p->parent;
1298 struct device_node *port_dn;
1299
1300 port_dn = ds->ports[p->port].dn;
1301
1302 netif_carrier_off(slave_dev);
1303 if (p->phy) {
1304 phy_disconnect(p->phy);
1305
1306 if (of_phy_is_fixed_link(port_dn))
1307 of_phy_deregister_fixed_link(port_dn);
1308 }
1309 unregister_netdev(slave_dev);
1310 free_netdev(slave_dev);
1311 }
1312
1313 static bool dsa_slave_dev_check(struct net_device *dev)
1314 {
1315 return dev->netdev_ops == &dsa_slave_netdev_ops;
1316 }
1317
1318 static int dsa_slave_port_upper_event(struct net_device *dev,
1319 unsigned long event, void *ptr)
1320 {
1321 struct netdev_notifier_changeupper_info *info = ptr;
1322 struct net_device *upper = info->upper_dev;
1323 int err = 0;
1324
1325 switch (event) {
1326 case NETDEV_CHANGEUPPER:
1327 if (netif_is_bridge_master(upper)) {
1328 if (info->linking)
1329 err = dsa_slave_bridge_port_join(dev, upper);
1330 else
1331 dsa_slave_bridge_port_leave(dev);
1332 }
1333
1334 break;
1335 }
1336
1337 return notifier_from_errno(err);
1338 }
1339
1340 static int dsa_slave_port_event(struct net_device *dev, unsigned long event,
1341 void *ptr)
1342 {
1343 switch (event) {
1344 case NETDEV_CHANGEUPPER:
1345 return dsa_slave_port_upper_event(dev, event, ptr);
1346 }
1347
1348 return NOTIFY_DONE;
1349 }
1350
1351 int dsa_slave_netdevice_event(struct notifier_block *unused,
1352 unsigned long event, void *ptr)
1353 {
1354 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1355
1356 if (dsa_slave_dev_check(dev))
1357 return dsa_slave_port_event(dev, event, ptr);
1358
1359 return NOTIFY_DONE;
1360 }
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