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flow_dissector: remove unused functions
[linux-2.6-block.git] / net / dsa / slave.c
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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 <linux/list.h>
20#include <net/rtnetlink.h>
21#include <net/pkt_cls.h>
22#include <net/tc_act/tc_mirred.h>
23#include <linux/if_bridge.h>
24#include <linux/netpoll.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->tree, 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 struct dsa_slave_priv *p = netdev_priv(dev);
68
69 return dsa_master_netdev(p)->ifindex;
70}
71
72static int dsa_slave_open(struct net_device *dev)
73{
74 struct dsa_slave_priv *p = netdev_priv(dev);
75 struct dsa_port *dp = p->dp;
76 struct dsa_switch *ds = dp->ds;
77 struct net_device *master = dsa_master_netdev(p);
78 u8 stp_state = dp->bridge_dev ? 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->ops->port_enable) {
102 err = ds->ops->port_enable(ds, p->dp->index, p->phy);
103 if (err)
104 goto clear_promisc;
105 }
106
107 dsa_port_set_state_now(p->dp, stp_state);
108
109 if (p->phy)
110 phy_start(p->phy);
111
112 return 0;
113
114clear_promisc:
115 if (dev->flags & IFF_PROMISC)
116 dev_set_promiscuity(master, -1);
117clear_allmulti:
118 if (dev->flags & IFF_ALLMULTI)
119 dev_set_allmulti(master, -1);
120del_unicast:
121 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
122 dev_uc_del(master, dev->dev_addr);
123out:
124 return err;
125}
126
127static int dsa_slave_close(struct net_device *dev)
128{
129 struct dsa_slave_priv *p = netdev_priv(dev);
130 struct net_device *master = dsa_master_netdev(p);
131 struct dsa_switch *ds = p->dp->ds;
132
133 if (p->phy)
134 phy_stop(p->phy);
135
136 dev_mc_unsync(master, dev);
137 dev_uc_unsync(master, dev);
138 if (dev->flags & IFF_ALLMULTI)
139 dev_set_allmulti(master, -1);
140 if (dev->flags & IFF_PROMISC)
141 dev_set_promiscuity(master, -1);
142
143 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
144 dev_uc_del(master, dev->dev_addr);
145
146 if (ds->ops->port_disable)
147 ds->ops->port_disable(ds, p->dp->index, p->phy);
148
149 dsa_port_set_state_now(p->dp, BR_STATE_DISABLED);
150
151 return 0;
152}
153
154static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
155{
156 struct dsa_slave_priv *p = netdev_priv(dev);
157 struct net_device *master = dsa_master_netdev(p);
158
159 if (change & IFF_ALLMULTI)
160 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
161 if (change & IFF_PROMISC)
162 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
163}
164
165static void dsa_slave_set_rx_mode(struct net_device *dev)
166{
167 struct dsa_slave_priv *p = netdev_priv(dev);
168 struct net_device *master = dsa_master_netdev(p);
169
170 dev_mc_sync(master, dev);
171 dev_uc_sync(master, dev);
172}
173
174static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
175{
176 struct dsa_slave_priv *p = netdev_priv(dev);
177 struct net_device *master = dsa_master_netdev(p);
178 struct sockaddr *addr = a;
179 int err;
180
181 if (!is_valid_ether_addr(addr->sa_data))
182 return -EADDRNOTAVAIL;
183
184 if (!(dev->flags & IFF_UP))
185 goto out;
186
187 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
188 err = dev_uc_add(master, addr->sa_data);
189 if (err < 0)
190 return err;
191 }
192
193 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
194 dev_uc_del(master, dev->dev_addr);
195
196out:
197 ether_addr_copy(dev->dev_addr, addr->sa_data);
198
199 return 0;
200}
201
202static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
203{
204 struct dsa_slave_priv *p = netdev_priv(dev);
205
206 if (p->phy != NULL)
207 return phy_mii_ioctl(p->phy, ifr, cmd);
208
209 return -EOPNOTSUPP;
210}
211
212static int dsa_slave_port_attr_set(struct net_device *dev,
213 const struct switchdev_attr *attr,
214 struct switchdev_trans *trans)
215{
216 struct dsa_slave_priv *p = netdev_priv(dev);
217 struct dsa_port *dp = p->dp;
218 int ret;
219
220 switch (attr->id) {
221 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
222 ret = dsa_port_set_state(dp, attr->u.stp_state, trans);
223 break;
224 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
225 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
226 trans);
227 break;
228 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
229 ret = dsa_port_ageing_time(dp, attr->u.ageing_time, trans);
230 break;
231 default:
232 ret = -EOPNOTSUPP;
233 break;
234 }
235
236 return ret;
237}
238
239static int dsa_slave_port_obj_add(struct net_device *dev,
240 const struct switchdev_obj *obj,
241 struct switchdev_trans *trans)
242{
243 struct dsa_slave_priv *p = netdev_priv(dev);
244 struct dsa_port *dp = p->dp;
245 int err;
246
247 /* For the prepare phase, ensure the full set of changes is feasable in
248 * one go in order to signal a failure properly. If an operation is not
249 * supported, return -EOPNOTSUPP.
250 */
251
252 switch (obj->id) {
253 case SWITCHDEV_OBJ_ID_PORT_FDB:
254 err = dsa_port_fdb_add(dp, SWITCHDEV_OBJ_PORT_FDB(obj), trans);
255 break;
256 case SWITCHDEV_OBJ_ID_PORT_MDB:
257 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans);
258 break;
259 case SWITCHDEV_OBJ_ID_PORT_VLAN:
260 err = dsa_port_vlan_add(dp, SWITCHDEV_OBJ_PORT_VLAN(obj),
261 trans);
262 break;
263 default:
264 err = -EOPNOTSUPP;
265 break;
266 }
267
268 return err;
269}
270
271static int dsa_slave_port_obj_del(struct net_device *dev,
272 const struct switchdev_obj *obj)
273{
274 struct dsa_slave_priv *p = netdev_priv(dev);
275 struct dsa_port *dp = p->dp;
276 int err;
277
278 switch (obj->id) {
279 case SWITCHDEV_OBJ_ID_PORT_FDB:
280 err = dsa_port_fdb_del(dp, SWITCHDEV_OBJ_PORT_FDB(obj));
281 break;
282 case SWITCHDEV_OBJ_ID_PORT_MDB:
283 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
284 break;
285 case SWITCHDEV_OBJ_ID_PORT_VLAN:
286 err = dsa_port_vlan_del(dp, SWITCHDEV_OBJ_PORT_VLAN(obj));
287 break;
288 default:
289 err = -EOPNOTSUPP;
290 break;
291 }
292
293 return err;
294}
295
296static int dsa_slave_port_obj_dump(struct net_device *dev,
297 struct switchdev_obj *obj,
298 switchdev_obj_dump_cb_t *cb)
299{
300 struct dsa_slave_priv *p = netdev_priv(dev);
301 struct dsa_port *dp = p->dp;
302 int err;
303
304 switch (obj->id) {
305 case SWITCHDEV_OBJ_ID_PORT_FDB:
306 err = dsa_port_fdb_dump(dp, SWITCHDEV_OBJ_PORT_FDB(obj), cb);
307 break;
308 case SWITCHDEV_OBJ_ID_PORT_MDB:
309 err = dsa_port_mdb_dump(dp, SWITCHDEV_OBJ_PORT_MDB(obj), cb);
310 break;
311 case SWITCHDEV_OBJ_ID_PORT_VLAN:
312 err = dsa_port_vlan_dump(dp, SWITCHDEV_OBJ_PORT_VLAN(obj), cb);
313 break;
314 default:
315 err = -EOPNOTSUPP;
316 break;
317 }
318
319 return err;
320}
321
322static int dsa_slave_port_attr_get(struct net_device *dev,
323 struct switchdev_attr *attr)
324{
325 struct dsa_slave_priv *p = netdev_priv(dev);
326 struct dsa_switch *ds = p->dp->ds;
327
328 switch (attr->id) {
329 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
330 attr->u.ppid.id_len = sizeof(ds->index);
331 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
332 break;
333 default:
334 return -EOPNOTSUPP;
335 }
336
337 return 0;
338}
339
340static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
341 struct sk_buff *skb)
342{
343#ifdef CONFIG_NET_POLL_CONTROLLER
344 if (p->netpoll)
345 netpoll_send_skb(p->netpoll, skb);
346#else
347 BUG();
348#endif
349 return NETDEV_TX_OK;
350}
351
352static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
353{
354 struct dsa_slave_priv *p = netdev_priv(dev);
355 struct sk_buff *nskb;
356
357 dev->stats.tx_packets++;
358 dev->stats.tx_bytes += skb->len;
359
360 /* Transmit function may have to reallocate the original SKB,
361 * in which case it must have freed it. Only free it here on error.
362 */
363 nskb = p->xmit(skb, dev);
364 if (!nskb) {
365 kfree_skb(skb);
366 return NETDEV_TX_OK;
367 }
368
369 /* SKB for netpoll still need to be mangled with the protocol-specific
370 * tag to be successfully transmitted
371 */
372 if (unlikely(netpoll_tx_running(dev)))
373 return dsa_netpoll_send_skb(p, nskb);
374
375 /* Queue the SKB for transmission on the parent interface, but
376 * do not modify its EtherType
377 */
378 nskb->dev = dsa_master_netdev(p);
379 dev_queue_xmit(nskb);
380
381 return NETDEV_TX_OK;
382}
383
384/* ethtool operations *******************************************************/
385static int
386dsa_slave_get_link_ksettings(struct net_device *dev,
387 struct ethtool_link_ksettings *cmd)
388{
389 struct dsa_slave_priv *p = netdev_priv(dev);
390
391 if (!p->phy)
392 return -EOPNOTSUPP;
393
394 phy_ethtool_ksettings_get(p->phy, cmd);
395
396 return 0;
397}
398
399static int
400dsa_slave_set_link_ksettings(struct net_device *dev,
401 const struct ethtool_link_ksettings *cmd)
402{
403 struct dsa_slave_priv *p = netdev_priv(dev);
404
405 if (p->phy != NULL)
406 return phy_ethtool_ksettings_set(p->phy, cmd);
407
408 return -EOPNOTSUPP;
409}
410
411static void dsa_slave_get_drvinfo(struct net_device *dev,
412 struct ethtool_drvinfo *drvinfo)
413{
414 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
415 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
416 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
417}
418
419static int dsa_slave_get_regs_len(struct net_device *dev)
420{
421 struct dsa_slave_priv *p = netdev_priv(dev);
422 struct dsa_switch *ds = p->dp->ds;
423
424 if (ds->ops->get_regs_len)
425 return ds->ops->get_regs_len(ds, p->dp->index);
426
427 return -EOPNOTSUPP;
428}
429
430static void
431dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
432{
433 struct dsa_slave_priv *p = netdev_priv(dev);
434 struct dsa_switch *ds = p->dp->ds;
435
436 if (ds->ops->get_regs)
437 ds->ops->get_regs(ds, p->dp->index, regs, _p);
438}
439
440static int dsa_slave_nway_reset(struct net_device *dev)
441{
442 struct dsa_slave_priv *p = netdev_priv(dev);
443
444 if (p->phy != NULL)
445 return genphy_restart_aneg(p->phy);
446
447 return -EOPNOTSUPP;
448}
449
450static u32 dsa_slave_get_link(struct net_device *dev)
451{
452 struct dsa_slave_priv *p = netdev_priv(dev);
453
454 if (p->phy != NULL) {
455 genphy_update_link(p->phy);
456 return p->phy->link;
457 }
458
459 return -EOPNOTSUPP;
460}
461
462static int dsa_slave_get_eeprom_len(struct net_device *dev)
463{
464 struct dsa_slave_priv *p = netdev_priv(dev);
465 struct dsa_switch *ds = p->dp->ds;
466
467 if (ds->cd && ds->cd->eeprom_len)
468 return ds->cd->eeprom_len;
469
470 if (ds->ops->get_eeprom_len)
471 return ds->ops->get_eeprom_len(ds);
472
473 return 0;
474}
475
476static int dsa_slave_get_eeprom(struct net_device *dev,
477 struct ethtool_eeprom *eeprom, u8 *data)
478{
479 struct dsa_slave_priv *p = netdev_priv(dev);
480 struct dsa_switch *ds = p->dp->ds;
481
482 if (ds->ops->get_eeprom)
483 return ds->ops->get_eeprom(ds, eeprom, data);
484
485 return -EOPNOTSUPP;
486}
487
488static int dsa_slave_set_eeprom(struct net_device *dev,
489 struct ethtool_eeprom *eeprom, u8 *data)
490{
491 struct dsa_slave_priv *p = netdev_priv(dev);
492 struct dsa_switch *ds = p->dp->ds;
493
494 if (ds->ops->set_eeprom)
495 return ds->ops->set_eeprom(ds, eeprom, data);
496
497 return -EOPNOTSUPP;
498}
499
500static void dsa_slave_get_strings(struct net_device *dev,
501 uint32_t stringset, uint8_t *data)
502{
503 struct dsa_slave_priv *p = netdev_priv(dev);
504 struct dsa_switch *ds = p->dp->ds;
505
506 if (stringset == ETH_SS_STATS) {
507 int len = ETH_GSTRING_LEN;
508
509 strncpy(data, "tx_packets", len);
510 strncpy(data + len, "tx_bytes", len);
511 strncpy(data + 2 * len, "rx_packets", len);
512 strncpy(data + 3 * len, "rx_bytes", len);
513 if (ds->ops->get_strings)
514 ds->ops->get_strings(ds, p->dp->index, data + 4 * len);
515 }
516}
517
518static void dsa_cpu_port_get_ethtool_stats(struct net_device *dev,
519 struct ethtool_stats *stats,
520 uint64_t *data)
521{
522 struct dsa_switch_tree *dst = dev->dsa_ptr;
523 struct dsa_port *cpu_dp = dsa_get_cpu_port(dst);
524 struct dsa_switch *ds = cpu_dp->ds;
525 s8 cpu_port = cpu_dp->index;
526 int count = 0;
527
528 if (cpu_dp->ethtool_ops.get_sset_count) {
529 count = cpu_dp->ethtool_ops.get_sset_count(dev, ETH_SS_STATS);
530 cpu_dp->ethtool_ops.get_ethtool_stats(dev, stats, data);
531 }
532
533 if (ds->ops->get_ethtool_stats)
534 ds->ops->get_ethtool_stats(ds, cpu_port, data + count);
535}
536
537static int dsa_cpu_port_get_sset_count(struct net_device *dev, int sset)
538{
539 struct dsa_switch_tree *dst = dev->dsa_ptr;
540 struct dsa_port *cpu_dp = dsa_get_cpu_port(dst);
541 struct dsa_switch *ds = cpu_dp->ds;
542 int count = 0;
543
544 if (cpu_dp->ethtool_ops.get_sset_count)
545 count += cpu_dp->ethtool_ops.get_sset_count(dev, sset);
546
547 if (sset == ETH_SS_STATS && ds->ops->get_sset_count)
548 count += ds->ops->get_sset_count(ds);
549
550 return count;
551}
552
553static void dsa_cpu_port_get_strings(struct net_device *dev,
554 uint32_t stringset, uint8_t *data)
555{
556 struct dsa_switch_tree *dst = dev->dsa_ptr;
557 struct dsa_port *cpu_dp = dsa_get_cpu_port(dst);
558 struct dsa_switch *ds = cpu_dp->ds;
559 s8 cpu_port = cpu_dp->index;
560 int len = ETH_GSTRING_LEN;
561 int mcount = 0, count;
562 unsigned int i;
563 uint8_t pfx[4];
564 uint8_t *ndata;
565
566 snprintf(pfx, sizeof(pfx), "p%.2d", cpu_port);
567 /* We do not want to be NULL-terminated, since this is a prefix */
568 pfx[sizeof(pfx) - 1] = '_';
569
570 if (cpu_dp->ethtool_ops.get_sset_count) {
571 mcount = cpu_dp->ethtool_ops.get_sset_count(dev, ETH_SS_STATS);
572 cpu_dp->ethtool_ops.get_strings(dev, stringset, data);
573 }
574
575 if (stringset == ETH_SS_STATS && ds->ops->get_strings) {
576 ndata = data + mcount * len;
577 /* This function copies ETH_GSTRINGS_LEN bytes, we will mangle
578 * the output after to prepend our CPU port prefix we
579 * constructed earlier
580 */
581 ds->ops->get_strings(ds, cpu_port, ndata);
582 count = ds->ops->get_sset_count(ds);
583 for (i = 0; i < count; i++) {
584 memmove(ndata + (i * len + sizeof(pfx)),
585 ndata + i * len, len - sizeof(pfx));
586 memcpy(ndata + i * len, pfx, sizeof(pfx));
587 }
588 }
589}
590
591static void dsa_slave_get_ethtool_stats(struct net_device *dev,
592 struct ethtool_stats *stats,
593 uint64_t *data)
594{
595 struct dsa_slave_priv *p = netdev_priv(dev);
596 struct dsa_switch *ds = p->dp->ds;
597
598 data[0] = dev->stats.tx_packets;
599 data[1] = dev->stats.tx_bytes;
600 data[2] = dev->stats.rx_packets;
601 data[3] = dev->stats.rx_bytes;
602 if (ds->ops->get_ethtool_stats)
603 ds->ops->get_ethtool_stats(ds, p->dp->index, data + 4);
604}
605
606static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
607{
608 struct dsa_slave_priv *p = netdev_priv(dev);
609 struct dsa_switch *ds = p->dp->ds;
610
611 if (sset == ETH_SS_STATS) {
612 int count;
613
614 count = 4;
615 if (ds->ops->get_sset_count)
616 count += ds->ops->get_sset_count(ds);
617
618 return count;
619 }
620
621 return -EOPNOTSUPP;
622}
623
624static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
625{
626 struct dsa_slave_priv *p = netdev_priv(dev);
627 struct dsa_switch *ds = p->dp->ds;
628
629 if (ds->ops->get_wol)
630 ds->ops->get_wol(ds, p->dp->index, w);
631}
632
633static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
634{
635 struct dsa_slave_priv *p = netdev_priv(dev);
636 struct dsa_switch *ds = p->dp->ds;
637 int ret = -EOPNOTSUPP;
638
639 if (ds->ops->set_wol)
640 ret = ds->ops->set_wol(ds, p->dp->index, w);
641
642 return ret;
643}
644
645static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
646{
647 struct dsa_slave_priv *p = netdev_priv(dev);
648 struct dsa_switch *ds = p->dp->ds;
649 int ret;
650
651 /* Port's PHY and MAC both need to be EEE capable */
652 if (!p->phy)
653 return -ENODEV;
654
655 if (!ds->ops->set_mac_eee)
656 return -EOPNOTSUPP;
657
658 ret = ds->ops->set_mac_eee(ds, p->dp->index, e);
659 if (ret)
660 return ret;
661
662 if (e->eee_enabled) {
663 ret = phy_init_eee(p->phy, 0);
664 if (ret)
665 return ret;
666 }
667
668 return phy_ethtool_set_eee(p->phy, e);
669}
670
671static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
672{
673 struct dsa_slave_priv *p = netdev_priv(dev);
674 struct dsa_switch *ds = p->dp->ds;
675 int ret;
676
677 /* Port's PHY and MAC both need to be EEE capable */
678 if (!p->phy)
679 return -ENODEV;
680
681 if (!ds->ops->get_mac_eee)
682 return -EOPNOTSUPP;
683
684 ret = ds->ops->get_mac_eee(ds, p->dp->index, e);
685 if (ret)
686 return ret;
687
688 return phy_ethtool_get_eee(p->phy, e);
689}
690
691#ifdef CONFIG_NET_POLL_CONTROLLER
692static int dsa_slave_netpoll_setup(struct net_device *dev,
693 struct netpoll_info *ni)
694{
695 struct dsa_slave_priv *p = netdev_priv(dev);
696 struct net_device *master = dsa_master_netdev(p);
697 struct netpoll *netpoll;
698 int err = 0;
699
700 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
701 if (!netpoll)
702 return -ENOMEM;
703
704 err = __netpoll_setup(netpoll, master);
705 if (err) {
706 kfree(netpoll);
707 goto out;
708 }
709
710 p->netpoll = netpoll;
711out:
712 return err;
713}
714
715static void dsa_slave_netpoll_cleanup(struct net_device *dev)
716{
717 struct dsa_slave_priv *p = netdev_priv(dev);
718 struct netpoll *netpoll = p->netpoll;
719
720 if (!netpoll)
721 return;
722
723 p->netpoll = NULL;
724
725 __netpoll_free_async(netpoll);
726}
727
728static void dsa_slave_poll_controller(struct net_device *dev)
729{
730}
731#endif
732
733static int dsa_slave_get_phys_port_name(struct net_device *dev,
734 char *name, size_t len)
735{
736 struct dsa_slave_priv *p = netdev_priv(dev);
737
738 if (snprintf(name, len, "p%d", p->dp->index) >= len)
739 return -EINVAL;
740
741 return 0;
742}
743
744static struct dsa_mall_tc_entry *
745dsa_slave_mall_tc_entry_find(struct dsa_slave_priv *p,
746 unsigned long cookie)
747{
748 struct dsa_mall_tc_entry *mall_tc_entry;
749
750 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
751 if (mall_tc_entry->cookie == cookie)
752 return mall_tc_entry;
753
754 return NULL;
755}
756
757static int dsa_slave_add_cls_matchall(struct net_device *dev,
758 __be16 protocol,
759 struct tc_cls_matchall_offload *cls,
760 bool ingress)
761{
762 struct dsa_slave_priv *p = netdev_priv(dev);
763 struct dsa_mall_tc_entry *mall_tc_entry;
764 struct dsa_switch *ds = p->dp->ds;
765 struct net *net = dev_net(dev);
766 struct dsa_slave_priv *to_p;
767 struct net_device *to_dev;
768 const struct tc_action *a;
769 int err = -EOPNOTSUPP;
770 LIST_HEAD(actions);
771 int ifindex;
772
773 if (!ds->ops->port_mirror_add)
774 return err;
775
776 if (!tc_single_action(cls->exts))
777 return err;
778
779 tcf_exts_to_list(cls->exts, &actions);
780 a = list_first_entry(&actions, struct tc_action, list);
781
782 if (is_tcf_mirred_egress_mirror(a) && protocol == htons(ETH_P_ALL)) {
783 struct dsa_mall_mirror_tc_entry *mirror;
784
785 ifindex = tcf_mirred_ifindex(a);
786 to_dev = __dev_get_by_index(net, ifindex);
787 if (!to_dev)
788 return -EINVAL;
789
790 if (!dsa_slave_dev_check(to_dev))
791 return -EOPNOTSUPP;
792
793 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
794 if (!mall_tc_entry)
795 return -ENOMEM;
796
797 mall_tc_entry->cookie = cls->cookie;
798 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
799 mirror = &mall_tc_entry->mirror;
800
801 to_p = netdev_priv(to_dev);
802
803 mirror->to_local_port = to_p->dp->index;
804 mirror->ingress = ingress;
805
806 err = ds->ops->port_mirror_add(ds, p->dp->index, mirror,
807 ingress);
808 if (err) {
809 kfree(mall_tc_entry);
810 return err;
811 }
812
813 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
814 }
815
816 return 0;
817}
818
819static void dsa_slave_del_cls_matchall(struct net_device *dev,
820 struct tc_cls_matchall_offload *cls)
821{
822 struct dsa_slave_priv *p = netdev_priv(dev);
823 struct dsa_mall_tc_entry *mall_tc_entry;
824 struct dsa_switch *ds = p->dp->ds;
825
826 if (!ds->ops->port_mirror_del)
827 return;
828
829 mall_tc_entry = dsa_slave_mall_tc_entry_find(p, cls->cookie);
830 if (!mall_tc_entry)
831 return;
832
833 list_del(&mall_tc_entry->list);
834
835 switch (mall_tc_entry->type) {
836 case DSA_PORT_MALL_MIRROR:
837 ds->ops->port_mirror_del(ds, p->dp->index,
838 &mall_tc_entry->mirror);
839 break;
840 default:
841 WARN_ON(1);
842 }
843
844 kfree(mall_tc_entry);
845}
846
847static int dsa_slave_setup_tc(struct net_device *dev, u32 handle,
848 u32 chain_index, __be16 protocol,
849 struct tc_to_netdev *tc)
850{
851 bool ingress = TC_H_MAJ(handle) == TC_H_MAJ(TC_H_INGRESS);
852
853 if (chain_index)
854 return -EOPNOTSUPP;
855
856 switch (tc->type) {
857 case TC_SETUP_MATCHALL:
858 switch (tc->cls_mall->command) {
859 case TC_CLSMATCHALL_REPLACE:
860 return dsa_slave_add_cls_matchall(dev, protocol,
861 tc->cls_mall,
862 ingress);
863 case TC_CLSMATCHALL_DESTROY:
864 dsa_slave_del_cls_matchall(dev, tc->cls_mall);
865 return 0;
866 }
867 default:
868 return -EOPNOTSUPP;
869 }
870}
871
872void dsa_cpu_port_ethtool_init(struct ethtool_ops *ops)
873{
874 ops->get_sset_count = dsa_cpu_port_get_sset_count;
875 ops->get_ethtool_stats = dsa_cpu_port_get_ethtool_stats;
876 ops->get_strings = dsa_cpu_port_get_strings;
877}
878
879static int dsa_slave_get_rxnfc(struct net_device *dev,
880 struct ethtool_rxnfc *nfc, u32 *rule_locs)
881{
882 struct dsa_slave_priv *p = netdev_priv(dev);
883 struct dsa_switch *ds = p->dp->ds;
884
885 if (!ds->ops->get_rxnfc)
886 return -EOPNOTSUPP;
887
888 return ds->ops->get_rxnfc(ds, p->dp->index, nfc, rule_locs);
889}
890
891static int dsa_slave_set_rxnfc(struct net_device *dev,
892 struct ethtool_rxnfc *nfc)
893{
894 struct dsa_slave_priv *p = netdev_priv(dev);
895 struct dsa_switch *ds = p->dp->ds;
896
897 if (!ds->ops->set_rxnfc)
898 return -EOPNOTSUPP;
899
900 return ds->ops->set_rxnfc(ds, p->dp->index, nfc);
901}
902
903static const struct ethtool_ops dsa_slave_ethtool_ops = {
904 .get_drvinfo = dsa_slave_get_drvinfo,
905 .get_regs_len = dsa_slave_get_regs_len,
906 .get_regs = dsa_slave_get_regs,
907 .nway_reset = dsa_slave_nway_reset,
908 .get_link = dsa_slave_get_link,
909 .get_eeprom_len = dsa_slave_get_eeprom_len,
910 .get_eeprom = dsa_slave_get_eeprom,
911 .set_eeprom = dsa_slave_set_eeprom,
912 .get_strings = dsa_slave_get_strings,
913 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
914 .get_sset_count = dsa_slave_get_sset_count,
915 .set_wol = dsa_slave_set_wol,
916 .get_wol = dsa_slave_get_wol,
917 .set_eee = dsa_slave_set_eee,
918 .get_eee = dsa_slave_get_eee,
919 .get_link_ksettings = dsa_slave_get_link_ksettings,
920 .set_link_ksettings = dsa_slave_set_link_ksettings,
921 .get_rxnfc = dsa_slave_get_rxnfc,
922 .set_rxnfc = dsa_slave_set_rxnfc,
923};
924
925static const struct net_device_ops dsa_slave_netdev_ops = {
926 .ndo_open = dsa_slave_open,
927 .ndo_stop = dsa_slave_close,
928 .ndo_start_xmit = dsa_slave_xmit,
929 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
930 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
931 .ndo_set_mac_address = dsa_slave_set_mac_address,
932 .ndo_fdb_add = switchdev_port_fdb_add,
933 .ndo_fdb_del = switchdev_port_fdb_del,
934 .ndo_fdb_dump = switchdev_port_fdb_dump,
935 .ndo_do_ioctl = dsa_slave_ioctl,
936 .ndo_get_iflink = dsa_slave_get_iflink,
937#ifdef CONFIG_NET_POLL_CONTROLLER
938 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
939 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
940 .ndo_poll_controller = dsa_slave_poll_controller,
941#endif
942 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
943 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
944 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
945 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
946 .ndo_setup_tc = dsa_slave_setup_tc,
947};
948
949static const struct switchdev_ops dsa_slave_switchdev_ops = {
950 .switchdev_port_attr_get = dsa_slave_port_attr_get,
951 .switchdev_port_attr_set = dsa_slave_port_attr_set,
952 .switchdev_port_obj_add = dsa_slave_port_obj_add,
953 .switchdev_port_obj_del = dsa_slave_port_obj_del,
954 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
955};
956
957static struct device_type dsa_type = {
958 .name = "dsa",
959};
960
961static void dsa_slave_adjust_link(struct net_device *dev)
962{
963 struct dsa_slave_priv *p = netdev_priv(dev);
964 struct dsa_switch *ds = p->dp->ds;
965 unsigned int status_changed = 0;
966
967 if (p->old_link != p->phy->link) {
968 status_changed = 1;
969 p->old_link = p->phy->link;
970 }
971
972 if (p->old_duplex != p->phy->duplex) {
973 status_changed = 1;
974 p->old_duplex = p->phy->duplex;
975 }
976
977 if (p->old_pause != p->phy->pause) {
978 status_changed = 1;
979 p->old_pause = p->phy->pause;
980 }
981
982 if (ds->ops->adjust_link && status_changed)
983 ds->ops->adjust_link(ds, p->dp->index, p->phy);
984
985 if (status_changed)
986 phy_print_status(p->phy);
987}
988
989static int dsa_slave_fixed_link_update(struct net_device *dev,
990 struct fixed_phy_status *status)
991{
992 struct dsa_slave_priv *p;
993 struct dsa_switch *ds;
994
995 if (dev) {
996 p = netdev_priv(dev);
997 ds = p->dp->ds;
998 if (ds->ops->fixed_link_update)
999 ds->ops->fixed_link_update(ds, p->dp->index, status);
1000 }
1001
1002 return 0;
1003}
1004
1005/* slave device setup *******************************************************/
1006static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
1007 struct net_device *slave_dev,
1008 int addr)
1009{
1010 struct dsa_switch *ds = p->dp->ds;
1011
1012 p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr);
1013 if (!p->phy) {
1014 netdev_err(slave_dev, "no phy at %d\n", addr);
1015 return -ENODEV;
1016 }
1017
1018 /* Use already configured phy mode */
1019 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1020 p->phy_interface = p->phy->interface;
1021 return phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
1022 p->phy_interface);
1023}
1024
1025static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
1026 struct net_device *slave_dev)
1027{
1028 struct dsa_switch *ds = p->dp->ds;
1029 struct device_node *phy_dn, *port_dn;
1030 bool phy_is_fixed = false;
1031 u32 phy_flags = 0;
1032 int mode, ret;
1033
1034 port_dn = p->dp->dn;
1035 mode = of_get_phy_mode(port_dn);
1036 if (mode < 0)
1037 mode = PHY_INTERFACE_MODE_NA;
1038 p->phy_interface = mode;
1039
1040 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1041 if (!phy_dn && of_phy_is_fixed_link(port_dn)) {
1042 /* In the case of a fixed PHY, the DT node associated
1043 * to the fixed PHY is the Port DT node
1044 */
1045 ret = of_phy_register_fixed_link(port_dn);
1046 if (ret) {
1047 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
1048 return ret;
1049 }
1050 phy_is_fixed = true;
1051 phy_dn = of_node_get(port_dn);
1052 }
1053
1054 if (ds->ops->get_phy_flags)
1055 phy_flags = ds->ops->get_phy_flags(ds, p->dp->index);
1056
1057 if (phy_dn) {
1058 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
1059
1060 /* If this PHY address is part of phys_mii_mask, which means
1061 * that we need to divert reads and writes to/from it, then we
1062 * want to bind this device using the slave MII bus created by
1063 * DSA to make that happen.
1064 */
1065 if (!phy_is_fixed && phy_id >= 0 &&
1066 (ds->phys_mii_mask & (1 << phy_id))) {
1067 ret = dsa_slave_phy_connect(p, slave_dev, phy_id);
1068 if (ret) {
1069 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret);
1070 of_node_put(phy_dn);
1071 return ret;
1072 }
1073 } else {
1074 p->phy = of_phy_connect(slave_dev, phy_dn,
1075 dsa_slave_adjust_link,
1076 phy_flags,
1077 p->phy_interface);
1078 }
1079
1080 of_node_put(phy_dn);
1081 }
1082
1083 if (p->phy && phy_is_fixed)
1084 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
1085
1086 /* We could not connect to a designated PHY, so use the switch internal
1087 * MDIO bus instead
1088 */
1089 if (!p->phy) {
1090 ret = dsa_slave_phy_connect(p, slave_dev, p->dp->index);
1091 if (ret) {
1092 netdev_err(slave_dev, "failed to connect to port %d: %d\n",
1093 p->dp->index, ret);
1094 if (phy_is_fixed)
1095 of_phy_deregister_fixed_link(port_dn);
1096 return ret;
1097 }
1098 }
1099
1100 phy_attached_info(p->phy);
1101
1102 return 0;
1103}
1104
1105static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1106static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1107 struct netdev_queue *txq,
1108 void *_unused)
1109{
1110 lockdep_set_class(&txq->_xmit_lock,
1111 &dsa_slave_netdev_xmit_lock_key);
1112}
1113
1114int dsa_slave_suspend(struct net_device *slave_dev)
1115{
1116 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1117
1118 netif_device_detach(slave_dev);
1119
1120 if (p->phy) {
1121 phy_stop(p->phy);
1122 p->old_pause = -1;
1123 p->old_link = -1;
1124 p->old_duplex = -1;
1125 phy_suspend(p->phy);
1126 }
1127
1128 return 0;
1129}
1130
1131int dsa_slave_resume(struct net_device *slave_dev)
1132{
1133 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1134
1135 netif_device_attach(slave_dev);
1136
1137 if (p->phy) {
1138 phy_resume(p->phy);
1139 phy_start(p->phy);
1140 }
1141
1142 return 0;
1143}
1144
1145int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1146 int port, const char *name)
1147{
1148 struct dsa_switch_tree *dst = ds->dst;
1149 struct net_device *master;
1150 struct net_device *slave_dev;
1151 struct dsa_slave_priv *p;
1152 struct dsa_port *cpu_dp;
1153 int ret;
1154
1155 cpu_dp = ds->dst->cpu_dp;
1156 master = cpu_dp->netdev;
1157
1158 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1159 NET_NAME_UNKNOWN, ether_setup);
1160 if (slave_dev == NULL)
1161 return -ENOMEM;
1162
1163 slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
1164 slave_dev->hw_features |= NETIF_F_HW_TC;
1165 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1166 eth_hw_addr_inherit(slave_dev, master);
1167 slave_dev->priv_flags |= IFF_NO_QUEUE;
1168 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1169 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1170 slave_dev->min_mtu = 0;
1171 slave_dev->max_mtu = ETH_MAX_MTU;
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->dp = &ds->ports[port];
1183 INIT_LIST_HEAD(&p->mall_tc_list);
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
1213void dsa_slave_destroy(struct net_device *slave_dev)
1214{
1215 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1216 struct device_node *port_dn;
1217
1218 port_dn = p->dp->dn;
1219
1220 netif_carrier_off(slave_dev);
1221 if (p->phy) {
1222 phy_disconnect(p->phy);
1223
1224 if (of_phy_is_fixed_link(port_dn))
1225 of_phy_deregister_fixed_link(port_dn);
1226 }
1227 unregister_netdev(slave_dev);
1228 free_netdev(slave_dev);
1229}
1230
1231static bool dsa_slave_dev_check(struct net_device *dev)
1232{
1233 return dev->netdev_ops == &dsa_slave_netdev_ops;
1234}
1235
1236static int dsa_slave_changeupper(struct net_device *dev,
1237 struct netdev_notifier_changeupper_info *info)
1238{
1239 struct dsa_slave_priv *p = netdev_priv(dev);
1240 struct dsa_port *dp = p->dp;
1241 int err = NOTIFY_DONE;
1242
1243 if (netif_is_bridge_master(info->upper_dev)) {
1244 if (info->linking) {
1245 err = dsa_port_bridge_join(dp, info->upper_dev);
1246 err = notifier_from_errno(err);
1247 } else {
1248 dsa_port_bridge_leave(dp, info->upper_dev);
1249 err = NOTIFY_OK;
1250 }
1251 }
1252
1253 return err;
1254}
1255
1256static int dsa_slave_netdevice_event(struct notifier_block *nb,
1257 unsigned long event, void *ptr)
1258{
1259 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1260
1261 if (dev->netdev_ops != &dsa_slave_netdev_ops)
1262 return NOTIFY_DONE;
1263
1264 if (event == NETDEV_CHANGEUPPER)
1265 return dsa_slave_changeupper(dev, ptr);
1266
1267 return NOTIFY_DONE;
1268}
1269
1270static struct notifier_block dsa_slave_nb __read_mostly = {
1271 .notifier_call = dsa_slave_netdevice_event,
1272};
1273
1274int dsa_slave_register_notifier(void)
1275{
1276 return register_netdevice_notifier(&dsa_slave_nb);
1277}
1278
1279void dsa_slave_unregister_notifier(void)
1280{
1281 int err;
1282
1283 err = unregister_netdevice_notifier(&dsa_slave_nb);
1284 if (err)
1285 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
1286}
Linux 6.x block layer and io_uring tree(s)