]> git.proxmox.com Git - mirror_ubuntu-hirsute-kernel.git/blob - net/dsa/slave.c
projects / mirror_ubuntu-hirsute-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'swdev_ops'
[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 <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_init(struct net_device *dev)
59 {
60 struct dsa_slave_priv *p = netdev_priv(dev);
61
62 dev->iflink = p->parent->dst->master_netdev->ifindex;
63
64 return 0;
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, 0);
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_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
205 {
206 struct dsa_slave_priv *p = netdev_priv(dev);
207
208 if (p->phy != NULL)
209 return phy_mii_ioctl(p->phy, ifr, cmd);
210
211 return -EOPNOTSUPP;
212 }
213
214 /* Return a bitmask of all ports being currently bridged within a given bridge
215 * device. Note that on leave, the mask will still return the bitmask of ports
216 * currently bridged, prior to port removal, and this is exactly what we want.
217 */
218 static u32 dsa_slave_br_port_mask(struct dsa_switch *ds,
219 struct net_device *bridge)
220 {
221 struct dsa_slave_priv *p;
222 unsigned int port;
223 u32 mask = 0;
224
225 for (port = 0; port < DSA_MAX_PORTS; port++) {
226 if (!dsa_is_port_initialized(ds, port))
227 continue;
228
229 p = netdev_priv(ds->ports[port]);
230
231 if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT &&
232 p->bridge_dev == bridge)
233 mask |= 1 << port;
234 }
235
236 return mask;
237 }
238
239 static int dsa_slave_stp_update(struct net_device *dev, u8 state)
240 {
241 struct dsa_slave_priv *p = netdev_priv(dev);
242 struct dsa_switch *ds = p->parent;
243 int ret = -EOPNOTSUPP;
244
245 if (ds->drv->port_stp_update)
246 ret = ds->drv->port_stp_update(ds, p->port, state);
247
248 return ret;
249 }
250
251 static int dsa_slave_bridge_port_join(struct net_device *dev,
252 struct net_device *br)
253 {
254 struct dsa_slave_priv *p = netdev_priv(dev);
255 struct dsa_switch *ds = p->parent;
256 int ret = -EOPNOTSUPP;
257
258 p->bridge_dev = br;
259
260 if (ds->drv->port_join_bridge)
261 ret = ds->drv->port_join_bridge(ds, p->port,
262 dsa_slave_br_port_mask(ds, br));
263
264 return ret;
265 }
266
267 static int dsa_slave_bridge_port_leave(struct net_device *dev)
268 {
269 struct dsa_slave_priv *p = netdev_priv(dev);
270 struct dsa_switch *ds = p->parent;
271 int ret = -EOPNOTSUPP;
272
273
274 if (ds->drv->port_leave_bridge)
275 ret = ds->drv->port_leave_bridge(ds, p->port,
276 dsa_slave_br_port_mask(ds, p->bridge_dev));
277
278 p->bridge_dev = NULL;
279
280 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
281 * so allow it to be in BR_STATE_FORWARDING to be kept functional
282 */
283 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
284
285 return ret;
286 }
287
288 static int dsa_slave_parent_id_get(struct net_device *dev,
289 struct netdev_phys_item_id *psid)
290 {
291 struct dsa_slave_priv *p = netdev_priv(dev);
292 struct dsa_switch *ds = p->parent;
293
294 psid->id_len = sizeof(ds->index);
295 memcpy(&psid->id, &ds->index, psid->id_len);
296
297 return 0;
298 }
299
300 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
301 {
302 struct dsa_slave_priv *p = netdev_priv(dev);
303
304 return p->xmit(skb, dev);
305 }
306
307 static netdev_tx_t dsa_slave_notag_xmit(struct sk_buff *skb,
308 struct net_device *dev)
309 {
310 struct dsa_slave_priv *p = netdev_priv(dev);
311
312 skb->dev = p->parent->dst->master_netdev;
313 dev_queue_xmit(skb);
314
315 return NETDEV_TX_OK;
316 }
317
318
319 /* ethtool operations *******************************************************/
320 static int
321 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
322 {
323 struct dsa_slave_priv *p = netdev_priv(dev);
324 int err;
325
326 err = -EOPNOTSUPP;
327 if (p->phy != NULL) {
328 err = phy_read_status(p->phy);
329 if (err == 0)
330 err = phy_ethtool_gset(p->phy, cmd);
331 }
332
333 return err;
334 }
335
336 static int
337 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
338 {
339 struct dsa_slave_priv *p = netdev_priv(dev);
340
341 if (p->phy != NULL)
342 return phy_ethtool_sset(p->phy, cmd);
343
344 return -EOPNOTSUPP;
345 }
346
347 static void dsa_slave_get_drvinfo(struct net_device *dev,
348 struct ethtool_drvinfo *drvinfo)
349 {
350 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
351 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
352 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
353 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
354 }
355
356 static int dsa_slave_get_regs_len(struct net_device *dev)
357 {
358 struct dsa_slave_priv *p = netdev_priv(dev);
359 struct dsa_switch *ds = p->parent;
360
361 if (ds->drv->get_regs_len)
362 return ds->drv->get_regs_len(ds, p->port);
363
364 return -EOPNOTSUPP;
365 }
366
367 static void
368 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
369 {
370 struct dsa_slave_priv *p = netdev_priv(dev);
371 struct dsa_switch *ds = p->parent;
372
373 if (ds->drv->get_regs)
374 ds->drv->get_regs(ds, p->port, regs, _p);
375 }
376
377 static int dsa_slave_nway_reset(struct net_device *dev)
378 {
379 struct dsa_slave_priv *p = netdev_priv(dev);
380
381 if (p->phy != NULL)
382 return genphy_restart_aneg(p->phy);
383
384 return -EOPNOTSUPP;
385 }
386
387 static u32 dsa_slave_get_link(struct net_device *dev)
388 {
389 struct dsa_slave_priv *p = netdev_priv(dev);
390
391 if (p->phy != NULL) {
392 genphy_update_link(p->phy);
393 return p->phy->link;
394 }
395
396 return -EOPNOTSUPP;
397 }
398
399 static int dsa_slave_get_eeprom_len(struct net_device *dev)
400 {
401 struct dsa_slave_priv *p = netdev_priv(dev);
402 struct dsa_switch *ds = p->parent;
403
404 if (ds->pd->eeprom_len)
405 return ds->pd->eeprom_len;
406
407 if (ds->drv->get_eeprom_len)
408 return ds->drv->get_eeprom_len(ds);
409
410 return 0;
411 }
412
413 static int dsa_slave_get_eeprom(struct net_device *dev,
414 struct ethtool_eeprom *eeprom, u8 *data)
415 {
416 struct dsa_slave_priv *p = netdev_priv(dev);
417 struct dsa_switch *ds = p->parent;
418
419 if (ds->drv->get_eeprom)
420 return ds->drv->get_eeprom(ds, eeprom, data);
421
422 return -EOPNOTSUPP;
423 }
424
425 static int dsa_slave_set_eeprom(struct net_device *dev,
426 struct ethtool_eeprom *eeprom, u8 *data)
427 {
428 struct dsa_slave_priv *p = netdev_priv(dev);
429 struct dsa_switch *ds = p->parent;
430
431 if (ds->drv->set_eeprom)
432 return ds->drv->set_eeprom(ds, eeprom, data);
433
434 return -EOPNOTSUPP;
435 }
436
437 static void dsa_slave_get_strings(struct net_device *dev,
438 uint32_t stringset, uint8_t *data)
439 {
440 struct dsa_slave_priv *p = netdev_priv(dev);
441 struct dsa_switch *ds = p->parent;
442
443 if (stringset == ETH_SS_STATS) {
444 int len = ETH_GSTRING_LEN;
445
446 strncpy(data, "tx_packets", len);
447 strncpy(data + len, "tx_bytes", len);
448 strncpy(data + 2 * len, "rx_packets", len);
449 strncpy(data + 3 * len, "rx_bytes", len);
450 if (ds->drv->get_strings != NULL)
451 ds->drv->get_strings(ds, p->port, data + 4 * len);
452 }
453 }
454
455 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
456 struct ethtool_stats *stats,
457 uint64_t *data)
458 {
459 struct dsa_slave_priv *p = netdev_priv(dev);
460 struct dsa_switch *ds = p->parent;
461
462 data[0] = p->dev->stats.tx_packets;
463 data[1] = p->dev->stats.tx_bytes;
464 data[2] = p->dev->stats.rx_packets;
465 data[3] = p->dev->stats.rx_bytes;
466 if (ds->drv->get_ethtool_stats != NULL)
467 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
468 }
469
470 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
471 {
472 struct dsa_slave_priv *p = netdev_priv(dev);
473 struct dsa_switch *ds = p->parent;
474
475 if (sset == ETH_SS_STATS) {
476 int count;
477
478 count = 4;
479 if (ds->drv->get_sset_count != NULL)
480 count += ds->drv->get_sset_count(ds);
481
482 return count;
483 }
484
485 return -EOPNOTSUPP;
486 }
487
488 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
489 {
490 struct dsa_slave_priv *p = netdev_priv(dev);
491 struct dsa_switch *ds = p->parent;
492
493 if (ds->drv->get_wol)
494 ds->drv->get_wol(ds, p->port, w);
495 }
496
497 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
498 {
499 struct dsa_slave_priv *p = netdev_priv(dev);
500 struct dsa_switch *ds = p->parent;
501 int ret = -EOPNOTSUPP;
502
503 if (ds->drv->set_wol)
504 ret = ds->drv->set_wol(ds, p->port, w);
505
506 return ret;
507 }
508
509 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
510 {
511 struct dsa_slave_priv *p = netdev_priv(dev);
512 struct dsa_switch *ds = p->parent;
513 int ret;
514
515 if (!ds->drv->set_eee)
516 return -EOPNOTSUPP;
517
518 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
519 if (ret)
520 return ret;
521
522 if (p->phy)
523 ret = phy_ethtool_set_eee(p->phy, e);
524
525 return ret;
526 }
527
528 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
529 {
530 struct dsa_slave_priv *p = netdev_priv(dev);
531 struct dsa_switch *ds = p->parent;
532 int ret;
533
534 if (!ds->drv->get_eee)
535 return -EOPNOTSUPP;
536
537 ret = ds->drv->get_eee(ds, p->port, e);
538 if (ret)
539 return ret;
540
541 if (p->phy)
542 ret = phy_ethtool_get_eee(p->phy, e);
543
544 return ret;
545 }
546
547 static const struct ethtool_ops dsa_slave_ethtool_ops = {
548 .get_settings = dsa_slave_get_settings,
549 .set_settings = dsa_slave_set_settings,
550 .get_drvinfo = dsa_slave_get_drvinfo,
551 .get_regs_len = dsa_slave_get_regs_len,
552 .get_regs = dsa_slave_get_regs,
553 .nway_reset = dsa_slave_nway_reset,
554 .get_link = dsa_slave_get_link,
555 .get_eeprom_len = dsa_slave_get_eeprom_len,
556 .get_eeprom = dsa_slave_get_eeprom,
557 .set_eeprom = dsa_slave_set_eeprom,
558 .get_strings = dsa_slave_get_strings,
559 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
560 .get_sset_count = dsa_slave_get_sset_count,
561 .set_wol = dsa_slave_set_wol,
562 .get_wol = dsa_slave_get_wol,
563 .set_eee = dsa_slave_set_eee,
564 .get_eee = dsa_slave_get_eee,
565 };
566
567 static const struct net_device_ops dsa_slave_netdev_ops = {
568 .ndo_init = dsa_slave_init,
569 .ndo_open = dsa_slave_open,
570 .ndo_stop = dsa_slave_close,
571 .ndo_start_xmit = dsa_slave_xmit,
572 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
573 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
574 .ndo_set_mac_address = dsa_slave_set_mac_address,
575 .ndo_do_ioctl = dsa_slave_ioctl,
576 };
577
578 static const struct swdev_ops dsa_slave_swdev_ops = {
579 .swdev_parent_id_get = dsa_slave_parent_id_get,
580 .swdev_port_stp_update = dsa_slave_stp_update,
581 };
582
583 static void dsa_slave_adjust_link(struct net_device *dev)
584 {
585 struct dsa_slave_priv *p = netdev_priv(dev);
586 struct dsa_switch *ds = p->parent;
587 unsigned int status_changed = 0;
588
589 if (p->old_link != p->phy->link) {
590 status_changed = 1;
591 p->old_link = p->phy->link;
592 }
593
594 if (p->old_duplex != p->phy->duplex) {
595 status_changed = 1;
596 p->old_duplex = p->phy->duplex;
597 }
598
599 if (p->old_pause != p->phy->pause) {
600 status_changed = 1;
601 p->old_pause = p->phy->pause;
602 }
603
604 if (ds->drv->adjust_link && status_changed)
605 ds->drv->adjust_link(ds, p->port, p->phy);
606
607 if (status_changed)
608 phy_print_status(p->phy);
609 }
610
611 static int dsa_slave_fixed_link_update(struct net_device *dev,
612 struct fixed_phy_status *status)
613 {
614 struct dsa_slave_priv *p = netdev_priv(dev);
615 struct dsa_switch *ds = p->parent;
616
617 if (ds->drv->fixed_link_update)
618 ds->drv->fixed_link_update(ds, p->port, status);
619
620 return 0;
621 }
622
623 /* slave device setup *******************************************************/
624 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
625 struct net_device *slave_dev,
626 int addr)
627 {
628 struct dsa_switch *ds = p->parent;
629
630 p->phy = ds->slave_mii_bus->phy_map[addr];
631 if (!p->phy)
632 return -ENODEV;
633
634 /* Use already configured phy mode */
635 p->phy_interface = p->phy->interface;
636 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
637 p->phy_interface);
638
639 return 0;
640 }
641
642 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
643 struct net_device *slave_dev)
644 {
645 struct dsa_switch *ds = p->parent;
646 struct dsa_chip_data *cd = ds->pd;
647 struct device_node *phy_dn, *port_dn;
648 bool phy_is_fixed = false;
649 u32 phy_flags = 0;
650 int mode, ret;
651
652 port_dn = cd->port_dn[p->port];
653 mode = of_get_phy_mode(port_dn);
654 if (mode < 0)
655 mode = PHY_INTERFACE_MODE_NA;
656 p->phy_interface = mode;
657
658 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
659 if (of_phy_is_fixed_link(port_dn)) {
660 /* In the case of a fixed PHY, the DT node associated
661 * to the fixed PHY is the Port DT node
662 */
663 ret = of_phy_register_fixed_link(port_dn);
664 if (ret) {
665 netdev_err(slave_dev, "failed to register fixed PHY\n");
666 return ret;
667 }
668 phy_is_fixed = true;
669 phy_dn = port_dn;
670 }
671
672 if (ds->drv->get_phy_flags)
673 phy_flags = ds->drv->get_phy_flags(ds, p->port);
674
675 if (phy_dn) {
676 ret = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
677 /* If this PHY address is part of phys_mii_mask, which means
678 * that we need to divert reads and writes to/from it, then we
679 * want to bind this device using the slave MII bus created by
680 * DSA to make that happen.
681 */
682 if (!phy_is_fixed && ret >= 0 &&
683 (ds->phys_mii_mask & (1 << ret))) {
684 ret = dsa_slave_phy_connect(p, slave_dev, ret);
685 if (ret)
686 return ret;
687 } else {
688 p->phy = of_phy_connect(slave_dev, phy_dn,
689 dsa_slave_adjust_link,
690 phy_flags,
691 p->phy_interface);
692 }
693 }
694
695 if (p->phy && phy_is_fixed)
696 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
697
698 /* We could not connect to a designated PHY, so use the switch internal
699 * MDIO bus instead
700 */
701 if (!p->phy) {
702 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
703 if (ret)
704 return ret;
705 } else {
706 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
707 p->phy->addr, p->phy->drv->name);
708 }
709
710 return 0;
711 }
712
713 int dsa_slave_suspend(struct net_device *slave_dev)
714 {
715 struct dsa_slave_priv *p = netdev_priv(slave_dev);
716
717 netif_device_detach(slave_dev);
718
719 if (p->phy) {
720 phy_stop(p->phy);
721 p->old_pause = -1;
722 p->old_link = -1;
723 p->old_duplex = -1;
724 phy_suspend(p->phy);
725 }
726
727 return 0;
728 }
729
730 int dsa_slave_resume(struct net_device *slave_dev)
731 {
732 struct dsa_slave_priv *p = netdev_priv(slave_dev);
733
734 netif_device_attach(slave_dev);
735
736 if (p->phy) {
737 phy_resume(p->phy);
738 phy_start(p->phy);
739 }
740
741 return 0;
742 }
743
744 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
745 int port, char *name)
746 {
747 struct net_device *master = ds->dst->master_netdev;
748 struct net_device *slave_dev;
749 struct dsa_slave_priv *p;
750 int ret;
751
752 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
753 NET_NAME_UNKNOWN, ether_setup);
754 if (slave_dev == NULL)
755 return -ENOMEM;
756
757 slave_dev->features = master->vlan_features;
758 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
759 eth_hw_addr_inherit(slave_dev, master);
760 slave_dev->tx_queue_len = 0;
761 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
762 slave_dev->swdev_ops = &dsa_slave_swdev_ops;
763
764 SET_NETDEV_DEV(slave_dev, parent);
765 slave_dev->dev.of_node = ds->pd->port_dn[port];
766 slave_dev->vlan_features = master->vlan_features;
767
768 p = netdev_priv(slave_dev);
769 p->dev = slave_dev;
770 p->parent = ds;
771 p->port = port;
772
773 switch (ds->dst->tag_protocol) {
774 #ifdef CONFIG_NET_DSA_TAG_DSA
775 case DSA_TAG_PROTO_DSA:
776 p->xmit = dsa_netdev_ops.xmit;
777 break;
778 #endif
779 #ifdef CONFIG_NET_DSA_TAG_EDSA
780 case DSA_TAG_PROTO_EDSA:
781 p->xmit = edsa_netdev_ops.xmit;
782 break;
783 #endif
784 #ifdef CONFIG_NET_DSA_TAG_TRAILER
785 case DSA_TAG_PROTO_TRAILER:
786 p->xmit = trailer_netdev_ops.xmit;
787 break;
788 #endif
789 #ifdef CONFIG_NET_DSA_TAG_BRCM
790 case DSA_TAG_PROTO_BRCM:
791 p->xmit = brcm_netdev_ops.xmit;
792 break;
793 #endif
794 default:
795 p->xmit = dsa_slave_notag_xmit;
796 break;
797 }
798
799 p->old_pause = -1;
800 p->old_link = -1;
801 p->old_duplex = -1;
802
803 ret = dsa_slave_phy_setup(p, slave_dev);
804 if (ret) {
805 free_netdev(slave_dev);
806 return ret;
807 }
808
809 ds->ports[port] = slave_dev;
810 ret = register_netdev(slave_dev);
811 if (ret) {
812 netdev_err(master, "error %d registering interface %s\n",
813 ret, slave_dev->name);
814 phy_disconnect(p->phy);
815 ds->ports[port] = NULL;
816 free_netdev(slave_dev);
817 return ret;
818 }
819
820 netif_carrier_off(slave_dev);
821
822 return 0;
823 }
824
825 static bool dsa_slave_dev_check(struct net_device *dev)
826 {
827 return dev->netdev_ops == &dsa_slave_netdev_ops;
828 }
829
830 static int dsa_slave_master_changed(struct net_device *dev)
831 {
832 struct net_device *master = netdev_master_upper_dev_get(dev);
833 int err = 0;
834
835 if (master && master->rtnl_link_ops &&
836 !strcmp(master->rtnl_link_ops->kind, "bridge"))
837 err = dsa_slave_bridge_port_join(dev, master);
838 else
839 err = dsa_slave_bridge_port_leave(dev);
840
841 return err;
842 }
843
844 int dsa_slave_netdevice_event(struct notifier_block *unused,
845 unsigned long event, void *ptr)
846 {
847 struct net_device *dev;
848 int err = 0;
849
850 switch (event) {
851 case NETDEV_CHANGEUPPER:
852 dev = netdev_notifier_info_to_dev(ptr);
853 if (!dsa_slave_dev_check(dev))
854 goto out;
855
856 err = dsa_slave_master_changed(dev);
857 if (err)
858 netdev_warn(dev, "failed to reflect master change\n");
859
860 break;
861 }
862
863 out:
864 return NOTIFY_DONE;
865 }
Ubuntu Hirsute Linux kernel mirror