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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/pkt_cls.h>
21#include <net/tc_act/tc_mirred.h>
22#include <linux/if_bridge.h>
23#include <linux/netpoll.h>
24#include <linux/ptp_classify.h>
25
26#include "dsa_priv.h"
27
28static bool dsa_slave_dev_check(struct net_device *dev);
29
30/* slave mii_bus handling ***************************************************/
31static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
32{
33 struct dsa_switch *ds = bus->priv;
34
35 if (ds->phys_mii_mask & (1 << addr))
36 return ds->ops->phy_read(ds, addr, reg);
37
38 return 0xffff;
39}
40
41static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
42{
43 struct dsa_switch *ds = bus->priv;
44
45 if (ds->phys_mii_mask & (1 << addr))
46 return ds->ops->phy_write(ds, addr, reg, val);
47
48 return 0;
49}
50
51void dsa_slave_mii_bus_init(struct dsa_switch *ds)
52{
53 ds->slave_mii_bus->priv = (void *)ds;
54 ds->slave_mii_bus->name = "dsa slave smi";
55 ds->slave_mii_bus->read = dsa_slave_phy_read;
56 ds->slave_mii_bus->write = dsa_slave_phy_write;
57 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
58 ds->dst->index, ds->index);
59 ds->slave_mii_bus->parent = ds->dev;
60 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
61}
62
63
64/* slave device handling ****************************************************/
65static int dsa_slave_get_iflink(const struct net_device *dev)
66{
67 return dsa_slave_to_master(dev)->ifindex;
68}
69
70static int dsa_slave_open(struct net_device *dev)
71{
72 struct net_device *master = dsa_slave_to_master(dev);
73 struct dsa_port *dp = dsa_slave_to_port(dev);
74 int err;
75
76 if (!(master->flags & IFF_UP))
77 return -ENETDOWN;
78
79 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
80 err = dev_uc_add(master, dev->dev_addr);
81 if (err < 0)
82 goto out;
83 }
84
85 if (dev->flags & IFF_ALLMULTI) {
86 err = dev_set_allmulti(master, 1);
87 if (err < 0)
88 goto del_unicast;
89 }
90 if (dev->flags & IFF_PROMISC) {
91 err = dev_set_promiscuity(master, 1);
92 if (err < 0)
93 goto clear_allmulti;
94 }
95
96 err = dsa_port_enable(dp, dev->phydev);
97 if (err)
98 goto clear_promisc;
99
100 if (dev->phydev)
101 phy_start(dev->phydev);
102
103 return 0;
104
105clear_promisc:
106 if (dev->flags & IFF_PROMISC)
107 dev_set_promiscuity(master, -1);
108clear_allmulti:
109 if (dev->flags & IFF_ALLMULTI)
110 dev_set_allmulti(master, -1);
111del_unicast:
112 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
113 dev_uc_del(master, dev->dev_addr);
114out:
115 return err;
116}
117
118static int dsa_slave_close(struct net_device *dev)
119{
120 struct net_device *master = dsa_slave_to_master(dev);
121 struct dsa_port *dp = dsa_slave_to_port(dev);
122
123 if (dev->phydev)
124 phy_stop(dev->phydev);
125
126 dsa_port_disable(dp, dev->phydev);
127
128 dev_mc_unsync(master, dev);
129 dev_uc_unsync(master, dev);
130 if (dev->flags & IFF_ALLMULTI)
131 dev_set_allmulti(master, -1);
132 if (dev->flags & IFF_PROMISC)
133 dev_set_promiscuity(master, -1);
134
135 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
136 dev_uc_del(master, dev->dev_addr);
137
138 return 0;
139}
140
141static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
142{
143 struct net_device *master = dsa_slave_to_master(dev);
144
145 if (change & IFF_ALLMULTI)
146 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
147 if (change & IFF_PROMISC)
148 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
149}
150
151static void dsa_slave_set_rx_mode(struct net_device *dev)
152{
153 struct net_device *master = dsa_slave_to_master(dev);
154
155 dev_mc_sync(master, dev);
156 dev_uc_sync(master, dev);
157}
158
159static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
160{
161 struct net_device *master = dsa_slave_to_master(dev);
162 struct sockaddr *addr = a;
163 int err;
164
165 if (!is_valid_ether_addr(addr->sa_data))
166 return -EADDRNOTAVAIL;
167
168 if (!(dev->flags & IFF_UP))
169 goto out;
170
171 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
172 err = dev_uc_add(master, addr->sa_data);
173 if (err < 0)
174 return err;
175 }
176
177 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
178 dev_uc_del(master, dev->dev_addr);
179
180out:
181 ether_addr_copy(dev->dev_addr, addr->sa_data);
182
183 return 0;
184}
185
186struct dsa_slave_dump_ctx {
187 struct net_device *dev;
188 struct sk_buff *skb;
189 struct netlink_callback *cb;
190 int idx;
191};
192
193static int
194dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid,
195 bool is_static, void *data)
196{
197 struct dsa_slave_dump_ctx *dump = data;
198 u32 portid = NETLINK_CB(dump->cb->skb).portid;
199 u32 seq = dump->cb->nlh->nlmsg_seq;
200 struct nlmsghdr *nlh;
201 struct ndmsg *ndm;
202
203 if (dump->idx < dump->cb->args[2])
204 goto skip;
205
206 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
207 sizeof(*ndm), NLM_F_MULTI);
208 if (!nlh)
209 return -EMSGSIZE;
210
211 ndm = nlmsg_data(nlh);
212 ndm->ndm_family = AF_BRIDGE;
213 ndm->ndm_pad1 = 0;
214 ndm->ndm_pad2 = 0;
215 ndm->ndm_flags = NTF_SELF;
216 ndm->ndm_type = 0;
217 ndm->ndm_ifindex = dump->dev->ifindex;
218 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
219
220 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
221 goto nla_put_failure;
222
223 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
224 goto nla_put_failure;
225
226 nlmsg_end(dump->skb, nlh);
227
228skip:
229 dump->idx++;
230 return 0;
231
232nla_put_failure:
233 nlmsg_cancel(dump->skb, nlh);
234 return -EMSGSIZE;
235}
236
237static int
238dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
239 struct net_device *dev, struct net_device *filter_dev,
240 int *idx)
241{
242 struct dsa_port *dp = dsa_slave_to_port(dev);
243 struct dsa_slave_dump_ctx dump = {
244 .dev = dev,
245 .skb = skb,
246 .cb = cb,
247 .idx = *idx,
248 };
249 int err;
250
251 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump);
252 *idx = dump.idx;
253
254 return err;
255}
256
257static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
258{
259 struct dsa_slave_priv *p = netdev_priv(dev);
260 struct dsa_switch *ds = p->dp->ds;
261 int port = p->dp->index;
262
263 /* Pass through to switch driver if it supports timestamping */
264 switch (cmd) {
265 case SIOCGHWTSTAMP:
266 if (ds->ops->port_hwtstamp_get)
267 return ds->ops->port_hwtstamp_get(ds, port, ifr);
268 break;
269 case SIOCSHWTSTAMP:
270 if (ds->ops->port_hwtstamp_set)
271 return ds->ops->port_hwtstamp_set(ds, port, ifr);
272 break;
273 }
274
275 if (!dev->phydev)
276 return -ENODEV;
277
278 return phy_mii_ioctl(dev->phydev, ifr, cmd);
279}
280
281static int dsa_slave_port_attr_set(struct net_device *dev,
282 const struct switchdev_attr *attr,
283 struct switchdev_trans *trans)
284{
285 struct dsa_port *dp = dsa_slave_to_port(dev);
286 int ret;
287
288 switch (attr->id) {
289 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
290 ret = dsa_port_set_state(dp, attr->u.stp_state, trans);
291 break;
292 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
293 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
294 trans);
295 break;
296 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
297 ret = dsa_port_ageing_time(dp, attr->u.ageing_time, trans);
298 break;
299 default:
300 ret = -EOPNOTSUPP;
301 break;
302 }
303
304 return ret;
305}
306
307static int dsa_slave_port_obj_add(struct net_device *dev,
308 const struct switchdev_obj *obj,
309 struct switchdev_trans *trans)
310{
311 struct dsa_port *dp = dsa_slave_to_port(dev);
312 int err;
313
314 /* For the prepare phase, ensure the full set of changes is feasable in
315 * one go in order to signal a failure properly. If an operation is not
316 * supported, return -EOPNOTSUPP.
317 */
318
319 switch (obj->id) {
320 case SWITCHDEV_OBJ_ID_PORT_MDB:
321 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans);
322 break;
323 case SWITCHDEV_OBJ_ID_HOST_MDB:
324 /* DSA can directly translate this to a normal MDB add,
325 * but on the CPU port.
326 */
327 err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj),
328 trans);
329 break;
330 case SWITCHDEV_OBJ_ID_PORT_VLAN:
331 err = dsa_port_vlan_add(dp, SWITCHDEV_OBJ_PORT_VLAN(obj),
332 trans);
333 break;
334 default:
335 err = -EOPNOTSUPP;
336 break;
337 }
338
339 return err;
340}
341
342static int dsa_slave_port_obj_del(struct net_device *dev,
343 const struct switchdev_obj *obj)
344{
345 struct dsa_port *dp = dsa_slave_to_port(dev);
346 int err;
347
348 switch (obj->id) {
349 case SWITCHDEV_OBJ_ID_PORT_MDB:
350 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
351 break;
352 case SWITCHDEV_OBJ_ID_HOST_MDB:
353 /* DSA can directly translate this to a normal MDB add,
354 * but on the CPU port.
355 */
356 err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj));
357 break;
358 case SWITCHDEV_OBJ_ID_PORT_VLAN:
359 err = dsa_port_vlan_del(dp, SWITCHDEV_OBJ_PORT_VLAN(obj));
360 break;
361 default:
362 err = -EOPNOTSUPP;
363 break;
364 }
365
366 return err;
367}
368
369static int dsa_slave_port_attr_get(struct net_device *dev,
370 struct switchdev_attr *attr)
371{
372 struct dsa_port *dp = dsa_slave_to_port(dev);
373 struct dsa_switch *ds = dp->ds;
374 struct dsa_switch_tree *dst = ds->dst;
375
376 switch (attr->id) {
377 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
378 attr->u.ppid.id_len = sizeof(dst->index);
379 memcpy(&attr->u.ppid.id, &dst->index, attr->u.ppid.id_len);
380 break;
381 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT:
382 attr->u.brport_flags_support = 0;
383 break;
384 default:
385 return -EOPNOTSUPP;
386 }
387
388 return 0;
389}
390
391static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
392 struct sk_buff *skb)
393{
394#ifdef CONFIG_NET_POLL_CONTROLLER
395 struct dsa_slave_priv *p = netdev_priv(dev);
396
397 if (p->netpoll)
398 netpoll_send_skb(p->netpoll, skb);
399#else
400 BUG();
401#endif
402 return NETDEV_TX_OK;
403}
404
405static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
406 struct sk_buff *skb)
407{
408 struct dsa_switch *ds = p->dp->ds;
409 struct sk_buff *clone;
410 unsigned int type;
411
412 type = ptp_classify_raw(skb);
413 if (type == PTP_CLASS_NONE)
414 return;
415
416 if (!ds->ops->port_txtstamp)
417 return;
418
419 clone = skb_clone_sk(skb);
420 if (!clone)
421 return;
422
423 if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type))
424 return;
425
426 kfree_skb(clone);
427}
428
429static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
430{
431 struct dsa_slave_priv *p = netdev_priv(dev);
432 struct pcpu_sw_netstats *s;
433 struct sk_buff *nskb;
434
435 s = this_cpu_ptr(p->stats64);
436 u64_stats_update_begin(&s->syncp);
437 s->tx_packets++;
438 s->tx_bytes += skb->len;
439 u64_stats_update_end(&s->syncp);
440
441 /* Identify PTP protocol packets, clone them, and pass them to the
442 * switch driver
443 */
444 dsa_skb_tx_timestamp(p, skb);
445
446 /* Transmit function may have to reallocate the original SKB,
447 * in which case it must have freed it. Only free it here on error.
448 */
449 nskb = p->xmit(skb, dev);
450 if (!nskb) {
451 kfree_skb(skb);
452 return NETDEV_TX_OK;
453 }
454
455 /* SKB for netpoll still need to be mangled with the protocol-specific
456 * tag to be successfully transmitted
457 */
458 if (unlikely(netpoll_tx_running(dev)))
459 return dsa_slave_netpoll_send_skb(dev, nskb);
460
461 /* Queue the SKB for transmission on the parent interface, but
462 * do not modify its EtherType
463 */
464 nskb->dev = dsa_slave_to_master(dev);
465 dev_queue_xmit(nskb);
466
467 return NETDEV_TX_OK;
468}
469
470/* ethtool operations *******************************************************/
471
472static void dsa_slave_get_drvinfo(struct net_device *dev,
473 struct ethtool_drvinfo *drvinfo)
474{
475 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
476 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
477 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
478}
479
480static int dsa_slave_get_regs_len(struct net_device *dev)
481{
482 struct dsa_port *dp = dsa_slave_to_port(dev);
483 struct dsa_switch *ds = dp->ds;
484
485 if (ds->ops->get_regs_len)
486 return ds->ops->get_regs_len(ds, dp->index);
487
488 return -EOPNOTSUPP;
489}
490
491static void
492dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
493{
494 struct dsa_port *dp = dsa_slave_to_port(dev);
495 struct dsa_switch *ds = dp->ds;
496
497 if (ds->ops->get_regs)
498 ds->ops->get_regs(ds, dp->index, regs, _p);
499}
500
501static u32 dsa_slave_get_link(struct net_device *dev)
502{
503 if (!dev->phydev)
504 return -ENODEV;
505
506 genphy_update_link(dev->phydev);
507
508 return dev->phydev->link;
509}
510
511static int dsa_slave_get_eeprom_len(struct net_device *dev)
512{
513 struct dsa_port *dp = dsa_slave_to_port(dev);
514 struct dsa_switch *ds = dp->ds;
515
516 if (ds->cd && ds->cd->eeprom_len)
517 return ds->cd->eeprom_len;
518
519 if (ds->ops->get_eeprom_len)
520 return ds->ops->get_eeprom_len(ds);
521
522 return 0;
523}
524
525static int dsa_slave_get_eeprom(struct net_device *dev,
526 struct ethtool_eeprom *eeprom, u8 *data)
527{
528 struct dsa_port *dp = dsa_slave_to_port(dev);
529 struct dsa_switch *ds = dp->ds;
530
531 if (ds->ops->get_eeprom)
532 return ds->ops->get_eeprom(ds, eeprom, data);
533
534 return -EOPNOTSUPP;
535}
536
537static int dsa_slave_set_eeprom(struct net_device *dev,
538 struct ethtool_eeprom *eeprom, u8 *data)
539{
540 struct dsa_port *dp = dsa_slave_to_port(dev);
541 struct dsa_switch *ds = dp->ds;
542
543 if (ds->ops->set_eeprom)
544 return ds->ops->set_eeprom(ds, eeprom, data);
545
546 return -EOPNOTSUPP;
547}
548
549static void dsa_slave_get_strings(struct net_device *dev,
550 uint32_t stringset, uint8_t *data)
551{
552 struct dsa_port *dp = dsa_slave_to_port(dev);
553 struct dsa_switch *ds = dp->ds;
554
555 if (stringset == ETH_SS_STATS) {
556 int len = ETH_GSTRING_LEN;
557
558 strncpy(data, "tx_packets", len);
559 strncpy(data + len, "tx_bytes", len);
560 strncpy(data + 2 * len, "rx_packets", len);
561 strncpy(data + 3 * len, "rx_bytes", len);
562 if (ds->ops->get_strings)
563 ds->ops->get_strings(ds, dp->index, data + 4 * len);
564 }
565}
566
567static void dsa_slave_get_ethtool_stats(struct net_device *dev,
568 struct ethtool_stats *stats,
569 uint64_t *data)
570{
571 struct dsa_port *dp = dsa_slave_to_port(dev);
572 struct dsa_slave_priv *p = netdev_priv(dev);
573 struct dsa_switch *ds = dp->ds;
574 struct pcpu_sw_netstats *s;
575 unsigned int start;
576 int i;
577
578 for_each_possible_cpu(i) {
579 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
580
581 s = per_cpu_ptr(p->stats64, i);
582 do {
583 start = u64_stats_fetch_begin_irq(&s->syncp);
584 tx_packets = s->tx_packets;
585 tx_bytes = s->tx_bytes;
586 rx_packets = s->rx_packets;
587 rx_bytes = s->rx_bytes;
588 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
589 data[0] += tx_packets;
590 data[1] += tx_bytes;
591 data[2] += rx_packets;
592 data[3] += rx_bytes;
593 }
594 if (ds->ops->get_ethtool_stats)
595 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
596}
597
598static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
599{
600 struct dsa_port *dp = dsa_slave_to_port(dev);
601 struct dsa_switch *ds = dp->ds;
602
603 if (sset == ETH_SS_STATS) {
604 int count;
605
606 count = 4;
607 if (ds->ops->get_sset_count)
608 count += ds->ops->get_sset_count(ds, dp->index);
609
610 return count;
611 }
612
613 return -EOPNOTSUPP;
614}
615
616static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
617{
618 struct dsa_port *dp = dsa_slave_to_port(dev);
619 struct dsa_switch *ds = dp->ds;
620
621 if (ds->ops->get_wol)
622 ds->ops->get_wol(ds, dp->index, w);
623}
624
625static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
626{
627 struct dsa_port *dp = dsa_slave_to_port(dev);
628 struct dsa_switch *ds = dp->ds;
629 int ret = -EOPNOTSUPP;
630
631 if (ds->ops->set_wol)
632 ret = ds->ops->set_wol(ds, dp->index, w);
633
634 return ret;
635}
636
637static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
638{
639 struct dsa_port *dp = dsa_slave_to_port(dev);
640 struct dsa_switch *ds = dp->ds;
641 int ret;
642
643 /* Port's PHY and MAC both need to be EEE capable */
644 if (!dev->phydev)
645 return -ENODEV;
646
647 if (!ds->ops->set_mac_eee)
648 return -EOPNOTSUPP;
649
650 ret = ds->ops->set_mac_eee(ds, dp->index, e);
651 if (ret)
652 return ret;
653
654 if (e->eee_enabled) {
655 ret = phy_init_eee(dev->phydev, 0);
656 if (ret)
657 return ret;
658 }
659
660 return phy_ethtool_set_eee(dev->phydev, e);
661}
662
663static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
664{
665 struct dsa_port *dp = dsa_slave_to_port(dev);
666 struct dsa_switch *ds = dp->ds;
667 int ret;
668
669 /* Port's PHY and MAC both need to be EEE capable */
670 if (!dev->phydev)
671 return -ENODEV;
672
673 if (!ds->ops->get_mac_eee)
674 return -EOPNOTSUPP;
675
676 ret = ds->ops->get_mac_eee(ds, dp->index, e);
677 if (ret)
678 return ret;
679
680 return phy_ethtool_get_eee(dev->phydev, e);
681}
682
683#ifdef CONFIG_NET_POLL_CONTROLLER
684static int dsa_slave_netpoll_setup(struct net_device *dev,
685 struct netpoll_info *ni)
686{
687 struct net_device *master = dsa_slave_to_master(dev);
688 struct dsa_slave_priv *p = netdev_priv(dev);
689 struct netpoll *netpoll;
690 int err = 0;
691
692 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
693 if (!netpoll)
694 return -ENOMEM;
695
696 err = __netpoll_setup(netpoll, master);
697 if (err) {
698 kfree(netpoll);
699 goto out;
700 }
701
702 p->netpoll = netpoll;
703out:
704 return err;
705}
706
707static void dsa_slave_netpoll_cleanup(struct net_device *dev)
708{
709 struct dsa_slave_priv *p = netdev_priv(dev);
710 struct netpoll *netpoll = p->netpoll;
711
712 if (!netpoll)
713 return;
714
715 p->netpoll = NULL;
716
717 __netpoll_free_async(netpoll);
718}
719
720static void dsa_slave_poll_controller(struct net_device *dev)
721{
722}
723#endif
724
725static int dsa_slave_get_phys_port_name(struct net_device *dev,
726 char *name, size_t len)
727{
728 struct dsa_port *dp = dsa_slave_to_port(dev);
729
730 if (snprintf(name, len, "p%d", dp->index) >= len)
731 return -EINVAL;
732
733 return 0;
734}
735
736static struct dsa_mall_tc_entry *
737dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
738{
739 struct dsa_slave_priv *p = netdev_priv(dev);
740 struct dsa_mall_tc_entry *mall_tc_entry;
741
742 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
743 if (mall_tc_entry->cookie == cookie)
744 return mall_tc_entry;
745
746 return NULL;
747}
748
749static int dsa_slave_add_cls_matchall(struct net_device *dev,
750 struct tc_cls_matchall_offload *cls,
751 bool ingress)
752{
753 struct dsa_port *dp = dsa_slave_to_port(dev);
754 struct dsa_slave_priv *p = netdev_priv(dev);
755 struct dsa_mall_tc_entry *mall_tc_entry;
756 __be16 protocol = cls->common.protocol;
757 struct dsa_switch *ds = dp->ds;
758 struct net_device *to_dev;
759 const struct tc_action *a;
760 struct dsa_port *to_dp;
761 int err = -EOPNOTSUPP;
762 LIST_HEAD(actions);
763
764 if (!ds->ops->port_mirror_add)
765 return err;
766
767 if (!tcf_exts_has_one_action(cls->exts))
768 return err;
769
770 tcf_exts_to_list(cls->exts, &actions);
771 a = list_first_entry(&actions, struct tc_action, list);
772
773 if (is_tcf_mirred_egress_mirror(a) && protocol == htons(ETH_P_ALL)) {
774 struct dsa_mall_mirror_tc_entry *mirror;
775
776 to_dev = tcf_mirred_dev(a);
777 if (!to_dev)
778 return -EINVAL;
779
780 if (!dsa_slave_dev_check(to_dev))
781 return -EOPNOTSUPP;
782
783 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
784 if (!mall_tc_entry)
785 return -ENOMEM;
786
787 mall_tc_entry->cookie = cls->cookie;
788 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
789 mirror = &mall_tc_entry->mirror;
790
791 to_dp = dsa_slave_to_port(to_dev);
792
793 mirror->to_local_port = to_dp->index;
794 mirror->ingress = ingress;
795
796 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
797 if (err) {
798 kfree(mall_tc_entry);
799 return err;
800 }
801
802 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
803 }
804
805 return 0;
806}
807
808static void dsa_slave_del_cls_matchall(struct net_device *dev,
809 struct tc_cls_matchall_offload *cls)
810{
811 struct dsa_port *dp = dsa_slave_to_port(dev);
812 struct dsa_mall_tc_entry *mall_tc_entry;
813 struct dsa_switch *ds = dp->ds;
814
815 if (!ds->ops->port_mirror_del)
816 return;
817
818 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
819 if (!mall_tc_entry)
820 return;
821
822 list_del(&mall_tc_entry->list);
823
824 switch (mall_tc_entry->type) {
825 case DSA_PORT_MALL_MIRROR:
826 ds->ops->port_mirror_del(ds, dp->index, &mall_tc_entry->mirror);
827 break;
828 default:
829 WARN_ON(1);
830 }
831
832 kfree(mall_tc_entry);
833}
834
835static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
836 struct tc_cls_matchall_offload *cls,
837 bool ingress)
838{
839 if (cls->common.chain_index)
840 return -EOPNOTSUPP;
841
842 switch (cls->command) {
843 case TC_CLSMATCHALL_REPLACE:
844 return dsa_slave_add_cls_matchall(dev, cls, ingress);
845 case TC_CLSMATCHALL_DESTROY:
846 dsa_slave_del_cls_matchall(dev, cls);
847 return 0;
848 default:
849 return -EOPNOTSUPP;
850 }
851}
852
853static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
854 void *cb_priv, bool ingress)
855{
856 struct net_device *dev = cb_priv;
857
858 if (!tc_can_offload(dev))
859 return -EOPNOTSUPP;
860
861 switch (type) {
862 case TC_SETUP_CLSMATCHALL:
863 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
864 default:
865 return -EOPNOTSUPP;
866 }
867}
868
869static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
870 void *type_data, void *cb_priv)
871{
872 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
873}
874
875static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
876 void *type_data, void *cb_priv)
877{
878 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
879}
880
881static int dsa_slave_setup_tc_block(struct net_device *dev,
882 struct tc_block_offload *f)
883{
884 tc_setup_cb_t *cb;
885
886 if (f->binder_type == TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
887 cb = dsa_slave_setup_tc_block_cb_ig;
888 else if (f->binder_type == TCF_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
889 cb = dsa_slave_setup_tc_block_cb_eg;
890 else
891 return -EOPNOTSUPP;
892
893 switch (f->command) {
894 case TC_BLOCK_BIND:
895 return tcf_block_cb_register(f->block, cb, dev, dev);
896 case TC_BLOCK_UNBIND:
897 tcf_block_cb_unregister(f->block, cb, dev);
898 return 0;
899 default:
900 return -EOPNOTSUPP;
901 }
902}
903
904static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
905 void *type_data)
906{
907 switch (type) {
908 case TC_SETUP_BLOCK:
909 return dsa_slave_setup_tc_block(dev, type_data);
910 default:
911 return -EOPNOTSUPP;
912 }
913}
914
915static void dsa_slave_get_stats64(struct net_device *dev,
916 struct rtnl_link_stats64 *stats)
917{
918 struct dsa_slave_priv *p = netdev_priv(dev);
919 struct pcpu_sw_netstats *s;
920 unsigned int start;
921 int i;
922
923 netdev_stats_to_stats64(stats, &dev->stats);
924 for_each_possible_cpu(i) {
925 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
926
927 s = per_cpu_ptr(p->stats64, i);
928 do {
929 start = u64_stats_fetch_begin_irq(&s->syncp);
930 tx_packets = s->tx_packets;
931 tx_bytes = s->tx_bytes;
932 rx_packets = s->rx_packets;
933 rx_bytes = s->rx_bytes;
934 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
935
936 stats->tx_packets += tx_packets;
937 stats->tx_bytes += tx_bytes;
938 stats->rx_packets += rx_packets;
939 stats->rx_bytes += rx_bytes;
940 }
941}
942
943static int dsa_slave_get_rxnfc(struct net_device *dev,
944 struct ethtool_rxnfc *nfc, u32 *rule_locs)
945{
946 struct dsa_port *dp = dsa_slave_to_port(dev);
947 struct dsa_switch *ds = dp->ds;
948
949 if (!ds->ops->get_rxnfc)
950 return -EOPNOTSUPP;
951
952 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
953}
954
955static int dsa_slave_set_rxnfc(struct net_device *dev,
956 struct ethtool_rxnfc *nfc)
957{
958 struct dsa_port *dp = dsa_slave_to_port(dev);
959 struct dsa_switch *ds = dp->ds;
960
961 if (!ds->ops->set_rxnfc)
962 return -EOPNOTSUPP;
963
964 return ds->ops->set_rxnfc(ds, dp->index, nfc);
965}
966
967static int dsa_slave_get_ts_info(struct net_device *dev,
968 struct ethtool_ts_info *ts)
969{
970 struct dsa_slave_priv *p = netdev_priv(dev);
971 struct dsa_switch *ds = p->dp->ds;
972
973 if (!ds->ops->get_ts_info)
974 return -EOPNOTSUPP;
975
976 return ds->ops->get_ts_info(ds, p->dp->index, ts);
977}
978
979static const struct ethtool_ops dsa_slave_ethtool_ops = {
980 .get_drvinfo = dsa_slave_get_drvinfo,
981 .get_regs_len = dsa_slave_get_regs_len,
982 .get_regs = dsa_slave_get_regs,
983 .nway_reset = phy_ethtool_nway_reset,
984 .get_link = dsa_slave_get_link,
985 .get_eeprom_len = dsa_slave_get_eeprom_len,
986 .get_eeprom = dsa_slave_get_eeprom,
987 .set_eeprom = dsa_slave_set_eeprom,
988 .get_strings = dsa_slave_get_strings,
989 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
990 .get_sset_count = dsa_slave_get_sset_count,
991 .set_wol = dsa_slave_set_wol,
992 .get_wol = dsa_slave_get_wol,
993 .set_eee = dsa_slave_set_eee,
994 .get_eee = dsa_slave_get_eee,
995 .get_link_ksettings = phy_ethtool_get_link_ksettings,
996 .set_link_ksettings = phy_ethtool_set_link_ksettings,
997 .get_rxnfc = dsa_slave_get_rxnfc,
998 .set_rxnfc = dsa_slave_set_rxnfc,
999 .get_ts_info = dsa_slave_get_ts_info,
1000};
1001
1002/* legacy way, bypassing the bridge *****************************************/
1003int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
1004 struct net_device *dev,
1005 const unsigned char *addr, u16 vid,
1006 u16 flags)
1007{
1008 struct dsa_port *dp = dsa_slave_to_port(dev);
1009
1010 return dsa_port_fdb_add(dp, addr, vid);
1011}
1012
1013int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
1014 struct net_device *dev,
1015 const unsigned char *addr, u16 vid)
1016{
1017 struct dsa_port *dp = dsa_slave_to_port(dev);
1018
1019 return dsa_port_fdb_del(dp, addr, vid);
1020}
1021
1022static const struct net_device_ops dsa_slave_netdev_ops = {
1023 .ndo_open = dsa_slave_open,
1024 .ndo_stop = dsa_slave_close,
1025 .ndo_start_xmit = dsa_slave_xmit,
1026 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
1027 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
1028 .ndo_set_mac_address = dsa_slave_set_mac_address,
1029 .ndo_fdb_add = dsa_legacy_fdb_add,
1030 .ndo_fdb_del = dsa_legacy_fdb_del,
1031 .ndo_fdb_dump = dsa_slave_fdb_dump,
1032 .ndo_do_ioctl = dsa_slave_ioctl,
1033 .ndo_get_iflink = dsa_slave_get_iflink,
1034#ifdef CONFIG_NET_POLL_CONTROLLER
1035 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
1036 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
1037 .ndo_poll_controller = dsa_slave_poll_controller,
1038#endif
1039 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
1040 .ndo_setup_tc = dsa_slave_setup_tc,
1041 .ndo_get_stats64 = dsa_slave_get_stats64,
1042};
1043
1044static const struct switchdev_ops dsa_slave_switchdev_ops = {
1045 .switchdev_port_attr_get = dsa_slave_port_attr_get,
1046 .switchdev_port_attr_set = dsa_slave_port_attr_set,
1047 .switchdev_port_obj_add = dsa_slave_port_obj_add,
1048 .switchdev_port_obj_del = dsa_slave_port_obj_del,
1049};
1050
1051static struct device_type dsa_type = {
1052 .name = "dsa",
1053};
1054
1055static void dsa_slave_adjust_link(struct net_device *dev)
1056{
1057 struct dsa_port *dp = dsa_slave_to_port(dev);
1058 struct dsa_slave_priv *p = netdev_priv(dev);
1059 struct dsa_switch *ds = dp->ds;
1060 unsigned int status_changed = 0;
1061
1062 if (p->old_link != dev->phydev->link) {
1063 status_changed = 1;
1064 p->old_link = dev->phydev->link;
1065 }
1066
1067 if (p->old_duplex != dev->phydev->duplex) {
1068 status_changed = 1;
1069 p->old_duplex = dev->phydev->duplex;
1070 }
1071
1072 if (p->old_pause != dev->phydev->pause) {
1073 status_changed = 1;
1074 p->old_pause = dev->phydev->pause;
1075 }
1076
1077 if (ds->ops->adjust_link && status_changed)
1078 ds->ops->adjust_link(ds, dp->index, dev->phydev);
1079
1080 if (status_changed)
1081 phy_print_status(dev->phydev);
1082}
1083
1084static int dsa_slave_fixed_link_update(struct net_device *dev,
1085 struct fixed_phy_status *status)
1086{
1087 struct dsa_switch *ds;
1088 struct dsa_port *dp;
1089
1090 if (dev) {
1091 dp = dsa_slave_to_port(dev);
1092 ds = dp->ds;
1093 if (ds->ops->fixed_link_update)
1094 ds->ops->fixed_link_update(ds, dp->index, status);
1095 }
1096
1097 return 0;
1098}
1099
1100/* slave device setup *******************************************************/
1101static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
1102{
1103 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1104 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1105 struct dsa_switch *ds = dp->ds;
1106
1107 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
1108 if (!slave_dev->phydev) {
1109 netdev_err(slave_dev, "no phy at %d\n", addr);
1110 return -ENODEV;
1111 }
1112
1113 /* Use already configured phy mode */
1114 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1115 p->phy_interface = slave_dev->phydev->interface;
1116
1117 return phy_connect_direct(slave_dev, slave_dev->phydev,
1118 dsa_slave_adjust_link, p->phy_interface);
1119}
1120
1121static int dsa_slave_phy_setup(struct net_device *slave_dev)
1122{
1123 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1124 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1125 struct device_node *port_dn = dp->dn;
1126 struct dsa_switch *ds = dp->ds;
1127 struct device_node *phy_dn;
1128 bool phy_is_fixed = false;
1129 u32 phy_flags = 0;
1130 int mode, ret;
1131
1132 mode = of_get_phy_mode(port_dn);
1133 if (mode < 0)
1134 mode = PHY_INTERFACE_MODE_NA;
1135 p->phy_interface = mode;
1136
1137 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1138 if (!phy_dn && of_phy_is_fixed_link(port_dn)) {
1139 /* In the case of a fixed PHY, the DT node associated
1140 * to the fixed PHY is the Port DT node
1141 */
1142 ret = of_phy_register_fixed_link(port_dn);
1143 if (ret) {
1144 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
1145 return ret;
1146 }
1147 phy_is_fixed = true;
1148 phy_dn = of_node_get(port_dn);
1149 }
1150
1151 if (ds->ops->get_phy_flags)
1152 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
1153
1154 if (phy_dn) {
1155 slave_dev->phydev = of_phy_connect(slave_dev, phy_dn,
1156 dsa_slave_adjust_link,
1157 phy_flags,
1158 p->phy_interface);
1159 of_node_put(phy_dn);
1160 }
1161
1162 if (slave_dev->phydev && phy_is_fixed)
1163 fixed_phy_set_link_update(slave_dev->phydev,
1164 dsa_slave_fixed_link_update);
1165
1166 /* We could not connect to a designated PHY, so use the switch internal
1167 * MDIO bus instead
1168 */
1169 if (!slave_dev->phydev) {
1170 ret = dsa_slave_phy_connect(slave_dev, dp->index);
1171 if (ret) {
1172 netdev_err(slave_dev, "failed to connect to port %d: %d\n",
1173 dp->index, ret);
1174 if (phy_is_fixed)
1175 of_phy_deregister_fixed_link(port_dn);
1176 return ret;
1177 }
1178 }
1179
1180 phy_attached_info(slave_dev->phydev);
1181
1182 return 0;
1183}
1184
1185static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1186static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1187 struct netdev_queue *txq,
1188 void *_unused)
1189{
1190 lockdep_set_class(&txq->_xmit_lock,
1191 &dsa_slave_netdev_xmit_lock_key);
1192}
1193
1194int dsa_slave_suspend(struct net_device *slave_dev)
1195{
1196 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1197
1198 netif_device_detach(slave_dev);
1199
1200 if (slave_dev->phydev) {
1201 phy_stop(slave_dev->phydev);
1202 p->old_pause = -1;
1203 p->old_link = -1;
1204 p->old_duplex = -1;
1205 phy_suspend(slave_dev->phydev);
1206 }
1207
1208 return 0;
1209}
1210
1211int dsa_slave_resume(struct net_device *slave_dev)
1212{
1213 netif_device_attach(slave_dev);
1214
1215 if (slave_dev->phydev) {
1216 phy_resume(slave_dev->phydev);
1217 phy_start(slave_dev->phydev);
1218 }
1219
1220 return 0;
1221}
1222
1223static void dsa_slave_notify(struct net_device *dev, unsigned long val)
1224{
1225 struct net_device *master = dsa_slave_to_master(dev);
1226 struct dsa_port *dp = dsa_slave_to_port(dev);
1227 struct dsa_notifier_register_info rinfo = {
1228 .switch_number = dp->ds->index,
1229 .port_number = dp->index,
1230 .master = master,
1231 .info.dev = dev,
1232 };
1233
1234 call_dsa_notifiers(val, dev, &rinfo.info);
1235}
1236
1237int dsa_slave_create(struct dsa_port *port)
1238{
1239 const struct dsa_port *cpu_dp = port->cpu_dp;
1240 struct net_device *master = cpu_dp->master;
1241 struct dsa_switch *ds = port->ds;
1242 const char *name = port->name;
1243 struct net_device *slave_dev;
1244 struct dsa_slave_priv *p;
1245 int ret;
1246
1247 if (!ds->num_tx_queues)
1248 ds->num_tx_queues = 1;
1249
1250 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
1251 NET_NAME_UNKNOWN, ether_setup,
1252 ds->num_tx_queues, 1);
1253 if (slave_dev == NULL)
1254 return -ENOMEM;
1255
1256 slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
1257 slave_dev->hw_features |= NETIF_F_HW_TC;
1258 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1259 eth_hw_addr_inherit(slave_dev, master);
1260 slave_dev->priv_flags |= IFF_NO_QUEUE;
1261 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1262 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1263 slave_dev->min_mtu = 0;
1264 slave_dev->max_mtu = ETH_MAX_MTU;
1265 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1266
1267 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1268 NULL);
1269
1270 SET_NETDEV_DEV(slave_dev, port->ds->dev);
1271 slave_dev->dev.of_node = port->dn;
1272 slave_dev->vlan_features = master->vlan_features;
1273
1274 p = netdev_priv(slave_dev);
1275 p->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1276 if (!p->stats64) {
1277 free_netdev(slave_dev);
1278 return -ENOMEM;
1279 }
1280 p->dp = port;
1281 INIT_LIST_HEAD(&p->mall_tc_list);
1282 p->xmit = cpu_dp->tag_ops->xmit;
1283
1284 p->old_pause = -1;
1285 p->old_link = -1;
1286 p->old_duplex = -1;
1287
1288 port->slave = slave_dev;
1289
1290 netif_carrier_off(slave_dev);
1291
1292 ret = dsa_slave_phy_setup(slave_dev);
1293 if (ret) {
1294 netdev_err(master, "error %d setting up slave phy\n", ret);
1295 goto out_free;
1296 }
1297
1298 dsa_slave_notify(slave_dev, DSA_PORT_REGISTER);
1299
1300 ret = register_netdev(slave_dev);
1301 if (ret) {
1302 netdev_err(master, "error %d registering interface %s\n",
1303 ret, slave_dev->name);
1304 goto out_phy;
1305 }
1306
1307 return 0;
1308
1309out_phy:
1310 phy_disconnect(slave_dev->phydev);
1311 if (of_phy_is_fixed_link(port->dn))
1312 of_phy_deregister_fixed_link(port->dn);
1313out_free:
1314 free_percpu(p->stats64);
1315 free_netdev(slave_dev);
1316 port->slave = NULL;
1317 return ret;
1318}
1319
1320void dsa_slave_destroy(struct net_device *slave_dev)
1321{
1322 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1323 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1324 struct device_node *port_dn = dp->dn;
1325
1326 netif_carrier_off(slave_dev);
1327 if (slave_dev->phydev) {
1328 phy_disconnect(slave_dev->phydev);
1329
1330 if (of_phy_is_fixed_link(port_dn))
1331 of_phy_deregister_fixed_link(port_dn);
1332 }
1333 dsa_slave_notify(slave_dev, DSA_PORT_UNREGISTER);
1334 unregister_netdev(slave_dev);
1335 free_percpu(p->stats64);
1336 free_netdev(slave_dev);
1337}
1338
1339static bool dsa_slave_dev_check(struct net_device *dev)
1340{
1341 return dev->netdev_ops == &dsa_slave_netdev_ops;
1342}
1343
1344static int dsa_slave_changeupper(struct net_device *dev,
1345 struct netdev_notifier_changeupper_info *info)
1346{
1347 struct dsa_port *dp = dsa_slave_to_port(dev);
1348 int err = NOTIFY_DONE;
1349
1350 if (netif_is_bridge_master(info->upper_dev)) {
1351 if (info->linking) {
1352 err = dsa_port_bridge_join(dp, info->upper_dev);
1353 err = notifier_from_errno(err);
1354 } else {
1355 dsa_port_bridge_leave(dp, info->upper_dev);
1356 err = NOTIFY_OK;
1357 }
1358 }
1359
1360 return err;
1361}
1362
1363static int dsa_slave_netdevice_event(struct notifier_block *nb,
1364 unsigned long event, void *ptr)
1365{
1366 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1367
1368 if (!dsa_slave_dev_check(dev))
1369 return NOTIFY_DONE;
1370
1371 if (event == NETDEV_CHANGEUPPER)
1372 return dsa_slave_changeupper(dev, ptr);
1373
1374 return NOTIFY_DONE;
1375}
1376
1377struct dsa_switchdev_event_work {
1378 struct work_struct work;
1379 struct switchdev_notifier_fdb_info fdb_info;
1380 struct net_device *dev;
1381 unsigned long event;
1382};
1383
1384static void dsa_slave_switchdev_event_work(struct work_struct *work)
1385{
1386 struct dsa_switchdev_event_work *switchdev_work =
1387 container_of(work, struct dsa_switchdev_event_work, work);
1388 struct net_device *dev = switchdev_work->dev;
1389 struct switchdev_notifier_fdb_info *fdb_info;
1390 struct dsa_port *dp = dsa_slave_to_port(dev);
1391 int err;
1392
1393 rtnl_lock();
1394 switch (switchdev_work->event) {
1395 case SWITCHDEV_FDB_ADD_TO_DEVICE:
1396 fdb_info = &switchdev_work->fdb_info;
1397 err = dsa_port_fdb_add(dp, fdb_info->addr, fdb_info->vid);
1398 if (err) {
1399 netdev_dbg(dev, "fdb add failed err=%d\n", err);
1400 break;
1401 }
1402 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, dev,
1403 &fdb_info->info);
1404 break;
1405
1406 case SWITCHDEV_FDB_DEL_TO_DEVICE:
1407 fdb_info = &switchdev_work->fdb_info;
1408 err = dsa_port_fdb_del(dp, fdb_info->addr, fdb_info->vid);
1409 if (err) {
1410 netdev_dbg(dev, "fdb del failed err=%d\n", err);
1411 dev_close(dev);
1412 }
1413 break;
1414 }
1415 rtnl_unlock();
1416
1417 kfree(switchdev_work->fdb_info.addr);
1418 kfree(switchdev_work);
1419 dev_put(dev);
1420}
1421
1422static int
1423dsa_slave_switchdev_fdb_work_init(struct dsa_switchdev_event_work *
1424 switchdev_work,
1425 const struct switchdev_notifier_fdb_info *
1426 fdb_info)
1427{
1428 memcpy(&switchdev_work->fdb_info, fdb_info,
1429 sizeof(switchdev_work->fdb_info));
1430 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
1431 if (!switchdev_work->fdb_info.addr)
1432 return -ENOMEM;
1433 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
1434 fdb_info->addr);
1435 return 0;
1436}
1437
1438/* Called under rcu_read_lock() */
1439static int dsa_slave_switchdev_event(struct notifier_block *unused,
1440 unsigned long event, void *ptr)
1441{
1442 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
1443 struct dsa_switchdev_event_work *switchdev_work;
1444
1445 if (!dsa_slave_dev_check(dev))
1446 return NOTIFY_DONE;
1447
1448 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
1449 if (!switchdev_work)
1450 return NOTIFY_BAD;
1451
1452 INIT_WORK(&switchdev_work->work,
1453 dsa_slave_switchdev_event_work);
1454 switchdev_work->dev = dev;
1455 switchdev_work->event = event;
1456
1457 switch (event) {
1458 case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */
1459 case SWITCHDEV_FDB_DEL_TO_DEVICE:
1460 if (dsa_slave_switchdev_fdb_work_init(switchdev_work,
1461 ptr))
1462 goto err_fdb_work_init;
1463 dev_hold(dev);
1464 break;
1465 default:
1466 kfree(switchdev_work);
1467 return NOTIFY_DONE;
1468 }
1469
1470 dsa_schedule_work(&switchdev_work->work);
1471 return NOTIFY_OK;
1472
1473err_fdb_work_init:
1474 kfree(switchdev_work);
1475 return NOTIFY_BAD;
1476}
1477
1478static struct notifier_block dsa_slave_nb __read_mostly = {
1479 .notifier_call = dsa_slave_netdevice_event,
1480};
1481
1482static struct notifier_block dsa_slave_switchdev_notifier = {
1483 .notifier_call = dsa_slave_switchdev_event,
1484};
1485
1486int dsa_slave_register_notifier(void)
1487{
1488 int err;
1489
1490 err = register_netdevice_notifier(&dsa_slave_nb);
1491 if (err)
1492 return err;
1493
1494 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
1495 if (err)
1496 goto err_switchdev_nb;
1497
1498 return 0;
1499
1500err_switchdev_nb:
1501 unregister_netdevice_notifier(&dsa_slave_nb);
1502 return err;
1503}
1504
1505void dsa_slave_unregister_notifier(void)
1506{
1507 int err;
1508
1509 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
1510 if (err)
1511 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
1512
1513 err = unregister_netdevice_notifier(&dsa_slave_nb);
1514 if (err)
1515 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
1516}
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 ***************************************************/
26static 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
36static 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
46void dsa_slave_mii_bus_init(struct dsa_switch *ds)
47{
48 ds->slave_mii_bus->priv = (void *)ds;
49 ds->slave_mii_bus->name = "dsa slave smi";
50 ds->slave_mii_bus->read = dsa_slave_phy_read;
51 ds->slave_mii_bus->write = dsa_slave_phy_write;
52 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x",
53 ds->index, ds->pd->sw_addr);
54 ds->slave_mii_bus->parent = ds->master_dev;
55 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
56}
57
58
59/* slave device handling ****************************************************/
60static 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
67static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p)
68{
69 return !!p->bridge_dev;
70}
71
72static 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
115clear_promisc:
116 if (dev->flags & IFF_PROMISC)
117 dev_set_promiscuity(master, -1);
118clear_allmulti:
119 if (dev->flags & IFF_ALLMULTI)
120 dev_set_allmulti(master, -1);
121del_unicast:
122 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
123 dev_uc_del(master, dev->dev_addr);
124out:
125 return err;
126}
127
128static 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
156static 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
167static 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
176static 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
198out:
199 ether_addr_copy(dev->dev_addr, addr->sa_data);
200
201 return 0;
202}
203
204static 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 int err;
211
212 if (switchdev_trans_ph_prepare(trans)) {
213 if (!ds->drv->port_vlan_prepare || !ds->drv->port_vlan_add)
214 return -EOPNOTSUPP;
215
216 err = ds->drv->port_vlan_prepare(ds, p->port, vlan, trans);
217 if (err)
218 return err;
219 } else {
220 err = ds->drv->port_vlan_add(ds, p->port, vlan, trans);
221 if (err)
222 return err;
223 }
224
225 return 0;
226}
227
228static int dsa_slave_port_vlan_del(struct net_device *dev,
229 const struct switchdev_obj_port_vlan *vlan)
230{
231 struct dsa_slave_priv *p = netdev_priv(dev);
232 struct dsa_switch *ds = p->parent;
233
234 if (!ds->drv->port_vlan_del)
235 return -EOPNOTSUPP;
236
237 return ds->drv->port_vlan_del(ds, p->port, vlan);
238}
239
240static int dsa_slave_port_vlan_dump(struct net_device *dev,
241 struct switchdev_obj_port_vlan *vlan,
242 switchdev_obj_dump_cb_t *cb)
243{
244 struct dsa_slave_priv *p = netdev_priv(dev);
245 struct dsa_switch *ds = p->parent;
246
247 if (ds->drv->port_vlan_dump)
248 return ds->drv->port_vlan_dump(ds, p->port, vlan, cb);
249
250 return -EOPNOTSUPP;
251}
252
253static int dsa_slave_port_fdb_add(struct net_device *dev,
254 const struct switchdev_obj_port_fdb *fdb,
255 struct switchdev_trans *trans)
256{
257 struct dsa_slave_priv *p = netdev_priv(dev);
258 struct dsa_switch *ds = p->parent;
259 int ret;
260
261 if (!ds->drv->port_fdb_prepare || !ds->drv->port_fdb_add)
262 return -EOPNOTSUPP;
263
264 if (switchdev_trans_ph_prepare(trans))
265 ret = ds->drv->port_fdb_prepare(ds, p->port, fdb, trans);
266 else
267 ret = ds->drv->port_fdb_add(ds, p->port, fdb, trans);
268
269 return ret;
270}
271
272static int dsa_slave_port_fdb_del(struct net_device *dev,
273 const struct switchdev_obj_port_fdb *fdb)
274{
275 struct dsa_slave_priv *p = netdev_priv(dev);
276 struct dsa_switch *ds = p->parent;
277 int ret = -EOPNOTSUPP;
278
279 if (ds->drv->port_fdb_del)
280 ret = ds->drv->port_fdb_del(ds, p->port, fdb);
281
282 return ret;
283}
284
285static int dsa_slave_port_fdb_dump(struct net_device *dev,
286 struct switchdev_obj_port_fdb *fdb,
287 switchdev_obj_dump_cb_t *cb)
288{
289 struct dsa_slave_priv *p = netdev_priv(dev);
290 struct dsa_switch *ds = p->parent;
291
292 if (ds->drv->port_fdb_dump)
293 return ds->drv->port_fdb_dump(ds, p->port, fdb, cb);
294
295 return -EOPNOTSUPP;
296}
297
298static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
299{
300 struct dsa_slave_priv *p = netdev_priv(dev);
301
302 if (p->phy != NULL)
303 return phy_mii_ioctl(p->phy, ifr, cmd);
304
305 return -EOPNOTSUPP;
306}
307
308static int dsa_slave_stp_update(struct net_device *dev, u8 state)
309{
310 struct dsa_slave_priv *p = netdev_priv(dev);
311 struct dsa_switch *ds = p->parent;
312 int ret = -EOPNOTSUPP;
313
314 if (ds->drv->port_stp_update)
315 ret = ds->drv->port_stp_update(ds, p->port, state);
316
317 return ret;
318}
319
320static int dsa_slave_vlan_filtering(struct net_device *dev,
321 const struct switchdev_attr *attr,
322 struct switchdev_trans *trans)
323{
324 struct dsa_slave_priv *p = netdev_priv(dev);
325 struct dsa_switch *ds = p->parent;
326
327 /* bridge skips -EOPNOTSUPP, so skip the prepare phase */
328 if (switchdev_trans_ph_prepare(trans))
329 return 0;
330
331 if (ds->drv->port_vlan_filtering)
332 return ds->drv->port_vlan_filtering(ds, p->port,
333 attr->u.vlan_filtering);
334
335 return 0;
336}
337
338static int dsa_slave_port_attr_set(struct net_device *dev,
339 const struct switchdev_attr *attr,
340 struct switchdev_trans *trans)
341{
342 struct dsa_slave_priv *p = netdev_priv(dev);
343 struct dsa_switch *ds = p->parent;
344 int ret;
345
346 switch (attr->id) {
347 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
348 if (switchdev_trans_ph_prepare(trans))
349 ret = ds->drv->port_stp_update ? 0 : -EOPNOTSUPP;
350 else
351 ret = ds->drv->port_stp_update(ds, p->port,
352 attr->u.stp_state);
353 break;
354 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
355 ret = dsa_slave_vlan_filtering(dev, attr, trans);
356 break;
357 default:
358 ret = -EOPNOTSUPP;
359 break;
360 }
361
362 return ret;
363}
364
365static int dsa_slave_port_obj_add(struct net_device *dev,
366 const struct switchdev_obj *obj,
367 struct switchdev_trans *trans)
368{
369 int err;
370
371 /* For the prepare phase, ensure the full set of changes is feasable in
372 * one go in order to signal a failure properly. If an operation is not
373 * supported, return -EOPNOTSUPP.
374 */
375
376 switch (obj->id) {
377 case SWITCHDEV_OBJ_ID_PORT_FDB:
378 err = dsa_slave_port_fdb_add(dev,
379 SWITCHDEV_OBJ_PORT_FDB(obj),
380 trans);
381 break;
382 case SWITCHDEV_OBJ_ID_PORT_VLAN:
383 err = dsa_slave_port_vlan_add(dev,
384 SWITCHDEV_OBJ_PORT_VLAN(obj),
385 trans);
386 break;
387 default:
388 err = -EOPNOTSUPP;
389 break;
390 }
391
392 return err;
393}
394
395static int dsa_slave_port_obj_del(struct net_device *dev,
396 const struct switchdev_obj *obj)
397{
398 int err;
399
400 switch (obj->id) {
401 case SWITCHDEV_OBJ_ID_PORT_FDB:
402 err = dsa_slave_port_fdb_del(dev,
403 SWITCHDEV_OBJ_PORT_FDB(obj));
404 break;
405 case SWITCHDEV_OBJ_ID_PORT_VLAN:
406 err = dsa_slave_port_vlan_del(dev,
407 SWITCHDEV_OBJ_PORT_VLAN(obj));
408 break;
409 default:
410 err = -EOPNOTSUPP;
411 break;
412 }
413
414 return err;
415}
416
417static int dsa_slave_port_obj_dump(struct net_device *dev,
418 struct switchdev_obj *obj,
419 switchdev_obj_dump_cb_t *cb)
420{
421 int err;
422
423 switch (obj->id) {
424 case SWITCHDEV_OBJ_ID_PORT_FDB:
425 err = dsa_slave_port_fdb_dump(dev,
426 SWITCHDEV_OBJ_PORT_FDB(obj),
427 cb);
428 break;
429 case SWITCHDEV_OBJ_ID_PORT_VLAN:
430 err = dsa_slave_port_vlan_dump(dev,
431 SWITCHDEV_OBJ_PORT_VLAN(obj),
432 cb);
433 break;
434 default:
435 err = -EOPNOTSUPP;
436 break;
437 }
438
439 return err;
440}
441
442static int dsa_slave_bridge_port_join(struct net_device *dev,
443 struct net_device *br)
444{
445 struct dsa_slave_priv *p = netdev_priv(dev);
446 struct dsa_switch *ds = p->parent;
447 int ret = -EOPNOTSUPP;
448
449 p->bridge_dev = br;
450
451 if (ds->drv->port_bridge_join)
452 ret = ds->drv->port_bridge_join(ds, p->port, br);
453
454 return ret == -EOPNOTSUPP ? 0 : ret;
455}
456
457static void dsa_slave_bridge_port_leave(struct net_device *dev)
458{
459 struct dsa_slave_priv *p = netdev_priv(dev);
460 struct dsa_switch *ds = p->parent;
461
462
463 if (ds->drv->port_bridge_leave)
464 ds->drv->port_bridge_leave(ds, p->port);
465
466 p->bridge_dev = NULL;
467
468 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
469 * so allow it to be in BR_STATE_FORWARDING to be kept functional
470 */
471 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
472}
473
474static int dsa_slave_port_attr_get(struct net_device *dev,
475 struct switchdev_attr *attr)
476{
477 struct dsa_slave_priv *p = netdev_priv(dev);
478 struct dsa_switch *ds = p->parent;
479
480 switch (attr->id) {
481 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
482 attr->u.ppid.id_len = sizeof(ds->index);
483 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
484 break;
485 default:
486 return -EOPNOTSUPP;
487 }
488
489 return 0;
490}
491
492static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
493 struct sk_buff *skb)
494{
495#ifdef CONFIG_NET_POLL_CONTROLLER
496 if (p->netpoll)
497 netpoll_send_skb(p->netpoll, skb);
498#else
499 BUG();
500#endif
501 return NETDEV_TX_OK;
502}
503
504static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
505{
506 struct dsa_slave_priv *p = netdev_priv(dev);
507 struct sk_buff *nskb;
508
509 dev->stats.tx_packets++;
510 dev->stats.tx_bytes += skb->len;
511
512 /* Transmit function may have to reallocate the original SKB */
513 nskb = p->xmit(skb, dev);
514 if (!nskb)
515 return NETDEV_TX_OK;
516
517 /* SKB for netpoll still need to be mangled with the protocol-specific
518 * tag to be successfully transmitted
519 */
520 if (unlikely(netpoll_tx_running(dev)))
521 return dsa_netpoll_send_skb(p, nskb);
522
523 /* Queue the SKB for transmission on the parent interface, but
524 * do not modify its EtherType
525 */
526 nskb->dev = p->parent->dst->master_netdev;
527 dev_queue_xmit(nskb);
528
529 return NETDEV_TX_OK;
530}
531
532static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
533 struct net_device *dev)
534{
535 /* Just return the original SKB */
536 return skb;
537}
538
539
540/* ethtool operations *******************************************************/
541static int
542dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
543{
544 struct dsa_slave_priv *p = netdev_priv(dev);
545 int err;
546
547 err = -EOPNOTSUPP;
548 if (p->phy != NULL) {
549 err = phy_read_status(p->phy);
550 if (err == 0)
551 err = phy_ethtool_gset(p->phy, cmd);
552 }
553
554 return err;
555}
556
557static int
558dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
559{
560 struct dsa_slave_priv *p = netdev_priv(dev);
561
562 if (p->phy != NULL)
563 return phy_ethtool_sset(p->phy, cmd);
564
565 return -EOPNOTSUPP;
566}
567
568static void dsa_slave_get_drvinfo(struct net_device *dev,
569 struct ethtool_drvinfo *drvinfo)
570{
571 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
572 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
573 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
574 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
575}
576
577static int dsa_slave_get_regs_len(struct net_device *dev)
578{
579 struct dsa_slave_priv *p = netdev_priv(dev);
580 struct dsa_switch *ds = p->parent;
581
582 if (ds->drv->get_regs_len)
583 return ds->drv->get_regs_len(ds, p->port);
584
585 return -EOPNOTSUPP;
586}
587
588static void
589dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
590{
591 struct dsa_slave_priv *p = netdev_priv(dev);
592 struct dsa_switch *ds = p->parent;
593
594 if (ds->drv->get_regs)
595 ds->drv->get_regs(ds, p->port, regs, _p);
596}
597
598static int dsa_slave_nway_reset(struct net_device *dev)
599{
600 struct dsa_slave_priv *p = netdev_priv(dev);
601
602 if (p->phy != NULL)
603 return genphy_restart_aneg(p->phy);
604
605 return -EOPNOTSUPP;
606}
607
608static u32 dsa_slave_get_link(struct net_device *dev)
609{
610 struct dsa_slave_priv *p = netdev_priv(dev);
611
612 if (p->phy != NULL) {
613 genphy_update_link(p->phy);
614 return p->phy->link;
615 }
616
617 return -EOPNOTSUPP;
618}
619
620static int dsa_slave_get_eeprom_len(struct net_device *dev)
621{
622 struct dsa_slave_priv *p = netdev_priv(dev);
623 struct dsa_switch *ds = p->parent;
624
625 if (ds->pd->eeprom_len)
626 return ds->pd->eeprom_len;
627
628 if (ds->drv->get_eeprom_len)
629 return ds->drv->get_eeprom_len(ds);
630
631 return 0;
632}
633
634static int dsa_slave_get_eeprom(struct net_device *dev,
635 struct ethtool_eeprom *eeprom, u8 *data)
636{
637 struct dsa_slave_priv *p = netdev_priv(dev);
638 struct dsa_switch *ds = p->parent;
639
640 if (ds->drv->get_eeprom)
641 return ds->drv->get_eeprom(ds, eeprom, data);
642
643 return -EOPNOTSUPP;
644}
645
646static int dsa_slave_set_eeprom(struct net_device *dev,
647 struct ethtool_eeprom *eeprom, u8 *data)
648{
649 struct dsa_slave_priv *p = netdev_priv(dev);
650 struct dsa_switch *ds = p->parent;
651
652 if (ds->drv->set_eeprom)
653 return ds->drv->set_eeprom(ds, eeprom, data);
654
655 return -EOPNOTSUPP;
656}
657
658static void dsa_slave_get_strings(struct net_device *dev,
659 uint32_t stringset, uint8_t *data)
660{
661 struct dsa_slave_priv *p = netdev_priv(dev);
662 struct dsa_switch *ds = p->parent;
663
664 if (stringset == ETH_SS_STATS) {
665 int len = ETH_GSTRING_LEN;
666
667 strncpy(data, "tx_packets", len);
668 strncpy(data + len, "tx_bytes", len);
669 strncpy(data + 2 * len, "rx_packets", len);
670 strncpy(data + 3 * len, "rx_bytes", len);
671 if (ds->drv->get_strings != NULL)
672 ds->drv->get_strings(ds, p->port, data + 4 * len);
673 }
674}
675
676static void dsa_slave_get_ethtool_stats(struct net_device *dev,
677 struct ethtool_stats *stats,
678 uint64_t *data)
679{
680 struct dsa_slave_priv *p = netdev_priv(dev);
681 struct dsa_switch *ds = p->parent;
682
683 data[0] = p->dev->stats.tx_packets;
684 data[1] = p->dev->stats.tx_bytes;
685 data[2] = p->dev->stats.rx_packets;
686 data[3] = p->dev->stats.rx_bytes;
687 if (ds->drv->get_ethtool_stats != NULL)
688 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
689}
690
691static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
692{
693 struct dsa_slave_priv *p = netdev_priv(dev);
694 struct dsa_switch *ds = p->parent;
695
696 if (sset == ETH_SS_STATS) {
697 int count;
698
699 count = 4;
700 if (ds->drv->get_sset_count != NULL)
701 count += ds->drv->get_sset_count(ds);
702
703 return count;
704 }
705
706 return -EOPNOTSUPP;
707}
708
709static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
710{
711 struct dsa_slave_priv *p = netdev_priv(dev);
712 struct dsa_switch *ds = p->parent;
713
714 if (ds->drv->get_wol)
715 ds->drv->get_wol(ds, p->port, w);
716}
717
718static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
719{
720 struct dsa_slave_priv *p = netdev_priv(dev);
721 struct dsa_switch *ds = p->parent;
722 int ret = -EOPNOTSUPP;
723
724 if (ds->drv->set_wol)
725 ret = ds->drv->set_wol(ds, p->port, w);
726
727 return ret;
728}
729
730static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
731{
732 struct dsa_slave_priv *p = netdev_priv(dev);
733 struct dsa_switch *ds = p->parent;
734 int ret;
735
736 if (!ds->drv->set_eee)
737 return -EOPNOTSUPP;
738
739 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
740 if (ret)
741 return ret;
742
743 if (p->phy)
744 ret = phy_ethtool_set_eee(p->phy, e);
745
746 return ret;
747}
748
749static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
750{
751 struct dsa_slave_priv *p = netdev_priv(dev);
752 struct dsa_switch *ds = p->parent;
753 int ret;
754
755 if (!ds->drv->get_eee)
756 return -EOPNOTSUPP;
757
758 ret = ds->drv->get_eee(ds, p->port, e);
759 if (ret)
760 return ret;
761
762 if (p->phy)
763 ret = phy_ethtool_get_eee(p->phy, e);
764
765 return ret;
766}
767
768#ifdef CONFIG_NET_POLL_CONTROLLER
769static int dsa_slave_netpoll_setup(struct net_device *dev,
770 struct netpoll_info *ni)
771{
772 struct dsa_slave_priv *p = netdev_priv(dev);
773 struct dsa_switch *ds = p->parent;
774 struct net_device *master = ds->dst->master_netdev;
775 struct netpoll *netpoll;
776 int err = 0;
777
778 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
779 if (!netpoll)
780 return -ENOMEM;
781
782 err = __netpoll_setup(netpoll, master);
783 if (err) {
784 kfree(netpoll);
785 goto out;
786 }
787
788 p->netpoll = netpoll;
789out:
790 return err;
791}
792
793static void dsa_slave_netpoll_cleanup(struct net_device *dev)
794{
795 struct dsa_slave_priv *p = netdev_priv(dev);
796 struct netpoll *netpoll = p->netpoll;
797
798 if (!netpoll)
799 return;
800
801 p->netpoll = NULL;
802
803 __netpoll_free_async(netpoll);
804}
805
806static void dsa_slave_poll_controller(struct net_device *dev)
807{
808}
809#endif
810
811static const struct ethtool_ops dsa_slave_ethtool_ops = {
812 .get_settings = dsa_slave_get_settings,
813 .set_settings = dsa_slave_set_settings,
814 .get_drvinfo = dsa_slave_get_drvinfo,
815 .get_regs_len = dsa_slave_get_regs_len,
816 .get_regs = dsa_slave_get_regs,
817 .nway_reset = dsa_slave_nway_reset,
818 .get_link = dsa_slave_get_link,
819 .get_eeprom_len = dsa_slave_get_eeprom_len,
820 .get_eeprom = dsa_slave_get_eeprom,
821 .set_eeprom = dsa_slave_set_eeprom,
822 .get_strings = dsa_slave_get_strings,
823 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
824 .get_sset_count = dsa_slave_get_sset_count,
825 .set_wol = dsa_slave_set_wol,
826 .get_wol = dsa_slave_get_wol,
827 .set_eee = dsa_slave_set_eee,
828 .get_eee = dsa_slave_get_eee,
829};
830
831static const struct net_device_ops dsa_slave_netdev_ops = {
832 .ndo_open = dsa_slave_open,
833 .ndo_stop = dsa_slave_close,
834 .ndo_start_xmit = dsa_slave_xmit,
835 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
836 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
837 .ndo_set_mac_address = dsa_slave_set_mac_address,
838 .ndo_fdb_add = switchdev_port_fdb_add,
839 .ndo_fdb_del = switchdev_port_fdb_del,
840 .ndo_fdb_dump = switchdev_port_fdb_dump,
841 .ndo_do_ioctl = dsa_slave_ioctl,
842 .ndo_get_iflink = dsa_slave_get_iflink,
843#ifdef CONFIG_NET_POLL_CONTROLLER
844 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
845 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
846 .ndo_poll_controller = dsa_slave_poll_controller,
847#endif
848 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
849 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
850 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
851};
852
853static const struct switchdev_ops dsa_slave_switchdev_ops = {
854 .switchdev_port_attr_get = dsa_slave_port_attr_get,
855 .switchdev_port_attr_set = dsa_slave_port_attr_set,
856 .switchdev_port_obj_add = dsa_slave_port_obj_add,
857 .switchdev_port_obj_del = dsa_slave_port_obj_del,
858 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
859};
860
861static struct device_type dsa_type = {
862 .name = "dsa",
863};
864
865static void dsa_slave_adjust_link(struct net_device *dev)
866{
867 struct dsa_slave_priv *p = netdev_priv(dev);
868 struct dsa_switch *ds = p->parent;
869 unsigned int status_changed = 0;
870
871 if (p->old_link != p->phy->link) {
872 status_changed = 1;
873 p->old_link = p->phy->link;
874 }
875
876 if (p->old_duplex != p->phy->duplex) {
877 status_changed = 1;
878 p->old_duplex = p->phy->duplex;
879 }
880
881 if (p->old_pause != p->phy->pause) {
882 status_changed = 1;
883 p->old_pause = p->phy->pause;
884 }
885
886 if (ds->drv->adjust_link && status_changed)
887 ds->drv->adjust_link(ds, p->port, p->phy);
888
889 if (status_changed)
890 phy_print_status(p->phy);
891}
892
893static int dsa_slave_fixed_link_update(struct net_device *dev,
894 struct fixed_phy_status *status)
895{
896 struct dsa_slave_priv *p;
897 struct dsa_switch *ds;
898
899 if (dev) {
900 p = netdev_priv(dev);
901 ds = p->parent;
902 if (ds->drv->fixed_link_update)
903 ds->drv->fixed_link_update(ds, p->port, status);
904 }
905
906 return 0;
907}
908
909/* slave device setup *******************************************************/
910static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
911 struct net_device *slave_dev,
912 int addr)
913{
914 struct dsa_switch *ds = p->parent;
915
916 p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr);
917 if (!p->phy) {
918 netdev_err(slave_dev, "no phy at %d\n", addr);
919 return -ENODEV;
920 }
921
922 /* Use already configured phy mode */
923 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
924 p->phy_interface = p->phy->interface;
925 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
926 p->phy_interface);
927
928 return 0;
929}
930
931static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
932 struct net_device *slave_dev)
933{
934 struct dsa_switch *ds = p->parent;
935 struct dsa_chip_data *cd = ds->pd;
936 struct device_node *phy_dn, *port_dn;
937 bool phy_is_fixed = false;
938 u32 phy_flags = 0;
939 int mode, ret;
940
941 port_dn = cd->port_dn[p->port];
942 mode = of_get_phy_mode(port_dn);
943 if (mode < 0)
944 mode = PHY_INTERFACE_MODE_NA;
945 p->phy_interface = mode;
946
947 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
948 if (of_phy_is_fixed_link(port_dn)) {
949 /* In the case of a fixed PHY, the DT node associated
950 * to the fixed PHY is the Port DT node
951 */
952 ret = of_phy_register_fixed_link(port_dn);
953 if (ret) {
954 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
955 return ret;
956 }
957 phy_is_fixed = true;
958 phy_dn = port_dn;
959 }
960
961 if (ds->drv->get_phy_flags)
962 phy_flags = ds->drv->get_phy_flags(ds, p->port);
963
964 if (phy_dn) {
965 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
966
967 /* If this PHY address is part of phys_mii_mask, which means
968 * that we need to divert reads and writes to/from it, then we
969 * want to bind this device using the slave MII bus created by
970 * DSA to make that happen.
971 */
972 if (!phy_is_fixed && phy_id >= 0 &&
973 (ds->phys_mii_mask & (1 << phy_id))) {
974 ret = dsa_slave_phy_connect(p, slave_dev, phy_id);
975 if (ret) {
976 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret);
977 return ret;
978 }
979 } else {
980 p->phy = of_phy_connect(slave_dev, phy_dn,
981 dsa_slave_adjust_link,
982 phy_flags,
983 p->phy_interface);
984 }
985 }
986
987 if (p->phy && phy_is_fixed)
988 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
989
990 /* We could not connect to a designated PHY, so use the switch internal
991 * MDIO bus instead
992 */
993 if (!p->phy) {
994 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
995 if (ret) {
996 netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret);
997 return ret;
998 }
999 }
1000
1001 phy_attached_info(p->phy);
1002
1003 return 0;
1004}
1005
1006static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1007static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1008 struct netdev_queue *txq,
1009 void *_unused)
1010{
1011 lockdep_set_class(&txq->_xmit_lock,
1012 &dsa_slave_netdev_xmit_lock_key);
1013}
1014
1015int dsa_slave_suspend(struct net_device *slave_dev)
1016{
1017 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1018
1019 if (p->phy) {
1020 phy_stop(p->phy);
1021 p->old_pause = -1;
1022 p->old_link = -1;
1023 p->old_duplex = -1;
1024 phy_suspend(p->phy);
1025 }
1026
1027 return 0;
1028}
1029
1030int dsa_slave_resume(struct net_device *slave_dev)
1031{
1032 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1033
1034 netif_device_attach(slave_dev);
1035
1036 if (p->phy) {
1037 phy_resume(p->phy);
1038 phy_start(p->phy);
1039 }
1040
1041 return 0;
1042}
1043
1044int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1045 int port, char *name)
1046{
1047 struct net_device *master = ds->dst->master_netdev;
1048 struct net_device *slave_dev;
1049 struct dsa_slave_priv *p;
1050 int ret;
1051
1052 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1053 NET_NAME_UNKNOWN, ether_setup);
1054 if (slave_dev == NULL)
1055 return -ENOMEM;
1056
1057 slave_dev->features = master->vlan_features;
1058 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1059 eth_hw_addr_inherit(slave_dev, master);
1060 slave_dev->priv_flags |= IFF_NO_QUEUE;
1061 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1062 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1063 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1064
1065 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1066 NULL);
1067
1068 SET_NETDEV_DEV(slave_dev, parent);
1069 slave_dev->dev.of_node = ds->pd->port_dn[port];
1070 slave_dev->vlan_features = master->vlan_features;
1071
1072 p = netdev_priv(slave_dev);
1073 p->dev = slave_dev;
1074 p->parent = ds;
1075 p->port = port;
1076
1077 switch (ds->dst->tag_protocol) {
1078#ifdef CONFIG_NET_DSA_TAG_DSA
1079 case DSA_TAG_PROTO_DSA:
1080 p->xmit = dsa_netdev_ops.xmit;
1081 break;
1082#endif
1083#ifdef CONFIG_NET_DSA_TAG_EDSA
1084 case DSA_TAG_PROTO_EDSA:
1085 p->xmit = edsa_netdev_ops.xmit;
1086 break;
1087#endif
1088#ifdef CONFIG_NET_DSA_TAG_TRAILER
1089 case DSA_TAG_PROTO_TRAILER:
1090 p->xmit = trailer_netdev_ops.xmit;
1091 break;
1092#endif
1093#ifdef CONFIG_NET_DSA_TAG_BRCM
1094 case DSA_TAG_PROTO_BRCM:
1095 p->xmit = brcm_netdev_ops.xmit;
1096 break;
1097#endif
1098 default:
1099 p->xmit = dsa_slave_notag_xmit;
1100 break;
1101 }
1102
1103 p->old_pause = -1;
1104 p->old_link = -1;
1105 p->old_duplex = -1;
1106
1107 ds->ports[port] = slave_dev;
1108 ret = register_netdev(slave_dev);
1109 if (ret) {
1110 netdev_err(master, "error %d registering interface %s\n",
1111 ret, slave_dev->name);
1112 ds->ports[port] = NULL;
1113 free_netdev(slave_dev);
1114 return ret;
1115 }
1116
1117 netif_carrier_off(slave_dev);
1118
1119 ret = dsa_slave_phy_setup(p, slave_dev);
1120 if (ret) {
1121 netdev_err(master, "error %d setting up slave phy\n", ret);
1122 unregister_netdev(slave_dev);
1123 free_netdev(slave_dev);
1124 return ret;
1125 }
1126
1127 return 0;
1128}
1129
1130void dsa_slave_destroy(struct net_device *slave_dev)
1131{
1132 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1133
1134 netif_carrier_off(slave_dev);
1135 if (p->phy)
1136 phy_disconnect(p->phy);
1137 unregister_netdev(slave_dev);
1138 free_netdev(slave_dev);
1139}
1140
1141static bool dsa_slave_dev_check(struct net_device *dev)
1142{
1143 return dev->netdev_ops == &dsa_slave_netdev_ops;
1144}
1145
1146static int dsa_slave_port_upper_event(struct net_device *dev,
1147 unsigned long event, void *ptr)
1148{
1149 struct netdev_notifier_changeupper_info *info = ptr;
1150 struct net_device *upper = info->upper_dev;
1151 int err = 0;
1152
1153 switch (event) {
1154 case NETDEV_CHANGEUPPER:
1155 if (netif_is_bridge_master(upper)) {
1156 if (info->linking)
1157 err = dsa_slave_bridge_port_join(dev, upper);
1158 else
1159 dsa_slave_bridge_port_leave(dev);
1160 }
1161
1162 break;
1163 }
1164
1165 return notifier_from_errno(err);
1166}
1167
1168static int dsa_slave_port_event(struct net_device *dev, unsigned long event,
1169 void *ptr)
1170{
1171 switch (event) {
1172 case NETDEV_CHANGEUPPER:
1173 return dsa_slave_port_upper_event(dev, event, ptr);
1174 }
1175
1176 return NOTIFY_DONE;
1177}
1178
1179int dsa_slave_netdevice_event(struct notifier_block *unused,
1180 unsigned long event, void *ptr)
1181{
1182 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1183
1184 if (dsa_slave_dev_check(dev))
1185 return dsa_slave_port_event(dev, event, ptr);
1186
1187 return NOTIFY_DONE;
1188}