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ASoC: wm_adsp: Use correct local length in error message
[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->pd->sw_addr);
54 ds->slave_mii_bus->parent = ds->master_dev;
55 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
56 }
57
58
59 /* slave device handling ****************************************************/
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_update)
108 ds->drv->port_stp_update(ds, p->port, stp_state);
109
110 if (p->phy)
111 phy_start(p->phy);
112
113 return 0;
114
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_update)
151 ds->drv->port_stp_update(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_bridge_check_vlan_range(struct dsa_switch *ds,
205 const struct net_device *bridge,
206 u16 vid_begin, u16 vid_end)
207 {
208 struct dsa_slave_priv *p;
209 struct net_device *dev, *vlan_br;
210 DECLARE_BITMAP(members, DSA_MAX_PORTS);
211 DECLARE_BITMAP(untagged, DSA_MAX_PORTS);
212 u16 vid;
213 int member, err;
214
215 if (!ds->drv->vlan_getnext || !vid_begin)
216 return -EOPNOTSUPP;
217
218 vid = vid_begin - 1;
219
220 do {
221 err = ds->drv->vlan_getnext(ds, &vid, members, untagged);
222 if (err)
223 break;
224
225 if (vid > vid_end)
226 break;
227
228 member = find_first_bit(members, DSA_MAX_PORTS);
229 if (member == DSA_MAX_PORTS)
230 continue;
231
232 dev = ds->ports[member];
233 p = netdev_priv(dev);
234 vlan_br = p->bridge_dev;
235 if (vlan_br == bridge)
236 continue;
237
238 netdev_dbg(vlan_br, "hardware VLAN %d already in use\n", vid);
239 return -EOPNOTSUPP;
240 } while (vid < vid_end);
241
242 return err == -ENOENT ? 0 : err;
243 }
244
245 static int dsa_slave_port_vlan_add(struct net_device *dev,
246 const struct switchdev_obj_port_vlan *vlan,
247 struct switchdev_trans *trans)
248 {
249 struct dsa_slave_priv *p = netdev_priv(dev);
250 struct dsa_switch *ds = p->parent;
251 int err;
252
253 if (switchdev_trans_ph_prepare(trans)) {
254 if (!ds->drv->port_vlan_prepare || !ds->drv->port_vlan_add)
255 return -EOPNOTSUPP;
256
257 /* If the requested port doesn't belong to the same bridge as
258 * the VLAN members, fallback to software VLAN (hopefully).
259 */
260 err = dsa_bridge_check_vlan_range(ds, p->bridge_dev,
261 vlan->vid_begin,
262 vlan->vid_end);
263 if (err)
264 return err;
265
266 err = ds->drv->port_vlan_prepare(ds, p->port, vlan, trans);
267 if (err)
268 return err;
269 } else {
270 err = ds->drv->port_vlan_add(ds, p->port, vlan, trans);
271 if (err)
272 return err;
273 }
274
275 return 0;
276 }
277
278 static int dsa_slave_port_vlan_del(struct net_device *dev,
279 const struct switchdev_obj_port_vlan *vlan)
280 {
281 struct dsa_slave_priv *p = netdev_priv(dev);
282 struct dsa_switch *ds = p->parent;
283
284 if (!ds->drv->port_vlan_del)
285 return -EOPNOTSUPP;
286
287 return ds->drv->port_vlan_del(ds, p->port, vlan);
288 }
289
290 static int dsa_slave_port_vlan_dump(struct net_device *dev,
291 struct switchdev_obj_port_vlan *vlan,
292 switchdev_obj_dump_cb_t *cb)
293 {
294 struct dsa_slave_priv *p = netdev_priv(dev);
295 struct dsa_switch *ds = p->parent;
296 DECLARE_BITMAP(members, DSA_MAX_PORTS);
297 DECLARE_BITMAP(untagged, DSA_MAX_PORTS);
298 u16 pvid, vid = 0;
299 int err;
300
301 if (!ds->drv->vlan_getnext || !ds->drv->port_pvid_get)
302 return -EOPNOTSUPP;
303
304 err = ds->drv->port_pvid_get(ds, p->port, &pvid);
305 if (err)
306 return err;
307
308 for (;;) {
309 err = ds->drv->vlan_getnext(ds, &vid, members, untagged);
310 if (err)
311 break;
312
313 if (!test_bit(p->port, members))
314 continue;
315
316 memset(vlan, 0, sizeof(*vlan));
317 vlan->vid_begin = vlan->vid_end = vid;
318
319 if (vid == pvid)
320 vlan->flags |= BRIDGE_VLAN_INFO_PVID;
321
322 if (test_bit(p->port, untagged))
323 vlan->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
324
325 err = cb(&vlan->obj);
326 if (err)
327 break;
328 }
329
330 return err == -ENOENT ? 0 : err;
331 }
332
333 static int dsa_slave_port_fdb_add(struct net_device *dev,
334 const struct switchdev_obj_port_fdb *fdb,
335 struct switchdev_trans *trans)
336 {
337 struct dsa_slave_priv *p = netdev_priv(dev);
338 struct dsa_switch *ds = p->parent;
339 int ret;
340
341 if (!ds->drv->port_fdb_prepare || !ds->drv->port_fdb_add)
342 return -EOPNOTSUPP;
343
344 if (switchdev_trans_ph_prepare(trans))
345 ret = ds->drv->port_fdb_prepare(ds, p->port, fdb, trans);
346 else
347 ret = ds->drv->port_fdb_add(ds, p->port, fdb, trans);
348
349 return ret;
350 }
351
352 static int dsa_slave_port_fdb_del(struct net_device *dev,
353 const struct switchdev_obj_port_fdb *fdb)
354 {
355 struct dsa_slave_priv *p = netdev_priv(dev);
356 struct dsa_switch *ds = p->parent;
357 int ret = -EOPNOTSUPP;
358
359 if (ds->drv->port_fdb_del)
360 ret = ds->drv->port_fdb_del(ds, p->port, fdb);
361
362 return ret;
363 }
364
365 static int dsa_slave_port_fdb_dump(struct net_device *dev,
366 struct switchdev_obj_port_fdb *fdb,
367 switchdev_obj_dump_cb_t *cb)
368 {
369 struct dsa_slave_priv *p = netdev_priv(dev);
370 struct dsa_switch *ds = p->parent;
371
372 if (ds->drv->port_fdb_dump)
373 return ds->drv->port_fdb_dump(ds, p->port, fdb, cb);
374
375 return -EOPNOTSUPP;
376 }
377
378 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
379 {
380 struct dsa_slave_priv *p = netdev_priv(dev);
381
382 if (p->phy != NULL)
383 return phy_mii_ioctl(p->phy, ifr, cmd);
384
385 return -EOPNOTSUPP;
386 }
387
388 /* Return a bitmask of all ports being currently bridged within a given bridge
389 * device. Note that on leave, the mask will still return the bitmask of ports
390 * currently bridged, prior to port removal, and this is exactly what we want.
391 */
392 static u32 dsa_slave_br_port_mask(struct dsa_switch *ds,
393 struct net_device *bridge)
394 {
395 struct dsa_slave_priv *p;
396 unsigned int port;
397 u32 mask = 0;
398
399 for (port = 0; port < DSA_MAX_PORTS; port++) {
400 if (!dsa_is_port_initialized(ds, port))
401 continue;
402
403 p = netdev_priv(ds->ports[port]);
404
405 if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT &&
406 p->bridge_dev == bridge)
407 mask |= 1 << port;
408 }
409
410 return mask;
411 }
412
413 static int dsa_slave_stp_update(struct net_device *dev, u8 state)
414 {
415 struct dsa_slave_priv *p = netdev_priv(dev);
416 struct dsa_switch *ds = p->parent;
417 int ret = -EOPNOTSUPP;
418
419 if (ds->drv->port_stp_update)
420 ret = ds->drv->port_stp_update(ds, p->port, state);
421
422 return ret;
423 }
424
425 static int dsa_slave_port_attr_set(struct net_device *dev,
426 const struct switchdev_attr *attr,
427 struct switchdev_trans *trans)
428 {
429 struct dsa_slave_priv *p = netdev_priv(dev);
430 struct dsa_switch *ds = p->parent;
431 int ret;
432
433 switch (attr->id) {
434 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
435 if (switchdev_trans_ph_prepare(trans))
436 ret = ds->drv->port_stp_update ? 0 : -EOPNOTSUPP;
437 else
438 ret = ds->drv->port_stp_update(ds, p->port,
439 attr->u.stp_state);
440 break;
441 default:
442 ret = -EOPNOTSUPP;
443 break;
444 }
445
446 return ret;
447 }
448
449 static int dsa_slave_port_obj_add(struct net_device *dev,
450 const struct switchdev_obj *obj,
451 struct switchdev_trans *trans)
452 {
453 int err;
454
455 /* For the prepare phase, ensure the full set of changes is feasable in
456 * one go in order to signal a failure properly. If an operation is not
457 * supported, return -EOPNOTSUPP.
458 */
459
460 switch (obj->id) {
461 case SWITCHDEV_OBJ_ID_PORT_FDB:
462 err = dsa_slave_port_fdb_add(dev,
463 SWITCHDEV_OBJ_PORT_FDB(obj),
464 trans);
465 break;
466 case SWITCHDEV_OBJ_ID_PORT_VLAN:
467 err = dsa_slave_port_vlan_add(dev,
468 SWITCHDEV_OBJ_PORT_VLAN(obj),
469 trans);
470 break;
471 default:
472 err = -EOPNOTSUPP;
473 break;
474 }
475
476 return err;
477 }
478
479 static int dsa_slave_port_obj_del(struct net_device *dev,
480 const struct switchdev_obj *obj)
481 {
482 int err;
483
484 switch (obj->id) {
485 case SWITCHDEV_OBJ_ID_PORT_FDB:
486 err = dsa_slave_port_fdb_del(dev,
487 SWITCHDEV_OBJ_PORT_FDB(obj));
488 break;
489 case SWITCHDEV_OBJ_ID_PORT_VLAN:
490 err = dsa_slave_port_vlan_del(dev,
491 SWITCHDEV_OBJ_PORT_VLAN(obj));
492 break;
493 default:
494 err = -EOPNOTSUPP;
495 break;
496 }
497
498 return err;
499 }
500
501 static int dsa_slave_port_obj_dump(struct net_device *dev,
502 struct switchdev_obj *obj,
503 switchdev_obj_dump_cb_t *cb)
504 {
505 int err;
506
507 switch (obj->id) {
508 case SWITCHDEV_OBJ_ID_PORT_FDB:
509 err = dsa_slave_port_fdb_dump(dev,
510 SWITCHDEV_OBJ_PORT_FDB(obj),
511 cb);
512 break;
513 case SWITCHDEV_OBJ_ID_PORT_VLAN:
514 err = dsa_slave_port_vlan_dump(dev,
515 SWITCHDEV_OBJ_PORT_VLAN(obj),
516 cb);
517 break;
518 default:
519 err = -EOPNOTSUPP;
520 break;
521 }
522
523 return err;
524 }
525
526 static int dsa_slave_bridge_port_join(struct net_device *dev,
527 struct net_device *br)
528 {
529 struct dsa_slave_priv *p = netdev_priv(dev);
530 struct dsa_switch *ds = p->parent;
531 int ret = -EOPNOTSUPP;
532
533 p->bridge_dev = br;
534
535 if (ds->drv->port_join_bridge)
536 ret = ds->drv->port_join_bridge(ds, p->port,
537 dsa_slave_br_port_mask(ds, br));
538
539 return ret;
540 }
541
542 static int dsa_slave_bridge_port_leave(struct net_device *dev)
543 {
544 struct dsa_slave_priv *p = netdev_priv(dev);
545 struct dsa_switch *ds = p->parent;
546 int ret = -EOPNOTSUPP;
547
548
549 if (ds->drv->port_leave_bridge)
550 ret = ds->drv->port_leave_bridge(ds, p->port,
551 dsa_slave_br_port_mask(ds, p->bridge_dev));
552
553 p->bridge_dev = NULL;
554
555 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
556 * so allow it to be in BR_STATE_FORWARDING to be kept functional
557 */
558 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
559
560 return ret;
561 }
562
563 static int dsa_slave_port_attr_get(struct net_device *dev,
564 struct switchdev_attr *attr)
565 {
566 struct dsa_slave_priv *p = netdev_priv(dev);
567 struct dsa_switch *ds = p->parent;
568
569 switch (attr->id) {
570 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
571 attr->u.ppid.id_len = sizeof(ds->index);
572 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
573 break;
574 default:
575 return -EOPNOTSUPP;
576 }
577
578 return 0;
579 }
580
581 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
582 struct sk_buff *skb)
583 {
584 #ifdef CONFIG_NET_POLL_CONTROLLER
585 if (p->netpoll)
586 netpoll_send_skb(p->netpoll, skb);
587 #else
588 BUG();
589 #endif
590 return NETDEV_TX_OK;
591 }
592
593 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
594 {
595 struct dsa_slave_priv *p = netdev_priv(dev);
596 struct sk_buff *nskb;
597
598 dev->stats.tx_packets++;
599 dev->stats.tx_bytes += skb->len;
600
601 /* Transmit function may have to reallocate the original SKB */
602 nskb = p->xmit(skb, dev);
603 if (!nskb)
604 return NETDEV_TX_OK;
605
606 /* SKB for netpoll still need to be mangled with the protocol-specific
607 * tag to be successfully transmitted
608 */
609 if (unlikely(netpoll_tx_running(dev)))
610 return dsa_netpoll_send_skb(p, nskb);
611
612 /* Queue the SKB for transmission on the parent interface, but
613 * do not modify its EtherType
614 */
615 nskb->dev = p->parent->dst->master_netdev;
616 dev_queue_xmit(nskb);
617
618 return NETDEV_TX_OK;
619 }
620
621 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
622 struct net_device *dev)
623 {
624 /* Just return the original SKB */
625 return skb;
626 }
627
628
629 /* ethtool operations *******************************************************/
630 static int
631 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
632 {
633 struct dsa_slave_priv *p = netdev_priv(dev);
634 int err;
635
636 err = -EOPNOTSUPP;
637 if (p->phy != NULL) {
638 err = phy_read_status(p->phy);
639 if (err == 0)
640 err = phy_ethtool_gset(p->phy, cmd);
641 }
642
643 return err;
644 }
645
646 static int
647 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
648 {
649 struct dsa_slave_priv *p = netdev_priv(dev);
650
651 if (p->phy != NULL)
652 return phy_ethtool_sset(p->phy, cmd);
653
654 return -EOPNOTSUPP;
655 }
656
657 static void dsa_slave_get_drvinfo(struct net_device *dev,
658 struct ethtool_drvinfo *drvinfo)
659 {
660 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
661 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
662 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
663 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
664 }
665
666 static int dsa_slave_get_regs_len(struct net_device *dev)
667 {
668 struct dsa_slave_priv *p = netdev_priv(dev);
669 struct dsa_switch *ds = p->parent;
670
671 if (ds->drv->get_regs_len)
672 return ds->drv->get_regs_len(ds, p->port);
673
674 return -EOPNOTSUPP;
675 }
676
677 static void
678 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
679 {
680 struct dsa_slave_priv *p = netdev_priv(dev);
681 struct dsa_switch *ds = p->parent;
682
683 if (ds->drv->get_regs)
684 ds->drv->get_regs(ds, p->port, regs, _p);
685 }
686
687 static int dsa_slave_nway_reset(struct net_device *dev)
688 {
689 struct dsa_slave_priv *p = netdev_priv(dev);
690
691 if (p->phy != NULL)
692 return genphy_restart_aneg(p->phy);
693
694 return -EOPNOTSUPP;
695 }
696
697 static u32 dsa_slave_get_link(struct net_device *dev)
698 {
699 struct dsa_slave_priv *p = netdev_priv(dev);
700
701 if (p->phy != NULL) {
702 genphy_update_link(p->phy);
703 return p->phy->link;
704 }
705
706 return -EOPNOTSUPP;
707 }
708
709 static int dsa_slave_get_eeprom_len(struct net_device *dev)
710 {
711 struct dsa_slave_priv *p = netdev_priv(dev);
712 struct dsa_switch *ds = p->parent;
713
714 if (ds->pd->eeprom_len)
715 return ds->pd->eeprom_len;
716
717 if (ds->drv->get_eeprom_len)
718 return ds->drv->get_eeprom_len(ds);
719
720 return 0;
721 }
722
723 static int dsa_slave_get_eeprom(struct net_device *dev,
724 struct ethtool_eeprom *eeprom, u8 *data)
725 {
726 struct dsa_slave_priv *p = netdev_priv(dev);
727 struct dsa_switch *ds = p->parent;
728
729 if (ds->drv->get_eeprom)
730 return ds->drv->get_eeprom(ds, eeprom, data);
731
732 return -EOPNOTSUPP;
733 }
734
735 static int dsa_slave_set_eeprom(struct net_device *dev,
736 struct ethtool_eeprom *eeprom, u8 *data)
737 {
738 struct dsa_slave_priv *p = netdev_priv(dev);
739 struct dsa_switch *ds = p->parent;
740
741 if (ds->drv->set_eeprom)
742 return ds->drv->set_eeprom(ds, eeprom, data);
743
744 return -EOPNOTSUPP;
745 }
746
747 static void dsa_slave_get_strings(struct net_device *dev,
748 uint32_t stringset, uint8_t *data)
749 {
750 struct dsa_slave_priv *p = netdev_priv(dev);
751 struct dsa_switch *ds = p->parent;
752
753 if (stringset == ETH_SS_STATS) {
754 int len = ETH_GSTRING_LEN;
755
756 strncpy(data, "tx_packets", len);
757 strncpy(data + len, "tx_bytes", len);
758 strncpy(data + 2 * len, "rx_packets", len);
759 strncpy(data + 3 * len, "rx_bytes", len);
760 if (ds->drv->get_strings != NULL)
761 ds->drv->get_strings(ds, p->port, data + 4 * len);
762 }
763 }
764
765 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
766 struct ethtool_stats *stats,
767 uint64_t *data)
768 {
769 struct dsa_slave_priv *p = netdev_priv(dev);
770 struct dsa_switch *ds = p->parent;
771
772 data[0] = p->dev->stats.tx_packets;
773 data[1] = p->dev->stats.tx_bytes;
774 data[2] = p->dev->stats.rx_packets;
775 data[3] = p->dev->stats.rx_bytes;
776 if (ds->drv->get_ethtool_stats != NULL)
777 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
778 }
779
780 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
781 {
782 struct dsa_slave_priv *p = netdev_priv(dev);
783 struct dsa_switch *ds = p->parent;
784
785 if (sset == ETH_SS_STATS) {
786 int count;
787
788 count = 4;
789 if (ds->drv->get_sset_count != NULL)
790 count += ds->drv->get_sset_count(ds);
791
792 return count;
793 }
794
795 return -EOPNOTSUPP;
796 }
797
798 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
799 {
800 struct dsa_slave_priv *p = netdev_priv(dev);
801 struct dsa_switch *ds = p->parent;
802
803 if (ds->drv->get_wol)
804 ds->drv->get_wol(ds, p->port, w);
805 }
806
807 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
808 {
809 struct dsa_slave_priv *p = netdev_priv(dev);
810 struct dsa_switch *ds = p->parent;
811 int ret = -EOPNOTSUPP;
812
813 if (ds->drv->set_wol)
814 ret = ds->drv->set_wol(ds, p->port, w);
815
816 return ret;
817 }
818
819 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
820 {
821 struct dsa_slave_priv *p = netdev_priv(dev);
822 struct dsa_switch *ds = p->parent;
823 int ret;
824
825 if (!ds->drv->set_eee)
826 return -EOPNOTSUPP;
827
828 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
829 if (ret)
830 return ret;
831
832 if (p->phy)
833 ret = phy_ethtool_set_eee(p->phy, e);
834
835 return ret;
836 }
837
838 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
839 {
840 struct dsa_slave_priv *p = netdev_priv(dev);
841 struct dsa_switch *ds = p->parent;
842 int ret;
843
844 if (!ds->drv->get_eee)
845 return -EOPNOTSUPP;
846
847 ret = ds->drv->get_eee(ds, p->port, e);
848 if (ret)
849 return ret;
850
851 if (p->phy)
852 ret = phy_ethtool_get_eee(p->phy, e);
853
854 return ret;
855 }
856
857 #ifdef CONFIG_NET_POLL_CONTROLLER
858 static int dsa_slave_netpoll_setup(struct net_device *dev,
859 struct netpoll_info *ni)
860 {
861 struct dsa_slave_priv *p = netdev_priv(dev);
862 struct dsa_switch *ds = p->parent;
863 struct net_device *master = ds->dst->master_netdev;
864 struct netpoll *netpoll;
865 int err = 0;
866
867 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
868 if (!netpoll)
869 return -ENOMEM;
870
871 err = __netpoll_setup(netpoll, master);
872 if (err) {
873 kfree(netpoll);
874 goto out;
875 }
876
877 p->netpoll = netpoll;
878 out:
879 return err;
880 }
881
882 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
883 {
884 struct dsa_slave_priv *p = netdev_priv(dev);
885 struct netpoll *netpoll = p->netpoll;
886
887 if (!netpoll)
888 return;
889
890 p->netpoll = NULL;
891
892 __netpoll_free_async(netpoll);
893 }
894
895 static void dsa_slave_poll_controller(struct net_device *dev)
896 {
897 }
898 #endif
899
900 static const struct ethtool_ops dsa_slave_ethtool_ops = {
901 .get_settings = dsa_slave_get_settings,
902 .set_settings = dsa_slave_set_settings,
903 .get_drvinfo = dsa_slave_get_drvinfo,
904 .get_regs_len = dsa_slave_get_regs_len,
905 .get_regs = dsa_slave_get_regs,
906 .nway_reset = dsa_slave_nway_reset,
907 .get_link = dsa_slave_get_link,
908 .get_eeprom_len = dsa_slave_get_eeprom_len,
909 .get_eeprom = dsa_slave_get_eeprom,
910 .set_eeprom = dsa_slave_set_eeprom,
911 .get_strings = dsa_slave_get_strings,
912 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
913 .get_sset_count = dsa_slave_get_sset_count,
914 .set_wol = dsa_slave_set_wol,
915 .get_wol = dsa_slave_get_wol,
916 .set_eee = dsa_slave_set_eee,
917 .get_eee = dsa_slave_get_eee,
918 };
919
920 static const struct net_device_ops dsa_slave_netdev_ops = {
921 .ndo_open = dsa_slave_open,
922 .ndo_stop = dsa_slave_close,
923 .ndo_start_xmit = dsa_slave_xmit,
924 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
925 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
926 .ndo_set_mac_address = dsa_slave_set_mac_address,
927 .ndo_fdb_add = switchdev_port_fdb_add,
928 .ndo_fdb_del = switchdev_port_fdb_del,
929 .ndo_fdb_dump = switchdev_port_fdb_dump,
930 .ndo_do_ioctl = dsa_slave_ioctl,
931 .ndo_get_iflink = dsa_slave_get_iflink,
932 #ifdef CONFIG_NET_POLL_CONTROLLER
933 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
934 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
935 .ndo_poll_controller = dsa_slave_poll_controller,
936 #endif
937 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
938 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
939 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
940 };
941
942 static const struct switchdev_ops dsa_slave_switchdev_ops = {
943 .switchdev_port_attr_get = dsa_slave_port_attr_get,
944 .switchdev_port_attr_set = dsa_slave_port_attr_set,
945 .switchdev_port_obj_add = dsa_slave_port_obj_add,
946 .switchdev_port_obj_del = dsa_slave_port_obj_del,
947 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
948 };
949
950 static struct device_type dsa_type = {
951 .name = "dsa",
952 };
953
954 static void dsa_slave_adjust_link(struct net_device *dev)
955 {
956 struct dsa_slave_priv *p = netdev_priv(dev);
957 struct dsa_switch *ds = p->parent;
958 unsigned int status_changed = 0;
959
960 if (p->old_link != p->phy->link) {
961 status_changed = 1;
962 p->old_link = p->phy->link;
963 }
964
965 if (p->old_duplex != p->phy->duplex) {
966 status_changed = 1;
967 p->old_duplex = p->phy->duplex;
968 }
969
970 if (p->old_pause != p->phy->pause) {
971 status_changed = 1;
972 p->old_pause = p->phy->pause;
973 }
974
975 if (ds->drv->adjust_link && status_changed)
976 ds->drv->adjust_link(ds, p->port, p->phy);
977
978 if (status_changed)
979 phy_print_status(p->phy);
980 }
981
982 static int dsa_slave_fixed_link_update(struct net_device *dev,
983 struct fixed_phy_status *status)
984 {
985 struct dsa_slave_priv *p = netdev_priv(dev);
986 struct dsa_switch *ds = p->parent;
987
988 if (ds->drv->fixed_link_update)
989 ds->drv->fixed_link_update(ds, p->port, status);
990
991 return 0;
992 }
993
994 /* slave device setup *******************************************************/
995 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
996 struct net_device *slave_dev,
997 int addr)
998 {
999 struct dsa_switch *ds = p->parent;
1000
1001 p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr);
1002 if (!p->phy) {
1003 netdev_err(slave_dev, "no phy at %d\n", addr);
1004 return -ENODEV;
1005 }
1006
1007 /* Use already configured phy mode */
1008 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1009 p->phy_interface = p->phy->interface;
1010 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
1011 p->phy_interface);
1012
1013 return 0;
1014 }
1015
1016 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
1017 struct net_device *slave_dev)
1018 {
1019 struct dsa_switch *ds = p->parent;
1020 struct dsa_chip_data *cd = ds->pd;
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 = cd->port_dn[p->port];
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 (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 = port_dn;
1044 }
1045
1046 if (ds->drv->get_phy_flags)
1047 phy_flags = ds->drv->get_phy_flags(ds, p->port);
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 return ret;
1063 }
1064 } else {
1065 p->phy = of_phy_connect(slave_dev, phy_dn,
1066 dsa_slave_adjust_link,
1067 phy_flags,
1068 p->phy_interface);
1069 }
1070 }
1071
1072 if (p->phy && phy_is_fixed)
1073 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
1074
1075 /* We could not connect to a designated PHY, so use the switch internal
1076 * MDIO bus instead
1077 */
1078 if (!p->phy) {
1079 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
1080 if (ret) {
1081 netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret);
1082 return ret;
1083 }
1084 }
1085
1086 phy_attached_info(p->phy);
1087
1088 return 0;
1089 }
1090
1091 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1092 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1093 struct netdev_queue *txq,
1094 void *_unused)
1095 {
1096 lockdep_set_class(&txq->_xmit_lock,
1097 &dsa_slave_netdev_xmit_lock_key);
1098 }
1099
1100 int dsa_slave_suspend(struct net_device *slave_dev)
1101 {
1102 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1103
1104 if (p->phy) {
1105 phy_stop(p->phy);
1106 p->old_pause = -1;
1107 p->old_link = -1;
1108 p->old_duplex = -1;
1109 phy_suspend(p->phy);
1110 }
1111
1112 return 0;
1113 }
1114
1115 int dsa_slave_resume(struct net_device *slave_dev)
1116 {
1117 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1118
1119 netif_device_attach(slave_dev);
1120
1121 if (p->phy) {
1122 phy_resume(p->phy);
1123 phy_start(p->phy);
1124 }
1125
1126 return 0;
1127 }
1128
1129 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1130 int port, char *name)
1131 {
1132 struct net_device *master = ds->dst->master_netdev;
1133 struct net_device *slave_dev;
1134 struct dsa_slave_priv *p;
1135 int ret;
1136
1137 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1138 NET_NAME_UNKNOWN, ether_setup);
1139 if (slave_dev == NULL)
1140 return -ENOMEM;
1141
1142 slave_dev->features = master->vlan_features;
1143 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1144 eth_hw_addr_inherit(slave_dev, master);
1145 slave_dev->priv_flags |= IFF_NO_QUEUE;
1146 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1147 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1148 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1149
1150 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1151 NULL);
1152
1153 SET_NETDEV_DEV(slave_dev, parent);
1154 slave_dev->dev.of_node = ds->pd->port_dn[port];
1155 slave_dev->vlan_features = master->vlan_features;
1156
1157 p = netdev_priv(slave_dev);
1158 p->dev = slave_dev;
1159 p->parent = ds;
1160 p->port = port;
1161
1162 switch (ds->dst->tag_protocol) {
1163 #ifdef CONFIG_NET_DSA_TAG_DSA
1164 case DSA_TAG_PROTO_DSA:
1165 p->xmit = dsa_netdev_ops.xmit;
1166 break;
1167 #endif
1168 #ifdef CONFIG_NET_DSA_TAG_EDSA
1169 case DSA_TAG_PROTO_EDSA:
1170 p->xmit = edsa_netdev_ops.xmit;
1171 break;
1172 #endif
1173 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1174 case DSA_TAG_PROTO_TRAILER:
1175 p->xmit = trailer_netdev_ops.xmit;
1176 break;
1177 #endif
1178 #ifdef CONFIG_NET_DSA_TAG_BRCM
1179 case DSA_TAG_PROTO_BRCM:
1180 p->xmit = brcm_netdev_ops.xmit;
1181 break;
1182 #endif
1183 default:
1184 p->xmit = dsa_slave_notag_xmit;
1185 break;
1186 }
1187
1188 p->old_pause = -1;
1189 p->old_link = -1;
1190 p->old_duplex = -1;
1191
1192 ds->ports[port] = slave_dev;
1193 ret = register_netdev(slave_dev);
1194 if (ret) {
1195 netdev_err(master, "error %d registering interface %s\n",
1196 ret, slave_dev->name);
1197 phy_disconnect(p->phy);
1198 ds->ports[port] = NULL;
1199 free_netdev(slave_dev);
1200 return ret;
1201 }
1202
1203 netif_carrier_off(slave_dev);
1204
1205 ret = dsa_slave_phy_setup(p, slave_dev);
1206 if (ret) {
1207 netdev_err(master, "error %d setting up slave phy\n", ret);
1208 free_netdev(slave_dev);
1209 return ret;
1210 }
1211
1212 return 0;
1213 }
1214
1215 void dsa_slave_destroy(struct net_device *slave_dev)
1216 {
1217 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1218
1219 netif_carrier_off(slave_dev);
1220 if (p->phy)
1221 phy_disconnect(p->phy);
1222 unregister_netdev(slave_dev);
1223 free_netdev(slave_dev);
1224 }
1225
1226 static bool dsa_slave_dev_check(struct net_device *dev)
1227 {
1228 return dev->netdev_ops == &dsa_slave_netdev_ops;
1229 }
1230
1231 static int dsa_slave_master_changed(struct net_device *dev)
1232 {
1233 struct net_device *master = netdev_master_upper_dev_get(dev);
1234 struct dsa_slave_priv *p = netdev_priv(dev);
1235 int err = 0;
1236
1237 if (master && master->rtnl_link_ops &&
1238 !strcmp(master->rtnl_link_ops->kind, "bridge"))
1239 err = dsa_slave_bridge_port_join(dev, master);
1240 else if (dsa_port_is_bridged(p))
1241 err = dsa_slave_bridge_port_leave(dev);
1242
1243 return err;
1244 }
1245
1246 int dsa_slave_netdevice_event(struct notifier_block *unused,
1247 unsigned long event, void *ptr)
1248 {
1249 struct net_device *dev;
1250 int err = 0;
1251
1252 switch (event) {
1253 case NETDEV_CHANGEUPPER:
1254 dev = netdev_notifier_info_to_dev(ptr);
1255 if (!dsa_slave_dev_check(dev))
1256 goto out;
1257
1258 err = dsa_slave_master_changed(dev);
1259 if (err && err != -EOPNOTSUPP)
1260 netdev_warn(dev, "failed to reflect master change\n");
1261
1262 break;
1263 }
1264
1265 out:
1266 return NOTIFY_DONE;
1267 }
Linux kernel - Deliverables
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