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net: dsa: refine netdev event notifier
[linux-2.6/btrfs-unstable.git] / net / dsa / slave.c
bloba575f0350d5a01d8699bcad32eb61a5ff33364f7
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->drv->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->drv->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:%.2x",
53 ds->index, ds->pd->sw_addr);
54 ds->slave_mii_bus->parent = ds->master_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->drv->port_enable) {
102 err = ds->drv->port_enable(ds, p->port, p->phy);
103 if (err)
104 goto clear_promisc;
105 }
106
107 if (ds->drv->port_stp_update)
108 ds->drv->port_stp_update(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->drv->port_disable)
148 ds->drv->port_disable(ds, p->port, p->phy);
149
150 if (ds->drv->port_stp_update)
151 ds->drv->port_stp_update(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 int err;
211
212 if (switchdev_trans_ph_prepare(trans)) {
213 if (!ds->drv->port_vlan_prepare || !ds->drv->port_vlan_add)
214 return -EOPNOTSUPP;
215
216 err = ds->drv->port_vlan_prepare(ds, p->port, vlan, trans);
217 if (err)
218 return err;
219 } else {
220 err = ds->drv->port_vlan_add(ds, p->port, vlan, trans);
221 if (err)
222 return err;
223 }
224
225 return 0;
226 }
227
228 static int dsa_slave_port_vlan_del(struct net_device *dev,
229 const struct switchdev_obj_port_vlan *vlan)
230 {
231 struct dsa_slave_priv *p = netdev_priv(dev);
232 struct dsa_switch *ds = p->parent;
233
234 if (!ds->drv->port_vlan_del)
235 return -EOPNOTSUPP;
236
237 return ds->drv->port_vlan_del(ds, p->port, vlan);
238 }
239
240 static int dsa_slave_port_vlan_dump(struct net_device *dev,
241 struct switchdev_obj_port_vlan *vlan,
242 switchdev_obj_dump_cb_t *cb)
243 {
244 struct dsa_slave_priv *p = netdev_priv(dev);
245 struct dsa_switch *ds = p->parent;
246
247 if (ds->drv->port_vlan_dump)
248 return ds->drv->port_vlan_dump(ds, p->port, vlan, cb);
249
250 return -EOPNOTSUPP;
251 }
252
253 static int dsa_slave_port_fdb_add(struct net_device *dev,
254 const struct switchdev_obj_port_fdb *fdb,
255 struct switchdev_trans *trans)
256 {
257 struct dsa_slave_priv *p = netdev_priv(dev);
258 struct dsa_switch *ds = p->parent;
259 int ret;
260
261 if (!ds->drv->port_fdb_prepare || !ds->drv->port_fdb_add)
262 return -EOPNOTSUPP;
263
264 if (switchdev_trans_ph_prepare(trans))
265 ret = ds->drv->port_fdb_prepare(ds, p->port, fdb, trans);
266 else
267 ret = ds->drv->port_fdb_add(ds, p->port, fdb, trans);
268
269 return ret;
270 }
271
272 static int dsa_slave_port_fdb_del(struct net_device *dev,
273 const struct switchdev_obj_port_fdb *fdb)
274 {
275 struct dsa_slave_priv *p = netdev_priv(dev);
276 struct dsa_switch *ds = p->parent;
277 int ret = -EOPNOTSUPP;
278
279 if (ds->drv->port_fdb_del)
280 ret = ds->drv->port_fdb_del(ds, p->port, fdb);
281
282 return ret;
283 }
284
285 static int dsa_slave_port_fdb_dump(struct net_device *dev,
286 struct switchdev_obj_port_fdb *fdb,
287 switchdev_obj_dump_cb_t *cb)
288 {
289 struct dsa_slave_priv *p = netdev_priv(dev);
290 struct dsa_switch *ds = p->parent;
291
292 if (ds->drv->port_fdb_dump)
293 return ds->drv->port_fdb_dump(ds, p->port, fdb, cb);
294
295 return -EOPNOTSUPP;
296 }
297
298 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
299 {
300 struct dsa_slave_priv *p = netdev_priv(dev);
301
302 if (p->phy != NULL)
303 return phy_mii_ioctl(p->phy, ifr, cmd);
304
305 return -EOPNOTSUPP;
306 }
307
308 static int dsa_slave_stp_update(struct net_device *dev, u8 state)
309 {
310 struct dsa_slave_priv *p = netdev_priv(dev);
311 struct dsa_switch *ds = p->parent;
312 int ret = -EOPNOTSUPP;
313
314 if (ds->drv->port_stp_update)
315 ret = ds->drv->port_stp_update(ds, p->port, state);
316
317 return ret;
318 }
319
320 static int dsa_slave_vlan_filtering(struct net_device *dev,
321 const struct switchdev_attr *attr,
322 struct switchdev_trans *trans)
323 {
324 struct dsa_slave_priv *p = netdev_priv(dev);
325 struct dsa_switch *ds = p->parent;
326
327 /* bridge skips -EOPNOTSUPP, so skip the prepare phase */
328 if (switchdev_trans_ph_prepare(trans))
329 return 0;
330
331 if (ds->drv->port_vlan_filtering)
332 return ds->drv->port_vlan_filtering(ds, p->port,
333 attr->u.vlan_filtering);
334
335 return 0;
336 }
337
338 static int dsa_slave_port_attr_set(struct net_device *dev,
339 const struct switchdev_attr *attr,
340 struct switchdev_trans *trans)
341 {
342 struct dsa_slave_priv *p = netdev_priv(dev);
343 struct dsa_switch *ds = p->parent;
344 int ret;
345
346 switch (attr->id) {
347 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
348 if (switchdev_trans_ph_prepare(trans))
349 ret = ds->drv->port_stp_update ? 0 : -EOPNOTSUPP;
350 else
351 ret = ds->drv->port_stp_update(ds, p->port,
352 attr->u.stp_state);
353 break;
354 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
355 ret = dsa_slave_vlan_filtering(dev, attr, trans);
356 break;
357 default:
358 ret = -EOPNOTSUPP;
359 break;
360 }
361
362 return ret;
363 }
364
365 static int dsa_slave_port_obj_add(struct net_device *dev,
366 const struct switchdev_obj *obj,
367 struct switchdev_trans *trans)
368 {
369 int err;
370
371 /* For the prepare phase, ensure the full set of changes is feasable in
372 * one go in order to signal a failure properly. If an operation is not
373 * supported, return -EOPNOTSUPP.
374 */
375
376 switch (obj->id) {
377 case SWITCHDEV_OBJ_ID_PORT_FDB:
378 err = dsa_slave_port_fdb_add(dev,
379 SWITCHDEV_OBJ_PORT_FDB(obj),
380 trans);
381 break;
382 case SWITCHDEV_OBJ_ID_PORT_VLAN:
383 err = dsa_slave_port_vlan_add(dev,
384 SWITCHDEV_OBJ_PORT_VLAN(obj),
385 trans);
386 break;
387 default:
388 err = -EOPNOTSUPP;
389 break;
390 }
391
392 return err;
393 }
394
395 static int dsa_slave_port_obj_del(struct net_device *dev,
396 const struct switchdev_obj *obj)
397 {
398 int err;
399
400 switch (obj->id) {
401 case SWITCHDEV_OBJ_ID_PORT_FDB:
402 err = dsa_slave_port_fdb_del(dev,
403 SWITCHDEV_OBJ_PORT_FDB(obj));
404 break;
405 case SWITCHDEV_OBJ_ID_PORT_VLAN:
406 err = dsa_slave_port_vlan_del(dev,
407 SWITCHDEV_OBJ_PORT_VLAN(obj));
408 break;
409 default:
410 err = -EOPNOTSUPP;
411 break;
412 }
413
414 return err;
415 }
416
417 static int dsa_slave_port_obj_dump(struct net_device *dev,
418 struct switchdev_obj *obj,
419 switchdev_obj_dump_cb_t *cb)
420 {
421 int err;
422
423 switch (obj->id) {
424 case SWITCHDEV_OBJ_ID_PORT_FDB:
425 err = dsa_slave_port_fdb_dump(dev,
426 SWITCHDEV_OBJ_PORT_FDB(obj),
427 cb);
428 break;
429 case SWITCHDEV_OBJ_ID_PORT_VLAN:
430 err = dsa_slave_port_vlan_dump(dev,
431 SWITCHDEV_OBJ_PORT_VLAN(obj),
432 cb);
433 break;
434 default:
435 err = -EOPNOTSUPP;
436 break;
437 }
438
439 return err;
440 }
441
442 static int dsa_slave_bridge_port_join(struct net_device *dev,
443 struct net_device *br)
444 {
445 struct dsa_slave_priv *p = netdev_priv(dev);
446 struct dsa_switch *ds = p->parent;
447 int ret = -EOPNOTSUPP;
448
449 p->bridge_dev = br;
450
451 if (ds->drv->port_bridge_join)
452 ret = ds->drv->port_bridge_join(ds, p->port, br);
453
454 return ret == -EOPNOTSUPP ? 0 : ret;
455 }
456
457 static void dsa_slave_bridge_port_leave(struct net_device *dev)
458 {
459 struct dsa_slave_priv *p = netdev_priv(dev);
460 struct dsa_switch *ds = p->parent;
461
462
463 if (ds->drv->port_bridge_leave)
464 ds->drv->port_bridge_leave(ds, p->port);
465
466 p->bridge_dev = NULL;
467
468 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
469 * so allow it to be in BR_STATE_FORWARDING to be kept functional
470 */
471 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
472 }
473
474 static int dsa_slave_port_attr_get(struct net_device *dev,
475 struct switchdev_attr *attr)
476 {
477 struct dsa_slave_priv *p = netdev_priv(dev);
478 struct dsa_switch *ds = p->parent;
479
480 switch (attr->id) {
481 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
482 attr->u.ppid.id_len = sizeof(ds->index);
483 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
484 break;
485 default:
486 return -EOPNOTSUPP;
487 }
488
489 return 0;
490 }
491
492 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
493 struct sk_buff *skb)
494 {
495 #ifdef CONFIG_NET_POLL_CONTROLLER
496 if (p->netpoll)
497 netpoll_send_skb(p->netpoll, skb);
498 #else
499 BUG();
500 #endif
501 return NETDEV_TX_OK;
502 }
503
504 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
505 {
506 struct dsa_slave_priv *p = netdev_priv(dev);
507 struct sk_buff *nskb;
508
509 dev->stats.tx_packets++;
510 dev->stats.tx_bytes += skb->len;
511
512 /* Transmit function may have to reallocate the original SKB */
513 nskb = p->xmit(skb, dev);
514 if (!nskb)
515 return NETDEV_TX_OK;
516
517 /* SKB for netpoll still need to be mangled with the protocol-specific
518 * tag to be successfully transmitted
519 */
520 if (unlikely(netpoll_tx_running(dev)))
521 return dsa_netpoll_send_skb(p, nskb);
522
523 /* Queue the SKB for transmission on the parent interface, but
524 * do not modify its EtherType
525 */
526 nskb->dev = p->parent->dst->master_netdev;
527 dev_queue_xmit(nskb);
528
529 return NETDEV_TX_OK;
530 }
531
532 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
533 struct net_device *dev)
534 {
535 /* Just return the original SKB */
536 return skb;
537 }
538
539
540 /* ethtool operations *******************************************************/
541 static int
542 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
543 {
544 struct dsa_slave_priv *p = netdev_priv(dev);
545 int err;
546
547 err = -EOPNOTSUPP;
548 if (p->phy != NULL) {
549 err = phy_read_status(p->phy);
550 if (err == 0)
551 err = phy_ethtool_gset(p->phy, cmd);
552 }
553
554 return err;
555 }
556
557 static int
558 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
559 {
560 struct dsa_slave_priv *p = netdev_priv(dev);
561
562 if (p->phy != NULL)
563 return phy_ethtool_sset(p->phy, cmd);
564
565 return -EOPNOTSUPP;
566 }
567
568 static void dsa_slave_get_drvinfo(struct net_device *dev,
569 struct ethtool_drvinfo *drvinfo)
570 {
571 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
572 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
573 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
574 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
575 }
576
577 static int dsa_slave_get_regs_len(struct net_device *dev)
578 {
579 struct dsa_slave_priv *p = netdev_priv(dev);
580 struct dsa_switch *ds = p->parent;
581
582 if (ds->drv->get_regs_len)
583 return ds->drv->get_regs_len(ds, p->port);
584
585 return -EOPNOTSUPP;
586 }
587
588 static void
589 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
590 {
591 struct dsa_slave_priv *p = netdev_priv(dev);
592 struct dsa_switch *ds = p->parent;
593
594 if (ds->drv->get_regs)
595 ds->drv->get_regs(ds, p->port, regs, _p);
596 }
597
598 static int dsa_slave_nway_reset(struct net_device *dev)
599 {
600 struct dsa_slave_priv *p = netdev_priv(dev);
601
602 if (p->phy != NULL)
603 return genphy_restart_aneg(p->phy);
604
605 return -EOPNOTSUPP;
606 }
607
608 static u32 dsa_slave_get_link(struct net_device *dev)
609 {
610 struct dsa_slave_priv *p = netdev_priv(dev);
611
612 if (p->phy != NULL) {
613 genphy_update_link(p->phy);
614 return p->phy->link;
615 }
616
617 return -EOPNOTSUPP;
618 }
619
620 static int dsa_slave_get_eeprom_len(struct net_device *dev)
621 {
622 struct dsa_slave_priv *p = netdev_priv(dev);
623 struct dsa_switch *ds = p->parent;
624
625 if (ds->pd->eeprom_len)
626 return ds->pd->eeprom_len;
627
628 if (ds->drv->get_eeprom_len)
629 return ds->drv->get_eeprom_len(ds);
630
631 return 0;
632 }
633
634 static int dsa_slave_get_eeprom(struct net_device *dev,
635 struct ethtool_eeprom *eeprom, u8 *data)
636 {
637 struct dsa_slave_priv *p = netdev_priv(dev);
638 struct dsa_switch *ds = p->parent;
639
640 if (ds->drv->get_eeprom)
641 return ds->drv->get_eeprom(ds, eeprom, data);
642
643 return -EOPNOTSUPP;
644 }
645
646 static int dsa_slave_set_eeprom(struct net_device *dev,
647 struct ethtool_eeprom *eeprom, u8 *data)
648 {
649 struct dsa_slave_priv *p = netdev_priv(dev);
650 struct dsa_switch *ds = p->parent;
651
652 if (ds->drv->set_eeprom)
653 return ds->drv->set_eeprom(ds, eeprom, data);
654
655 return -EOPNOTSUPP;
656 }
657
658 static void dsa_slave_get_strings(struct net_device *dev,
659 uint32_t stringset, uint8_t *data)
660 {
661 struct dsa_slave_priv *p = netdev_priv(dev);
662 struct dsa_switch *ds = p->parent;
663
664 if (stringset == ETH_SS_STATS) {
665 int len = ETH_GSTRING_LEN;
666
667 strncpy(data, "tx_packets", len);
668 strncpy(data + len, "tx_bytes", len);
669 strncpy(data + 2 * len, "rx_packets", len);
670 strncpy(data + 3 * len, "rx_bytes", len);
671 if (ds->drv->get_strings != NULL)
672 ds->drv->get_strings(ds, p->port, data + 4 * len);
673 }
674 }
675
676 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
677 struct ethtool_stats *stats,
678 uint64_t *data)
679 {
680 struct dsa_slave_priv *p = netdev_priv(dev);
681 struct dsa_switch *ds = p->parent;
682
683 data[0] = p->dev->stats.tx_packets;
684 data[1] = p->dev->stats.tx_bytes;
685 data[2] = p->dev->stats.rx_packets;
686 data[3] = p->dev->stats.rx_bytes;
687 if (ds->drv->get_ethtool_stats != NULL)
688 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
689 }
690
691 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
692 {
693 struct dsa_slave_priv *p = netdev_priv(dev);
694 struct dsa_switch *ds = p->parent;
695
696 if (sset == ETH_SS_STATS) {
697 int count;
698
699 count = 4;
700 if (ds->drv->get_sset_count != NULL)
701 count += ds->drv->get_sset_count(ds);
702
703 return count;
704 }
705
706 return -EOPNOTSUPP;
707 }
708
709 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
710 {
711 struct dsa_slave_priv *p = netdev_priv(dev);
712 struct dsa_switch *ds = p->parent;
713
714 if (ds->drv->get_wol)
715 ds->drv->get_wol(ds, p->port, w);
716 }
717
718 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
719 {
720 struct dsa_slave_priv *p = netdev_priv(dev);
721 struct dsa_switch *ds = p->parent;
722 int ret = -EOPNOTSUPP;
723
724 if (ds->drv->set_wol)
725 ret = ds->drv->set_wol(ds, p->port, w);
726
727 return ret;
728 }
729
730 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
731 {
732 struct dsa_slave_priv *p = netdev_priv(dev);
733 struct dsa_switch *ds = p->parent;
734 int ret;
735
736 if (!ds->drv->set_eee)
737 return -EOPNOTSUPP;
738
739 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
740 if (ret)
741 return ret;
742
743 if (p->phy)
744 ret = phy_ethtool_set_eee(p->phy, e);
745
746 return ret;
747 }
748
749 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
750 {
751 struct dsa_slave_priv *p = netdev_priv(dev);
752 struct dsa_switch *ds = p->parent;
753 int ret;
754
755 if (!ds->drv->get_eee)
756 return -EOPNOTSUPP;
757
758 ret = ds->drv->get_eee(ds, p->port, e);
759 if (ret)
760 return ret;
761
762 if (p->phy)
763 ret = phy_ethtool_get_eee(p->phy, e);
764
765 return ret;
766 }
767
768 #ifdef CONFIG_NET_POLL_CONTROLLER
769 static int dsa_slave_netpoll_setup(struct net_device *dev,
770 struct netpoll_info *ni)
771 {
772 struct dsa_slave_priv *p = netdev_priv(dev);
773 struct dsa_switch *ds = p->parent;
774 struct net_device *master = ds->dst->master_netdev;
775 struct netpoll *netpoll;
776 int err = 0;
777
778 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
779 if (!netpoll)
780 return -ENOMEM;
781
782 err = __netpoll_setup(netpoll, master);
783 if (err) {
784 kfree(netpoll);
785 goto out;
786 }
787
788 p->netpoll = netpoll;
789 out:
790 return err;
791 }
792
793 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
794 {
795 struct dsa_slave_priv *p = netdev_priv(dev);
796 struct netpoll *netpoll = p->netpoll;
797
798 if (!netpoll)
799 return;
800
801 p->netpoll = NULL;
802
803 __netpoll_free_async(netpoll);
804 }
805
806 static void dsa_slave_poll_controller(struct net_device *dev)
807 {
808 }
809 #endif
810
811 static const struct ethtool_ops dsa_slave_ethtool_ops = {
812 .get_settings = dsa_slave_get_settings,
813 .set_settings = dsa_slave_set_settings,
814 .get_drvinfo = dsa_slave_get_drvinfo,
815 .get_regs_len = dsa_slave_get_regs_len,
816 .get_regs = dsa_slave_get_regs,
817 .nway_reset = dsa_slave_nway_reset,
818 .get_link = dsa_slave_get_link,
819 .get_eeprom_len = dsa_slave_get_eeprom_len,
820 .get_eeprom = dsa_slave_get_eeprom,
821 .set_eeprom = dsa_slave_set_eeprom,
822 .get_strings = dsa_slave_get_strings,
823 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
824 .get_sset_count = dsa_slave_get_sset_count,
825 .set_wol = dsa_slave_set_wol,
826 .get_wol = dsa_slave_get_wol,
827 .set_eee = dsa_slave_set_eee,
828 .get_eee = dsa_slave_get_eee,
829 };
830
831 static const struct net_device_ops dsa_slave_netdev_ops = {
832 .ndo_open = dsa_slave_open,
833 .ndo_stop = dsa_slave_close,
834 .ndo_start_xmit = dsa_slave_xmit,
835 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
836 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
837 .ndo_set_mac_address = dsa_slave_set_mac_address,
838 .ndo_fdb_add = switchdev_port_fdb_add,
839 .ndo_fdb_del = switchdev_port_fdb_del,
840 .ndo_fdb_dump = switchdev_port_fdb_dump,
841 .ndo_do_ioctl = dsa_slave_ioctl,
842 .ndo_get_iflink = dsa_slave_get_iflink,
843 #ifdef CONFIG_NET_POLL_CONTROLLER
844 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
845 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
846 .ndo_poll_controller = dsa_slave_poll_controller,
847 #endif
848 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
849 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
850 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
851 };
852
853 static const struct switchdev_ops dsa_slave_switchdev_ops = {
854 .switchdev_port_attr_get = dsa_slave_port_attr_get,
855 .switchdev_port_attr_set = dsa_slave_port_attr_set,
856 .switchdev_port_obj_add = dsa_slave_port_obj_add,
857 .switchdev_port_obj_del = dsa_slave_port_obj_del,
858 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
859 };
860
861 static struct device_type dsa_type = {
862 .name = "dsa",
863 };
864
865 static void dsa_slave_adjust_link(struct net_device *dev)
866 {
867 struct dsa_slave_priv *p = netdev_priv(dev);
868 struct dsa_switch *ds = p->parent;
869 unsigned int status_changed = 0;
870
871 if (p->old_link != p->phy->link) {
872 status_changed = 1;
873 p->old_link = p->phy->link;
874 }
875
876 if (p->old_duplex != p->phy->duplex) {
877 status_changed = 1;
878 p->old_duplex = p->phy->duplex;
879 }
880
881 if (p->old_pause != p->phy->pause) {
882 status_changed = 1;
883 p->old_pause = p->phy->pause;
884 }
885
886 if (ds->drv->adjust_link && status_changed)
887 ds->drv->adjust_link(ds, p->port, p->phy);
888
889 if (status_changed)
890 phy_print_status(p->phy);
891 }
892
893 static int dsa_slave_fixed_link_update(struct net_device *dev,
894 struct fixed_phy_status *status)
895 {
896 struct dsa_slave_priv *p;
897 struct dsa_switch *ds;
898
899 if (dev) {
900 p = netdev_priv(dev);
901 ds = p->parent;
902 if (ds->drv->fixed_link_update)
903 ds->drv->fixed_link_update(ds, p->port, status);
904 }
905
906 return 0;
907 }
908
909 /* slave device setup *******************************************************/
910 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
911 struct net_device *slave_dev,
912 int addr)
913 {
914 struct dsa_switch *ds = p->parent;
915
916 p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr);
917 if (!p->phy) {
918 netdev_err(slave_dev, "no phy at %d\n", addr);
919 return -ENODEV;
920 }
921
922 /* Use already configured phy mode */
923 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
924 p->phy_interface = p->phy->interface;
925 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
926 p->phy_interface);
927
928 return 0;
929 }
930
931 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
932 struct net_device *slave_dev)
933 {
934 struct dsa_switch *ds = p->parent;
935 struct dsa_chip_data *cd = ds->pd;
936 struct device_node *phy_dn, *port_dn;
937 bool phy_is_fixed = false;
938 u32 phy_flags = 0;
939 int mode, ret;
940
941 port_dn = cd->port_dn[p->port];
942 mode = of_get_phy_mode(port_dn);
943 if (mode < 0)
944 mode = PHY_INTERFACE_MODE_NA;
945 p->phy_interface = mode;
946
947 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
948 if (of_phy_is_fixed_link(port_dn)) {
949 /* In the case of a fixed PHY, the DT node associated
950 * to the fixed PHY is the Port DT node
951 */
952 ret = of_phy_register_fixed_link(port_dn);
953 if (ret) {
954 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
955 return ret;
956 }
957 phy_is_fixed = true;
958 phy_dn = port_dn;
959 }
960
961 if (ds->drv->get_phy_flags)
962 phy_flags = ds->drv->get_phy_flags(ds, p->port);
963
964 if (phy_dn) {
965 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
966
967 /* If this PHY address is part of phys_mii_mask, which means
968 * that we need to divert reads and writes to/from it, then we
969 * want to bind this device using the slave MII bus created by
970 * DSA to make that happen.
971 */
972 if (!phy_is_fixed && phy_id >= 0 &&
973 (ds->phys_mii_mask & (1 << phy_id))) {
974 ret = dsa_slave_phy_connect(p, slave_dev, phy_id);
975 if (ret) {
976 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret);
977 return ret;
978 }
979 } else {
980 p->phy = of_phy_connect(slave_dev, phy_dn,
981 dsa_slave_adjust_link,
982 phy_flags,
983 p->phy_interface);
984 }
985 }
986
987 if (p->phy && phy_is_fixed)
988 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
989
990 /* We could not connect to a designated PHY, so use the switch internal
991 * MDIO bus instead
992 */
993 if (!p->phy) {
994 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
995 if (ret) {
996 netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret);
997 return ret;
998 }
999 }
1000
1001 phy_attached_info(p->phy);
1002
1003 return 0;
1004 }
1005
1006 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1007 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1008 struct netdev_queue *txq,
1009 void *_unused)
1010 {
1011 lockdep_set_class(&txq->_xmit_lock,
1012 &dsa_slave_netdev_xmit_lock_key);
1013 }
1014
1015 int dsa_slave_suspend(struct net_device *slave_dev)
1016 {
1017 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1018
1019 if (p->phy) {
1020 phy_stop(p->phy);
1021 p->old_pause = -1;
1022 p->old_link = -1;
1023 p->old_duplex = -1;
1024 phy_suspend(p->phy);
1025 }
1026
1027 return 0;
1028 }
1029
1030 int dsa_slave_resume(struct net_device *slave_dev)
1031 {
1032 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1033
1034 netif_device_attach(slave_dev);
1035
1036 if (p->phy) {
1037 phy_resume(p->phy);
1038 phy_start(p->phy);
1039 }
1040
1041 return 0;
1042 }
1043
1044 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1045 int port, char *name)
1046 {
1047 struct net_device *master = ds->dst->master_netdev;
1048 struct net_device *slave_dev;
1049 struct dsa_slave_priv *p;
1050 int ret;
1051
1052 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1053 NET_NAME_UNKNOWN, ether_setup);
1054 if (slave_dev == NULL)
1055 return -ENOMEM;
1056
1057 slave_dev->features = master->vlan_features;
1058 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1059 eth_hw_addr_inherit(slave_dev, master);
1060 slave_dev->priv_flags |= IFF_NO_QUEUE;
1061 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1062 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1063 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1064
1065 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1066 NULL);
1067
1068 SET_NETDEV_DEV(slave_dev, parent);
1069 slave_dev->dev.of_node = ds->pd->port_dn[port];
1070 slave_dev->vlan_features = master->vlan_features;
1071
1072 p = netdev_priv(slave_dev);
1073 p->dev = slave_dev;
1074 p->parent = ds;
1075 p->port = port;
1076
1077 switch (ds->dst->tag_protocol) {
1078 #ifdef CONFIG_NET_DSA_TAG_DSA
1079 case DSA_TAG_PROTO_DSA:
1080 p->xmit = dsa_netdev_ops.xmit;
1081 break;
1082 #endif
1083 #ifdef CONFIG_NET_DSA_TAG_EDSA
1084 case DSA_TAG_PROTO_EDSA:
1085 p->xmit = edsa_netdev_ops.xmit;
1086 break;
1087 #endif
1088 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1089 case DSA_TAG_PROTO_TRAILER:
1090 p->xmit = trailer_netdev_ops.xmit;
1091 break;
1092 #endif
1093 #ifdef CONFIG_NET_DSA_TAG_BRCM
1094 case DSA_TAG_PROTO_BRCM:
1095 p->xmit = brcm_netdev_ops.xmit;
1096 break;
1097 #endif
1098 default:
1099 p->xmit = dsa_slave_notag_xmit;
1100 break;
1101 }
1102
1103 p->old_pause = -1;
1104 p->old_link = -1;
1105 p->old_duplex = -1;
1106
1107 ds->ports[port] = slave_dev;
1108 ret = register_netdev(slave_dev);
1109 if (ret) {
1110 netdev_err(master, "error %d registering interface %s\n",
1111 ret, slave_dev->name);
1112 ds->ports[port] = NULL;
1113 free_netdev(slave_dev);
1114 return ret;
1115 }
1116
1117 netif_carrier_off(slave_dev);
1118
1119 ret = dsa_slave_phy_setup(p, slave_dev);
1120 if (ret) {
1121 netdev_err(master, "error %d setting up slave phy\n", ret);
1122 unregister_netdev(slave_dev);
1123 free_netdev(slave_dev);
1124 return ret;
1125 }
1126
1127 return 0;
1128 }
1129
1130 void dsa_slave_destroy(struct net_device *slave_dev)
1131 {
1132 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1133
1134 netif_carrier_off(slave_dev);
1135 if (p->phy)
1136 phy_disconnect(p->phy);
1137 unregister_netdev(slave_dev);
1138 free_netdev(slave_dev);
1139 }
1140
1141 static bool dsa_slave_dev_check(struct net_device *dev)
1142 {
1143 return dev->netdev_ops == &dsa_slave_netdev_ops;
1144 }
1145
1146 static int dsa_slave_port_upper_event(struct net_device *dev,
1147 unsigned long event, void *ptr)
1148 {
1149 struct netdev_notifier_changeupper_info *info = ptr;
1150 struct net_device *upper = info->upper_dev;
1151 int err = 0;
1152
1153 switch (event) {
1154 case NETDEV_CHANGEUPPER:
1155 if (netif_is_bridge_master(upper)) {
1156 if (info->linking)
1157 err = dsa_slave_bridge_port_join(dev, upper);
1158 else
1159 dsa_slave_bridge_port_leave(dev);
1160 }
1161
1162 break;
1163 }
1164
1165 return notifier_from_errno(err);
1166 }
1167
1168 static int dsa_slave_port_event(struct net_device *dev, unsigned long event,
1169 void *ptr)
1170 {
1171 switch (event) {
1172 case NETDEV_CHANGEUPPER:
1173 return dsa_slave_port_upper_event(dev, event, ptr);
1174 }
1175
1176 return NOTIFY_DONE;
1177 }
1178
1179 int dsa_slave_netdevice_event(struct notifier_block *unused,
1180 unsigned long event, void *ptr)
1181 {
1182 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1183
1184 if (dsa_slave_dev_check(dev))
1185 return dsa_slave_port_event(dev, event, ptr);
1186
1187 return NOTIFY_DONE;
1188 }
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