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NFC: pn533: handle interrupted commands in pn533_recv_frame
[mirror_ubuntu-hirsute-kernel.git] / net / dsa / slave.c
1 /*
2 * net/dsa/slave.c - Slave device handling
3 * Copyright (c) 2008-2009 Marvell Semiconductor
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10
11 #include <linux/list.h>
12 #include <linux/etherdevice.h>
13 #include <linux/netdevice.h>
14 #include <linux/phy.h>
15 #include <linux/phy_fixed.h>
16 #include <linux/of_net.h>
17 #include <linux/of_mdio.h>
18 #include <linux/mdio.h>
19 #include <net/rtnetlink.h>
20 #include <net/switchdev.h>
21 #include <linux/if_bridge.h>
22 #include <linux/netpoll.h>
23 #include "dsa_priv.h"
24
25 /* slave mii_bus handling ***************************************************/
26 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
27 {
28 struct dsa_switch *ds = bus->priv;
29
30 if (ds->phys_mii_mask & (1 << addr))
31 return ds->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_state_set)
108 ds->drv->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->drv->port_disable)
148 ds->drv->port_disable(ds, p->port, p->phy);
149
150 if (ds->drv->port_stp_state_set)
151 ds->drv->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->drv->port_vlan_prepare || !ds->drv->port_vlan_add)
213 return -EOPNOTSUPP;
214
215 return ds->drv->port_vlan_prepare(ds, p->port, vlan, trans);
216 }
217
218 ds->drv->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->drv->port_vlan_del)
230 return -EOPNOTSUPP;
231
232 return ds->drv->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->drv->port_vlan_dump)
243 return ds->drv->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->drv->port_fdb_prepare || !ds->drv->port_fdb_add)
257 return -EOPNOTSUPP;
258
259 return ds->drv->port_fdb_prepare(ds, p->port, fdb, trans);
260 }
261
262 ds->drv->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->drv->port_fdb_del)
275 ret = ds->drv->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->drv->port_fdb_dump)
288 return ds->drv->port_fdb_dump(ds, p->port, fdb, cb);
289
290 return -EOPNOTSUPP;
291 }
292
293 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
294 {
295 struct dsa_slave_priv *p = netdev_priv(dev);
296
297 if (p->phy != NULL)
298 return phy_mii_ioctl(p->phy, ifr, cmd);
299
300 return -EOPNOTSUPP;
301 }
302
303 static int dsa_slave_stp_state_set(struct net_device *dev,
304 const struct switchdev_attr *attr,
305 struct switchdev_trans *trans)
306 {
307 struct dsa_slave_priv *p = netdev_priv(dev);
308 struct dsa_switch *ds = p->parent;
309
310 if (switchdev_trans_ph_prepare(trans))
311 return ds->drv->port_stp_state_set ? 0 : -EOPNOTSUPP;
312
313 ds->drv->port_stp_state_set(ds, p->port, attr->u.stp_state);
314
315 return 0;
316 }
317
318 static int dsa_slave_vlan_filtering(struct net_device *dev,
319 const struct switchdev_attr *attr,
320 struct switchdev_trans *trans)
321 {
322 struct dsa_slave_priv *p = netdev_priv(dev);
323 struct dsa_switch *ds = p->parent;
324
325 /* bridge skips -EOPNOTSUPP, so skip the prepare phase */
326 if (switchdev_trans_ph_prepare(trans))
327 return 0;
328
329 if (ds->drv->port_vlan_filtering)
330 return ds->drv->port_vlan_filtering(ds, p->port,
331 attr->u.vlan_filtering);
332
333 return 0;
334 }
335
336 static int dsa_slave_port_attr_set(struct net_device *dev,
337 const struct switchdev_attr *attr,
338 struct switchdev_trans *trans)
339 {
340 int ret;
341
342 switch (attr->id) {
343 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
344 ret = dsa_slave_stp_state_set(dev, attr, trans);
345 break;
346 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
347 ret = dsa_slave_vlan_filtering(dev, attr, trans);
348 break;
349 default:
350 ret = -EOPNOTSUPP;
351 break;
352 }
353
354 return ret;
355 }
356
357 static int dsa_slave_port_obj_add(struct net_device *dev,
358 const struct switchdev_obj *obj,
359 struct switchdev_trans *trans)
360 {
361 int err;
362
363 /* For the prepare phase, ensure the full set of changes is feasable in
364 * one go in order to signal a failure properly. If an operation is not
365 * supported, return -EOPNOTSUPP.
366 */
367
368 switch (obj->id) {
369 case SWITCHDEV_OBJ_ID_PORT_FDB:
370 err = dsa_slave_port_fdb_add(dev,
371 SWITCHDEV_OBJ_PORT_FDB(obj),
372 trans);
373 break;
374 case SWITCHDEV_OBJ_ID_PORT_VLAN:
375 err = dsa_slave_port_vlan_add(dev,
376 SWITCHDEV_OBJ_PORT_VLAN(obj),
377 trans);
378 break;
379 default:
380 err = -EOPNOTSUPP;
381 break;
382 }
383
384 return err;
385 }
386
387 static int dsa_slave_port_obj_del(struct net_device *dev,
388 const struct switchdev_obj *obj)
389 {
390 int err;
391
392 switch (obj->id) {
393 case SWITCHDEV_OBJ_ID_PORT_FDB:
394 err = dsa_slave_port_fdb_del(dev,
395 SWITCHDEV_OBJ_PORT_FDB(obj));
396 break;
397 case SWITCHDEV_OBJ_ID_PORT_VLAN:
398 err = dsa_slave_port_vlan_del(dev,
399 SWITCHDEV_OBJ_PORT_VLAN(obj));
400 break;
401 default:
402 err = -EOPNOTSUPP;
403 break;
404 }
405
406 return err;
407 }
408
409 static int dsa_slave_port_obj_dump(struct net_device *dev,
410 struct switchdev_obj *obj,
411 switchdev_obj_dump_cb_t *cb)
412 {
413 int err;
414
415 switch (obj->id) {
416 case SWITCHDEV_OBJ_ID_PORT_FDB:
417 err = dsa_slave_port_fdb_dump(dev,
418 SWITCHDEV_OBJ_PORT_FDB(obj),
419 cb);
420 break;
421 case SWITCHDEV_OBJ_ID_PORT_VLAN:
422 err = dsa_slave_port_vlan_dump(dev,
423 SWITCHDEV_OBJ_PORT_VLAN(obj),
424 cb);
425 break;
426 default:
427 err = -EOPNOTSUPP;
428 break;
429 }
430
431 return err;
432 }
433
434 static int dsa_slave_bridge_port_join(struct net_device *dev,
435 struct net_device *br)
436 {
437 struct dsa_slave_priv *p = netdev_priv(dev);
438 struct dsa_switch *ds = p->parent;
439 int ret = -EOPNOTSUPP;
440
441 p->bridge_dev = br;
442
443 if (ds->drv->port_bridge_join)
444 ret = ds->drv->port_bridge_join(ds, p->port, br);
445
446 return ret == -EOPNOTSUPP ? 0 : ret;
447 }
448
449 static void dsa_slave_bridge_port_leave(struct net_device *dev)
450 {
451 struct dsa_slave_priv *p = netdev_priv(dev);
452 struct dsa_switch *ds = p->parent;
453
454
455 if (ds->drv->port_bridge_leave)
456 ds->drv->port_bridge_leave(ds, p->port);
457
458 p->bridge_dev = NULL;
459
460 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
461 * so allow it to be in BR_STATE_FORWARDING to be kept functional
462 */
463 if (ds->drv->port_stp_state_set)
464 ds->drv->port_stp_state_set(ds, p->port, BR_STATE_FORWARDING);
465 }
466
467 static int dsa_slave_port_attr_get(struct net_device *dev,
468 struct switchdev_attr *attr)
469 {
470 struct dsa_slave_priv *p = netdev_priv(dev);
471 struct dsa_switch *ds = p->parent;
472
473 switch (attr->id) {
474 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
475 attr->u.ppid.id_len = sizeof(ds->index);
476 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
477 break;
478 default:
479 return -EOPNOTSUPP;
480 }
481
482 return 0;
483 }
484
485 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
486 struct sk_buff *skb)
487 {
488 #ifdef CONFIG_NET_POLL_CONTROLLER
489 if (p->netpoll)
490 netpoll_send_skb(p->netpoll, skb);
491 #else
492 BUG();
493 #endif
494 return NETDEV_TX_OK;
495 }
496
497 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
498 {
499 struct dsa_slave_priv *p = netdev_priv(dev);
500 struct sk_buff *nskb;
501
502 dev->stats.tx_packets++;
503 dev->stats.tx_bytes += skb->len;
504
505 /* Transmit function may have to reallocate the original SKB */
506 nskb = p->xmit(skb, dev);
507 if (!nskb)
508 return NETDEV_TX_OK;
509
510 /* SKB for netpoll still need to be mangled with the protocol-specific
511 * tag to be successfully transmitted
512 */
513 if (unlikely(netpoll_tx_running(dev)))
514 return dsa_netpoll_send_skb(p, nskb);
515
516 /* Queue the SKB for transmission on the parent interface, but
517 * do not modify its EtherType
518 */
519 nskb->dev = p->parent->dst->master_netdev;
520 dev_queue_xmit(nskb);
521
522 return NETDEV_TX_OK;
523 }
524
525 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
526 struct net_device *dev)
527 {
528 /* Just return the original SKB */
529 return skb;
530 }
531
532
533 /* ethtool operations *******************************************************/
534 static int
535 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
536 {
537 struct dsa_slave_priv *p = netdev_priv(dev);
538 int err;
539
540 err = -EOPNOTSUPP;
541 if (p->phy != NULL) {
542 err = phy_read_status(p->phy);
543 if (err == 0)
544 err = phy_ethtool_gset(p->phy, cmd);
545 }
546
547 return err;
548 }
549
550 static int
551 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
552 {
553 struct dsa_slave_priv *p = netdev_priv(dev);
554
555 if (p->phy != NULL)
556 return phy_ethtool_sset(p->phy, cmd);
557
558 return -EOPNOTSUPP;
559 }
560
561 static void dsa_slave_get_drvinfo(struct net_device *dev,
562 struct ethtool_drvinfo *drvinfo)
563 {
564 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
565 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
566 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
567 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
568 }
569
570 static int dsa_slave_get_regs_len(struct net_device *dev)
571 {
572 struct dsa_slave_priv *p = netdev_priv(dev);
573 struct dsa_switch *ds = p->parent;
574
575 if (ds->drv->get_regs_len)
576 return ds->drv->get_regs_len(ds, p->port);
577
578 return -EOPNOTSUPP;
579 }
580
581 static void
582 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
583 {
584 struct dsa_slave_priv *p = netdev_priv(dev);
585 struct dsa_switch *ds = p->parent;
586
587 if (ds->drv->get_regs)
588 ds->drv->get_regs(ds, p->port, regs, _p);
589 }
590
591 static int dsa_slave_nway_reset(struct net_device *dev)
592 {
593 struct dsa_slave_priv *p = netdev_priv(dev);
594
595 if (p->phy != NULL)
596 return genphy_restart_aneg(p->phy);
597
598 return -EOPNOTSUPP;
599 }
600
601 static u32 dsa_slave_get_link(struct net_device *dev)
602 {
603 struct dsa_slave_priv *p = netdev_priv(dev);
604
605 if (p->phy != NULL) {
606 genphy_update_link(p->phy);
607 return p->phy->link;
608 }
609
610 return -EOPNOTSUPP;
611 }
612
613 static int dsa_slave_get_eeprom_len(struct net_device *dev)
614 {
615 struct dsa_slave_priv *p = netdev_priv(dev);
616 struct dsa_switch *ds = p->parent;
617
618 if (ds->pd->eeprom_len)
619 return ds->pd->eeprom_len;
620
621 if (ds->drv->get_eeprom_len)
622 return ds->drv->get_eeprom_len(ds);
623
624 return 0;
625 }
626
627 static int dsa_slave_get_eeprom(struct net_device *dev,
628 struct ethtool_eeprom *eeprom, u8 *data)
629 {
630 struct dsa_slave_priv *p = netdev_priv(dev);
631 struct dsa_switch *ds = p->parent;
632
633 if (ds->drv->get_eeprom)
634 return ds->drv->get_eeprom(ds, eeprom, data);
635
636 return -EOPNOTSUPP;
637 }
638
639 static int dsa_slave_set_eeprom(struct net_device *dev,
640 struct ethtool_eeprom *eeprom, u8 *data)
641 {
642 struct dsa_slave_priv *p = netdev_priv(dev);
643 struct dsa_switch *ds = p->parent;
644
645 if (ds->drv->set_eeprom)
646 return ds->drv->set_eeprom(ds, eeprom, data);
647
648 return -EOPNOTSUPP;
649 }
650
651 static void dsa_slave_get_strings(struct net_device *dev,
652 uint32_t stringset, uint8_t *data)
653 {
654 struct dsa_slave_priv *p = netdev_priv(dev);
655 struct dsa_switch *ds = p->parent;
656
657 if (stringset == ETH_SS_STATS) {
658 int len = ETH_GSTRING_LEN;
659
660 strncpy(data, "tx_packets", len);
661 strncpy(data + len, "tx_bytes", len);
662 strncpy(data + 2 * len, "rx_packets", len);
663 strncpy(data + 3 * len, "rx_bytes", len);
664 if (ds->drv->get_strings != NULL)
665 ds->drv->get_strings(ds, p->port, data + 4 * len);
666 }
667 }
668
669 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
670 struct ethtool_stats *stats,
671 uint64_t *data)
672 {
673 struct dsa_slave_priv *p = netdev_priv(dev);
674 struct dsa_switch *ds = p->parent;
675
676 data[0] = p->dev->stats.tx_packets;
677 data[1] = p->dev->stats.tx_bytes;
678 data[2] = p->dev->stats.rx_packets;
679 data[3] = p->dev->stats.rx_bytes;
680 if (ds->drv->get_ethtool_stats != NULL)
681 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
682 }
683
684 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
685 {
686 struct dsa_slave_priv *p = netdev_priv(dev);
687 struct dsa_switch *ds = p->parent;
688
689 if (sset == ETH_SS_STATS) {
690 int count;
691
692 count = 4;
693 if (ds->drv->get_sset_count != NULL)
694 count += ds->drv->get_sset_count(ds);
695
696 return count;
697 }
698
699 return -EOPNOTSUPP;
700 }
701
702 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
703 {
704 struct dsa_slave_priv *p = netdev_priv(dev);
705 struct dsa_switch *ds = p->parent;
706
707 if (ds->drv->get_wol)
708 ds->drv->get_wol(ds, p->port, w);
709 }
710
711 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
712 {
713 struct dsa_slave_priv *p = netdev_priv(dev);
714 struct dsa_switch *ds = p->parent;
715 int ret = -EOPNOTSUPP;
716
717 if (ds->drv->set_wol)
718 ret = ds->drv->set_wol(ds, p->port, w);
719
720 return ret;
721 }
722
723 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
724 {
725 struct dsa_slave_priv *p = netdev_priv(dev);
726 struct dsa_switch *ds = p->parent;
727 int ret;
728
729 if (!ds->drv->set_eee)
730 return -EOPNOTSUPP;
731
732 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
733 if (ret)
734 return ret;
735
736 if (p->phy)
737 ret = phy_ethtool_set_eee(p->phy, e);
738
739 return ret;
740 }
741
742 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
743 {
744 struct dsa_slave_priv *p = netdev_priv(dev);
745 struct dsa_switch *ds = p->parent;
746 int ret;
747
748 if (!ds->drv->get_eee)
749 return -EOPNOTSUPP;
750
751 ret = ds->drv->get_eee(ds, p->port, e);
752 if (ret)
753 return ret;
754
755 if (p->phy)
756 ret = phy_ethtool_get_eee(p->phy, e);
757
758 return ret;
759 }
760
761 #ifdef CONFIG_NET_POLL_CONTROLLER
762 static int dsa_slave_netpoll_setup(struct net_device *dev,
763 struct netpoll_info *ni)
764 {
765 struct dsa_slave_priv *p = netdev_priv(dev);
766 struct dsa_switch *ds = p->parent;
767 struct net_device *master = ds->dst->master_netdev;
768 struct netpoll *netpoll;
769 int err = 0;
770
771 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
772 if (!netpoll)
773 return -ENOMEM;
774
775 err = __netpoll_setup(netpoll, master);
776 if (err) {
777 kfree(netpoll);
778 goto out;
779 }
780
781 p->netpoll = netpoll;
782 out:
783 return err;
784 }
785
786 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
787 {
788 struct dsa_slave_priv *p = netdev_priv(dev);
789 struct netpoll *netpoll = p->netpoll;
790
791 if (!netpoll)
792 return;
793
794 p->netpoll = NULL;
795
796 __netpoll_free_async(netpoll);
797 }
798
799 static void dsa_slave_poll_controller(struct net_device *dev)
800 {
801 }
802 #endif
803
804 static const struct ethtool_ops dsa_slave_ethtool_ops = {
805 .get_settings = dsa_slave_get_settings,
806 .set_settings = dsa_slave_set_settings,
807 .get_drvinfo = dsa_slave_get_drvinfo,
808 .get_regs_len = dsa_slave_get_regs_len,
809 .get_regs = dsa_slave_get_regs,
810 .nway_reset = dsa_slave_nway_reset,
811 .get_link = dsa_slave_get_link,
812 .get_eeprom_len = dsa_slave_get_eeprom_len,
813 .get_eeprom = dsa_slave_get_eeprom,
814 .set_eeprom = dsa_slave_set_eeprom,
815 .get_strings = dsa_slave_get_strings,
816 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
817 .get_sset_count = dsa_slave_get_sset_count,
818 .set_wol = dsa_slave_set_wol,
819 .get_wol = dsa_slave_get_wol,
820 .set_eee = dsa_slave_set_eee,
821 .get_eee = dsa_slave_get_eee,
822 };
823
824 static const struct net_device_ops dsa_slave_netdev_ops = {
825 .ndo_open = dsa_slave_open,
826 .ndo_stop = dsa_slave_close,
827 .ndo_start_xmit = dsa_slave_xmit,
828 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
829 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
830 .ndo_set_mac_address = dsa_slave_set_mac_address,
831 .ndo_fdb_add = switchdev_port_fdb_add,
832 .ndo_fdb_del = switchdev_port_fdb_del,
833 .ndo_fdb_dump = switchdev_port_fdb_dump,
834 .ndo_do_ioctl = dsa_slave_ioctl,
835 .ndo_get_iflink = dsa_slave_get_iflink,
836 #ifdef CONFIG_NET_POLL_CONTROLLER
837 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
838 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
839 .ndo_poll_controller = dsa_slave_poll_controller,
840 #endif
841 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
842 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
843 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
844 };
845
846 static const struct switchdev_ops dsa_slave_switchdev_ops = {
847 .switchdev_port_attr_get = dsa_slave_port_attr_get,
848 .switchdev_port_attr_set = dsa_slave_port_attr_set,
849 .switchdev_port_obj_add = dsa_slave_port_obj_add,
850 .switchdev_port_obj_del = dsa_slave_port_obj_del,
851 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
852 };
853
854 static struct device_type dsa_type = {
855 .name = "dsa",
856 };
857
858 static void dsa_slave_adjust_link(struct net_device *dev)
859 {
860 struct dsa_slave_priv *p = netdev_priv(dev);
861 struct dsa_switch *ds = p->parent;
862 unsigned int status_changed = 0;
863
864 if (p->old_link != p->phy->link) {
865 status_changed = 1;
866 p->old_link = p->phy->link;
867 }
868
869 if (p->old_duplex != p->phy->duplex) {
870 status_changed = 1;
871 p->old_duplex = p->phy->duplex;
872 }
873
874 if (p->old_pause != p->phy->pause) {
875 status_changed = 1;
876 p->old_pause = p->phy->pause;
877 }
878
879 if (ds->drv->adjust_link && status_changed)
880 ds->drv->adjust_link(ds, p->port, p->phy);
881
882 if (status_changed)
883 phy_print_status(p->phy);
884 }
885
886 static int dsa_slave_fixed_link_update(struct net_device *dev,
887 struct fixed_phy_status *status)
888 {
889 struct dsa_slave_priv *p;
890 struct dsa_switch *ds;
891
892 if (dev) {
893 p = netdev_priv(dev);
894 ds = p->parent;
895 if (ds->drv->fixed_link_update)
896 ds->drv->fixed_link_update(ds, p->port, status);
897 }
898
899 return 0;
900 }
901
902 /* slave device setup *******************************************************/
903 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
904 struct net_device *slave_dev,
905 int addr)
906 {
907 struct dsa_switch *ds = p->parent;
908
909 p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr);
910 if (!p->phy) {
911 netdev_err(slave_dev, "no phy at %d\n", addr);
912 return -ENODEV;
913 }
914
915 /* Use already configured phy mode */
916 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
917 p->phy_interface = p->phy->interface;
918 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
919 p->phy_interface);
920
921 return 0;
922 }
923
924 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
925 struct net_device *slave_dev)
926 {
927 struct dsa_switch *ds = p->parent;
928 struct dsa_chip_data *cd = ds->pd;
929 struct device_node *phy_dn, *port_dn;
930 bool phy_is_fixed = false;
931 u32 phy_flags = 0;
932 int mode, ret;
933
934 port_dn = cd->port_dn[p->port];
935 mode = of_get_phy_mode(port_dn);
936 if (mode < 0)
937 mode = PHY_INTERFACE_MODE_NA;
938 p->phy_interface = mode;
939
940 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
941 if (of_phy_is_fixed_link(port_dn)) {
942 /* In the case of a fixed PHY, the DT node associated
943 * to the fixed PHY is the Port DT node
944 */
945 ret = of_phy_register_fixed_link(port_dn);
946 if (ret) {
947 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
948 return ret;
949 }
950 phy_is_fixed = true;
951 phy_dn = port_dn;
952 }
953
954 if (ds->drv->get_phy_flags)
955 phy_flags = ds->drv->get_phy_flags(ds, p->port);
956
957 if (phy_dn) {
958 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
959
960 /* If this PHY address is part of phys_mii_mask, which means
961 * that we need to divert reads and writes to/from it, then we
962 * want to bind this device using the slave MII bus created by
963 * DSA to make that happen.
964 */
965 if (!phy_is_fixed && phy_id >= 0 &&
966 (ds->phys_mii_mask & (1 << phy_id))) {
967 ret = dsa_slave_phy_connect(p, slave_dev, phy_id);
968 if (ret) {
969 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret);
970 return ret;
971 }
972 } else {
973 p->phy = of_phy_connect(slave_dev, phy_dn,
974 dsa_slave_adjust_link,
975 phy_flags,
976 p->phy_interface);
977 }
978 }
979
980 if (p->phy && phy_is_fixed)
981 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
982
983 /* We could not connect to a designated PHY, so use the switch internal
984 * MDIO bus instead
985 */
986 if (!p->phy) {
987 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
988 if (ret) {
989 netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret);
990 return ret;
991 }
992 }
993
994 phy_attached_info(p->phy);
995
996 return 0;
997 }
998
999 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1000 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1001 struct netdev_queue *txq,
1002 void *_unused)
1003 {
1004 lockdep_set_class(&txq->_xmit_lock,
1005 &dsa_slave_netdev_xmit_lock_key);
1006 }
1007
1008 int dsa_slave_suspend(struct net_device *slave_dev)
1009 {
1010 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1011
1012 if (p->phy) {
1013 phy_stop(p->phy);
1014 p->old_pause = -1;
1015 p->old_link = -1;
1016 p->old_duplex = -1;
1017 phy_suspend(p->phy);
1018 }
1019
1020 return 0;
1021 }
1022
1023 int dsa_slave_resume(struct net_device *slave_dev)
1024 {
1025 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1026
1027 netif_device_attach(slave_dev);
1028
1029 if (p->phy) {
1030 phy_resume(p->phy);
1031 phy_start(p->phy);
1032 }
1033
1034 return 0;
1035 }
1036
1037 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1038 int port, char *name)
1039 {
1040 struct net_device *master = ds->dst->master_netdev;
1041 struct net_device *slave_dev;
1042 struct dsa_slave_priv *p;
1043 int ret;
1044
1045 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1046 NET_NAME_UNKNOWN, ether_setup);
1047 if (slave_dev == NULL)
1048 return -ENOMEM;
1049
1050 slave_dev->features = master->vlan_features;
1051 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1052 eth_hw_addr_inherit(slave_dev, master);
1053 slave_dev->priv_flags |= IFF_NO_QUEUE;
1054 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1055 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1056 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1057
1058 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1059 NULL);
1060
1061 SET_NETDEV_DEV(slave_dev, parent);
1062 slave_dev->dev.of_node = ds->pd->port_dn[port];
1063 slave_dev->vlan_features = master->vlan_features;
1064
1065 p = netdev_priv(slave_dev);
1066 p->dev = slave_dev;
1067 p->parent = ds;
1068 p->port = port;
1069
1070 switch (ds->dst->tag_protocol) {
1071 #ifdef CONFIG_NET_DSA_TAG_DSA
1072 case DSA_TAG_PROTO_DSA:
1073 p->xmit = dsa_netdev_ops.xmit;
1074 break;
1075 #endif
1076 #ifdef CONFIG_NET_DSA_TAG_EDSA
1077 case DSA_TAG_PROTO_EDSA:
1078 p->xmit = edsa_netdev_ops.xmit;
1079 break;
1080 #endif
1081 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1082 case DSA_TAG_PROTO_TRAILER:
1083 p->xmit = trailer_netdev_ops.xmit;
1084 break;
1085 #endif
1086 #ifdef CONFIG_NET_DSA_TAG_BRCM
1087 case DSA_TAG_PROTO_BRCM:
1088 p->xmit = brcm_netdev_ops.xmit;
1089 break;
1090 #endif
1091 default:
1092 p->xmit = dsa_slave_notag_xmit;
1093 break;
1094 }
1095
1096 p->old_pause = -1;
1097 p->old_link = -1;
1098 p->old_duplex = -1;
1099
1100 ds->ports[port] = slave_dev;
1101 ret = register_netdev(slave_dev);
1102 if (ret) {
1103 netdev_err(master, "error %d registering interface %s\n",
1104 ret, slave_dev->name);
1105 ds->ports[port] = NULL;
1106 free_netdev(slave_dev);
1107 return ret;
1108 }
1109
1110 netif_carrier_off(slave_dev);
1111
1112 ret = dsa_slave_phy_setup(p, slave_dev);
1113 if (ret) {
1114 netdev_err(master, "error %d setting up slave phy\n", ret);
1115 unregister_netdev(slave_dev);
1116 free_netdev(slave_dev);
1117 return ret;
1118 }
1119
1120 return 0;
1121 }
1122
1123 void dsa_slave_destroy(struct net_device *slave_dev)
1124 {
1125 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1126
1127 netif_carrier_off(slave_dev);
1128 if (p->phy)
1129 phy_disconnect(p->phy);
1130 unregister_netdev(slave_dev);
1131 free_netdev(slave_dev);
1132 }
1133
1134 static bool dsa_slave_dev_check(struct net_device *dev)
1135 {
1136 return dev->netdev_ops == &dsa_slave_netdev_ops;
1137 }
1138
1139 static int dsa_slave_port_upper_event(struct net_device *dev,
1140 unsigned long event, void *ptr)
1141 {
1142 struct netdev_notifier_changeupper_info *info = ptr;
1143 struct net_device *upper = info->upper_dev;
1144 int err = 0;
1145
1146 switch (event) {
1147 case NETDEV_CHANGEUPPER:
1148 if (netif_is_bridge_master(upper)) {
1149 if (info->linking)
1150 err = dsa_slave_bridge_port_join(dev, upper);
1151 else
1152 dsa_slave_bridge_port_leave(dev);
1153 }
1154
1155 break;
1156 }
1157
1158 return notifier_from_errno(err);
1159 }
1160
1161 static int dsa_slave_port_event(struct net_device *dev, unsigned long event,
1162 void *ptr)
1163 {
1164 switch (event) {
1165 case NETDEV_CHANGEUPPER:
1166 return dsa_slave_port_upper_event(dev, event, ptr);
1167 }
1168
1169 return NOTIFY_DONE;
1170 }
1171
1172 int dsa_slave_netdevice_event(struct notifier_block *unused,
1173 unsigned long event, void *ptr)
1174 {
1175 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1176
1177 if (dsa_slave_dev_check(dev))
1178 return dsa_slave_port_event(dev, event, ptr);
1179
1180 return NOTIFY_DONE;
1181 }
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