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[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 <net/rtnetlink.h>
19 #include <net/switchdev.h>
20 #include <linux/if_bridge.h>
21 #include <linux/netpoll.h>
22 #include "dsa_priv.h"
23
24 /* slave mii_bus handling ***************************************************/
25 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
26 {
27 struct dsa_switch *ds = bus->priv;
28
29 if (ds->phys_mii_mask & (1 << addr))
30 return ds->drv->phy_read(ds, addr, reg);
31
32 return 0xffff;
33 }
34
35 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
36 {
37 struct dsa_switch *ds = bus->priv;
38
39 if (ds->phys_mii_mask & (1 << addr))
40 return ds->drv->phy_write(ds, addr, reg, val);
41
42 return 0;
43 }
44
45 void dsa_slave_mii_bus_init(struct dsa_switch *ds)
46 {
47 ds->slave_mii_bus->priv = (void *)ds;
48 ds->slave_mii_bus->name = "dsa slave smi";
49 ds->slave_mii_bus->read = dsa_slave_phy_read;
50 ds->slave_mii_bus->write = dsa_slave_phy_write;
51 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x",
52 ds->index, ds->pd->sw_addr);
53 ds->slave_mii_bus->parent = ds->master_dev;
54 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
55 }
56
57
58 /* slave device handling ****************************************************/
59 static int dsa_slave_get_iflink(const struct net_device *dev)
60 {
61 struct dsa_slave_priv *p = netdev_priv(dev);
62
63 return p->parent->dst->master_netdev->ifindex;
64 }
65
66 static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p)
67 {
68 return !!p->bridge_dev;
69 }
70
71 static int dsa_slave_open(struct net_device *dev)
72 {
73 struct dsa_slave_priv *p = netdev_priv(dev);
74 struct net_device *master = p->parent->dst->master_netdev;
75 struct dsa_switch *ds = p->parent;
76 u8 stp_state = dsa_port_is_bridged(p) ?
77 BR_STATE_BLOCKING : BR_STATE_FORWARDING;
78 int err;
79
80 if (!(master->flags & IFF_UP))
81 return -ENETDOWN;
82
83 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
84 err = dev_uc_add(master, dev->dev_addr);
85 if (err < 0)
86 goto out;
87 }
88
89 if (dev->flags & IFF_ALLMULTI) {
90 err = dev_set_allmulti(master, 1);
91 if (err < 0)
92 goto del_unicast;
93 }
94 if (dev->flags & IFF_PROMISC) {
95 err = dev_set_promiscuity(master, 1);
96 if (err < 0)
97 goto clear_allmulti;
98 }
99
100 if (ds->drv->port_enable) {
101 err = ds->drv->port_enable(ds, p->port, p->phy);
102 if (err)
103 goto clear_promisc;
104 }
105
106 if (ds->drv->port_stp_update)
107 ds->drv->port_stp_update(ds, p->port, 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 = p->parent->dst->master_netdev;
131 struct dsa_switch *ds = p->parent;
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->drv->port_disable)
147 ds->drv->port_disable(ds, p->port, p->phy);
148
149 if (ds->drv->port_stp_update)
150 ds->drv->port_stp_update(ds, p->port, BR_STATE_DISABLED);
151
152 return 0;
153 }
154
155 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
156 {
157 struct dsa_slave_priv *p = netdev_priv(dev);
158 struct net_device *master = p->parent->dst->master_netdev;
159
160 if (change & IFF_ALLMULTI)
161 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
162 if (change & IFF_PROMISC)
163 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
164 }
165
166 static void dsa_slave_set_rx_mode(struct net_device *dev)
167 {
168 struct dsa_slave_priv *p = netdev_priv(dev);
169 struct net_device *master = p->parent->dst->master_netdev;
170
171 dev_mc_sync(master, dev);
172 dev_uc_sync(master, dev);
173 }
174
175 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
176 {
177 struct dsa_slave_priv *p = netdev_priv(dev);
178 struct net_device *master = p->parent->dst->master_netdev;
179 struct sockaddr *addr = a;
180 int err;
181
182 if (!is_valid_ether_addr(addr->sa_data))
183 return -EADDRNOTAVAIL;
184
185 if (!(dev->flags & IFF_UP))
186 goto out;
187
188 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
189 err = dev_uc_add(master, addr->sa_data);
190 if (err < 0)
191 return err;
192 }
193
194 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
195 dev_uc_del(master, dev->dev_addr);
196
197 out:
198 ether_addr_copy(dev->dev_addr, addr->sa_data);
199
200 return 0;
201 }
202
203 static int dsa_bridge_check_vlan_range(struct dsa_switch *ds,
204 const struct net_device *bridge,
205 u16 vid_begin, u16 vid_end)
206 {
207 struct dsa_slave_priv *p;
208 struct net_device *dev, *vlan_br;
209 DECLARE_BITMAP(members, DSA_MAX_PORTS);
210 DECLARE_BITMAP(untagged, DSA_MAX_PORTS);
211 u16 vid;
212 int member, err;
213
214 if (!ds->drv->vlan_getnext || !vid_begin)
215 return -EOPNOTSUPP;
216
217 vid = vid_begin - 1;
218
219 do {
220 err = ds->drv->vlan_getnext(ds, &vid, members, untagged);
221 if (err)
222 break;
223
224 if (vid > vid_end)
225 break;
226
227 member = find_first_bit(members, DSA_MAX_PORTS);
228 if (member == DSA_MAX_PORTS)
229 continue;
230
231 dev = ds->ports[member];
232 p = netdev_priv(dev);
233 vlan_br = p->bridge_dev;
234 if (vlan_br == bridge)
235 continue;
236
237 netdev_dbg(vlan_br, "hardware VLAN %d already in use\n", vid);
238 return -EOPNOTSUPP;
239 } while (vid < vid_end);
240
241 return err == -ENOENT ? 0 : err;
242 }
243
244 static int dsa_slave_port_vlan_add(struct net_device *dev,
245 const struct switchdev_obj_port_vlan *vlan,
246 struct switchdev_trans *trans)
247 {
248 struct dsa_slave_priv *p = netdev_priv(dev);
249 struct dsa_switch *ds = p->parent;
250 u16 vid;
251 int err;
252
253 if (switchdev_trans_ph_prepare(trans)) {
254 if (!ds->drv->port_vlan_add || !ds->drv->port_pvid_set)
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 } else {
266 for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
267 err = ds->drv->port_vlan_add(ds, p->port, vid,
268 vlan->flags &
269 BRIDGE_VLAN_INFO_UNTAGGED);
270 if (!err && vlan->flags & BRIDGE_VLAN_INFO_PVID)
271 err = ds->drv->port_pvid_set(ds, p->port, vid);
272 if (err)
273 return err;
274 }
275 }
276
277 return 0;
278 }
279
280 static int dsa_slave_port_vlan_del(struct net_device *dev,
281 const struct switchdev_obj_port_vlan *vlan)
282 {
283 struct dsa_slave_priv *p = netdev_priv(dev);
284 struct dsa_switch *ds = p->parent;
285 u16 vid;
286 int err;
287
288 if (!ds->drv->port_vlan_del)
289 return -EOPNOTSUPP;
290
291 for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
292 err = ds->drv->port_vlan_del(ds, p->port, vid);
293 if (err)
294 return err;
295 }
296
297 return 0;
298 }
299
300 static int dsa_slave_port_vlan_dump(struct net_device *dev,
301 struct switchdev_obj_port_vlan *vlan,
302 switchdev_obj_dump_cb_t *cb)
303 {
304 struct dsa_slave_priv *p = netdev_priv(dev);
305 struct dsa_switch *ds = p->parent;
306 DECLARE_BITMAP(members, DSA_MAX_PORTS);
307 DECLARE_BITMAP(untagged, DSA_MAX_PORTS);
308 u16 pvid, vid = 0;
309 int err;
310
311 if (!ds->drv->vlan_getnext || !ds->drv->port_pvid_get)
312 return -EOPNOTSUPP;
313
314 err = ds->drv->port_pvid_get(ds, p->port, &pvid);
315 if (err)
316 return err;
317
318 for (;;) {
319 err = ds->drv->vlan_getnext(ds, &vid, members, untagged);
320 if (err)
321 break;
322
323 if (!test_bit(p->port, members))
324 continue;
325
326 memset(vlan, 0, sizeof(*vlan));
327 vlan->vid_begin = vlan->vid_end = vid;
328
329 if (vid == pvid)
330 vlan->flags |= BRIDGE_VLAN_INFO_PVID;
331
332 if (test_bit(p->port, untagged))
333 vlan->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
334
335 err = cb(&vlan->obj);
336 if (err)
337 break;
338 }
339
340 return err == -ENOENT ? 0 : err;
341 }
342
343 static int dsa_slave_port_fdb_add(struct net_device *dev,
344 const struct switchdev_obj_port_fdb *fdb,
345 struct switchdev_trans *trans)
346 {
347 struct dsa_slave_priv *p = netdev_priv(dev);
348 struct dsa_switch *ds = p->parent;
349 int ret;
350
351 if (!ds->drv->port_fdb_prepare || !ds->drv->port_fdb_add)
352 return -EOPNOTSUPP;
353
354 if (switchdev_trans_ph_prepare(trans))
355 ret = ds->drv->port_fdb_prepare(ds, p->port, fdb, trans);
356 else
357 ret = ds->drv->port_fdb_add(ds, p->port, fdb, trans);
358
359 return ret;
360 }
361
362 static int dsa_slave_port_fdb_del(struct net_device *dev,
363 const struct switchdev_obj_port_fdb *fdb)
364 {
365 struct dsa_slave_priv *p = netdev_priv(dev);
366 struct dsa_switch *ds = p->parent;
367 int ret = -EOPNOTSUPP;
368
369 if (ds->drv->port_fdb_del)
370 ret = ds->drv->port_fdb_del(ds, p->port, fdb);
371
372 return ret;
373 }
374
375 static int dsa_slave_port_fdb_dump(struct net_device *dev,
376 struct switchdev_obj_port_fdb *fdb,
377 switchdev_obj_dump_cb_t *cb)
378 {
379 struct dsa_slave_priv *p = netdev_priv(dev);
380 struct dsa_switch *ds = p->parent;
381 unsigned char addr[ETH_ALEN] = { 0 };
382 u16 vid = 0;
383 int ret;
384
385 if (!ds->drv->port_fdb_getnext)
386 return -EOPNOTSUPP;
387
388 for (;;) {
389 bool is_static;
390
391 ret = ds->drv->port_fdb_getnext(ds, p->port, addr, &vid,
392 &is_static);
393 if (ret < 0)
394 break;
395
396 ether_addr_copy(fdb->addr, addr);
397 fdb->vid = vid;
398 fdb->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
399
400 ret = cb(&fdb->obj);
401 if (ret < 0)
402 break;
403 }
404
405 return ret == -ENOENT ? 0 : ret;
406 }
407
408 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
409 {
410 struct dsa_slave_priv *p = netdev_priv(dev);
411
412 if (p->phy != NULL)
413 return phy_mii_ioctl(p->phy, ifr, cmd);
414
415 return -EOPNOTSUPP;
416 }
417
418 /* Return a bitmask of all ports being currently bridged within a given bridge
419 * device. Note that on leave, the mask will still return the bitmask of ports
420 * currently bridged, prior to port removal, and this is exactly what we want.
421 */
422 static u32 dsa_slave_br_port_mask(struct dsa_switch *ds,
423 struct net_device *bridge)
424 {
425 struct dsa_slave_priv *p;
426 unsigned int port;
427 u32 mask = 0;
428
429 for (port = 0; port < DSA_MAX_PORTS; port++) {
430 if (!dsa_is_port_initialized(ds, port))
431 continue;
432
433 p = netdev_priv(ds->ports[port]);
434
435 if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT &&
436 p->bridge_dev == bridge)
437 mask |= 1 << port;
438 }
439
440 return mask;
441 }
442
443 static int dsa_slave_stp_update(struct net_device *dev, u8 state)
444 {
445 struct dsa_slave_priv *p = netdev_priv(dev);
446 struct dsa_switch *ds = p->parent;
447 int ret = -EOPNOTSUPP;
448
449 if (ds->drv->port_stp_update)
450 ret = ds->drv->port_stp_update(ds, p->port, state);
451
452 return ret;
453 }
454
455 static int dsa_slave_port_attr_set(struct net_device *dev,
456 const struct switchdev_attr *attr,
457 struct switchdev_trans *trans)
458 {
459 struct dsa_slave_priv *p = netdev_priv(dev);
460 struct dsa_switch *ds = p->parent;
461 int ret;
462
463 switch (attr->id) {
464 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
465 if (switchdev_trans_ph_prepare(trans))
466 ret = ds->drv->port_stp_update ? 0 : -EOPNOTSUPP;
467 else
468 ret = ds->drv->port_stp_update(ds, p->port,
469 attr->u.stp_state);
470 break;
471 default:
472 ret = -EOPNOTSUPP;
473 break;
474 }
475
476 return ret;
477 }
478
479 static int dsa_slave_port_obj_add(struct net_device *dev,
480 const struct switchdev_obj *obj,
481 struct switchdev_trans *trans)
482 {
483 int err;
484
485 /* For the prepare phase, ensure the full set of changes is feasable in
486 * one go in order to signal a failure properly. If an operation is not
487 * supported, return -EOPNOTSUPP.
488 */
489
490 switch (obj->id) {
491 case SWITCHDEV_OBJ_ID_PORT_FDB:
492 err = dsa_slave_port_fdb_add(dev,
493 SWITCHDEV_OBJ_PORT_FDB(obj),
494 trans);
495 break;
496 case SWITCHDEV_OBJ_ID_PORT_VLAN:
497 err = dsa_slave_port_vlan_add(dev,
498 SWITCHDEV_OBJ_PORT_VLAN(obj),
499 trans);
500 break;
501 default:
502 err = -EOPNOTSUPP;
503 break;
504 }
505
506 return err;
507 }
508
509 static int dsa_slave_port_obj_del(struct net_device *dev,
510 const struct switchdev_obj *obj)
511 {
512 int err;
513
514 switch (obj->id) {
515 case SWITCHDEV_OBJ_ID_PORT_FDB:
516 err = dsa_slave_port_fdb_del(dev,
517 SWITCHDEV_OBJ_PORT_FDB(obj));
518 break;
519 case SWITCHDEV_OBJ_ID_PORT_VLAN:
520 err = dsa_slave_port_vlan_del(dev,
521 SWITCHDEV_OBJ_PORT_VLAN(obj));
522 break;
523 default:
524 err = -EOPNOTSUPP;
525 break;
526 }
527
528 return err;
529 }
530
531 static int dsa_slave_port_obj_dump(struct net_device *dev,
532 struct switchdev_obj *obj,
533 switchdev_obj_dump_cb_t *cb)
534 {
535 int err;
536
537 switch (obj->id) {
538 case SWITCHDEV_OBJ_ID_PORT_FDB:
539 err = dsa_slave_port_fdb_dump(dev,
540 SWITCHDEV_OBJ_PORT_FDB(obj),
541 cb);
542 break;
543 case SWITCHDEV_OBJ_ID_PORT_VLAN:
544 err = dsa_slave_port_vlan_dump(dev,
545 SWITCHDEV_OBJ_PORT_VLAN(obj),
546 cb);
547 break;
548 default:
549 err = -EOPNOTSUPP;
550 break;
551 }
552
553 return err;
554 }
555
556 static int dsa_slave_bridge_port_join(struct net_device *dev,
557 struct net_device *br)
558 {
559 struct dsa_slave_priv *p = netdev_priv(dev);
560 struct dsa_switch *ds = p->parent;
561 int ret = -EOPNOTSUPP;
562
563 p->bridge_dev = br;
564
565 if (ds->drv->port_join_bridge)
566 ret = ds->drv->port_join_bridge(ds, p->port,
567 dsa_slave_br_port_mask(ds, br));
568
569 return ret;
570 }
571
572 static int dsa_slave_bridge_port_leave(struct net_device *dev)
573 {
574 struct dsa_slave_priv *p = netdev_priv(dev);
575 struct dsa_switch *ds = p->parent;
576 int ret = -EOPNOTSUPP;
577
578
579 if (ds->drv->port_leave_bridge)
580 ret = ds->drv->port_leave_bridge(ds, p->port,
581 dsa_slave_br_port_mask(ds, p->bridge_dev));
582
583 p->bridge_dev = NULL;
584
585 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
586 * so allow it to be in BR_STATE_FORWARDING to be kept functional
587 */
588 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
589
590 return ret;
591 }
592
593 static int dsa_slave_port_attr_get(struct net_device *dev,
594 struct switchdev_attr *attr)
595 {
596 struct dsa_slave_priv *p = netdev_priv(dev);
597 struct dsa_switch *ds = p->parent;
598
599 switch (attr->id) {
600 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
601 attr->u.ppid.id_len = sizeof(ds->index);
602 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
603 break;
604 default:
605 return -EOPNOTSUPP;
606 }
607
608 return 0;
609 }
610
611 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
612 struct sk_buff *skb)
613 {
614 #ifdef CONFIG_NET_POLL_CONTROLLER
615 if (p->netpoll)
616 netpoll_send_skb(p->netpoll, skb);
617 #else
618 BUG();
619 #endif
620 return NETDEV_TX_OK;
621 }
622
623 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
624 {
625 struct dsa_slave_priv *p = netdev_priv(dev);
626 struct sk_buff *nskb;
627
628 dev->stats.tx_packets++;
629 dev->stats.tx_bytes += skb->len;
630
631 /* Transmit function may have to reallocate the original SKB */
632 nskb = p->xmit(skb, dev);
633 if (!nskb)
634 return NETDEV_TX_OK;
635
636 /* SKB for netpoll still need to be mangled with the protocol-specific
637 * tag to be successfully transmitted
638 */
639 if (unlikely(netpoll_tx_running(dev)))
640 return dsa_netpoll_send_skb(p, nskb);
641
642 /* Queue the SKB for transmission on the parent interface, but
643 * do not modify its EtherType
644 */
645 nskb->dev = p->parent->dst->master_netdev;
646 dev_queue_xmit(nskb);
647
648 return NETDEV_TX_OK;
649 }
650
651 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
652 struct net_device *dev)
653 {
654 /* Just return the original SKB */
655 return skb;
656 }
657
658
659 /* ethtool operations *******************************************************/
660 static int
661 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
662 {
663 struct dsa_slave_priv *p = netdev_priv(dev);
664 int err;
665
666 err = -EOPNOTSUPP;
667 if (p->phy != NULL) {
668 err = phy_read_status(p->phy);
669 if (err == 0)
670 err = phy_ethtool_gset(p->phy, cmd);
671 }
672
673 return err;
674 }
675
676 static int
677 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
678 {
679 struct dsa_slave_priv *p = netdev_priv(dev);
680
681 if (p->phy != NULL)
682 return phy_ethtool_sset(p->phy, cmd);
683
684 return -EOPNOTSUPP;
685 }
686
687 static void dsa_slave_get_drvinfo(struct net_device *dev,
688 struct ethtool_drvinfo *drvinfo)
689 {
690 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
691 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
692 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
693 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
694 }
695
696 static int dsa_slave_get_regs_len(struct net_device *dev)
697 {
698 struct dsa_slave_priv *p = netdev_priv(dev);
699 struct dsa_switch *ds = p->parent;
700
701 if (ds->drv->get_regs_len)
702 return ds->drv->get_regs_len(ds, p->port);
703
704 return -EOPNOTSUPP;
705 }
706
707 static void
708 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
709 {
710 struct dsa_slave_priv *p = netdev_priv(dev);
711 struct dsa_switch *ds = p->parent;
712
713 if (ds->drv->get_regs)
714 ds->drv->get_regs(ds, p->port, regs, _p);
715 }
716
717 static int dsa_slave_nway_reset(struct net_device *dev)
718 {
719 struct dsa_slave_priv *p = netdev_priv(dev);
720
721 if (p->phy != NULL)
722 return genphy_restart_aneg(p->phy);
723
724 return -EOPNOTSUPP;
725 }
726
727 static u32 dsa_slave_get_link(struct net_device *dev)
728 {
729 struct dsa_slave_priv *p = netdev_priv(dev);
730
731 if (p->phy != NULL) {
732 genphy_update_link(p->phy);
733 return p->phy->link;
734 }
735
736 return -EOPNOTSUPP;
737 }
738
739 static int dsa_slave_get_eeprom_len(struct net_device *dev)
740 {
741 struct dsa_slave_priv *p = netdev_priv(dev);
742 struct dsa_switch *ds = p->parent;
743
744 if (ds->pd->eeprom_len)
745 return ds->pd->eeprom_len;
746
747 if (ds->drv->get_eeprom_len)
748 return ds->drv->get_eeprom_len(ds);
749
750 return 0;
751 }
752
753 static int dsa_slave_get_eeprom(struct net_device *dev,
754 struct ethtool_eeprom *eeprom, u8 *data)
755 {
756 struct dsa_slave_priv *p = netdev_priv(dev);
757 struct dsa_switch *ds = p->parent;
758
759 if (ds->drv->get_eeprom)
760 return ds->drv->get_eeprom(ds, eeprom, data);
761
762 return -EOPNOTSUPP;
763 }
764
765 static int dsa_slave_set_eeprom(struct net_device *dev,
766 struct ethtool_eeprom *eeprom, u8 *data)
767 {
768 struct dsa_slave_priv *p = netdev_priv(dev);
769 struct dsa_switch *ds = p->parent;
770
771 if (ds->drv->set_eeprom)
772 return ds->drv->set_eeprom(ds, eeprom, data);
773
774 return -EOPNOTSUPP;
775 }
776
777 static void dsa_slave_get_strings(struct net_device *dev,
778 uint32_t stringset, uint8_t *data)
779 {
780 struct dsa_slave_priv *p = netdev_priv(dev);
781 struct dsa_switch *ds = p->parent;
782
783 if (stringset == ETH_SS_STATS) {
784 int len = ETH_GSTRING_LEN;
785
786 strncpy(data, "tx_packets", len);
787 strncpy(data + len, "tx_bytes", len);
788 strncpy(data + 2 * len, "rx_packets", len);
789 strncpy(data + 3 * len, "rx_bytes", len);
790 if (ds->drv->get_strings != NULL)
791 ds->drv->get_strings(ds, p->port, data + 4 * len);
792 }
793 }
794
795 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
796 struct ethtool_stats *stats,
797 uint64_t *data)
798 {
799 struct dsa_slave_priv *p = netdev_priv(dev);
800 struct dsa_switch *ds = p->parent;
801
802 data[0] = p->dev->stats.tx_packets;
803 data[1] = p->dev->stats.tx_bytes;
804 data[2] = p->dev->stats.rx_packets;
805 data[3] = p->dev->stats.rx_bytes;
806 if (ds->drv->get_ethtool_stats != NULL)
807 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
808 }
809
810 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
811 {
812 struct dsa_slave_priv *p = netdev_priv(dev);
813 struct dsa_switch *ds = p->parent;
814
815 if (sset == ETH_SS_STATS) {
816 int count;
817
818 count = 4;
819 if (ds->drv->get_sset_count != NULL)
820 count += ds->drv->get_sset_count(ds);
821
822 return count;
823 }
824
825 return -EOPNOTSUPP;
826 }
827
828 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
829 {
830 struct dsa_slave_priv *p = netdev_priv(dev);
831 struct dsa_switch *ds = p->parent;
832
833 if (ds->drv->get_wol)
834 ds->drv->get_wol(ds, p->port, w);
835 }
836
837 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
838 {
839 struct dsa_slave_priv *p = netdev_priv(dev);
840 struct dsa_switch *ds = p->parent;
841 int ret = -EOPNOTSUPP;
842
843 if (ds->drv->set_wol)
844 ret = ds->drv->set_wol(ds, p->port, w);
845
846 return ret;
847 }
848
849 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
850 {
851 struct dsa_slave_priv *p = netdev_priv(dev);
852 struct dsa_switch *ds = p->parent;
853 int ret;
854
855 if (!ds->drv->set_eee)
856 return -EOPNOTSUPP;
857
858 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
859 if (ret)
860 return ret;
861
862 if (p->phy)
863 ret = phy_ethtool_set_eee(p->phy, e);
864
865 return ret;
866 }
867
868 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
869 {
870 struct dsa_slave_priv *p = netdev_priv(dev);
871 struct dsa_switch *ds = p->parent;
872 int ret;
873
874 if (!ds->drv->get_eee)
875 return -EOPNOTSUPP;
876
877 ret = ds->drv->get_eee(ds, p->port, e);
878 if (ret)
879 return ret;
880
881 if (p->phy)
882 ret = phy_ethtool_get_eee(p->phy, e);
883
884 return ret;
885 }
886
887 #ifdef CONFIG_NET_POLL_CONTROLLER
888 static int dsa_slave_netpoll_setup(struct net_device *dev,
889 struct netpoll_info *ni)
890 {
891 struct dsa_slave_priv *p = netdev_priv(dev);
892 struct dsa_switch *ds = p->parent;
893 struct net_device *master = ds->dst->master_netdev;
894 struct netpoll *netpoll;
895 int err = 0;
896
897 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
898 if (!netpoll)
899 return -ENOMEM;
900
901 err = __netpoll_setup(netpoll, master);
902 if (err) {
903 kfree(netpoll);
904 goto out;
905 }
906
907 p->netpoll = netpoll;
908 out:
909 return err;
910 }
911
912 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
913 {
914 struct dsa_slave_priv *p = netdev_priv(dev);
915 struct netpoll *netpoll = p->netpoll;
916
917 if (!netpoll)
918 return;
919
920 p->netpoll = NULL;
921
922 __netpoll_free_async(netpoll);
923 }
924
925 static void dsa_slave_poll_controller(struct net_device *dev)
926 {
927 }
928 #endif
929
930 static const struct ethtool_ops dsa_slave_ethtool_ops = {
931 .get_settings = dsa_slave_get_settings,
932 .set_settings = dsa_slave_set_settings,
933 .get_drvinfo = dsa_slave_get_drvinfo,
934 .get_regs_len = dsa_slave_get_regs_len,
935 .get_regs = dsa_slave_get_regs,
936 .nway_reset = dsa_slave_nway_reset,
937 .get_link = dsa_slave_get_link,
938 .get_eeprom_len = dsa_slave_get_eeprom_len,
939 .get_eeprom = dsa_slave_get_eeprom,
940 .set_eeprom = dsa_slave_set_eeprom,
941 .get_strings = dsa_slave_get_strings,
942 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
943 .get_sset_count = dsa_slave_get_sset_count,
944 .set_wol = dsa_slave_set_wol,
945 .get_wol = dsa_slave_get_wol,
946 .set_eee = dsa_slave_set_eee,
947 .get_eee = dsa_slave_get_eee,
948 };
949
950 static const struct net_device_ops dsa_slave_netdev_ops = {
951 .ndo_open = dsa_slave_open,
952 .ndo_stop = dsa_slave_close,
953 .ndo_start_xmit = dsa_slave_xmit,
954 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
955 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
956 .ndo_set_mac_address = dsa_slave_set_mac_address,
957 .ndo_fdb_add = switchdev_port_fdb_add,
958 .ndo_fdb_del = switchdev_port_fdb_del,
959 .ndo_fdb_dump = switchdev_port_fdb_dump,
960 .ndo_do_ioctl = dsa_slave_ioctl,
961 .ndo_get_iflink = dsa_slave_get_iflink,
962 #ifdef CONFIG_NET_POLL_CONTROLLER
963 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
964 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
965 .ndo_poll_controller = dsa_slave_poll_controller,
966 #endif
967 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
968 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
969 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
970 };
971
972 static const struct switchdev_ops dsa_slave_switchdev_ops = {
973 .switchdev_port_attr_get = dsa_slave_port_attr_get,
974 .switchdev_port_attr_set = dsa_slave_port_attr_set,
975 .switchdev_port_obj_add = dsa_slave_port_obj_add,
976 .switchdev_port_obj_del = dsa_slave_port_obj_del,
977 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
978 };
979
980 static struct device_type dsa_type = {
981 .name = "dsa",
982 };
983
984 static void dsa_slave_adjust_link(struct net_device *dev)
985 {
986 struct dsa_slave_priv *p = netdev_priv(dev);
987 struct dsa_switch *ds = p->parent;
988 unsigned int status_changed = 0;
989
990 if (p->old_link != p->phy->link) {
991 status_changed = 1;
992 p->old_link = p->phy->link;
993 }
994
995 if (p->old_duplex != p->phy->duplex) {
996 status_changed = 1;
997 p->old_duplex = p->phy->duplex;
998 }
999
1000 if (p->old_pause != p->phy->pause) {
1001 status_changed = 1;
1002 p->old_pause = p->phy->pause;
1003 }
1004
1005 if (ds->drv->adjust_link && status_changed)
1006 ds->drv->adjust_link(ds, p->port, p->phy);
1007
1008 if (status_changed)
1009 phy_print_status(p->phy);
1010 }
1011
1012 static int dsa_slave_fixed_link_update(struct net_device *dev,
1013 struct fixed_phy_status *status)
1014 {
1015 struct dsa_slave_priv *p = netdev_priv(dev);
1016 struct dsa_switch *ds = p->parent;
1017
1018 if (ds->drv->fixed_link_update)
1019 ds->drv->fixed_link_update(ds, p->port, status);
1020
1021 return 0;
1022 }
1023
1024 /* slave device setup *******************************************************/
1025 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
1026 struct net_device *slave_dev,
1027 int addr)
1028 {
1029 struct dsa_switch *ds = p->parent;
1030
1031 p->phy = ds->slave_mii_bus->phy_map[addr];
1032 if (!p->phy) {
1033 netdev_err(slave_dev, "no phy at %d\n", addr);
1034 return -ENODEV;
1035 }
1036
1037 /* Use already configured phy mode */
1038 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1039 p->phy_interface = p->phy->interface;
1040 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
1041 p->phy_interface);
1042
1043 return 0;
1044 }
1045
1046 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
1047 struct net_device *slave_dev)
1048 {
1049 struct dsa_switch *ds = p->parent;
1050 struct dsa_chip_data *cd = ds->pd;
1051 struct device_node *phy_dn, *port_dn;
1052 bool phy_is_fixed = false;
1053 u32 phy_flags = 0;
1054 int mode, ret;
1055
1056 port_dn = cd->port_dn[p->port];
1057 mode = of_get_phy_mode(port_dn);
1058 if (mode < 0)
1059 mode = PHY_INTERFACE_MODE_NA;
1060 p->phy_interface = mode;
1061
1062 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1063 if (of_phy_is_fixed_link(port_dn)) {
1064 /* In the case of a fixed PHY, the DT node associated
1065 * to the fixed PHY is the Port DT node
1066 */
1067 ret = of_phy_register_fixed_link(port_dn);
1068 if (ret) {
1069 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
1070 return ret;
1071 }
1072 phy_is_fixed = true;
1073 phy_dn = port_dn;
1074 }
1075
1076 if (ds->drv->get_phy_flags)
1077 phy_flags = ds->drv->get_phy_flags(ds, p->port);
1078
1079 if (phy_dn) {
1080 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
1081
1082 /* If this PHY address is part of phys_mii_mask, which means
1083 * that we need to divert reads and writes to/from it, then we
1084 * want to bind this device using the slave MII bus created by
1085 * DSA to make that happen.
1086 */
1087 if (!phy_is_fixed && phy_id >= 0 &&
1088 (ds->phys_mii_mask & (1 << phy_id))) {
1089 ret = dsa_slave_phy_connect(p, slave_dev, phy_id);
1090 if (ret) {
1091 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret);
1092 return ret;
1093 }
1094 } else {
1095 p->phy = of_phy_connect(slave_dev, phy_dn,
1096 dsa_slave_adjust_link,
1097 phy_flags,
1098 p->phy_interface);
1099 }
1100 }
1101
1102 if (p->phy && phy_is_fixed)
1103 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
1104
1105 /* We could not connect to a designated PHY, so use the switch internal
1106 * MDIO bus instead
1107 */
1108 if (!p->phy) {
1109 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
1110 if (ret) {
1111 netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret);
1112 return ret;
1113 }
1114 } else {
1115 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
1116 p->phy->addr, p->phy->drv->name);
1117 }
1118
1119 return 0;
1120 }
1121
1122 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1123 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1124 struct netdev_queue *txq,
1125 void *_unused)
1126 {
1127 lockdep_set_class(&txq->_xmit_lock,
1128 &dsa_slave_netdev_xmit_lock_key);
1129 }
1130
1131 int dsa_slave_suspend(struct net_device *slave_dev)
1132 {
1133 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1134
1135 if (p->phy) {
1136 phy_stop(p->phy);
1137 p->old_pause = -1;
1138 p->old_link = -1;
1139 p->old_duplex = -1;
1140 phy_suspend(p->phy);
1141 }
1142
1143 return 0;
1144 }
1145
1146 int dsa_slave_resume(struct net_device *slave_dev)
1147 {
1148 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1149
1150 netif_device_attach(slave_dev);
1151
1152 if (p->phy) {
1153 phy_resume(p->phy);
1154 phy_start(p->phy);
1155 }
1156
1157 return 0;
1158 }
1159
1160 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1161 int port, char *name)
1162 {
1163 struct net_device *master = ds->dst->master_netdev;
1164 struct net_device *slave_dev;
1165 struct dsa_slave_priv *p;
1166 int ret;
1167
1168 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1169 NET_NAME_UNKNOWN, ether_setup);
1170 if (slave_dev == NULL)
1171 return -ENOMEM;
1172
1173 slave_dev->features = master->vlan_features;
1174 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1175 eth_hw_addr_inherit(slave_dev, master);
1176 slave_dev->priv_flags |= IFF_NO_QUEUE;
1177 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1178 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1179 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1180
1181 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1182 NULL);
1183
1184 SET_NETDEV_DEV(slave_dev, parent);
1185 slave_dev->dev.of_node = ds->pd->port_dn[port];
1186 slave_dev->vlan_features = master->vlan_features;
1187
1188 p = netdev_priv(slave_dev);
1189 p->dev = slave_dev;
1190 p->parent = ds;
1191 p->port = port;
1192
1193 switch (ds->dst->tag_protocol) {
1194 #ifdef CONFIG_NET_DSA_TAG_DSA
1195 case DSA_TAG_PROTO_DSA:
1196 p->xmit = dsa_netdev_ops.xmit;
1197 break;
1198 #endif
1199 #ifdef CONFIG_NET_DSA_TAG_EDSA
1200 case DSA_TAG_PROTO_EDSA:
1201 p->xmit = edsa_netdev_ops.xmit;
1202 break;
1203 #endif
1204 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1205 case DSA_TAG_PROTO_TRAILER:
1206 p->xmit = trailer_netdev_ops.xmit;
1207 break;
1208 #endif
1209 #ifdef CONFIG_NET_DSA_TAG_BRCM
1210 case DSA_TAG_PROTO_BRCM:
1211 p->xmit = brcm_netdev_ops.xmit;
1212 break;
1213 #endif
1214 default:
1215 p->xmit = dsa_slave_notag_xmit;
1216 break;
1217 }
1218
1219 p->old_pause = -1;
1220 p->old_link = -1;
1221 p->old_duplex = -1;
1222
1223 ret = dsa_slave_phy_setup(p, slave_dev);
1224 if (ret) {
1225 netdev_err(master, "error %d setting up slave phy\n", ret);
1226 free_netdev(slave_dev);
1227 return ret;
1228 }
1229
1230 ds->ports[port] = slave_dev;
1231 ret = register_netdev(slave_dev);
1232 if (ret) {
1233 netdev_err(master, "error %d registering interface %s\n",
1234 ret, slave_dev->name);
1235 phy_disconnect(p->phy);
1236 ds->ports[port] = NULL;
1237 free_netdev(slave_dev);
1238 return ret;
1239 }
1240
1241 netif_carrier_off(slave_dev);
1242
1243 return 0;
1244 }
1245
1246 static bool dsa_slave_dev_check(struct net_device *dev)
1247 {
1248 return dev->netdev_ops == &dsa_slave_netdev_ops;
1249 }
1250
1251 static int dsa_slave_master_changed(struct net_device *dev)
1252 {
1253 struct net_device *master = netdev_master_upper_dev_get(dev);
1254 struct dsa_slave_priv *p = netdev_priv(dev);
1255 int err = 0;
1256
1257 if (master && master->rtnl_link_ops &&
1258 !strcmp(master->rtnl_link_ops->kind, "bridge"))
1259 err = dsa_slave_bridge_port_join(dev, master);
1260 else if (dsa_port_is_bridged(p))
1261 err = dsa_slave_bridge_port_leave(dev);
1262
1263 return err;
1264 }
1265
1266 int dsa_slave_netdevice_event(struct notifier_block *unused,
1267 unsigned long event, void *ptr)
1268 {
1269 struct net_device *dev;
1270 int err = 0;
1271
1272 switch (event) {
1273 case NETDEV_CHANGEUPPER:
1274 dev = netdev_notifier_info_to_dev(ptr);
1275 if (!dsa_slave_dev_check(dev))
1276 goto out;
1277
1278 err = dsa_slave_master_changed(dev);
1279 if (err && err != -EOPNOTSUPP)
1280 netdev_warn(dev, "failed to reflect master change\n");
1281
1282 break;
1283 }
1284
1285 out:
1286 return NOTIFY_DONE;
1287 }
Linux kernel - Deliverables
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