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Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetoot...
[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->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_join_bridge)
452 ret = ds->drv->port_join_bridge(ds, p->port, br);
453
454 return ret;
455 }
456
457 static int 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 int ret = -EOPNOTSUPP;
462
463
464 if (ds->drv->port_leave_bridge)
465 ret = ds->drv->port_leave_bridge(ds, p->port);
466
467 p->bridge_dev = NULL;
468
469 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
470 * so allow it to be in BR_STATE_FORWARDING to be kept functional
471 */
472 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
473
474 return ret;
475 }
476
477 static int dsa_slave_port_attr_get(struct net_device *dev,
478 struct switchdev_attr *attr)
479 {
480 struct dsa_slave_priv *p = netdev_priv(dev);
481 struct dsa_switch *ds = p->parent;
482
483 switch (attr->id) {
484 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
485 attr->u.ppid.id_len = sizeof(ds->index);
486 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
487 break;
488 default:
489 return -EOPNOTSUPP;
490 }
491
492 return 0;
493 }
494
495 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
496 struct sk_buff *skb)
497 {
498 #ifdef CONFIG_NET_POLL_CONTROLLER
499 if (p->netpoll)
500 netpoll_send_skb(p->netpoll, skb);
501 #else
502 BUG();
503 #endif
504 return NETDEV_TX_OK;
505 }
506
507 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
508 {
509 struct dsa_slave_priv *p = netdev_priv(dev);
510 struct sk_buff *nskb;
511
512 dev->stats.tx_packets++;
513 dev->stats.tx_bytes += skb->len;
514
515 /* Transmit function may have to reallocate the original SKB */
516 nskb = p->xmit(skb, dev);
517 if (!nskb)
518 return NETDEV_TX_OK;
519
520 /* SKB for netpoll still need to be mangled with the protocol-specific
521 * tag to be successfully transmitted
522 */
523 if (unlikely(netpoll_tx_running(dev)))
524 return dsa_netpoll_send_skb(p, nskb);
525
526 /* Queue the SKB for transmission on the parent interface, but
527 * do not modify its EtherType
528 */
529 nskb->dev = p->parent->dst->master_netdev;
530 dev_queue_xmit(nskb);
531
532 return NETDEV_TX_OK;
533 }
534
535 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
536 struct net_device *dev)
537 {
538 /* Just return the original SKB */
539 return skb;
540 }
541
542
543 /* ethtool operations *******************************************************/
544 static int
545 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
546 {
547 struct dsa_slave_priv *p = netdev_priv(dev);
548 int err;
549
550 err = -EOPNOTSUPP;
551 if (p->phy != NULL) {
552 err = phy_read_status(p->phy);
553 if (err == 0)
554 err = phy_ethtool_gset(p->phy, cmd);
555 }
556
557 return err;
558 }
559
560 static int
561 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
562 {
563 struct dsa_slave_priv *p = netdev_priv(dev);
564
565 if (p->phy != NULL)
566 return phy_ethtool_sset(p->phy, cmd);
567
568 return -EOPNOTSUPP;
569 }
570
571 static void dsa_slave_get_drvinfo(struct net_device *dev,
572 struct ethtool_drvinfo *drvinfo)
573 {
574 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
575 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
576 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
577 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
578 }
579
580 static int dsa_slave_get_regs_len(struct net_device *dev)
581 {
582 struct dsa_slave_priv *p = netdev_priv(dev);
583 struct dsa_switch *ds = p->parent;
584
585 if (ds->drv->get_regs_len)
586 return ds->drv->get_regs_len(ds, p->port);
587
588 return -EOPNOTSUPP;
589 }
590
591 static void
592 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
593 {
594 struct dsa_slave_priv *p = netdev_priv(dev);
595 struct dsa_switch *ds = p->parent;
596
597 if (ds->drv->get_regs)
598 ds->drv->get_regs(ds, p->port, regs, _p);
599 }
600
601 static int dsa_slave_nway_reset(struct net_device *dev)
602 {
603 struct dsa_slave_priv *p = netdev_priv(dev);
604
605 if (p->phy != NULL)
606 return genphy_restart_aneg(p->phy);
607
608 return -EOPNOTSUPP;
609 }
610
611 static u32 dsa_slave_get_link(struct net_device *dev)
612 {
613 struct dsa_slave_priv *p = netdev_priv(dev);
614
615 if (p->phy != NULL) {
616 genphy_update_link(p->phy);
617 return p->phy->link;
618 }
619
620 return -EOPNOTSUPP;
621 }
622
623 static int dsa_slave_get_eeprom_len(struct net_device *dev)
624 {
625 struct dsa_slave_priv *p = netdev_priv(dev);
626 struct dsa_switch *ds = p->parent;
627
628 if (ds->pd->eeprom_len)
629 return ds->pd->eeprom_len;
630
631 if (ds->drv->get_eeprom_len)
632 return ds->drv->get_eeprom_len(ds);
633
634 return 0;
635 }
636
637 static int dsa_slave_get_eeprom(struct net_device *dev,
638 struct ethtool_eeprom *eeprom, u8 *data)
639 {
640 struct dsa_slave_priv *p = netdev_priv(dev);
641 struct dsa_switch *ds = p->parent;
642
643 if (ds->drv->get_eeprom)
644 return ds->drv->get_eeprom(ds, eeprom, data);
645
646 return -EOPNOTSUPP;
647 }
648
649 static int dsa_slave_set_eeprom(struct net_device *dev,
650 struct ethtool_eeprom *eeprom, u8 *data)
651 {
652 struct dsa_slave_priv *p = netdev_priv(dev);
653 struct dsa_switch *ds = p->parent;
654
655 if (ds->drv->set_eeprom)
656 return ds->drv->set_eeprom(ds, eeprom, data);
657
658 return -EOPNOTSUPP;
659 }
660
661 static void dsa_slave_get_strings(struct net_device *dev,
662 uint32_t stringset, uint8_t *data)
663 {
664 struct dsa_slave_priv *p = netdev_priv(dev);
665 struct dsa_switch *ds = p->parent;
666
667 if (stringset == ETH_SS_STATS) {
668 int len = ETH_GSTRING_LEN;
669
670 strncpy(data, "tx_packets", len);
671 strncpy(data + len, "tx_bytes", len);
672 strncpy(data + 2 * len, "rx_packets", len);
673 strncpy(data + 3 * len, "rx_bytes", len);
674 if (ds->drv->get_strings != NULL)
675 ds->drv->get_strings(ds, p->port, data + 4 * len);
676 }
677 }
678
679 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
680 struct ethtool_stats *stats,
681 uint64_t *data)
682 {
683 struct dsa_slave_priv *p = netdev_priv(dev);
684 struct dsa_switch *ds = p->parent;
685
686 data[0] = p->dev->stats.tx_packets;
687 data[1] = p->dev->stats.tx_bytes;
688 data[2] = p->dev->stats.rx_packets;
689 data[3] = p->dev->stats.rx_bytes;
690 if (ds->drv->get_ethtool_stats != NULL)
691 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
692 }
693
694 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
695 {
696 struct dsa_slave_priv *p = netdev_priv(dev);
697 struct dsa_switch *ds = p->parent;
698
699 if (sset == ETH_SS_STATS) {
700 int count;
701
702 count = 4;
703 if (ds->drv->get_sset_count != NULL)
704 count += ds->drv->get_sset_count(ds);
705
706 return count;
707 }
708
709 return -EOPNOTSUPP;
710 }
711
712 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
713 {
714 struct dsa_slave_priv *p = netdev_priv(dev);
715 struct dsa_switch *ds = p->parent;
716
717 if (ds->drv->get_wol)
718 ds->drv->get_wol(ds, p->port, w);
719 }
720
721 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
722 {
723 struct dsa_slave_priv *p = netdev_priv(dev);
724 struct dsa_switch *ds = p->parent;
725 int ret = -EOPNOTSUPP;
726
727 if (ds->drv->set_wol)
728 ret = ds->drv->set_wol(ds, p->port, w);
729
730 return ret;
731 }
732
733 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
734 {
735 struct dsa_slave_priv *p = netdev_priv(dev);
736 struct dsa_switch *ds = p->parent;
737 int ret;
738
739 if (!ds->drv->set_eee)
740 return -EOPNOTSUPP;
741
742 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
743 if (ret)
744 return ret;
745
746 if (p->phy)
747 ret = phy_ethtool_set_eee(p->phy, e);
748
749 return ret;
750 }
751
752 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
753 {
754 struct dsa_slave_priv *p = netdev_priv(dev);
755 struct dsa_switch *ds = p->parent;
756 int ret;
757
758 if (!ds->drv->get_eee)
759 return -EOPNOTSUPP;
760
761 ret = ds->drv->get_eee(ds, p->port, e);
762 if (ret)
763 return ret;
764
765 if (p->phy)
766 ret = phy_ethtool_get_eee(p->phy, e);
767
768 return ret;
769 }
770
771 #ifdef CONFIG_NET_POLL_CONTROLLER
772 static int dsa_slave_netpoll_setup(struct net_device *dev,
773 struct netpoll_info *ni)
774 {
775 struct dsa_slave_priv *p = netdev_priv(dev);
776 struct dsa_switch *ds = p->parent;
777 struct net_device *master = ds->dst->master_netdev;
778 struct netpoll *netpoll;
779 int err = 0;
780
781 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
782 if (!netpoll)
783 return -ENOMEM;
784
785 err = __netpoll_setup(netpoll, master);
786 if (err) {
787 kfree(netpoll);
788 goto out;
789 }
790
791 p->netpoll = netpoll;
792 out:
793 return err;
794 }
795
796 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
797 {
798 struct dsa_slave_priv *p = netdev_priv(dev);
799 struct netpoll *netpoll = p->netpoll;
800
801 if (!netpoll)
802 return;
803
804 p->netpoll = NULL;
805
806 __netpoll_free_async(netpoll);
807 }
808
809 static void dsa_slave_poll_controller(struct net_device *dev)
810 {
811 }
812 #endif
813
814 static const struct ethtool_ops dsa_slave_ethtool_ops = {
815 .get_settings = dsa_slave_get_settings,
816 .set_settings = dsa_slave_set_settings,
817 .get_drvinfo = dsa_slave_get_drvinfo,
818 .get_regs_len = dsa_slave_get_regs_len,
819 .get_regs = dsa_slave_get_regs,
820 .nway_reset = dsa_slave_nway_reset,
821 .get_link = dsa_slave_get_link,
822 .get_eeprom_len = dsa_slave_get_eeprom_len,
823 .get_eeprom = dsa_slave_get_eeprom,
824 .set_eeprom = dsa_slave_set_eeprom,
825 .get_strings = dsa_slave_get_strings,
826 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
827 .get_sset_count = dsa_slave_get_sset_count,
828 .set_wol = dsa_slave_set_wol,
829 .get_wol = dsa_slave_get_wol,
830 .set_eee = dsa_slave_set_eee,
831 .get_eee = dsa_slave_get_eee,
832 };
833
834 static const struct net_device_ops dsa_slave_netdev_ops = {
835 .ndo_open = dsa_slave_open,
836 .ndo_stop = dsa_slave_close,
837 .ndo_start_xmit = dsa_slave_xmit,
838 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
839 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
840 .ndo_set_mac_address = dsa_slave_set_mac_address,
841 .ndo_fdb_add = switchdev_port_fdb_add,
842 .ndo_fdb_del = switchdev_port_fdb_del,
843 .ndo_fdb_dump = switchdev_port_fdb_dump,
844 .ndo_do_ioctl = dsa_slave_ioctl,
845 .ndo_get_iflink = dsa_slave_get_iflink,
846 #ifdef CONFIG_NET_POLL_CONTROLLER
847 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
848 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
849 .ndo_poll_controller = dsa_slave_poll_controller,
850 #endif
851 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
852 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
853 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
854 };
855
856 static const struct switchdev_ops dsa_slave_switchdev_ops = {
857 .switchdev_port_attr_get = dsa_slave_port_attr_get,
858 .switchdev_port_attr_set = dsa_slave_port_attr_set,
859 .switchdev_port_obj_add = dsa_slave_port_obj_add,
860 .switchdev_port_obj_del = dsa_slave_port_obj_del,
861 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
862 };
863
864 static struct device_type dsa_type = {
865 .name = "dsa",
866 };
867
868 static void dsa_slave_adjust_link(struct net_device *dev)
869 {
870 struct dsa_slave_priv *p = netdev_priv(dev);
871 struct dsa_switch *ds = p->parent;
872 unsigned int status_changed = 0;
873
874 if (p->old_link != p->phy->link) {
875 status_changed = 1;
876 p->old_link = p->phy->link;
877 }
878
879 if (p->old_duplex != p->phy->duplex) {
880 status_changed = 1;
881 p->old_duplex = p->phy->duplex;
882 }
883
884 if (p->old_pause != p->phy->pause) {
885 status_changed = 1;
886 p->old_pause = p->phy->pause;
887 }
888
889 if (ds->drv->adjust_link && status_changed)
890 ds->drv->adjust_link(ds, p->port, p->phy);
891
892 if (status_changed)
893 phy_print_status(p->phy);
894 }
895
896 static int dsa_slave_fixed_link_update(struct net_device *dev,
897 struct fixed_phy_status *status)
898 {
899 struct dsa_slave_priv *p;
900 struct dsa_switch *ds;
901
902 if (dev) {
903 p = netdev_priv(dev);
904 ds = p->parent;
905 if (ds->drv->fixed_link_update)
906 ds->drv->fixed_link_update(ds, p->port, status);
907 }
908
909 return 0;
910 }
911
912 /* slave device setup *******************************************************/
913 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
914 struct net_device *slave_dev,
915 int addr)
916 {
917 struct dsa_switch *ds = p->parent;
918
919 p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr);
920 if (!p->phy) {
921 netdev_err(slave_dev, "no phy at %d\n", addr);
922 return -ENODEV;
923 }
924
925 /* Use already configured phy mode */
926 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
927 p->phy_interface = p->phy->interface;
928 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
929 p->phy_interface);
930
931 return 0;
932 }
933
934 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
935 struct net_device *slave_dev)
936 {
937 struct dsa_switch *ds = p->parent;
938 struct dsa_chip_data *cd = ds->pd;
939 struct device_node *phy_dn, *port_dn;
940 bool phy_is_fixed = false;
941 u32 phy_flags = 0;
942 int mode, ret;
943
944 port_dn = cd->port_dn[p->port];
945 mode = of_get_phy_mode(port_dn);
946 if (mode < 0)
947 mode = PHY_INTERFACE_MODE_NA;
948 p->phy_interface = mode;
949
950 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
951 if (of_phy_is_fixed_link(port_dn)) {
952 /* In the case of a fixed PHY, the DT node associated
953 * to the fixed PHY is the Port DT node
954 */
955 ret = of_phy_register_fixed_link(port_dn);
956 if (ret) {
957 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
958 return ret;
959 }
960 phy_is_fixed = true;
961 phy_dn = port_dn;
962 }
963
964 if (ds->drv->get_phy_flags)
965 phy_flags = ds->drv->get_phy_flags(ds, p->port);
966
967 if (phy_dn) {
968 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
969
970 /* If this PHY address is part of phys_mii_mask, which means
971 * that we need to divert reads and writes to/from it, then we
972 * want to bind this device using the slave MII bus created by
973 * DSA to make that happen.
974 */
975 if (!phy_is_fixed && phy_id >= 0 &&
976 (ds->phys_mii_mask & (1 << phy_id))) {
977 ret = dsa_slave_phy_connect(p, slave_dev, phy_id);
978 if (ret) {
979 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret);
980 return ret;
981 }
982 } else {
983 p->phy = of_phy_connect(slave_dev, phy_dn,
984 dsa_slave_adjust_link,
985 phy_flags,
986 p->phy_interface);
987 }
988 }
989
990 if (p->phy && phy_is_fixed)
991 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
992
993 /* We could not connect to a designated PHY, so use the switch internal
994 * MDIO bus instead
995 */
996 if (!p->phy) {
997 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
998 if (ret) {
999 netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret);
1000 return ret;
1001 }
1002 }
1003
1004 phy_attached_info(p->phy);
1005
1006 return 0;
1007 }
1008
1009 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1010 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1011 struct netdev_queue *txq,
1012 void *_unused)
1013 {
1014 lockdep_set_class(&txq->_xmit_lock,
1015 &dsa_slave_netdev_xmit_lock_key);
1016 }
1017
1018 int dsa_slave_suspend(struct net_device *slave_dev)
1019 {
1020 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1021
1022 if (p->phy) {
1023 phy_stop(p->phy);
1024 p->old_pause = -1;
1025 p->old_link = -1;
1026 p->old_duplex = -1;
1027 phy_suspend(p->phy);
1028 }
1029
1030 return 0;
1031 }
1032
1033 int dsa_slave_resume(struct net_device *slave_dev)
1034 {
1035 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1036
1037 netif_device_attach(slave_dev);
1038
1039 if (p->phy) {
1040 phy_resume(p->phy);
1041 phy_start(p->phy);
1042 }
1043
1044 return 0;
1045 }
1046
1047 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1048 int port, char *name)
1049 {
1050 struct net_device *master = ds->dst->master_netdev;
1051 struct net_device *slave_dev;
1052 struct dsa_slave_priv *p;
1053 int ret;
1054
1055 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1056 NET_NAME_UNKNOWN, ether_setup);
1057 if (slave_dev == NULL)
1058 return -ENOMEM;
1059
1060 slave_dev->features = master->vlan_features;
1061 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1062 eth_hw_addr_inherit(slave_dev, master);
1063 slave_dev->priv_flags |= IFF_NO_QUEUE;
1064 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1065 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1066 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1067
1068 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1069 NULL);
1070
1071 SET_NETDEV_DEV(slave_dev, parent);
1072 slave_dev->dev.of_node = ds->pd->port_dn[port];
1073 slave_dev->vlan_features = master->vlan_features;
1074
1075 p = netdev_priv(slave_dev);
1076 p->dev = slave_dev;
1077 p->parent = ds;
1078 p->port = port;
1079
1080 switch (ds->dst->tag_protocol) {
1081 #ifdef CONFIG_NET_DSA_TAG_DSA
1082 case DSA_TAG_PROTO_DSA:
1083 p->xmit = dsa_netdev_ops.xmit;
1084 break;
1085 #endif
1086 #ifdef CONFIG_NET_DSA_TAG_EDSA
1087 case DSA_TAG_PROTO_EDSA:
1088 p->xmit = edsa_netdev_ops.xmit;
1089 break;
1090 #endif
1091 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1092 case DSA_TAG_PROTO_TRAILER:
1093 p->xmit = trailer_netdev_ops.xmit;
1094 break;
1095 #endif
1096 #ifdef CONFIG_NET_DSA_TAG_BRCM
1097 case DSA_TAG_PROTO_BRCM:
1098 p->xmit = brcm_netdev_ops.xmit;
1099 break;
1100 #endif
1101 default:
1102 p->xmit = dsa_slave_notag_xmit;
1103 break;
1104 }
1105
1106 p->old_pause = -1;
1107 p->old_link = -1;
1108 p->old_duplex = -1;
1109
1110 ds->ports[port] = slave_dev;
1111 ret = register_netdev(slave_dev);
1112 if (ret) {
1113 netdev_err(master, "error %d registering interface %s\n",
1114 ret, slave_dev->name);
1115 ds->ports[port] = NULL;
1116 free_netdev(slave_dev);
1117 return ret;
1118 }
1119
1120 netif_carrier_off(slave_dev);
1121
1122 ret = dsa_slave_phy_setup(p, slave_dev);
1123 if (ret) {
1124 netdev_err(master, "error %d setting up slave phy\n", ret);
1125 unregister_netdev(slave_dev);
1126 free_netdev(slave_dev);
1127 return ret;
1128 }
1129
1130 return 0;
1131 }
1132
1133 void dsa_slave_destroy(struct net_device *slave_dev)
1134 {
1135 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1136
1137 netif_carrier_off(slave_dev);
1138 if (p->phy)
1139 phy_disconnect(p->phy);
1140 unregister_netdev(slave_dev);
1141 free_netdev(slave_dev);
1142 }
1143
1144 static bool dsa_slave_dev_check(struct net_device *dev)
1145 {
1146 return dev->netdev_ops == &dsa_slave_netdev_ops;
1147 }
1148
1149 static int dsa_slave_master_changed(struct net_device *dev)
1150 {
1151 struct net_device *master = netdev_master_upper_dev_get(dev);
1152 struct dsa_slave_priv *p = netdev_priv(dev);
1153 int err = 0;
1154
1155 if (master && master->rtnl_link_ops &&
1156 !strcmp(master->rtnl_link_ops->kind, "bridge"))
1157 err = dsa_slave_bridge_port_join(dev, master);
1158 else if (dsa_port_is_bridged(p))
1159 err = dsa_slave_bridge_port_leave(dev);
1160
1161 return err;
1162 }
1163
1164 int dsa_slave_netdevice_event(struct notifier_block *unused,
1165 unsigned long event, void *ptr)
1166 {
1167 struct net_device *dev;
1168 int err = 0;
1169
1170 switch (event) {
1171 case NETDEV_CHANGEUPPER:
1172 dev = netdev_notifier_info_to_dev(ptr);
1173 if (!dsa_slave_dev_check(dev))
1174 goto out;
1175
1176 err = dsa_slave_master_changed(dev);
1177 if (err && err != -EOPNOTSUPP)
1178 netdev_warn(dev, "failed to reflect master change\n");
1179
1180 break;
1181 }
1182
1183 out:
1184 return NOTIFY_DONE;
1185 }
Linux kernel - Deliverables
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