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