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