?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
printf: Remove unused 'bprintf'
[drm/drm-misc.git] / net / dsa / user.c
blob06c30a9e29ff820d2dd58fb1801d5e76a5928326
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * net/dsa/user.c - user device handling
4 * Copyright (c) 2008-2009 Marvell Semiconductor
5 */
6
7 #include <linux/list.h>
8 #include <linux/etherdevice.h>
9 #include <linux/netdevice.h>
10 #include <linux/phy.h>
11 #include <linux/phy_fixed.h>
12 #include <linux/phylink.h>
13 #include <linux/of_net.h>
14 #include <linux/of_mdio.h>
15 #include <linux/mdio.h>
16 #include <net/rtnetlink.h>
17 #include <net/pkt_cls.h>
18 #include <net/selftests.h>
19 #include <net/tc_act/tc_mirred.h>
20 #include <linux/if_bridge.h>
21 #include <linux/if_hsr.h>
22 #include <net/dcbnl.h>
23 #include <linux/netpoll.h>
24 #include <linux/string.h>
25
26 #include "conduit.h"
27 #include "dsa.h"
28 #include "netlink.h"
29 #include "port.h"
30 #include "switch.h"
31 #include "tag.h"
32 #include "user.h"
33
34 struct dsa_switchdev_event_work {
35 struct net_device *dev;
36 struct net_device *orig_dev;
37 struct work_struct work;
38 unsigned long event;
39 /* Specific for SWITCHDEV_FDB_ADD_TO_DEVICE and
40 * SWITCHDEV_FDB_DEL_TO_DEVICE
41 */
42 unsigned char addr[ETH_ALEN];
43 u16 vid;
44 bool host_addr;
45 };
46
47 enum dsa_standalone_event {
48 DSA_UC_ADD,
49 DSA_UC_DEL,
50 DSA_MC_ADD,
51 DSA_MC_DEL,
52 };
53
54 struct dsa_standalone_event_work {
55 struct work_struct work;
56 struct net_device *dev;
57 enum dsa_standalone_event event;
58 unsigned char addr[ETH_ALEN];
59 u16 vid;
60 };
61
62 struct dsa_host_vlan_rx_filtering_ctx {
63 struct net_device *dev;
64 const unsigned char *addr;
65 enum dsa_standalone_event event;
66 };
67
68 static bool dsa_switch_supports_uc_filtering(struct dsa_switch *ds)
69 {
70 return ds->ops->port_fdb_add && ds->ops->port_fdb_del &&
71 ds->fdb_isolation && !ds->vlan_filtering_is_global &&
72 !ds->needs_standalone_vlan_filtering;
73 }
74
75 static bool dsa_switch_supports_mc_filtering(struct dsa_switch *ds)
76 {
77 return ds->ops->port_mdb_add && ds->ops->port_mdb_del &&
78 ds->fdb_isolation && !ds->vlan_filtering_is_global &&
79 !ds->needs_standalone_vlan_filtering;
80 }
81
82 static void dsa_user_standalone_event_work(struct work_struct *work)
83 {
84 struct dsa_standalone_event_work *standalone_work =
85 container_of(work, struct dsa_standalone_event_work, work);
86 const unsigned char *addr = standalone_work->addr;
87 struct net_device *dev = standalone_work->dev;
88 struct dsa_port *dp = dsa_user_to_port(dev);
89 struct switchdev_obj_port_mdb mdb;
90 struct dsa_switch *ds = dp->ds;
91 u16 vid = standalone_work->vid;
92 int err;
93
94 switch (standalone_work->event) {
95 case DSA_UC_ADD:
96 err = dsa_port_standalone_host_fdb_add(dp, addr, vid);
97 if (err) {
98 dev_err(ds->dev,
99 "port %d failed to add %pM vid %d to fdb: %d\n",
100 dp->index, addr, vid, err);
101 break;
102 }
103 break;
104
105 case DSA_UC_DEL:
106 err = dsa_port_standalone_host_fdb_del(dp, addr, vid);
107 if (err) {
108 dev_err(ds->dev,
109 "port %d failed to delete %pM vid %d from fdb: %d\n",
110 dp->index, addr, vid, err);
111 }
112
113 break;
114 case DSA_MC_ADD:
115 ether_addr_copy(mdb.addr, addr);
116 mdb.vid = vid;
117
118 err = dsa_port_standalone_host_mdb_add(dp, &mdb);
119 if (err) {
120 dev_err(ds->dev,
121 "port %d failed to add %pM vid %d to mdb: %d\n",
122 dp->index, addr, vid, err);
123 break;
124 }
125 break;
126 case DSA_MC_DEL:
127 ether_addr_copy(mdb.addr, addr);
128 mdb.vid = vid;
129
130 err = dsa_port_standalone_host_mdb_del(dp, &mdb);
131 if (err) {
132 dev_err(ds->dev,
133 "port %d failed to delete %pM vid %d from mdb: %d\n",
134 dp->index, addr, vid, err);
135 }
136
137 break;
138 }
139
140 kfree(standalone_work);
141 }
142
143 static int dsa_user_schedule_standalone_work(struct net_device *dev,
144 enum dsa_standalone_event event,
145 const unsigned char *addr,
146 u16 vid)
147 {
148 struct dsa_standalone_event_work *standalone_work;
149
150 standalone_work = kzalloc(sizeof(*standalone_work), GFP_ATOMIC);
151 if (!standalone_work)
152 return -ENOMEM;
153
154 INIT_WORK(&standalone_work->work, dsa_user_standalone_event_work);
155 standalone_work->event = event;
156 standalone_work->dev = dev;
157
158 ether_addr_copy(standalone_work->addr, addr);
159 standalone_work->vid = vid;
160
161 dsa_schedule_work(&standalone_work->work);
162
163 return 0;
164 }
165
166 static int dsa_user_host_vlan_rx_filtering(void *arg, int vid)
167 {
168 struct dsa_host_vlan_rx_filtering_ctx *ctx = arg;
169
170 return dsa_user_schedule_standalone_work(ctx->dev, ctx->event,
171 ctx->addr, vid);
172 }
173
174 static int dsa_user_vlan_for_each(struct net_device *dev,
175 int (*cb)(void *arg, int vid), void *arg)
176 {
177 struct dsa_port *dp = dsa_user_to_port(dev);
178 struct dsa_vlan *v;
179 int err;
180
181 lockdep_assert_held(&dev->addr_list_lock);
182
183 err = cb(arg, 0);
184 if (err)
185 return err;
186
187 list_for_each_entry(v, &dp->user_vlans, list) {
188 err = cb(arg, v->vid);
189 if (err)
190 return err;
191 }
192
193 return 0;
194 }
195
196 static int dsa_user_sync_uc(struct net_device *dev,
197 const unsigned char *addr)
198 {
199 struct net_device *conduit = dsa_user_to_conduit(dev);
200 struct dsa_port *dp = dsa_user_to_port(dev);
201 struct dsa_host_vlan_rx_filtering_ctx ctx = {
202 .dev = dev,
203 .addr = addr,
204 .event = DSA_UC_ADD,
205 };
206
207 dev_uc_add(conduit, addr);
208
209 if (!dsa_switch_supports_uc_filtering(dp->ds))
210 return 0;
211
212 return dsa_user_vlan_for_each(dev, dsa_user_host_vlan_rx_filtering,
213 &ctx);
214 }
215
216 static int dsa_user_unsync_uc(struct net_device *dev,
217 const unsigned char *addr)
218 {
219 struct net_device *conduit = dsa_user_to_conduit(dev);
220 struct dsa_port *dp = dsa_user_to_port(dev);
221 struct dsa_host_vlan_rx_filtering_ctx ctx = {
222 .dev = dev,
223 .addr = addr,
224 .event = DSA_UC_DEL,
225 };
226
227 dev_uc_del(conduit, addr);
228
229 if (!dsa_switch_supports_uc_filtering(dp->ds))
230 return 0;
231
232 return dsa_user_vlan_for_each(dev, dsa_user_host_vlan_rx_filtering,
233 &ctx);
234 }
235
236 static int dsa_user_sync_mc(struct net_device *dev,
237 const unsigned char *addr)
238 {
239 struct net_device *conduit = dsa_user_to_conduit(dev);
240 struct dsa_port *dp = dsa_user_to_port(dev);
241 struct dsa_host_vlan_rx_filtering_ctx ctx = {
242 .dev = dev,
243 .addr = addr,
244 .event = DSA_MC_ADD,
245 };
246
247 dev_mc_add(conduit, addr);
248
249 if (!dsa_switch_supports_mc_filtering(dp->ds))
250 return 0;
251
252 return dsa_user_vlan_for_each(dev, dsa_user_host_vlan_rx_filtering,
253 &ctx);
254 }
255
256 static int dsa_user_unsync_mc(struct net_device *dev,
257 const unsigned char *addr)
258 {
259 struct net_device *conduit = dsa_user_to_conduit(dev);
260 struct dsa_port *dp = dsa_user_to_port(dev);
261 struct dsa_host_vlan_rx_filtering_ctx ctx = {
262 .dev = dev,
263 .addr = addr,
264 .event = DSA_MC_DEL,
265 };
266
267 dev_mc_del(conduit, addr);
268
269 if (!dsa_switch_supports_mc_filtering(dp->ds))
270 return 0;
271
272 return dsa_user_vlan_for_each(dev, dsa_user_host_vlan_rx_filtering,
273 &ctx);
274 }
275
276 void dsa_user_sync_ha(struct net_device *dev)
277 {
278 struct dsa_port *dp = dsa_user_to_port(dev);
279 struct dsa_switch *ds = dp->ds;
280 struct netdev_hw_addr *ha;
281
282 netif_addr_lock_bh(dev);
283
284 netdev_for_each_synced_mc_addr(ha, dev)
285 dsa_user_sync_mc(dev, ha->addr);
286
287 netdev_for_each_synced_uc_addr(ha, dev)
288 dsa_user_sync_uc(dev, ha->addr);
289
290 netif_addr_unlock_bh(dev);
291
292 if (dsa_switch_supports_uc_filtering(ds) ||
293 dsa_switch_supports_mc_filtering(ds))
294 dsa_flush_workqueue();
295 }
296
297 void dsa_user_unsync_ha(struct net_device *dev)
298 {
299 struct dsa_port *dp = dsa_user_to_port(dev);
300 struct dsa_switch *ds = dp->ds;
301 struct netdev_hw_addr *ha;
302
303 netif_addr_lock_bh(dev);
304
305 netdev_for_each_synced_uc_addr(ha, dev)
306 dsa_user_unsync_uc(dev, ha->addr);
307
308 netdev_for_each_synced_mc_addr(ha, dev)
309 dsa_user_unsync_mc(dev, ha->addr);
310
311 netif_addr_unlock_bh(dev);
312
313 if (dsa_switch_supports_uc_filtering(ds) ||
314 dsa_switch_supports_mc_filtering(ds))
315 dsa_flush_workqueue();
316 }
317
318 /* user mii_bus handling ***************************************************/
319 static int dsa_user_phy_read(struct mii_bus *bus, int addr, int reg)
320 {
321 struct dsa_switch *ds = bus->priv;
322
323 if (ds->phys_mii_mask & (1 << addr))
324 return ds->ops->phy_read(ds, addr, reg);
325
326 return 0xffff;
327 }
328
329 static int dsa_user_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
330 {
331 struct dsa_switch *ds = bus->priv;
332
333 if (ds->phys_mii_mask & (1 << addr))
334 return ds->ops->phy_write(ds, addr, reg, val);
335
336 return 0;
337 }
338
339 void dsa_user_mii_bus_init(struct dsa_switch *ds)
340 {
341 ds->user_mii_bus->priv = (void *)ds;
342 ds->user_mii_bus->name = "dsa user smi";
343 ds->user_mii_bus->read = dsa_user_phy_read;
344 ds->user_mii_bus->write = dsa_user_phy_write;
345 snprintf(ds->user_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
346 ds->dst->index, ds->index);
347 ds->user_mii_bus->parent = ds->dev;
348 ds->user_mii_bus->phy_mask = ~ds->phys_mii_mask;
349 }
350
351
352 /* user device handling ****************************************************/
353 static int dsa_user_get_iflink(const struct net_device *dev)
354 {
355 return READ_ONCE(dsa_user_to_conduit(dev)->ifindex);
356 }
357
358 int dsa_user_host_uc_install(struct net_device *dev, const u8 *addr)
359 {
360 struct net_device *conduit = dsa_user_to_conduit(dev);
361 struct dsa_port *dp = dsa_user_to_port(dev);
362 struct dsa_switch *ds = dp->ds;
363 int err;
364
365 if (dsa_switch_supports_uc_filtering(ds)) {
366 err = dsa_port_standalone_host_fdb_add(dp, addr, 0);
367 if (err)
368 goto out;
369 }
370
371 if (!ether_addr_equal(addr, conduit->dev_addr)) {
372 err = dev_uc_add(conduit, addr);
373 if (err < 0)
374 goto del_host_addr;
375 }
376
377 return 0;
378
379 del_host_addr:
380 if (dsa_switch_supports_uc_filtering(ds))
381 dsa_port_standalone_host_fdb_del(dp, addr, 0);
382 out:
383 return err;
384 }
385
386 void dsa_user_host_uc_uninstall(struct net_device *dev)
387 {
388 struct net_device *conduit = dsa_user_to_conduit(dev);
389 struct dsa_port *dp = dsa_user_to_port(dev);
390 struct dsa_switch *ds = dp->ds;
391
392 if (!ether_addr_equal(dev->dev_addr, conduit->dev_addr))
393 dev_uc_del(conduit, dev->dev_addr);
394
395 if (dsa_switch_supports_uc_filtering(ds))
396 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0);
397 }
398
399 static int dsa_user_open(struct net_device *dev)
400 {
401 struct net_device *conduit = dsa_user_to_conduit(dev);
402 struct dsa_port *dp = dsa_user_to_port(dev);
403 int err;
404
405 err = dev_open(conduit, NULL);
406 if (err < 0) {
407 netdev_err(dev, "failed to open conduit %s\n", conduit->name);
408 goto out;
409 }
410
411 err = dsa_user_host_uc_install(dev, dev->dev_addr);
412 if (err)
413 goto out;
414
415 err = dsa_port_enable_rt(dp, dev->phydev);
416 if (err)
417 goto out_del_host_uc;
418
419 return 0;
420
421 out_del_host_uc:
422 dsa_user_host_uc_uninstall(dev);
423 out:
424 return err;
425 }
426
427 static int dsa_user_close(struct net_device *dev)
428 {
429 struct dsa_port *dp = dsa_user_to_port(dev);
430
431 dsa_port_disable_rt(dp);
432
433 dsa_user_host_uc_uninstall(dev);
434
435 return 0;
436 }
437
438 static void dsa_user_manage_host_flood(struct net_device *dev)
439 {
440 bool mc = dev->flags & (IFF_PROMISC | IFF_ALLMULTI);
441 struct dsa_port *dp = dsa_user_to_port(dev);
442 bool uc = dev->flags & IFF_PROMISC;
443
444 dsa_port_set_host_flood(dp, uc, mc);
445 }
446
447 static void dsa_user_change_rx_flags(struct net_device *dev, int change)
448 {
449 struct net_device *conduit = dsa_user_to_conduit(dev);
450 struct dsa_port *dp = dsa_user_to_port(dev);
451 struct dsa_switch *ds = dp->ds;
452
453 if (change & IFF_ALLMULTI)
454 dev_set_allmulti(conduit,
455 dev->flags & IFF_ALLMULTI ? 1 : -1);
456 if (change & IFF_PROMISC)
457 dev_set_promiscuity(conduit,
458 dev->flags & IFF_PROMISC ? 1 : -1);
459
460 if (dsa_switch_supports_uc_filtering(ds) &&
461 dsa_switch_supports_mc_filtering(ds))
462 dsa_user_manage_host_flood(dev);
463 }
464
465 static void dsa_user_set_rx_mode(struct net_device *dev)
466 {
467 __dev_mc_sync(dev, dsa_user_sync_mc, dsa_user_unsync_mc);
468 __dev_uc_sync(dev, dsa_user_sync_uc, dsa_user_unsync_uc);
469 }
470
471 static int dsa_user_set_mac_address(struct net_device *dev, void *a)
472 {
473 struct dsa_port *dp = dsa_user_to_port(dev);
474 struct dsa_switch *ds = dp->ds;
475 struct sockaddr *addr = a;
476 int err;
477
478 if (!is_valid_ether_addr(addr->sa_data))
479 return -EADDRNOTAVAIL;
480
481 if (ds->ops->port_set_mac_address) {
482 err = ds->ops->port_set_mac_address(ds, dp->index,
483 addr->sa_data);
484 if (err)
485 return err;
486 }
487
488 /* If the port is down, the address isn't synced yet to hardware or
489 * to the DSA conduit, so there is nothing to change.
490 */
491 if (!(dev->flags & IFF_UP))
492 goto out_change_dev_addr;
493
494 err = dsa_user_host_uc_install(dev, addr->sa_data);
495 if (err)
496 return err;
497
498 dsa_user_host_uc_uninstall(dev);
499
500 out_change_dev_addr:
501 eth_hw_addr_set(dev, addr->sa_data);
502
503 return 0;
504 }
505
506 struct dsa_user_dump_ctx {
507 struct net_device *dev;
508 struct sk_buff *skb;
509 struct netlink_callback *cb;
510 int idx;
511 };
512
513 static int
514 dsa_user_port_fdb_do_dump(const unsigned char *addr, u16 vid,
515 bool is_static, void *data)
516 {
517 struct dsa_user_dump_ctx *dump = data;
518 u32 portid = NETLINK_CB(dump->cb->skb).portid;
519 u32 seq = dump->cb->nlh->nlmsg_seq;
520 struct nlmsghdr *nlh;
521 struct ndmsg *ndm;
522
523 if (dump->idx < dump->cb->args[2])
524 goto skip;
525
526 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
527 sizeof(*ndm), NLM_F_MULTI);
528 if (!nlh)
529 return -EMSGSIZE;
530
531 ndm = nlmsg_data(nlh);
532 ndm->ndm_family = AF_BRIDGE;
533 ndm->ndm_pad1 = 0;
534 ndm->ndm_pad2 = 0;
535 ndm->ndm_flags = NTF_SELF;
536 ndm->ndm_type = 0;
537 ndm->ndm_ifindex = dump->dev->ifindex;
538 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
539
540 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
541 goto nla_put_failure;
542
543 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
544 goto nla_put_failure;
545
546 nlmsg_end(dump->skb, nlh);
547
548 skip:
549 dump->idx++;
550 return 0;
551
552 nla_put_failure:
553 nlmsg_cancel(dump->skb, nlh);
554 return -EMSGSIZE;
555 }
556
557 static int
558 dsa_user_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
559 struct net_device *dev, struct net_device *filter_dev,
560 int *idx)
561 {
562 struct dsa_port *dp = dsa_user_to_port(dev);
563 struct dsa_user_dump_ctx dump = {
564 .dev = dev,
565 .skb = skb,
566 .cb = cb,
567 .idx = *idx,
568 };
569 int err;
570
571 err = dsa_port_fdb_dump(dp, dsa_user_port_fdb_do_dump, &dump);
572 *idx = dump.idx;
573
574 return err;
575 }
576
577 static int dsa_user_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
578 {
579 struct dsa_user_priv *p = netdev_priv(dev);
580 struct dsa_switch *ds = p->dp->ds;
581 int port = p->dp->index;
582
583 /* Pass through to switch driver if it supports timestamping */
584 switch (cmd) {
585 case SIOCGHWTSTAMP:
586 if (ds->ops->port_hwtstamp_get)
587 return ds->ops->port_hwtstamp_get(ds, port, ifr);
588 break;
589 case SIOCSHWTSTAMP:
590 if (ds->ops->port_hwtstamp_set)
591 return ds->ops->port_hwtstamp_set(ds, port, ifr);
592 break;
593 }
594
595 return phylink_mii_ioctl(p->dp->pl, ifr, cmd);
596 }
597
598 static int dsa_user_port_attr_set(struct net_device *dev, const void *ctx,
599 const struct switchdev_attr *attr,
600 struct netlink_ext_ack *extack)
601 {
602 struct dsa_port *dp = dsa_user_to_port(dev);
603 int ret;
604
605 if (ctx && ctx != dp)
606 return 0;
607
608 switch (attr->id) {
609 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
610 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
611 return -EOPNOTSUPP;
612
613 ret = dsa_port_set_state(dp, attr->u.stp_state, true);
614 break;
615 case SWITCHDEV_ATTR_ID_PORT_MST_STATE:
616 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
617 return -EOPNOTSUPP;
618
619 ret = dsa_port_set_mst_state(dp, &attr->u.mst_state, extack);
620 break;
621 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
622 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
623 return -EOPNOTSUPP;
624
625 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
626 extack);
627 break;
628 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
629 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
630 return -EOPNOTSUPP;
631
632 ret = dsa_port_ageing_time(dp, attr->u.ageing_time);
633 break;
634 case SWITCHDEV_ATTR_ID_BRIDGE_MST:
635 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
636 return -EOPNOTSUPP;
637
638 ret = dsa_port_mst_enable(dp, attr->u.mst, extack);
639 break;
640 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
641 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
642 return -EOPNOTSUPP;
643
644 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags,
645 extack);
646 break;
647 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
648 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
649 return -EOPNOTSUPP;
650
651 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack);
652 break;
653 case SWITCHDEV_ATTR_ID_VLAN_MSTI:
654 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
655 return -EOPNOTSUPP;
656
657 ret = dsa_port_vlan_msti(dp, &attr->u.vlan_msti);
658 break;
659 default:
660 ret = -EOPNOTSUPP;
661 break;
662 }
663
664 return ret;
665 }
666
667 /* Must be called under rcu_read_lock() */
668 static int
669 dsa_user_vlan_check_for_8021q_uppers(struct net_device *user,
670 const struct switchdev_obj_port_vlan *vlan)
671 {
672 struct net_device *upper_dev;
673 struct list_head *iter;
674
675 netdev_for_each_upper_dev_rcu(user, upper_dev, iter) {
676 u16 vid;
677
678 if (!is_vlan_dev(upper_dev))
679 continue;
680
681 vid = vlan_dev_vlan_id(upper_dev);
682 if (vid == vlan->vid)
683 return -EBUSY;
684 }
685
686 return 0;
687 }
688
689 static int dsa_user_vlan_add(struct net_device *dev,
690 const struct switchdev_obj *obj,
691 struct netlink_ext_ack *extack)
692 {
693 struct dsa_port *dp = dsa_user_to_port(dev);
694 struct switchdev_obj_port_vlan *vlan;
695 int err;
696
697 if (dsa_port_skip_vlan_configuration(dp)) {
698 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN");
699 return 0;
700 }
701
702 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
703
704 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with
705 * the same VID.
706 */
707 if (br_vlan_enabled(dsa_port_bridge_dev_get(dp))) {
708 rcu_read_lock();
709 err = dsa_user_vlan_check_for_8021q_uppers(dev, vlan);
710 rcu_read_unlock();
711 if (err) {
712 NL_SET_ERR_MSG_MOD(extack,
713 "Port already has a VLAN upper with this VID");
714 return err;
715 }
716 }
717
718 return dsa_port_vlan_add(dp, vlan, extack);
719 }
720
721 /* Offload a VLAN installed on the bridge or on a foreign interface by
722 * installing it as a VLAN towards the CPU port.
723 */
724 static int dsa_user_host_vlan_add(struct net_device *dev,
725 const struct switchdev_obj *obj,
726 struct netlink_ext_ack *extack)
727 {
728 struct dsa_port *dp = dsa_user_to_port(dev);
729 struct switchdev_obj_port_vlan vlan;
730
731 /* Do nothing if this is a software bridge */
732 if (!dp->bridge)
733 return -EOPNOTSUPP;
734
735 if (dsa_port_skip_vlan_configuration(dp)) {
736 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN");
737 return 0;
738 }
739
740 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj);
741
742 /* Even though drivers often handle CPU membership in special ways,
743 * it doesn't make sense to program a PVID, so clear this flag.
744 */
745 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID;
746
747 return dsa_port_host_vlan_add(dp, &vlan, extack);
748 }
749
750 static int dsa_user_port_obj_add(struct net_device *dev, const void *ctx,
751 const struct switchdev_obj *obj,
752 struct netlink_ext_ack *extack)
753 {
754 struct dsa_port *dp = dsa_user_to_port(dev);
755 int err;
756
757 if (ctx && ctx != dp)
758 return 0;
759
760 switch (obj->id) {
761 case SWITCHDEV_OBJ_ID_PORT_MDB:
762 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
763 return -EOPNOTSUPP;
764
765 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
766 break;
767 case SWITCHDEV_OBJ_ID_HOST_MDB:
768 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
769 return -EOPNOTSUPP;
770
771 err = dsa_port_bridge_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
772 break;
773 case SWITCHDEV_OBJ_ID_PORT_VLAN:
774 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev))
775 err = dsa_user_vlan_add(dev, obj, extack);
776 else
777 err = dsa_user_host_vlan_add(dev, obj, extack);
778 break;
779 case SWITCHDEV_OBJ_ID_MRP:
780 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
781 return -EOPNOTSUPP;
782
783 err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj));
784 break;
785 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
786 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
787 return -EOPNOTSUPP;
788
789 err = dsa_port_mrp_add_ring_role(dp,
790 SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
791 break;
792 default:
793 err = -EOPNOTSUPP;
794 break;
795 }
796
797 return err;
798 }
799
800 static int dsa_user_vlan_del(struct net_device *dev,
801 const struct switchdev_obj *obj)
802 {
803 struct dsa_port *dp = dsa_user_to_port(dev);
804 struct switchdev_obj_port_vlan *vlan;
805
806 if (dsa_port_skip_vlan_configuration(dp))
807 return 0;
808
809 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
810
811 return dsa_port_vlan_del(dp, vlan);
812 }
813
814 static int dsa_user_host_vlan_del(struct net_device *dev,
815 const struct switchdev_obj *obj)
816 {
817 struct dsa_port *dp = dsa_user_to_port(dev);
818 struct switchdev_obj_port_vlan *vlan;
819
820 /* Do nothing if this is a software bridge */
821 if (!dp->bridge)
822 return -EOPNOTSUPP;
823
824 if (dsa_port_skip_vlan_configuration(dp))
825 return 0;
826
827 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
828
829 return dsa_port_host_vlan_del(dp, vlan);
830 }
831
832 static int dsa_user_port_obj_del(struct net_device *dev, const void *ctx,
833 const struct switchdev_obj *obj)
834 {
835 struct dsa_port *dp = dsa_user_to_port(dev);
836 int err;
837
838 if (ctx && ctx != dp)
839 return 0;
840
841 switch (obj->id) {
842 case SWITCHDEV_OBJ_ID_PORT_MDB:
843 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
844 return -EOPNOTSUPP;
845
846 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
847 break;
848 case SWITCHDEV_OBJ_ID_HOST_MDB:
849 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
850 return -EOPNOTSUPP;
851
852 err = dsa_port_bridge_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
853 break;
854 case SWITCHDEV_OBJ_ID_PORT_VLAN:
855 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev))
856 err = dsa_user_vlan_del(dev, obj);
857 else
858 err = dsa_user_host_vlan_del(dev, obj);
859 break;
860 case SWITCHDEV_OBJ_ID_MRP:
861 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
862 return -EOPNOTSUPP;
863
864 err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj));
865 break;
866 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
867 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
868 return -EOPNOTSUPP;
869
870 err = dsa_port_mrp_del_ring_role(dp,
871 SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
872 break;
873 default:
874 err = -EOPNOTSUPP;
875 break;
876 }
877
878 return err;
879 }
880
881 static netdev_tx_t dsa_user_netpoll_send_skb(struct net_device *dev,
882 struct sk_buff *skb)
883 {
884 #ifdef CONFIG_NET_POLL_CONTROLLER
885 struct dsa_user_priv *p = netdev_priv(dev);
886
887 return netpoll_send_skb(p->netpoll, skb);
888 #else
889 BUG();
890 return NETDEV_TX_OK;
891 #endif
892 }
893
894 static void dsa_skb_tx_timestamp(struct dsa_user_priv *p,
895 struct sk_buff *skb)
896 {
897 struct dsa_switch *ds = p->dp->ds;
898
899 if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))
900 return;
901
902 if (!ds->ops->port_txtstamp)
903 return;
904
905 ds->ops->port_txtstamp(ds, p->dp->index, skb);
906 }
907
908 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
909 {
910 /* SKB for netpoll still need to be mangled with the protocol-specific
911 * tag to be successfully transmitted
912 */
913 if (unlikely(netpoll_tx_running(dev)))
914 return dsa_user_netpoll_send_skb(dev, skb);
915
916 /* Queue the SKB for transmission on the parent interface, but
917 * do not modify its EtherType
918 */
919 skb->dev = dsa_user_to_conduit(dev);
920 dev_queue_xmit(skb);
921
922 return NETDEV_TX_OK;
923 }
924 EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
925
926 static netdev_tx_t dsa_user_xmit(struct sk_buff *skb, struct net_device *dev)
927 {
928 struct dsa_user_priv *p = netdev_priv(dev);
929 struct sk_buff *nskb;
930
931 dev_sw_netstats_tx_add(dev, 1, skb->len);
932
933 memset(skb->cb, 0, sizeof(skb->cb));
934
935 /* Handle tx timestamp if any */
936 dsa_skb_tx_timestamp(p, skb);
937
938 if (skb_ensure_writable_head_tail(skb, dev)) {
939 dev_kfree_skb_any(skb);
940 return NETDEV_TX_OK;
941 }
942
943 /* needed_tailroom should still be 'warm' in the cache line from
944 * skb_ensure_writable_head_tail(), which has also ensured that
945 * padding is safe.
946 */
947 if (dev->needed_tailroom)
948 eth_skb_pad(skb);
949
950 /* Transmit function may have to reallocate the original SKB,
951 * in which case it must have freed it. Only free it here on error.
952 */
953 nskb = p->xmit(skb, dev);
954 if (!nskb) {
955 kfree_skb(skb);
956 return NETDEV_TX_OK;
957 }
958
959 return dsa_enqueue_skb(nskb, dev);
960 }
961
962 /* ethtool operations *******************************************************/
963
964 static void dsa_user_get_drvinfo(struct net_device *dev,
965 struct ethtool_drvinfo *drvinfo)
966 {
967 strscpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
968 strscpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
969 strscpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
970 }
971
972 static int dsa_user_get_regs_len(struct net_device *dev)
973 {
974 struct dsa_port *dp = dsa_user_to_port(dev);
975 struct dsa_switch *ds = dp->ds;
976
977 if (ds->ops->get_regs_len)
978 return ds->ops->get_regs_len(ds, dp->index);
979
980 return -EOPNOTSUPP;
981 }
982
983 static void
984 dsa_user_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
985 {
986 struct dsa_port *dp = dsa_user_to_port(dev);
987 struct dsa_switch *ds = dp->ds;
988
989 if (ds->ops->get_regs)
990 ds->ops->get_regs(ds, dp->index, regs, _p);
991 }
992
993 static int dsa_user_nway_reset(struct net_device *dev)
994 {
995 struct dsa_port *dp = dsa_user_to_port(dev);
996
997 return phylink_ethtool_nway_reset(dp->pl);
998 }
999
1000 static int dsa_user_get_eeprom_len(struct net_device *dev)
1001 {
1002 struct dsa_port *dp = dsa_user_to_port(dev);
1003 struct dsa_switch *ds = dp->ds;
1004
1005 if (ds->cd && ds->cd->eeprom_len)
1006 return ds->cd->eeprom_len;
1007
1008 if (ds->ops->get_eeprom_len)
1009 return ds->ops->get_eeprom_len(ds);
1010
1011 return 0;
1012 }
1013
1014 static int dsa_user_get_eeprom(struct net_device *dev,
1015 struct ethtool_eeprom *eeprom, u8 *data)
1016 {
1017 struct dsa_port *dp = dsa_user_to_port(dev);
1018 struct dsa_switch *ds = dp->ds;
1019
1020 if (ds->ops->get_eeprom)
1021 return ds->ops->get_eeprom(ds, eeprom, data);
1022
1023 return -EOPNOTSUPP;
1024 }
1025
1026 static int dsa_user_set_eeprom(struct net_device *dev,
1027 struct ethtool_eeprom *eeprom, u8 *data)
1028 {
1029 struct dsa_port *dp = dsa_user_to_port(dev);
1030 struct dsa_switch *ds = dp->ds;
1031
1032 if (ds->ops->set_eeprom)
1033 return ds->ops->set_eeprom(ds, eeprom, data);
1034
1035 return -EOPNOTSUPP;
1036 }
1037
1038 static void dsa_user_get_strings(struct net_device *dev,
1039 uint32_t stringset, uint8_t *data)
1040 {
1041 struct dsa_port *dp = dsa_user_to_port(dev);
1042 struct dsa_switch *ds = dp->ds;
1043
1044 if (stringset == ETH_SS_STATS) {
1045 ethtool_puts(&data, "tx_packets");
1046 ethtool_puts(&data, "tx_bytes");
1047 ethtool_puts(&data, "rx_packets");
1048 ethtool_puts(&data, "rx_bytes");
1049 if (ds->ops->get_strings)
1050 ds->ops->get_strings(ds, dp->index, stringset, data);
1051 } else if (stringset == ETH_SS_TEST) {
1052 net_selftest_get_strings(data);
1053 }
1054
1055 }
1056
1057 static void dsa_user_get_ethtool_stats(struct net_device *dev,
1058 struct ethtool_stats *stats,
1059 uint64_t *data)
1060 {
1061 struct dsa_port *dp = dsa_user_to_port(dev);
1062 struct dsa_switch *ds = dp->ds;
1063 struct pcpu_sw_netstats *s;
1064 unsigned int start;
1065 int i;
1066
1067 for_each_possible_cpu(i) {
1068 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
1069
1070 s = per_cpu_ptr(dev->tstats, i);
1071 do {
1072 start = u64_stats_fetch_begin(&s->syncp);
1073 tx_packets = u64_stats_read(&s->tx_packets);
1074 tx_bytes = u64_stats_read(&s->tx_bytes);
1075 rx_packets = u64_stats_read(&s->rx_packets);
1076 rx_bytes = u64_stats_read(&s->rx_bytes);
1077 } while (u64_stats_fetch_retry(&s->syncp, start));
1078 data[0] += tx_packets;
1079 data[1] += tx_bytes;
1080 data[2] += rx_packets;
1081 data[3] += rx_bytes;
1082 }
1083 if (ds->ops->get_ethtool_stats)
1084 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
1085 }
1086
1087 static int dsa_user_get_sset_count(struct net_device *dev, int sset)
1088 {
1089 struct dsa_port *dp = dsa_user_to_port(dev);
1090 struct dsa_switch *ds = dp->ds;
1091
1092 if (sset == ETH_SS_STATS) {
1093 int count = 0;
1094
1095 if (ds->ops->get_sset_count) {
1096 count = ds->ops->get_sset_count(ds, dp->index, sset);
1097 if (count < 0)
1098 return count;
1099 }
1100
1101 return count + 4;
1102 } else if (sset == ETH_SS_TEST) {
1103 return net_selftest_get_count();
1104 }
1105
1106 return -EOPNOTSUPP;
1107 }
1108
1109 static void dsa_user_get_eth_phy_stats(struct net_device *dev,
1110 struct ethtool_eth_phy_stats *phy_stats)
1111 {
1112 struct dsa_port *dp = dsa_user_to_port(dev);
1113 struct dsa_switch *ds = dp->ds;
1114
1115 if (ds->ops->get_eth_phy_stats)
1116 ds->ops->get_eth_phy_stats(ds, dp->index, phy_stats);
1117 }
1118
1119 static void dsa_user_get_eth_mac_stats(struct net_device *dev,
1120 struct ethtool_eth_mac_stats *mac_stats)
1121 {
1122 struct dsa_port *dp = dsa_user_to_port(dev);
1123 struct dsa_switch *ds = dp->ds;
1124
1125 if (ds->ops->get_eth_mac_stats)
1126 ds->ops->get_eth_mac_stats(ds, dp->index, mac_stats);
1127 }
1128
1129 static void
1130 dsa_user_get_eth_ctrl_stats(struct net_device *dev,
1131 struct ethtool_eth_ctrl_stats *ctrl_stats)
1132 {
1133 struct dsa_port *dp = dsa_user_to_port(dev);
1134 struct dsa_switch *ds = dp->ds;
1135
1136 if (ds->ops->get_eth_ctrl_stats)
1137 ds->ops->get_eth_ctrl_stats(ds, dp->index, ctrl_stats);
1138 }
1139
1140 static void
1141 dsa_user_get_rmon_stats(struct net_device *dev,
1142 struct ethtool_rmon_stats *rmon_stats,
1143 const struct ethtool_rmon_hist_range **ranges)
1144 {
1145 struct dsa_port *dp = dsa_user_to_port(dev);
1146 struct dsa_switch *ds = dp->ds;
1147
1148 if (ds->ops->get_rmon_stats)
1149 ds->ops->get_rmon_stats(ds, dp->index, rmon_stats, ranges);
1150 }
1151
1152 static void dsa_user_net_selftest(struct net_device *ndev,
1153 struct ethtool_test *etest, u64 *buf)
1154 {
1155 struct dsa_port *dp = dsa_user_to_port(ndev);
1156 struct dsa_switch *ds = dp->ds;
1157
1158 if (ds->ops->self_test) {
1159 ds->ops->self_test(ds, dp->index, etest, buf);
1160 return;
1161 }
1162
1163 net_selftest(ndev, etest, buf);
1164 }
1165
1166 static int dsa_user_get_mm(struct net_device *dev,
1167 struct ethtool_mm_state *state)
1168 {
1169 struct dsa_port *dp = dsa_user_to_port(dev);
1170 struct dsa_switch *ds = dp->ds;
1171
1172 if (!ds->ops->get_mm)
1173 return -EOPNOTSUPP;
1174
1175 return ds->ops->get_mm(ds, dp->index, state);
1176 }
1177
1178 static int dsa_user_set_mm(struct net_device *dev, struct ethtool_mm_cfg *cfg,
1179 struct netlink_ext_ack *extack)
1180 {
1181 struct dsa_port *dp = dsa_user_to_port(dev);
1182 struct dsa_switch *ds = dp->ds;
1183
1184 if (!ds->ops->set_mm)
1185 return -EOPNOTSUPP;
1186
1187 return ds->ops->set_mm(ds, dp->index, cfg, extack);
1188 }
1189
1190 static void dsa_user_get_mm_stats(struct net_device *dev,
1191 struct ethtool_mm_stats *stats)
1192 {
1193 struct dsa_port *dp = dsa_user_to_port(dev);
1194 struct dsa_switch *ds = dp->ds;
1195
1196 if (ds->ops->get_mm_stats)
1197 ds->ops->get_mm_stats(ds, dp->index, stats);
1198 }
1199
1200 static void dsa_user_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
1201 {
1202 struct dsa_port *dp = dsa_user_to_port(dev);
1203 struct dsa_switch *ds = dp->ds;
1204
1205 phylink_ethtool_get_wol(dp->pl, w);
1206
1207 if (ds->ops->get_wol)
1208 ds->ops->get_wol(ds, dp->index, w);
1209 }
1210
1211 static int dsa_user_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
1212 {
1213 struct dsa_port *dp = dsa_user_to_port(dev);
1214 struct dsa_switch *ds = dp->ds;
1215 int ret = -EOPNOTSUPP;
1216
1217 phylink_ethtool_set_wol(dp->pl, w);
1218
1219 if (ds->ops->set_wol)
1220 ret = ds->ops->set_wol(ds, dp->index, w);
1221
1222 return ret;
1223 }
1224
1225 static int dsa_user_set_eee(struct net_device *dev, struct ethtool_keee *e)
1226 {
1227 struct dsa_port *dp = dsa_user_to_port(dev);
1228 struct dsa_switch *ds = dp->ds;
1229 int ret;
1230
1231 /* Port's PHY and MAC both need to be EEE capable */
1232 if (!dev->phydev || !dp->pl)
1233 return -ENODEV;
1234
1235 if (!ds->ops->set_mac_eee)
1236 return -EOPNOTSUPP;
1237
1238 ret = ds->ops->set_mac_eee(ds, dp->index, e);
1239 if (ret)
1240 return ret;
1241
1242 return phylink_ethtool_set_eee(dp->pl, e);
1243 }
1244
1245 static int dsa_user_get_eee(struct net_device *dev, struct ethtool_keee *e)
1246 {
1247 struct dsa_port *dp = dsa_user_to_port(dev);
1248 struct dsa_switch *ds = dp->ds;
1249 int ret;
1250
1251 /* Port's PHY and MAC both need to be EEE capable */
1252 if (!dev->phydev || !dp->pl)
1253 return -ENODEV;
1254
1255 if (!ds->ops->get_mac_eee)
1256 return -EOPNOTSUPP;
1257
1258 ret = ds->ops->get_mac_eee(ds, dp->index, e);
1259 if (ret)
1260 return ret;
1261
1262 return phylink_ethtool_get_eee(dp->pl, e);
1263 }
1264
1265 static int dsa_user_get_link_ksettings(struct net_device *dev,
1266 struct ethtool_link_ksettings *cmd)
1267 {
1268 struct dsa_port *dp = dsa_user_to_port(dev);
1269
1270 return phylink_ethtool_ksettings_get(dp->pl, cmd);
1271 }
1272
1273 static int dsa_user_set_link_ksettings(struct net_device *dev,
1274 const struct ethtool_link_ksettings *cmd)
1275 {
1276 struct dsa_port *dp = dsa_user_to_port(dev);
1277
1278 return phylink_ethtool_ksettings_set(dp->pl, cmd);
1279 }
1280
1281 static void dsa_user_get_pause_stats(struct net_device *dev,
1282 struct ethtool_pause_stats *pause_stats)
1283 {
1284 struct dsa_port *dp = dsa_user_to_port(dev);
1285 struct dsa_switch *ds = dp->ds;
1286
1287 if (ds->ops->get_pause_stats)
1288 ds->ops->get_pause_stats(ds, dp->index, pause_stats);
1289 }
1290
1291 static void dsa_user_get_pauseparam(struct net_device *dev,
1292 struct ethtool_pauseparam *pause)
1293 {
1294 struct dsa_port *dp = dsa_user_to_port(dev);
1295
1296 phylink_ethtool_get_pauseparam(dp->pl, pause);
1297 }
1298
1299 static int dsa_user_set_pauseparam(struct net_device *dev,
1300 struct ethtool_pauseparam *pause)
1301 {
1302 struct dsa_port *dp = dsa_user_to_port(dev);
1303
1304 return phylink_ethtool_set_pauseparam(dp->pl, pause);
1305 }
1306
1307 #ifdef CONFIG_NET_POLL_CONTROLLER
1308 static int dsa_user_netpoll_setup(struct net_device *dev)
1309 {
1310 struct net_device *conduit = dsa_user_to_conduit(dev);
1311 struct dsa_user_priv *p = netdev_priv(dev);
1312 struct netpoll *netpoll;
1313 int err = 0;
1314
1315 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
1316 if (!netpoll)
1317 return -ENOMEM;
1318
1319 err = __netpoll_setup(netpoll, conduit);
1320 if (err) {
1321 kfree(netpoll);
1322 goto out;
1323 }
1324
1325 p->netpoll = netpoll;
1326 out:
1327 return err;
1328 }
1329
1330 static void dsa_user_netpoll_cleanup(struct net_device *dev)
1331 {
1332 struct dsa_user_priv *p = netdev_priv(dev);
1333 struct netpoll *netpoll = p->netpoll;
1334
1335 if (!netpoll)
1336 return;
1337
1338 p->netpoll = NULL;
1339
1340 __netpoll_free(netpoll);
1341 }
1342
1343 static void dsa_user_poll_controller(struct net_device *dev)
1344 {
1345 }
1346 #endif
1347
1348 static struct dsa_mall_tc_entry *
1349 dsa_user_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
1350 {
1351 struct dsa_user_priv *p = netdev_priv(dev);
1352 struct dsa_mall_tc_entry *mall_tc_entry;
1353
1354 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
1355 if (mall_tc_entry->cookie == cookie)
1356 return mall_tc_entry;
1357
1358 return NULL;
1359 }
1360
1361 static int
1362 dsa_user_add_cls_matchall_mirred(struct net_device *dev,
1363 struct tc_cls_matchall_offload *cls,
1364 bool ingress, bool ingress_target)
1365 {
1366 struct netlink_ext_ack *extack = cls->common.extack;
1367 struct dsa_port *dp = dsa_user_to_port(dev);
1368 struct dsa_user_priv *p = netdev_priv(dev);
1369 struct dsa_mall_mirror_tc_entry *mirror;
1370 struct dsa_mall_tc_entry *mall_tc_entry;
1371 struct dsa_switch *ds = dp->ds;
1372 struct flow_action_entry *act;
1373 struct dsa_port *to_dp;
1374 int err;
1375
1376 if (cls->common.protocol != htons(ETH_P_ALL)) {
1377 NL_SET_ERR_MSG_MOD(extack,
1378 "Can only offload \"protocol all\" matchall filter");
1379 return -EOPNOTSUPP;
1380 }
1381
1382 if (!ds->ops->port_mirror_add) {
1383 NL_SET_ERR_MSG_MOD(extack,
1384 "Switch does not support mirroring operation");
1385 return -EOPNOTSUPP;
1386 }
1387
1388 if (!flow_action_basic_hw_stats_check(&cls->rule->action, extack))
1389 return -EOPNOTSUPP;
1390
1391 act = &cls->rule->action.entries[0];
1392
1393 if (!act->dev)
1394 return -EINVAL;
1395
1396 if (dsa_user_dev_check(act->dev)) {
1397 if (ingress_target) {
1398 /* We can only fulfill this using software assist */
1399 if (cls->common.skip_sw) {
1400 NL_SET_ERR_MSG_MOD(extack,
1401 "Can only mirred to ingress of DSA user port if filter also runs in software");
1402 return -EOPNOTSUPP;
1403 }
1404 to_dp = dp->cpu_dp;
1405 } else {
1406 to_dp = dsa_user_to_port(act->dev);
1407 }
1408 } else {
1409 /* Handle mirroring to foreign target ports as a mirror towards
1410 * the CPU. The software tc rule will take the packets from
1411 * there.
1412 */
1413 if (cls->common.skip_sw) {
1414 NL_SET_ERR_MSG_MOD(extack,
1415 "Can only mirred to CPU if filter also runs in software");
1416 return -EOPNOTSUPP;
1417 }
1418 to_dp = dp->cpu_dp;
1419 }
1420
1421 if (dp->ds != to_dp->ds) {
1422 NL_SET_ERR_MSG_MOD(extack,
1423 "Cross-chip mirroring not implemented");
1424 return -EOPNOTSUPP;
1425 }
1426
1427 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1428 if (!mall_tc_entry)
1429 return -ENOMEM;
1430
1431 mall_tc_entry->cookie = cls->cookie;
1432 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
1433 mirror = &mall_tc_entry->mirror;
1434 mirror->to_local_port = to_dp->index;
1435 mirror->ingress = ingress;
1436
1437 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress, extack);
1438 if (err) {
1439 kfree(mall_tc_entry);
1440 return err;
1441 }
1442
1443 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
1444
1445 return err;
1446 }
1447
1448 static int
1449 dsa_user_add_cls_matchall_police(struct net_device *dev,
1450 struct tc_cls_matchall_offload *cls,
1451 bool ingress)
1452 {
1453 struct netlink_ext_ack *extack = cls->common.extack;
1454 struct dsa_port *dp = dsa_user_to_port(dev);
1455 struct dsa_user_priv *p = netdev_priv(dev);
1456 struct dsa_mall_policer_tc_entry *policer;
1457 struct dsa_mall_tc_entry *mall_tc_entry;
1458 struct dsa_switch *ds = dp->ds;
1459 struct flow_action_entry *act;
1460 int err;
1461
1462 if (!ds->ops->port_policer_add) {
1463 NL_SET_ERR_MSG_MOD(extack,
1464 "Policing offload not implemented");
1465 return -EOPNOTSUPP;
1466 }
1467
1468 if (!ingress) {
1469 NL_SET_ERR_MSG_MOD(extack,
1470 "Only supported on ingress qdisc");
1471 return -EOPNOTSUPP;
1472 }
1473
1474 if (!flow_action_basic_hw_stats_check(&cls->rule->action, extack))
1475 return -EOPNOTSUPP;
1476
1477 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) {
1478 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) {
1479 NL_SET_ERR_MSG_MOD(extack,
1480 "Only one port policer allowed");
1481 return -EEXIST;
1482 }
1483 }
1484
1485 act = &cls->rule->action.entries[0];
1486
1487 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1488 if (!mall_tc_entry)
1489 return -ENOMEM;
1490
1491 mall_tc_entry->cookie = cls->cookie;
1492 mall_tc_entry->type = DSA_PORT_MALL_POLICER;
1493 policer = &mall_tc_entry->policer;
1494 policer->rate_bytes_per_sec = act->police.rate_bytes_ps;
1495 policer->burst = act->police.burst;
1496
1497 err = ds->ops->port_policer_add(ds, dp->index, policer);
1498 if (err) {
1499 kfree(mall_tc_entry);
1500 return err;
1501 }
1502
1503 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
1504
1505 return err;
1506 }
1507
1508 static int dsa_user_add_cls_matchall(struct net_device *dev,
1509 struct tc_cls_matchall_offload *cls,
1510 bool ingress)
1511 {
1512 const struct flow_action *action = &cls->rule->action;
1513 struct netlink_ext_ack *extack = cls->common.extack;
1514
1515 if (!flow_offload_has_one_action(action)) {
1516 NL_SET_ERR_MSG_MOD(extack,
1517 "Cannot offload matchall filter with more than one action");
1518 return -EOPNOTSUPP;
1519 }
1520
1521 switch (action->entries[0].id) {
1522 case FLOW_ACTION_MIRRED:
1523 return dsa_user_add_cls_matchall_mirred(dev, cls, ingress,
1524 false);
1525 case FLOW_ACTION_MIRRED_INGRESS:
1526 return dsa_user_add_cls_matchall_mirred(dev, cls, ingress,
1527 true);
1528 case FLOW_ACTION_POLICE:
1529 return dsa_user_add_cls_matchall_police(dev, cls, ingress);
1530 default:
1531 NL_SET_ERR_MSG_MOD(extack, "Unknown action");
1532 break;
1533 }
1534
1535 return -EOPNOTSUPP;
1536 }
1537
1538 static void dsa_user_del_cls_matchall(struct net_device *dev,
1539 struct tc_cls_matchall_offload *cls)
1540 {
1541 struct dsa_port *dp = dsa_user_to_port(dev);
1542 struct dsa_mall_tc_entry *mall_tc_entry;
1543 struct dsa_switch *ds = dp->ds;
1544
1545 mall_tc_entry = dsa_user_mall_tc_entry_find(dev, cls->cookie);
1546 if (!mall_tc_entry)
1547 return;
1548
1549 list_del(&mall_tc_entry->list);
1550
1551 switch (mall_tc_entry->type) {
1552 case DSA_PORT_MALL_MIRROR:
1553 if (ds->ops->port_mirror_del)
1554 ds->ops->port_mirror_del(ds, dp->index,
1555 &mall_tc_entry->mirror);
1556 break;
1557 case DSA_PORT_MALL_POLICER:
1558 if (ds->ops->port_policer_del)
1559 ds->ops->port_policer_del(ds, dp->index);
1560 break;
1561 default:
1562 WARN_ON(1);
1563 }
1564
1565 kfree(mall_tc_entry);
1566 }
1567
1568 static int dsa_user_setup_tc_cls_matchall(struct net_device *dev,
1569 struct tc_cls_matchall_offload *cls,
1570 bool ingress)
1571 {
1572 if (cls->common.chain_index)
1573 return -EOPNOTSUPP;
1574
1575 switch (cls->command) {
1576 case TC_CLSMATCHALL_REPLACE:
1577 return dsa_user_add_cls_matchall(dev, cls, ingress);
1578 case TC_CLSMATCHALL_DESTROY:
1579 dsa_user_del_cls_matchall(dev, cls);
1580 return 0;
1581 default:
1582 return -EOPNOTSUPP;
1583 }
1584 }
1585
1586 static int dsa_user_add_cls_flower(struct net_device *dev,
1587 struct flow_cls_offload *cls,
1588 bool ingress)
1589 {
1590 struct dsa_port *dp = dsa_user_to_port(dev);
1591 struct dsa_switch *ds = dp->ds;
1592 int port = dp->index;
1593
1594 if (!ds->ops->cls_flower_add)
1595 return -EOPNOTSUPP;
1596
1597 return ds->ops->cls_flower_add(ds, port, cls, ingress);
1598 }
1599
1600 static int dsa_user_del_cls_flower(struct net_device *dev,
1601 struct flow_cls_offload *cls,
1602 bool ingress)
1603 {
1604 struct dsa_port *dp = dsa_user_to_port(dev);
1605 struct dsa_switch *ds = dp->ds;
1606 int port = dp->index;
1607
1608 if (!ds->ops->cls_flower_del)
1609 return -EOPNOTSUPP;
1610
1611 return ds->ops->cls_flower_del(ds, port, cls, ingress);
1612 }
1613
1614 static int dsa_user_stats_cls_flower(struct net_device *dev,
1615 struct flow_cls_offload *cls,
1616 bool ingress)
1617 {
1618 struct dsa_port *dp = dsa_user_to_port(dev);
1619 struct dsa_switch *ds = dp->ds;
1620 int port = dp->index;
1621
1622 if (!ds->ops->cls_flower_stats)
1623 return -EOPNOTSUPP;
1624
1625 return ds->ops->cls_flower_stats(ds, port, cls, ingress);
1626 }
1627
1628 static int dsa_user_setup_tc_cls_flower(struct net_device *dev,
1629 struct flow_cls_offload *cls,
1630 bool ingress)
1631 {
1632 switch (cls->command) {
1633 case FLOW_CLS_REPLACE:
1634 return dsa_user_add_cls_flower(dev, cls, ingress);
1635 case FLOW_CLS_DESTROY:
1636 return dsa_user_del_cls_flower(dev, cls, ingress);
1637 case FLOW_CLS_STATS:
1638 return dsa_user_stats_cls_flower(dev, cls, ingress);
1639 default:
1640 return -EOPNOTSUPP;
1641 }
1642 }
1643
1644 static int dsa_user_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
1645 void *cb_priv, bool ingress)
1646 {
1647 struct net_device *dev = cb_priv;
1648
1649 if (!tc_can_offload(dev))
1650 return -EOPNOTSUPP;
1651
1652 switch (type) {
1653 case TC_SETUP_CLSMATCHALL:
1654 return dsa_user_setup_tc_cls_matchall(dev, type_data, ingress);
1655 case TC_SETUP_CLSFLOWER:
1656 return dsa_user_setup_tc_cls_flower(dev, type_data, ingress);
1657 default:
1658 return -EOPNOTSUPP;
1659 }
1660 }
1661
1662 static int dsa_user_setup_tc_block_cb_ig(enum tc_setup_type type,
1663 void *type_data, void *cb_priv)
1664 {
1665 return dsa_user_setup_tc_block_cb(type, type_data, cb_priv, true);
1666 }
1667
1668 static int dsa_user_setup_tc_block_cb_eg(enum tc_setup_type type,
1669 void *type_data, void *cb_priv)
1670 {
1671 return dsa_user_setup_tc_block_cb(type, type_data, cb_priv, false);
1672 }
1673
1674 static LIST_HEAD(dsa_user_block_cb_list);
1675
1676 static int dsa_user_setup_tc_block(struct net_device *dev,
1677 struct flow_block_offload *f)
1678 {
1679 struct flow_block_cb *block_cb;
1680 flow_setup_cb_t *cb;
1681
1682 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
1683 cb = dsa_user_setup_tc_block_cb_ig;
1684 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
1685 cb = dsa_user_setup_tc_block_cb_eg;
1686 else
1687 return -EOPNOTSUPP;
1688
1689 f->driver_block_list = &dsa_user_block_cb_list;
1690
1691 switch (f->command) {
1692 case FLOW_BLOCK_BIND:
1693 if (flow_block_cb_is_busy(cb, dev, &dsa_user_block_cb_list))
1694 return -EBUSY;
1695
1696 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL);
1697 if (IS_ERR(block_cb))
1698 return PTR_ERR(block_cb);
1699
1700 flow_block_cb_add(block_cb, f);
1701 list_add_tail(&block_cb->driver_list, &dsa_user_block_cb_list);
1702 return 0;
1703 case FLOW_BLOCK_UNBIND:
1704 block_cb = flow_block_cb_lookup(f->block, cb, dev);
1705 if (!block_cb)
1706 return -ENOENT;
1707
1708 flow_block_cb_remove(block_cb, f);
1709 list_del(&block_cb->driver_list);
1710 return 0;
1711 default:
1712 return -EOPNOTSUPP;
1713 }
1714 }
1715
1716 static int dsa_user_setup_ft_block(struct dsa_switch *ds, int port,
1717 void *type_data)
1718 {
1719 struct net_device *conduit = dsa_port_to_conduit(dsa_to_port(ds, port));
1720
1721 if (!conduit->netdev_ops->ndo_setup_tc)
1722 return -EOPNOTSUPP;
1723
1724 return conduit->netdev_ops->ndo_setup_tc(conduit, TC_SETUP_FT, type_data);
1725 }
1726
1727 static int dsa_user_setup_tc(struct net_device *dev, enum tc_setup_type type,
1728 void *type_data)
1729 {
1730 struct dsa_port *dp = dsa_user_to_port(dev);
1731 struct dsa_switch *ds = dp->ds;
1732
1733 switch (type) {
1734 case TC_SETUP_BLOCK:
1735 return dsa_user_setup_tc_block(dev, type_data);
1736 case TC_SETUP_FT:
1737 return dsa_user_setup_ft_block(ds, dp->index, type_data);
1738 default:
1739 break;
1740 }
1741
1742 if (!ds->ops->port_setup_tc)
1743 return -EOPNOTSUPP;
1744
1745 return ds->ops->port_setup_tc(ds, dp->index, type, type_data);
1746 }
1747
1748 static int dsa_user_get_rxnfc(struct net_device *dev,
1749 struct ethtool_rxnfc *nfc, u32 *rule_locs)
1750 {
1751 struct dsa_port *dp = dsa_user_to_port(dev);
1752 struct dsa_switch *ds = dp->ds;
1753
1754 if (!ds->ops->get_rxnfc)
1755 return -EOPNOTSUPP;
1756
1757 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
1758 }
1759
1760 static int dsa_user_set_rxnfc(struct net_device *dev,
1761 struct ethtool_rxnfc *nfc)
1762 {
1763 struct dsa_port *dp = dsa_user_to_port(dev);
1764 struct dsa_switch *ds = dp->ds;
1765
1766 if (!ds->ops->set_rxnfc)
1767 return -EOPNOTSUPP;
1768
1769 return ds->ops->set_rxnfc(ds, dp->index, nfc);
1770 }
1771
1772 static int dsa_user_get_ts_info(struct net_device *dev,
1773 struct kernel_ethtool_ts_info *ts)
1774 {
1775 struct dsa_user_priv *p = netdev_priv(dev);
1776 struct dsa_switch *ds = p->dp->ds;
1777
1778 if (!ds->ops->get_ts_info)
1779 return -EOPNOTSUPP;
1780
1781 return ds->ops->get_ts_info(ds, p->dp->index, ts);
1782 }
1783
1784 static int dsa_user_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
1785 u16 vid)
1786 {
1787 struct dsa_port *dp = dsa_user_to_port(dev);
1788 struct switchdev_obj_port_vlan vlan = {
1789 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
1790 .vid = vid,
1791 /* This API only allows programming tagged, non-PVID VIDs */
1792 .flags = 0,
1793 };
1794 struct netlink_ext_ack extack = {0};
1795 struct dsa_switch *ds = dp->ds;
1796 struct netdev_hw_addr *ha;
1797 struct dsa_vlan *v;
1798 int ret;
1799
1800 /* User port... */
1801 ret = dsa_port_vlan_add(dp, &vlan, &extack);
1802 if (ret) {
1803 if (extack._msg)
1804 netdev_err(dev, "%s\n", extack._msg);
1805 return ret;
1806 }
1807
1808 /* And CPU port... */
1809 ret = dsa_port_host_vlan_add(dp, &vlan, &extack);
1810 if (ret) {
1811 if (extack._msg)
1812 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index,
1813 extack._msg);
1814 return ret;
1815 }
1816
1817 if (!dsa_switch_supports_uc_filtering(ds) &&
1818 !dsa_switch_supports_mc_filtering(ds))
1819 return 0;
1820
1821 v = kzalloc(sizeof(*v), GFP_KERNEL);
1822 if (!v) {
1823 ret = -ENOMEM;
1824 goto rollback;
1825 }
1826
1827 netif_addr_lock_bh(dev);
1828
1829 v->vid = vid;
1830 list_add_tail(&v->list, &dp->user_vlans);
1831
1832 if (dsa_switch_supports_mc_filtering(ds)) {
1833 netdev_for_each_synced_mc_addr(ha, dev) {
1834 dsa_user_schedule_standalone_work(dev, DSA_MC_ADD,
1835 ha->addr, vid);
1836 }
1837 }
1838
1839 if (dsa_switch_supports_uc_filtering(ds)) {
1840 netdev_for_each_synced_uc_addr(ha, dev) {
1841 dsa_user_schedule_standalone_work(dev, DSA_UC_ADD,
1842 ha->addr, vid);
1843 }
1844 }
1845
1846 netif_addr_unlock_bh(dev);
1847
1848 dsa_flush_workqueue();
1849
1850 return 0;
1851
1852 rollback:
1853 dsa_port_host_vlan_del(dp, &vlan);
1854 dsa_port_vlan_del(dp, &vlan);
1855
1856 return ret;
1857 }
1858
1859 static int dsa_user_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
1860 u16 vid)
1861 {
1862 struct dsa_port *dp = dsa_user_to_port(dev);
1863 struct switchdev_obj_port_vlan vlan = {
1864 .vid = vid,
1865 /* This API only allows programming tagged, non-PVID VIDs */
1866 .flags = 0,
1867 };
1868 struct dsa_switch *ds = dp->ds;
1869 struct netdev_hw_addr *ha;
1870 struct dsa_vlan *v;
1871 int err;
1872
1873 err = dsa_port_vlan_del(dp, &vlan);
1874 if (err)
1875 return err;
1876
1877 err = dsa_port_host_vlan_del(dp, &vlan);
1878 if (err)
1879 return err;
1880
1881 if (!dsa_switch_supports_uc_filtering(ds) &&
1882 !dsa_switch_supports_mc_filtering(ds))
1883 return 0;
1884
1885 netif_addr_lock_bh(dev);
1886
1887 v = dsa_vlan_find(&dp->user_vlans, &vlan);
1888 if (!v) {
1889 netif_addr_unlock_bh(dev);
1890 return -ENOENT;
1891 }
1892
1893 list_del(&v->list);
1894 kfree(v);
1895
1896 if (dsa_switch_supports_mc_filtering(ds)) {
1897 netdev_for_each_synced_mc_addr(ha, dev) {
1898 dsa_user_schedule_standalone_work(dev, DSA_MC_DEL,
1899 ha->addr, vid);
1900 }
1901 }
1902
1903 if (dsa_switch_supports_uc_filtering(ds)) {
1904 netdev_for_each_synced_uc_addr(ha, dev) {
1905 dsa_user_schedule_standalone_work(dev, DSA_UC_DEL,
1906 ha->addr, vid);
1907 }
1908 }
1909
1910 netif_addr_unlock_bh(dev);
1911
1912 dsa_flush_workqueue();
1913
1914 return 0;
1915 }
1916
1917 static int dsa_user_restore_vlan(struct net_device *vdev, int vid, void *arg)
1918 {
1919 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q);
1920
1921 return dsa_user_vlan_rx_add_vid(arg, proto, vid);
1922 }
1923
1924 static int dsa_user_clear_vlan(struct net_device *vdev, int vid, void *arg)
1925 {
1926 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q);
1927
1928 return dsa_user_vlan_rx_kill_vid(arg, proto, vid);
1929 }
1930
1931 /* Keep the VLAN RX filtering list in sync with the hardware only if VLAN
1932 * filtering is enabled. The baseline is that only ports that offload a
1933 * VLAN-aware bridge are VLAN-aware, and standalone ports are VLAN-unaware,
1934 * but there are exceptions for quirky hardware.
1935 *
1936 * If ds->vlan_filtering_is_global = true, then standalone ports which share
1937 * the same switch with other ports that offload a VLAN-aware bridge are also
1938 * inevitably VLAN-aware.
1939 *
1940 * To summarize, a DSA switch port offloads:
1941 *
1942 * - If standalone (this includes software bridge, software LAG):
1943 * - if ds->needs_standalone_vlan_filtering = true, OR if
1944 * (ds->vlan_filtering_is_global = true AND there are bridges spanning
1945 * this switch chip which have vlan_filtering=1)
1946 * - the 8021q upper VLANs
1947 * - else (standalone VLAN filtering is not needed, VLAN filtering is not
1948 * global, or it is, but no port is under a VLAN-aware bridge):
1949 * - no VLAN (any 8021q upper is a software VLAN)
1950 *
1951 * - If under a vlan_filtering=0 bridge which it offload:
1952 * - if ds->configure_vlan_while_not_filtering = true (default):
1953 * - the bridge VLANs. These VLANs are committed to hardware but inactive.
1954 * - else (deprecated):
1955 * - no VLAN. The bridge VLANs are not restored when VLAN awareness is
1956 * enabled, so this behavior is broken and discouraged.
1957 *
1958 * - If under a vlan_filtering=1 bridge which it offload:
1959 * - the bridge VLANs
1960 * - the 8021q upper VLANs
1961 */
1962 int dsa_user_manage_vlan_filtering(struct net_device *user,
1963 bool vlan_filtering)
1964 {
1965 int err;
1966
1967 if (vlan_filtering) {
1968 user->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1969
1970 err = vlan_for_each(user, dsa_user_restore_vlan, user);
1971 if (err) {
1972 vlan_for_each(user, dsa_user_clear_vlan, user);
1973 user->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
1974 return err;
1975 }
1976 } else {
1977 err = vlan_for_each(user, dsa_user_clear_vlan, user);
1978 if (err)
1979 return err;
1980
1981 user->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
1982 }
1983
1984 return 0;
1985 }
1986
1987 struct dsa_hw_port {
1988 struct list_head list;
1989 struct net_device *dev;
1990 int old_mtu;
1991 };
1992
1993 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu)
1994 {
1995 const struct dsa_hw_port *p;
1996 int err;
1997
1998 list_for_each_entry(p, hw_port_list, list) {
1999 if (p->dev->mtu == mtu)
2000 continue;
2001
2002 err = dev_set_mtu(p->dev, mtu);
2003 if (err)
2004 goto rollback;
2005 }
2006
2007 return 0;
2008
2009 rollback:
2010 list_for_each_entry_continue_reverse(p, hw_port_list, list) {
2011 if (p->dev->mtu == p->old_mtu)
2012 continue;
2013
2014 if (dev_set_mtu(p->dev, p->old_mtu))
2015 netdev_err(p->dev, "Failed to restore MTU\n");
2016 }
2017
2018 return err;
2019 }
2020
2021 static void dsa_hw_port_list_free(struct list_head *hw_port_list)
2022 {
2023 struct dsa_hw_port *p, *n;
2024
2025 list_for_each_entry_safe(p, n, hw_port_list, list)
2026 kfree(p);
2027 }
2028
2029 /* Make the hardware datapath to/from @dev limited to a common MTU */
2030 static void dsa_bridge_mtu_normalization(struct dsa_port *dp)
2031 {
2032 struct list_head hw_port_list;
2033 struct dsa_switch_tree *dst;
2034 int min_mtu = ETH_MAX_MTU;
2035 struct dsa_port *other_dp;
2036 int err;
2037
2038 if (!dp->ds->mtu_enforcement_ingress)
2039 return;
2040
2041 if (!dp->bridge)
2042 return;
2043
2044 INIT_LIST_HEAD(&hw_port_list);
2045
2046 /* Populate the list of ports that are part of the same bridge
2047 * as the newly added/modified port
2048 */
2049 list_for_each_entry(dst, &dsa_tree_list, list) {
2050 list_for_each_entry(other_dp, &dst->ports, list) {
2051 struct dsa_hw_port *hw_port;
2052 struct net_device *user;
2053
2054 if (other_dp->type != DSA_PORT_TYPE_USER)
2055 continue;
2056
2057 if (!dsa_port_bridge_same(dp, other_dp))
2058 continue;
2059
2060 if (!other_dp->ds->mtu_enforcement_ingress)
2061 continue;
2062
2063 user = other_dp->user;
2064
2065 if (min_mtu > user->mtu)
2066 min_mtu = user->mtu;
2067
2068 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL);
2069 if (!hw_port)
2070 goto out;
2071
2072 hw_port->dev = user;
2073 hw_port->old_mtu = user->mtu;
2074
2075 list_add(&hw_port->list, &hw_port_list);
2076 }
2077 }
2078
2079 /* Attempt to configure the entire hardware bridge to the newly added
2080 * interface's MTU first, regardless of whether the intention of the
2081 * user was to raise or lower it.
2082 */
2083 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->user->mtu);
2084 if (!err)
2085 goto out;
2086
2087 /* Clearly that didn't work out so well, so just set the minimum MTU on
2088 * all hardware bridge ports now. If this fails too, then all ports will
2089 * still have their old MTU rolled back anyway.
2090 */
2091 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu);
2092
2093 out:
2094 dsa_hw_port_list_free(&hw_port_list);
2095 }
2096
2097 int dsa_user_change_mtu(struct net_device *dev, int new_mtu)
2098 {
2099 struct net_device *conduit = dsa_user_to_conduit(dev);
2100 struct dsa_port *dp = dsa_user_to_port(dev);
2101 struct dsa_port *cpu_dp = dp->cpu_dp;
2102 struct dsa_switch *ds = dp->ds;
2103 struct dsa_port *other_dp;
2104 int largest_mtu = 0;
2105 int new_conduit_mtu;
2106 int old_conduit_mtu;
2107 int mtu_limit;
2108 int overhead;
2109 int cpu_mtu;
2110 int err;
2111
2112 if (!ds->ops->port_change_mtu)
2113 return -EOPNOTSUPP;
2114
2115 dsa_tree_for_each_user_port(other_dp, ds->dst) {
2116 int user_mtu;
2117
2118 /* During probe, this function will be called for each user
2119 * device, while not all of them have been allocated. That's
2120 * ok, it doesn't change what the maximum is, so ignore it.
2121 */
2122 if (!other_dp->user)
2123 continue;
2124
2125 /* Pretend that we already applied the setting, which we
2126 * actually haven't (still haven't done all integrity checks)
2127 */
2128 if (dp == other_dp)
2129 user_mtu = new_mtu;
2130 else
2131 user_mtu = other_dp->user->mtu;
2132
2133 if (largest_mtu < user_mtu)
2134 largest_mtu = user_mtu;
2135 }
2136
2137 overhead = dsa_tag_protocol_overhead(cpu_dp->tag_ops);
2138 mtu_limit = min_t(int, conduit->max_mtu, dev->max_mtu + overhead);
2139 old_conduit_mtu = conduit->mtu;
2140 new_conduit_mtu = largest_mtu + overhead;
2141 if (new_conduit_mtu > mtu_limit)
2142 return -ERANGE;
2143
2144 /* If the conduit MTU isn't over limit, there's no need to check the CPU
2145 * MTU, since that surely isn't either.
2146 */
2147 cpu_mtu = largest_mtu;
2148
2149 /* Start applying stuff */
2150 if (new_conduit_mtu != old_conduit_mtu) {
2151 err = dev_set_mtu(conduit, new_conduit_mtu);
2152 if (err < 0)
2153 goto out_conduit_failed;
2154
2155 /* We only need to propagate the MTU of the CPU port to
2156 * upstream switches, so emit a notifier which updates them.
2157 */
2158 err = dsa_port_mtu_change(cpu_dp, cpu_mtu);
2159 if (err)
2160 goto out_cpu_failed;
2161 }
2162
2163 err = ds->ops->port_change_mtu(ds, dp->index, new_mtu);
2164 if (err)
2165 goto out_port_failed;
2166
2167 WRITE_ONCE(dev->mtu, new_mtu);
2168
2169 dsa_bridge_mtu_normalization(dp);
2170
2171 return 0;
2172
2173 out_port_failed:
2174 if (new_conduit_mtu != old_conduit_mtu)
2175 dsa_port_mtu_change(cpu_dp, old_conduit_mtu - overhead);
2176 out_cpu_failed:
2177 if (new_conduit_mtu != old_conduit_mtu)
2178 dev_set_mtu(conduit, old_conduit_mtu);
2179 out_conduit_failed:
2180 return err;
2181 }
2182
2183 static int __maybe_unused
2184 dsa_user_dcbnl_set_apptrust(struct net_device *dev, u8 *sel, int nsel)
2185 {
2186 struct dsa_port *dp = dsa_user_to_port(dev);
2187 struct dsa_switch *ds = dp->ds;
2188 int port = dp->index;
2189
2190 if (!ds->ops->port_set_apptrust)
2191 return -EOPNOTSUPP;
2192
2193 return ds->ops->port_set_apptrust(ds, port, sel, nsel);
2194 }
2195
2196 static int __maybe_unused
2197 dsa_user_dcbnl_get_apptrust(struct net_device *dev, u8 *sel, int *nsel)
2198 {
2199 struct dsa_port *dp = dsa_user_to_port(dev);
2200 struct dsa_switch *ds = dp->ds;
2201 int port = dp->index;
2202
2203 if (!ds->ops->port_get_apptrust)
2204 return -EOPNOTSUPP;
2205
2206 return ds->ops->port_get_apptrust(ds, port, sel, nsel);
2207 }
2208
2209 static int __maybe_unused
2210 dsa_user_dcbnl_set_default_prio(struct net_device *dev, struct dcb_app *app)
2211 {
2212 struct dsa_port *dp = dsa_user_to_port(dev);
2213 struct dsa_switch *ds = dp->ds;
2214 unsigned long mask, new_prio;
2215 int err, port = dp->index;
2216
2217 if (!ds->ops->port_set_default_prio)
2218 return -EOPNOTSUPP;
2219
2220 err = dcb_ieee_setapp(dev, app);
2221 if (err)
2222 return err;
2223
2224 mask = dcb_ieee_getapp_mask(dev, app);
2225 new_prio = __fls(mask);
2226
2227 err = ds->ops->port_set_default_prio(ds, port, new_prio);
2228 if (err) {
2229 dcb_ieee_delapp(dev, app);
2230 return err;
2231 }
2232
2233 return 0;
2234 }
2235
2236 /* Update the DSCP prio entries on all user ports of the switch in case
2237 * the switch supports global DSCP prio instead of per port DSCP prios.
2238 */
2239 static int dsa_user_dcbnl_ieee_global_dscp_setdel(struct net_device *dev,
2240 struct dcb_app *app, bool del)
2241 {
2242 int (*setdel)(struct net_device *dev, struct dcb_app *app);
2243 struct dsa_port *dp = dsa_user_to_port(dev);
2244 struct dsa_switch *ds = dp->ds;
2245 struct dsa_port *other_dp;
2246 int err, restore_err;
2247
2248 if (del)
2249 setdel = dcb_ieee_delapp;
2250 else
2251 setdel = dcb_ieee_setapp;
2252
2253 dsa_switch_for_each_user_port(other_dp, ds) {
2254 struct net_device *user = other_dp->user;
2255
2256 if (!user || user == dev)
2257 continue;
2258
2259 err = setdel(user, app);
2260 if (err)
2261 goto err_try_to_restore;
2262 }
2263
2264 return 0;
2265
2266 err_try_to_restore:
2267
2268 /* Revert logic to restore previous state of app entries */
2269 if (!del)
2270 setdel = dcb_ieee_delapp;
2271 else
2272 setdel = dcb_ieee_setapp;
2273
2274 dsa_switch_for_each_user_port_continue_reverse(other_dp, ds) {
2275 struct net_device *user = other_dp->user;
2276
2277 if (!user || user == dev)
2278 continue;
2279
2280 restore_err = setdel(user, app);
2281 if (restore_err)
2282 netdev_err(user, "Failed to restore DSCP prio entry configuration\n");
2283 }
2284
2285 return err;
2286 }
2287
2288 static int __maybe_unused
2289 dsa_user_dcbnl_add_dscp_prio(struct net_device *dev, struct dcb_app *app)
2290 {
2291 struct dsa_port *dp = dsa_user_to_port(dev);
2292 struct dsa_switch *ds = dp->ds;
2293 unsigned long mask, new_prio;
2294 int err, port = dp->index;
2295 u8 dscp = app->protocol;
2296
2297 if (!ds->ops->port_add_dscp_prio)
2298 return -EOPNOTSUPP;
2299
2300 if (dscp >= 64) {
2301 netdev_err(dev, "DSCP APP entry with protocol value %u is invalid\n",
2302 dscp);
2303 return -EINVAL;
2304 }
2305
2306 err = dcb_ieee_setapp(dev, app);
2307 if (err)
2308 return err;
2309
2310 mask = dcb_ieee_getapp_mask(dev, app);
2311 new_prio = __fls(mask);
2312
2313 err = ds->ops->port_add_dscp_prio(ds, port, dscp, new_prio);
2314 if (err) {
2315 dcb_ieee_delapp(dev, app);
2316 return err;
2317 }
2318
2319 if (!ds->dscp_prio_mapping_is_global)
2320 return 0;
2321
2322 err = dsa_user_dcbnl_ieee_global_dscp_setdel(dev, app, false);
2323 if (err) {
2324 if (ds->ops->port_del_dscp_prio)
2325 ds->ops->port_del_dscp_prio(ds, port, dscp, new_prio);
2326 dcb_ieee_delapp(dev, app);
2327 return err;
2328 }
2329
2330 return 0;
2331 }
2332
2333 static int __maybe_unused dsa_user_dcbnl_ieee_setapp(struct net_device *dev,
2334 struct dcb_app *app)
2335 {
2336 switch (app->selector) {
2337 case IEEE_8021QAZ_APP_SEL_ETHERTYPE:
2338 switch (app->protocol) {
2339 case 0:
2340 return dsa_user_dcbnl_set_default_prio(dev, app);
2341 default:
2342 return -EOPNOTSUPP;
2343 }
2344 break;
2345 case IEEE_8021QAZ_APP_SEL_DSCP:
2346 return dsa_user_dcbnl_add_dscp_prio(dev, app);
2347 default:
2348 return -EOPNOTSUPP;
2349 }
2350 }
2351
2352 static int __maybe_unused
2353 dsa_user_dcbnl_del_default_prio(struct net_device *dev, struct dcb_app *app)
2354 {
2355 struct dsa_port *dp = dsa_user_to_port(dev);
2356 struct dsa_switch *ds = dp->ds;
2357 unsigned long mask, new_prio;
2358 int err, port = dp->index;
2359
2360 if (!ds->ops->port_set_default_prio)
2361 return -EOPNOTSUPP;
2362
2363 err = dcb_ieee_delapp(dev, app);
2364 if (err)
2365 return err;
2366
2367 mask = dcb_ieee_getapp_mask(dev, app);
2368 new_prio = mask ? __fls(mask) : 0;
2369
2370 err = ds->ops->port_set_default_prio(ds, port, new_prio);
2371 if (err) {
2372 dcb_ieee_setapp(dev, app);
2373 return err;
2374 }
2375
2376 return 0;
2377 }
2378
2379 static int __maybe_unused
2380 dsa_user_dcbnl_del_dscp_prio(struct net_device *dev, struct dcb_app *app)
2381 {
2382 struct dsa_port *dp = dsa_user_to_port(dev);
2383 struct dsa_switch *ds = dp->ds;
2384 int err, port = dp->index;
2385 u8 dscp = app->protocol;
2386
2387 if (!ds->ops->port_del_dscp_prio)
2388 return -EOPNOTSUPP;
2389
2390 err = dcb_ieee_delapp(dev, app);
2391 if (err)
2392 return err;
2393
2394 err = ds->ops->port_del_dscp_prio(ds, port, dscp, app->priority);
2395 if (err) {
2396 dcb_ieee_setapp(dev, app);
2397 return err;
2398 }
2399
2400 if (!ds->dscp_prio_mapping_is_global)
2401 return 0;
2402
2403 err = dsa_user_dcbnl_ieee_global_dscp_setdel(dev, app, true);
2404 if (err) {
2405 if (ds->ops->port_add_dscp_prio)
2406 ds->ops->port_add_dscp_prio(ds, port, dscp,
2407 app->priority);
2408 dcb_ieee_setapp(dev, app);
2409 return err;
2410 }
2411
2412 return 0;
2413 }
2414
2415 static int __maybe_unused dsa_user_dcbnl_ieee_delapp(struct net_device *dev,
2416 struct dcb_app *app)
2417 {
2418 switch (app->selector) {
2419 case IEEE_8021QAZ_APP_SEL_ETHERTYPE:
2420 switch (app->protocol) {
2421 case 0:
2422 return dsa_user_dcbnl_del_default_prio(dev, app);
2423 default:
2424 return -EOPNOTSUPP;
2425 }
2426 break;
2427 case IEEE_8021QAZ_APP_SEL_DSCP:
2428 return dsa_user_dcbnl_del_dscp_prio(dev, app);
2429 default:
2430 return -EOPNOTSUPP;
2431 }
2432 }
2433
2434 /* Pre-populate the DCB application priority table with the priorities
2435 * configured during switch setup, which we read from hardware here.
2436 */
2437 static int dsa_user_dcbnl_init(struct net_device *dev)
2438 {
2439 struct dsa_port *dp = dsa_user_to_port(dev);
2440 struct dsa_switch *ds = dp->ds;
2441 int port = dp->index;
2442 int err;
2443
2444 if (ds->ops->port_get_default_prio) {
2445 int prio = ds->ops->port_get_default_prio(ds, port);
2446 struct dcb_app app = {
2447 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE,
2448 .protocol = 0,
2449 .priority = prio,
2450 };
2451
2452 if (prio < 0)
2453 return prio;
2454
2455 err = dcb_ieee_setapp(dev, &app);
2456 if (err)
2457 return err;
2458 }
2459
2460 if (ds->ops->port_get_dscp_prio) {
2461 int protocol;
2462
2463 for (protocol = 0; protocol < 64; protocol++) {
2464 struct dcb_app app = {
2465 .selector = IEEE_8021QAZ_APP_SEL_DSCP,
2466 .protocol = protocol,
2467 };
2468 int prio;
2469
2470 prio = ds->ops->port_get_dscp_prio(ds, port, protocol);
2471 if (prio == -EOPNOTSUPP)
2472 continue;
2473 if (prio < 0)
2474 return prio;
2475
2476 app.priority = prio;
2477
2478 err = dcb_ieee_setapp(dev, &app);
2479 if (err)
2480 return err;
2481 }
2482 }
2483
2484 return 0;
2485 }
2486
2487 static const struct ethtool_ops dsa_user_ethtool_ops = {
2488 .get_drvinfo = dsa_user_get_drvinfo,
2489 .get_regs_len = dsa_user_get_regs_len,
2490 .get_regs = dsa_user_get_regs,
2491 .nway_reset = dsa_user_nway_reset,
2492 .get_link = ethtool_op_get_link,
2493 .get_eeprom_len = dsa_user_get_eeprom_len,
2494 .get_eeprom = dsa_user_get_eeprom,
2495 .set_eeprom = dsa_user_set_eeprom,
2496 .get_strings = dsa_user_get_strings,
2497 .get_ethtool_stats = dsa_user_get_ethtool_stats,
2498 .get_sset_count = dsa_user_get_sset_count,
2499 .get_eth_phy_stats = dsa_user_get_eth_phy_stats,
2500 .get_eth_mac_stats = dsa_user_get_eth_mac_stats,
2501 .get_eth_ctrl_stats = dsa_user_get_eth_ctrl_stats,
2502 .get_rmon_stats = dsa_user_get_rmon_stats,
2503 .set_wol = dsa_user_set_wol,
2504 .get_wol = dsa_user_get_wol,
2505 .set_eee = dsa_user_set_eee,
2506 .get_eee = dsa_user_get_eee,
2507 .get_link_ksettings = dsa_user_get_link_ksettings,
2508 .set_link_ksettings = dsa_user_set_link_ksettings,
2509 .get_pause_stats = dsa_user_get_pause_stats,
2510 .get_pauseparam = dsa_user_get_pauseparam,
2511 .set_pauseparam = dsa_user_set_pauseparam,
2512 .get_rxnfc = dsa_user_get_rxnfc,
2513 .set_rxnfc = dsa_user_set_rxnfc,
2514 .get_ts_info = dsa_user_get_ts_info,
2515 .self_test = dsa_user_net_selftest,
2516 .get_mm = dsa_user_get_mm,
2517 .set_mm = dsa_user_set_mm,
2518 .get_mm_stats = dsa_user_get_mm_stats,
2519 };
2520
2521 static const struct dcbnl_rtnl_ops __maybe_unused dsa_user_dcbnl_ops = {
2522 .ieee_setapp = dsa_user_dcbnl_ieee_setapp,
2523 .ieee_delapp = dsa_user_dcbnl_ieee_delapp,
2524 .dcbnl_setapptrust = dsa_user_dcbnl_set_apptrust,
2525 .dcbnl_getapptrust = dsa_user_dcbnl_get_apptrust,
2526 };
2527
2528 static void dsa_user_get_stats64(struct net_device *dev,
2529 struct rtnl_link_stats64 *s)
2530 {
2531 struct dsa_port *dp = dsa_user_to_port(dev);
2532 struct dsa_switch *ds = dp->ds;
2533
2534 if (ds->ops->get_stats64)
2535 ds->ops->get_stats64(ds, dp->index, s);
2536 else
2537 dev_get_tstats64(dev, s);
2538 }
2539
2540 static int dsa_user_fill_forward_path(struct net_device_path_ctx *ctx,
2541 struct net_device_path *path)
2542 {
2543 struct dsa_port *dp = dsa_user_to_port(ctx->dev);
2544 struct net_device *conduit = dsa_port_to_conduit(dp);
2545 struct dsa_port *cpu_dp = dp->cpu_dp;
2546
2547 path->dev = ctx->dev;
2548 path->type = DEV_PATH_DSA;
2549 path->dsa.proto = cpu_dp->tag_ops->proto;
2550 path->dsa.port = dp->index;
2551 ctx->dev = conduit;
2552
2553 return 0;
2554 }
2555
2556 static const struct net_device_ops dsa_user_netdev_ops = {
2557 .ndo_open = dsa_user_open,
2558 .ndo_stop = dsa_user_close,
2559 .ndo_start_xmit = dsa_user_xmit,
2560 .ndo_change_rx_flags = dsa_user_change_rx_flags,
2561 .ndo_set_rx_mode = dsa_user_set_rx_mode,
2562 .ndo_set_mac_address = dsa_user_set_mac_address,
2563 .ndo_fdb_dump = dsa_user_fdb_dump,
2564 .ndo_eth_ioctl = dsa_user_ioctl,
2565 .ndo_get_iflink = dsa_user_get_iflink,
2566 #ifdef CONFIG_NET_POLL_CONTROLLER
2567 .ndo_netpoll_setup = dsa_user_netpoll_setup,
2568 .ndo_netpoll_cleanup = dsa_user_netpoll_cleanup,
2569 .ndo_poll_controller = dsa_user_poll_controller,
2570 #endif
2571 .ndo_setup_tc = dsa_user_setup_tc,
2572 .ndo_get_stats64 = dsa_user_get_stats64,
2573 .ndo_vlan_rx_add_vid = dsa_user_vlan_rx_add_vid,
2574 .ndo_vlan_rx_kill_vid = dsa_user_vlan_rx_kill_vid,
2575 .ndo_change_mtu = dsa_user_change_mtu,
2576 .ndo_fill_forward_path = dsa_user_fill_forward_path,
2577 };
2578
2579 static const struct device_type dsa_type = {
2580 .name = "dsa",
2581 };
2582
2583 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
2584 {
2585 const struct dsa_port *dp = dsa_to_port(ds, port);
2586
2587 if (dp->pl)
2588 phylink_mac_change(dp->pl, up);
2589 }
2590 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
2591
2592 static void dsa_user_phylink_fixed_state(struct phylink_config *config,
2593 struct phylink_link_state *state)
2594 {
2595 struct dsa_port *dp = dsa_phylink_to_port(config);
2596 struct dsa_switch *ds = dp->ds;
2597
2598 /* No need to check that this operation is valid, the callback would
2599 * not be called if it was not.
2600 */
2601 ds->ops->phylink_fixed_state(ds, dp->index, state);
2602 }
2603
2604 /* user device setup *******************************************************/
2605 static int dsa_user_phy_connect(struct net_device *user_dev, int addr,
2606 u32 flags)
2607 {
2608 struct dsa_port *dp = dsa_user_to_port(user_dev);
2609 struct dsa_switch *ds = dp->ds;
2610
2611 user_dev->phydev = mdiobus_get_phy(ds->user_mii_bus, addr);
2612 if (!user_dev->phydev) {
2613 netdev_err(user_dev, "no phy at %d\n", addr);
2614 return -ENODEV;
2615 }
2616
2617 user_dev->phydev->dev_flags |= flags;
2618
2619 return phylink_connect_phy(dp->pl, user_dev->phydev);
2620 }
2621
2622 static int dsa_user_phy_setup(struct net_device *user_dev)
2623 {
2624 struct dsa_port *dp = dsa_user_to_port(user_dev);
2625 struct device_node *port_dn = dp->dn;
2626 struct dsa_switch *ds = dp->ds;
2627 u32 phy_flags = 0;
2628 int ret;
2629
2630 dp->pl_config.dev = &user_dev->dev;
2631 dp->pl_config.type = PHYLINK_NETDEV;
2632
2633 /* The get_fixed_state callback takes precedence over polling the
2634 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set
2635 * this if the switch provides such a callback.
2636 */
2637 if (ds->ops->phylink_fixed_state) {
2638 dp->pl_config.get_fixed_state = dsa_user_phylink_fixed_state;
2639 dp->pl_config.poll_fixed_state = true;
2640 }
2641
2642 ret = dsa_port_phylink_create(dp);
2643 if (ret)
2644 return ret;
2645
2646 if (ds->ops->get_phy_flags)
2647 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
2648
2649 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
2650 if (ret == -ENODEV && ds->user_mii_bus) {
2651 /* We could not connect to a designated PHY or SFP, so try to
2652 * use the switch internal MDIO bus instead
2653 */
2654 ret = dsa_user_phy_connect(user_dev, dp->index, phy_flags);
2655 }
2656 if (ret) {
2657 netdev_err(user_dev, "failed to connect to PHY: %pe\n",
2658 ERR_PTR(ret));
2659 dsa_port_phylink_destroy(dp);
2660 }
2661
2662 return ret;
2663 }
2664
2665 void dsa_user_setup_tagger(struct net_device *user)
2666 {
2667 struct dsa_port *dp = dsa_user_to_port(user);
2668 struct net_device *conduit = dsa_port_to_conduit(dp);
2669 struct dsa_user_priv *p = netdev_priv(user);
2670 const struct dsa_port *cpu_dp = dp->cpu_dp;
2671 const struct dsa_switch *ds = dp->ds;
2672
2673 user->needed_headroom = cpu_dp->tag_ops->needed_headroom;
2674 user->needed_tailroom = cpu_dp->tag_ops->needed_tailroom;
2675 /* Try to save one extra realloc later in the TX path (in the conduit)
2676 * by also inheriting the conduit's needed headroom and tailroom.
2677 * The 8021q driver also does this.
2678 */
2679 user->needed_headroom += conduit->needed_headroom;
2680 user->needed_tailroom += conduit->needed_tailroom;
2681
2682 p->xmit = cpu_dp->tag_ops->xmit;
2683
2684 user->features = conduit->vlan_features | NETIF_F_HW_TC;
2685 user->hw_features |= NETIF_F_HW_TC;
2686 if (user->needed_tailroom)
2687 user->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST);
2688 if (ds->needs_standalone_vlan_filtering)
2689 user->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
2690
2691 user->lltx = true;
2692 }
2693
2694 int dsa_user_suspend(struct net_device *user_dev)
2695 {
2696 struct dsa_port *dp = dsa_user_to_port(user_dev);
2697
2698 if (!netif_running(user_dev))
2699 return 0;
2700
2701 netif_device_detach(user_dev);
2702
2703 rtnl_lock();
2704 phylink_stop(dp->pl);
2705 rtnl_unlock();
2706
2707 return 0;
2708 }
2709
2710 int dsa_user_resume(struct net_device *user_dev)
2711 {
2712 struct dsa_port *dp = dsa_user_to_port(user_dev);
2713
2714 if (!netif_running(user_dev))
2715 return 0;
2716
2717 netif_device_attach(user_dev);
2718
2719 rtnl_lock();
2720 phylink_start(dp->pl);
2721 rtnl_unlock();
2722
2723 return 0;
2724 }
2725
2726 int dsa_user_create(struct dsa_port *port)
2727 {
2728 struct net_device *conduit = dsa_port_to_conduit(port);
2729 struct dsa_switch *ds = port->ds;
2730 struct net_device *user_dev;
2731 struct dsa_user_priv *p;
2732 const char *name;
2733 int assign_type;
2734 int ret;
2735
2736 if (!ds->num_tx_queues)
2737 ds->num_tx_queues = 1;
2738
2739 if (port->name) {
2740 name = port->name;
2741 assign_type = NET_NAME_PREDICTABLE;
2742 } else {
2743 name = "eth%d";
2744 assign_type = NET_NAME_ENUM;
2745 }
2746
2747 user_dev = alloc_netdev_mqs(sizeof(struct dsa_user_priv), name,
2748 assign_type, ether_setup,
2749 ds->num_tx_queues, 1);
2750 if (user_dev == NULL)
2751 return -ENOMEM;
2752
2753 user_dev->rtnl_link_ops = &dsa_link_ops;
2754 user_dev->ethtool_ops = &dsa_user_ethtool_ops;
2755 #if IS_ENABLED(CONFIG_DCB)
2756 user_dev->dcbnl_ops = &dsa_user_dcbnl_ops;
2757 #endif
2758 if (!is_zero_ether_addr(port->mac))
2759 eth_hw_addr_set(user_dev, port->mac);
2760 else
2761 eth_hw_addr_inherit(user_dev, conduit);
2762 user_dev->priv_flags |= IFF_NO_QUEUE;
2763 if (dsa_switch_supports_uc_filtering(ds))
2764 user_dev->priv_flags |= IFF_UNICAST_FLT;
2765 user_dev->netdev_ops = &dsa_user_netdev_ops;
2766 if (ds->ops->port_max_mtu)
2767 user_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index);
2768 SET_NETDEV_DEVTYPE(user_dev, &dsa_type);
2769
2770 SET_NETDEV_DEV(user_dev, port->ds->dev);
2771 SET_NETDEV_DEVLINK_PORT(user_dev, &port->devlink_port);
2772 user_dev->dev.of_node = port->dn;
2773 user_dev->vlan_features = conduit->vlan_features;
2774
2775 p = netdev_priv(user_dev);
2776 user_dev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS;
2777
2778 ret = gro_cells_init(&p->gcells, user_dev);
2779 if (ret)
2780 goto out_free;
2781
2782 p->dp = port;
2783 INIT_LIST_HEAD(&p->mall_tc_list);
2784 port->user = user_dev;
2785 dsa_user_setup_tagger(user_dev);
2786
2787 netif_carrier_off(user_dev);
2788
2789 ret = dsa_user_phy_setup(user_dev);
2790 if (ret) {
2791 netdev_err(user_dev,
2792 "error %d setting up PHY for tree %d, switch %d, port %d\n",
2793 ret, ds->dst->index, ds->index, port->index);
2794 goto out_gcells;
2795 }
2796
2797 rtnl_lock();
2798
2799 ret = dsa_user_change_mtu(user_dev, ETH_DATA_LEN);
2800 if (ret && ret != -EOPNOTSUPP)
2801 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n",
2802 ret, ETH_DATA_LEN, port->index);
2803
2804 ret = register_netdevice(user_dev);
2805 if (ret) {
2806 netdev_err(conduit, "error %d registering interface %s\n",
2807 ret, user_dev->name);
2808 rtnl_unlock();
2809 goto out_phy;
2810 }
2811
2812 if (IS_ENABLED(CONFIG_DCB)) {
2813 ret = dsa_user_dcbnl_init(user_dev);
2814 if (ret) {
2815 netdev_err(user_dev,
2816 "failed to initialize DCB: %pe\n",
2817 ERR_PTR(ret));
2818 rtnl_unlock();
2819 goto out_unregister;
2820 }
2821 }
2822
2823 ret = netdev_upper_dev_link(conduit, user_dev, NULL);
2824
2825 rtnl_unlock();
2826
2827 if (ret)
2828 goto out_unregister;
2829
2830 return 0;
2831
2832 out_unregister:
2833 unregister_netdev(user_dev);
2834 out_phy:
2835 rtnl_lock();
2836 phylink_disconnect_phy(p->dp->pl);
2837 rtnl_unlock();
2838 dsa_port_phylink_destroy(p->dp);
2839 out_gcells:
2840 gro_cells_destroy(&p->gcells);
2841 out_free:
2842 free_netdev(user_dev);
2843 port->user = NULL;
2844 return ret;
2845 }
2846
2847 void dsa_user_destroy(struct net_device *user_dev)
2848 {
2849 struct net_device *conduit = dsa_user_to_conduit(user_dev);
2850 struct dsa_port *dp = dsa_user_to_port(user_dev);
2851 struct dsa_user_priv *p = netdev_priv(user_dev);
2852
2853 netif_carrier_off(user_dev);
2854 rtnl_lock();
2855 netdev_upper_dev_unlink(conduit, user_dev);
2856 unregister_netdevice(user_dev);
2857 phylink_disconnect_phy(dp->pl);
2858 rtnl_unlock();
2859
2860 dsa_port_phylink_destroy(dp);
2861 gro_cells_destroy(&p->gcells);
2862 free_netdev(user_dev);
2863 }
2864
2865 int dsa_user_change_conduit(struct net_device *dev, struct net_device *conduit,
2866 struct netlink_ext_ack *extack)
2867 {
2868 struct net_device *old_conduit = dsa_user_to_conduit(dev);
2869 struct dsa_port *dp = dsa_user_to_port(dev);
2870 struct dsa_switch *ds = dp->ds;
2871 struct net_device *upper;
2872 struct list_head *iter;
2873 int err;
2874
2875 if (conduit == old_conduit)
2876 return 0;
2877
2878 if (!ds->ops->port_change_conduit) {
2879 NL_SET_ERR_MSG_MOD(extack,
2880 "Driver does not support changing DSA conduit");
2881 return -EOPNOTSUPP;
2882 }
2883
2884 if (!netdev_uses_dsa(conduit)) {
2885 NL_SET_ERR_MSG_MOD(extack,
2886 "Interface not eligible as DSA conduit");
2887 return -EOPNOTSUPP;
2888 }
2889
2890 netdev_for_each_upper_dev_rcu(conduit, upper, iter) {
2891 if (dsa_user_dev_check(upper))
2892 continue;
2893 if (netif_is_bridge_master(upper))
2894 continue;
2895 NL_SET_ERR_MSG_MOD(extack, "Cannot join conduit with unknown uppers");
2896 return -EOPNOTSUPP;
2897 }
2898
2899 /* Since we allow live-changing the DSA conduit, plus we auto-open the
2900 * DSA conduit when the user port opens => we need to ensure that the
2901 * new DSA conduit is open too.
2902 */
2903 if (dev->flags & IFF_UP) {
2904 err = dev_open(conduit, extack);
2905 if (err)
2906 return err;
2907 }
2908
2909 netdev_upper_dev_unlink(old_conduit, dev);
2910
2911 err = netdev_upper_dev_link(conduit, dev, extack);
2912 if (err)
2913 goto out_revert_old_conduit_unlink;
2914
2915 err = dsa_port_change_conduit(dp, conduit, extack);
2916 if (err)
2917 goto out_revert_conduit_link;
2918
2919 /* Update the MTU of the new CPU port through cross-chip notifiers */
2920 err = dsa_user_change_mtu(dev, dev->mtu);
2921 if (err && err != -EOPNOTSUPP) {
2922 netdev_warn(dev,
2923 "nonfatal error updating MTU with new conduit: %pe\n",
2924 ERR_PTR(err));
2925 }
2926
2927 return 0;
2928
2929 out_revert_conduit_link:
2930 netdev_upper_dev_unlink(conduit, dev);
2931 out_revert_old_conduit_unlink:
2932 netdev_upper_dev_link(old_conduit, dev, NULL);
2933 return err;
2934 }
2935
2936 bool dsa_user_dev_check(const struct net_device *dev)
2937 {
2938 return dev->netdev_ops == &dsa_user_netdev_ops;
2939 }
2940 EXPORT_SYMBOL_GPL(dsa_user_dev_check);
2941
2942 static int dsa_user_changeupper(struct net_device *dev,
2943 struct netdev_notifier_changeupper_info *info)
2944 {
2945 struct netlink_ext_ack *extack;
2946 int err = NOTIFY_DONE;
2947 struct dsa_port *dp;
2948
2949 if (!dsa_user_dev_check(dev))
2950 return err;
2951
2952 dp = dsa_user_to_port(dev);
2953 extack = netdev_notifier_info_to_extack(&info->info);
2954
2955 if (netif_is_bridge_master(info->upper_dev)) {
2956 if (info->linking) {
2957 err = dsa_port_bridge_join(dp, info->upper_dev, extack);
2958 if (!err)
2959 dsa_bridge_mtu_normalization(dp);
2960 if (err == -EOPNOTSUPP) {
2961 NL_SET_ERR_MSG_WEAK_MOD(extack,
2962 "Offloading not supported");
2963 err = 0;
2964 }
2965 err = notifier_from_errno(err);
2966 } else {
2967 dsa_port_bridge_leave(dp, info->upper_dev);
2968 err = NOTIFY_OK;
2969 }
2970 } else if (netif_is_lag_master(info->upper_dev)) {
2971 if (info->linking) {
2972 err = dsa_port_lag_join(dp, info->upper_dev,
2973 info->upper_info, extack);
2974 if (err == -EOPNOTSUPP) {
2975 NL_SET_ERR_MSG_WEAK_MOD(extack,
2976 "Offloading not supported");
2977 err = 0;
2978 }
2979 err = notifier_from_errno(err);
2980 } else {
2981 dsa_port_lag_leave(dp, info->upper_dev);
2982 err = NOTIFY_OK;
2983 }
2984 } else if (is_hsr_master(info->upper_dev)) {
2985 if (info->linking) {
2986 err = dsa_port_hsr_join(dp, info->upper_dev, extack);
2987 if (err == -EOPNOTSUPP) {
2988 NL_SET_ERR_MSG_WEAK_MOD(extack,
2989 "Offloading not supported");
2990 err = 0;
2991 }
2992 err = notifier_from_errno(err);
2993 } else {
2994 dsa_port_hsr_leave(dp, info->upper_dev);
2995 err = NOTIFY_OK;
2996 }
2997 }
2998
2999 return err;
3000 }
3001
3002 static int dsa_user_prechangeupper(struct net_device *dev,
3003 struct netdev_notifier_changeupper_info *info)
3004 {
3005 struct dsa_port *dp;
3006
3007 if (!dsa_user_dev_check(dev))
3008 return NOTIFY_DONE;
3009
3010 dp = dsa_user_to_port(dev);
3011
3012 if (netif_is_bridge_master(info->upper_dev) && !info->linking)
3013 dsa_port_pre_bridge_leave(dp, info->upper_dev);
3014 else if (netif_is_lag_master(info->upper_dev) && !info->linking)
3015 dsa_port_pre_lag_leave(dp, info->upper_dev);
3016 /* dsa_port_pre_hsr_leave is not yet necessary since hsr devices cannot
3017 * meaningfully placed under a bridge yet
3018 */
3019
3020 return NOTIFY_DONE;
3021 }
3022
3023 static int
3024 dsa_user_lag_changeupper(struct net_device *dev,
3025 struct netdev_notifier_changeupper_info *info)
3026 {
3027 struct net_device *lower;
3028 struct list_head *iter;
3029 int err = NOTIFY_DONE;
3030 struct dsa_port *dp;
3031
3032 if (!netif_is_lag_master(dev))
3033 return err;
3034
3035 netdev_for_each_lower_dev(dev, lower, iter) {
3036 if (!dsa_user_dev_check(lower))
3037 continue;
3038
3039 dp = dsa_user_to_port(lower);
3040 if (!dp->lag)
3041 /* Software LAG */
3042 continue;
3043
3044 err = dsa_user_changeupper(lower, info);
3045 if (notifier_to_errno(err))
3046 break;
3047 }
3048
3049 return err;
3050 }
3051
3052 /* Same as dsa_user_lag_changeupper() except that it calls
3053 * dsa_user_prechangeupper()
3054 */
3055 static int
3056 dsa_user_lag_prechangeupper(struct net_device *dev,
3057 struct netdev_notifier_changeupper_info *info)
3058 {
3059 struct net_device *lower;
3060 struct list_head *iter;
3061 int err = NOTIFY_DONE;
3062 struct dsa_port *dp;
3063
3064 if (!netif_is_lag_master(dev))
3065 return err;
3066
3067 netdev_for_each_lower_dev(dev, lower, iter) {
3068 if (!dsa_user_dev_check(lower))
3069 continue;
3070
3071 dp = dsa_user_to_port(lower);
3072 if (!dp->lag)
3073 /* Software LAG */
3074 continue;
3075
3076 err = dsa_user_prechangeupper(lower, info);
3077 if (notifier_to_errno(err))
3078 break;
3079 }
3080
3081 return err;
3082 }
3083
3084 static int
3085 dsa_prevent_bridging_8021q_upper(struct net_device *dev,
3086 struct netdev_notifier_changeupper_info *info)
3087 {
3088 struct netlink_ext_ack *ext_ack;
3089 struct net_device *user, *br;
3090 struct dsa_port *dp;
3091
3092 ext_ack = netdev_notifier_info_to_extack(&info->info);
3093
3094 if (!is_vlan_dev(dev))
3095 return NOTIFY_DONE;
3096
3097 user = vlan_dev_real_dev(dev);
3098 if (!dsa_user_dev_check(user))
3099 return NOTIFY_DONE;
3100
3101 dp = dsa_user_to_port(user);
3102 br = dsa_port_bridge_dev_get(dp);
3103 if (!br)
3104 return NOTIFY_DONE;
3105
3106 /* Deny enslaving a VLAN device into a VLAN-aware bridge */
3107 if (br_vlan_enabled(br) &&
3108 netif_is_bridge_master(info->upper_dev) && info->linking) {
3109 NL_SET_ERR_MSG_MOD(ext_ack,
3110 "Cannot make VLAN device join VLAN-aware bridge");
3111 return notifier_from_errno(-EINVAL);
3112 }
3113
3114 return NOTIFY_DONE;
3115 }
3116
3117 static int
3118 dsa_user_check_8021q_upper(struct net_device *dev,
3119 struct netdev_notifier_changeupper_info *info)
3120 {
3121 struct dsa_port *dp = dsa_user_to_port(dev);
3122 struct net_device *br = dsa_port_bridge_dev_get(dp);
3123 struct bridge_vlan_info br_info;
3124 struct netlink_ext_ack *extack;
3125 int err = NOTIFY_DONE;
3126 u16 vid;
3127
3128 if (!br || !br_vlan_enabled(br))
3129 return NOTIFY_DONE;
3130
3131 extack = netdev_notifier_info_to_extack(&info->info);
3132 vid = vlan_dev_vlan_id(info->upper_dev);
3133
3134 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
3135 * device, respectively the VID is not found, returning
3136 * 0 means success, which is a failure for us here.
3137 */
3138 err = br_vlan_get_info(br, vid, &br_info);
3139 if (err == 0) {
3140 NL_SET_ERR_MSG_MOD(extack,
3141 "This VLAN is already configured by the bridge");
3142 return notifier_from_errno(-EBUSY);
3143 }
3144
3145 return NOTIFY_DONE;
3146 }
3147
3148 static int
3149 dsa_user_prechangeupper_sanity_check(struct net_device *dev,
3150 struct netdev_notifier_changeupper_info *info)
3151 {
3152 struct dsa_switch *ds;
3153 struct dsa_port *dp;
3154 int err;
3155
3156 if (!dsa_user_dev_check(dev))
3157 return dsa_prevent_bridging_8021q_upper(dev, info);
3158
3159 dp = dsa_user_to_port(dev);
3160 ds = dp->ds;
3161
3162 if (ds->ops->port_prechangeupper) {
3163 err = ds->ops->port_prechangeupper(ds, dp->index, info);
3164 if (err)
3165 return notifier_from_errno(err);
3166 }
3167
3168 if (is_vlan_dev(info->upper_dev))
3169 return dsa_user_check_8021q_upper(dev, info);
3170
3171 return NOTIFY_DONE;
3172 }
3173
3174 /* To be eligible as a DSA conduit, a LAG must have all lower interfaces be
3175 * eligible DSA conduits. Additionally, all LAG slaves must be DSA conduits of
3176 * switches in the same switch tree.
3177 */
3178 static int dsa_lag_conduit_validate(struct net_device *lag_dev,
3179 struct netlink_ext_ack *extack)
3180 {
3181 struct net_device *lower1, *lower2;
3182 struct list_head *iter1, *iter2;
3183
3184 netdev_for_each_lower_dev(lag_dev, lower1, iter1) {
3185 netdev_for_each_lower_dev(lag_dev, lower2, iter2) {
3186 if (!netdev_uses_dsa(lower1) ||
3187 !netdev_uses_dsa(lower2)) {
3188 NL_SET_ERR_MSG_MOD(extack,
3189 "All LAG ports must be eligible as DSA conduits");
3190 return notifier_from_errno(-EINVAL);
3191 }
3192
3193 if (lower1 == lower2)
3194 continue;
3195
3196 if (!dsa_port_tree_same(lower1->dsa_ptr,
3197 lower2->dsa_ptr)) {
3198 NL_SET_ERR_MSG_MOD(extack,
3199 "LAG contains DSA conduits of disjoint switch trees");
3200 return notifier_from_errno(-EINVAL);
3201 }
3202 }
3203 }
3204
3205 return NOTIFY_DONE;
3206 }
3207
3208 static int
3209 dsa_conduit_prechangeupper_sanity_check(struct net_device *conduit,
3210 struct netdev_notifier_changeupper_info *info)
3211 {
3212 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info);
3213
3214 if (!netdev_uses_dsa(conduit))
3215 return NOTIFY_DONE;
3216
3217 if (!info->linking)
3218 return NOTIFY_DONE;
3219
3220 /* Allow DSA switch uppers */
3221 if (dsa_user_dev_check(info->upper_dev))
3222 return NOTIFY_DONE;
3223
3224 /* Allow bridge uppers of DSA conduits, subject to further
3225 * restrictions in dsa_bridge_prechangelower_sanity_check()
3226 */
3227 if (netif_is_bridge_master(info->upper_dev))
3228 return NOTIFY_DONE;
3229
3230 /* Allow LAG uppers, subject to further restrictions in
3231 * dsa_lag_conduit_prechangelower_sanity_check()
3232 */
3233 if (netif_is_lag_master(info->upper_dev))
3234 return dsa_lag_conduit_validate(info->upper_dev, extack);
3235
3236 NL_SET_ERR_MSG_MOD(extack,
3237 "DSA conduit cannot join unknown upper interfaces");
3238 return notifier_from_errno(-EBUSY);
3239 }
3240
3241 static int
3242 dsa_lag_conduit_prechangelower_sanity_check(struct net_device *dev,
3243 struct netdev_notifier_changeupper_info *info)
3244 {
3245 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info);
3246 struct net_device *lag_dev = info->upper_dev;
3247 struct net_device *lower;
3248 struct list_head *iter;
3249
3250 if (!netdev_uses_dsa(lag_dev) || !netif_is_lag_master(lag_dev))
3251 return NOTIFY_DONE;
3252
3253 if (!info->linking)
3254 return NOTIFY_DONE;
3255
3256 if (!netdev_uses_dsa(dev)) {
3257 NL_SET_ERR_MSG(extack,
3258 "Only DSA conduits can join a LAG DSA conduit");
3259 return notifier_from_errno(-EINVAL);
3260 }
3261
3262 netdev_for_each_lower_dev(lag_dev, lower, iter) {
3263 if (!dsa_port_tree_same(dev->dsa_ptr, lower->dsa_ptr)) {
3264 NL_SET_ERR_MSG(extack,
3265 "Interface is DSA conduit for a different switch tree than this LAG");
3266 return notifier_from_errno(-EINVAL);
3267 }
3268
3269 break;
3270 }
3271
3272 return NOTIFY_DONE;
3273 }
3274
3275 /* Don't allow bridging of DSA conduits, since the bridge layer rx_handler
3276 * prevents the DSA fake ethertype handler to be invoked, so we don't get the
3277 * chance to strip off and parse the DSA switch tag protocol header (the bridge
3278 * layer just returns RX_HANDLER_CONSUMED, stopping RX processing for these
3279 * frames).
3280 * The only case where that would not be an issue is when bridging can already
3281 * be offloaded, such as when the DSA conduit is itself a DSA or plain switchdev
3282 * port, and is bridged only with other ports from the same hardware device.
3283 */
3284 static int
3285 dsa_bridge_prechangelower_sanity_check(struct net_device *new_lower,
3286 struct netdev_notifier_changeupper_info *info)
3287 {
3288 struct net_device *br = info->upper_dev;
3289 struct netlink_ext_ack *extack;
3290 struct net_device *lower;
3291 struct list_head *iter;
3292
3293 if (!netif_is_bridge_master(br))
3294 return NOTIFY_DONE;
3295
3296 if (!info->linking)
3297 return NOTIFY_DONE;
3298
3299 extack = netdev_notifier_info_to_extack(&info->info);
3300
3301 netdev_for_each_lower_dev(br, lower, iter) {
3302 if (!netdev_uses_dsa(new_lower) && !netdev_uses_dsa(lower))
3303 continue;
3304
3305 if (!netdev_port_same_parent_id(lower, new_lower)) {
3306 NL_SET_ERR_MSG(extack,
3307 "Cannot do software bridging with a DSA conduit");
3308 return notifier_from_errno(-EINVAL);
3309 }
3310 }
3311
3312 return NOTIFY_DONE;
3313 }
3314
3315 static void dsa_tree_migrate_ports_from_lag_conduit(struct dsa_switch_tree *dst,
3316 struct net_device *lag_dev)
3317 {
3318 struct net_device *new_conduit = dsa_tree_find_first_conduit(dst);
3319 struct dsa_port *dp;
3320 int err;
3321
3322 dsa_tree_for_each_user_port(dp, dst) {
3323 if (dsa_port_to_conduit(dp) != lag_dev)
3324 continue;
3325
3326 err = dsa_user_change_conduit(dp->user, new_conduit, NULL);
3327 if (err) {
3328 netdev_err(dp->user,
3329 "failed to restore conduit to %s: %pe\n",
3330 new_conduit->name, ERR_PTR(err));
3331 }
3332 }
3333 }
3334
3335 static int dsa_conduit_lag_join(struct net_device *conduit,
3336 struct net_device *lag_dev,
3337 struct netdev_lag_upper_info *uinfo,
3338 struct netlink_ext_ack *extack)
3339 {
3340 struct dsa_port *cpu_dp = conduit->dsa_ptr;
3341 struct dsa_switch_tree *dst = cpu_dp->dst;
3342 struct dsa_port *dp;
3343 int err;
3344
3345 err = dsa_conduit_lag_setup(lag_dev, cpu_dp, uinfo, extack);
3346 if (err)
3347 return err;
3348
3349 dsa_tree_for_each_user_port(dp, dst) {
3350 if (dsa_port_to_conduit(dp) != conduit)
3351 continue;
3352
3353 err = dsa_user_change_conduit(dp->user, lag_dev, extack);
3354 if (err)
3355 goto restore;
3356 }
3357
3358 return 0;
3359
3360 restore:
3361 dsa_tree_for_each_user_port_continue_reverse(dp, dst) {
3362 if (dsa_port_to_conduit(dp) != lag_dev)
3363 continue;
3364
3365 err = dsa_user_change_conduit(dp->user, conduit, NULL);
3366 if (err) {
3367 netdev_err(dp->user,
3368 "failed to restore conduit to %s: %pe\n",
3369 conduit->name, ERR_PTR(err));
3370 }
3371 }
3372
3373 dsa_conduit_lag_teardown(lag_dev, conduit->dsa_ptr);
3374
3375 return err;
3376 }
3377
3378 static void dsa_conduit_lag_leave(struct net_device *conduit,
3379 struct net_device *lag_dev)
3380 {
3381 struct dsa_port *dp, *cpu_dp = lag_dev->dsa_ptr;
3382 struct dsa_switch_tree *dst = cpu_dp->dst;
3383 struct dsa_port *new_cpu_dp = NULL;
3384 struct net_device *lower;
3385 struct list_head *iter;
3386
3387 netdev_for_each_lower_dev(lag_dev, lower, iter) {
3388 if (netdev_uses_dsa(lower)) {
3389 new_cpu_dp = lower->dsa_ptr;
3390 break;
3391 }
3392 }
3393
3394 if (new_cpu_dp) {
3395 /* Update the CPU port of the user ports still under the LAG
3396 * so that dsa_port_to_conduit() continues to work properly
3397 */
3398 dsa_tree_for_each_user_port(dp, dst)
3399 if (dsa_port_to_conduit(dp) == lag_dev)
3400 dp->cpu_dp = new_cpu_dp;
3401
3402 /* Update the index of the virtual CPU port to match the lowest
3403 * physical CPU port
3404 */
3405 lag_dev->dsa_ptr = new_cpu_dp;
3406 wmb();
3407 } else {
3408 /* If the LAG DSA conduit has no ports left, migrate back all
3409 * user ports to the first physical CPU port
3410 */
3411 dsa_tree_migrate_ports_from_lag_conduit(dst, lag_dev);
3412 }
3413
3414 /* This DSA conduit has left its LAG in any case, so let
3415 * the CPU port leave the hardware LAG as well
3416 */
3417 dsa_conduit_lag_teardown(lag_dev, conduit->dsa_ptr);
3418 }
3419
3420 static int dsa_conduit_changeupper(struct net_device *dev,
3421 struct netdev_notifier_changeupper_info *info)
3422 {
3423 struct netlink_ext_ack *extack;
3424 int err = NOTIFY_DONE;
3425
3426 if (!netdev_uses_dsa(dev))
3427 return err;
3428
3429 extack = netdev_notifier_info_to_extack(&info->info);
3430
3431 if (netif_is_lag_master(info->upper_dev)) {
3432 if (info->linking) {
3433 err = dsa_conduit_lag_join(dev, info->upper_dev,
3434 info->upper_info, extack);
3435 err = notifier_from_errno(err);
3436 } else {
3437 dsa_conduit_lag_leave(dev, info->upper_dev);
3438 err = NOTIFY_OK;
3439 }
3440 }
3441
3442 return err;
3443 }
3444
3445 static int dsa_user_netdevice_event(struct notifier_block *nb,
3446 unsigned long event, void *ptr)
3447 {
3448 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3449
3450 switch (event) {
3451 case NETDEV_PRECHANGEUPPER: {
3452 struct netdev_notifier_changeupper_info *info = ptr;
3453 int err;
3454
3455 err = dsa_user_prechangeupper_sanity_check(dev, info);
3456 if (notifier_to_errno(err))
3457 return err;
3458
3459 err = dsa_conduit_prechangeupper_sanity_check(dev, info);
3460 if (notifier_to_errno(err))
3461 return err;
3462
3463 err = dsa_lag_conduit_prechangelower_sanity_check(dev, info);
3464 if (notifier_to_errno(err))
3465 return err;
3466
3467 err = dsa_bridge_prechangelower_sanity_check(dev, info);
3468 if (notifier_to_errno(err))
3469 return err;
3470
3471 err = dsa_user_prechangeupper(dev, ptr);
3472 if (notifier_to_errno(err))
3473 return err;
3474
3475 err = dsa_user_lag_prechangeupper(dev, ptr);
3476 if (notifier_to_errno(err))
3477 return err;
3478
3479 break;
3480 }
3481 case NETDEV_CHANGEUPPER: {
3482 int err;
3483
3484 err = dsa_user_changeupper(dev, ptr);
3485 if (notifier_to_errno(err))
3486 return err;
3487
3488 err = dsa_user_lag_changeupper(dev, ptr);
3489 if (notifier_to_errno(err))
3490 return err;
3491
3492 err = dsa_conduit_changeupper(dev, ptr);
3493 if (notifier_to_errno(err))
3494 return err;
3495
3496 break;
3497 }
3498 case NETDEV_CHANGELOWERSTATE: {
3499 struct netdev_notifier_changelowerstate_info *info = ptr;
3500 struct dsa_port *dp;
3501 int err = 0;
3502
3503 if (dsa_user_dev_check(dev)) {
3504 dp = dsa_user_to_port(dev);
3505
3506 err = dsa_port_lag_change(dp, info->lower_state_info);
3507 }
3508
3509 /* Mirror LAG port events on DSA conduits that are in
3510 * a LAG towards their respective switch CPU ports
3511 */
3512 if (netdev_uses_dsa(dev)) {
3513 dp = dev->dsa_ptr;
3514
3515 err = dsa_port_lag_change(dp, info->lower_state_info);
3516 }
3517
3518 return notifier_from_errno(err);
3519 }
3520 case NETDEV_CHANGE:
3521 case NETDEV_UP: {
3522 /* Track state of conduit port.
3523 * DSA driver may require the conduit port (and indirectly
3524 * the tagger) to be available for some special operation.
3525 */
3526 if (netdev_uses_dsa(dev)) {
3527 struct dsa_port *cpu_dp = dev->dsa_ptr;
3528 struct dsa_switch_tree *dst = cpu_dp->ds->dst;
3529
3530 /* Track when the conduit port is UP */
3531 dsa_tree_conduit_oper_state_change(dst, dev,
3532 netif_oper_up(dev));
3533
3534 /* Track when the conduit port is ready and can accept
3535 * packet.
3536 * NETDEV_UP event is not enough to flag a port as ready.
3537 * We also have to wait for linkwatch_do_dev to dev_activate
3538 * and emit a NETDEV_CHANGE event.
3539 * We check if a conduit port is ready by checking if the dev
3540 * have a qdisc assigned and is not noop.
3541 */
3542 dsa_tree_conduit_admin_state_change(dst, dev,
3543 !qdisc_tx_is_noop(dev));
3544
3545 return NOTIFY_OK;
3546 }
3547
3548 return NOTIFY_DONE;
3549 }
3550 case NETDEV_GOING_DOWN: {
3551 struct dsa_port *dp, *cpu_dp;
3552 struct dsa_switch_tree *dst;
3553 LIST_HEAD(close_list);
3554
3555 if (!netdev_uses_dsa(dev))
3556 return NOTIFY_DONE;
3557
3558 cpu_dp = dev->dsa_ptr;
3559 dst = cpu_dp->ds->dst;
3560
3561 dsa_tree_conduit_admin_state_change(dst, dev, false);
3562
3563 list_for_each_entry(dp, &dst->ports, list) {
3564 if (!dsa_port_is_user(dp))
3565 continue;
3566
3567 if (dp->cpu_dp != cpu_dp)
3568 continue;
3569
3570 list_add(&dp->user->close_list, &close_list);
3571 }
3572
3573 dev_close_many(&close_list, true);
3574
3575 return NOTIFY_OK;
3576 }
3577 default:
3578 break;
3579 }
3580
3581 return NOTIFY_DONE;
3582 }
3583
3584 static void
3585 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work)
3586 {
3587 struct switchdev_notifier_fdb_info info = {};
3588
3589 info.addr = switchdev_work->addr;
3590 info.vid = switchdev_work->vid;
3591 info.offloaded = true;
3592 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
3593 switchdev_work->orig_dev, &info.info, NULL);
3594 }
3595
3596 static void dsa_user_switchdev_event_work(struct work_struct *work)
3597 {
3598 struct dsa_switchdev_event_work *switchdev_work =
3599 container_of(work, struct dsa_switchdev_event_work, work);
3600 const unsigned char *addr = switchdev_work->addr;
3601 struct net_device *dev = switchdev_work->dev;
3602 u16 vid = switchdev_work->vid;
3603 struct dsa_switch *ds;
3604 struct dsa_port *dp;
3605 int err;
3606
3607 dp = dsa_user_to_port(dev);
3608 ds = dp->ds;
3609
3610 switch (switchdev_work->event) {
3611 case SWITCHDEV_FDB_ADD_TO_DEVICE:
3612 if (switchdev_work->host_addr)
3613 err = dsa_port_bridge_host_fdb_add(dp, addr, vid);
3614 else if (dp->lag)
3615 err = dsa_port_lag_fdb_add(dp, addr, vid);
3616 else
3617 err = dsa_port_fdb_add(dp, addr, vid);
3618 if (err) {
3619 dev_err(ds->dev,
3620 "port %d failed to add %pM vid %d to fdb: %d\n",
3621 dp->index, addr, vid, err);
3622 break;
3623 }
3624 dsa_fdb_offload_notify(switchdev_work);
3625 break;
3626
3627 case SWITCHDEV_FDB_DEL_TO_DEVICE:
3628 if (switchdev_work->host_addr)
3629 err = dsa_port_bridge_host_fdb_del(dp, addr, vid);
3630 else if (dp->lag)
3631 err = dsa_port_lag_fdb_del(dp, addr, vid);
3632 else
3633 err = dsa_port_fdb_del(dp, addr, vid);
3634 if (err) {
3635 dev_err(ds->dev,
3636 "port %d failed to delete %pM vid %d from fdb: %d\n",
3637 dp->index, addr, vid, err);
3638 }
3639
3640 break;
3641 }
3642
3643 kfree(switchdev_work);
3644 }
3645
3646 static bool dsa_foreign_dev_check(const struct net_device *dev,
3647 const struct net_device *foreign_dev)
3648 {
3649 const struct dsa_port *dp = dsa_user_to_port(dev);
3650 struct dsa_switch_tree *dst = dp->ds->dst;
3651
3652 if (netif_is_bridge_master(foreign_dev))
3653 return !dsa_tree_offloads_bridge_dev(dst, foreign_dev);
3654
3655 if (netif_is_bridge_port(foreign_dev))
3656 return !dsa_tree_offloads_bridge_port(dst, foreign_dev);
3657
3658 /* Everything else is foreign */
3659 return true;
3660 }
3661
3662 static int dsa_user_fdb_event(struct net_device *dev,
3663 struct net_device *orig_dev,
3664 unsigned long event, const void *ctx,
3665 const struct switchdev_notifier_fdb_info *fdb_info)
3666 {
3667 struct dsa_switchdev_event_work *switchdev_work;
3668 struct dsa_port *dp = dsa_user_to_port(dev);
3669 bool host_addr = fdb_info->is_local;
3670 struct dsa_switch *ds = dp->ds;
3671
3672 if (ctx && ctx != dp)
3673 return 0;
3674
3675 if (!dp->bridge)
3676 return 0;
3677
3678 if (switchdev_fdb_is_dynamically_learned(fdb_info)) {
3679 if (dsa_port_offloads_bridge_port(dp, orig_dev))
3680 return 0;
3681
3682 /* FDB entries learned by the software bridge or by foreign
3683 * bridge ports should be installed as host addresses only if
3684 * the driver requests assisted learning.
3685 */
3686 if (!ds->assisted_learning_on_cpu_port)
3687 return 0;
3688 }
3689
3690 /* Also treat FDB entries on foreign interfaces bridged with us as host
3691 * addresses.
3692 */
3693 if (dsa_foreign_dev_check(dev, orig_dev))
3694 host_addr = true;
3695
3696 /* Check early that we're not doing work in vain.
3697 * Host addresses on LAG ports still require regular FDB ops,
3698 * since the CPU port isn't in a LAG.
3699 */
3700 if (dp->lag && !host_addr) {
3701 if (!ds->ops->lag_fdb_add || !ds->ops->lag_fdb_del)
3702 return -EOPNOTSUPP;
3703 } else {
3704 if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del)
3705 return -EOPNOTSUPP;
3706 }
3707
3708 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
3709 if (!switchdev_work)
3710 return -ENOMEM;
3711
3712 netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n",
3713 event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting",
3714 orig_dev->name, fdb_info->addr, fdb_info->vid,
3715 host_addr ? " as host address" : "");
3716
3717 INIT_WORK(&switchdev_work->work, dsa_user_switchdev_event_work);
3718 switchdev_work->event = event;
3719 switchdev_work->dev = dev;
3720 switchdev_work->orig_dev = orig_dev;
3721
3722 ether_addr_copy(switchdev_work->addr, fdb_info->addr);
3723 switchdev_work->vid = fdb_info->vid;
3724 switchdev_work->host_addr = host_addr;
3725
3726 dsa_schedule_work(&switchdev_work->work);
3727
3728 return 0;
3729 }
3730
3731 /* Called under rcu_read_lock() */
3732 static int dsa_user_switchdev_event(struct notifier_block *unused,
3733 unsigned long event, void *ptr)
3734 {
3735 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
3736 int err;
3737
3738 switch (event) {
3739 case SWITCHDEV_PORT_ATTR_SET:
3740 err = switchdev_handle_port_attr_set(dev, ptr,
3741 dsa_user_dev_check,
3742 dsa_user_port_attr_set);
3743 return notifier_from_errno(err);
3744 case SWITCHDEV_FDB_ADD_TO_DEVICE:
3745 case SWITCHDEV_FDB_DEL_TO_DEVICE:
3746 err = switchdev_handle_fdb_event_to_device(dev, event, ptr,
3747 dsa_user_dev_check,
3748 dsa_foreign_dev_check,
3749 dsa_user_fdb_event);
3750 return notifier_from_errno(err);
3751 default:
3752 return NOTIFY_DONE;
3753 }
3754
3755 return NOTIFY_OK;
3756 }
3757
3758 static int dsa_user_switchdev_blocking_event(struct notifier_block *unused,
3759 unsigned long event, void *ptr)
3760 {
3761 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
3762 int err;
3763
3764 switch (event) {
3765 case SWITCHDEV_PORT_OBJ_ADD:
3766 err = switchdev_handle_port_obj_add_foreign(dev, ptr,
3767 dsa_user_dev_check,
3768 dsa_foreign_dev_check,
3769 dsa_user_port_obj_add);
3770 return notifier_from_errno(err);
3771 case SWITCHDEV_PORT_OBJ_DEL:
3772 err = switchdev_handle_port_obj_del_foreign(dev, ptr,
3773 dsa_user_dev_check,
3774 dsa_foreign_dev_check,
3775 dsa_user_port_obj_del);
3776 return notifier_from_errno(err);
3777 case SWITCHDEV_PORT_ATTR_SET:
3778 err = switchdev_handle_port_attr_set(dev, ptr,
3779 dsa_user_dev_check,
3780 dsa_user_port_attr_set);
3781 return notifier_from_errno(err);
3782 }
3783
3784 return NOTIFY_DONE;
3785 }
3786
3787 static struct notifier_block dsa_user_nb __read_mostly = {
3788 .notifier_call = dsa_user_netdevice_event,
3789 };
3790
3791 struct notifier_block dsa_user_switchdev_notifier = {
3792 .notifier_call = dsa_user_switchdev_event,
3793 };
3794
3795 struct notifier_block dsa_user_switchdev_blocking_notifier = {
3796 .notifier_call = dsa_user_switchdev_blocking_event,
3797 };
3798
3799 int dsa_user_register_notifier(void)
3800 {
3801 struct notifier_block *nb;
3802 int err;
3803
3804 err = register_netdevice_notifier(&dsa_user_nb);
3805 if (err)
3806 return err;
3807
3808 err = register_switchdev_notifier(&dsa_user_switchdev_notifier);
3809 if (err)
3810 goto err_switchdev_nb;
3811
3812 nb = &dsa_user_switchdev_blocking_notifier;
3813 err = register_switchdev_blocking_notifier(nb);
3814 if (err)
3815 goto err_switchdev_blocking_nb;
3816
3817 return 0;
3818
3819 err_switchdev_blocking_nb:
3820 unregister_switchdev_notifier(&dsa_user_switchdev_notifier);
3821 err_switchdev_nb:
3822 unregister_netdevice_notifier(&dsa_user_nb);
3823 return err;
3824 }
3825
3826 void dsa_user_unregister_notifier(void)
3827 {
3828 struct notifier_block *nb;
3829 int err;
3830
3831 nb = &dsa_user_switchdev_blocking_notifier;
3832 err = unregister_switchdev_blocking_notifier(nb);
3833 if (err)
3834 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
3835
3836 err = unregister_switchdev_notifier(&dsa_user_switchdev_notifier);
3837 if (err)
3838 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
3839
3840 err = unregister_netdevice_notifier(&dsa_user_nb);
3841 if (err)
3842 pr_err("DSA: failed to unregister user notifier (%d)\n", err);
3843 }
Kernel DRM miscellaneous fixes and cross-tree changes