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Merge branch 'dsa-misc-improvements'
[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.%d",
53 ds->dst->tree, ds->index);
54 ds->slave_mii_bus->parent = ds->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 /* ethtool operations *******************************************************/
526 static int
527 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
528 {
529 struct dsa_slave_priv *p = netdev_priv(dev);
530 int err;
531
532 err = -EOPNOTSUPP;
533 if (p->phy != NULL) {
534 err = phy_read_status(p->phy);
535 if (err == 0)
536 err = phy_ethtool_gset(p->phy, cmd);
537 }
538
539 return err;
540 }
541
542 static int
543 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
544 {
545 struct dsa_slave_priv *p = netdev_priv(dev);
546
547 if (p->phy != NULL)
548 return phy_ethtool_sset(p->phy, cmd);
549
550 return -EOPNOTSUPP;
551 }
552
553 static void dsa_slave_get_drvinfo(struct net_device *dev,
554 struct ethtool_drvinfo *drvinfo)
555 {
556 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
557 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
558 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
559 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
560 }
561
562 static int dsa_slave_get_regs_len(struct net_device *dev)
563 {
564 struct dsa_slave_priv *p = netdev_priv(dev);
565 struct dsa_switch *ds = p->parent;
566
567 if (ds->drv->get_regs_len)
568 return ds->drv->get_regs_len(ds, p->port);
569
570 return -EOPNOTSUPP;
571 }
572
573 static void
574 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
575 {
576 struct dsa_slave_priv *p = netdev_priv(dev);
577 struct dsa_switch *ds = p->parent;
578
579 if (ds->drv->get_regs)
580 ds->drv->get_regs(ds, p->port, regs, _p);
581 }
582
583 static int dsa_slave_nway_reset(struct net_device *dev)
584 {
585 struct dsa_slave_priv *p = netdev_priv(dev);
586
587 if (p->phy != NULL)
588 return genphy_restart_aneg(p->phy);
589
590 return -EOPNOTSUPP;
591 }
592
593 static u32 dsa_slave_get_link(struct net_device *dev)
594 {
595 struct dsa_slave_priv *p = netdev_priv(dev);
596
597 if (p->phy != NULL) {
598 genphy_update_link(p->phy);
599 return p->phy->link;
600 }
601
602 return -EOPNOTSUPP;
603 }
604
605 static int dsa_slave_get_eeprom_len(struct net_device *dev)
606 {
607 struct dsa_slave_priv *p = netdev_priv(dev);
608 struct dsa_switch *ds = p->parent;
609
610 if (ds->cd && ds->cd->eeprom_len)
611 return ds->cd->eeprom_len;
612
613 if (ds->drv->get_eeprom_len)
614 return ds->drv->get_eeprom_len(ds);
615
616 return 0;
617 }
618
619 static int dsa_slave_get_eeprom(struct net_device *dev,
620 struct ethtool_eeprom *eeprom, u8 *data)
621 {
622 struct dsa_slave_priv *p = netdev_priv(dev);
623 struct dsa_switch *ds = p->parent;
624
625 if (ds->drv->get_eeprom)
626 return ds->drv->get_eeprom(ds, eeprom, data);
627
628 return -EOPNOTSUPP;
629 }
630
631 static int dsa_slave_set_eeprom(struct net_device *dev,
632 struct ethtool_eeprom *eeprom, u8 *data)
633 {
634 struct dsa_slave_priv *p = netdev_priv(dev);
635 struct dsa_switch *ds = p->parent;
636
637 if (ds->drv->set_eeprom)
638 return ds->drv->set_eeprom(ds, eeprom, data);
639
640 return -EOPNOTSUPP;
641 }
642
643 static void dsa_slave_get_strings(struct net_device *dev,
644 uint32_t stringset, uint8_t *data)
645 {
646 struct dsa_slave_priv *p = netdev_priv(dev);
647 struct dsa_switch *ds = p->parent;
648
649 if (stringset == ETH_SS_STATS) {
650 int len = ETH_GSTRING_LEN;
651
652 strncpy(data, "tx_packets", len);
653 strncpy(data + len, "tx_bytes", len);
654 strncpy(data + 2 * len, "rx_packets", len);
655 strncpy(data + 3 * len, "rx_bytes", len);
656 if (ds->drv->get_strings != NULL)
657 ds->drv->get_strings(ds, p->port, data + 4 * len);
658 }
659 }
660
661 static void dsa_cpu_port_get_ethtool_stats(struct net_device *dev,
662 struct ethtool_stats *stats,
663 uint64_t *data)
664 {
665 struct dsa_switch_tree *dst = dev->dsa_ptr;
666 struct dsa_switch *ds = dst->ds[0];
667 s8 cpu_port = dst->cpu_port;
668 int count = 0;
669
670 if (dst->master_ethtool_ops.get_sset_count) {
671 count = dst->master_ethtool_ops.get_sset_count(dev,
672 ETH_SS_STATS);
673 dst->master_ethtool_ops.get_ethtool_stats(dev, stats, data);
674 }
675
676 if (ds->drv->get_ethtool_stats)
677 ds->drv->get_ethtool_stats(ds, cpu_port, data + count);
678 }
679
680 static int dsa_cpu_port_get_sset_count(struct net_device *dev, int sset)
681 {
682 struct dsa_switch_tree *dst = dev->dsa_ptr;
683 struct dsa_switch *ds = dst->ds[0];
684 int count = 0;
685
686 if (dst->master_ethtool_ops.get_sset_count)
687 count += dst->master_ethtool_ops.get_sset_count(dev, sset);
688
689 if (sset == ETH_SS_STATS && ds->drv->get_sset_count)
690 count += ds->drv->get_sset_count(ds);
691
692 return count;
693 }
694
695 static void dsa_cpu_port_get_strings(struct net_device *dev,
696 uint32_t stringset, uint8_t *data)
697 {
698 struct dsa_switch_tree *dst = dev->dsa_ptr;
699 struct dsa_switch *ds = dst->ds[0];
700 s8 cpu_port = dst->cpu_port;
701 int len = ETH_GSTRING_LEN;
702 int mcount = 0, count;
703 unsigned int i;
704 uint8_t pfx[4];
705 uint8_t *ndata;
706
707 snprintf(pfx, sizeof(pfx), "p%.2d", cpu_port);
708 /* We do not want to be NULL-terminated, since this is a prefix */
709 pfx[sizeof(pfx) - 1] = '_';
710
711 if (dst->master_ethtool_ops.get_sset_count) {
712 mcount = dst->master_ethtool_ops.get_sset_count(dev,
713 ETH_SS_STATS);
714 dst->master_ethtool_ops.get_strings(dev, stringset, data);
715 }
716
717 if (stringset == ETH_SS_STATS && ds->drv->get_strings) {
718 ndata = data + mcount * len;
719 /* This function copies ETH_GSTRINGS_LEN bytes, we will mangle
720 * the output after to prepend our CPU port prefix we
721 * constructed earlier
722 */
723 ds->drv->get_strings(ds, cpu_port, ndata);
724 count = ds->drv->get_sset_count(ds);
725 for (i = 0; i < count; i++) {
726 memmove(ndata + (i * len + sizeof(pfx)),
727 ndata + i * len, len - sizeof(pfx));
728 memcpy(ndata + i * len, pfx, sizeof(pfx));
729 }
730 }
731 }
732
733 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
734 struct ethtool_stats *stats,
735 uint64_t *data)
736 {
737 struct dsa_slave_priv *p = netdev_priv(dev);
738 struct dsa_switch *ds = p->parent;
739
740 data[0] = dev->stats.tx_packets;
741 data[1] = dev->stats.tx_bytes;
742 data[2] = dev->stats.rx_packets;
743 data[3] = dev->stats.rx_bytes;
744 if (ds->drv->get_ethtool_stats != NULL)
745 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
746 }
747
748 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
749 {
750 struct dsa_slave_priv *p = netdev_priv(dev);
751 struct dsa_switch *ds = p->parent;
752
753 if (sset == ETH_SS_STATS) {
754 int count;
755
756 count = 4;
757 if (ds->drv->get_sset_count != NULL)
758 count += ds->drv->get_sset_count(ds);
759
760 return count;
761 }
762
763 return -EOPNOTSUPP;
764 }
765
766 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
767 {
768 struct dsa_slave_priv *p = netdev_priv(dev);
769 struct dsa_switch *ds = p->parent;
770
771 if (ds->drv->get_wol)
772 ds->drv->get_wol(ds, p->port, w);
773 }
774
775 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
776 {
777 struct dsa_slave_priv *p = netdev_priv(dev);
778 struct dsa_switch *ds = p->parent;
779 int ret = -EOPNOTSUPP;
780
781 if (ds->drv->set_wol)
782 ret = ds->drv->set_wol(ds, p->port, w);
783
784 return ret;
785 }
786
787 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
788 {
789 struct dsa_slave_priv *p = netdev_priv(dev);
790 struct dsa_switch *ds = p->parent;
791 int ret;
792
793 if (!ds->drv->set_eee)
794 return -EOPNOTSUPP;
795
796 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
797 if (ret)
798 return ret;
799
800 if (p->phy)
801 ret = phy_ethtool_set_eee(p->phy, e);
802
803 return ret;
804 }
805
806 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
807 {
808 struct dsa_slave_priv *p = netdev_priv(dev);
809 struct dsa_switch *ds = p->parent;
810 int ret;
811
812 if (!ds->drv->get_eee)
813 return -EOPNOTSUPP;
814
815 ret = ds->drv->get_eee(ds, p->port, e);
816 if (ret)
817 return ret;
818
819 if (p->phy)
820 ret = phy_ethtool_get_eee(p->phy, e);
821
822 return ret;
823 }
824
825 #ifdef CONFIG_NET_POLL_CONTROLLER
826 static int dsa_slave_netpoll_setup(struct net_device *dev,
827 struct netpoll_info *ni)
828 {
829 struct dsa_slave_priv *p = netdev_priv(dev);
830 struct dsa_switch *ds = p->parent;
831 struct net_device *master = ds->dst->master_netdev;
832 struct netpoll *netpoll;
833 int err = 0;
834
835 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
836 if (!netpoll)
837 return -ENOMEM;
838
839 err = __netpoll_setup(netpoll, master);
840 if (err) {
841 kfree(netpoll);
842 goto out;
843 }
844
845 p->netpoll = netpoll;
846 out:
847 return err;
848 }
849
850 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
851 {
852 struct dsa_slave_priv *p = netdev_priv(dev);
853 struct netpoll *netpoll = p->netpoll;
854
855 if (!netpoll)
856 return;
857
858 p->netpoll = NULL;
859
860 __netpoll_free_async(netpoll);
861 }
862
863 static void dsa_slave_poll_controller(struct net_device *dev)
864 {
865 }
866 #endif
867
868 void dsa_cpu_port_ethtool_init(struct ethtool_ops *ops)
869 {
870 ops->get_sset_count = dsa_cpu_port_get_sset_count;
871 ops->get_ethtool_stats = dsa_cpu_port_get_ethtool_stats;
872 ops->get_strings = dsa_cpu_port_get_strings;
873 }
874
875 static const struct ethtool_ops dsa_slave_ethtool_ops = {
876 .get_settings = dsa_slave_get_settings,
877 .set_settings = dsa_slave_set_settings,
878 .get_drvinfo = dsa_slave_get_drvinfo,
879 .get_regs_len = dsa_slave_get_regs_len,
880 .get_regs = dsa_slave_get_regs,
881 .nway_reset = dsa_slave_nway_reset,
882 .get_link = dsa_slave_get_link,
883 .get_eeprom_len = dsa_slave_get_eeprom_len,
884 .get_eeprom = dsa_slave_get_eeprom,
885 .set_eeprom = dsa_slave_set_eeprom,
886 .get_strings = dsa_slave_get_strings,
887 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
888 .get_sset_count = dsa_slave_get_sset_count,
889 .set_wol = dsa_slave_set_wol,
890 .get_wol = dsa_slave_get_wol,
891 .set_eee = dsa_slave_set_eee,
892 .get_eee = dsa_slave_get_eee,
893 };
894
895 static const struct net_device_ops dsa_slave_netdev_ops = {
896 .ndo_open = dsa_slave_open,
897 .ndo_stop = dsa_slave_close,
898 .ndo_start_xmit = dsa_slave_xmit,
899 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
900 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
901 .ndo_set_mac_address = dsa_slave_set_mac_address,
902 .ndo_fdb_add = switchdev_port_fdb_add,
903 .ndo_fdb_del = switchdev_port_fdb_del,
904 .ndo_fdb_dump = switchdev_port_fdb_dump,
905 .ndo_do_ioctl = dsa_slave_ioctl,
906 .ndo_get_iflink = dsa_slave_get_iflink,
907 #ifdef CONFIG_NET_POLL_CONTROLLER
908 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
909 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
910 .ndo_poll_controller = dsa_slave_poll_controller,
911 #endif
912 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
913 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
914 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
915 };
916
917 static const struct switchdev_ops dsa_slave_switchdev_ops = {
918 .switchdev_port_attr_get = dsa_slave_port_attr_get,
919 .switchdev_port_attr_set = dsa_slave_port_attr_set,
920 .switchdev_port_obj_add = dsa_slave_port_obj_add,
921 .switchdev_port_obj_del = dsa_slave_port_obj_del,
922 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
923 };
924
925 static struct device_type dsa_type = {
926 .name = "dsa",
927 };
928
929 static void dsa_slave_adjust_link(struct net_device *dev)
930 {
931 struct dsa_slave_priv *p = netdev_priv(dev);
932 struct dsa_switch *ds = p->parent;
933 unsigned int status_changed = 0;
934
935 if (p->old_link != p->phy->link) {
936 status_changed = 1;
937 p->old_link = p->phy->link;
938 }
939
940 if (p->old_duplex != p->phy->duplex) {
941 status_changed = 1;
942 p->old_duplex = p->phy->duplex;
943 }
944
945 if (p->old_pause != p->phy->pause) {
946 status_changed = 1;
947 p->old_pause = p->phy->pause;
948 }
949
950 if (ds->drv->adjust_link && status_changed)
951 ds->drv->adjust_link(ds, p->port, p->phy);
952
953 if (status_changed)
954 phy_print_status(p->phy);
955 }
956
957 static int dsa_slave_fixed_link_update(struct net_device *dev,
958 struct fixed_phy_status *status)
959 {
960 struct dsa_slave_priv *p;
961 struct dsa_switch *ds;
962
963 if (dev) {
964 p = netdev_priv(dev);
965 ds = p->parent;
966 if (ds->drv->fixed_link_update)
967 ds->drv->fixed_link_update(ds, p->port, status);
968 }
969
970 return 0;
971 }
972
973 /* slave device setup *******************************************************/
974 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
975 struct net_device *slave_dev,
976 int addr)
977 {
978 struct dsa_switch *ds = p->parent;
979
980 p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr);
981 if (!p->phy) {
982 netdev_err(slave_dev, "no phy at %d\n", addr);
983 return -ENODEV;
984 }
985
986 /* Use already configured phy mode */
987 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
988 p->phy_interface = p->phy->interface;
989 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
990 p->phy_interface);
991
992 return 0;
993 }
994
995 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
996 struct net_device *slave_dev)
997 {
998 struct dsa_switch *ds = p->parent;
999 struct device_node *phy_dn, *port_dn;
1000 bool phy_is_fixed = false;
1001 u32 phy_flags = 0;
1002 int mode, ret;
1003
1004 port_dn = ds->ports[p->port].dn;
1005 mode = of_get_phy_mode(port_dn);
1006 if (mode < 0)
1007 mode = PHY_INTERFACE_MODE_NA;
1008 p->phy_interface = mode;
1009
1010 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1011 if (of_phy_is_fixed_link(port_dn)) {
1012 /* In the case of a fixed PHY, the DT node associated
1013 * to the fixed PHY is the Port DT node
1014 */
1015 ret = of_phy_register_fixed_link(port_dn);
1016 if (ret) {
1017 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
1018 return ret;
1019 }
1020 phy_is_fixed = true;
1021 phy_dn = port_dn;
1022 }
1023
1024 if (ds->drv->get_phy_flags)
1025 phy_flags = ds->drv->get_phy_flags(ds, p->port);
1026
1027 if (phy_dn) {
1028 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
1029
1030 /* If this PHY address is part of phys_mii_mask, which means
1031 * that we need to divert reads and writes to/from it, then we
1032 * want to bind this device using the slave MII bus created by
1033 * DSA to make that happen.
1034 */
1035 if (!phy_is_fixed && phy_id >= 0 &&
1036 (ds->phys_mii_mask & (1 << phy_id))) {
1037 ret = dsa_slave_phy_connect(p, slave_dev, phy_id);
1038 if (ret) {
1039 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret);
1040 return ret;
1041 }
1042 } else {
1043 p->phy = of_phy_connect(slave_dev, phy_dn,
1044 dsa_slave_adjust_link,
1045 phy_flags,
1046 p->phy_interface);
1047 }
1048 }
1049
1050 if (p->phy && phy_is_fixed)
1051 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
1052
1053 /* We could not connect to a designated PHY, so use the switch internal
1054 * MDIO bus instead
1055 */
1056 if (!p->phy) {
1057 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
1058 if (ret) {
1059 netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret);
1060 return ret;
1061 }
1062 }
1063
1064 phy_attached_info(p->phy);
1065
1066 return 0;
1067 }
1068
1069 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1070 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1071 struct netdev_queue *txq,
1072 void *_unused)
1073 {
1074 lockdep_set_class(&txq->_xmit_lock,
1075 &dsa_slave_netdev_xmit_lock_key);
1076 }
1077
1078 int dsa_slave_suspend(struct net_device *slave_dev)
1079 {
1080 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1081
1082 if (p->phy) {
1083 phy_stop(p->phy);
1084 p->old_pause = -1;
1085 p->old_link = -1;
1086 p->old_duplex = -1;
1087 phy_suspend(p->phy);
1088 }
1089
1090 return 0;
1091 }
1092
1093 int dsa_slave_resume(struct net_device *slave_dev)
1094 {
1095 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1096
1097 netif_device_attach(slave_dev);
1098
1099 if (p->phy) {
1100 phy_resume(p->phy);
1101 phy_start(p->phy);
1102 }
1103
1104 return 0;
1105 }
1106
1107 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1108 int port, const char *name)
1109 {
1110 struct dsa_switch_tree *dst = ds->dst;
1111 struct net_device *master;
1112 struct net_device *slave_dev;
1113 struct dsa_slave_priv *p;
1114 int ret;
1115
1116 master = ds->dst->master_netdev;
1117 if (ds->master_netdev)
1118 master = ds->master_netdev;
1119
1120 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1121 NET_NAME_UNKNOWN, ether_setup);
1122 if (slave_dev == NULL)
1123 return -ENOMEM;
1124
1125 slave_dev->features = master->vlan_features;
1126 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1127 eth_hw_addr_inherit(slave_dev, master);
1128 slave_dev->priv_flags |= IFF_NO_QUEUE;
1129 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1130 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1131 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1132
1133 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1134 NULL);
1135
1136 SET_NETDEV_DEV(slave_dev, parent);
1137 slave_dev->dev.of_node = ds->ports[port].dn;
1138 slave_dev->vlan_features = master->vlan_features;
1139
1140 p = netdev_priv(slave_dev);
1141 p->parent = ds;
1142 p->port = port;
1143 p->xmit = dst->tag_ops->xmit;
1144
1145 p->old_pause = -1;
1146 p->old_link = -1;
1147 p->old_duplex = -1;
1148
1149 ds->ports[port].netdev = slave_dev;
1150 ret = register_netdev(slave_dev);
1151 if (ret) {
1152 netdev_err(master, "error %d registering interface %s\n",
1153 ret, slave_dev->name);
1154 ds->ports[port].netdev = NULL;
1155 free_netdev(slave_dev);
1156 return ret;
1157 }
1158
1159 netif_carrier_off(slave_dev);
1160
1161 ret = dsa_slave_phy_setup(p, slave_dev);
1162 if (ret) {
1163 netdev_err(master, "error %d setting up slave phy\n", ret);
1164 unregister_netdev(slave_dev);
1165 free_netdev(slave_dev);
1166 return ret;
1167 }
1168
1169 return 0;
1170 }
1171
1172 void dsa_slave_destroy(struct net_device *slave_dev)
1173 {
1174 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1175
1176 netif_carrier_off(slave_dev);
1177 if (p->phy)
1178 phy_disconnect(p->phy);
1179 unregister_netdev(slave_dev);
1180 free_netdev(slave_dev);
1181 }
1182
1183 static bool dsa_slave_dev_check(struct net_device *dev)
1184 {
1185 return dev->netdev_ops == &dsa_slave_netdev_ops;
1186 }
1187
1188 static int dsa_slave_port_upper_event(struct net_device *dev,
1189 unsigned long event, void *ptr)
1190 {
1191 struct netdev_notifier_changeupper_info *info = ptr;
1192 struct net_device *upper = info->upper_dev;
1193 int err = 0;
1194
1195 switch (event) {
1196 case NETDEV_CHANGEUPPER:
1197 if (netif_is_bridge_master(upper)) {
1198 if (info->linking)
1199 err = dsa_slave_bridge_port_join(dev, upper);
1200 else
1201 dsa_slave_bridge_port_leave(dev);
1202 }
1203
1204 break;
1205 }
1206
1207 return notifier_from_errno(err);
1208 }
1209
1210 static int dsa_slave_port_event(struct net_device *dev, unsigned long event,
1211 void *ptr)
1212 {
1213 switch (event) {
1214 case NETDEV_CHANGEUPPER:
1215 return dsa_slave_port_upper_event(dev, event, ptr);
1216 }
1217
1218 return NOTIFY_DONE;
1219 }
1220
1221 int dsa_slave_netdevice_event(struct notifier_block *unused,
1222 unsigned long event, void *ptr)
1223 {
1224 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1225
1226 if (dsa_slave_dev_check(dev))
1227 return dsa_slave_port_event(dev, event, ptr);
1228
1229 return NOTIFY_DONE;
1230 }
Linux kernel - Deliverables
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