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Merge remote-tracking branches 'spi/fix/atmel', 'spi/fix/bcm2835', 'spi/fix/doc'...
[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 struct switchdev_obj *obj)
246 {
247 struct switchdev_obj_vlan *vlan = &obj->u.vlan;
248 struct dsa_slave_priv *p = netdev_priv(dev);
249 struct dsa_switch *ds = p->parent;
250 u16 vid;
251 int err;
252
253 switch (obj->trans) {
254 case SWITCHDEV_TRANS_PREPARE:
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 break;
267 case SWITCHDEV_TRANS_COMMIT:
268 for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
269 err = ds->drv->port_vlan_add(ds, p->port, vid,
270 vlan->flags &
271 BRIDGE_VLAN_INFO_UNTAGGED);
272 if (!err && vlan->flags & BRIDGE_VLAN_INFO_PVID)
273 err = ds->drv->port_pvid_set(ds, p->port, vid);
274 if (err)
275 return err;
276 }
277 break;
278 default:
279 return -EOPNOTSUPP;
280 }
281
282 return 0;
283 }
284
285 static int dsa_slave_port_vlan_del(struct net_device *dev,
286 struct switchdev_obj *obj)
287 {
288 struct switchdev_obj_vlan *vlan = &obj->u.vlan;
289 struct dsa_slave_priv *p = netdev_priv(dev);
290 struct dsa_switch *ds = p->parent;
291 u16 vid;
292 int err;
293
294 if (!ds->drv->port_vlan_del)
295 return -EOPNOTSUPP;
296
297 for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
298 err = ds->drv->port_vlan_del(ds, p->port, vid);
299 if (err)
300 return err;
301 }
302
303 return 0;
304 }
305
306 static int dsa_slave_port_vlan_dump(struct net_device *dev,
307 struct switchdev_obj *obj)
308 {
309 struct switchdev_obj_vlan *vlan = &obj->u.vlan;
310 struct dsa_slave_priv *p = netdev_priv(dev);
311 struct dsa_switch *ds = p->parent;
312 DECLARE_BITMAP(members, DSA_MAX_PORTS);
313 DECLARE_BITMAP(untagged, DSA_MAX_PORTS);
314 u16 pvid, vid = 0;
315 int err;
316
317 if (!ds->drv->vlan_getnext || !ds->drv->port_pvid_get)
318 return -EOPNOTSUPP;
319
320 err = ds->drv->port_pvid_get(ds, p->port, &pvid);
321 if (err)
322 return err;
323
324 for (;;) {
325 err = ds->drv->vlan_getnext(ds, &vid, members, untagged);
326 if (err)
327 break;
328
329 if (!test_bit(p->port, members))
330 continue;
331
332 memset(vlan, 0, sizeof(*vlan));
333 vlan->vid_begin = vlan->vid_end = vid;
334
335 if (vid == pvid)
336 vlan->flags |= BRIDGE_VLAN_INFO_PVID;
337
338 if (test_bit(p->port, untagged))
339 vlan->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
340
341 err = obj->cb(dev, obj);
342 if (err)
343 break;
344 }
345
346 return err == -ENOENT ? 0 : err;
347 }
348
349 static int dsa_slave_port_fdb_add(struct net_device *dev,
350 struct switchdev_obj *obj)
351 {
352 struct switchdev_obj_fdb *fdb = &obj->u.fdb;
353 struct dsa_slave_priv *p = netdev_priv(dev);
354 struct dsa_switch *ds = p->parent;
355 int ret = -EOPNOTSUPP;
356
357 if (obj->trans == SWITCHDEV_TRANS_PREPARE)
358 ret = ds->drv->port_fdb_add ? 0 : -EOPNOTSUPP;
359 else if (obj->trans == SWITCHDEV_TRANS_COMMIT)
360 ret = ds->drv->port_fdb_add(ds, p->port, fdb->addr, fdb->vid);
361
362 return ret;
363 }
364
365 static int dsa_slave_port_fdb_del(struct net_device *dev,
366 struct switchdev_obj *obj)
367 {
368 struct switchdev_obj_fdb *fdb = &obj->u.fdb;
369 struct dsa_slave_priv *p = netdev_priv(dev);
370 struct dsa_switch *ds = p->parent;
371 int ret = -EOPNOTSUPP;
372
373 if (ds->drv->port_fdb_del)
374 ret = ds->drv->port_fdb_del(ds, p->port, fdb->addr, fdb->vid);
375
376 return ret;
377 }
378
379 static int dsa_slave_port_fdb_dump(struct net_device *dev,
380 struct switchdev_obj *obj)
381 {
382 struct dsa_slave_priv *p = netdev_priv(dev);
383 struct dsa_switch *ds = p->parent;
384 unsigned char addr[ETH_ALEN] = { 0 };
385 u16 vid = 0;
386 int ret;
387
388 if (!ds->drv->port_fdb_getnext)
389 return -EOPNOTSUPP;
390
391 for (;;) {
392 bool is_static;
393
394 ret = ds->drv->port_fdb_getnext(ds, p->port, addr, &vid,
395 &is_static);
396 if (ret < 0)
397 break;
398
399 obj->u.fdb.addr = addr;
400 obj->u.fdb.vid = vid;
401 obj->u.fdb.ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
402
403 ret = obj->cb(dev, obj);
404 if (ret < 0)
405 break;
406 }
407
408 return ret == -ENOENT ? 0 : ret;
409 }
410
411 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
412 {
413 struct dsa_slave_priv *p = netdev_priv(dev);
414
415 if (p->phy != NULL)
416 return phy_mii_ioctl(p->phy, ifr, cmd);
417
418 return -EOPNOTSUPP;
419 }
420
421 /* Return a bitmask of all ports being currently bridged within a given bridge
422 * device. Note that on leave, the mask will still return the bitmask of ports
423 * currently bridged, prior to port removal, and this is exactly what we want.
424 */
425 static u32 dsa_slave_br_port_mask(struct dsa_switch *ds,
426 struct net_device *bridge)
427 {
428 struct dsa_slave_priv *p;
429 unsigned int port;
430 u32 mask = 0;
431
432 for (port = 0; port < DSA_MAX_PORTS; port++) {
433 if (!dsa_is_port_initialized(ds, port))
434 continue;
435
436 p = netdev_priv(ds->ports[port]);
437
438 if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT &&
439 p->bridge_dev == bridge)
440 mask |= 1 << port;
441 }
442
443 return mask;
444 }
445
446 static int dsa_slave_stp_update(struct net_device *dev, u8 state)
447 {
448 struct dsa_slave_priv *p = netdev_priv(dev);
449 struct dsa_switch *ds = p->parent;
450 int ret = -EOPNOTSUPP;
451
452 if (ds->drv->port_stp_update)
453 ret = ds->drv->port_stp_update(ds, p->port, state);
454
455 return ret;
456 }
457
458 static int dsa_slave_port_attr_set(struct net_device *dev,
459 struct switchdev_attr *attr)
460 {
461 int ret = 0;
462
463 switch (attr->id) {
464 case SWITCHDEV_ATTR_PORT_STP_STATE:
465 if (attr->trans == SWITCHDEV_TRANS_COMMIT)
466 ret = dsa_slave_stp_update(dev, attr->u.stp_state);
467 break;
468 default:
469 ret = -EOPNOTSUPP;
470 break;
471 }
472
473 return ret;
474 }
475
476 static int dsa_slave_port_obj_add(struct net_device *dev,
477 struct switchdev_obj *obj)
478 {
479 int err;
480
481 /* For the prepare phase, ensure the full set of changes is feasable in
482 * one go in order to signal a failure properly. If an operation is not
483 * supported, return -EOPNOTSUPP.
484 */
485
486 switch (obj->id) {
487 case SWITCHDEV_OBJ_PORT_FDB:
488 err = dsa_slave_port_fdb_add(dev, obj);
489 break;
490 case SWITCHDEV_OBJ_PORT_VLAN:
491 err = dsa_slave_port_vlan_add(dev, obj);
492 break;
493 default:
494 err = -EOPNOTSUPP;
495 break;
496 }
497
498 return err;
499 }
500
501 static int dsa_slave_port_obj_del(struct net_device *dev,
502 struct switchdev_obj *obj)
503 {
504 int err;
505
506 switch (obj->id) {
507 case SWITCHDEV_OBJ_PORT_FDB:
508 err = dsa_slave_port_fdb_del(dev, obj);
509 break;
510 case SWITCHDEV_OBJ_PORT_VLAN:
511 err = dsa_slave_port_vlan_del(dev, obj);
512 break;
513 default:
514 err = -EOPNOTSUPP;
515 break;
516 }
517
518 return err;
519 }
520
521 static int dsa_slave_port_obj_dump(struct net_device *dev,
522 struct switchdev_obj *obj)
523 {
524 int err;
525
526 switch (obj->id) {
527 case SWITCHDEV_OBJ_PORT_FDB:
528 err = dsa_slave_port_fdb_dump(dev, obj);
529 break;
530 case SWITCHDEV_OBJ_PORT_VLAN:
531 err = dsa_slave_port_vlan_dump(dev, obj);
532 break;
533 default:
534 err = -EOPNOTSUPP;
535 break;
536 }
537
538 return err;
539 }
540
541 static int dsa_slave_bridge_port_join(struct net_device *dev,
542 struct net_device *br)
543 {
544 struct dsa_slave_priv *p = netdev_priv(dev);
545 struct dsa_switch *ds = p->parent;
546 int ret = -EOPNOTSUPP;
547
548 p->bridge_dev = br;
549
550 if (ds->drv->port_join_bridge)
551 ret = ds->drv->port_join_bridge(ds, p->port,
552 dsa_slave_br_port_mask(ds, br));
553
554 return ret;
555 }
556
557 static int dsa_slave_bridge_port_leave(struct net_device *dev)
558 {
559 struct dsa_slave_priv *p = netdev_priv(dev);
560 struct dsa_switch *ds = p->parent;
561 int ret = -EOPNOTSUPP;
562
563
564 if (ds->drv->port_leave_bridge)
565 ret = ds->drv->port_leave_bridge(ds, p->port,
566 dsa_slave_br_port_mask(ds, p->bridge_dev));
567
568 p->bridge_dev = NULL;
569
570 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
571 * so allow it to be in BR_STATE_FORWARDING to be kept functional
572 */
573 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
574
575 return ret;
576 }
577
578 static int dsa_slave_port_attr_get(struct net_device *dev,
579 struct switchdev_attr *attr)
580 {
581 struct dsa_slave_priv *p = netdev_priv(dev);
582 struct dsa_switch *ds = p->parent;
583
584 switch (attr->id) {
585 case SWITCHDEV_ATTR_PORT_PARENT_ID:
586 attr->u.ppid.id_len = sizeof(ds->index);
587 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
588 break;
589 default:
590 return -EOPNOTSUPP;
591 }
592
593 return 0;
594 }
595
596 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
597 struct sk_buff *skb)
598 {
599 #ifdef CONFIG_NET_POLL_CONTROLLER
600 if (p->netpoll)
601 netpoll_send_skb(p->netpoll, skb);
602 #else
603 BUG();
604 #endif
605 return NETDEV_TX_OK;
606 }
607
608 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
609 {
610 struct dsa_slave_priv *p = netdev_priv(dev);
611 struct sk_buff *nskb;
612
613 dev->stats.tx_packets++;
614 dev->stats.tx_bytes += skb->len;
615
616 /* Transmit function may have to reallocate the original SKB */
617 nskb = p->xmit(skb, dev);
618 if (!nskb)
619 return NETDEV_TX_OK;
620
621 /* SKB for netpoll still need to be mangled with the protocol-specific
622 * tag to be successfully transmitted
623 */
624 if (unlikely(netpoll_tx_running(dev)))
625 return dsa_netpoll_send_skb(p, nskb);
626
627 /* Queue the SKB for transmission on the parent interface, but
628 * do not modify its EtherType
629 */
630 nskb->dev = p->parent->dst->master_netdev;
631 dev_queue_xmit(nskb);
632
633 return NETDEV_TX_OK;
634 }
635
636 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
637 struct net_device *dev)
638 {
639 /* Just return the original SKB */
640 return skb;
641 }
642
643
644 /* ethtool operations *******************************************************/
645 static int
646 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
647 {
648 struct dsa_slave_priv *p = netdev_priv(dev);
649 int err;
650
651 err = -EOPNOTSUPP;
652 if (p->phy != NULL) {
653 err = phy_read_status(p->phy);
654 if (err == 0)
655 err = phy_ethtool_gset(p->phy, cmd);
656 }
657
658 return err;
659 }
660
661 static int
662 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
663 {
664 struct dsa_slave_priv *p = netdev_priv(dev);
665
666 if (p->phy != NULL)
667 return phy_ethtool_sset(p->phy, cmd);
668
669 return -EOPNOTSUPP;
670 }
671
672 static void dsa_slave_get_drvinfo(struct net_device *dev,
673 struct ethtool_drvinfo *drvinfo)
674 {
675 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
676 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
677 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
678 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
679 }
680
681 static int dsa_slave_get_regs_len(struct net_device *dev)
682 {
683 struct dsa_slave_priv *p = netdev_priv(dev);
684 struct dsa_switch *ds = p->parent;
685
686 if (ds->drv->get_regs_len)
687 return ds->drv->get_regs_len(ds, p->port);
688
689 return -EOPNOTSUPP;
690 }
691
692 static void
693 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
694 {
695 struct dsa_slave_priv *p = netdev_priv(dev);
696 struct dsa_switch *ds = p->parent;
697
698 if (ds->drv->get_regs)
699 ds->drv->get_regs(ds, p->port, regs, _p);
700 }
701
702 static int dsa_slave_nway_reset(struct net_device *dev)
703 {
704 struct dsa_slave_priv *p = netdev_priv(dev);
705
706 if (p->phy != NULL)
707 return genphy_restart_aneg(p->phy);
708
709 return -EOPNOTSUPP;
710 }
711
712 static u32 dsa_slave_get_link(struct net_device *dev)
713 {
714 struct dsa_slave_priv *p = netdev_priv(dev);
715
716 if (p->phy != NULL) {
717 genphy_update_link(p->phy);
718 return p->phy->link;
719 }
720
721 return -EOPNOTSUPP;
722 }
723
724 static int dsa_slave_get_eeprom_len(struct net_device *dev)
725 {
726 struct dsa_slave_priv *p = netdev_priv(dev);
727 struct dsa_switch *ds = p->parent;
728
729 if (ds->pd->eeprom_len)
730 return ds->pd->eeprom_len;
731
732 if (ds->drv->get_eeprom_len)
733 return ds->drv->get_eeprom_len(ds);
734
735 return 0;
736 }
737
738 static int dsa_slave_get_eeprom(struct net_device *dev,
739 struct ethtool_eeprom *eeprom, u8 *data)
740 {
741 struct dsa_slave_priv *p = netdev_priv(dev);
742 struct dsa_switch *ds = p->parent;
743
744 if (ds->drv->get_eeprom)
745 return ds->drv->get_eeprom(ds, eeprom, data);
746
747 return -EOPNOTSUPP;
748 }
749
750 static int dsa_slave_set_eeprom(struct net_device *dev,
751 struct ethtool_eeprom *eeprom, u8 *data)
752 {
753 struct dsa_slave_priv *p = netdev_priv(dev);
754 struct dsa_switch *ds = p->parent;
755
756 if (ds->drv->set_eeprom)
757 return ds->drv->set_eeprom(ds, eeprom, data);
758
759 return -EOPNOTSUPP;
760 }
761
762 static void dsa_slave_get_strings(struct net_device *dev,
763 uint32_t stringset, uint8_t *data)
764 {
765 struct dsa_slave_priv *p = netdev_priv(dev);
766 struct dsa_switch *ds = p->parent;
767
768 if (stringset == ETH_SS_STATS) {
769 int len = ETH_GSTRING_LEN;
770
771 strncpy(data, "tx_packets", len);
772 strncpy(data + len, "tx_bytes", len);
773 strncpy(data + 2 * len, "rx_packets", len);
774 strncpy(data + 3 * len, "rx_bytes", len);
775 if (ds->drv->get_strings != NULL)
776 ds->drv->get_strings(ds, p->port, data + 4 * len);
777 }
778 }
779
780 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
781 struct ethtool_stats *stats,
782 uint64_t *data)
783 {
784 struct dsa_slave_priv *p = netdev_priv(dev);
785 struct dsa_switch *ds = p->parent;
786
787 data[0] = p->dev->stats.tx_packets;
788 data[1] = p->dev->stats.tx_bytes;
789 data[2] = p->dev->stats.rx_packets;
790 data[3] = p->dev->stats.rx_bytes;
791 if (ds->drv->get_ethtool_stats != NULL)
792 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
793 }
794
795 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
796 {
797 struct dsa_slave_priv *p = netdev_priv(dev);
798 struct dsa_switch *ds = p->parent;
799
800 if (sset == ETH_SS_STATS) {
801 int count;
802
803 count = 4;
804 if (ds->drv->get_sset_count != NULL)
805 count += ds->drv->get_sset_count(ds);
806
807 return count;
808 }
809
810 return -EOPNOTSUPP;
811 }
812
813 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
814 {
815 struct dsa_slave_priv *p = netdev_priv(dev);
816 struct dsa_switch *ds = p->parent;
817
818 if (ds->drv->get_wol)
819 ds->drv->get_wol(ds, p->port, w);
820 }
821
822 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
823 {
824 struct dsa_slave_priv *p = netdev_priv(dev);
825 struct dsa_switch *ds = p->parent;
826 int ret = -EOPNOTSUPP;
827
828 if (ds->drv->set_wol)
829 ret = ds->drv->set_wol(ds, p->port, w);
830
831 return ret;
832 }
833
834 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
835 {
836 struct dsa_slave_priv *p = netdev_priv(dev);
837 struct dsa_switch *ds = p->parent;
838 int ret;
839
840 if (!ds->drv->set_eee)
841 return -EOPNOTSUPP;
842
843 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
844 if (ret)
845 return ret;
846
847 if (p->phy)
848 ret = phy_ethtool_set_eee(p->phy, e);
849
850 return ret;
851 }
852
853 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
854 {
855 struct dsa_slave_priv *p = netdev_priv(dev);
856 struct dsa_switch *ds = p->parent;
857 int ret;
858
859 if (!ds->drv->get_eee)
860 return -EOPNOTSUPP;
861
862 ret = ds->drv->get_eee(ds, p->port, e);
863 if (ret)
864 return ret;
865
866 if (p->phy)
867 ret = phy_ethtool_get_eee(p->phy, e);
868
869 return ret;
870 }
871
872 #ifdef CONFIG_NET_POLL_CONTROLLER
873 static int dsa_slave_netpoll_setup(struct net_device *dev,
874 struct netpoll_info *ni)
875 {
876 struct dsa_slave_priv *p = netdev_priv(dev);
877 struct dsa_switch *ds = p->parent;
878 struct net_device *master = ds->dst->master_netdev;
879 struct netpoll *netpoll;
880 int err = 0;
881
882 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
883 if (!netpoll)
884 return -ENOMEM;
885
886 err = __netpoll_setup(netpoll, master);
887 if (err) {
888 kfree(netpoll);
889 goto out;
890 }
891
892 p->netpoll = netpoll;
893 out:
894 return err;
895 }
896
897 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
898 {
899 struct dsa_slave_priv *p = netdev_priv(dev);
900 struct netpoll *netpoll = p->netpoll;
901
902 if (!netpoll)
903 return;
904
905 p->netpoll = NULL;
906
907 __netpoll_free_async(netpoll);
908 }
909
910 static void dsa_slave_poll_controller(struct net_device *dev)
911 {
912 }
913 #endif
914
915 static const struct ethtool_ops dsa_slave_ethtool_ops = {
916 .get_settings = dsa_slave_get_settings,
917 .set_settings = dsa_slave_set_settings,
918 .get_drvinfo = dsa_slave_get_drvinfo,
919 .get_regs_len = dsa_slave_get_regs_len,
920 .get_regs = dsa_slave_get_regs,
921 .nway_reset = dsa_slave_nway_reset,
922 .get_link = dsa_slave_get_link,
923 .get_eeprom_len = dsa_slave_get_eeprom_len,
924 .get_eeprom = dsa_slave_get_eeprom,
925 .set_eeprom = dsa_slave_set_eeprom,
926 .get_strings = dsa_slave_get_strings,
927 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
928 .get_sset_count = dsa_slave_get_sset_count,
929 .set_wol = dsa_slave_set_wol,
930 .get_wol = dsa_slave_get_wol,
931 .set_eee = dsa_slave_set_eee,
932 .get_eee = dsa_slave_get_eee,
933 };
934
935 static const struct net_device_ops dsa_slave_netdev_ops = {
936 .ndo_open = dsa_slave_open,
937 .ndo_stop = dsa_slave_close,
938 .ndo_start_xmit = dsa_slave_xmit,
939 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
940 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
941 .ndo_set_mac_address = dsa_slave_set_mac_address,
942 .ndo_fdb_add = switchdev_port_fdb_add,
943 .ndo_fdb_del = switchdev_port_fdb_del,
944 .ndo_fdb_dump = switchdev_port_fdb_dump,
945 .ndo_do_ioctl = dsa_slave_ioctl,
946 .ndo_get_iflink = dsa_slave_get_iflink,
947 #ifdef CONFIG_NET_POLL_CONTROLLER
948 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
949 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
950 .ndo_poll_controller = dsa_slave_poll_controller,
951 #endif
952 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
953 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
954 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
955 };
956
957 static const struct switchdev_ops dsa_slave_switchdev_ops = {
958 .switchdev_port_attr_get = dsa_slave_port_attr_get,
959 .switchdev_port_attr_set = dsa_slave_port_attr_set,
960 .switchdev_port_obj_add = dsa_slave_port_obj_add,
961 .switchdev_port_obj_del = dsa_slave_port_obj_del,
962 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
963 };
964
965 static void dsa_slave_adjust_link(struct net_device *dev)
966 {
967 struct dsa_slave_priv *p = netdev_priv(dev);
968 struct dsa_switch *ds = p->parent;
969 unsigned int status_changed = 0;
970
971 if (p->old_link != p->phy->link) {
972 status_changed = 1;
973 p->old_link = p->phy->link;
974 }
975
976 if (p->old_duplex != p->phy->duplex) {
977 status_changed = 1;
978 p->old_duplex = p->phy->duplex;
979 }
980
981 if (p->old_pause != p->phy->pause) {
982 status_changed = 1;
983 p->old_pause = p->phy->pause;
984 }
985
986 if (ds->drv->adjust_link && status_changed)
987 ds->drv->adjust_link(ds, p->port, p->phy);
988
989 if (status_changed)
990 phy_print_status(p->phy);
991 }
992
993 static int dsa_slave_fixed_link_update(struct net_device *dev,
994 struct fixed_phy_status *status)
995 {
996 struct dsa_slave_priv *p = netdev_priv(dev);
997 struct dsa_switch *ds = p->parent;
998
999 if (ds->drv->fixed_link_update)
1000 ds->drv->fixed_link_update(ds, p->port, status);
1001
1002 return 0;
1003 }
1004
1005 /* slave device setup *******************************************************/
1006 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
1007 struct net_device *slave_dev,
1008 int addr)
1009 {
1010 struct dsa_switch *ds = p->parent;
1011
1012 p->phy = ds->slave_mii_bus->phy_map[addr];
1013 if (!p->phy)
1014 return -ENODEV;
1015
1016 /* Use already configured phy mode */
1017 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1018 p->phy_interface = p->phy->interface;
1019 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
1020 p->phy_interface);
1021
1022 return 0;
1023 }
1024
1025 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
1026 struct net_device *slave_dev)
1027 {
1028 struct dsa_switch *ds = p->parent;
1029 struct dsa_chip_data *cd = ds->pd;
1030 struct device_node *phy_dn, *port_dn;
1031 bool phy_is_fixed = false;
1032 u32 phy_flags = 0;
1033 int mode, ret;
1034
1035 port_dn = cd->port_dn[p->port];
1036 mode = of_get_phy_mode(port_dn);
1037 if (mode < 0)
1038 mode = PHY_INTERFACE_MODE_NA;
1039 p->phy_interface = mode;
1040
1041 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1042 if (of_phy_is_fixed_link(port_dn)) {
1043 /* In the case of a fixed PHY, the DT node associated
1044 * to the fixed PHY is the Port DT node
1045 */
1046 ret = of_phy_register_fixed_link(port_dn);
1047 if (ret) {
1048 netdev_err(slave_dev, "failed to register fixed PHY\n");
1049 return ret;
1050 }
1051 phy_is_fixed = true;
1052 phy_dn = port_dn;
1053 }
1054
1055 if (ds->drv->get_phy_flags)
1056 phy_flags = ds->drv->get_phy_flags(ds, p->port);
1057
1058 if (phy_dn) {
1059 ret = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
1060 /* If this PHY address is part of phys_mii_mask, which means
1061 * that we need to divert reads and writes to/from it, then we
1062 * want to bind this device using the slave MII bus created by
1063 * DSA to make that happen.
1064 */
1065 if (!phy_is_fixed && ret >= 0 &&
1066 (ds->phys_mii_mask & (1 << ret))) {
1067 ret = dsa_slave_phy_connect(p, slave_dev, ret);
1068 if (ret)
1069 return ret;
1070 } else {
1071 p->phy = of_phy_connect(slave_dev, phy_dn,
1072 dsa_slave_adjust_link,
1073 phy_flags,
1074 p->phy_interface);
1075 }
1076 }
1077
1078 if (p->phy && phy_is_fixed)
1079 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
1080
1081 /* We could not connect to a designated PHY, so use the switch internal
1082 * MDIO bus instead
1083 */
1084 if (!p->phy) {
1085 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
1086 if (ret)
1087 return ret;
1088 } else {
1089 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
1090 p->phy->addr, p->phy->drv->name);
1091 }
1092
1093 return 0;
1094 }
1095
1096 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1097 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1098 struct netdev_queue *txq,
1099 void *_unused)
1100 {
1101 lockdep_set_class(&txq->_xmit_lock,
1102 &dsa_slave_netdev_xmit_lock_key);
1103 }
1104
1105 int dsa_slave_suspend(struct net_device *slave_dev)
1106 {
1107 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1108
1109 if (p->phy) {
1110 phy_stop(p->phy);
1111 p->old_pause = -1;
1112 p->old_link = -1;
1113 p->old_duplex = -1;
1114 phy_suspend(p->phy);
1115 }
1116
1117 return 0;
1118 }
1119
1120 int dsa_slave_resume(struct net_device *slave_dev)
1121 {
1122 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1123
1124 netif_device_attach(slave_dev);
1125
1126 if (p->phy) {
1127 phy_resume(p->phy);
1128 phy_start(p->phy);
1129 }
1130
1131 return 0;
1132 }
1133
1134 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1135 int port, char *name)
1136 {
1137 struct net_device *master = ds->dst->master_netdev;
1138 struct net_device *slave_dev;
1139 struct dsa_slave_priv *p;
1140 int ret;
1141
1142 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1143 NET_NAME_UNKNOWN, ether_setup);
1144 if (slave_dev == NULL)
1145 return -ENOMEM;
1146
1147 slave_dev->features = master->vlan_features;
1148 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1149 eth_hw_addr_inherit(slave_dev, master);
1150 slave_dev->priv_flags |= IFF_NO_QUEUE;
1151 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1152 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1153
1154 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1155 NULL);
1156
1157 SET_NETDEV_DEV(slave_dev, parent);
1158 slave_dev->dev.of_node = ds->pd->port_dn[port];
1159 slave_dev->vlan_features = master->vlan_features;
1160
1161 p = netdev_priv(slave_dev);
1162 p->dev = slave_dev;
1163 p->parent = ds;
1164 p->port = port;
1165
1166 switch (ds->dst->tag_protocol) {
1167 #ifdef CONFIG_NET_DSA_TAG_DSA
1168 case DSA_TAG_PROTO_DSA:
1169 p->xmit = dsa_netdev_ops.xmit;
1170 break;
1171 #endif
1172 #ifdef CONFIG_NET_DSA_TAG_EDSA
1173 case DSA_TAG_PROTO_EDSA:
1174 p->xmit = edsa_netdev_ops.xmit;
1175 break;
1176 #endif
1177 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1178 case DSA_TAG_PROTO_TRAILER:
1179 p->xmit = trailer_netdev_ops.xmit;
1180 break;
1181 #endif
1182 #ifdef CONFIG_NET_DSA_TAG_BRCM
1183 case DSA_TAG_PROTO_BRCM:
1184 p->xmit = brcm_netdev_ops.xmit;
1185 break;
1186 #endif
1187 default:
1188 p->xmit = dsa_slave_notag_xmit;
1189 break;
1190 }
1191
1192 p->old_pause = -1;
1193 p->old_link = -1;
1194 p->old_duplex = -1;
1195
1196 ret = dsa_slave_phy_setup(p, slave_dev);
1197 if (ret) {
1198 free_netdev(slave_dev);
1199 return ret;
1200 }
1201
1202 ds->ports[port] = slave_dev;
1203 ret = register_netdev(slave_dev);
1204 if (ret) {
1205 netdev_err(master, "error %d registering interface %s\n",
1206 ret, slave_dev->name);
1207 phy_disconnect(p->phy);
1208 ds->ports[port] = NULL;
1209 free_netdev(slave_dev);
1210 return ret;
1211 }
1212
1213 netif_carrier_off(slave_dev);
1214
1215 return 0;
1216 }
1217
1218 static bool dsa_slave_dev_check(struct net_device *dev)
1219 {
1220 return dev->netdev_ops == &dsa_slave_netdev_ops;
1221 }
1222
1223 static int dsa_slave_master_changed(struct net_device *dev)
1224 {
1225 struct net_device *master = netdev_master_upper_dev_get(dev);
1226 struct dsa_slave_priv *p = netdev_priv(dev);
1227 int err = 0;
1228
1229 if (master && master->rtnl_link_ops &&
1230 !strcmp(master->rtnl_link_ops->kind, "bridge"))
1231 err = dsa_slave_bridge_port_join(dev, master);
1232 else if (dsa_port_is_bridged(p))
1233 err = dsa_slave_bridge_port_leave(dev);
1234
1235 return err;
1236 }
1237
1238 int dsa_slave_netdevice_event(struct notifier_block *unused,
1239 unsigned long event, void *ptr)
1240 {
1241 struct net_device *dev;
1242 int err = 0;
1243
1244 switch (event) {
1245 case NETDEV_CHANGEUPPER:
1246 dev = netdev_notifier_info_to_dev(ptr);
1247 if (!dsa_slave_dev_check(dev))
1248 goto out;
1249
1250 err = dsa_slave_master_changed(dev);
1251 if (err)
1252 netdev_warn(dev, "failed to reflect master change\n");
1253
1254 break;
1255 }
1256
1257 out:
1258 return NOTIFY_DONE;
1259 }
Linux kernel - Deliverables
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