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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 <net/rtnetlink.h>
19 #include <net/switchdev.h>
20 #include <linux/if_bridge.h>
21 #include "dsa_priv.h"
22
23 /* slave mii_bus handling ***************************************************/
24 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
25 {
26 struct dsa_switch *ds = bus->priv;
27
28 if (ds->phys_mii_mask & (1 << addr))
29 return ds->drv->phy_read(ds, addr, reg);
30
31 return 0xffff;
32 }
33
34 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
35 {
36 struct dsa_switch *ds = bus->priv;
37
38 if (ds->phys_mii_mask & (1 << addr))
39 return ds->drv->phy_write(ds, addr, reg, val);
40
41 return 0;
42 }
43
44 void dsa_slave_mii_bus_init(struct dsa_switch *ds)
45 {
46 ds->slave_mii_bus->priv = (void *)ds;
47 ds->slave_mii_bus->name = "dsa slave smi";
48 ds->slave_mii_bus->read = dsa_slave_phy_read;
49 ds->slave_mii_bus->write = dsa_slave_phy_write;
50 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x",
51 ds->index, ds->pd->sw_addr);
52 ds->slave_mii_bus->parent = ds->master_dev;
53 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
54 }
55
56
57 /* slave device handling ****************************************************/
58 static int dsa_slave_get_iflink(const struct net_device *dev)
59 {
60 struct dsa_slave_priv *p = netdev_priv(dev);
61
62 return p->parent->dst->master_netdev->ifindex;
63 }
64
65 static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p)
66 {
67 return !!p->bridge_dev;
68 }
69
70 static int dsa_slave_open(struct net_device *dev)
71 {
72 struct dsa_slave_priv *p = netdev_priv(dev);
73 struct net_device *master = p->parent->dst->master_netdev;
74 struct dsa_switch *ds = p->parent;
75 u8 stp_state = dsa_port_is_bridged(p) ?
76 BR_STATE_BLOCKING : BR_STATE_FORWARDING;
77 int err;
78
79 if (!(master->flags & IFF_UP))
80 return -ENETDOWN;
81
82 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
83 err = dev_uc_add(master, dev->dev_addr);
84 if (err < 0)
85 goto out;
86 }
87
88 if (dev->flags & IFF_ALLMULTI) {
89 err = dev_set_allmulti(master, 1);
90 if (err < 0)
91 goto del_unicast;
92 }
93 if (dev->flags & IFF_PROMISC) {
94 err = dev_set_promiscuity(master, 1);
95 if (err < 0)
96 goto clear_allmulti;
97 }
98
99 if (ds->drv->port_enable) {
100 err = ds->drv->port_enable(ds, p->port, p->phy);
101 if (err)
102 goto clear_promisc;
103 }
104
105 if (ds->drv->port_stp_update)
106 ds->drv->port_stp_update(ds, p->port, stp_state);
107
108 if (p->phy)
109 phy_start(p->phy);
110
111 return 0;
112
113 clear_promisc:
114 if (dev->flags & IFF_PROMISC)
115 dev_set_promiscuity(master, -1);
116 clear_allmulti:
117 if (dev->flags & IFF_ALLMULTI)
118 dev_set_allmulti(master, -1);
119 del_unicast:
120 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
121 dev_uc_del(master, dev->dev_addr);
122 out:
123 return err;
124 }
125
126 static int dsa_slave_close(struct net_device *dev)
127 {
128 struct dsa_slave_priv *p = netdev_priv(dev);
129 struct net_device *master = p->parent->dst->master_netdev;
130 struct dsa_switch *ds = p->parent;
131
132 if (p->phy)
133 phy_stop(p->phy);
134
135 dev_mc_unsync(master, dev);
136 dev_uc_unsync(master, dev);
137 if (dev->flags & IFF_ALLMULTI)
138 dev_set_allmulti(master, -1);
139 if (dev->flags & IFF_PROMISC)
140 dev_set_promiscuity(master, -1);
141
142 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
143 dev_uc_del(master, dev->dev_addr);
144
145 if (ds->drv->port_disable)
146 ds->drv->port_disable(ds, p->port, p->phy);
147
148 if (ds->drv->port_stp_update)
149 ds->drv->port_stp_update(ds, p->port, BR_STATE_DISABLED);
150
151 return 0;
152 }
153
154 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
155 {
156 struct dsa_slave_priv *p = netdev_priv(dev);
157 struct net_device *master = p->parent->dst->master_netdev;
158
159 if (change & IFF_ALLMULTI)
160 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
161 if (change & IFF_PROMISC)
162 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
163 }
164
165 static void dsa_slave_set_rx_mode(struct net_device *dev)
166 {
167 struct dsa_slave_priv *p = netdev_priv(dev);
168 struct net_device *master = p->parent->dst->master_netdev;
169
170 dev_mc_sync(master, dev);
171 dev_uc_sync(master, dev);
172 }
173
174 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
175 {
176 struct dsa_slave_priv *p = netdev_priv(dev);
177 struct net_device *master = p->parent->dst->master_netdev;
178 struct sockaddr *addr = a;
179 int err;
180
181 if (!is_valid_ether_addr(addr->sa_data))
182 return -EADDRNOTAVAIL;
183
184 if (!(dev->flags & IFF_UP))
185 goto out;
186
187 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
188 err = dev_uc_add(master, addr->sa_data);
189 if (err < 0)
190 return err;
191 }
192
193 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
194 dev_uc_del(master, dev->dev_addr);
195
196 out:
197 ether_addr_copy(dev->dev_addr, addr->sa_data);
198
199 return 0;
200 }
201
202 static int dsa_slave_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
203 struct net_device *dev,
204 const unsigned char *addr, u16 vid, u16 nlm_flags)
205 {
206 struct dsa_slave_priv *p = netdev_priv(dev);
207 struct dsa_switch *ds = p->parent;
208 int ret = -EOPNOTSUPP;
209
210 if (ds->drv->fdb_add)
211 ret = ds->drv->fdb_add(ds, p->port, addr, vid);
212
213 return ret;
214 }
215
216 static int dsa_slave_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
217 struct net_device *dev,
218 const unsigned char *addr, u16 vid)
219 {
220 struct dsa_slave_priv *p = netdev_priv(dev);
221 struct dsa_switch *ds = p->parent;
222 int ret = -EOPNOTSUPP;
223
224 if (ds->drv->fdb_del)
225 ret = ds->drv->fdb_del(ds, p->port, addr, vid);
226
227 return ret;
228 }
229
230 static int dsa_slave_fill_info(struct net_device *dev, struct sk_buff *skb,
231 const unsigned char *addr, u16 vid,
232 bool is_static,
233 u32 portid, u32 seq, int type,
234 unsigned int flags)
235 {
236 struct nlmsghdr *nlh;
237 struct ndmsg *ndm;
238
239 nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
240 if (!nlh)
241 return -EMSGSIZE;
242
243 ndm = nlmsg_data(nlh);
244 ndm->ndm_family = AF_BRIDGE;
245 ndm->ndm_pad1 = 0;
246 ndm->ndm_pad2 = 0;
247 ndm->ndm_flags = NTF_EXT_LEARNED;
248 ndm->ndm_type = 0;
249 ndm->ndm_ifindex = dev->ifindex;
250 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
251
252 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
253 goto nla_put_failure;
254
255 if (vid && nla_put_u16(skb, NDA_VLAN, vid))
256 goto nla_put_failure;
257
258 nlmsg_end(skb, nlh);
259 return 0;
260
261 nla_put_failure:
262 nlmsg_cancel(skb, nlh);
263 return -EMSGSIZE;
264 }
265
266 /* Dump information about entries, in response to GETNEIGH */
267 static int dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
268 struct net_device *dev,
269 struct net_device *filter_dev, int idx)
270 {
271 struct dsa_slave_priv *p = netdev_priv(dev);
272 struct dsa_switch *ds = p->parent;
273 unsigned char addr[ETH_ALEN] = { 0 };
274 int ret;
275
276 if (!ds->drv->fdb_getnext)
277 return -EOPNOTSUPP;
278
279 for (; ; idx++) {
280 bool is_static;
281
282 ret = ds->drv->fdb_getnext(ds, p->port, addr, &is_static);
283 if (ret < 0)
284 break;
285
286 if (idx < cb->args[0])
287 continue;
288
289 ret = dsa_slave_fill_info(dev, skb, addr, 0,
290 is_static,
291 NETLINK_CB(cb->skb).portid,
292 cb->nlh->nlmsg_seq,
293 RTM_NEWNEIGH, NLM_F_MULTI);
294 if (ret < 0)
295 break;
296 }
297
298 return idx;
299 }
300
301 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
302 {
303 struct dsa_slave_priv *p = netdev_priv(dev);
304
305 if (p->phy != NULL)
306 return phy_mii_ioctl(p->phy, ifr, cmd);
307
308 return -EOPNOTSUPP;
309 }
310
311 /* Return a bitmask of all ports being currently bridged within a given bridge
312 * device. Note that on leave, the mask will still return the bitmask of ports
313 * currently bridged, prior to port removal, and this is exactly what we want.
314 */
315 static u32 dsa_slave_br_port_mask(struct dsa_switch *ds,
316 struct net_device *bridge)
317 {
318 struct dsa_slave_priv *p;
319 unsigned int port;
320 u32 mask = 0;
321
322 for (port = 0; port < DSA_MAX_PORTS; port++) {
323 if (!dsa_is_port_initialized(ds, port))
324 continue;
325
326 p = netdev_priv(ds->ports[port]);
327
328 if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT &&
329 p->bridge_dev == bridge)
330 mask |= 1 << port;
331 }
332
333 return mask;
334 }
335
336 static int dsa_slave_stp_update(struct net_device *dev, u8 state)
337 {
338 struct dsa_slave_priv *p = netdev_priv(dev);
339 struct dsa_switch *ds = p->parent;
340 int ret = -EOPNOTSUPP;
341
342 if (ds->drv->port_stp_update)
343 ret = ds->drv->port_stp_update(ds, p->port, state);
344
345 return ret;
346 }
347
348 static int dsa_slave_port_attr_set(struct net_device *dev,
349 struct switchdev_attr *attr)
350 {
351 int ret = 0;
352
353 switch (attr->id) {
354 case SWITCHDEV_ATTR_PORT_STP_STATE:
355 if (attr->trans == SWITCHDEV_TRANS_COMMIT)
356 ret = dsa_slave_stp_update(dev, attr->u.stp_state);
357 break;
358 default:
359 ret = -EOPNOTSUPP;
360 break;
361 }
362
363 return ret;
364 }
365
366 static int dsa_slave_bridge_port_join(struct net_device *dev,
367 struct net_device *br)
368 {
369 struct dsa_slave_priv *p = netdev_priv(dev);
370 struct dsa_switch *ds = p->parent;
371 int ret = -EOPNOTSUPP;
372
373 p->bridge_dev = br;
374
375 if (ds->drv->port_join_bridge)
376 ret = ds->drv->port_join_bridge(ds, p->port,
377 dsa_slave_br_port_mask(ds, br));
378
379 return ret;
380 }
381
382 static int dsa_slave_bridge_port_leave(struct net_device *dev)
383 {
384 struct dsa_slave_priv *p = netdev_priv(dev);
385 struct dsa_switch *ds = p->parent;
386 int ret = -EOPNOTSUPP;
387
388
389 if (ds->drv->port_leave_bridge)
390 ret = ds->drv->port_leave_bridge(ds, p->port,
391 dsa_slave_br_port_mask(ds, p->bridge_dev));
392
393 p->bridge_dev = NULL;
394
395 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
396 * so allow it to be in BR_STATE_FORWARDING to be kept functional
397 */
398 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
399
400 return ret;
401 }
402
403 static int dsa_slave_port_attr_get(struct net_device *dev,
404 struct switchdev_attr *attr)
405 {
406 struct dsa_slave_priv *p = netdev_priv(dev);
407 struct dsa_switch *ds = p->parent;
408
409 switch (attr->id) {
410 case SWITCHDEV_ATTR_PORT_PARENT_ID:
411 attr->u.ppid.id_len = sizeof(ds->index);
412 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
413 break;
414 default:
415 return -EOPNOTSUPP;
416 }
417
418 return 0;
419 }
420
421 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
422 {
423 struct dsa_slave_priv *p = netdev_priv(dev);
424
425 return p->xmit(skb, dev);
426 }
427
428 static netdev_tx_t dsa_slave_notag_xmit(struct sk_buff *skb,
429 struct net_device *dev)
430 {
431 struct dsa_slave_priv *p = netdev_priv(dev);
432
433 skb->dev = p->parent->dst->master_netdev;
434 dev_queue_xmit(skb);
435
436 return NETDEV_TX_OK;
437 }
438
439
440 /* ethtool operations *******************************************************/
441 static int
442 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
443 {
444 struct dsa_slave_priv *p = netdev_priv(dev);
445 int err;
446
447 err = -EOPNOTSUPP;
448 if (p->phy != NULL) {
449 err = phy_read_status(p->phy);
450 if (err == 0)
451 err = phy_ethtool_gset(p->phy, cmd);
452 }
453
454 return err;
455 }
456
457 static int
458 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
459 {
460 struct dsa_slave_priv *p = netdev_priv(dev);
461
462 if (p->phy != NULL)
463 return phy_ethtool_sset(p->phy, cmd);
464
465 return -EOPNOTSUPP;
466 }
467
468 static void dsa_slave_get_drvinfo(struct net_device *dev,
469 struct ethtool_drvinfo *drvinfo)
470 {
471 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
472 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
473 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
474 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
475 }
476
477 static int dsa_slave_get_regs_len(struct net_device *dev)
478 {
479 struct dsa_slave_priv *p = netdev_priv(dev);
480 struct dsa_switch *ds = p->parent;
481
482 if (ds->drv->get_regs_len)
483 return ds->drv->get_regs_len(ds, p->port);
484
485 return -EOPNOTSUPP;
486 }
487
488 static void
489 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
490 {
491 struct dsa_slave_priv *p = netdev_priv(dev);
492 struct dsa_switch *ds = p->parent;
493
494 if (ds->drv->get_regs)
495 ds->drv->get_regs(ds, p->port, regs, _p);
496 }
497
498 static int dsa_slave_nway_reset(struct net_device *dev)
499 {
500 struct dsa_slave_priv *p = netdev_priv(dev);
501
502 if (p->phy != NULL)
503 return genphy_restart_aneg(p->phy);
504
505 return -EOPNOTSUPP;
506 }
507
508 static u32 dsa_slave_get_link(struct net_device *dev)
509 {
510 struct dsa_slave_priv *p = netdev_priv(dev);
511
512 if (p->phy != NULL) {
513 genphy_update_link(p->phy);
514 return p->phy->link;
515 }
516
517 return -EOPNOTSUPP;
518 }
519
520 static int dsa_slave_get_eeprom_len(struct net_device *dev)
521 {
522 struct dsa_slave_priv *p = netdev_priv(dev);
523 struct dsa_switch *ds = p->parent;
524
525 if (ds->pd->eeprom_len)
526 return ds->pd->eeprom_len;
527
528 if (ds->drv->get_eeprom_len)
529 return ds->drv->get_eeprom_len(ds);
530
531 return 0;
532 }
533
534 static int dsa_slave_get_eeprom(struct net_device *dev,
535 struct ethtool_eeprom *eeprom, u8 *data)
536 {
537 struct dsa_slave_priv *p = netdev_priv(dev);
538 struct dsa_switch *ds = p->parent;
539
540 if (ds->drv->get_eeprom)
541 return ds->drv->get_eeprom(ds, eeprom, data);
542
543 return -EOPNOTSUPP;
544 }
545
546 static int dsa_slave_set_eeprom(struct net_device *dev,
547 struct ethtool_eeprom *eeprom, u8 *data)
548 {
549 struct dsa_slave_priv *p = netdev_priv(dev);
550 struct dsa_switch *ds = p->parent;
551
552 if (ds->drv->set_eeprom)
553 return ds->drv->set_eeprom(ds, eeprom, data);
554
555 return -EOPNOTSUPP;
556 }
557
558 static void dsa_slave_get_strings(struct net_device *dev,
559 uint32_t stringset, uint8_t *data)
560 {
561 struct dsa_slave_priv *p = netdev_priv(dev);
562 struct dsa_switch *ds = p->parent;
563
564 if (stringset == ETH_SS_STATS) {
565 int len = ETH_GSTRING_LEN;
566
567 strncpy(data, "tx_packets", len);
568 strncpy(data + len, "tx_bytes", len);
569 strncpy(data + 2 * len, "rx_packets", len);
570 strncpy(data + 3 * len, "rx_bytes", len);
571 if (ds->drv->get_strings != NULL)
572 ds->drv->get_strings(ds, p->port, data + 4 * len);
573 }
574 }
575
576 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
577 struct ethtool_stats *stats,
578 uint64_t *data)
579 {
580 struct dsa_slave_priv *p = netdev_priv(dev);
581 struct dsa_switch *ds = p->parent;
582
583 data[0] = p->dev->stats.tx_packets;
584 data[1] = p->dev->stats.tx_bytes;
585 data[2] = p->dev->stats.rx_packets;
586 data[3] = p->dev->stats.rx_bytes;
587 if (ds->drv->get_ethtool_stats != NULL)
588 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
589 }
590
591 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
592 {
593 struct dsa_slave_priv *p = netdev_priv(dev);
594 struct dsa_switch *ds = p->parent;
595
596 if (sset == ETH_SS_STATS) {
597 int count;
598
599 count = 4;
600 if (ds->drv->get_sset_count != NULL)
601 count += ds->drv->get_sset_count(ds);
602
603 return count;
604 }
605
606 return -EOPNOTSUPP;
607 }
608
609 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
610 {
611 struct dsa_slave_priv *p = netdev_priv(dev);
612 struct dsa_switch *ds = p->parent;
613
614 if (ds->drv->get_wol)
615 ds->drv->get_wol(ds, p->port, w);
616 }
617
618 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
619 {
620 struct dsa_slave_priv *p = netdev_priv(dev);
621 struct dsa_switch *ds = p->parent;
622 int ret = -EOPNOTSUPP;
623
624 if (ds->drv->set_wol)
625 ret = ds->drv->set_wol(ds, p->port, w);
626
627 return ret;
628 }
629
630 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
631 {
632 struct dsa_slave_priv *p = netdev_priv(dev);
633 struct dsa_switch *ds = p->parent;
634 int ret;
635
636 if (!ds->drv->set_eee)
637 return -EOPNOTSUPP;
638
639 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
640 if (ret)
641 return ret;
642
643 if (p->phy)
644 ret = phy_ethtool_set_eee(p->phy, e);
645
646 return ret;
647 }
648
649 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
650 {
651 struct dsa_slave_priv *p = netdev_priv(dev);
652 struct dsa_switch *ds = p->parent;
653 int ret;
654
655 if (!ds->drv->get_eee)
656 return -EOPNOTSUPP;
657
658 ret = ds->drv->get_eee(ds, p->port, e);
659 if (ret)
660 return ret;
661
662 if (p->phy)
663 ret = phy_ethtool_get_eee(p->phy, e);
664
665 return ret;
666 }
667
668 static const struct ethtool_ops dsa_slave_ethtool_ops = {
669 .get_settings = dsa_slave_get_settings,
670 .set_settings = dsa_slave_set_settings,
671 .get_drvinfo = dsa_slave_get_drvinfo,
672 .get_regs_len = dsa_slave_get_regs_len,
673 .get_regs = dsa_slave_get_regs,
674 .nway_reset = dsa_slave_nway_reset,
675 .get_link = dsa_slave_get_link,
676 .get_eeprom_len = dsa_slave_get_eeprom_len,
677 .get_eeprom = dsa_slave_get_eeprom,
678 .set_eeprom = dsa_slave_set_eeprom,
679 .get_strings = dsa_slave_get_strings,
680 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
681 .get_sset_count = dsa_slave_get_sset_count,
682 .set_wol = dsa_slave_set_wol,
683 .get_wol = dsa_slave_get_wol,
684 .set_eee = dsa_slave_set_eee,
685 .get_eee = dsa_slave_get_eee,
686 };
687
688 static const struct net_device_ops dsa_slave_netdev_ops = {
689 .ndo_open = dsa_slave_open,
690 .ndo_stop = dsa_slave_close,
691 .ndo_start_xmit = dsa_slave_xmit,
692 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
693 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
694 .ndo_set_mac_address = dsa_slave_set_mac_address,
695 .ndo_fdb_add = dsa_slave_fdb_add,
696 .ndo_fdb_del = dsa_slave_fdb_del,
697 .ndo_fdb_dump = dsa_slave_fdb_dump,
698 .ndo_do_ioctl = dsa_slave_ioctl,
699 .ndo_get_iflink = dsa_slave_get_iflink,
700 };
701
702 static const struct switchdev_ops dsa_slave_switchdev_ops = {
703 .switchdev_port_attr_get = dsa_slave_port_attr_get,
704 .switchdev_port_attr_set = dsa_slave_port_attr_set,
705 };
706
707 static void dsa_slave_adjust_link(struct net_device *dev)
708 {
709 struct dsa_slave_priv *p = netdev_priv(dev);
710 struct dsa_switch *ds = p->parent;
711 unsigned int status_changed = 0;
712
713 if (p->old_link != p->phy->link) {
714 status_changed = 1;
715 p->old_link = p->phy->link;
716 }
717
718 if (p->old_duplex != p->phy->duplex) {
719 status_changed = 1;
720 p->old_duplex = p->phy->duplex;
721 }
722
723 if (p->old_pause != p->phy->pause) {
724 status_changed = 1;
725 p->old_pause = p->phy->pause;
726 }
727
728 if (ds->drv->adjust_link && status_changed)
729 ds->drv->adjust_link(ds, p->port, p->phy);
730
731 if (status_changed)
732 phy_print_status(p->phy);
733 }
734
735 static int dsa_slave_fixed_link_update(struct net_device *dev,
736 struct fixed_phy_status *status)
737 {
738 struct dsa_slave_priv *p = netdev_priv(dev);
739 struct dsa_switch *ds = p->parent;
740
741 if (ds->drv->fixed_link_update)
742 ds->drv->fixed_link_update(ds, p->port, status);
743
744 return 0;
745 }
746
747 /* slave device setup *******************************************************/
748 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
749 struct net_device *slave_dev,
750 int addr)
751 {
752 struct dsa_switch *ds = p->parent;
753
754 p->phy = ds->slave_mii_bus->phy_map[addr];
755 if (!p->phy)
756 return -ENODEV;
757
758 /* Use already configured phy mode */
759 p->phy_interface = p->phy->interface;
760 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
761 p->phy_interface);
762
763 return 0;
764 }
765
766 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
767 struct net_device *slave_dev)
768 {
769 struct dsa_switch *ds = p->parent;
770 struct dsa_chip_data *cd = ds->pd;
771 struct device_node *phy_dn, *port_dn;
772 bool phy_is_fixed = false;
773 u32 phy_flags = 0;
774 int mode, ret;
775
776 port_dn = cd->port_dn[p->port];
777 mode = of_get_phy_mode(port_dn);
778 if (mode < 0)
779 mode = PHY_INTERFACE_MODE_NA;
780 p->phy_interface = mode;
781
782 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
783 if (of_phy_is_fixed_link(port_dn)) {
784 /* In the case of a fixed PHY, the DT node associated
785 * to the fixed PHY is the Port DT node
786 */
787 ret = of_phy_register_fixed_link(port_dn);
788 if (ret) {
789 netdev_err(slave_dev, "failed to register fixed PHY\n");
790 return ret;
791 }
792 phy_is_fixed = true;
793 phy_dn = port_dn;
794 }
795
796 if (ds->drv->get_phy_flags)
797 phy_flags = ds->drv->get_phy_flags(ds, p->port);
798
799 if (phy_dn) {
800 ret = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
801 /* If this PHY address is part of phys_mii_mask, which means
802 * that we need to divert reads and writes to/from it, then we
803 * want to bind this device using the slave MII bus created by
804 * DSA to make that happen.
805 */
806 if (!phy_is_fixed && ret >= 0 &&
807 (ds->phys_mii_mask & (1 << ret))) {
808 ret = dsa_slave_phy_connect(p, slave_dev, ret);
809 if (ret)
810 return ret;
811 } else {
812 p->phy = of_phy_connect(slave_dev, phy_dn,
813 dsa_slave_adjust_link,
814 phy_flags,
815 p->phy_interface);
816 }
817 }
818
819 if (p->phy && phy_is_fixed)
820 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
821
822 /* We could not connect to a designated PHY, so use the switch internal
823 * MDIO bus instead
824 */
825 if (!p->phy) {
826 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
827 if (ret)
828 return ret;
829 } else {
830 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
831 p->phy->addr, p->phy->drv->name);
832 }
833
834 return 0;
835 }
836
837 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
838 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
839 struct netdev_queue *txq,
840 void *_unused)
841 {
842 lockdep_set_class(&txq->_xmit_lock,
843 &dsa_slave_netdev_xmit_lock_key);
844 }
845
846 int dsa_slave_suspend(struct net_device *slave_dev)
847 {
848 struct dsa_slave_priv *p = netdev_priv(slave_dev);
849
850 if (p->phy) {
851 phy_stop(p->phy);
852 p->old_pause = -1;
853 p->old_link = -1;
854 p->old_duplex = -1;
855 phy_suspend(p->phy);
856 }
857
858 return 0;
859 }
860
861 int dsa_slave_resume(struct net_device *slave_dev)
862 {
863 struct dsa_slave_priv *p = netdev_priv(slave_dev);
864
865 netif_device_attach(slave_dev);
866
867 if (p->phy) {
868 phy_resume(p->phy);
869 phy_start(p->phy);
870 }
871
872 return 0;
873 }
874
875 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
876 int port, char *name)
877 {
878 struct net_device *master = ds->dst->master_netdev;
879 struct net_device *slave_dev;
880 struct dsa_slave_priv *p;
881 int ret;
882
883 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
884 NET_NAME_UNKNOWN, ether_setup);
885 if (slave_dev == NULL)
886 return -ENOMEM;
887
888 slave_dev->features = master->vlan_features;
889 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
890 eth_hw_addr_inherit(slave_dev, master);
891 slave_dev->tx_queue_len = 0;
892 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
893 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
894
895 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
896 NULL);
897
898 SET_NETDEV_DEV(slave_dev, parent);
899 slave_dev->dev.of_node = ds->pd->port_dn[port];
900 slave_dev->vlan_features = master->vlan_features;
901
902 p = netdev_priv(slave_dev);
903 p->dev = slave_dev;
904 p->parent = ds;
905 p->port = port;
906
907 switch (ds->dst->tag_protocol) {
908 #ifdef CONFIG_NET_DSA_TAG_DSA
909 case DSA_TAG_PROTO_DSA:
910 p->xmit = dsa_netdev_ops.xmit;
911 break;
912 #endif
913 #ifdef CONFIG_NET_DSA_TAG_EDSA
914 case DSA_TAG_PROTO_EDSA:
915 p->xmit = edsa_netdev_ops.xmit;
916 break;
917 #endif
918 #ifdef CONFIG_NET_DSA_TAG_TRAILER
919 case DSA_TAG_PROTO_TRAILER:
920 p->xmit = trailer_netdev_ops.xmit;
921 break;
922 #endif
923 #ifdef CONFIG_NET_DSA_TAG_BRCM
924 case DSA_TAG_PROTO_BRCM:
925 p->xmit = brcm_netdev_ops.xmit;
926 break;
927 #endif
928 default:
929 p->xmit = dsa_slave_notag_xmit;
930 break;
931 }
932
933 p->old_pause = -1;
934 p->old_link = -1;
935 p->old_duplex = -1;
936
937 ret = dsa_slave_phy_setup(p, slave_dev);
938 if (ret) {
939 free_netdev(slave_dev);
940 return ret;
941 }
942
943 ds->ports[port] = slave_dev;
944 ret = register_netdev(slave_dev);
945 if (ret) {
946 netdev_err(master, "error %d registering interface %s\n",
947 ret, slave_dev->name);
948 phy_disconnect(p->phy);
949 ds->ports[port] = NULL;
950 free_netdev(slave_dev);
951 return ret;
952 }
953
954 netif_carrier_off(slave_dev);
955
956 return 0;
957 }
958
959 static bool dsa_slave_dev_check(struct net_device *dev)
960 {
961 return dev->netdev_ops == &dsa_slave_netdev_ops;
962 }
963
964 static int dsa_slave_master_changed(struct net_device *dev)
965 {
966 struct net_device *master = netdev_master_upper_dev_get(dev);
967 struct dsa_slave_priv *p = netdev_priv(dev);
968 int err = 0;
969
970 if (master && master->rtnl_link_ops &&
971 !strcmp(master->rtnl_link_ops->kind, "bridge"))
972 err = dsa_slave_bridge_port_join(dev, master);
973 else if (dsa_port_is_bridged(p))
974 err = dsa_slave_bridge_port_leave(dev);
975
976 return err;
977 }
978
979 int dsa_slave_netdevice_event(struct notifier_block *unused,
980 unsigned long event, void *ptr)
981 {
982 struct net_device *dev;
983 int err = 0;
984
985 switch (event) {
986 case NETDEV_CHANGEUPPER:
987 dev = netdev_notifier_info_to_dev(ptr);
988 if (!dsa_slave_dev_check(dev))
989 goto out;
990
991 err = dsa_slave_master_changed(dev);
992 if (err)
993 netdev_warn(dev, "failed to reflect master change\n");
994
995 break;
996 }
997
998 out:
999 return NOTIFY_DONE;
1000 }
Linux kernel - Deliverables
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