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Merge remote-tracking branch 'regmap/topic/debugfs' into regmap-next
[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_fastest_ageing_time(struct dsa_switch *ds,
337 unsigned int ageing_time)
338 {
339 int i;
340
341 for (i = 0; i < DSA_MAX_PORTS; ++i) {
342 struct dsa_port *dp = &ds->ports[i];
343
344 if (dp && dp->ageing_time && dp->ageing_time < ageing_time)
345 ageing_time = dp->ageing_time;
346 }
347
348 return ageing_time;
349 }
350
351 static int dsa_slave_ageing_time(struct net_device *dev,
352 const struct switchdev_attr *attr,
353 struct switchdev_trans *trans)
354 {
355 struct dsa_slave_priv *p = netdev_priv(dev);
356 struct dsa_switch *ds = p->parent;
357 unsigned long ageing_jiffies = clock_t_to_jiffies(attr->u.ageing_time);
358 unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
359
360 /* bridge skips -EOPNOTSUPP, so skip the prepare phase */
361 if (switchdev_trans_ph_prepare(trans))
362 return 0;
363
364 /* Keep the fastest ageing time in case of multiple bridges */
365 ds->ports[p->port].ageing_time = ageing_time;
366 ageing_time = dsa_fastest_ageing_time(ds, ageing_time);
367
368 if (ds->drv->set_ageing_time)
369 return ds->drv->set_ageing_time(ds, ageing_time);
370
371 return 0;
372 }
373
374 static int dsa_slave_port_attr_set(struct net_device *dev,
375 const struct switchdev_attr *attr,
376 struct switchdev_trans *trans)
377 {
378 int ret;
379
380 switch (attr->id) {
381 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
382 ret = dsa_slave_stp_state_set(dev, attr, trans);
383 break;
384 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
385 ret = dsa_slave_vlan_filtering(dev, attr, trans);
386 break;
387 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
388 ret = dsa_slave_ageing_time(dev, attr, trans);
389 break;
390 default:
391 ret = -EOPNOTSUPP;
392 break;
393 }
394
395 return ret;
396 }
397
398 static int dsa_slave_port_obj_add(struct net_device *dev,
399 const struct switchdev_obj *obj,
400 struct switchdev_trans *trans)
401 {
402 int err;
403
404 /* For the prepare phase, ensure the full set of changes is feasable in
405 * one go in order to signal a failure properly. If an operation is not
406 * supported, return -EOPNOTSUPP.
407 */
408
409 switch (obj->id) {
410 case SWITCHDEV_OBJ_ID_PORT_FDB:
411 err = dsa_slave_port_fdb_add(dev,
412 SWITCHDEV_OBJ_PORT_FDB(obj),
413 trans);
414 break;
415 case SWITCHDEV_OBJ_ID_PORT_VLAN:
416 err = dsa_slave_port_vlan_add(dev,
417 SWITCHDEV_OBJ_PORT_VLAN(obj),
418 trans);
419 break;
420 default:
421 err = -EOPNOTSUPP;
422 break;
423 }
424
425 return err;
426 }
427
428 static int dsa_slave_port_obj_del(struct net_device *dev,
429 const struct switchdev_obj *obj)
430 {
431 int err;
432
433 switch (obj->id) {
434 case SWITCHDEV_OBJ_ID_PORT_FDB:
435 err = dsa_slave_port_fdb_del(dev,
436 SWITCHDEV_OBJ_PORT_FDB(obj));
437 break;
438 case SWITCHDEV_OBJ_ID_PORT_VLAN:
439 err = dsa_slave_port_vlan_del(dev,
440 SWITCHDEV_OBJ_PORT_VLAN(obj));
441 break;
442 default:
443 err = -EOPNOTSUPP;
444 break;
445 }
446
447 return err;
448 }
449
450 static int dsa_slave_port_obj_dump(struct net_device *dev,
451 struct switchdev_obj *obj,
452 switchdev_obj_dump_cb_t *cb)
453 {
454 int err;
455
456 switch (obj->id) {
457 case SWITCHDEV_OBJ_ID_PORT_FDB:
458 err = dsa_slave_port_fdb_dump(dev,
459 SWITCHDEV_OBJ_PORT_FDB(obj),
460 cb);
461 break;
462 case SWITCHDEV_OBJ_ID_PORT_VLAN:
463 err = dsa_slave_port_vlan_dump(dev,
464 SWITCHDEV_OBJ_PORT_VLAN(obj),
465 cb);
466 break;
467 default:
468 err = -EOPNOTSUPP;
469 break;
470 }
471
472 return err;
473 }
474
475 static int dsa_slave_bridge_port_join(struct net_device *dev,
476 struct net_device *br)
477 {
478 struct dsa_slave_priv *p = netdev_priv(dev);
479 struct dsa_switch *ds = p->parent;
480 int ret = -EOPNOTSUPP;
481
482 p->bridge_dev = br;
483
484 if (ds->drv->port_bridge_join)
485 ret = ds->drv->port_bridge_join(ds, p->port, br);
486
487 return ret == -EOPNOTSUPP ? 0 : ret;
488 }
489
490 static void dsa_slave_bridge_port_leave(struct net_device *dev)
491 {
492 struct dsa_slave_priv *p = netdev_priv(dev);
493 struct dsa_switch *ds = p->parent;
494
495
496 if (ds->drv->port_bridge_leave)
497 ds->drv->port_bridge_leave(ds, p->port);
498
499 p->bridge_dev = NULL;
500
501 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
502 * so allow it to be in BR_STATE_FORWARDING to be kept functional
503 */
504 if (ds->drv->port_stp_state_set)
505 ds->drv->port_stp_state_set(ds, p->port, BR_STATE_FORWARDING);
506 }
507
508 static int dsa_slave_port_attr_get(struct net_device *dev,
509 struct switchdev_attr *attr)
510 {
511 struct dsa_slave_priv *p = netdev_priv(dev);
512 struct dsa_switch *ds = p->parent;
513
514 switch (attr->id) {
515 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
516 attr->u.ppid.id_len = sizeof(ds->index);
517 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
518 break;
519 default:
520 return -EOPNOTSUPP;
521 }
522
523 return 0;
524 }
525
526 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
527 struct sk_buff *skb)
528 {
529 #ifdef CONFIG_NET_POLL_CONTROLLER
530 if (p->netpoll)
531 netpoll_send_skb(p->netpoll, skb);
532 #else
533 BUG();
534 #endif
535 return NETDEV_TX_OK;
536 }
537
538 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
539 {
540 struct dsa_slave_priv *p = netdev_priv(dev);
541 struct sk_buff *nskb;
542
543 dev->stats.tx_packets++;
544 dev->stats.tx_bytes += skb->len;
545
546 /* Transmit function may have to reallocate the original SKB */
547 nskb = p->xmit(skb, dev);
548 if (!nskb)
549 return NETDEV_TX_OK;
550
551 /* SKB for netpoll still need to be mangled with the protocol-specific
552 * tag to be successfully transmitted
553 */
554 if (unlikely(netpoll_tx_running(dev)))
555 return dsa_netpoll_send_skb(p, nskb);
556
557 /* Queue the SKB for transmission on the parent interface, but
558 * do not modify its EtherType
559 */
560 nskb->dev = p->parent->dst->master_netdev;
561 dev_queue_xmit(nskb);
562
563 return NETDEV_TX_OK;
564 }
565
566 /* ethtool operations *******************************************************/
567 static int
568 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
569 {
570 struct dsa_slave_priv *p = netdev_priv(dev);
571 int err;
572
573 err = -EOPNOTSUPP;
574 if (p->phy != NULL) {
575 err = phy_read_status(p->phy);
576 if (err == 0)
577 err = phy_ethtool_gset(p->phy, cmd);
578 }
579
580 return err;
581 }
582
583 static int
584 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
585 {
586 struct dsa_slave_priv *p = netdev_priv(dev);
587
588 if (p->phy != NULL)
589 return phy_ethtool_sset(p->phy, cmd);
590
591 return -EOPNOTSUPP;
592 }
593
594 static void dsa_slave_get_drvinfo(struct net_device *dev,
595 struct ethtool_drvinfo *drvinfo)
596 {
597 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
598 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
599 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
600 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
601 }
602
603 static int dsa_slave_get_regs_len(struct net_device *dev)
604 {
605 struct dsa_slave_priv *p = netdev_priv(dev);
606 struct dsa_switch *ds = p->parent;
607
608 if (ds->drv->get_regs_len)
609 return ds->drv->get_regs_len(ds, p->port);
610
611 return -EOPNOTSUPP;
612 }
613
614 static void
615 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
616 {
617 struct dsa_slave_priv *p = netdev_priv(dev);
618 struct dsa_switch *ds = p->parent;
619
620 if (ds->drv->get_regs)
621 ds->drv->get_regs(ds, p->port, regs, _p);
622 }
623
624 static int dsa_slave_nway_reset(struct net_device *dev)
625 {
626 struct dsa_slave_priv *p = netdev_priv(dev);
627
628 if (p->phy != NULL)
629 return genphy_restart_aneg(p->phy);
630
631 return -EOPNOTSUPP;
632 }
633
634 static u32 dsa_slave_get_link(struct net_device *dev)
635 {
636 struct dsa_slave_priv *p = netdev_priv(dev);
637
638 if (p->phy != NULL) {
639 genphy_update_link(p->phy);
640 return p->phy->link;
641 }
642
643 return -EOPNOTSUPP;
644 }
645
646 static int dsa_slave_get_eeprom_len(struct net_device *dev)
647 {
648 struct dsa_slave_priv *p = netdev_priv(dev);
649 struct dsa_switch *ds = p->parent;
650
651 if (ds->cd && ds->cd->eeprom_len)
652 return ds->cd->eeprom_len;
653
654 if (ds->drv->get_eeprom_len)
655 return ds->drv->get_eeprom_len(ds);
656
657 return 0;
658 }
659
660 static int dsa_slave_get_eeprom(struct net_device *dev,
661 struct ethtool_eeprom *eeprom, u8 *data)
662 {
663 struct dsa_slave_priv *p = netdev_priv(dev);
664 struct dsa_switch *ds = p->parent;
665
666 if (ds->drv->get_eeprom)
667 return ds->drv->get_eeprom(ds, eeprom, data);
668
669 return -EOPNOTSUPP;
670 }
671
672 static int dsa_slave_set_eeprom(struct net_device *dev,
673 struct ethtool_eeprom *eeprom, u8 *data)
674 {
675 struct dsa_slave_priv *p = netdev_priv(dev);
676 struct dsa_switch *ds = p->parent;
677
678 if (ds->drv->set_eeprom)
679 return ds->drv->set_eeprom(ds, eeprom, data);
680
681 return -EOPNOTSUPP;
682 }
683
684 static void dsa_slave_get_strings(struct net_device *dev,
685 uint32_t stringset, uint8_t *data)
686 {
687 struct dsa_slave_priv *p = netdev_priv(dev);
688 struct dsa_switch *ds = p->parent;
689
690 if (stringset == ETH_SS_STATS) {
691 int len = ETH_GSTRING_LEN;
692
693 strncpy(data, "tx_packets", len);
694 strncpy(data + len, "tx_bytes", len);
695 strncpy(data + 2 * len, "rx_packets", len);
696 strncpy(data + 3 * len, "rx_bytes", len);
697 if (ds->drv->get_strings != NULL)
698 ds->drv->get_strings(ds, p->port, data + 4 * len);
699 }
700 }
701
702 static void dsa_cpu_port_get_ethtool_stats(struct net_device *dev,
703 struct ethtool_stats *stats,
704 uint64_t *data)
705 {
706 struct dsa_switch_tree *dst = dev->dsa_ptr;
707 struct dsa_switch *ds = dst->ds[0];
708 s8 cpu_port = dst->cpu_port;
709 int count = 0;
710
711 if (dst->master_ethtool_ops.get_sset_count) {
712 count = dst->master_ethtool_ops.get_sset_count(dev,
713 ETH_SS_STATS);
714 dst->master_ethtool_ops.get_ethtool_stats(dev, stats, data);
715 }
716
717 if (ds->drv->get_ethtool_stats)
718 ds->drv->get_ethtool_stats(ds, cpu_port, data + count);
719 }
720
721 static int dsa_cpu_port_get_sset_count(struct net_device *dev, int sset)
722 {
723 struct dsa_switch_tree *dst = dev->dsa_ptr;
724 struct dsa_switch *ds = dst->ds[0];
725 int count = 0;
726
727 if (dst->master_ethtool_ops.get_sset_count)
728 count += dst->master_ethtool_ops.get_sset_count(dev, sset);
729
730 if (sset == ETH_SS_STATS && ds->drv->get_sset_count)
731 count += ds->drv->get_sset_count(ds);
732
733 return count;
734 }
735
736 static void dsa_cpu_port_get_strings(struct net_device *dev,
737 uint32_t stringset, uint8_t *data)
738 {
739 struct dsa_switch_tree *dst = dev->dsa_ptr;
740 struct dsa_switch *ds = dst->ds[0];
741 s8 cpu_port = dst->cpu_port;
742 int len = ETH_GSTRING_LEN;
743 int mcount = 0, count;
744 unsigned int i;
745 uint8_t pfx[4];
746 uint8_t *ndata;
747
748 snprintf(pfx, sizeof(pfx), "p%.2d", cpu_port);
749 /* We do not want to be NULL-terminated, since this is a prefix */
750 pfx[sizeof(pfx) - 1] = '_';
751
752 if (dst->master_ethtool_ops.get_sset_count) {
753 mcount = dst->master_ethtool_ops.get_sset_count(dev,
754 ETH_SS_STATS);
755 dst->master_ethtool_ops.get_strings(dev, stringset, data);
756 }
757
758 if (stringset == ETH_SS_STATS && ds->drv->get_strings) {
759 ndata = data + mcount * len;
760 /* This function copies ETH_GSTRINGS_LEN bytes, we will mangle
761 * the output after to prepend our CPU port prefix we
762 * constructed earlier
763 */
764 ds->drv->get_strings(ds, cpu_port, ndata);
765 count = ds->drv->get_sset_count(ds);
766 for (i = 0; i < count; i++) {
767 memmove(ndata + (i * len + sizeof(pfx)),
768 ndata + i * len, len - sizeof(pfx));
769 memcpy(ndata + i * len, pfx, sizeof(pfx));
770 }
771 }
772 }
773
774 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
775 struct ethtool_stats *stats,
776 uint64_t *data)
777 {
778 struct dsa_slave_priv *p = netdev_priv(dev);
779 struct dsa_switch *ds = p->parent;
780
781 data[0] = dev->stats.tx_packets;
782 data[1] = dev->stats.tx_bytes;
783 data[2] = dev->stats.rx_packets;
784 data[3] = dev->stats.rx_bytes;
785 if (ds->drv->get_ethtool_stats != NULL)
786 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
787 }
788
789 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
790 {
791 struct dsa_slave_priv *p = netdev_priv(dev);
792 struct dsa_switch *ds = p->parent;
793
794 if (sset == ETH_SS_STATS) {
795 int count;
796
797 count = 4;
798 if (ds->drv->get_sset_count != NULL)
799 count += ds->drv->get_sset_count(ds);
800
801 return count;
802 }
803
804 return -EOPNOTSUPP;
805 }
806
807 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
808 {
809 struct dsa_slave_priv *p = netdev_priv(dev);
810 struct dsa_switch *ds = p->parent;
811
812 if (ds->drv->get_wol)
813 ds->drv->get_wol(ds, p->port, w);
814 }
815
816 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
817 {
818 struct dsa_slave_priv *p = netdev_priv(dev);
819 struct dsa_switch *ds = p->parent;
820 int ret = -EOPNOTSUPP;
821
822 if (ds->drv->set_wol)
823 ret = ds->drv->set_wol(ds, p->port, w);
824
825 return ret;
826 }
827
828 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
829 {
830 struct dsa_slave_priv *p = netdev_priv(dev);
831 struct dsa_switch *ds = p->parent;
832 int ret;
833
834 if (!ds->drv->set_eee)
835 return -EOPNOTSUPP;
836
837 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
838 if (ret)
839 return ret;
840
841 if (p->phy)
842 ret = phy_ethtool_set_eee(p->phy, e);
843
844 return ret;
845 }
846
847 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
848 {
849 struct dsa_slave_priv *p = netdev_priv(dev);
850 struct dsa_switch *ds = p->parent;
851 int ret;
852
853 if (!ds->drv->get_eee)
854 return -EOPNOTSUPP;
855
856 ret = ds->drv->get_eee(ds, p->port, e);
857 if (ret)
858 return ret;
859
860 if (p->phy)
861 ret = phy_ethtool_get_eee(p->phy, e);
862
863 return ret;
864 }
865
866 #ifdef CONFIG_NET_POLL_CONTROLLER
867 static int dsa_slave_netpoll_setup(struct net_device *dev,
868 struct netpoll_info *ni)
869 {
870 struct dsa_slave_priv *p = netdev_priv(dev);
871 struct dsa_switch *ds = p->parent;
872 struct net_device *master = ds->dst->master_netdev;
873 struct netpoll *netpoll;
874 int err = 0;
875
876 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
877 if (!netpoll)
878 return -ENOMEM;
879
880 err = __netpoll_setup(netpoll, master);
881 if (err) {
882 kfree(netpoll);
883 goto out;
884 }
885
886 p->netpoll = netpoll;
887 out:
888 return err;
889 }
890
891 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
892 {
893 struct dsa_slave_priv *p = netdev_priv(dev);
894 struct netpoll *netpoll = p->netpoll;
895
896 if (!netpoll)
897 return;
898
899 p->netpoll = NULL;
900
901 __netpoll_free_async(netpoll);
902 }
903
904 static void dsa_slave_poll_controller(struct net_device *dev)
905 {
906 }
907 #endif
908
909 void dsa_cpu_port_ethtool_init(struct ethtool_ops *ops)
910 {
911 ops->get_sset_count = dsa_cpu_port_get_sset_count;
912 ops->get_ethtool_stats = dsa_cpu_port_get_ethtool_stats;
913 ops->get_strings = dsa_cpu_port_get_strings;
914 }
915
916 static const struct ethtool_ops dsa_slave_ethtool_ops = {
917 .get_settings = dsa_slave_get_settings,
918 .set_settings = dsa_slave_set_settings,
919 .get_drvinfo = dsa_slave_get_drvinfo,
920 .get_regs_len = dsa_slave_get_regs_len,
921 .get_regs = dsa_slave_get_regs,
922 .nway_reset = dsa_slave_nway_reset,
923 .get_link = dsa_slave_get_link,
924 .get_eeprom_len = dsa_slave_get_eeprom_len,
925 .get_eeprom = dsa_slave_get_eeprom,
926 .set_eeprom = dsa_slave_set_eeprom,
927 .get_strings = dsa_slave_get_strings,
928 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
929 .get_sset_count = dsa_slave_get_sset_count,
930 .set_wol = dsa_slave_set_wol,
931 .get_wol = dsa_slave_get_wol,
932 .set_eee = dsa_slave_set_eee,
933 .get_eee = dsa_slave_get_eee,
934 };
935
936 static const struct net_device_ops dsa_slave_netdev_ops = {
937 .ndo_open = dsa_slave_open,
938 .ndo_stop = dsa_slave_close,
939 .ndo_start_xmit = dsa_slave_xmit,
940 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
941 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
942 .ndo_set_mac_address = dsa_slave_set_mac_address,
943 .ndo_fdb_add = switchdev_port_fdb_add,
944 .ndo_fdb_del = switchdev_port_fdb_del,
945 .ndo_fdb_dump = switchdev_port_fdb_dump,
946 .ndo_do_ioctl = dsa_slave_ioctl,
947 .ndo_get_iflink = dsa_slave_get_iflink,
948 #ifdef CONFIG_NET_POLL_CONTROLLER
949 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
950 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
951 .ndo_poll_controller = dsa_slave_poll_controller,
952 #endif
953 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
954 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
955 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
956 };
957
958 static const struct switchdev_ops dsa_slave_switchdev_ops = {
959 .switchdev_port_attr_get = dsa_slave_port_attr_get,
960 .switchdev_port_attr_set = dsa_slave_port_attr_set,
961 .switchdev_port_obj_add = dsa_slave_port_obj_add,
962 .switchdev_port_obj_del = dsa_slave_port_obj_del,
963 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
964 };
965
966 static struct device_type dsa_type = {
967 .name = "dsa",
968 };
969
970 static void dsa_slave_adjust_link(struct net_device *dev)
971 {
972 struct dsa_slave_priv *p = netdev_priv(dev);
973 struct dsa_switch *ds = p->parent;
974 unsigned int status_changed = 0;
975
976 if (p->old_link != p->phy->link) {
977 status_changed = 1;
978 p->old_link = p->phy->link;
979 }
980
981 if (p->old_duplex != p->phy->duplex) {
982 status_changed = 1;
983 p->old_duplex = p->phy->duplex;
984 }
985
986 if (p->old_pause != p->phy->pause) {
987 status_changed = 1;
988 p->old_pause = p->phy->pause;
989 }
990
991 if (ds->drv->adjust_link && status_changed)
992 ds->drv->adjust_link(ds, p->port, p->phy);
993
994 if (status_changed)
995 phy_print_status(p->phy);
996 }
997
998 static int dsa_slave_fixed_link_update(struct net_device *dev,
999 struct fixed_phy_status *status)
1000 {
1001 struct dsa_slave_priv *p;
1002 struct dsa_switch *ds;
1003
1004 if (dev) {
1005 p = netdev_priv(dev);
1006 ds = p->parent;
1007 if (ds->drv->fixed_link_update)
1008 ds->drv->fixed_link_update(ds, p->port, status);
1009 }
1010
1011 return 0;
1012 }
1013
1014 /* slave device setup *******************************************************/
1015 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
1016 struct net_device *slave_dev,
1017 int addr)
1018 {
1019 struct dsa_switch *ds = p->parent;
1020
1021 p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr);
1022 if (!p->phy) {
1023 netdev_err(slave_dev, "no phy at %d\n", addr);
1024 return -ENODEV;
1025 }
1026
1027 /* Use already configured phy mode */
1028 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1029 p->phy_interface = p->phy->interface;
1030 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
1031 p->phy_interface);
1032
1033 return 0;
1034 }
1035
1036 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
1037 struct net_device *slave_dev)
1038 {
1039 struct dsa_switch *ds = p->parent;
1040 struct device_node *phy_dn, *port_dn;
1041 bool phy_is_fixed = false;
1042 u32 phy_flags = 0;
1043 int mode, ret;
1044
1045 port_dn = ds->ports[p->port].dn;
1046 mode = of_get_phy_mode(port_dn);
1047 if (mode < 0)
1048 mode = PHY_INTERFACE_MODE_NA;
1049 p->phy_interface = mode;
1050
1051 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1052 if (of_phy_is_fixed_link(port_dn)) {
1053 /* In the case of a fixed PHY, the DT node associated
1054 * to the fixed PHY is the Port DT node
1055 */
1056 ret = of_phy_register_fixed_link(port_dn);
1057 if (ret) {
1058 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
1059 return ret;
1060 }
1061 phy_is_fixed = true;
1062 phy_dn = port_dn;
1063 }
1064
1065 if (ds->drv->get_phy_flags)
1066 phy_flags = ds->drv->get_phy_flags(ds, p->port);
1067
1068 if (phy_dn) {
1069 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
1070
1071 /* If this PHY address is part of phys_mii_mask, which means
1072 * that we need to divert reads and writes to/from it, then we
1073 * want to bind this device using the slave MII bus created by
1074 * DSA to make that happen.
1075 */
1076 if (!phy_is_fixed && phy_id >= 0 &&
1077 (ds->phys_mii_mask & (1 << phy_id))) {
1078 ret = dsa_slave_phy_connect(p, slave_dev, phy_id);
1079 if (ret) {
1080 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret);
1081 return ret;
1082 }
1083 } else {
1084 p->phy = of_phy_connect(slave_dev, phy_dn,
1085 dsa_slave_adjust_link,
1086 phy_flags,
1087 p->phy_interface);
1088 }
1089 }
1090
1091 if (p->phy && phy_is_fixed)
1092 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
1093
1094 /* We could not connect to a designated PHY, so use the switch internal
1095 * MDIO bus instead
1096 */
1097 if (!p->phy) {
1098 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
1099 if (ret) {
1100 netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret);
1101 return ret;
1102 }
1103 }
1104
1105 phy_attached_info(p->phy);
1106
1107 return 0;
1108 }
1109
1110 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1111 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1112 struct netdev_queue *txq,
1113 void *_unused)
1114 {
1115 lockdep_set_class(&txq->_xmit_lock,
1116 &dsa_slave_netdev_xmit_lock_key);
1117 }
1118
1119 int dsa_slave_suspend(struct net_device *slave_dev)
1120 {
1121 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1122
1123 if (p->phy) {
1124 phy_stop(p->phy);
1125 p->old_pause = -1;
1126 p->old_link = -1;
1127 p->old_duplex = -1;
1128 phy_suspend(p->phy);
1129 }
1130
1131 return 0;
1132 }
1133
1134 int dsa_slave_resume(struct net_device *slave_dev)
1135 {
1136 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1137
1138 netif_device_attach(slave_dev);
1139
1140 if (p->phy) {
1141 phy_resume(p->phy);
1142 phy_start(p->phy);
1143 }
1144
1145 return 0;
1146 }
1147
1148 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1149 int port, const char *name)
1150 {
1151 struct dsa_switch_tree *dst = ds->dst;
1152 struct net_device *master;
1153 struct net_device *slave_dev;
1154 struct dsa_slave_priv *p;
1155 int ret;
1156
1157 master = ds->dst->master_netdev;
1158 if (ds->master_netdev)
1159 master = ds->master_netdev;
1160
1161 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1162 NET_NAME_UNKNOWN, ether_setup);
1163 if (slave_dev == NULL)
1164 return -ENOMEM;
1165
1166 slave_dev->features = master->vlan_features;
1167 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1168 eth_hw_addr_inherit(slave_dev, master);
1169 slave_dev->priv_flags |= IFF_NO_QUEUE;
1170 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1171 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1172 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1173
1174 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1175 NULL);
1176
1177 SET_NETDEV_DEV(slave_dev, parent);
1178 slave_dev->dev.of_node = ds->ports[port].dn;
1179 slave_dev->vlan_features = master->vlan_features;
1180
1181 p = netdev_priv(slave_dev);
1182 p->parent = ds;
1183 p->port = port;
1184 p->xmit = dst->tag_ops->xmit;
1185
1186 p->old_pause = -1;
1187 p->old_link = -1;
1188 p->old_duplex = -1;
1189
1190 ds->ports[port].netdev = slave_dev;
1191 ret = register_netdev(slave_dev);
1192 if (ret) {
1193 netdev_err(master, "error %d registering interface %s\n",
1194 ret, slave_dev->name);
1195 ds->ports[port].netdev = NULL;
1196 free_netdev(slave_dev);
1197 return ret;
1198 }
1199
1200 netif_carrier_off(slave_dev);
1201
1202 ret = dsa_slave_phy_setup(p, slave_dev);
1203 if (ret) {
1204 netdev_err(master, "error %d setting up slave phy\n", ret);
1205 unregister_netdev(slave_dev);
1206 free_netdev(slave_dev);
1207 return ret;
1208 }
1209
1210 return 0;
1211 }
1212
1213 void dsa_slave_destroy(struct net_device *slave_dev)
1214 {
1215 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1216
1217 netif_carrier_off(slave_dev);
1218 if (p->phy)
1219 phy_disconnect(p->phy);
1220 unregister_netdev(slave_dev);
1221 free_netdev(slave_dev);
1222 }
1223
1224 static bool dsa_slave_dev_check(struct net_device *dev)
1225 {
1226 return dev->netdev_ops == &dsa_slave_netdev_ops;
1227 }
1228
1229 static int dsa_slave_port_upper_event(struct net_device *dev,
1230 unsigned long event, void *ptr)
1231 {
1232 struct netdev_notifier_changeupper_info *info = ptr;
1233 struct net_device *upper = info->upper_dev;
1234 int err = 0;
1235
1236 switch (event) {
1237 case NETDEV_CHANGEUPPER:
1238 if (netif_is_bridge_master(upper)) {
1239 if (info->linking)
1240 err = dsa_slave_bridge_port_join(dev, upper);
1241 else
1242 dsa_slave_bridge_port_leave(dev);
1243 }
1244
1245 break;
1246 }
1247
1248 return notifier_from_errno(err);
1249 }
1250
1251 static int dsa_slave_port_event(struct net_device *dev, unsigned long event,
1252 void *ptr)
1253 {
1254 switch (event) {
1255 case NETDEV_CHANGEUPPER:
1256 return dsa_slave_port_upper_event(dev, event, ptr);
1257 }
1258
1259 return NOTIFY_DONE;
1260 }
1261
1262 int dsa_slave_netdevice_event(struct notifier_block *unused,
1263 unsigned long event, void *ptr)
1264 {
1265 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1266
1267 if (dsa_slave_dev_check(dev))
1268 return dsa_slave_port_event(dev, event, ptr);
1269
1270 return NOTIFY_DONE;
1271 }
Linux kernel - Deliverables
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