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Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
[mirror_ubuntu-artful-kernel.git] / net / dsa / slave.c
1 /*
2 * net/dsa/slave.c - Slave device handling
3 * Copyright (c) 2008-2009 Marvell Semiconductor
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10
11 #include <linux/list.h>
12 #include <linux/etherdevice.h>
13 #include <linux/netdevice.h>
14 #include <linux/phy.h>
15 #include <linux/phy_fixed.h>
16 #include <linux/of_net.h>
17 #include <linux/of_mdio.h>
18 #include <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
28 static bool dsa_slave_dev_check(struct net_device *dev);
29
30 /* slave mii_bus handling ***************************************************/
31 static 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
41 static 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
51 void 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 ****************************************************/
65 static 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
72 static 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
114 clear_promisc:
115 if (dev->flags & IFF_PROMISC)
116 dev_set_promiscuity(master, -1);
117 clear_allmulti:
118 if (dev->flags & IFF_ALLMULTI)
119 dev_set_allmulti(master, -1);
120 del_unicast:
121 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
122 dev_uc_del(master, dev->dev_addr);
123 out:
124 return err;
125 }
126
127 static 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
154 static 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
165 static 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
174 static 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
196 out:
197 ether_addr_copy(dev->dev_addr, addr->sa_data);
198
199 return 0;
200 }
201
202 static 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
212 static 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
239 static 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
271 static 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
296 static 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
322 static 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
340 static 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
352 static 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 *******************************************************/
385 static int
386 dsa_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
399 static int
400 dsa_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
411 static 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
419 static 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
430 static void
431 dsa_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
440 static 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
450 static 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
462 static 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
476 static 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
488 static 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
500 static 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
518 static 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
537 static 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
553 static 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
591 static 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
606 static 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
624 static 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
633 static 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
645 static 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 if (!ds->ops->set_eee)
652 return -EOPNOTSUPP;
653
654 ret = ds->ops->set_eee(ds, p->dp->index, p->phy, e);
655 if (ret)
656 return ret;
657
658 if (p->phy)
659 ret = phy_ethtool_set_eee(p->phy, e);
660
661 return ret;
662 }
663
664 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
665 {
666 struct dsa_slave_priv *p = netdev_priv(dev);
667 struct dsa_switch *ds = p->dp->ds;
668 int ret;
669
670 if (!ds->ops->get_eee)
671 return -EOPNOTSUPP;
672
673 ret = ds->ops->get_eee(ds, p->dp->index, e);
674 if (ret)
675 return ret;
676
677 if (p->phy)
678 ret = phy_ethtool_get_eee(p->phy, e);
679
680 return ret;
681 }
682
683 #ifdef CONFIG_NET_POLL_CONTROLLER
684 static int dsa_slave_netpoll_setup(struct net_device *dev,
685 struct netpoll_info *ni)
686 {
687 struct dsa_slave_priv *p = netdev_priv(dev);
688 struct net_device *master = dsa_master_netdev(p);
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;
703 out:
704 return err;
705 }
706
707 static 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
720 static void dsa_slave_poll_controller(struct net_device *dev)
721 {
722 }
723 #endif
724
725 static int dsa_slave_get_phys_port_name(struct net_device *dev,
726 char *name, size_t len)
727 {
728 struct dsa_slave_priv *p = netdev_priv(dev);
729
730 if (snprintf(name, len, "p%d", p->dp->index) >= len)
731 return -EINVAL;
732
733 return 0;
734 }
735
736 static struct dsa_mall_tc_entry *
737 dsa_slave_mall_tc_entry_find(struct dsa_slave_priv *p,
738 unsigned long cookie)
739 {
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
749 static int dsa_slave_add_cls_matchall(struct net_device *dev,
750 __be16 protocol,
751 struct tc_cls_matchall_offload *cls,
752 bool ingress)
753 {
754 struct dsa_slave_priv *p = netdev_priv(dev);
755 struct dsa_mall_tc_entry *mall_tc_entry;
756 struct dsa_switch *ds = p->dp->ds;
757 struct net *net = dev_net(dev);
758 struct dsa_slave_priv *to_p;
759 struct net_device *to_dev;
760 const struct tc_action *a;
761 int err = -EOPNOTSUPP;
762 LIST_HEAD(actions);
763 int ifindex;
764
765 if (!ds->ops->port_mirror_add)
766 return err;
767
768 if (!tc_single_action(cls->exts))
769 return err;
770
771 tcf_exts_to_list(cls->exts, &actions);
772 a = list_first_entry(&actions, struct tc_action, list);
773
774 if (is_tcf_mirred_egress_mirror(a) && protocol == htons(ETH_P_ALL)) {
775 struct dsa_mall_mirror_tc_entry *mirror;
776
777 ifindex = tcf_mirred_ifindex(a);
778 to_dev = __dev_get_by_index(net, ifindex);
779 if (!to_dev)
780 return -EINVAL;
781
782 if (!dsa_slave_dev_check(to_dev))
783 return -EOPNOTSUPP;
784
785 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
786 if (!mall_tc_entry)
787 return -ENOMEM;
788
789 mall_tc_entry->cookie = cls->cookie;
790 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
791 mirror = &mall_tc_entry->mirror;
792
793 to_p = netdev_priv(to_dev);
794
795 mirror->to_local_port = to_p->dp->index;
796 mirror->ingress = ingress;
797
798 err = ds->ops->port_mirror_add(ds, p->dp->index, mirror,
799 ingress);
800 if (err) {
801 kfree(mall_tc_entry);
802 return err;
803 }
804
805 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
806 }
807
808 return 0;
809 }
810
811 static void dsa_slave_del_cls_matchall(struct net_device *dev,
812 struct tc_cls_matchall_offload *cls)
813 {
814 struct dsa_slave_priv *p = netdev_priv(dev);
815 struct dsa_mall_tc_entry *mall_tc_entry;
816 struct dsa_switch *ds = p->dp->ds;
817
818 if (!ds->ops->port_mirror_del)
819 return;
820
821 mall_tc_entry = dsa_slave_mall_tc_entry_find(p, cls->cookie);
822 if (!mall_tc_entry)
823 return;
824
825 list_del(&mall_tc_entry->list);
826
827 switch (mall_tc_entry->type) {
828 case DSA_PORT_MALL_MIRROR:
829 ds->ops->port_mirror_del(ds, p->dp->index,
830 &mall_tc_entry->mirror);
831 break;
832 default:
833 WARN_ON(1);
834 }
835
836 kfree(mall_tc_entry);
837 }
838
839 static int dsa_slave_setup_tc(struct net_device *dev, u32 handle,
840 u32 chain_index, __be16 protocol,
841 struct tc_to_netdev *tc)
842 {
843 bool ingress = TC_H_MAJ(handle) == TC_H_MAJ(TC_H_INGRESS);
844
845 if (chain_index)
846 return -EOPNOTSUPP;
847
848 switch (tc->type) {
849 case TC_SETUP_MATCHALL:
850 switch (tc->cls_mall->command) {
851 case TC_CLSMATCHALL_REPLACE:
852 return dsa_slave_add_cls_matchall(dev, protocol,
853 tc->cls_mall,
854 ingress);
855 case TC_CLSMATCHALL_DESTROY:
856 dsa_slave_del_cls_matchall(dev, tc->cls_mall);
857 return 0;
858 }
859 default:
860 return -EOPNOTSUPP;
861 }
862 }
863
864 void dsa_cpu_port_ethtool_init(struct ethtool_ops *ops)
865 {
866 ops->get_sset_count = dsa_cpu_port_get_sset_count;
867 ops->get_ethtool_stats = dsa_cpu_port_get_ethtool_stats;
868 ops->get_strings = dsa_cpu_port_get_strings;
869 }
870
871 static int dsa_slave_get_rxnfc(struct net_device *dev,
872 struct ethtool_rxnfc *nfc, u32 *rule_locs)
873 {
874 struct dsa_slave_priv *p = netdev_priv(dev);
875 struct dsa_switch *ds = p->dp->ds;
876
877 if (!ds->ops->get_rxnfc)
878 return -EOPNOTSUPP;
879
880 return ds->ops->get_rxnfc(ds, p->dp->index, nfc, rule_locs);
881 }
882
883 static int dsa_slave_set_rxnfc(struct net_device *dev,
884 struct ethtool_rxnfc *nfc)
885 {
886 struct dsa_slave_priv *p = netdev_priv(dev);
887 struct dsa_switch *ds = p->dp->ds;
888
889 if (!ds->ops->set_rxnfc)
890 return -EOPNOTSUPP;
891
892 return ds->ops->set_rxnfc(ds, p->dp->index, nfc);
893 }
894
895 static const struct ethtool_ops dsa_slave_ethtool_ops = {
896 .get_drvinfo = dsa_slave_get_drvinfo,
897 .get_regs_len = dsa_slave_get_regs_len,
898 .get_regs = dsa_slave_get_regs,
899 .nway_reset = dsa_slave_nway_reset,
900 .get_link = dsa_slave_get_link,
901 .get_eeprom_len = dsa_slave_get_eeprom_len,
902 .get_eeprom = dsa_slave_get_eeprom,
903 .set_eeprom = dsa_slave_set_eeprom,
904 .get_strings = dsa_slave_get_strings,
905 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
906 .get_sset_count = dsa_slave_get_sset_count,
907 .set_wol = dsa_slave_set_wol,
908 .get_wol = dsa_slave_get_wol,
909 .set_eee = dsa_slave_set_eee,
910 .get_eee = dsa_slave_get_eee,
911 .get_link_ksettings = dsa_slave_get_link_ksettings,
912 .set_link_ksettings = dsa_slave_set_link_ksettings,
913 .get_rxnfc = dsa_slave_get_rxnfc,
914 .set_rxnfc = dsa_slave_set_rxnfc,
915 };
916
917 static const struct net_device_ops dsa_slave_netdev_ops = {
918 .ndo_open = dsa_slave_open,
919 .ndo_stop = dsa_slave_close,
920 .ndo_start_xmit = dsa_slave_xmit,
921 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
922 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
923 .ndo_set_mac_address = dsa_slave_set_mac_address,
924 .ndo_fdb_add = switchdev_port_fdb_add,
925 .ndo_fdb_del = switchdev_port_fdb_del,
926 .ndo_fdb_dump = switchdev_port_fdb_dump,
927 .ndo_do_ioctl = dsa_slave_ioctl,
928 .ndo_get_iflink = dsa_slave_get_iflink,
929 #ifdef CONFIG_NET_POLL_CONTROLLER
930 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
931 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
932 .ndo_poll_controller = dsa_slave_poll_controller,
933 #endif
934 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
935 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
936 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
937 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
938 .ndo_setup_tc = dsa_slave_setup_tc,
939 };
940
941 static const struct switchdev_ops dsa_slave_switchdev_ops = {
942 .switchdev_port_attr_get = dsa_slave_port_attr_get,
943 .switchdev_port_attr_set = dsa_slave_port_attr_set,
944 .switchdev_port_obj_add = dsa_slave_port_obj_add,
945 .switchdev_port_obj_del = dsa_slave_port_obj_del,
946 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
947 };
948
949 static struct device_type dsa_type = {
950 .name = "dsa",
951 };
952
953 static void dsa_slave_adjust_link(struct net_device *dev)
954 {
955 struct dsa_slave_priv *p = netdev_priv(dev);
956 struct dsa_switch *ds = p->dp->ds;
957 unsigned int status_changed = 0;
958
959 if (p->old_link != p->phy->link) {
960 status_changed = 1;
961 p->old_link = p->phy->link;
962 }
963
964 if (p->old_duplex != p->phy->duplex) {
965 status_changed = 1;
966 p->old_duplex = p->phy->duplex;
967 }
968
969 if (p->old_pause != p->phy->pause) {
970 status_changed = 1;
971 p->old_pause = p->phy->pause;
972 }
973
974 if (ds->ops->adjust_link && status_changed)
975 ds->ops->adjust_link(ds, p->dp->index, p->phy);
976
977 if (status_changed)
978 phy_print_status(p->phy);
979 }
980
981 static int dsa_slave_fixed_link_update(struct net_device *dev,
982 struct fixed_phy_status *status)
983 {
984 struct dsa_slave_priv *p;
985 struct dsa_switch *ds;
986
987 if (dev) {
988 p = netdev_priv(dev);
989 ds = p->dp->ds;
990 if (ds->ops->fixed_link_update)
991 ds->ops->fixed_link_update(ds, p->dp->index, status);
992 }
993
994 return 0;
995 }
996
997 /* slave device setup *******************************************************/
998 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
999 struct net_device *slave_dev,
1000 int addr)
1001 {
1002 struct dsa_switch *ds = p->dp->ds;
1003
1004 p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr);
1005 if (!p->phy) {
1006 netdev_err(slave_dev, "no phy at %d\n", addr);
1007 return -ENODEV;
1008 }
1009
1010 /* Use already configured phy mode */
1011 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1012 p->phy_interface = p->phy->interface;
1013 return phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
1014 p->phy_interface);
1015 }
1016
1017 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
1018 struct net_device *slave_dev)
1019 {
1020 struct dsa_switch *ds = p->dp->ds;
1021 struct device_node *phy_dn, *port_dn;
1022 bool phy_is_fixed = false;
1023 u32 phy_flags = 0;
1024 int mode, ret;
1025
1026 port_dn = p->dp->dn;
1027 mode = of_get_phy_mode(port_dn);
1028 if (mode < 0)
1029 mode = PHY_INTERFACE_MODE_NA;
1030 p->phy_interface = mode;
1031
1032 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1033 if (!phy_dn && of_phy_is_fixed_link(port_dn)) {
1034 /* In the case of a fixed PHY, the DT node associated
1035 * to the fixed PHY is the Port DT node
1036 */
1037 ret = of_phy_register_fixed_link(port_dn);
1038 if (ret) {
1039 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
1040 return ret;
1041 }
1042 phy_is_fixed = true;
1043 phy_dn = of_node_get(port_dn);
1044 }
1045
1046 if (ds->ops->get_phy_flags)
1047 phy_flags = ds->ops->get_phy_flags(ds, p->dp->index);
1048
1049 if (phy_dn) {
1050 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
1051
1052 /* If this PHY address is part of phys_mii_mask, which means
1053 * that we need to divert reads and writes to/from it, then we
1054 * want to bind this device using the slave MII bus created by
1055 * DSA to make that happen.
1056 */
1057 if (!phy_is_fixed && phy_id >= 0 &&
1058 (ds->phys_mii_mask & (1 << phy_id))) {
1059 ret = dsa_slave_phy_connect(p, slave_dev, phy_id);
1060 if (ret) {
1061 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret);
1062 of_node_put(phy_dn);
1063 return ret;
1064 }
1065 } else {
1066 p->phy = of_phy_connect(slave_dev, phy_dn,
1067 dsa_slave_adjust_link,
1068 phy_flags,
1069 p->phy_interface);
1070 }
1071
1072 of_node_put(phy_dn);
1073 }
1074
1075 if (p->phy && phy_is_fixed)
1076 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
1077
1078 /* We could not connect to a designated PHY, so use the switch internal
1079 * MDIO bus instead
1080 */
1081 if (!p->phy) {
1082 ret = dsa_slave_phy_connect(p, slave_dev, p->dp->index);
1083 if (ret) {
1084 netdev_err(slave_dev, "failed to connect to port %d: %d\n",
1085 p->dp->index, ret);
1086 if (phy_is_fixed)
1087 of_phy_deregister_fixed_link(port_dn);
1088 return ret;
1089 }
1090 }
1091
1092 phy_attached_info(p->phy);
1093
1094 return 0;
1095 }
1096
1097 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1098 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1099 struct netdev_queue *txq,
1100 void *_unused)
1101 {
1102 lockdep_set_class(&txq->_xmit_lock,
1103 &dsa_slave_netdev_xmit_lock_key);
1104 }
1105
1106 int dsa_slave_suspend(struct net_device *slave_dev)
1107 {
1108 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1109
1110 netif_device_detach(slave_dev);
1111
1112 if (p->phy) {
1113 phy_stop(p->phy);
1114 p->old_pause = -1;
1115 p->old_link = -1;
1116 p->old_duplex = -1;
1117 phy_suspend(p->phy);
1118 }
1119
1120 return 0;
1121 }
1122
1123 int dsa_slave_resume(struct net_device *slave_dev)
1124 {
1125 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1126
1127 netif_device_attach(slave_dev);
1128
1129 if (p->phy) {
1130 phy_resume(p->phy);
1131 phy_start(p->phy);
1132 }
1133
1134 return 0;
1135 }
1136
1137 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1138 int port, const char *name)
1139 {
1140 struct dsa_switch_tree *dst = ds->dst;
1141 struct net_device *master;
1142 struct net_device *slave_dev;
1143 struct dsa_slave_priv *p;
1144 struct dsa_port *cpu_dp;
1145 int ret;
1146
1147 cpu_dp = ds->dst->cpu_dp;
1148 master = cpu_dp->netdev;
1149
1150 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1151 NET_NAME_UNKNOWN, ether_setup);
1152 if (slave_dev == NULL)
1153 return -ENOMEM;
1154
1155 slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
1156 slave_dev->hw_features |= NETIF_F_HW_TC;
1157 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1158 eth_hw_addr_inherit(slave_dev, master);
1159 slave_dev->priv_flags |= IFF_NO_QUEUE;
1160 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1161 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1162 slave_dev->min_mtu = 0;
1163 slave_dev->max_mtu = ETH_MAX_MTU;
1164 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1165
1166 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1167 NULL);
1168
1169 SET_NETDEV_DEV(slave_dev, parent);
1170 slave_dev->dev.of_node = ds->ports[port].dn;
1171 slave_dev->vlan_features = master->vlan_features;
1172
1173 p = netdev_priv(slave_dev);
1174 p->dp = &ds->ports[port];
1175 INIT_LIST_HEAD(&p->mall_tc_list);
1176 p->xmit = dst->tag_ops->xmit;
1177
1178 p->old_pause = -1;
1179 p->old_link = -1;
1180 p->old_duplex = -1;
1181
1182 ds->ports[port].netdev = slave_dev;
1183 ret = register_netdev(slave_dev);
1184 if (ret) {
1185 netdev_err(master, "error %d registering interface %s\n",
1186 ret, slave_dev->name);
1187 ds->ports[port].netdev = NULL;
1188 free_netdev(slave_dev);
1189 return ret;
1190 }
1191
1192 netif_carrier_off(slave_dev);
1193
1194 ret = dsa_slave_phy_setup(p, slave_dev);
1195 if (ret) {
1196 netdev_err(master, "error %d setting up slave phy\n", ret);
1197 unregister_netdev(slave_dev);
1198 free_netdev(slave_dev);
1199 return ret;
1200 }
1201
1202 return 0;
1203 }
1204
1205 void dsa_slave_destroy(struct net_device *slave_dev)
1206 {
1207 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1208 struct device_node *port_dn;
1209
1210 port_dn = p->dp->dn;
1211
1212 netif_carrier_off(slave_dev);
1213 if (p->phy) {
1214 phy_disconnect(p->phy);
1215
1216 if (of_phy_is_fixed_link(port_dn))
1217 of_phy_deregister_fixed_link(port_dn);
1218 }
1219 unregister_netdev(slave_dev);
1220 free_netdev(slave_dev);
1221 }
1222
1223 static bool dsa_slave_dev_check(struct net_device *dev)
1224 {
1225 return dev->netdev_ops == &dsa_slave_netdev_ops;
1226 }
1227
1228 static int dsa_slave_changeupper(struct net_device *dev,
1229 struct netdev_notifier_changeupper_info *info)
1230 {
1231 struct dsa_slave_priv *p = netdev_priv(dev);
1232 struct dsa_port *dp = p->dp;
1233 int err = NOTIFY_DONE;
1234
1235 if (netif_is_bridge_master(info->upper_dev)) {
1236 if (info->linking) {
1237 err = dsa_port_bridge_join(dp, info->upper_dev);
1238 err = notifier_from_errno(err);
1239 } else {
1240 dsa_port_bridge_leave(dp, info->upper_dev);
1241 err = NOTIFY_OK;
1242 }
1243 }
1244
1245 return err;
1246 }
1247
1248 static int dsa_slave_netdevice_event(struct notifier_block *nb,
1249 unsigned long event, void *ptr)
1250 {
1251 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1252
1253 if (dev->netdev_ops != &dsa_slave_netdev_ops)
1254 return NOTIFY_DONE;
1255
1256 if (event == NETDEV_CHANGEUPPER)
1257 return dsa_slave_changeupper(dev, ptr);
1258
1259 return NOTIFY_DONE;
1260 }
1261
1262 static struct notifier_block dsa_slave_nb __read_mostly = {
1263 .notifier_call = dsa_slave_netdevice_event,
1264 };
1265
1266 int dsa_slave_register_notifier(void)
1267 {
1268 return register_netdevice_notifier(&dsa_slave_nb);
1269 }
1270
1271 void dsa_slave_unregister_notifier(void)
1272 {
1273 int err;
1274
1275 err = unregister_netdevice_notifier(&dsa_slave_nb);
1276 if (err)
1277 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
1278 }
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