projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
switchdev: introduce transaction item queue for attr_set and obj_add
[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_ph) {
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_ph == SWITCHDEV_TRANS_PREPARE)
358 ret = ds->drv->port_fdb_add ? 0 : -EOPNOTSUPP;
359 else if (obj->trans_ph == 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 struct switchdev_trans *trans)
461 {
462 int ret = 0;
463
464 switch (attr->id) {
465 case SWITCHDEV_ATTR_PORT_STP_STATE:
466 if (attr->trans_ph == SWITCHDEV_TRANS_COMMIT)
467 ret = dsa_slave_stp_update(dev, attr->u.stp_state);
468 break;
469 default:
470 ret = -EOPNOTSUPP;
471 break;
472 }
473
474 return ret;
475 }
476
477 static int dsa_slave_port_obj_add(struct net_device *dev,
478 struct switchdev_obj *obj,
479 struct switchdev_trans *trans)
480 {
481 int err;
482
483 /* For the prepare phase, ensure the full set of changes is feasable in
484 * one go in order to signal a failure properly. If an operation is not
485 * supported, return -EOPNOTSUPP.
486 */
487
488 switch (obj->id) {
489 case SWITCHDEV_OBJ_PORT_FDB:
490 err = dsa_slave_port_fdb_add(dev, obj);
491 break;
492 case SWITCHDEV_OBJ_PORT_VLAN:
493 err = dsa_slave_port_vlan_add(dev, obj);
494 break;
495 default:
496 err = -EOPNOTSUPP;
497 break;
498 }
499
500 return err;
501 }
502
503 static int dsa_slave_port_obj_del(struct net_device *dev,
504 struct switchdev_obj *obj)
505 {
506 int err;
507
508 switch (obj->id) {
509 case SWITCHDEV_OBJ_PORT_FDB:
510 err = dsa_slave_port_fdb_del(dev, obj);
511 break;
512 case SWITCHDEV_OBJ_PORT_VLAN:
513 err = dsa_slave_port_vlan_del(dev, obj);
514 break;
515 default:
516 err = -EOPNOTSUPP;
517 break;
518 }
519
520 return err;
521 }
522
523 static int dsa_slave_port_obj_dump(struct net_device *dev,
524 struct switchdev_obj *obj)
525 {
526 int err;
527
528 switch (obj->id) {
529 case SWITCHDEV_OBJ_PORT_FDB:
530 err = dsa_slave_port_fdb_dump(dev, obj);
531 break;
532 case SWITCHDEV_OBJ_PORT_VLAN:
533 err = dsa_slave_port_vlan_dump(dev, obj);
534 break;
535 default:
536 err = -EOPNOTSUPP;
537 break;
538 }
539
540 return err;
541 }
542
543 static int dsa_slave_bridge_port_join(struct net_device *dev,
544 struct net_device *br)
545 {
546 struct dsa_slave_priv *p = netdev_priv(dev);
547 struct dsa_switch *ds = p->parent;
548 int ret = -EOPNOTSUPP;
549
550 p->bridge_dev = br;
551
552 if (ds->drv->port_join_bridge)
553 ret = ds->drv->port_join_bridge(ds, p->port,
554 dsa_slave_br_port_mask(ds, br));
555
556 return ret;
557 }
558
559 static int dsa_slave_bridge_port_leave(struct net_device *dev)
560 {
561 struct dsa_slave_priv *p = netdev_priv(dev);
562 struct dsa_switch *ds = p->parent;
563 int ret = -EOPNOTSUPP;
564
565
566 if (ds->drv->port_leave_bridge)
567 ret = ds->drv->port_leave_bridge(ds, p->port,
568 dsa_slave_br_port_mask(ds, p->bridge_dev));
569
570 p->bridge_dev = NULL;
571
572 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
573 * so allow it to be in BR_STATE_FORWARDING to be kept functional
574 */
575 dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
576
577 return ret;
578 }
579
580 static int dsa_slave_port_attr_get(struct net_device *dev,
581 struct switchdev_attr *attr)
582 {
583 struct dsa_slave_priv *p = netdev_priv(dev);
584 struct dsa_switch *ds = p->parent;
585
586 switch (attr->id) {
587 case SWITCHDEV_ATTR_PORT_PARENT_ID:
588 attr->u.ppid.id_len = sizeof(ds->index);
589 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
590 break;
591 default:
592 return -EOPNOTSUPP;
593 }
594
595 return 0;
596 }
597
598 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
599 struct sk_buff *skb)
600 {
601 #ifdef CONFIG_NET_POLL_CONTROLLER
602 if (p->netpoll)
603 netpoll_send_skb(p->netpoll, skb);
604 #else
605 BUG();
606 #endif
607 return NETDEV_TX_OK;
608 }
609
610 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
611 {
612 struct dsa_slave_priv *p = netdev_priv(dev);
613 struct sk_buff *nskb;
614
615 dev->stats.tx_packets++;
616 dev->stats.tx_bytes += skb->len;
617
618 /* Transmit function may have to reallocate the original SKB */
619 nskb = p->xmit(skb, dev);
620 if (!nskb)
621 return NETDEV_TX_OK;
622
623 /* SKB for netpoll still need to be mangled with the protocol-specific
624 * tag to be successfully transmitted
625 */
626 if (unlikely(netpoll_tx_running(dev)))
627 return dsa_netpoll_send_skb(p, nskb);
628
629 /* Queue the SKB for transmission on the parent interface, but
630 * do not modify its EtherType
631 */
632 nskb->dev = p->parent->dst->master_netdev;
633 dev_queue_xmit(nskb);
634
635 return NETDEV_TX_OK;
636 }
637
638 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
639 struct net_device *dev)
640 {
641 /* Just return the original SKB */
642 return skb;
643 }
644
645
646 /* ethtool operations *******************************************************/
647 static int
648 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
649 {
650 struct dsa_slave_priv *p = netdev_priv(dev);
651 int err;
652
653 err = -EOPNOTSUPP;
654 if (p->phy != NULL) {
655 err = phy_read_status(p->phy);
656 if (err == 0)
657 err = phy_ethtool_gset(p->phy, cmd);
658 }
659
660 return err;
661 }
662
663 static int
664 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
665 {
666 struct dsa_slave_priv *p = netdev_priv(dev);
667
668 if (p->phy != NULL)
669 return phy_ethtool_sset(p->phy, cmd);
670
671 return -EOPNOTSUPP;
672 }
673
674 static void dsa_slave_get_drvinfo(struct net_device *dev,
675 struct ethtool_drvinfo *drvinfo)
676 {
677 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
678 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
679 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
680 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
681 }
682
683 static int dsa_slave_get_regs_len(struct net_device *dev)
684 {
685 struct dsa_slave_priv *p = netdev_priv(dev);
686 struct dsa_switch *ds = p->parent;
687
688 if (ds->drv->get_regs_len)
689 return ds->drv->get_regs_len(ds, p->port);
690
691 return -EOPNOTSUPP;
692 }
693
694 static void
695 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
696 {
697 struct dsa_slave_priv *p = netdev_priv(dev);
698 struct dsa_switch *ds = p->parent;
699
700 if (ds->drv->get_regs)
701 ds->drv->get_regs(ds, p->port, regs, _p);
702 }
703
704 static int dsa_slave_nway_reset(struct net_device *dev)
705 {
706 struct dsa_slave_priv *p = netdev_priv(dev);
707
708 if (p->phy != NULL)
709 return genphy_restart_aneg(p->phy);
710
711 return -EOPNOTSUPP;
712 }
713
714 static u32 dsa_slave_get_link(struct net_device *dev)
715 {
716 struct dsa_slave_priv *p = netdev_priv(dev);
717
718 if (p->phy != NULL) {
719 genphy_update_link(p->phy);
720 return p->phy->link;
721 }
722
723 return -EOPNOTSUPP;
724 }
725
726 static int dsa_slave_get_eeprom_len(struct net_device *dev)
727 {
728 struct dsa_slave_priv *p = netdev_priv(dev);
729 struct dsa_switch *ds = p->parent;
730
731 if (ds->pd->eeprom_len)
732 return ds->pd->eeprom_len;
733
734 if (ds->drv->get_eeprom_len)
735 return ds->drv->get_eeprom_len(ds);
736
737 return 0;
738 }
739
740 static int dsa_slave_get_eeprom(struct net_device *dev,
741 struct ethtool_eeprom *eeprom, u8 *data)
742 {
743 struct dsa_slave_priv *p = netdev_priv(dev);
744 struct dsa_switch *ds = p->parent;
745
746 if (ds->drv->get_eeprom)
747 return ds->drv->get_eeprom(ds, eeprom, data);
748
749 return -EOPNOTSUPP;
750 }
751
752 static int dsa_slave_set_eeprom(struct net_device *dev,
753 struct ethtool_eeprom *eeprom, u8 *data)
754 {
755 struct dsa_slave_priv *p = netdev_priv(dev);
756 struct dsa_switch *ds = p->parent;
757
758 if (ds->drv->set_eeprom)
759 return ds->drv->set_eeprom(ds, eeprom, data);
760
761 return -EOPNOTSUPP;
762 }
763
764 static void dsa_slave_get_strings(struct net_device *dev,
765 uint32_t stringset, uint8_t *data)
766 {
767 struct dsa_slave_priv *p = netdev_priv(dev);
768 struct dsa_switch *ds = p->parent;
769
770 if (stringset == ETH_SS_STATS) {
771 int len = ETH_GSTRING_LEN;
772
773 strncpy(data, "tx_packets", len);
774 strncpy(data + len, "tx_bytes", len);
775 strncpy(data + 2 * len, "rx_packets", len);
776 strncpy(data + 3 * len, "rx_bytes", len);
777 if (ds->drv->get_strings != NULL)
778 ds->drv->get_strings(ds, p->port, data + 4 * len);
779 }
780 }
781
782 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
783 struct ethtool_stats *stats,
784 uint64_t *data)
785 {
786 struct dsa_slave_priv *p = netdev_priv(dev);
787 struct dsa_switch *ds = p->parent;
788
789 data[0] = p->dev->stats.tx_packets;
790 data[1] = p->dev->stats.tx_bytes;
791 data[2] = p->dev->stats.rx_packets;
792 data[3] = p->dev->stats.rx_bytes;
793 if (ds->drv->get_ethtool_stats != NULL)
794 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
795 }
796
797 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
798 {
799 struct dsa_slave_priv *p = netdev_priv(dev);
800 struct dsa_switch *ds = p->parent;
801
802 if (sset == ETH_SS_STATS) {
803 int count;
804
805 count = 4;
806 if (ds->drv->get_sset_count != NULL)
807 count += ds->drv->get_sset_count(ds);
808
809 return count;
810 }
811
812 return -EOPNOTSUPP;
813 }
814
815 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
816 {
817 struct dsa_slave_priv *p = netdev_priv(dev);
818 struct dsa_switch *ds = p->parent;
819
820 if (ds->drv->get_wol)
821 ds->drv->get_wol(ds, p->port, w);
822 }
823
824 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
825 {
826 struct dsa_slave_priv *p = netdev_priv(dev);
827 struct dsa_switch *ds = p->parent;
828 int ret = -EOPNOTSUPP;
829
830 if (ds->drv->set_wol)
831 ret = ds->drv->set_wol(ds, p->port, w);
832
833 return ret;
834 }
835
836 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
837 {
838 struct dsa_slave_priv *p = netdev_priv(dev);
839 struct dsa_switch *ds = p->parent;
840 int ret;
841
842 if (!ds->drv->set_eee)
843 return -EOPNOTSUPP;
844
845 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
846 if (ret)
847 return ret;
848
849 if (p->phy)
850 ret = phy_ethtool_set_eee(p->phy, e);
851
852 return ret;
853 }
854
855 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
856 {
857 struct dsa_slave_priv *p = netdev_priv(dev);
858 struct dsa_switch *ds = p->parent;
859 int ret;
860
861 if (!ds->drv->get_eee)
862 return -EOPNOTSUPP;
863
864 ret = ds->drv->get_eee(ds, p->port, e);
865 if (ret)
866 return ret;
867
868 if (p->phy)
869 ret = phy_ethtool_get_eee(p->phy, e);
870
871 return ret;
872 }
873
874 #ifdef CONFIG_NET_POLL_CONTROLLER
875 static int dsa_slave_netpoll_setup(struct net_device *dev,
876 struct netpoll_info *ni)
877 {
878 struct dsa_slave_priv *p = netdev_priv(dev);
879 struct dsa_switch *ds = p->parent;
880 struct net_device *master = ds->dst->master_netdev;
881 struct netpoll *netpoll;
882 int err = 0;
883
884 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
885 if (!netpoll)
886 return -ENOMEM;
887
888 err = __netpoll_setup(netpoll, master);
889 if (err) {
890 kfree(netpoll);
891 goto out;
892 }
893
894 p->netpoll = netpoll;
895 out:
896 return err;
897 }
898
899 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
900 {
901 struct dsa_slave_priv *p = netdev_priv(dev);
902 struct netpoll *netpoll = p->netpoll;
903
904 if (!netpoll)
905 return;
906
907 p->netpoll = NULL;
908
909 __netpoll_free_async(netpoll);
910 }
911
912 static void dsa_slave_poll_controller(struct net_device *dev)
913 {
914 }
915 #endif
916
917 static const struct ethtool_ops dsa_slave_ethtool_ops = {
918 .get_settings = dsa_slave_get_settings,
919 .set_settings = dsa_slave_set_settings,
920 .get_drvinfo = dsa_slave_get_drvinfo,
921 .get_regs_len = dsa_slave_get_regs_len,
922 .get_regs = dsa_slave_get_regs,
923 .nway_reset = dsa_slave_nway_reset,
924 .get_link = dsa_slave_get_link,
925 .get_eeprom_len = dsa_slave_get_eeprom_len,
926 .get_eeprom = dsa_slave_get_eeprom,
927 .set_eeprom = dsa_slave_set_eeprom,
928 .get_strings = dsa_slave_get_strings,
929 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
930 .get_sset_count = dsa_slave_get_sset_count,
931 .set_wol = dsa_slave_set_wol,
932 .get_wol = dsa_slave_get_wol,
933 .set_eee = dsa_slave_set_eee,
934 .get_eee = dsa_slave_get_eee,
935 };
936
937 static const struct net_device_ops dsa_slave_netdev_ops = {
938 .ndo_open = dsa_slave_open,
939 .ndo_stop = dsa_slave_close,
940 .ndo_start_xmit = dsa_slave_xmit,
941 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
942 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
943 .ndo_set_mac_address = dsa_slave_set_mac_address,
944 .ndo_fdb_add = switchdev_port_fdb_add,
945 .ndo_fdb_del = switchdev_port_fdb_del,
946 .ndo_fdb_dump = switchdev_port_fdb_dump,
947 .ndo_do_ioctl = dsa_slave_ioctl,
948 .ndo_get_iflink = dsa_slave_get_iflink,
949 #ifdef CONFIG_NET_POLL_CONTROLLER
950 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
951 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
952 .ndo_poll_controller = dsa_slave_poll_controller,
953 #endif
954 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
955 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
956 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
957 };
958
959 static const struct switchdev_ops dsa_slave_switchdev_ops = {
960 .switchdev_port_attr_get = dsa_slave_port_attr_get,
961 .switchdev_port_attr_set = dsa_slave_port_attr_set,
962 .switchdev_port_obj_add = dsa_slave_port_obj_add,
963 .switchdev_port_obj_del = dsa_slave_port_obj_del,
964 .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
965 };
966
967 static void dsa_slave_adjust_link(struct net_device *dev)
968 {
969 struct dsa_slave_priv *p = netdev_priv(dev);
970 struct dsa_switch *ds = p->parent;
971 unsigned int status_changed = 0;
972
973 if (p->old_link != p->phy->link) {
974 status_changed = 1;
975 p->old_link = p->phy->link;
976 }
977
978 if (p->old_duplex != p->phy->duplex) {
979 status_changed = 1;
980 p->old_duplex = p->phy->duplex;
981 }
982
983 if (p->old_pause != p->phy->pause) {
984 status_changed = 1;
985 p->old_pause = p->phy->pause;
986 }
987
988 if (ds->drv->adjust_link && status_changed)
989 ds->drv->adjust_link(ds, p->port, p->phy);
990
991 if (status_changed)
992 phy_print_status(p->phy);
993 }
994
995 static int dsa_slave_fixed_link_update(struct net_device *dev,
996 struct fixed_phy_status *status)
997 {
998 struct dsa_slave_priv *p = netdev_priv(dev);
999 struct dsa_switch *ds = p->parent;
1000
1001 if (ds->drv->fixed_link_update)
1002 ds->drv->fixed_link_update(ds, p->port, status);
1003
1004 return 0;
1005 }
1006
1007 /* slave device setup *******************************************************/
1008 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
1009 struct net_device *slave_dev,
1010 int addr)
1011 {
1012 struct dsa_switch *ds = p->parent;
1013
1014 p->phy = ds->slave_mii_bus->phy_map[addr];
1015 if (!p->phy)
1016 return -ENODEV;
1017
1018 /* Use already configured phy mode */
1019 if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1020 p->phy_interface = p->phy->interface;
1021 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
1022 p->phy_interface);
1023
1024 return 0;
1025 }
1026
1027 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
1028 struct net_device *slave_dev)
1029 {
1030 struct dsa_switch *ds = p->parent;
1031 struct dsa_chip_data *cd = ds->pd;
1032 struct device_node *phy_dn, *port_dn;
1033 bool phy_is_fixed = false;
1034 u32 phy_flags = 0;
1035 int mode, ret;
1036
1037 port_dn = cd->port_dn[p->port];
1038 mode = of_get_phy_mode(port_dn);
1039 if (mode < 0)
1040 mode = PHY_INTERFACE_MODE_NA;
1041 p->phy_interface = mode;
1042
1043 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1044 if (of_phy_is_fixed_link(port_dn)) {
1045 /* In the case of a fixed PHY, the DT node associated
1046 * to the fixed PHY is the Port DT node
1047 */
1048 ret = of_phy_register_fixed_link(port_dn);
1049 if (ret) {
1050 netdev_err(slave_dev, "failed to register fixed PHY\n");
1051 return ret;
1052 }
1053 phy_is_fixed = true;
1054 phy_dn = port_dn;
1055 }
1056
1057 if (ds->drv->get_phy_flags)
1058 phy_flags = ds->drv->get_phy_flags(ds, p->port);
1059
1060 if (phy_dn) {
1061 ret = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
1062 /* If this PHY address is part of phys_mii_mask, which means
1063 * that we need to divert reads and writes to/from it, then we
1064 * want to bind this device using the slave MII bus created by
1065 * DSA to make that happen.
1066 */
1067 if (!phy_is_fixed && ret >= 0 &&
1068 (ds->phys_mii_mask & (1 << ret))) {
1069 ret = dsa_slave_phy_connect(p, slave_dev, ret);
1070 if (ret)
1071 return ret;
1072 } else {
1073 p->phy = of_phy_connect(slave_dev, phy_dn,
1074 dsa_slave_adjust_link,
1075 phy_flags,
1076 p->phy_interface);
1077 }
1078 }
1079
1080 if (p->phy && phy_is_fixed)
1081 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
1082
1083 /* We could not connect to a designated PHY, so use the switch internal
1084 * MDIO bus instead
1085 */
1086 if (!p->phy) {
1087 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
1088 if (ret)
1089 return ret;
1090 } else {
1091 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
1092 p->phy->addr, p->phy->drv->name);
1093 }
1094
1095 return 0;
1096 }
1097
1098 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1099 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1100 struct netdev_queue *txq,
1101 void *_unused)
1102 {
1103 lockdep_set_class(&txq->_xmit_lock,
1104 &dsa_slave_netdev_xmit_lock_key);
1105 }
1106
1107 int dsa_slave_suspend(struct net_device *slave_dev)
1108 {
1109 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1110
1111 if (p->phy) {
1112 phy_stop(p->phy);
1113 p->old_pause = -1;
1114 p->old_link = -1;
1115 p->old_duplex = -1;
1116 phy_suspend(p->phy);
1117 }
1118
1119 return 0;
1120 }
1121
1122 int dsa_slave_resume(struct net_device *slave_dev)
1123 {
1124 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1125
1126 netif_device_attach(slave_dev);
1127
1128 if (p->phy) {
1129 phy_resume(p->phy);
1130 phy_start(p->phy);
1131 }
1132
1133 return 0;
1134 }
1135
1136 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1137 int port, char *name)
1138 {
1139 struct net_device *master = ds->dst->master_netdev;
1140 struct net_device *slave_dev;
1141 struct dsa_slave_priv *p;
1142 int ret;
1143
1144 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1145 NET_NAME_UNKNOWN, ether_setup);
1146 if (slave_dev == NULL)
1147 return -ENOMEM;
1148
1149 slave_dev->features = master->vlan_features;
1150 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1151 eth_hw_addr_inherit(slave_dev, master);
1152 slave_dev->priv_flags |= IFF_NO_QUEUE;
1153 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1154 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1155
1156 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1157 NULL);
1158
1159 SET_NETDEV_DEV(slave_dev, parent);
1160 slave_dev->dev.of_node = ds->pd->port_dn[port];
1161 slave_dev->vlan_features = master->vlan_features;
1162
1163 p = netdev_priv(slave_dev);
1164 p->dev = slave_dev;
1165 p->parent = ds;
1166 p->port = port;
1167
1168 switch (ds->dst->tag_protocol) {
1169 #ifdef CONFIG_NET_DSA_TAG_DSA
1170 case DSA_TAG_PROTO_DSA:
1171 p->xmit = dsa_netdev_ops.xmit;
1172 break;
1173 #endif
1174 #ifdef CONFIG_NET_DSA_TAG_EDSA
1175 case DSA_TAG_PROTO_EDSA:
1176 p->xmit = edsa_netdev_ops.xmit;
1177 break;
1178 #endif
1179 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1180 case DSA_TAG_PROTO_TRAILER:
1181 p->xmit = trailer_netdev_ops.xmit;
1182 break;
1183 #endif
1184 #ifdef CONFIG_NET_DSA_TAG_BRCM
1185 case DSA_TAG_PROTO_BRCM:
1186 p->xmit = brcm_netdev_ops.xmit;
1187 break;
1188 #endif
1189 default:
1190 p->xmit = dsa_slave_notag_xmit;
1191 break;
1192 }
1193
1194 p->old_pause = -1;
1195 p->old_link = -1;
1196 p->old_duplex = -1;
1197
1198 ret = dsa_slave_phy_setup(p, slave_dev);
1199 if (ret) {
1200 free_netdev(slave_dev);
1201 return ret;
1202 }
1203
1204 ds->ports[port] = slave_dev;
1205 ret = register_netdev(slave_dev);
1206 if (ret) {
1207 netdev_err(master, "error %d registering interface %s\n",
1208 ret, slave_dev->name);
1209 phy_disconnect(p->phy);
1210 ds->ports[port] = NULL;
1211 free_netdev(slave_dev);
1212 return ret;
1213 }
1214
1215 netif_carrier_off(slave_dev);
1216
1217 return 0;
1218 }
1219
1220 static bool dsa_slave_dev_check(struct net_device *dev)
1221 {
1222 return dev->netdev_ops == &dsa_slave_netdev_ops;
1223 }
1224
1225 static int dsa_slave_master_changed(struct net_device *dev)
1226 {
1227 struct net_device *master = netdev_master_upper_dev_get(dev);
1228 struct dsa_slave_priv *p = netdev_priv(dev);
1229 int err = 0;
1230
1231 if (master && master->rtnl_link_ops &&
1232 !strcmp(master->rtnl_link_ops->kind, "bridge"))
1233 err = dsa_slave_bridge_port_join(dev, master);
1234 else if (dsa_port_is_bridged(p))
1235 err = dsa_slave_bridge_port_leave(dev);
1236
1237 return err;
1238 }
1239
1240 int dsa_slave_netdevice_event(struct notifier_block *unused,
1241 unsigned long event, void *ptr)
1242 {
1243 struct net_device *dev;
1244 int err = 0;
1245
1246 switch (event) {
1247 case NETDEV_CHANGEUPPER:
1248 dev = netdev_notifier_info_to_dev(ptr);
1249 if (!dsa_slave_dev_check(dev))
1250 goto out;
1251
1252 err = dsa_slave_master_changed(dev);
1253 if (err)
1254 netdev_warn(dev, "failed to reflect master change\n");
1255
1256 break;
1257 }
1258
1259 out:
1260 return NOTIFY_DONE;
1261 }
Linux kernel - Deliverables
This page took 0.091955 seconds and 5 git commands to generate.