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Merge tag 'trace-v4.10-rc2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rosted...
[mirror_ubuntu-artful-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_link_ksettings(struct net_device *dev,
645 struct ethtool_link_ksettings *cmd)
646 {
647 struct dsa_slave_priv *p = netdev_priv(dev);
648 int err;
649
650 err = -EOPNOTSUPP;
651 if (p->phy != NULL) {
652 err = phy_read_status(p->phy);
653 if (err == 0)
654 err = phy_ethtool_ksettings_get(p->phy, cmd);
655 }
656
657 return err;
658 }
659
660 static int
661 dsa_slave_set_link_ksettings(struct net_device *dev,
662 const struct ethtool_link_ksettings *cmd)
663 {
664 struct dsa_slave_priv *p = netdev_priv(dev);
665
666 if (p->phy != NULL)
667 return phy_ethtool_ksettings_set(p->phy, cmd);
668
669 return -EOPNOTSUPP;
670 }
671
672 static void dsa_slave_get_drvinfo(struct net_device *dev,
673 struct ethtool_drvinfo *drvinfo)
674 {
675 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
676 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
677 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
678 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
679 }
680
681 static int dsa_slave_get_regs_len(struct net_device *dev)
682 {
683 struct dsa_slave_priv *p = netdev_priv(dev);
684 struct dsa_switch *ds = p->parent;
685
686 if (ds->ops->get_regs_len)
687 return ds->ops->get_regs_len(ds, p->port);
688
689 return -EOPNOTSUPP;
690 }
691
692 static void
693 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
694 {
695 struct dsa_slave_priv *p = netdev_priv(dev);
696 struct dsa_switch *ds = p->parent;
697
698 if (ds->ops->get_regs)
699 ds->ops->get_regs(ds, p->port, regs, _p);
700 }
701
702 static int dsa_slave_nway_reset(struct net_device *dev)
703 {
704 struct dsa_slave_priv *p = netdev_priv(dev);
705
706 if (p->phy != NULL)
707 return genphy_restart_aneg(p->phy);
708
709 return -EOPNOTSUPP;
710 }
711
712 static u32 dsa_slave_get_link(struct net_device *dev)
713 {
714 struct dsa_slave_priv *p = netdev_priv(dev);
715
716 if (p->phy != NULL) {
717 genphy_update_link(p->phy);
718 return p->phy->link;
719 }
720
721 return -EOPNOTSUPP;
722 }
723
724 static int dsa_slave_get_eeprom_len(struct net_device *dev)
725 {
726 struct dsa_slave_priv *p = netdev_priv(dev);
727 struct dsa_switch *ds = p->parent;
728
729 if (ds->cd && ds->cd->eeprom_len)
730 return ds->cd->eeprom_len;
731
732 if (ds->ops->get_eeprom_len)
733 return ds->ops->get_eeprom_len(ds);
734
735 return 0;
736 }
737
738 static int dsa_slave_get_eeprom(struct net_device *dev,
739 struct ethtool_eeprom *eeprom, u8 *data)
740 {
741 struct dsa_slave_priv *p = netdev_priv(dev);
742 struct dsa_switch *ds = p->parent;
743
744 if (ds->ops->get_eeprom)
745 return ds->ops->get_eeprom(ds, eeprom, data);
746
747 return -EOPNOTSUPP;
748 }
749
750 static int dsa_slave_set_eeprom(struct net_device *dev,
751 struct ethtool_eeprom *eeprom, u8 *data)
752 {
753 struct dsa_slave_priv *p = netdev_priv(dev);
754 struct dsa_switch *ds = p->parent;
755
756 if (ds->ops->set_eeprom)
757 return ds->ops->set_eeprom(ds, eeprom, data);
758
759 return -EOPNOTSUPP;
760 }
761
762 static void dsa_slave_get_strings(struct net_device *dev,
763 uint32_t stringset, uint8_t *data)
764 {
765 struct dsa_slave_priv *p = netdev_priv(dev);
766 struct dsa_switch *ds = p->parent;
767
768 if (stringset == ETH_SS_STATS) {
769 int len = ETH_GSTRING_LEN;
770
771 strncpy(data, "tx_packets", len);
772 strncpy(data + len, "tx_bytes", len);
773 strncpy(data + 2 * len, "rx_packets", len);
774 strncpy(data + 3 * len, "rx_bytes", len);
775 if (ds->ops->get_strings)
776 ds->ops->get_strings(ds, p->port, data + 4 * len);
777 }
778 }
779
780 static void dsa_cpu_port_get_ethtool_stats(struct net_device *dev,
781 struct ethtool_stats *stats,
782 uint64_t *data)
783 {
784 struct dsa_switch_tree *dst = dev->dsa_ptr;
785 struct dsa_switch *ds = dst->ds[0];
786 s8 cpu_port = dst->cpu_port;
787 int count = 0;
788
789 if (dst->master_ethtool_ops.get_sset_count) {
790 count = dst->master_ethtool_ops.get_sset_count(dev,
791 ETH_SS_STATS);
792 dst->master_ethtool_ops.get_ethtool_stats(dev, stats, data);
793 }
794
795 if (ds->ops->get_ethtool_stats)
796 ds->ops->get_ethtool_stats(ds, cpu_port, data + count);
797 }
798
799 static int dsa_cpu_port_get_sset_count(struct net_device *dev, int sset)
800 {
801 struct dsa_switch_tree *dst = dev->dsa_ptr;
802 struct dsa_switch *ds = dst->ds[0];
803 int count = 0;
804
805 if (dst->master_ethtool_ops.get_sset_count)
806 count += dst->master_ethtool_ops.get_sset_count(dev, sset);
807
808 if (sset == ETH_SS_STATS && ds->ops->get_sset_count)
809 count += ds->ops->get_sset_count(ds);
810
811 return count;
812 }
813
814 static void dsa_cpu_port_get_strings(struct net_device *dev,
815 uint32_t stringset, uint8_t *data)
816 {
817 struct dsa_switch_tree *dst = dev->dsa_ptr;
818 struct dsa_switch *ds = dst->ds[0];
819 s8 cpu_port = dst->cpu_port;
820 int len = ETH_GSTRING_LEN;
821 int mcount = 0, count;
822 unsigned int i;
823 uint8_t pfx[4];
824 uint8_t *ndata;
825
826 snprintf(pfx, sizeof(pfx), "p%.2d", cpu_port);
827 /* We do not want to be NULL-terminated, since this is a prefix */
828 pfx[sizeof(pfx) - 1] = '_';
829
830 if (dst->master_ethtool_ops.get_sset_count) {
831 mcount = dst->master_ethtool_ops.get_sset_count(dev,
832 ETH_SS_STATS);
833 dst->master_ethtool_ops.get_strings(dev, stringset, data);
834 }
835
836 if (stringset == ETH_SS_STATS && ds->ops->get_strings) {
837 ndata = data + mcount * len;
838 /* This function copies ETH_GSTRINGS_LEN bytes, we will mangle
839 * the output after to prepend our CPU port prefix we
840 * constructed earlier
841 */
842 ds->ops->get_strings(ds, cpu_port, ndata);
843 count = ds->ops->get_sset_count(ds);
844 for (i = 0; i < count; i++) {
845 memmove(ndata + (i * len + sizeof(pfx)),
846 ndata + i * len, len - sizeof(pfx));
847 memcpy(ndata + i * len, pfx, sizeof(pfx));
848 }
849 }
850 }
851
852 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
853 struct ethtool_stats *stats,
854 uint64_t *data)
855 {
856 struct dsa_slave_priv *p = netdev_priv(dev);
857 struct dsa_switch *ds = p->parent;
858
859 data[0] = dev->stats.tx_packets;
860 data[1] = dev->stats.tx_bytes;
861 data[2] = dev->stats.rx_packets;
862 data[3] = dev->stats.rx_bytes;
863 if (ds->ops->get_ethtool_stats)
864 ds->ops->get_ethtool_stats(ds, p->port, data + 4);
865 }
866
867 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
868 {
869 struct dsa_slave_priv *p = netdev_priv(dev);
870 struct dsa_switch *ds = p->parent;
871
872 if (sset == ETH_SS_STATS) {
873 int count;
874
875 count = 4;
876 if (ds->ops->get_sset_count)
877 count += ds->ops->get_sset_count(ds);
878
879 return count;
880 }
881
882 return -EOPNOTSUPP;
883 }
884
885 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
886 {
887 struct dsa_slave_priv *p = netdev_priv(dev);
888 struct dsa_switch *ds = p->parent;
889
890 if (ds->ops->get_wol)
891 ds->ops->get_wol(ds, p->port, w);
892 }
893
894 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
895 {
896 struct dsa_slave_priv *p = netdev_priv(dev);
897 struct dsa_switch *ds = p->parent;
898 int ret = -EOPNOTSUPP;
899
900 if (ds->ops->set_wol)
901 ret = ds->ops->set_wol(ds, p->port, w);
902
903 return ret;
904 }
905
906 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
907 {
908 struct dsa_slave_priv *p = netdev_priv(dev);
909 struct dsa_switch *ds = p->parent;
910 int ret;
911
912 if (!ds->ops->set_eee)
913 return -EOPNOTSUPP;
914
915 ret = ds->ops->set_eee(ds, p->port, p->phy, e);
916 if (ret)
917 return ret;
918
919 if (p->phy)
920 ret = phy_ethtool_set_eee(p->phy, e);
921
922 return ret;
923 }
924
925 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
926 {
927 struct dsa_slave_priv *p = netdev_priv(dev);
928 struct dsa_switch *ds = p->parent;
929 int ret;
930
931 if (!ds->ops->get_eee)
932 return -EOPNOTSUPP;
933
934 ret = ds->ops->get_eee(ds, p->port, e);
935 if (ret)
936 return ret;
937
938 if (p->phy)
939 ret = phy_ethtool_get_eee(p->phy, e);
940
941 return ret;
942 }
943
944 #ifdef CONFIG_NET_POLL_CONTROLLER
945 static int dsa_slave_netpoll_setup(struct net_device *dev,
946 struct netpoll_info *ni)
947 {
948 struct dsa_slave_priv *p = netdev_priv(dev);
949 struct dsa_switch *ds = p->parent;
950 struct net_device *master = ds->dst->master_netdev;
951 struct netpoll *netpoll;
952 int err = 0;
953
954 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
955 if (!netpoll)
956 return -ENOMEM;
957
958 err = __netpoll_setup(netpoll, master);
959 if (err) {
960 kfree(netpoll);
961 goto out;
962 }
963
964 p->netpoll = netpoll;
965 out:
966 return err;
967 }
968
969 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
970 {
971 struct dsa_slave_priv *p = netdev_priv(dev);
972 struct netpoll *netpoll = p->netpoll;
973
974 if (!netpoll)
975 return;
976
977 p->netpoll = NULL;
978
979 __netpoll_free_async(netpoll);
980 }
981
982 static void dsa_slave_poll_controller(struct net_device *dev)
983 {
984 }
985 #endif
986
987 void dsa_cpu_port_ethtool_init(struct ethtool_ops *ops)
988 {
989 ops->get_sset_count = dsa_cpu_port_get_sset_count;
990 ops->get_ethtool_stats = dsa_cpu_port_get_ethtool_stats;
991 ops->get_strings = dsa_cpu_port_get_strings;
992 }
993
994 static const struct ethtool_ops dsa_slave_ethtool_ops = {
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 .get_link_ksettings = dsa_slave_get_link_ksettings,
1011 .set_link_ksettings = dsa_slave_set_link_ksettings,
1012 };
1013
1014 static const struct net_device_ops dsa_slave_netdev_ops = {
1015 .ndo_open = dsa_slave_open,
1016 .ndo_stop = dsa_slave_close,
1017 .ndo_start_xmit = dsa_slave_xmit,
1018 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
1019 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
1020 .ndo_set_mac_address = dsa_slave_set_mac_address,
1021 .ndo_fdb_add = switchdev_port_fdb_add,
1022 .ndo_fdb_del = switchdev_port_fdb_del,
1023 .ndo_fdb_dump = switchdev_port_fdb_dump,
1024 .ndo_do_ioctl = dsa_slave_ioctl,
1025 .ndo_get_iflink = dsa_slave_get_iflink,
1026 #ifdef CONFIG_NET_POLL_CONTROLLER
1027 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
1028 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
1029 .ndo_poll_controller = dsa_slave_poll_controller,
1030 #endif
1031 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
1032 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
1033 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
1034 };
1035
1036 static const struct switchdev_ops dsa_slave_switchdev_ops = {
1037 .switchdev_port_attr_get = dsa_slave_port_attr_get,
1038 .switchdev_port_attr_set = dsa_slave_port_attr_set,
1039 .switchdev_port_obj_add = dsa_slave_port_obj_add,
1040 .switchdev_port_obj_del = dsa_slave_port_obj_del,
1041 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
1042 };
1043
1044 static struct device_type dsa_type = {
1045 .name = "dsa",
1046 };
1047
1048 static void dsa_slave_adjust_link(struct net_device *dev)
1049 {
1050 struct dsa_slave_priv *p = netdev_priv(dev);
1051 struct dsa_switch *ds = p->parent;
1052 unsigned int status_changed = 0;
1053
1054 if (p->old_link != p->phy->link) {
1055 status_changed = 1;
1056 p->old_link = p->phy->link;
1057 }
1058
1059 if (p->old_duplex != p->phy->duplex) {
1060 status_changed = 1;
1061 p->old_duplex = p->phy->duplex;
1062 }
1063
1064 if (p->old_pause != p->phy->pause) {
1065 status_changed = 1;
1066 p->old_pause = p->phy->pause;
1067 }
1068
1069 if (ds->ops->adjust_link && status_changed)
1070 ds->ops->adjust_link(ds, p->port, p->phy);
1071
1072 if (status_changed)
1073 phy_print_status(p->phy);
1074 }
1075
1076 static int dsa_slave_fixed_link_update(struct net_device *dev,
1077 struct fixed_phy_status *status)
1078 {
1079 struct dsa_slave_priv *p;
1080 struct dsa_switch *ds;
1081
1082 if (dev) {
1083 p = netdev_priv(dev);
1084 ds = p->parent;
1085 if (ds->ops->fixed_link_update)
1086 ds->ops->fixed_link_update(ds, p->port, status);
1087 }
1088
1089 return 0;
1090 }
1091
1092 /* slave device setup *******************************************************/
1093 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
1094 struct net_device *slave_dev,
1095 int addr)
1096 {
1097 struct dsa_switch *ds = p->parent;
1098
1099 p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr);
1100 if (!p->phy) {
1101 netdev_err(slave_dev, "no phy at %d\n", addr);
1102 return -ENODEV;
1103 }
1104
1105 /* Use already configured phy mode */
1106 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1107 p->phy_interface = p->phy->interface;
1108 return phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
1109 p->phy_interface);
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 netif_device_detach(slave_dev);
1205
1206 if (p->phy) {
1207 phy_stop(p->phy);
1208 p->old_pause = -1;
1209 p->old_link = -1;
1210 p->old_duplex = -1;
1211 phy_suspend(p->phy);
1212 }
1213
1214 return 0;
1215 }
1216
1217 int dsa_slave_resume(struct net_device *slave_dev)
1218 {
1219 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1220
1221 netif_device_attach(slave_dev);
1222
1223 if (p->phy) {
1224 phy_resume(p->phy);
1225 phy_start(p->phy);
1226 }
1227
1228 return 0;
1229 }
1230
1231 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1232 int port, const char *name)
1233 {
1234 struct dsa_switch_tree *dst = ds->dst;
1235 struct net_device *master;
1236 struct net_device *slave_dev;
1237 struct dsa_slave_priv *p;
1238 int ret;
1239
1240 master = ds->dst->master_netdev;
1241 if (ds->master_netdev)
1242 master = ds->master_netdev;
1243
1244 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1245 NET_NAME_UNKNOWN, ether_setup);
1246 if (slave_dev == NULL)
1247 return -ENOMEM;
1248
1249 slave_dev->features = master->vlan_features;
1250 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1251 eth_hw_addr_inherit(slave_dev, master);
1252 slave_dev->priv_flags |= IFF_NO_QUEUE;
1253 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1254 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1255 slave_dev->min_mtu = 0;
1256 slave_dev->max_mtu = ETH_MAX_MTU;
1257 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1258
1259 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1260 NULL);
1261
1262 SET_NETDEV_DEV(slave_dev, parent);
1263 slave_dev->dev.of_node = ds->ports[port].dn;
1264 slave_dev->vlan_features = master->vlan_features;
1265
1266 p = netdev_priv(slave_dev);
1267 p->parent = ds;
1268 p->port = port;
1269 p->xmit = dst->tag_ops->xmit;
1270
1271 p->old_pause = -1;
1272 p->old_link = -1;
1273 p->old_duplex = -1;
1274
1275 ds->ports[port].netdev = slave_dev;
1276 ret = register_netdev(slave_dev);
1277 if (ret) {
1278 netdev_err(master, "error %d registering interface %s\n",
1279 ret, slave_dev->name);
1280 ds->ports[port].netdev = NULL;
1281 free_netdev(slave_dev);
1282 return ret;
1283 }
1284
1285 netif_carrier_off(slave_dev);
1286
1287 ret = dsa_slave_phy_setup(p, slave_dev);
1288 if (ret) {
1289 netdev_err(master, "error %d setting up slave phy\n", ret);
1290 unregister_netdev(slave_dev);
1291 free_netdev(slave_dev);
1292 return ret;
1293 }
1294
1295 return 0;
1296 }
1297
1298 void dsa_slave_destroy(struct net_device *slave_dev)
1299 {
1300 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1301 struct dsa_switch *ds = p->parent;
1302 struct device_node *port_dn;
1303
1304 port_dn = ds->ports[p->port].dn;
1305
1306 netif_carrier_off(slave_dev);
1307 if (p->phy) {
1308 phy_disconnect(p->phy);
1309
1310 if (of_phy_is_fixed_link(port_dn))
1311 of_phy_deregister_fixed_link(port_dn);
1312 }
1313 unregister_netdev(slave_dev);
1314 free_netdev(slave_dev);
1315 }
1316
1317 static bool dsa_slave_dev_check(struct net_device *dev)
1318 {
1319 return dev->netdev_ops == &dsa_slave_netdev_ops;
1320 }
1321
1322 static int dsa_slave_port_upper_event(struct net_device *dev,
1323 unsigned long event, void *ptr)
1324 {
1325 struct netdev_notifier_changeupper_info *info = ptr;
1326 struct net_device *upper = info->upper_dev;
1327 int err = 0;
1328
1329 switch (event) {
1330 case NETDEV_CHANGEUPPER:
1331 if (netif_is_bridge_master(upper)) {
1332 if (info->linking)
1333 err = dsa_slave_bridge_port_join(dev, upper);
1334 else
1335 dsa_slave_bridge_port_leave(dev);
1336 }
1337
1338 break;
1339 }
1340
1341 return notifier_from_errno(err);
1342 }
1343
1344 static int dsa_slave_port_event(struct net_device *dev, unsigned long event,
1345 void *ptr)
1346 {
1347 switch (event) {
1348 case NETDEV_CHANGEUPPER:
1349 return dsa_slave_port_upper_event(dev, event, ptr);
1350 }
1351
1352 return NOTIFY_DONE;
1353 }
1354
1355 int dsa_slave_netdevice_event(struct notifier_block *unused,
1356 unsigned long event, void *ptr)
1357 {
1358 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1359
1360 if (dsa_slave_dev_check(dev))
1361 return dsa_slave_port_event(dev, event, ptr);
1362
1363 return NOTIFY_DONE;
1364 }
Ubuntu Artful kernel mirror