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dsa: use prepare/commit switchdev transaction helpers
[linux-2.6/btrfs-unstable.git] / net / dsa / slave.c
blob71a11559b65f74a38432f8badd7930e5ee584d75
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 struct switchdev_obj *obj,
246 struct switchdev_trans *trans)
247 {
248 struct switchdev_obj_vlan *vlan = &obj->u.vlan;
249 struct dsa_slave_priv *p = netdev_priv(dev);
250 struct dsa_switch *ds = p->parent;
251 u16 vid;
252 int err;
253
254 if (switchdev_trans_ph_prepare(trans)) {
255 if (!ds->drv->port_vlan_add || !ds->drv->port_pvid_set)
256 return -EOPNOTSUPP;
257
258 /* If the requested port doesn't belong to the same bridge as
259 * the VLAN members, fallback to software VLAN (hopefully).
260 */
261 err = dsa_bridge_check_vlan_range(ds, p->bridge_dev,
262 vlan->vid_begin,
263 vlan->vid_end);
264 if (err)
265 return err;
266 } else {
267 for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
268 err = ds->drv->port_vlan_add(ds, p->port, vid,
269 vlan->flags &
270 BRIDGE_VLAN_INFO_UNTAGGED);
271 if (!err && vlan->flags & BRIDGE_VLAN_INFO_PVID)
272 err = ds->drv->port_pvid_set(ds, p->port, vid);
273 if (err)
274 return err;
275 }
276 }
277
278 return 0;
279 }
280
281 static int dsa_slave_port_vlan_del(struct net_device *dev,
282 struct switchdev_obj *obj)
283 {
284 struct switchdev_obj_vlan *vlan = &obj->u.vlan;
285 struct dsa_slave_priv *p = netdev_priv(dev);
286 struct dsa_switch *ds = p->parent;
287 u16 vid;
288 int err;
289
290 if (!ds->drv->port_vlan_del)
291 return -EOPNOTSUPP;
292
293 for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
294 err = ds->drv->port_vlan_del(ds, p->port, vid);
295 if (err)
296 return err;
297 }
298
299 return 0;
300 }
301
302 static int dsa_slave_port_vlan_dump(struct net_device *dev,
303 struct switchdev_obj *obj)
304 {
305 struct switchdev_obj_vlan *vlan = &obj->u.vlan;
306 struct dsa_slave_priv *p = netdev_priv(dev);
307 struct dsa_switch *ds = p->parent;
308 DECLARE_BITMAP(members, DSA_MAX_PORTS);
309 DECLARE_BITMAP(untagged, DSA_MAX_PORTS);
310 u16 pvid, vid = 0;
311 int err;
312
313 if (!ds->drv->vlan_getnext || !ds->drv->port_pvid_get)
314 return -EOPNOTSUPP;
315
316 err = ds->drv->port_pvid_get(ds, p->port, &pvid);
317 if (err)
318 return err;
319
320 for (;;) {
321 err = ds->drv->vlan_getnext(ds, &vid, members, untagged);
322 if (err)
323 break;
324
325 if (!test_bit(p->port, members))
326 continue;
327
328 memset(vlan, 0, sizeof(*vlan));
329 vlan->vid_begin = vlan->vid_end = vid;
330
331 if (vid == pvid)
332 vlan->flags |= BRIDGE_VLAN_INFO_PVID;
333
334 if (test_bit(p->port, untagged))
335 vlan->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
336
337 err = obj->cb(dev, obj);
338 if (err)
339 break;
340 }
341
342 return err == -ENOENT ? 0 : err;
343 }
344
345 static int dsa_slave_port_fdb_add(struct net_device *dev,
346 struct switchdev_obj *obj,
347 struct switchdev_trans *trans)
348 {
349 struct switchdev_obj_fdb *fdb = &obj->u.fdb;
350 struct dsa_slave_priv *p = netdev_priv(dev);
351 struct dsa_switch *ds = p->parent;
352 int ret = -EOPNOTSUPP;
353
354 if (switchdev_trans_ph_prepare(trans))
355 ret = ds->drv->port_fdb_add ? 0 : -EOPNOTSUPP;
356 else
357 ret = ds->drv->port_fdb_add(ds, p->port, fdb->addr, fdb->vid);
358
359 return ret;
360 }
361
362 static int dsa_slave_port_fdb_del(struct net_device *dev,
363 struct switchdev_obj *obj)
364 {
365 struct switchdev_obj_fdb *fdb = &obj->u.fdb;
366 struct dsa_slave_priv *p = netdev_priv(dev);
367 struct dsa_switch *ds = p->parent;
368 int ret = -EOPNOTSUPP;
369
370 if (ds->drv->port_fdb_del)
371 ret = ds->drv->port_fdb_del(ds, p->port, fdb->addr, fdb->vid);
372
373 return ret;
374 }
375
376 static int dsa_slave_port_fdb_dump(struct net_device *dev,
377 struct switchdev_obj *obj)
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 obj->u.fdb.addr = addr;
397 obj->u.fdb.vid = vid;
398 obj->u.fdb.ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
399
400 ret = obj->cb(dev, 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 struct switchdev_attr *attr,
457 struct switchdev_trans *trans)
458 {
459 int ret = 0;
460
461 switch (attr->id) {
462 case SWITCHDEV_ATTR_PORT_STP_STATE:
463 if (switchdev_trans_ph_commit(trans))
464 ret = dsa_slave_stp_update(dev, attr->u.stp_state);
465 break;
466 default:
467 ret = -EOPNOTSUPP;
468 break;
469 }
470
471 return ret;
472 }
473
474 static int dsa_slave_port_obj_add(struct net_device *dev,
475 struct switchdev_obj *obj,
476 struct switchdev_trans *trans)
477 {
478 int err;
479
480 /* For the prepare phase, ensure the full set of changes is feasable in
481 * one go in order to signal a failure properly. If an operation is not
482 * supported, return -EOPNOTSUPP.
483 */
484
485 switch (obj->id) {
486 case SWITCHDEV_OBJ_PORT_FDB:
487 err = dsa_slave_port_fdb_add(dev, obj, trans);
488 break;
489 case SWITCHDEV_OBJ_PORT_VLAN:
490 err = dsa_slave_port_vlan_add(dev, obj, trans);
491 break;
492 default:
493 err = -EOPNOTSUPP;
494 break;
495 }
496
497 return err;
498 }
499
500 static int dsa_slave_port_obj_del(struct net_device *dev,
501 struct switchdev_obj *obj)
502 {
503 int err;
504
505 switch (obj->id) {
506 case SWITCHDEV_OBJ_PORT_FDB:
507 err = dsa_slave_port_fdb_del(dev, obj);
508 break;
509 case SWITCHDEV_OBJ_PORT_VLAN:
510 err = dsa_slave_port_vlan_del(dev, obj);
511 break;
512 default:
513 err = -EOPNOTSUPP;
514 break;
515 }
516
517 return err;
518 }
519
520 static int dsa_slave_port_obj_dump(struct net_device *dev,
521 struct switchdev_obj *obj)
522 {
523 int err;
524
525 switch (obj->id) {
526 case SWITCHDEV_OBJ_PORT_FDB:
527 err = dsa_slave_port_fdb_dump(dev, obj);
528 break;
529 case SWITCHDEV_OBJ_PORT_VLAN:
530 err = dsa_slave_port_vlan_dump(dev, obj);
531 break;
532 default:
533 err = -EOPNOTSUPP;
534 break;
535 }
536
537 return err;
538 }
539
540 static int dsa_slave_bridge_port_join(struct net_device *dev,
541 struct net_device *br)
542 {
543 struct dsa_slave_priv *p = netdev_priv(dev);
544 struct dsa_switch *ds = p->parent;
545 int ret = -EOPNOTSUPP;
546
547 p->bridge_dev = br;
548
549 if (ds->drv->port_join_bridge)
550 ret = ds->drv->port_join_bridge(ds, p->port,
551 dsa_slave_br_port_mask(ds, br));
552
553 return ret;
554 }
555
556 static int dsa_slave_bridge_port_leave(struct net_device *dev)
557 {
558 struct dsa_slave_priv *p = netdev_priv(dev);
559 struct dsa_switch *ds = p->parent;
560 int ret = -EOPNOTSUPP;
561
562
563 if (ds->drv->port_leave_bridge)
564 ret = ds->drv->port_leave_bridge(ds, p->port,
565 dsa_slave_br_port_mask(ds, p->bridge_dev));
566
567 p->bridge_dev = NULL;
568
569 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
570 * so allow it to be in BR_STATE_FORWARDING to be kept functional
571 */
572 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
573
574 return ret;
575 }
576
577 static int dsa_slave_port_attr_get(struct net_device *dev,
578 struct switchdev_attr *attr)
579 {
580 struct dsa_slave_priv *p = netdev_priv(dev);
581 struct dsa_switch *ds = p->parent;
582
583 switch (attr->id) {
584 case SWITCHDEV_ATTR_PORT_PARENT_ID:
585 attr->u.ppid.id_len = sizeof(ds->index);
586 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
587 break;
588 default:
589 return -EOPNOTSUPP;
590 }
591
592 return 0;
593 }
594
595 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
596 struct sk_buff *skb)
597 {
598 #ifdef CONFIG_NET_POLL_CONTROLLER
599 if (p->netpoll)
600 netpoll_send_skb(p->netpoll, skb);
601 #else
602 BUG();
603 #endif
604 return NETDEV_TX_OK;
605 }
606
607 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
608 {
609 struct dsa_slave_priv *p = netdev_priv(dev);
610 struct sk_buff *nskb;
611
612 dev->stats.tx_packets++;
613 dev->stats.tx_bytes += skb->len;
614
615 /* Transmit function may have to reallocate the original SKB */
616 nskb = p->xmit(skb, dev);
617 if (!nskb)
618 return NETDEV_TX_OK;
619
620 /* SKB for netpoll still need to be mangled with the protocol-specific
621 * tag to be successfully transmitted
622 */
623 if (unlikely(netpoll_tx_running(dev)))
624 return dsa_netpoll_send_skb(p, nskb);
625
626 /* Queue the SKB for transmission on the parent interface, but
627 * do not modify its EtherType
628 */
629 nskb->dev = p->parent->dst->master_netdev;
630 dev_queue_xmit(nskb);
631
632 return NETDEV_TX_OK;
633 }
634
635 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
636 struct net_device *dev)
637 {
638 /* Just return the original SKB */
639 return skb;
640 }
641
642
643 /* ethtool operations *******************************************************/
644 static int
645 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
646 {
647 struct dsa_slave_priv *p = netdev_priv(dev);
648 int err;
649
650 err = -EOPNOTSUPP;
651 if (p->phy != NULL) {
652 err = phy_read_status(p->phy);
653 if (err == 0)
654 err = phy_ethtool_gset(p->phy, cmd);
655 }
656
657 return err;
658 }
659
660 static int
661 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
662 {
663 struct dsa_slave_priv *p = netdev_priv(dev);
664
665 if (p->phy != NULL)
666 return phy_ethtool_sset(p->phy, cmd);
667
668 return -EOPNOTSUPP;
669 }
670
671 static void dsa_slave_get_drvinfo(struct net_device *dev,
672 struct ethtool_drvinfo *drvinfo)
673 {
674 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
675 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
676 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
677 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
678 }
679
680 static int dsa_slave_get_regs_len(struct net_device *dev)
681 {
682 struct dsa_slave_priv *p = netdev_priv(dev);
683 struct dsa_switch *ds = p->parent;
684
685 if (ds->drv->get_regs_len)
686 return ds->drv->get_regs_len(ds, p->port);
687
688 return -EOPNOTSUPP;
689 }
690
691 static void
692 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
693 {
694 struct dsa_slave_priv *p = netdev_priv(dev);
695 struct dsa_switch *ds = p->parent;
696
697 if (ds->drv->get_regs)
698 ds->drv->get_regs(ds, p->port, regs, _p);
699 }
700
701 static int dsa_slave_nway_reset(struct net_device *dev)
702 {
703 struct dsa_slave_priv *p = netdev_priv(dev);
704
705 if (p->phy != NULL)
706 return genphy_restart_aneg(p->phy);
707
708 return -EOPNOTSUPP;
709 }
710
711 static u32 dsa_slave_get_link(struct net_device *dev)
712 {
713 struct dsa_slave_priv *p = netdev_priv(dev);
714
715 if (p->phy != NULL) {
716 genphy_update_link(p->phy);
717 return p->phy->link;
718 }
719
720 return -EOPNOTSUPP;
721 }
722
723 static int dsa_slave_get_eeprom_len(struct net_device *dev)
724 {
725 struct dsa_slave_priv *p = netdev_priv(dev);
726 struct dsa_switch *ds = p->parent;
727
728 if (ds->pd->eeprom_len)
729 return ds->pd->eeprom_len;
730
731 if (ds->drv->get_eeprom_len)
732 return ds->drv->get_eeprom_len(ds);
733
734 return 0;
735 }
736
737 static int dsa_slave_get_eeprom(struct net_device *dev,
738 struct ethtool_eeprom *eeprom, u8 *data)
739 {
740 struct dsa_slave_priv *p = netdev_priv(dev);
741 struct dsa_switch *ds = p->parent;
742
743 if (ds->drv->get_eeprom)
744 return ds->drv->get_eeprom(ds, eeprom, data);
745
746 return -EOPNOTSUPP;
747 }
748
749 static int dsa_slave_set_eeprom(struct net_device *dev,
750 struct ethtool_eeprom *eeprom, u8 *data)
751 {
752 struct dsa_slave_priv *p = netdev_priv(dev);
753 struct dsa_switch *ds = p->parent;
754
755 if (ds->drv->set_eeprom)
756 return ds->drv->set_eeprom(ds, eeprom, data);
757
758 return -EOPNOTSUPP;
759 }
760
761 static void dsa_slave_get_strings(struct net_device *dev,
762 uint32_t stringset, uint8_t *data)
763 {
764 struct dsa_slave_priv *p = netdev_priv(dev);
765 struct dsa_switch *ds = p->parent;
766
767 if (stringset == ETH_SS_STATS) {
768 int len = ETH_GSTRING_LEN;
769
770 strncpy(data, "tx_packets", len);
771 strncpy(data + len, "tx_bytes", len);
772 strncpy(data + 2 * len, "rx_packets", len);
773 strncpy(data + 3 * len, "rx_bytes", len);
774 if (ds->drv->get_strings != NULL)
775 ds->drv->get_strings(ds, p->port, data + 4 * len);
776 }
777 }
778
779 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
780 struct ethtool_stats *stats,
781 uint64_t *data)
782 {
783 struct dsa_slave_priv *p = netdev_priv(dev);
784 struct dsa_switch *ds = p->parent;
785
786 data[0] = p->dev->stats.tx_packets;
787 data[1] = p->dev->stats.tx_bytes;
788 data[2] = p->dev->stats.rx_packets;
789 data[3] = p->dev->stats.rx_bytes;
790 if (ds->drv->get_ethtool_stats != NULL)
791 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
792 }
793
794 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
795 {
796 struct dsa_slave_priv *p = netdev_priv(dev);
797 struct dsa_switch *ds = p->parent;
798
799 if (sset == ETH_SS_STATS) {
800 int count;
801
802 count = 4;
803 if (ds->drv->get_sset_count != NULL)
804 count += ds->drv->get_sset_count(ds);
805
806 return count;
807 }
808
809 return -EOPNOTSUPP;
810 }
811
812 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
813 {
814 struct dsa_slave_priv *p = netdev_priv(dev);
815 struct dsa_switch *ds = p->parent;
816
817 if (ds->drv->get_wol)
818 ds->drv->get_wol(ds, p->port, w);
819 }
820
821 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
822 {
823 struct dsa_slave_priv *p = netdev_priv(dev);
824 struct dsa_switch *ds = p->parent;
825 int ret = -EOPNOTSUPP;
826
827 if (ds->drv->set_wol)
828 ret = ds->drv->set_wol(ds, p->port, w);
829
830 return ret;
831 }
832
833 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
834 {
835 struct dsa_slave_priv *p = netdev_priv(dev);
836 struct dsa_switch *ds = p->parent;
837 int ret;
838
839 if (!ds->drv->set_eee)
840 return -EOPNOTSUPP;
841
842 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
843 if (ret)
844 return ret;
845
846 if (p->phy)
847 ret = phy_ethtool_set_eee(p->phy, e);
848
849 return ret;
850 }
851
852 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
853 {
854 struct dsa_slave_priv *p = netdev_priv(dev);
855 struct dsa_switch *ds = p->parent;
856 int ret;
857
858 if (!ds->drv->get_eee)
859 return -EOPNOTSUPP;
860
861 ret = ds->drv->get_eee(ds, p->port, e);
862 if (ret)
863 return ret;
864
865 if (p->phy)
866 ret = phy_ethtool_get_eee(p->phy, e);
867
868 return ret;
869 }
870
871 #ifdef CONFIG_NET_POLL_CONTROLLER
872 static int dsa_slave_netpoll_setup(struct net_device *dev,
873 struct netpoll_info *ni)
874 {
875 struct dsa_slave_priv *p = netdev_priv(dev);
876 struct dsa_switch *ds = p->parent;
877 struct net_device *master = ds->dst->master_netdev;
878 struct netpoll *netpoll;
879 int err = 0;
880
881 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
882 if (!netpoll)
883 return -ENOMEM;
884
885 err = __netpoll_setup(netpoll, master);
886 if (err) {
887 kfree(netpoll);
888 goto out;
889 }
890
891 p->netpoll = netpoll;
892 out:
893 return err;
894 }
895
896 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
897 {
898 struct dsa_slave_priv *p = netdev_priv(dev);
899 struct netpoll *netpoll = p->netpoll;
900
901 if (!netpoll)
902 return;
903
904 p->netpoll = NULL;
905
906 __netpoll_free_async(netpoll);
907 }
908
909 static void dsa_slave_poll_controller(struct net_device *dev)
910 {
911 }
912 #endif
913
914 static const struct ethtool_ops dsa_slave_ethtool_ops = {
915 .get_settings = dsa_slave_get_settings,
916 .set_settings = dsa_slave_set_settings,
917 .get_drvinfo = dsa_slave_get_drvinfo,
918 .get_regs_len = dsa_slave_get_regs_len,
919 .get_regs = dsa_slave_get_regs,
920 .nway_reset = dsa_slave_nway_reset,
921 .get_link = dsa_slave_get_link,
922 .get_eeprom_len = dsa_slave_get_eeprom_len,
923 .get_eeprom = dsa_slave_get_eeprom,
924 .set_eeprom = dsa_slave_set_eeprom,
925 .get_strings = dsa_slave_get_strings,
926 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
927 .get_sset_count = dsa_slave_get_sset_count,
928 .set_wol = dsa_slave_set_wol,
929 .get_wol = dsa_slave_get_wol,
930 .set_eee = dsa_slave_set_eee,
931 .get_eee = dsa_slave_get_eee,
932 };
933
934 static const struct net_device_ops dsa_slave_netdev_ops = {
935 .ndo_open = dsa_slave_open,
936 .ndo_stop = dsa_slave_close,
937 .ndo_start_xmit = dsa_slave_xmit,
938 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
939 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
940 .ndo_set_mac_address = dsa_slave_set_mac_address,
941 .ndo_fdb_add = switchdev_port_fdb_add,
942 .ndo_fdb_del = switchdev_port_fdb_del,
943 .ndo_fdb_dump = switchdev_port_fdb_dump,
944 .ndo_do_ioctl = dsa_slave_ioctl,
945 .ndo_get_iflink = dsa_slave_get_iflink,
946 #ifdef CONFIG_NET_POLL_CONTROLLER
947 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
948 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
949 .ndo_poll_controller = dsa_slave_poll_controller,
950 #endif
951 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
952 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
953 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
954 };
955
956 static const struct switchdev_ops dsa_slave_switchdev_ops = {
957 .switchdev_port_attr_get = dsa_slave_port_attr_get,
958 .switchdev_port_attr_set = dsa_slave_port_attr_set,
959 .switchdev_port_obj_add = dsa_slave_port_obj_add,
960 .switchdev_port_obj_del = dsa_slave_port_obj_del,
961 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
962 };
963
964 static void dsa_slave_adjust_link(struct net_device *dev)
965 {
966 struct dsa_slave_priv *p = netdev_priv(dev);
967 struct dsa_switch *ds = p->parent;
968 unsigned int status_changed = 0;
969
970 if (p->old_link != p->phy->link) {
971 status_changed = 1;
972 p->old_link = p->phy->link;
973 }
974
975 if (p->old_duplex != p->phy->duplex) {
976 status_changed = 1;
977 p->old_duplex = p->phy->duplex;
978 }
979
980 if (p->old_pause != p->phy->pause) {
981 status_changed = 1;
982 p->old_pause = p->phy->pause;
983 }
984
985 if (ds->drv->adjust_link && status_changed)
986 ds->drv->adjust_link(ds, p->port, p->phy);
987
988 if (status_changed)
989 phy_print_status(p->phy);
990 }
991
992 static int dsa_slave_fixed_link_update(struct net_device *dev,
993 struct fixed_phy_status *status)
994 {
995 struct dsa_slave_priv *p = netdev_priv(dev);
996 struct dsa_switch *ds = p->parent;
997
998 if (ds->drv->fixed_link_update)
999 ds->drv->fixed_link_update(ds, p->port, status);
1000
1001 return 0;
1002 }
1003
1004 /* slave device setup *******************************************************/
1005 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
1006 struct net_device *slave_dev,
1007 int addr)
1008 {
1009 struct dsa_switch *ds = p->parent;
1010
1011 p->phy = ds->slave_mii_bus->phy_map[addr];
1012 if (!p->phy)
1013 return -ENODEV;
1014
1015 /* Use already configured phy mode */
1016 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1017 p->phy_interface = p->phy->interface;
1018 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
1019 p->phy_interface);
1020
1021 return 0;
1022 }
1023
1024 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
1025 struct net_device *slave_dev)
1026 {
1027 struct dsa_switch *ds = p->parent;
1028 struct dsa_chip_data *cd = ds->pd;
1029 struct device_node *phy_dn, *port_dn;
1030 bool phy_is_fixed = false;
1031 u32 phy_flags = 0;
1032 int mode, ret;
1033
1034 port_dn = cd->port_dn[p->port];
1035 mode = of_get_phy_mode(port_dn);
1036 if (mode < 0)
1037 mode = PHY_INTERFACE_MODE_NA;
1038 p->phy_interface = mode;
1039
1040 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1041 if (of_phy_is_fixed_link(port_dn)) {
1042 /* In the case of a fixed PHY, the DT node associated
1043 * to the fixed PHY is the Port DT node
1044 */
1045 ret = of_phy_register_fixed_link(port_dn);
1046 if (ret) {
1047 netdev_err(slave_dev, "failed to register fixed PHY\n");
1048 return ret;
1049 }
1050 phy_is_fixed = true;
1051 phy_dn = port_dn;
1052 }
1053
1054 if (ds->drv->get_phy_flags)
1055 phy_flags = ds->drv->get_phy_flags(ds, p->port);
1056
1057 if (phy_dn) {
1058 ret = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
1059 /* If this PHY address is part of phys_mii_mask, which means
1060 * that we need to divert reads and writes to/from it, then we
1061 * want to bind this device using the slave MII bus created by
1062 * DSA to make that happen.
1063 */
1064 if (!phy_is_fixed && ret >= 0 &&
1065 (ds->phys_mii_mask & (1 << ret))) {
1066 ret = dsa_slave_phy_connect(p, slave_dev, ret);
1067 if (ret)
1068 return ret;
1069 } else {
1070 p->phy = of_phy_connect(slave_dev, phy_dn,
1071 dsa_slave_adjust_link,
1072 phy_flags,
1073 p->phy_interface);
1074 }
1075 }
1076
1077 if (p->phy && phy_is_fixed)
1078 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
1079
1080 /* We could not connect to a designated PHY, so use the switch internal
1081 * MDIO bus instead
1082 */
1083 if (!p->phy) {
1084 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
1085 if (ret)
1086 return ret;
1087 } else {
1088 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
1089 p->phy->addr, p->phy->drv->name);
1090 }
1091
1092 return 0;
1093 }
1094
1095 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1096 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1097 struct netdev_queue *txq,
1098 void *_unused)
1099 {
1100 lockdep_set_class(&txq->_xmit_lock,
1101 &dsa_slave_netdev_xmit_lock_key);
1102 }
1103
1104 int dsa_slave_suspend(struct net_device *slave_dev)
1105 {
1106 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1107
1108 if (p->phy) {
1109 phy_stop(p->phy);
1110 p->old_pause = -1;
1111 p->old_link = -1;
1112 p->old_duplex = -1;
1113 phy_suspend(p->phy);
1114 }
1115
1116 return 0;
1117 }
1118
1119 int dsa_slave_resume(struct net_device *slave_dev)
1120 {
1121 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1122
1123 netif_device_attach(slave_dev);
1124
1125 if (p->phy) {
1126 phy_resume(p->phy);
1127 phy_start(p->phy);
1128 }
1129
1130 return 0;
1131 }
1132
1133 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1134 int port, char *name)
1135 {
1136 struct net_device *master = ds->dst->master_netdev;
1137 struct net_device *slave_dev;
1138 struct dsa_slave_priv *p;
1139 int ret;
1140
1141 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1142 NET_NAME_UNKNOWN, ether_setup);
1143 if (slave_dev == NULL)
1144 return -ENOMEM;
1145
1146 slave_dev->features = master->vlan_features;
1147 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1148 eth_hw_addr_inherit(slave_dev, master);
1149 slave_dev->priv_flags |= IFF_NO_QUEUE;
1150 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1151 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1152
1153 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1154 NULL);
1155
1156 SET_NETDEV_DEV(slave_dev, parent);
1157 slave_dev->dev.of_node = ds->pd->port_dn[port];
1158 slave_dev->vlan_features = master->vlan_features;
1159
1160 p = netdev_priv(slave_dev);
1161 p->dev = slave_dev;
1162 p->parent = ds;
1163 p->port = port;
1164
1165 switch (ds->dst->tag_protocol) {
1166 #ifdef CONFIG_NET_DSA_TAG_DSA
1167 case DSA_TAG_PROTO_DSA:
1168 p->xmit = dsa_netdev_ops.xmit;
1169 break;
1170 #endif
1171 #ifdef CONFIG_NET_DSA_TAG_EDSA
1172 case DSA_TAG_PROTO_EDSA:
1173 p->xmit = edsa_netdev_ops.xmit;
1174 break;
1175 #endif
1176 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1177 case DSA_TAG_PROTO_TRAILER:
1178 p->xmit = trailer_netdev_ops.xmit;
1179 break;
1180 #endif
1181 #ifdef CONFIG_NET_DSA_TAG_BRCM
1182 case DSA_TAG_PROTO_BRCM:
1183 p->xmit = brcm_netdev_ops.xmit;
1184 break;
1185 #endif
1186 default:
1187 p->xmit = dsa_slave_notag_xmit;
1188 break;
1189 }
1190
1191 p->old_pause = -1;
1192 p->old_link = -1;
1193 p->old_duplex = -1;
1194
1195 ret = dsa_slave_phy_setup(p, slave_dev);
1196 if (ret) {
1197 free_netdev(slave_dev);
1198 return ret;
1199 }
1200
1201 ds->ports[port] = slave_dev;
1202 ret = register_netdev(slave_dev);
1203 if (ret) {
1204 netdev_err(master, "error %d registering interface %s\n",
1205 ret, slave_dev->name);
1206 phy_disconnect(p->phy);
1207 ds->ports[port] = NULL;
1208 free_netdev(slave_dev);
1209 return ret;
1210 }
1211
1212 netif_carrier_off(slave_dev);
1213
1214 return 0;
1215 }
1216
1217 static bool dsa_slave_dev_check(struct net_device *dev)
1218 {
1219 return dev->netdev_ops == &dsa_slave_netdev_ops;
1220 }
1221
1222 static int dsa_slave_master_changed(struct net_device *dev)
1223 {
1224 struct net_device *master = netdev_master_upper_dev_get(dev);
1225 struct dsa_slave_priv *p = netdev_priv(dev);
1226 int err = 0;
1227
1228 if (master && master->rtnl_link_ops &&
1229 !strcmp(master->rtnl_link_ops->kind, "bridge"))
1230 err = dsa_slave_bridge_port_join(dev, master);
1231 else if (dsa_port_is_bridged(p))
1232 err = dsa_slave_bridge_port_leave(dev);
1233
1234 return err;
1235 }
1236
1237 int dsa_slave_netdevice_event(struct notifier_block *unused,
1238 unsigned long event, void *ptr)
1239 {
1240 struct net_device *dev;
1241 int err = 0;
1242
1243 switch (event) {
1244 case NETDEV_CHANGEUPPER:
1245 dev = netdev_notifier_info_to_dev(ptr);
1246 if (!dsa_slave_dev_check(dev))
1247 goto out;
1248
1249 err = dsa_slave_master_changed(dev);
1250 if (err)
1251 netdev_warn(dev, "failed to reflect master change\n");
1252
1253 break;
1254 }
1255
1256 out:
1257 return NOTIFY_DONE;
1258 }
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