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Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[deliverable/linux.git] / net / dsa / slave.c
1 /*
2 * net/dsa/slave.c - Slave device handling
3 * Copyright (c) 2008-2009 Marvell Semiconductor
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10
11 #include <linux/list.h>
12 #include <linux/etherdevice.h>
13 #include <linux/netdevice.h>
14 #include <linux/phy.h>
15 #include <linux/phy_fixed.h>
16 #include <linux/of_net.h>
17 #include <linux/of_mdio.h>
18 #include <linux/mdio.h>
19 #include <net/rtnetlink.h>
20 #include <net/switchdev.h>
21 #include <linux/if_bridge.h>
22 #include <linux/netpoll.h>
23 #include "dsa_priv.h"
24
25 /* slave mii_bus handling ***************************************************/
26 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
27 {
28 struct dsa_switch *ds = bus->priv;
29
30 if (ds->phys_mii_mask & (1 << addr))
31 return ds->drv->phy_read(ds, addr, reg);
32
33 return 0xffff;
34 }
35
36 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
37 {
38 struct dsa_switch *ds = bus->priv;
39
40 if (ds->phys_mii_mask & (1 << addr))
41 return ds->drv->phy_write(ds, addr, reg, val);
42
43 return 0;
44 }
45
46 void dsa_slave_mii_bus_init(struct dsa_switch *ds)
47 {
48 ds->slave_mii_bus->priv = (void *)ds;
49 ds->slave_mii_bus->name = "dsa slave smi";
50 ds->slave_mii_bus->read = dsa_slave_phy_read;
51 ds->slave_mii_bus->write = dsa_slave_phy_write;
52 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x",
53 ds->index, ds->cd->sw_addr);
54 ds->slave_mii_bus->parent = ds->dev;
55 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
56 }
57
58
59 /* slave device handling ****************************************************/
60 static int dsa_slave_get_iflink(const struct net_device *dev)
61 {
62 struct dsa_slave_priv *p = netdev_priv(dev);
63
64 return p->parent->dst->master_netdev->ifindex;
65 }
66
67 static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p)
68 {
69 return !!p->bridge_dev;
70 }
71
72 static int dsa_slave_open(struct net_device *dev)
73 {
74 struct dsa_slave_priv *p = netdev_priv(dev);
75 struct net_device *master = p->parent->dst->master_netdev;
76 struct dsa_switch *ds = p->parent;
77 u8 stp_state = dsa_port_is_bridged(p) ?
78 BR_STATE_BLOCKING : BR_STATE_FORWARDING;
79 int err;
80
81 if (!(master->flags & IFF_UP))
82 return -ENETDOWN;
83
84 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
85 err = dev_uc_add(master, dev->dev_addr);
86 if (err < 0)
87 goto out;
88 }
89
90 if (dev->flags & IFF_ALLMULTI) {
91 err = dev_set_allmulti(master, 1);
92 if (err < 0)
93 goto del_unicast;
94 }
95 if (dev->flags & IFF_PROMISC) {
96 err = dev_set_promiscuity(master, 1);
97 if (err < 0)
98 goto clear_allmulti;
99 }
100
101 if (ds->drv->port_enable) {
102 err = ds->drv->port_enable(ds, p->port, p->phy);
103 if (err)
104 goto clear_promisc;
105 }
106
107 if (ds->drv->port_stp_state_set)
108 ds->drv->port_stp_state_set(ds, p->port, stp_state);
109
110 if (p->phy)
111 phy_start(p->phy);
112
113 return 0;
114
115 clear_promisc:
116 if (dev->flags & IFF_PROMISC)
117 dev_set_promiscuity(master, -1);
118 clear_allmulti:
119 if (dev->flags & IFF_ALLMULTI)
120 dev_set_allmulti(master, -1);
121 del_unicast:
122 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
123 dev_uc_del(master, dev->dev_addr);
124 out:
125 return err;
126 }
127
128 static int dsa_slave_close(struct net_device *dev)
129 {
130 struct dsa_slave_priv *p = netdev_priv(dev);
131 struct net_device *master = p->parent->dst->master_netdev;
132 struct dsa_switch *ds = p->parent;
133
134 if (p->phy)
135 phy_stop(p->phy);
136
137 dev_mc_unsync(master, dev);
138 dev_uc_unsync(master, dev);
139 if (dev->flags & IFF_ALLMULTI)
140 dev_set_allmulti(master, -1);
141 if (dev->flags & IFF_PROMISC)
142 dev_set_promiscuity(master, -1);
143
144 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
145 dev_uc_del(master, dev->dev_addr);
146
147 if (ds->drv->port_disable)
148 ds->drv->port_disable(ds, p->port, p->phy);
149
150 if (ds->drv->port_stp_state_set)
151 ds->drv->port_stp_state_set(ds, p->port, BR_STATE_DISABLED);
152
153 return 0;
154 }
155
156 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
157 {
158 struct dsa_slave_priv *p = netdev_priv(dev);
159 struct net_device *master = p->parent->dst->master_netdev;
160
161 if (change & IFF_ALLMULTI)
162 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
163 if (change & IFF_PROMISC)
164 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
165 }
166
167 static void dsa_slave_set_rx_mode(struct net_device *dev)
168 {
169 struct dsa_slave_priv *p = netdev_priv(dev);
170 struct net_device *master = p->parent->dst->master_netdev;
171
172 dev_mc_sync(master, dev);
173 dev_uc_sync(master, dev);
174 }
175
176 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
177 {
178 struct dsa_slave_priv *p = netdev_priv(dev);
179 struct net_device *master = p->parent->dst->master_netdev;
180 struct sockaddr *addr = a;
181 int err;
182
183 if (!is_valid_ether_addr(addr->sa_data))
184 return -EADDRNOTAVAIL;
185
186 if (!(dev->flags & IFF_UP))
187 goto out;
188
189 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
190 err = dev_uc_add(master, addr->sa_data);
191 if (err < 0)
192 return err;
193 }
194
195 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
196 dev_uc_del(master, dev->dev_addr);
197
198 out:
199 ether_addr_copy(dev->dev_addr, addr->sa_data);
200
201 return 0;
202 }
203
204 static int dsa_slave_port_vlan_add(struct net_device *dev,
205 const struct switchdev_obj_port_vlan *vlan,
206 struct switchdev_trans *trans)
207 {
208 struct dsa_slave_priv *p = netdev_priv(dev);
209 struct dsa_switch *ds = p->parent;
210
211 if (switchdev_trans_ph_prepare(trans)) {
212 if (!ds->drv->port_vlan_prepare || !ds->drv->port_vlan_add)
213 return -EOPNOTSUPP;
214
215 return ds->drv->port_vlan_prepare(ds, p->port, vlan, trans);
216 }
217
218 ds->drv->port_vlan_add(ds, p->port, vlan, trans);
219
220 return 0;
221 }
222
223 static int dsa_slave_port_vlan_del(struct net_device *dev,
224 const struct switchdev_obj_port_vlan *vlan)
225 {
226 struct dsa_slave_priv *p = netdev_priv(dev);
227 struct dsa_switch *ds = p->parent;
228
229 if (!ds->drv->port_vlan_del)
230 return -EOPNOTSUPP;
231
232 return ds->drv->port_vlan_del(ds, p->port, vlan);
233 }
234
235 static int dsa_slave_port_vlan_dump(struct net_device *dev,
236 struct switchdev_obj_port_vlan *vlan,
237 switchdev_obj_dump_cb_t *cb)
238 {
239 struct dsa_slave_priv *p = netdev_priv(dev);
240 struct dsa_switch *ds = p->parent;
241
242 if (ds->drv->port_vlan_dump)
243 return ds->drv->port_vlan_dump(ds, p->port, vlan, cb);
244
245 return -EOPNOTSUPP;
246 }
247
248 static int dsa_slave_port_fdb_add(struct net_device *dev,
249 const struct switchdev_obj_port_fdb *fdb,
250 struct switchdev_trans *trans)
251 {
252 struct dsa_slave_priv *p = netdev_priv(dev);
253 struct dsa_switch *ds = p->parent;
254
255 if (switchdev_trans_ph_prepare(trans)) {
256 if (!ds->drv->port_fdb_prepare || !ds->drv->port_fdb_add)
257 return -EOPNOTSUPP;
258
259 return ds->drv->port_fdb_prepare(ds, p->port, fdb, trans);
260 }
261
262 ds->drv->port_fdb_add(ds, p->port, fdb, trans);
263
264 return 0;
265 }
266
267 static int dsa_slave_port_fdb_del(struct net_device *dev,
268 const struct switchdev_obj_port_fdb *fdb)
269 {
270 struct dsa_slave_priv *p = netdev_priv(dev);
271 struct dsa_switch *ds = p->parent;
272 int ret = -EOPNOTSUPP;
273
274 if (ds->drv->port_fdb_del)
275 ret = ds->drv->port_fdb_del(ds, p->port, fdb);
276
277 return ret;
278 }
279
280 static int dsa_slave_port_fdb_dump(struct net_device *dev,
281 struct switchdev_obj_port_fdb *fdb,
282 switchdev_obj_dump_cb_t *cb)
283 {
284 struct dsa_slave_priv *p = netdev_priv(dev);
285 struct dsa_switch *ds = p->parent;
286
287 if (ds->drv->port_fdb_dump)
288 return ds->drv->port_fdb_dump(ds, p->port, fdb, cb);
289
290 return -EOPNOTSUPP;
291 }
292
293 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
294 {
295 struct dsa_slave_priv *p = netdev_priv(dev);
296
297 if (p->phy != NULL)
298 return phy_mii_ioctl(p->phy, ifr, cmd);
299
300 return -EOPNOTSUPP;
301 }
302
303 static int dsa_slave_stp_state_set(struct net_device *dev,
304 const struct switchdev_attr *attr,
305 struct switchdev_trans *trans)
306 {
307 struct dsa_slave_priv *p = netdev_priv(dev);
308 struct dsa_switch *ds = p->parent;
309
310 if (switchdev_trans_ph_prepare(trans))
311 return ds->drv->port_stp_state_set ? 0 : -EOPNOTSUPP;
312
313 ds->drv->port_stp_state_set(ds, p->port, attr->u.stp_state);
314
315 return 0;
316 }
317
318 static int dsa_slave_vlan_filtering(struct net_device *dev,
319 const struct switchdev_attr *attr,
320 struct switchdev_trans *trans)
321 {
322 struct dsa_slave_priv *p = netdev_priv(dev);
323 struct dsa_switch *ds = p->parent;
324
325 /* bridge skips -EOPNOTSUPP, so skip the prepare phase */
326 if (switchdev_trans_ph_prepare(trans))
327 return 0;
328
329 if (ds->drv->port_vlan_filtering)
330 return ds->drv->port_vlan_filtering(ds, p->port,
331 attr->u.vlan_filtering);
332
333 return 0;
334 }
335
336 static int dsa_slave_port_attr_set(struct net_device *dev,
337 const struct switchdev_attr *attr,
338 struct switchdev_trans *trans)
339 {
340 int ret;
341
342 switch (attr->id) {
343 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
344 ret = dsa_slave_stp_state_set(dev, attr, trans);
345 break;
346 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
347 ret = dsa_slave_vlan_filtering(dev, attr, trans);
348 break;
349 default:
350 ret = -EOPNOTSUPP;
351 break;
352 }
353
354 return ret;
355 }
356
357 static int dsa_slave_port_obj_add(struct net_device *dev,
358 const struct switchdev_obj *obj,
359 struct switchdev_trans *trans)
360 {
361 int err;
362
363 /* For the prepare phase, ensure the full set of changes is feasable in
364 * one go in order to signal a failure properly. If an operation is not
365 * supported, return -EOPNOTSUPP.
366 */
367
368 switch (obj->id) {
369 case SWITCHDEV_OBJ_ID_PORT_FDB:
370 err = dsa_slave_port_fdb_add(dev,
371 SWITCHDEV_OBJ_PORT_FDB(obj),
372 trans);
373 break;
374 case SWITCHDEV_OBJ_ID_PORT_VLAN:
375 err = dsa_slave_port_vlan_add(dev,
376 SWITCHDEV_OBJ_PORT_VLAN(obj),
377 trans);
378 break;
379 default:
380 err = -EOPNOTSUPP;
381 break;
382 }
383
384 return err;
385 }
386
387 static int dsa_slave_port_obj_del(struct net_device *dev,
388 const struct switchdev_obj *obj)
389 {
390 int err;
391
392 switch (obj->id) {
393 case SWITCHDEV_OBJ_ID_PORT_FDB:
394 err = dsa_slave_port_fdb_del(dev,
395 SWITCHDEV_OBJ_PORT_FDB(obj));
396 break;
397 case SWITCHDEV_OBJ_ID_PORT_VLAN:
398 err = dsa_slave_port_vlan_del(dev,
399 SWITCHDEV_OBJ_PORT_VLAN(obj));
400 break;
401 default:
402 err = -EOPNOTSUPP;
403 break;
404 }
405
406 return err;
407 }
408
409 static int dsa_slave_port_obj_dump(struct net_device *dev,
410 struct switchdev_obj *obj,
411 switchdev_obj_dump_cb_t *cb)
412 {
413 int err;
414
415 switch (obj->id) {
416 case SWITCHDEV_OBJ_ID_PORT_FDB:
417 err = dsa_slave_port_fdb_dump(dev,
418 SWITCHDEV_OBJ_PORT_FDB(obj),
419 cb);
420 break;
421 case SWITCHDEV_OBJ_ID_PORT_VLAN:
422 err = dsa_slave_port_vlan_dump(dev,
423 SWITCHDEV_OBJ_PORT_VLAN(obj),
424 cb);
425 break;
426 default:
427 err = -EOPNOTSUPP;
428 break;
429 }
430
431 return err;
432 }
433
434 static int dsa_slave_bridge_port_join(struct net_device *dev,
435 struct net_device *br)
436 {
437 struct dsa_slave_priv *p = netdev_priv(dev);
438 struct dsa_switch *ds = p->parent;
439 int ret = -EOPNOTSUPP;
440
441 p->bridge_dev = br;
442
443 if (ds->drv->port_bridge_join)
444 ret = ds->drv->port_bridge_join(ds, p->port, br);
445
446 return ret == -EOPNOTSUPP ? 0 : ret;
447 }
448
449 static void dsa_slave_bridge_port_leave(struct net_device *dev)
450 {
451 struct dsa_slave_priv *p = netdev_priv(dev);
452 struct dsa_switch *ds = p->parent;
453
454
455 if (ds->drv->port_bridge_leave)
456 ds->drv->port_bridge_leave(ds, p->port);
457
458 p->bridge_dev = NULL;
459
460 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
461 * so allow it to be in BR_STATE_FORWARDING to be kept functional
462 */
463 if (ds->drv->port_stp_state_set)
464 ds->drv->port_stp_state_set(ds, p->port, BR_STATE_FORWARDING);
465 }
466
467 static int dsa_slave_port_attr_get(struct net_device *dev,
468 struct switchdev_attr *attr)
469 {
470 struct dsa_slave_priv *p = netdev_priv(dev);
471 struct dsa_switch *ds = p->parent;
472
473 switch (attr->id) {
474 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
475 attr->u.ppid.id_len = sizeof(ds->index);
476 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
477 break;
478 default:
479 return -EOPNOTSUPP;
480 }
481
482 return 0;
483 }
484
485 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
486 struct sk_buff *skb)
487 {
488 #ifdef CONFIG_NET_POLL_CONTROLLER
489 if (p->netpoll)
490 netpoll_send_skb(p->netpoll, skb);
491 #else
492 BUG();
493 #endif
494 return NETDEV_TX_OK;
495 }
496
497 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
498 {
499 struct dsa_slave_priv *p = netdev_priv(dev);
500 struct sk_buff *nskb;
501
502 dev->stats.tx_packets++;
503 dev->stats.tx_bytes += skb->len;
504
505 /* Transmit function may have to reallocate the original SKB */
506 nskb = p->xmit(skb, dev);
507 if (!nskb)
508 return NETDEV_TX_OK;
509
510 /* SKB for netpoll still need to be mangled with the protocol-specific
511 * tag to be successfully transmitted
512 */
513 if (unlikely(netpoll_tx_running(dev)))
514 return dsa_netpoll_send_skb(p, nskb);
515
516 /* Queue the SKB for transmission on the parent interface, but
517 * do not modify its EtherType
518 */
519 nskb->dev = p->parent->dst->master_netdev;
520 dev_queue_xmit(nskb);
521
522 return NETDEV_TX_OK;
523 }
524
525 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
526 struct net_device *dev)
527 {
528 /* Just return the original SKB */
529 return skb;
530 }
531
532
533 /* ethtool operations *******************************************************/
534 static int
535 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
536 {
537 struct dsa_slave_priv *p = netdev_priv(dev);
538 int err;
539
540 err = -EOPNOTSUPP;
541 if (p->phy != NULL) {
542 err = phy_read_status(p->phy);
543 if (err == 0)
544 err = phy_ethtool_gset(p->phy, cmd);
545 }
546
547 return err;
548 }
549
550 static int
551 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
552 {
553 struct dsa_slave_priv *p = netdev_priv(dev);
554
555 if (p->phy != NULL)
556 return phy_ethtool_sset(p->phy, cmd);
557
558 return -EOPNOTSUPP;
559 }
560
561 static void dsa_slave_get_drvinfo(struct net_device *dev,
562 struct ethtool_drvinfo *drvinfo)
563 {
564 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
565 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
566 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
567 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
568 }
569
570 static int dsa_slave_get_regs_len(struct net_device *dev)
571 {
572 struct dsa_slave_priv *p = netdev_priv(dev);
573 struct dsa_switch *ds = p->parent;
574
575 if (ds->drv->get_regs_len)
576 return ds->drv->get_regs_len(ds, p->port);
577
578 return -EOPNOTSUPP;
579 }
580
581 static void
582 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
583 {
584 struct dsa_slave_priv *p = netdev_priv(dev);
585 struct dsa_switch *ds = p->parent;
586
587 if (ds->drv->get_regs)
588 ds->drv->get_regs(ds, p->port, regs, _p);
589 }
590
591 static int dsa_slave_nway_reset(struct net_device *dev)
592 {
593 struct dsa_slave_priv *p = netdev_priv(dev);
594
595 if (p->phy != NULL)
596 return genphy_restart_aneg(p->phy);
597
598 return -EOPNOTSUPP;
599 }
600
601 static u32 dsa_slave_get_link(struct net_device *dev)
602 {
603 struct dsa_slave_priv *p = netdev_priv(dev);
604
605 if (p->phy != NULL) {
606 genphy_update_link(p->phy);
607 return p->phy->link;
608 }
609
610 return -EOPNOTSUPP;
611 }
612
613 static int dsa_slave_get_eeprom_len(struct net_device *dev)
614 {
615 struct dsa_slave_priv *p = netdev_priv(dev);
616 struct dsa_switch *ds = p->parent;
617
618 if (ds->cd->eeprom_len)
619 return ds->cd->eeprom_len;
620
621 if (ds->drv->get_eeprom_len)
622 return ds->drv->get_eeprom_len(ds);
623
624 return 0;
625 }
626
627 static int dsa_slave_get_eeprom(struct net_device *dev,
628 struct ethtool_eeprom *eeprom, u8 *data)
629 {
630 struct dsa_slave_priv *p = netdev_priv(dev);
631 struct dsa_switch *ds = p->parent;
632
633 if (ds->drv->get_eeprom)
634 return ds->drv->get_eeprom(ds, eeprom, data);
635
636 return -EOPNOTSUPP;
637 }
638
639 static int dsa_slave_set_eeprom(struct net_device *dev,
640 struct ethtool_eeprom *eeprom, u8 *data)
641 {
642 struct dsa_slave_priv *p = netdev_priv(dev);
643 struct dsa_switch *ds = p->parent;
644
645 if (ds->drv->set_eeprom)
646 return ds->drv->set_eeprom(ds, eeprom, data);
647
648 return -EOPNOTSUPP;
649 }
650
651 static void dsa_slave_get_strings(struct net_device *dev,
652 uint32_t stringset, uint8_t *data)
653 {
654 struct dsa_slave_priv *p = netdev_priv(dev);
655 struct dsa_switch *ds = p->parent;
656
657 if (stringset == ETH_SS_STATS) {
658 int len = ETH_GSTRING_LEN;
659
660 strncpy(data, "tx_packets", len);
661 strncpy(data + len, "tx_bytes", len);
662 strncpy(data + 2 * len, "rx_packets", len);
663 strncpy(data + 3 * len, "rx_bytes", len);
664 if (ds->drv->get_strings != NULL)
665 ds->drv->get_strings(ds, p->port, data + 4 * len);
666 }
667 }
668
669 static void dsa_cpu_port_get_ethtool_stats(struct net_device *dev,
670 struct ethtool_stats *stats,
671 uint64_t *data)
672 {
673 struct dsa_switch_tree *dst = dev->dsa_ptr;
674 struct dsa_switch *ds = dst->ds[0];
675 s8 cpu_port = dst->cpu_port;
676 int count = 0;
677
678 if (dst->master_ethtool_ops.get_sset_count) {
679 count = dst->master_ethtool_ops.get_sset_count(dev,
680 ETH_SS_STATS);
681 dst->master_ethtool_ops.get_ethtool_stats(dev, stats, data);
682 }
683
684 if (ds->drv->get_ethtool_stats)
685 ds->drv->get_ethtool_stats(ds, cpu_port, data + count);
686 }
687
688 static int dsa_cpu_port_get_sset_count(struct net_device *dev, int sset)
689 {
690 struct dsa_switch_tree *dst = dev->dsa_ptr;
691 struct dsa_switch *ds = dst->ds[0];
692 int count = 0;
693
694 if (dst->master_ethtool_ops.get_sset_count)
695 count += dst->master_ethtool_ops.get_sset_count(dev, sset);
696
697 if (sset == ETH_SS_STATS && ds->drv->get_sset_count)
698 count += ds->drv->get_sset_count(ds);
699
700 return count;
701 }
702
703 static void dsa_cpu_port_get_strings(struct net_device *dev,
704 uint32_t stringset, uint8_t *data)
705 {
706 struct dsa_switch_tree *dst = dev->dsa_ptr;
707 struct dsa_switch *ds = dst->ds[0];
708 s8 cpu_port = dst->cpu_port;
709 int len = ETH_GSTRING_LEN;
710 int mcount = 0, count;
711 unsigned int i;
712 uint8_t pfx[4];
713 uint8_t *ndata;
714
715 snprintf(pfx, sizeof(pfx), "p%.2d", cpu_port);
716 /* We do not want to be NULL-terminated, since this is a prefix */
717 pfx[sizeof(pfx) - 1] = '_';
718
719 if (dst->master_ethtool_ops.get_sset_count) {
720 mcount = dst->master_ethtool_ops.get_sset_count(dev,
721 ETH_SS_STATS);
722 dst->master_ethtool_ops.get_strings(dev, stringset, data);
723 }
724
725 if (stringset == ETH_SS_STATS && ds->drv->get_strings) {
726 ndata = data + mcount * len;
727 /* This function copies ETH_GSTRINGS_LEN bytes, we will mangle
728 * the output after to prepend our CPU port prefix we
729 * constructed earlier
730 */
731 ds->drv->get_strings(ds, cpu_port, ndata);
732 count = ds->drv->get_sset_count(ds);
733 for (i = 0; i < count; i++) {
734 memmove(ndata + (i * len + sizeof(pfx)),
735 ndata + i * len, len - sizeof(pfx));
736 memcpy(ndata + i * len, pfx, sizeof(pfx));
737 }
738 }
739 }
740
741 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
742 struct ethtool_stats *stats,
743 uint64_t *data)
744 {
745 struct dsa_slave_priv *p = netdev_priv(dev);
746 struct dsa_switch *ds = p->parent;
747
748 data[0] = dev->stats.tx_packets;
749 data[1] = dev->stats.tx_bytes;
750 data[2] = dev->stats.rx_packets;
751 data[3] = dev->stats.rx_bytes;
752 if (ds->drv->get_ethtool_stats != NULL)
753 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
754 }
755
756 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
757 {
758 struct dsa_slave_priv *p = netdev_priv(dev);
759 struct dsa_switch *ds = p->parent;
760
761 if (sset == ETH_SS_STATS) {
762 int count;
763
764 count = 4;
765 if (ds->drv->get_sset_count != NULL)
766 count += ds->drv->get_sset_count(ds);
767
768 return count;
769 }
770
771 return -EOPNOTSUPP;
772 }
773
774 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
775 {
776 struct dsa_slave_priv *p = netdev_priv(dev);
777 struct dsa_switch *ds = p->parent;
778
779 if (ds->drv->get_wol)
780 ds->drv->get_wol(ds, p->port, w);
781 }
782
783 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
784 {
785 struct dsa_slave_priv *p = netdev_priv(dev);
786 struct dsa_switch *ds = p->parent;
787 int ret = -EOPNOTSUPP;
788
789 if (ds->drv->set_wol)
790 ret = ds->drv->set_wol(ds, p->port, w);
791
792 return ret;
793 }
794
795 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
796 {
797 struct dsa_slave_priv *p = netdev_priv(dev);
798 struct dsa_switch *ds = p->parent;
799 int ret;
800
801 if (!ds->drv->set_eee)
802 return -EOPNOTSUPP;
803
804 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
805 if (ret)
806 return ret;
807
808 if (p->phy)
809 ret = phy_ethtool_set_eee(p->phy, e);
810
811 return ret;
812 }
813
814 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
815 {
816 struct dsa_slave_priv *p = netdev_priv(dev);
817 struct dsa_switch *ds = p->parent;
818 int ret;
819
820 if (!ds->drv->get_eee)
821 return -EOPNOTSUPP;
822
823 ret = ds->drv->get_eee(ds, p->port, e);
824 if (ret)
825 return ret;
826
827 if (p->phy)
828 ret = phy_ethtool_get_eee(p->phy, e);
829
830 return ret;
831 }
832
833 #ifdef CONFIG_NET_POLL_CONTROLLER
834 static int dsa_slave_netpoll_setup(struct net_device *dev,
835 struct netpoll_info *ni)
836 {
837 struct dsa_slave_priv *p = netdev_priv(dev);
838 struct dsa_switch *ds = p->parent;
839 struct net_device *master = ds->dst->master_netdev;
840 struct netpoll *netpoll;
841 int err = 0;
842
843 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
844 if (!netpoll)
845 return -ENOMEM;
846
847 err = __netpoll_setup(netpoll, master);
848 if (err) {
849 kfree(netpoll);
850 goto out;
851 }
852
853 p->netpoll = netpoll;
854 out:
855 return err;
856 }
857
858 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
859 {
860 struct dsa_slave_priv *p = netdev_priv(dev);
861 struct netpoll *netpoll = p->netpoll;
862
863 if (!netpoll)
864 return;
865
866 p->netpoll = NULL;
867
868 __netpoll_free_async(netpoll);
869 }
870
871 static void dsa_slave_poll_controller(struct net_device *dev)
872 {
873 }
874 #endif
875
876 static const struct ethtool_ops dsa_slave_ethtool_ops = {
877 .get_settings = dsa_slave_get_settings,
878 .set_settings = dsa_slave_set_settings,
879 .get_drvinfo = dsa_slave_get_drvinfo,
880 .get_regs_len = dsa_slave_get_regs_len,
881 .get_regs = dsa_slave_get_regs,
882 .nway_reset = dsa_slave_nway_reset,
883 .get_link = dsa_slave_get_link,
884 .get_eeprom_len = dsa_slave_get_eeprom_len,
885 .get_eeprom = dsa_slave_get_eeprom,
886 .set_eeprom = dsa_slave_set_eeprom,
887 .get_strings = dsa_slave_get_strings,
888 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
889 .get_sset_count = dsa_slave_get_sset_count,
890 .set_wol = dsa_slave_set_wol,
891 .get_wol = dsa_slave_get_wol,
892 .set_eee = dsa_slave_set_eee,
893 .get_eee = dsa_slave_get_eee,
894 };
895
896 static struct ethtool_ops dsa_cpu_port_ethtool_ops;
897
898 static const struct net_device_ops dsa_slave_netdev_ops = {
899 .ndo_open = dsa_slave_open,
900 .ndo_stop = dsa_slave_close,
901 .ndo_start_xmit = dsa_slave_xmit,
902 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
903 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
904 .ndo_set_mac_address = dsa_slave_set_mac_address,
905 .ndo_fdb_add = switchdev_port_fdb_add,
906 .ndo_fdb_del = switchdev_port_fdb_del,
907 .ndo_fdb_dump = switchdev_port_fdb_dump,
908 .ndo_do_ioctl = dsa_slave_ioctl,
909 .ndo_get_iflink = dsa_slave_get_iflink,
910 #ifdef CONFIG_NET_POLL_CONTROLLER
911 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
912 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
913 .ndo_poll_controller = dsa_slave_poll_controller,
914 #endif
915 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
916 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
917 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
918 };
919
920 static const struct switchdev_ops dsa_slave_switchdev_ops = {
921 .switchdev_port_attr_get = dsa_slave_port_attr_get,
922 .switchdev_port_attr_set = dsa_slave_port_attr_set,
923 .switchdev_port_obj_add = dsa_slave_port_obj_add,
924 .switchdev_port_obj_del = dsa_slave_port_obj_del,
925 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
926 };
927
928 static struct device_type dsa_type = {
929 .name = "dsa",
930 };
931
932 static void dsa_slave_adjust_link(struct net_device *dev)
933 {
934 struct dsa_slave_priv *p = netdev_priv(dev);
935 struct dsa_switch *ds = p->parent;
936 unsigned int status_changed = 0;
937
938 if (p->old_link != p->phy->link) {
939 status_changed = 1;
940 p->old_link = p->phy->link;
941 }
942
943 if (p->old_duplex != p->phy->duplex) {
944 status_changed = 1;
945 p->old_duplex = p->phy->duplex;
946 }
947
948 if (p->old_pause != p->phy->pause) {
949 status_changed = 1;
950 p->old_pause = p->phy->pause;
951 }
952
953 if (ds->drv->adjust_link && status_changed)
954 ds->drv->adjust_link(ds, p->port, p->phy);
955
956 if (status_changed)
957 phy_print_status(p->phy);
958 }
959
960 static int dsa_slave_fixed_link_update(struct net_device *dev,
961 struct fixed_phy_status *status)
962 {
963 struct dsa_slave_priv *p;
964 struct dsa_switch *ds;
965
966 if (dev) {
967 p = netdev_priv(dev);
968 ds = p->parent;
969 if (ds->drv->fixed_link_update)
970 ds->drv->fixed_link_update(ds, p->port, status);
971 }
972
973 return 0;
974 }
975
976 /* slave device setup *******************************************************/
977 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
978 struct net_device *slave_dev,
979 int addr)
980 {
981 struct dsa_switch *ds = p->parent;
982
983 p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr);
984 if (!p->phy) {
985 netdev_err(slave_dev, "no phy at %d\n", addr);
986 return -ENODEV;
987 }
988
989 /* Use already configured phy mode */
990 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
991 p->phy_interface = p->phy->interface;
992 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
993 p->phy_interface);
994
995 return 0;
996 }
997
998 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
999 struct net_device *slave_dev)
1000 {
1001 struct dsa_switch *ds = p->parent;
1002 struct dsa_chip_data *cd = ds->cd;
1003 struct device_node *phy_dn, *port_dn;
1004 bool phy_is_fixed = false;
1005 u32 phy_flags = 0;
1006 int mode, ret;
1007
1008 port_dn = cd->port_dn[p->port];
1009 mode = of_get_phy_mode(port_dn);
1010 if (mode < 0)
1011 mode = PHY_INTERFACE_MODE_NA;
1012 p->phy_interface = mode;
1013
1014 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1015 if (of_phy_is_fixed_link(port_dn)) {
1016 /* In the case of a fixed PHY, the DT node associated
1017 * to the fixed PHY is the Port DT node
1018 */
1019 ret = of_phy_register_fixed_link(port_dn);
1020 if (ret) {
1021 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
1022 return ret;
1023 }
1024 phy_is_fixed = true;
1025 phy_dn = port_dn;
1026 }
1027
1028 if (ds->drv->get_phy_flags)
1029 phy_flags = ds->drv->get_phy_flags(ds, p->port);
1030
1031 if (phy_dn) {
1032 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
1033
1034 /* If this PHY address is part of phys_mii_mask, which means
1035 * that we need to divert reads and writes to/from it, then we
1036 * want to bind this device using the slave MII bus created by
1037 * DSA to make that happen.
1038 */
1039 if (!phy_is_fixed && phy_id >= 0 &&
1040 (ds->phys_mii_mask & (1 << phy_id))) {
1041 ret = dsa_slave_phy_connect(p, slave_dev, phy_id);
1042 if (ret) {
1043 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret);
1044 return ret;
1045 }
1046 } else {
1047 p->phy = of_phy_connect(slave_dev, phy_dn,
1048 dsa_slave_adjust_link,
1049 phy_flags,
1050 p->phy_interface);
1051 }
1052 }
1053
1054 if (p->phy && phy_is_fixed)
1055 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
1056
1057 /* We could not connect to a designated PHY, so use the switch internal
1058 * MDIO bus instead
1059 */
1060 if (!p->phy) {
1061 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
1062 if (ret) {
1063 netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret);
1064 return ret;
1065 }
1066 }
1067
1068 phy_attached_info(p->phy);
1069
1070 return 0;
1071 }
1072
1073 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1074 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1075 struct netdev_queue *txq,
1076 void *_unused)
1077 {
1078 lockdep_set_class(&txq->_xmit_lock,
1079 &dsa_slave_netdev_xmit_lock_key);
1080 }
1081
1082 int dsa_slave_suspend(struct net_device *slave_dev)
1083 {
1084 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1085
1086 if (p->phy) {
1087 phy_stop(p->phy);
1088 p->old_pause = -1;
1089 p->old_link = -1;
1090 p->old_duplex = -1;
1091 phy_suspend(p->phy);
1092 }
1093
1094 return 0;
1095 }
1096
1097 int dsa_slave_resume(struct net_device *slave_dev)
1098 {
1099 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1100
1101 netif_device_attach(slave_dev);
1102
1103 if (p->phy) {
1104 phy_resume(p->phy);
1105 phy_start(p->phy);
1106 }
1107
1108 return 0;
1109 }
1110
1111 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1112 int port, char *name)
1113 {
1114 struct net_device *master = ds->dst->master_netdev;
1115 struct dsa_switch_tree *dst = ds->dst;
1116 struct net_device *slave_dev;
1117 struct dsa_slave_priv *p;
1118 int ret;
1119
1120 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1121 NET_NAME_UNKNOWN, ether_setup);
1122 if (slave_dev == NULL)
1123 return -ENOMEM;
1124
1125 slave_dev->features = master->vlan_features;
1126 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1127 if (master->ethtool_ops != &dsa_cpu_port_ethtool_ops) {
1128 memcpy(&dst->master_ethtool_ops, master->ethtool_ops,
1129 sizeof(struct ethtool_ops));
1130 memcpy(&dsa_cpu_port_ethtool_ops, &dst->master_ethtool_ops,
1131 sizeof(struct ethtool_ops));
1132 dsa_cpu_port_ethtool_ops.get_sset_count =
1133 dsa_cpu_port_get_sset_count;
1134 dsa_cpu_port_ethtool_ops.get_ethtool_stats =
1135 dsa_cpu_port_get_ethtool_stats;
1136 dsa_cpu_port_ethtool_ops.get_strings =
1137 dsa_cpu_port_get_strings;
1138 master->ethtool_ops = &dsa_cpu_port_ethtool_ops;
1139 }
1140 eth_hw_addr_inherit(slave_dev, master);
1141 slave_dev->priv_flags |= IFF_NO_QUEUE;
1142 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1143 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1144 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1145
1146 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1147 NULL);
1148
1149 SET_NETDEV_DEV(slave_dev, parent);
1150 slave_dev->dev.of_node = ds->cd->port_dn[port];
1151 slave_dev->vlan_features = master->vlan_features;
1152
1153 p = netdev_priv(slave_dev);
1154 p->parent = ds;
1155 p->port = port;
1156
1157 switch (ds->dst->tag_protocol) {
1158 #ifdef CONFIG_NET_DSA_TAG_DSA
1159 case DSA_TAG_PROTO_DSA:
1160 p->xmit = dsa_netdev_ops.xmit;
1161 break;
1162 #endif
1163 #ifdef CONFIG_NET_DSA_TAG_EDSA
1164 case DSA_TAG_PROTO_EDSA:
1165 p->xmit = edsa_netdev_ops.xmit;
1166 break;
1167 #endif
1168 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1169 case DSA_TAG_PROTO_TRAILER:
1170 p->xmit = trailer_netdev_ops.xmit;
1171 break;
1172 #endif
1173 #ifdef CONFIG_NET_DSA_TAG_BRCM
1174 case DSA_TAG_PROTO_BRCM:
1175 p->xmit = brcm_netdev_ops.xmit;
1176 break;
1177 #endif
1178 default:
1179 p->xmit = dsa_slave_notag_xmit;
1180 break;
1181 }
1182
1183 p->old_pause = -1;
1184 p->old_link = -1;
1185 p->old_duplex = -1;
1186
1187 ds->ports[port] = slave_dev;
1188 ret = register_netdev(slave_dev);
1189 if (ret) {
1190 netdev_err(master, "error %d registering interface %s\n",
1191 ret, slave_dev->name);
1192 ds->ports[port] = NULL;
1193 free_netdev(slave_dev);
1194 return ret;
1195 }
1196
1197 netif_carrier_off(slave_dev);
1198
1199 ret = dsa_slave_phy_setup(p, slave_dev);
1200 if (ret) {
1201 netdev_err(master, "error %d setting up slave phy\n", ret);
1202 unregister_netdev(slave_dev);
1203 free_netdev(slave_dev);
1204 return ret;
1205 }
1206
1207 return 0;
1208 }
1209
1210 void dsa_slave_destroy(struct net_device *slave_dev)
1211 {
1212 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1213
1214 netif_carrier_off(slave_dev);
1215 if (p->phy)
1216 phy_disconnect(p->phy);
1217 unregister_netdev(slave_dev);
1218 free_netdev(slave_dev);
1219 }
1220
1221 static bool dsa_slave_dev_check(struct net_device *dev)
1222 {
1223 return dev->netdev_ops == &dsa_slave_netdev_ops;
1224 }
1225
1226 static int dsa_slave_port_upper_event(struct net_device *dev,
1227 unsigned long event, void *ptr)
1228 {
1229 struct netdev_notifier_changeupper_info *info = ptr;
1230 struct net_device *upper = info->upper_dev;
1231 int err = 0;
1232
1233 switch (event) {
1234 case NETDEV_CHANGEUPPER:
1235 if (netif_is_bridge_master(upper)) {
1236 if (info->linking)
1237 err = dsa_slave_bridge_port_join(dev, upper);
1238 else
1239 dsa_slave_bridge_port_leave(dev);
1240 }
1241
1242 break;
1243 }
1244
1245 return notifier_from_errno(err);
1246 }
1247
1248 static int dsa_slave_port_event(struct net_device *dev, unsigned long event,
1249 void *ptr)
1250 {
1251 switch (event) {
1252 case NETDEV_CHANGEUPPER:
1253 return dsa_slave_port_upper_event(dev, event, ptr);
1254 }
1255
1256 return NOTIFY_DONE;
1257 }
1258
1259 int dsa_slave_netdevice_event(struct notifier_block *unused,
1260 unsigned long event, void *ptr)
1261 {
1262 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1263
1264 if (dsa_slave_dev_check(dev))
1265 return dsa_slave_port_event(dev, event, ptr);
1266
1267 return NOTIFY_DONE;
1268 }
Linux kernel - Deliverables
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