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net: dsa: don't disable multicast flooding to the CPU even without an IGMP querier
[mirror_ubuntu-jammy-kernel.git] / net / dsa / slave.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * net/dsa/slave.c - Slave 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 <linux/netpoll.h>
23
24 #include "dsa_priv.h"
25
26 /* slave mii_bus handling ***************************************************/
27 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
28 {
29 struct dsa_switch *ds = bus->priv;
30
31 if (ds->phys_mii_mask & (1 << addr))
32 return ds->ops->phy_read(ds, addr, reg);
33
34 return 0xffff;
35 }
36
37 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
38 {
39 struct dsa_switch *ds = bus->priv;
40
41 if (ds->phys_mii_mask & (1 << addr))
42 return ds->ops->phy_write(ds, addr, reg, val);
43
44 return 0;
45 }
46
47 void dsa_slave_mii_bus_init(struct dsa_switch *ds)
48 {
49 ds->slave_mii_bus->priv = (void *)ds;
50 ds->slave_mii_bus->name = "dsa slave smi";
51 ds->slave_mii_bus->read = dsa_slave_phy_read;
52 ds->slave_mii_bus->write = dsa_slave_phy_write;
53 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
54 ds->dst->index, ds->index);
55 ds->slave_mii_bus->parent = ds->dev;
56 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
57 }
58
59
60 /* slave device handling ****************************************************/
61 static int dsa_slave_get_iflink(const struct net_device *dev)
62 {
63 return dsa_slave_to_master(dev)->ifindex;
64 }
65
66 static int dsa_slave_open(struct net_device *dev)
67 {
68 struct net_device *master = dsa_slave_to_master(dev);
69 struct dsa_port *dp = dsa_slave_to_port(dev);
70 int err;
71
72 err = dev_open(master, NULL);
73 if (err < 0) {
74 netdev_err(dev, "failed to open master %s\n", master->name);
75 goto out;
76 }
77
78 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
79 err = dev_uc_add(master, dev->dev_addr);
80 if (err < 0)
81 goto out;
82 }
83
84 if (dev->flags & IFF_ALLMULTI) {
85 err = dev_set_allmulti(master, 1);
86 if (err < 0)
87 goto del_unicast;
88 }
89 if (dev->flags & IFF_PROMISC) {
90 err = dev_set_promiscuity(master, 1);
91 if (err < 0)
92 goto clear_allmulti;
93 }
94
95 err = dsa_port_enable_rt(dp, dev->phydev);
96 if (err)
97 goto clear_promisc;
98
99 return 0;
100
101 clear_promisc:
102 if (dev->flags & IFF_PROMISC)
103 dev_set_promiscuity(master, -1);
104 clear_allmulti:
105 if (dev->flags & IFF_ALLMULTI)
106 dev_set_allmulti(master, -1);
107 del_unicast:
108 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
109 dev_uc_del(master, dev->dev_addr);
110 out:
111 return err;
112 }
113
114 static int dsa_slave_close(struct net_device *dev)
115 {
116 struct net_device *master = dsa_slave_to_master(dev);
117 struct dsa_port *dp = dsa_slave_to_port(dev);
118
119 dsa_port_disable_rt(dp);
120
121 dev_mc_unsync(master, dev);
122 dev_uc_unsync(master, dev);
123 if (dev->flags & IFF_ALLMULTI)
124 dev_set_allmulti(master, -1);
125 if (dev->flags & IFF_PROMISC)
126 dev_set_promiscuity(master, -1);
127
128 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
129 dev_uc_del(master, dev->dev_addr);
130
131 return 0;
132 }
133
134 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
135 {
136 struct net_device *master = dsa_slave_to_master(dev);
137 if (dev->flags & IFF_UP) {
138 if (change & IFF_ALLMULTI)
139 dev_set_allmulti(master,
140 dev->flags & IFF_ALLMULTI ? 1 : -1);
141 if (change & IFF_PROMISC)
142 dev_set_promiscuity(master,
143 dev->flags & IFF_PROMISC ? 1 : -1);
144 }
145 }
146
147 static void dsa_slave_set_rx_mode(struct net_device *dev)
148 {
149 struct net_device *master = dsa_slave_to_master(dev);
150
151 dev_mc_sync(master, dev);
152 dev_uc_sync(master, dev);
153 }
154
155 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
156 {
157 struct net_device *master = dsa_slave_to_master(dev);
158 struct sockaddr *addr = a;
159 int err;
160
161 if (!is_valid_ether_addr(addr->sa_data))
162 return -EADDRNOTAVAIL;
163
164 if (!(dev->flags & IFF_UP))
165 goto out;
166
167 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
168 err = dev_uc_add(master, addr->sa_data);
169 if (err < 0)
170 return err;
171 }
172
173 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
174 dev_uc_del(master, dev->dev_addr);
175
176 out:
177 ether_addr_copy(dev->dev_addr, addr->sa_data);
178
179 return 0;
180 }
181
182 struct dsa_slave_dump_ctx {
183 struct net_device *dev;
184 struct sk_buff *skb;
185 struct netlink_callback *cb;
186 int idx;
187 };
188
189 static int
190 dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid,
191 bool is_static, void *data)
192 {
193 struct dsa_slave_dump_ctx *dump = data;
194 u32 portid = NETLINK_CB(dump->cb->skb).portid;
195 u32 seq = dump->cb->nlh->nlmsg_seq;
196 struct nlmsghdr *nlh;
197 struct ndmsg *ndm;
198
199 if (dump->idx < dump->cb->args[2])
200 goto skip;
201
202 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
203 sizeof(*ndm), NLM_F_MULTI);
204 if (!nlh)
205 return -EMSGSIZE;
206
207 ndm = nlmsg_data(nlh);
208 ndm->ndm_family = AF_BRIDGE;
209 ndm->ndm_pad1 = 0;
210 ndm->ndm_pad2 = 0;
211 ndm->ndm_flags = NTF_SELF;
212 ndm->ndm_type = 0;
213 ndm->ndm_ifindex = dump->dev->ifindex;
214 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
215
216 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
217 goto nla_put_failure;
218
219 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
220 goto nla_put_failure;
221
222 nlmsg_end(dump->skb, nlh);
223
224 skip:
225 dump->idx++;
226 return 0;
227
228 nla_put_failure:
229 nlmsg_cancel(dump->skb, nlh);
230 return -EMSGSIZE;
231 }
232
233 static int
234 dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
235 struct net_device *dev, struct net_device *filter_dev,
236 int *idx)
237 {
238 struct dsa_port *dp = dsa_slave_to_port(dev);
239 struct dsa_slave_dump_ctx dump = {
240 .dev = dev,
241 .skb = skb,
242 .cb = cb,
243 .idx = *idx,
244 };
245 int err;
246
247 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump);
248 *idx = dump.idx;
249
250 return err;
251 }
252
253 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
254 {
255 struct dsa_slave_priv *p = netdev_priv(dev);
256 struct dsa_switch *ds = p->dp->ds;
257 int port = p->dp->index;
258
259 /* Pass through to switch driver if it supports timestamping */
260 switch (cmd) {
261 case SIOCGHWTSTAMP:
262 if (ds->ops->port_hwtstamp_get)
263 return ds->ops->port_hwtstamp_get(ds, port, ifr);
264 break;
265 case SIOCSHWTSTAMP:
266 if (ds->ops->port_hwtstamp_set)
267 return ds->ops->port_hwtstamp_set(ds, port, ifr);
268 break;
269 }
270
271 return phylink_mii_ioctl(p->dp->pl, ifr, cmd);
272 }
273
274 static int dsa_slave_port_attr_set(struct net_device *dev, const void *ctx,
275 const struct switchdev_attr *attr,
276 struct netlink_ext_ack *extack)
277 {
278 struct dsa_port *dp = dsa_slave_to_port(dev);
279 int ret;
280
281 if (ctx && ctx != dp)
282 return 0;
283
284 switch (attr->id) {
285 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
286 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
287 return -EOPNOTSUPP;
288
289 ret = dsa_port_set_state(dp, attr->u.stp_state);
290 break;
291 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
292 if (!dsa_port_offloads_bridge(dp, attr->orig_dev))
293 return -EOPNOTSUPP;
294
295 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
296 extack);
297 break;
298 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
299 if (!dsa_port_offloads_bridge(dp, attr->orig_dev))
300 return -EOPNOTSUPP;
301
302 ret = dsa_port_ageing_time(dp, attr->u.ageing_time);
303 break;
304 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
305 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
306 return -EOPNOTSUPP;
307
308 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags,
309 extack);
310 break;
311 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
312 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
313 return -EOPNOTSUPP;
314
315 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack);
316 break;
317 default:
318 ret = -EOPNOTSUPP;
319 break;
320 }
321
322 return ret;
323 }
324
325 /* Must be called under rcu_read_lock() */
326 static int
327 dsa_slave_vlan_check_for_8021q_uppers(struct net_device *slave,
328 const struct switchdev_obj_port_vlan *vlan)
329 {
330 struct net_device *upper_dev;
331 struct list_head *iter;
332
333 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) {
334 u16 vid;
335
336 if (!is_vlan_dev(upper_dev))
337 continue;
338
339 vid = vlan_dev_vlan_id(upper_dev);
340 if (vid == vlan->vid)
341 return -EBUSY;
342 }
343
344 return 0;
345 }
346
347 static int dsa_slave_vlan_add(struct net_device *dev,
348 const struct switchdev_obj *obj,
349 struct netlink_ext_ack *extack)
350 {
351 struct net_device *master = dsa_slave_to_master(dev);
352 struct dsa_port *dp = dsa_slave_to_port(dev);
353 struct switchdev_obj_port_vlan vlan;
354 int err;
355
356 if (dsa_port_skip_vlan_configuration(dp)) {
357 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN");
358 return 0;
359 }
360
361 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj);
362
363 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with
364 * the same VID.
365 */
366 if (br_vlan_enabled(dp->bridge_dev)) {
367 rcu_read_lock();
368 err = dsa_slave_vlan_check_for_8021q_uppers(dev, &vlan);
369 rcu_read_unlock();
370 if (err) {
371 NL_SET_ERR_MSG_MOD(extack,
372 "Port already has a VLAN upper with this VID");
373 return err;
374 }
375 }
376
377 err = dsa_port_vlan_add(dp, &vlan, extack);
378 if (err)
379 return err;
380
381 /* We need the dedicated CPU port to be a member of the VLAN as well.
382 * Even though drivers often handle CPU membership in special ways,
383 * it doesn't make sense to program a PVID, so clear this flag.
384 */
385 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID;
386
387 err = dsa_port_vlan_add(dp->cpu_dp, &vlan, extack);
388 if (err)
389 return err;
390
391 return vlan_vid_add(master, htons(ETH_P_8021Q), vlan.vid);
392 }
393
394 static int dsa_slave_port_obj_add(struct net_device *dev, const void *ctx,
395 const struct switchdev_obj *obj,
396 struct netlink_ext_ack *extack)
397 {
398 struct dsa_port *dp = dsa_slave_to_port(dev);
399 int err;
400
401 if (ctx && ctx != dp)
402 return 0;
403
404 switch (obj->id) {
405 case SWITCHDEV_OBJ_ID_PORT_MDB:
406 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
407 return -EOPNOTSUPP;
408
409 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
410 break;
411 case SWITCHDEV_OBJ_ID_HOST_MDB:
412 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
413 return -EOPNOTSUPP;
414
415 err = dsa_port_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
416 break;
417 case SWITCHDEV_OBJ_ID_PORT_VLAN:
418 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
419 return -EOPNOTSUPP;
420
421 err = dsa_slave_vlan_add(dev, obj, extack);
422 break;
423 case SWITCHDEV_OBJ_ID_MRP:
424 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
425 return -EOPNOTSUPP;
426
427 err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj));
428 break;
429 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
430 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
431 return -EOPNOTSUPP;
432
433 err = dsa_port_mrp_add_ring_role(dp,
434 SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
435 break;
436 default:
437 err = -EOPNOTSUPP;
438 break;
439 }
440
441 return err;
442 }
443
444 static int dsa_slave_vlan_del(struct net_device *dev,
445 const struct switchdev_obj *obj)
446 {
447 struct net_device *master = dsa_slave_to_master(dev);
448 struct dsa_port *dp = dsa_slave_to_port(dev);
449 struct switchdev_obj_port_vlan *vlan;
450 int err;
451
452 if (dsa_port_skip_vlan_configuration(dp))
453 return 0;
454
455 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
456
457 /* Do not deprogram the CPU port as it may be shared with other user
458 * ports which can be members of this VLAN as well.
459 */
460 err = dsa_port_vlan_del(dp, vlan);
461 if (err)
462 return err;
463
464 vlan_vid_del(master, htons(ETH_P_8021Q), vlan->vid);
465
466 return 0;
467 }
468
469 static int dsa_slave_port_obj_del(struct net_device *dev, const void *ctx,
470 const struct switchdev_obj *obj)
471 {
472 struct dsa_port *dp = dsa_slave_to_port(dev);
473 int err;
474
475 if (ctx && ctx != dp)
476 return 0;
477
478 switch (obj->id) {
479 case SWITCHDEV_OBJ_ID_PORT_MDB:
480 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
481 return -EOPNOTSUPP;
482
483 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
484 break;
485 case SWITCHDEV_OBJ_ID_HOST_MDB:
486 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
487 return -EOPNOTSUPP;
488
489 err = dsa_port_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
490 break;
491 case SWITCHDEV_OBJ_ID_PORT_VLAN:
492 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
493 return -EOPNOTSUPP;
494
495 err = dsa_slave_vlan_del(dev, obj);
496 break;
497 case SWITCHDEV_OBJ_ID_MRP:
498 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
499 return -EOPNOTSUPP;
500
501 err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj));
502 break;
503 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
504 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
505 return -EOPNOTSUPP;
506
507 err = dsa_port_mrp_del_ring_role(dp,
508 SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
509 break;
510 default:
511 err = -EOPNOTSUPP;
512 break;
513 }
514
515 return err;
516 }
517
518 static int dsa_slave_get_port_parent_id(struct net_device *dev,
519 struct netdev_phys_item_id *ppid)
520 {
521 struct dsa_port *dp = dsa_slave_to_port(dev);
522 struct dsa_switch *ds = dp->ds;
523 struct dsa_switch_tree *dst = ds->dst;
524
525 /* For non-legacy ports, devlink is used and it takes
526 * care of the name generation. This ndo implementation
527 * should be removed with legacy support.
528 */
529 if (dp->ds->devlink)
530 return -EOPNOTSUPP;
531
532 ppid->id_len = sizeof(dst->index);
533 memcpy(&ppid->id, &dst->index, ppid->id_len);
534
535 return 0;
536 }
537
538 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
539 struct sk_buff *skb)
540 {
541 #ifdef CONFIG_NET_POLL_CONTROLLER
542 struct dsa_slave_priv *p = netdev_priv(dev);
543
544 return netpoll_send_skb(p->netpoll, skb);
545 #else
546 BUG();
547 return NETDEV_TX_OK;
548 #endif
549 }
550
551 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
552 struct sk_buff *skb)
553 {
554 struct dsa_switch *ds = p->dp->ds;
555
556 if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))
557 return;
558
559 if (!ds->ops->port_txtstamp)
560 return;
561
562 ds->ops->port_txtstamp(ds, p->dp->index, skb);
563 }
564
565 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
566 {
567 /* SKB for netpoll still need to be mangled with the protocol-specific
568 * tag to be successfully transmitted
569 */
570 if (unlikely(netpoll_tx_running(dev)))
571 return dsa_slave_netpoll_send_skb(dev, skb);
572
573 /* Queue the SKB for transmission on the parent interface, but
574 * do not modify its EtherType
575 */
576 skb->dev = dsa_slave_to_master(dev);
577 dev_queue_xmit(skb);
578
579 return NETDEV_TX_OK;
580 }
581 EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
582
583 static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev)
584 {
585 int needed_headroom = dev->needed_headroom;
586 int needed_tailroom = dev->needed_tailroom;
587
588 /* For tail taggers, we need to pad short frames ourselves, to ensure
589 * that the tail tag does not fail at its role of being at the end of
590 * the packet, once the master interface pads the frame. Account for
591 * that pad length here, and pad later.
592 */
593 if (unlikely(needed_tailroom && skb->len < ETH_ZLEN))
594 needed_tailroom += ETH_ZLEN - skb->len;
595 /* skb_headroom() returns unsigned int... */
596 needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0);
597 needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0);
598
599 if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb)))
600 /* No reallocation needed, yay! */
601 return 0;
602
603 return pskb_expand_head(skb, needed_headroom, needed_tailroom,
604 GFP_ATOMIC);
605 }
606
607 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
608 {
609 struct dsa_slave_priv *p = netdev_priv(dev);
610 struct sk_buff *nskb;
611
612 dev_sw_netstats_tx_add(dev, 1, skb->len);
613
614 memset(skb->cb, 0, sizeof(skb->cb));
615
616 /* Handle tx timestamp if any */
617 dsa_skb_tx_timestamp(p, skb);
618
619 if (dsa_realloc_skb(skb, dev)) {
620 dev_kfree_skb_any(skb);
621 return NETDEV_TX_OK;
622 }
623
624 /* needed_tailroom should still be 'warm' in the cache line from
625 * dsa_realloc_skb(), which has also ensured that padding is safe.
626 */
627 if (dev->needed_tailroom)
628 eth_skb_pad(skb);
629
630 /* Transmit function may have to reallocate the original SKB,
631 * in which case it must have freed it. Only free it here on error.
632 */
633 nskb = p->xmit(skb, dev);
634 if (!nskb) {
635 kfree_skb(skb);
636 return NETDEV_TX_OK;
637 }
638
639 return dsa_enqueue_skb(nskb, dev);
640 }
641
642 /* ethtool operations *******************************************************/
643
644 static void dsa_slave_get_drvinfo(struct net_device *dev,
645 struct ethtool_drvinfo *drvinfo)
646 {
647 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
648 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
649 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
650 }
651
652 static int dsa_slave_get_regs_len(struct net_device *dev)
653 {
654 struct dsa_port *dp = dsa_slave_to_port(dev);
655 struct dsa_switch *ds = dp->ds;
656
657 if (ds->ops->get_regs_len)
658 return ds->ops->get_regs_len(ds, dp->index);
659
660 return -EOPNOTSUPP;
661 }
662
663 static void
664 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
665 {
666 struct dsa_port *dp = dsa_slave_to_port(dev);
667 struct dsa_switch *ds = dp->ds;
668
669 if (ds->ops->get_regs)
670 ds->ops->get_regs(ds, dp->index, regs, _p);
671 }
672
673 static int dsa_slave_nway_reset(struct net_device *dev)
674 {
675 struct dsa_port *dp = dsa_slave_to_port(dev);
676
677 return phylink_ethtool_nway_reset(dp->pl);
678 }
679
680 static int dsa_slave_get_eeprom_len(struct net_device *dev)
681 {
682 struct dsa_port *dp = dsa_slave_to_port(dev);
683 struct dsa_switch *ds = dp->ds;
684
685 if (ds->cd && ds->cd->eeprom_len)
686 return ds->cd->eeprom_len;
687
688 if (ds->ops->get_eeprom_len)
689 return ds->ops->get_eeprom_len(ds);
690
691 return 0;
692 }
693
694 static int dsa_slave_get_eeprom(struct net_device *dev,
695 struct ethtool_eeprom *eeprom, u8 *data)
696 {
697 struct dsa_port *dp = dsa_slave_to_port(dev);
698 struct dsa_switch *ds = dp->ds;
699
700 if (ds->ops->get_eeprom)
701 return ds->ops->get_eeprom(ds, eeprom, data);
702
703 return -EOPNOTSUPP;
704 }
705
706 static int dsa_slave_set_eeprom(struct net_device *dev,
707 struct ethtool_eeprom *eeprom, u8 *data)
708 {
709 struct dsa_port *dp = dsa_slave_to_port(dev);
710 struct dsa_switch *ds = dp->ds;
711
712 if (ds->ops->set_eeprom)
713 return ds->ops->set_eeprom(ds, eeprom, data);
714
715 return -EOPNOTSUPP;
716 }
717
718 static void dsa_slave_get_strings(struct net_device *dev,
719 uint32_t stringset, uint8_t *data)
720 {
721 struct dsa_port *dp = dsa_slave_to_port(dev);
722 struct dsa_switch *ds = dp->ds;
723
724 if (stringset == ETH_SS_STATS) {
725 int len = ETH_GSTRING_LEN;
726
727 strncpy(data, "tx_packets", len);
728 strncpy(data + len, "tx_bytes", len);
729 strncpy(data + 2 * len, "rx_packets", len);
730 strncpy(data + 3 * len, "rx_bytes", len);
731 if (ds->ops->get_strings)
732 ds->ops->get_strings(ds, dp->index, stringset,
733 data + 4 * len);
734 } else if (stringset == ETH_SS_TEST) {
735 net_selftest_get_strings(data);
736 }
737
738 }
739
740 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
741 struct ethtool_stats *stats,
742 uint64_t *data)
743 {
744 struct dsa_port *dp = dsa_slave_to_port(dev);
745 struct dsa_switch *ds = dp->ds;
746 struct pcpu_sw_netstats *s;
747 unsigned int start;
748 int i;
749
750 for_each_possible_cpu(i) {
751 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
752
753 s = per_cpu_ptr(dev->tstats, i);
754 do {
755 start = u64_stats_fetch_begin_irq(&s->syncp);
756 tx_packets = s->tx_packets;
757 tx_bytes = s->tx_bytes;
758 rx_packets = s->rx_packets;
759 rx_bytes = s->rx_bytes;
760 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
761 data[0] += tx_packets;
762 data[1] += tx_bytes;
763 data[2] += rx_packets;
764 data[3] += rx_bytes;
765 }
766 if (ds->ops->get_ethtool_stats)
767 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
768 }
769
770 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
771 {
772 struct dsa_port *dp = dsa_slave_to_port(dev);
773 struct dsa_switch *ds = dp->ds;
774
775 if (sset == ETH_SS_STATS) {
776 int count = 0;
777
778 if (ds->ops->get_sset_count) {
779 count = ds->ops->get_sset_count(ds, dp->index, sset);
780 if (count < 0)
781 return count;
782 }
783
784 return count + 4;
785 } else if (sset == ETH_SS_TEST) {
786 return net_selftest_get_count();
787 }
788
789 return -EOPNOTSUPP;
790 }
791
792 static void dsa_slave_net_selftest(struct net_device *ndev,
793 struct ethtool_test *etest, u64 *buf)
794 {
795 struct dsa_port *dp = dsa_slave_to_port(ndev);
796 struct dsa_switch *ds = dp->ds;
797
798 if (ds->ops->self_test) {
799 ds->ops->self_test(ds, dp->index, etest, buf);
800 return;
801 }
802
803 net_selftest(ndev, etest, buf);
804 }
805
806 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
807 {
808 struct dsa_port *dp = dsa_slave_to_port(dev);
809 struct dsa_switch *ds = dp->ds;
810
811 phylink_ethtool_get_wol(dp->pl, w);
812
813 if (ds->ops->get_wol)
814 ds->ops->get_wol(ds, dp->index, w);
815 }
816
817 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
818 {
819 struct dsa_port *dp = dsa_slave_to_port(dev);
820 struct dsa_switch *ds = dp->ds;
821 int ret = -EOPNOTSUPP;
822
823 phylink_ethtool_set_wol(dp->pl, w);
824
825 if (ds->ops->set_wol)
826 ret = ds->ops->set_wol(ds, dp->index, w);
827
828 return ret;
829 }
830
831 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
832 {
833 struct dsa_port *dp = dsa_slave_to_port(dev);
834 struct dsa_switch *ds = dp->ds;
835 int ret;
836
837 /* Port's PHY and MAC both need to be EEE capable */
838 if (!dev->phydev || !dp->pl)
839 return -ENODEV;
840
841 if (!ds->ops->set_mac_eee)
842 return -EOPNOTSUPP;
843
844 ret = ds->ops->set_mac_eee(ds, dp->index, e);
845 if (ret)
846 return ret;
847
848 return phylink_ethtool_set_eee(dp->pl, e);
849 }
850
851 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
852 {
853 struct dsa_port *dp = dsa_slave_to_port(dev);
854 struct dsa_switch *ds = dp->ds;
855 int ret;
856
857 /* Port's PHY and MAC both need to be EEE capable */
858 if (!dev->phydev || !dp->pl)
859 return -ENODEV;
860
861 if (!ds->ops->get_mac_eee)
862 return -EOPNOTSUPP;
863
864 ret = ds->ops->get_mac_eee(ds, dp->index, e);
865 if (ret)
866 return ret;
867
868 return phylink_ethtool_get_eee(dp->pl, e);
869 }
870
871 static int dsa_slave_get_link_ksettings(struct net_device *dev,
872 struct ethtool_link_ksettings *cmd)
873 {
874 struct dsa_port *dp = dsa_slave_to_port(dev);
875
876 return phylink_ethtool_ksettings_get(dp->pl, cmd);
877 }
878
879 static int dsa_slave_set_link_ksettings(struct net_device *dev,
880 const struct ethtool_link_ksettings *cmd)
881 {
882 struct dsa_port *dp = dsa_slave_to_port(dev);
883
884 return phylink_ethtool_ksettings_set(dp->pl, cmd);
885 }
886
887 static void dsa_slave_get_pauseparam(struct net_device *dev,
888 struct ethtool_pauseparam *pause)
889 {
890 struct dsa_port *dp = dsa_slave_to_port(dev);
891
892 phylink_ethtool_get_pauseparam(dp->pl, pause);
893 }
894
895 static int dsa_slave_set_pauseparam(struct net_device *dev,
896 struct ethtool_pauseparam *pause)
897 {
898 struct dsa_port *dp = dsa_slave_to_port(dev);
899
900 return phylink_ethtool_set_pauseparam(dp->pl, pause);
901 }
902
903 #ifdef CONFIG_NET_POLL_CONTROLLER
904 static int dsa_slave_netpoll_setup(struct net_device *dev,
905 struct netpoll_info *ni)
906 {
907 struct net_device *master = dsa_slave_to_master(dev);
908 struct dsa_slave_priv *p = netdev_priv(dev);
909 struct netpoll *netpoll;
910 int err = 0;
911
912 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
913 if (!netpoll)
914 return -ENOMEM;
915
916 err = __netpoll_setup(netpoll, master);
917 if (err) {
918 kfree(netpoll);
919 goto out;
920 }
921
922 p->netpoll = netpoll;
923 out:
924 return err;
925 }
926
927 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
928 {
929 struct dsa_slave_priv *p = netdev_priv(dev);
930 struct netpoll *netpoll = p->netpoll;
931
932 if (!netpoll)
933 return;
934
935 p->netpoll = NULL;
936
937 __netpoll_free(netpoll);
938 }
939
940 static void dsa_slave_poll_controller(struct net_device *dev)
941 {
942 }
943 #endif
944
945 static int dsa_slave_get_phys_port_name(struct net_device *dev,
946 char *name, size_t len)
947 {
948 struct dsa_port *dp = dsa_slave_to_port(dev);
949
950 /* For non-legacy ports, devlink is used and it takes
951 * care of the name generation. This ndo implementation
952 * should be removed with legacy support.
953 */
954 if (dp->ds->devlink)
955 return -EOPNOTSUPP;
956
957 if (snprintf(name, len, "p%d", dp->index) >= len)
958 return -EINVAL;
959
960 return 0;
961 }
962
963 static struct dsa_mall_tc_entry *
964 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
965 {
966 struct dsa_slave_priv *p = netdev_priv(dev);
967 struct dsa_mall_tc_entry *mall_tc_entry;
968
969 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
970 if (mall_tc_entry->cookie == cookie)
971 return mall_tc_entry;
972
973 return NULL;
974 }
975
976 static int
977 dsa_slave_add_cls_matchall_mirred(struct net_device *dev,
978 struct tc_cls_matchall_offload *cls,
979 bool ingress)
980 {
981 struct dsa_port *dp = dsa_slave_to_port(dev);
982 struct dsa_slave_priv *p = netdev_priv(dev);
983 struct dsa_mall_mirror_tc_entry *mirror;
984 struct dsa_mall_tc_entry *mall_tc_entry;
985 struct dsa_switch *ds = dp->ds;
986 struct flow_action_entry *act;
987 struct dsa_port *to_dp;
988 int err;
989
990 if (!ds->ops->port_mirror_add)
991 return -EOPNOTSUPP;
992
993 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
994 cls->common.extack))
995 return -EOPNOTSUPP;
996
997 act = &cls->rule->action.entries[0];
998
999 if (!act->dev)
1000 return -EINVAL;
1001
1002 if (!dsa_slave_dev_check(act->dev))
1003 return -EOPNOTSUPP;
1004
1005 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1006 if (!mall_tc_entry)
1007 return -ENOMEM;
1008
1009 mall_tc_entry->cookie = cls->cookie;
1010 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
1011 mirror = &mall_tc_entry->mirror;
1012
1013 to_dp = dsa_slave_to_port(act->dev);
1014
1015 mirror->to_local_port = to_dp->index;
1016 mirror->ingress = ingress;
1017
1018 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
1019 if (err) {
1020 kfree(mall_tc_entry);
1021 return err;
1022 }
1023
1024 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
1025
1026 return err;
1027 }
1028
1029 static int
1030 dsa_slave_add_cls_matchall_police(struct net_device *dev,
1031 struct tc_cls_matchall_offload *cls,
1032 bool ingress)
1033 {
1034 struct netlink_ext_ack *extack = cls->common.extack;
1035 struct dsa_port *dp = dsa_slave_to_port(dev);
1036 struct dsa_slave_priv *p = netdev_priv(dev);
1037 struct dsa_mall_policer_tc_entry *policer;
1038 struct dsa_mall_tc_entry *mall_tc_entry;
1039 struct dsa_switch *ds = dp->ds;
1040 struct flow_action_entry *act;
1041 int err;
1042
1043 if (!ds->ops->port_policer_add) {
1044 NL_SET_ERR_MSG_MOD(extack,
1045 "Policing offload not implemented");
1046 return -EOPNOTSUPP;
1047 }
1048
1049 if (!ingress) {
1050 NL_SET_ERR_MSG_MOD(extack,
1051 "Only supported on ingress qdisc");
1052 return -EOPNOTSUPP;
1053 }
1054
1055 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
1056 cls->common.extack))
1057 return -EOPNOTSUPP;
1058
1059 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) {
1060 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) {
1061 NL_SET_ERR_MSG_MOD(extack,
1062 "Only one port policer allowed");
1063 return -EEXIST;
1064 }
1065 }
1066
1067 act = &cls->rule->action.entries[0];
1068
1069 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1070 if (!mall_tc_entry)
1071 return -ENOMEM;
1072
1073 mall_tc_entry->cookie = cls->cookie;
1074 mall_tc_entry->type = DSA_PORT_MALL_POLICER;
1075 policer = &mall_tc_entry->policer;
1076 policer->rate_bytes_per_sec = act->police.rate_bytes_ps;
1077 policer->burst = act->police.burst;
1078
1079 err = ds->ops->port_policer_add(ds, dp->index, policer);
1080 if (err) {
1081 kfree(mall_tc_entry);
1082 return err;
1083 }
1084
1085 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
1086
1087 return err;
1088 }
1089
1090 static int dsa_slave_add_cls_matchall(struct net_device *dev,
1091 struct tc_cls_matchall_offload *cls,
1092 bool ingress)
1093 {
1094 int err = -EOPNOTSUPP;
1095
1096 if (cls->common.protocol == htons(ETH_P_ALL) &&
1097 flow_offload_has_one_action(&cls->rule->action) &&
1098 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED)
1099 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress);
1100 else if (flow_offload_has_one_action(&cls->rule->action) &&
1101 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE)
1102 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress);
1103
1104 return err;
1105 }
1106
1107 static void dsa_slave_del_cls_matchall(struct net_device *dev,
1108 struct tc_cls_matchall_offload *cls)
1109 {
1110 struct dsa_port *dp = dsa_slave_to_port(dev);
1111 struct dsa_mall_tc_entry *mall_tc_entry;
1112 struct dsa_switch *ds = dp->ds;
1113
1114 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
1115 if (!mall_tc_entry)
1116 return;
1117
1118 list_del(&mall_tc_entry->list);
1119
1120 switch (mall_tc_entry->type) {
1121 case DSA_PORT_MALL_MIRROR:
1122 if (ds->ops->port_mirror_del)
1123 ds->ops->port_mirror_del(ds, dp->index,
1124 &mall_tc_entry->mirror);
1125 break;
1126 case DSA_PORT_MALL_POLICER:
1127 if (ds->ops->port_policer_del)
1128 ds->ops->port_policer_del(ds, dp->index);
1129 break;
1130 default:
1131 WARN_ON(1);
1132 }
1133
1134 kfree(mall_tc_entry);
1135 }
1136
1137 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
1138 struct tc_cls_matchall_offload *cls,
1139 bool ingress)
1140 {
1141 if (cls->common.chain_index)
1142 return -EOPNOTSUPP;
1143
1144 switch (cls->command) {
1145 case TC_CLSMATCHALL_REPLACE:
1146 return dsa_slave_add_cls_matchall(dev, cls, ingress);
1147 case TC_CLSMATCHALL_DESTROY:
1148 dsa_slave_del_cls_matchall(dev, cls);
1149 return 0;
1150 default:
1151 return -EOPNOTSUPP;
1152 }
1153 }
1154
1155 static int dsa_slave_add_cls_flower(struct net_device *dev,
1156 struct flow_cls_offload *cls,
1157 bool ingress)
1158 {
1159 struct dsa_port *dp = dsa_slave_to_port(dev);
1160 struct dsa_switch *ds = dp->ds;
1161 int port = dp->index;
1162
1163 if (!ds->ops->cls_flower_add)
1164 return -EOPNOTSUPP;
1165
1166 return ds->ops->cls_flower_add(ds, port, cls, ingress);
1167 }
1168
1169 static int dsa_slave_del_cls_flower(struct net_device *dev,
1170 struct flow_cls_offload *cls,
1171 bool ingress)
1172 {
1173 struct dsa_port *dp = dsa_slave_to_port(dev);
1174 struct dsa_switch *ds = dp->ds;
1175 int port = dp->index;
1176
1177 if (!ds->ops->cls_flower_del)
1178 return -EOPNOTSUPP;
1179
1180 return ds->ops->cls_flower_del(ds, port, cls, ingress);
1181 }
1182
1183 static int dsa_slave_stats_cls_flower(struct net_device *dev,
1184 struct flow_cls_offload *cls,
1185 bool ingress)
1186 {
1187 struct dsa_port *dp = dsa_slave_to_port(dev);
1188 struct dsa_switch *ds = dp->ds;
1189 int port = dp->index;
1190
1191 if (!ds->ops->cls_flower_stats)
1192 return -EOPNOTSUPP;
1193
1194 return ds->ops->cls_flower_stats(ds, port, cls, ingress);
1195 }
1196
1197 static int dsa_slave_setup_tc_cls_flower(struct net_device *dev,
1198 struct flow_cls_offload *cls,
1199 bool ingress)
1200 {
1201 switch (cls->command) {
1202 case FLOW_CLS_REPLACE:
1203 return dsa_slave_add_cls_flower(dev, cls, ingress);
1204 case FLOW_CLS_DESTROY:
1205 return dsa_slave_del_cls_flower(dev, cls, ingress);
1206 case FLOW_CLS_STATS:
1207 return dsa_slave_stats_cls_flower(dev, cls, ingress);
1208 default:
1209 return -EOPNOTSUPP;
1210 }
1211 }
1212
1213 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
1214 void *cb_priv, bool ingress)
1215 {
1216 struct net_device *dev = cb_priv;
1217
1218 if (!tc_can_offload(dev))
1219 return -EOPNOTSUPP;
1220
1221 switch (type) {
1222 case TC_SETUP_CLSMATCHALL:
1223 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
1224 case TC_SETUP_CLSFLOWER:
1225 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress);
1226 default:
1227 return -EOPNOTSUPP;
1228 }
1229 }
1230
1231 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
1232 void *type_data, void *cb_priv)
1233 {
1234 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
1235 }
1236
1237 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
1238 void *type_data, void *cb_priv)
1239 {
1240 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
1241 }
1242
1243 static LIST_HEAD(dsa_slave_block_cb_list);
1244
1245 static int dsa_slave_setup_tc_block(struct net_device *dev,
1246 struct flow_block_offload *f)
1247 {
1248 struct flow_block_cb *block_cb;
1249 flow_setup_cb_t *cb;
1250
1251 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
1252 cb = dsa_slave_setup_tc_block_cb_ig;
1253 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
1254 cb = dsa_slave_setup_tc_block_cb_eg;
1255 else
1256 return -EOPNOTSUPP;
1257
1258 f->driver_block_list = &dsa_slave_block_cb_list;
1259
1260 switch (f->command) {
1261 case FLOW_BLOCK_BIND:
1262 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list))
1263 return -EBUSY;
1264
1265 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL);
1266 if (IS_ERR(block_cb))
1267 return PTR_ERR(block_cb);
1268
1269 flow_block_cb_add(block_cb, f);
1270 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list);
1271 return 0;
1272 case FLOW_BLOCK_UNBIND:
1273 block_cb = flow_block_cb_lookup(f->block, cb, dev);
1274 if (!block_cb)
1275 return -ENOENT;
1276
1277 flow_block_cb_remove(block_cb, f);
1278 list_del(&block_cb->driver_list);
1279 return 0;
1280 default:
1281 return -EOPNOTSUPP;
1282 }
1283 }
1284
1285 static int dsa_slave_setup_ft_block(struct dsa_switch *ds, int port,
1286 void *type_data)
1287 {
1288 struct dsa_port *cpu_dp = dsa_to_port(ds, port)->cpu_dp;
1289 struct net_device *master = cpu_dp->master;
1290
1291 if (!master->netdev_ops->ndo_setup_tc)
1292 return -EOPNOTSUPP;
1293
1294 return master->netdev_ops->ndo_setup_tc(master, TC_SETUP_FT, type_data);
1295 }
1296
1297 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
1298 void *type_data)
1299 {
1300 struct dsa_port *dp = dsa_slave_to_port(dev);
1301 struct dsa_switch *ds = dp->ds;
1302
1303 switch (type) {
1304 case TC_SETUP_BLOCK:
1305 return dsa_slave_setup_tc_block(dev, type_data);
1306 case TC_SETUP_FT:
1307 return dsa_slave_setup_ft_block(ds, dp->index, type_data);
1308 default:
1309 break;
1310 }
1311
1312 if (!ds->ops->port_setup_tc)
1313 return -EOPNOTSUPP;
1314
1315 return ds->ops->port_setup_tc(ds, dp->index, type, type_data);
1316 }
1317
1318 static int dsa_slave_get_rxnfc(struct net_device *dev,
1319 struct ethtool_rxnfc *nfc, u32 *rule_locs)
1320 {
1321 struct dsa_port *dp = dsa_slave_to_port(dev);
1322 struct dsa_switch *ds = dp->ds;
1323
1324 if (!ds->ops->get_rxnfc)
1325 return -EOPNOTSUPP;
1326
1327 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
1328 }
1329
1330 static int dsa_slave_set_rxnfc(struct net_device *dev,
1331 struct ethtool_rxnfc *nfc)
1332 {
1333 struct dsa_port *dp = dsa_slave_to_port(dev);
1334 struct dsa_switch *ds = dp->ds;
1335
1336 if (!ds->ops->set_rxnfc)
1337 return -EOPNOTSUPP;
1338
1339 return ds->ops->set_rxnfc(ds, dp->index, nfc);
1340 }
1341
1342 static int dsa_slave_get_ts_info(struct net_device *dev,
1343 struct ethtool_ts_info *ts)
1344 {
1345 struct dsa_slave_priv *p = netdev_priv(dev);
1346 struct dsa_switch *ds = p->dp->ds;
1347
1348 if (!ds->ops->get_ts_info)
1349 return -EOPNOTSUPP;
1350
1351 return ds->ops->get_ts_info(ds, p->dp->index, ts);
1352 }
1353
1354 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
1355 u16 vid)
1356 {
1357 struct net_device *master = dsa_slave_to_master(dev);
1358 struct dsa_port *dp = dsa_slave_to_port(dev);
1359 struct switchdev_obj_port_vlan vlan = {
1360 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
1361 .vid = vid,
1362 /* This API only allows programming tagged, non-PVID VIDs */
1363 .flags = 0,
1364 };
1365 struct netlink_ext_ack extack = {0};
1366 int ret;
1367
1368 /* User port... */
1369 ret = dsa_port_vlan_add(dp, &vlan, &extack);
1370 if (ret) {
1371 if (extack._msg)
1372 netdev_err(dev, "%s\n", extack._msg);
1373 return ret;
1374 }
1375
1376 /* And CPU port... */
1377 ret = dsa_port_vlan_add(dp->cpu_dp, &vlan, &extack);
1378 if (ret) {
1379 if (extack._msg)
1380 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index,
1381 extack._msg);
1382 return ret;
1383 }
1384
1385 return vlan_vid_add(master, proto, vid);
1386 }
1387
1388 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
1389 u16 vid)
1390 {
1391 struct net_device *master = dsa_slave_to_master(dev);
1392 struct dsa_port *dp = dsa_slave_to_port(dev);
1393 struct switchdev_obj_port_vlan vlan = {
1394 .vid = vid,
1395 /* This API only allows programming tagged, non-PVID VIDs */
1396 .flags = 0,
1397 };
1398 int err;
1399
1400 /* Do not deprogram the CPU port as it may be shared with other user
1401 * ports which can be members of this VLAN as well.
1402 */
1403 err = dsa_port_vlan_del(dp, &vlan);
1404 if (err)
1405 return err;
1406
1407 vlan_vid_del(master, proto, vid);
1408
1409 return 0;
1410 }
1411
1412 struct dsa_hw_port {
1413 struct list_head list;
1414 struct net_device *dev;
1415 int old_mtu;
1416 };
1417
1418 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu)
1419 {
1420 const struct dsa_hw_port *p;
1421 int err;
1422
1423 list_for_each_entry(p, hw_port_list, list) {
1424 if (p->dev->mtu == mtu)
1425 continue;
1426
1427 err = dev_set_mtu(p->dev, mtu);
1428 if (err)
1429 goto rollback;
1430 }
1431
1432 return 0;
1433
1434 rollback:
1435 list_for_each_entry_continue_reverse(p, hw_port_list, list) {
1436 if (p->dev->mtu == p->old_mtu)
1437 continue;
1438
1439 if (dev_set_mtu(p->dev, p->old_mtu))
1440 netdev_err(p->dev, "Failed to restore MTU\n");
1441 }
1442
1443 return err;
1444 }
1445
1446 static void dsa_hw_port_list_free(struct list_head *hw_port_list)
1447 {
1448 struct dsa_hw_port *p, *n;
1449
1450 list_for_each_entry_safe(p, n, hw_port_list, list)
1451 kfree(p);
1452 }
1453
1454 /* Make the hardware datapath to/from @dev limited to a common MTU */
1455 static void dsa_bridge_mtu_normalization(struct dsa_port *dp)
1456 {
1457 struct list_head hw_port_list;
1458 struct dsa_switch_tree *dst;
1459 int min_mtu = ETH_MAX_MTU;
1460 struct dsa_port *other_dp;
1461 int err;
1462
1463 if (!dp->ds->mtu_enforcement_ingress)
1464 return;
1465
1466 if (!dp->bridge_dev)
1467 return;
1468
1469 INIT_LIST_HEAD(&hw_port_list);
1470
1471 /* Populate the list of ports that are part of the same bridge
1472 * as the newly added/modified port
1473 */
1474 list_for_each_entry(dst, &dsa_tree_list, list) {
1475 list_for_each_entry(other_dp, &dst->ports, list) {
1476 struct dsa_hw_port *hw_port;
1477 struct net_device *slave;
1478
1479 if (other_dp->type != DSA_PORT_TYPE_USER)
1480 continue;
1481
1482 if (other_dp->bridge_dev != dp->bridge_dev)
1483 continue;
1484
1485 if (!other_dp->ds->mtu_enforcement_ingress)
1486 continue;
1487
1488 slave = other_dp->slave;
1489
1490 if (min_mtu > slave->mtu)
1491 min_mtu = slave->mtu;
1492
1493 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL);
1494 if (!hw_port)
1495 goto out;
1496
1497 hw_port->dev = slave;
1498 hw_port->old_mtu = slave->mtu;
1499
1500 list_add(&hw_port->list, &hw_port_list);
1501 }
1502 }
1503
1504 /* Attempt to configure the entire hardware bridge to the newly added
1505 * interface's MTU first, regardless of whether the intention of the
1506 * user was to raise or lower it.
1507 */
1508 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu);
1509 if (!err)
1510 goto out;
1511
1512 /* Clearly that didn't work out so well, so just set the minimum MTU on
1513 * all hardware bridge ports now. If this fails too, then all ports will
1514 * still have their old MTU rolled back anyway.
1515 */
1516 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu);
1517
1518 out:
1519 dsa_hw_port_list_free(&hw_port_list);
1520 }
1521
1522 int dsa_slave_change_mtu(struct net_device *dev, int new_mtu)
1523 {
1524 struct net_device *master = dsa_slave_to_master(dev);
1525 struct dsa_port *dp = dsa_slave_to_port(dev);
1526 struct dsa_slave_priv *p = netdev_priv(dev);
1527 struct dsa_switch *ds = p->dp->ds;
1528 struct dsa_port *dp_iter;
1529 struct dsa_port *cpu_dp;
1530 int port = p->dp->index;
1531 int largest_mtu = 0;
1532 int new_master_mtu;
1533 int old_master_mtu;
1534 int mtu_limit;
1535 int cpu_mtu;
1536 int err;
1537
1538 if (!ds->ops->port_change_mtu)
1539 return -EOPNOTSUPP;
1540
1541 list_for_each_entry(dp_iter, &ds->dst->ports, list) {
1542 int slave_mtu;
1543
1544 if (!dsa_port_is_user(dp_iter))
1545 continue;
1546
1547 /* During probe, this function will be called for each slave
1548 * device, while not all of them have been allocated. That's
1549 * ok, it doesn't change what the maximum is, so ignore it.
1550 */
1551 if (!dp_iter->slave)
1552 continue;
1553
1554 /* Pretend that we already applied the setting, which we
1555 * actually haven't (still haven't done all integrity checks)
1556 */
1557 if (dp_iter == dp)
1558 slave_mtu = new_mtu;
1559 else
1560 slave_mtu = dp_iter->slave->mtu;
1561
1562 if (largest_mtu < slave_mtu)
1563 largest_mtu = slave_mtu;
1564 }
1565
1566 cpu_dp = dsa_to_port(ds, port)->cpu_dp;
1567
1568 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu);
1569 old_master_mtu = master->mtu;
1570 new_master_mtu = largest_mtu + dsa_tag_protocol_overhead(cpu_dp->tag_ops);
1571 if (new_master_mtu > mtu_limit)
1572 return -ERANGE;
1573
1574 /* If the master MTU isn't over limit, there's no need to check the CPU
1575 * MTU, since that surely isn't either.
1576 */
1577 cpu_mtu = largest_mtu;
1578
1579 /* Start applying stuff */
1580 if (new_master_mtu != old_master_mtu) {
1581 err = dev_set_mtu(master, new_master_mtu);
1582 if (err < 0)
1583 goto out_master_failed;
1584
1585 /* We only need to propagate the MTU of the CPU port to
1586 * upstream switches, so create a non-targeted notifier which
1587 * updates all switches.
1588 */
1589 err = dsa_port_mtu_change(cpu_dp, cpu_mtu, false);
1590 if (err)
1591 goto out_cpu_failed;
1592 }
1593
1594 err = dsa_port_mtu_change(dp, new_mtu, true);
1595 if (err)
1596 goto out_port_failed;
1597
1598 dev->mtu = new_mtu;
1599
1600 dsa_bridge_mtu_normalization(dp);
1601
1602 return 0;
1603
1604 out_port_failed:
1605 if (new_master_mtu != old_master_mtu)
1606 dsa_port_mtu_change(cpu_dp, old_master_mtu -
1607 dsa_tag_protocol_overhead(cpu_dp->tag_ops),
1608 false);
1609 out_cpu_failed:
1610 if (new_master_mtu != old_master_mtu)
1611 dev_set_mtu(master, old_master_mtu);
1612 out_master_failed:
1613 return err;
1614 }
1615
1616 static const struct ethtool_ops dsa_slave_ethtool_ops = {
1617 .get_drvinfo = dsa_slave_get_drvinfo,
1618 .get_regs_len = dsa_slave_get_regs_len,
1619 .get_regs = dsa_slave_get_regs,
1620 .nway_reset = dsa_slave_nway_reset,
1621 .get_link = ethtool_op_get_link,
1622 .get_eeprom_len = dsa_slave_get_eeprom_len,
1623 .get_eeprom = dsa_slave_get_eeprom,
1624 .set_eeprom = dsa_slave_set_eeprom,
1625 .get_strings = dsa_slave_get_strings,
1626 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
1627 .get_sset_count = dsa_slave_get_sset_count,
1628 .set_wol = dsa_slave_set_wol,
1629 .get_wol = dsa_slave_get_wol,
1630 .set_eee = dsa_slave_set_eee,
1631 .get_eee = dsa_slave_get_eee,
1632 .get_link_ksettings = dsa_slave_get_link_ksettings,
1633 .set_link_ksettings = dsa_slave_set_link_ksettings,
1634 .get_pauseparam = dsa_slave_get_pauseparam,
1635 .set_pauseparam = dsa_slave_set_pauseparam,
1636 .get_rxnfc = dsa_slave_get_rxnfc,
1637 .set_rxnfc = dsa_slave_set_rxnfc,
1638 .get_ts_info = dsa_slave_get_ts_info,
1639 .self_test = dsa_slave_net_selftest,
1640 };
1641
1642 static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
1643 {
1644 struct dsa_port *dp = dsa_slave_to_port(dev);
1645
1646 return dp->ds->devlink ? &dp->devlink_port : NULL;
1647 }
1648
1649 static void dsa_slave_get_stats64(struct net_device *dev,
1650 struct rtnl_link_stats64 *s)
1651 {
1652 struct dsa_port *dp = dsa_slave_to_port(dev);
1653 struct dsa_switch *ds = dp->ds;
1654
1655 if (ds->ops->get_stats64)
1656 ds->ops->get_stats64(ds, dp->index, s);
1657 else
1658 dev_get_tstats64(dev, s);
1659 }
1660
1661 static int dsa_slave_fill_forward_path(struct net_device_path_ctx *ctx,
1662 struct net_device_path *path)
1663 {
1664 struct dsa_port *dp = dsa_slave_to_port(ctx->dev);
1665 struct dsa_port *cpu_dp = dp->cpu_dp;
1666
1667 path->dev = ctx->dev;
1668 path->type = DEV_PATH_DSA;
1669 path->dsa.proto = cpu_dp->tag_ops->proto;
1670 path->dsa.port = dp->index;
1671 ctx->dev = cpu_dp->master;
1672
1673 return 0;
1674 }
1675
1676 static const struct net_device_ops dsa_slave_netdev_ops = {
1677 .ndo_open = dsa_slave_open,
1678 .ndo_stop = dsa_slave_close,
1679 .ndo_start_xmit = dsa_slave_xmit,
1680 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
1681 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
1682 .ndo_set_mac_address = dsa_slave_set_mac_address,
1683 .ndo_fdb_dump = dsa_slave_fdb_dump,
1684 .ndo_eth_ioctl = dsa_slave_ioctl,
1685 .ndo_get_iflink = dsa_slave_get_iflink,
1686 #ifdef CONFIG_NET_POLL_CONTROLLER
1687 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
1688 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
1689 .ndo_poll_controller = dsa_slave_poll_controller,
1690 #endif
1691 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
1692 .ndo_setup_tc = dsa_slave_setup_tc,
1693 .ndo_get_stats64 = dsa_slave_get_stats64,
1694 .ndo_get_port_parent_id = dsa_slave_get_port_parent_id,
1695 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
1696 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
1697 .ndo_get_devlink_port = dsa_slave_get_devlink_port,
1698 .ndo_change_mtu = dsa_slave_change_mtu,
1699 .ndo_fill_forward_path = dsa_slave_fill_forward_path,
1700 };
1701
1702 static struct device_type dsa_type = {
1703 .name = "dsa",
1704 };
1705
1706 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
1707 {
1708 const struct dsa_port *dp = dsa_to_port(ds, port);
1709
1710 if (dp->pl)
1711 phylink_mac_change(dp->pl, up);
1712 }
1713 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
1714
1715 static void dsa_slave_phylink_fixed_state(struct phylink_config *config,
1716 struct phylink_link_state *state)
1717 {
1718 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1719 struct dsa_switch *ds = dp->ds;
1720
1721 /* No need to check that this operation is valid, the callback would
1722 * not be called if it was not.
1723 */
1724 ds->ops->phylink_fixed_state(ds, dp->index, state);
1725 }
1726
1727 /* slave device setup *******************************************************/
1728 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr,
1729 u32 flags)
1730 {
1731 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1732 struct dsa_switch *ds = dp->ds;
1733
1734 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
1735 if (!slave_dev->phydev) {
1736 netdev_err(slave_dev, "no phy at %d\n", addr);
1737 return -ENODEV;
1738 }
1739
1740 slave_dev->phydev->dev_flags |= flags;
1741
1742 return phylink_connect_phy(dp->pl, slave_dev->phydev);
1743 }
1744
1745 static int dsa_slave_phy_setup(struct net_device *slave_dev)
1746 {
1747 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1748 struct device_node *port_dn = dp->dn;
1749 struct dsa_switch *ds = dp->ds;
1750 phy_interface_t mode;
1751 u32 phy_flags = 0;
1752 int ret;
1753
1754 ret = of_get_phy_mode(port_dn, &mode);
1755 if (ret)
1756 mode = PHY_INTERFACE_MODE_NA;
1757
1758 dp->pl_config.dev = &slave_dev->dev;
1759 dp->pl_config.type = PHYLINK_NETDEV;
1760
1761 /* The get_fixed_state callback takes precedence over polling the
1762 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set
1763 * this if the switch provides such a callback.
1764 */
1765 if (ds->ops->phylink_fixed_state) {
1766 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state;
1767 dp->pl_config.poll_fixed_state = true;
1768 }
1769
1770 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode,
1771 &dsa_port_phylink_mac_ops);
1772 if (IS_ERR(dp->pl)) {
1773 netdev_err(slave_dev,
1774 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1775 return PTR_ERR(dp->pl);
1776 }
1777
1778 if (ds->ops->get_phy_flags)
1779 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
1780
1781 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
1782 if (ret == -ENODEV && ds->slave_mii_bus) {
1783 /* We could not connect to a designated PHY or SFP, so try to
1784 * use the switch internal MDIO bus instead
1785 */
1786 ret = dsa_slave_phy_connect(slave_dev, dp->index, phy_flags);
1787 if (ret) {
1788 netdev_err(slave_dev,
1789 "failed to connect to port %d: %d\n",
1790 dp->index, ret);
1791 phylink_destroy(dp->pl);
1792 return ret;
1793 }
1794 }
1795
1796 return ret;
1797 }
1798
1799 void dsa_slave_setup_tagger(struct net_device *slave)
1800 {
1801 struct dsa_port *dp = dsa_slave_to_port(slave);
1802 struct dsa_slave_priv *p = netdev_priv(slave);
1803 const struct dsa_port *cpu_dp = dp->cpu_dp;
1804 struct net_device *master = cpu_dp->master;
1805 const struct dsa_switch *ds = dp->ds;
1806
1807 slave->needed_headroom = cpu_dp->tag_ops->needed_headroom;
1808 slave->needed_tailroom = cpu_dp->tag_ops->needed_tailroom;
1809 /* Try to save one extra realloc later in the TX path (in the master)
1810 * by also inheriting the master's needed headroom and tailroom.
1811 * The 8021q driver also does this.
1812 */
1813 slave->needed_headroom += master->needed_headroom;
1814 slave->needed_tailroom += master->needed_tailroom;
1815
1816 p->xmit = cpu_dp->tag_ops->xmit;
1817
1818 slave->features = master->vlan_features | NETIF_F_HW_TC;
1819 if (ds->ops->port_vlan_add && ds->ops->port_vlan_del)
1820 slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1821 slave->hw_features |= NETIF_F_HW_TC;
1822 slave->features |= NETIF_F_LLTX;
1823 if (slave->needed_tailroom)
1824 slave->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST);
1825 }
1826
1827 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1828 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1829 struct netdev_queue *txq,
1830 void *_unused)
1831 {
1832 lockdep_set_class(&txq->_xmit_lock,
1833 &dsa_slave_netdev_xmit_lock_key);
1834 }
1835
1836 int dsa_slave_suspend(struct net_device *slave_dev)
1837 {
1838 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1839
1840 if (!netif_running(slave_dev))
1841 return 0;
1842
1843 netif_device_detach(slave_dev);
1844
1845 rtnl_lock();
1846 phylink_stop(dp->pl);
1847 rtnl_unlock();
1848
1849 return 0;
1850 }
1851
1852 int dsa_slave_resume(struct net_device *slave_dev)
1853 {
1854 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1855
1856 if (!netif_running(slave_dev))
1857 return 0;
1858
1859 netif_device_attach(slave_dev);
1860
1861 rtnl_lock();
1862 phylink_start(dp->pl);
1863 rtnl_unlock();
1864
1865 return 0;
1866 }
1867
1868 int dsa_slave_create(struct dsa_port *port)
1869 {
1870 const struct dsa_port *cpu_dp = port->cpu_dp;
1871 struct net_device *master = cpu_dp->master;
1872 struct dsa_switch *ds = port->ds;
1873 const char *name = port->name;
1874 struct net_device *slave_dev;
1875 struct dsa_slave_priv *p;
1876 int ret;
1877
1878 if (!ds->num_tx_queues)
1879 ds->num_tx_queues = 1;
1880
1881 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
1882 NET_NAME_UNKNOWN, ether_setup,
1883 ds->num_tx_queues, 1);
1884 if (slave_dev == NULL)
1885 return -ENOMEM;
1886
1887 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1888 if (!is_zero_ether_addr(port->mac))
1889 ether_addr_copy(slave_dev->dev_addr, port->mac);
1890 else
1891 eth_hw_addr_inherit(slave_dev, master);
1892 slave_dev->priv_flags |= IFF_NO_QUEUE;
1893 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1894 if (ds->ops->port_max_mtu)
1895 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index);
1896 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1897
1898 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1899 NULL);
1900
1901 SET_NETDEV_DEV(slave_dev, port->ds->dev);
1902 slave_dev->dev.of_node = port->dn;
1903 slave_dev->vlan_features = master->vlan_features;
1904
1905 p = netdev_priv(slave_dev);
1906 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1907 if (!slave_dev->tstats) {
1908 free_netdev(slave_dev);
1909 return -ENOMEM;
1910 }
1911
1912 ret = gro_cells_init(&p->gcells, slave_dev);
1913 if (ret)
1914 goto out_free;
1915
1916 p->dp = port;
1917 INIT_LIST_HEAD(&p->mall_tc_list);
1918 port->slave = slave_dev;
1919 dsa_slave_setup_tagger(slave_dev);
1920
1921 rtnl_lock();
1922 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN);
1923 rtnl_unlock();
1924 if (ret && ret != -EOPNOTSUPP)
1925 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n",
1926 ret, ETH_DATA_LEN, port->index);
1927
1928 netif_carrier_off(slave_dev);
1929
1930 ret = dsa_slave_phy_setup(slave_dev);
1931 if (ret) {
1932 netdev_err(slave_dev,
1933 "error %d setting up PHY for tree %d, switch %d, port %d\n",
1934 ret, ds->dst->index, ds->index, port->index);
1935 goto out_gcells;
1936 }
1937
1938 rtnl_lock();
1939
1940 ret = register_netdevice(slave_dev);
1941 if (ret) {
1942 netdev_err(master, "error %d registering interface %s\n",
1943 ret, slave_dev->name);
1944 rtnl_unlock();
1945 goto out_phy;
1946 }
1947
1948 ret = netdev_upper_dev_link(master, slave_dev, NULL);
1949
1950 rtnl_unlock();
1951
1952 if (ret)
1953 goto out_unregister;
1954
1955 return 0;
1956
1957 out_unregister:
1958 unregister_netdev(slave_dev);
1959 out_phy:
1960 rtnl_lock();
1961 phylink_disconnect_phy(p->dp->pl);
1962 rtnl_unlock();
1963 phylink_destroy(p->dp->pl);
1964 out_gcells:
1965 gro_cells_destroy(&p->gcells);
1966 out_free:
1967 free_percpu(slave_dev->tstats);
1968 free_netdev(slave_dev);
1969 port->slave = NULL;
1970 return ret;
1971 }
1972
1973 void dsa_slave_destroy(struct net_device *slave_dev)
1974 {
1975 struct net_device *master = dsa_slave_to_master(slave_dev);
1976 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1977 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1978
1979 netif_carrier_off(slave_dev);
1980 rtnl_lock();
1981 netdev_upper_dev_unlink(master, slave_dev);
1982 unregister_netdevice(slave_dev);
1983 phylink_disconnect_phy(dp->pl);
1984 rtnl_unlock();
1985
1986 phylink_destroy(dp->pl);
1987 gro_cells_destroy(&p->gcells);
1988 free_percpu(slave_dev->tstats);
1989 free_netdev(slave_dev);
1990 }
1991
1992 bool dsa_slave_dev_check(const struct net_device *dev)
1993 {
1994 return dev->netdev_ops == &dsa_slave_netdev_ops;
1995 }
1996 EXPORT_SYMBOL_GPL(dsa_slave_dev_check);
1997
1998 static int dsa_slave_changeupper(struct net_device *dev,
1999 struct netdev_notifier_changeupper_info *info)
2000 {
2001 struct dsa_port *dp = dsa_slave_to_port(dev);
2002 struct netlink_ext_ack *extack;
2003 int err = NOTIFY_DONE;
2004
2005 extack = netdev_notifier_info_to_extack(&info->info);
2006
2007 if (netif_is_bridge_master(info->upper_dev)) {
2008 if (info->linking) {
2009 err = dsa_port_bridge_join(dp, info->upper_dev, extack);
2010 if (!err)
2011 dsa_bridge_mtu_normalization(dp);
2012 err = notifier_from_errno(err);
2013 } else {
2014 dsa_port_bridge_leave(dp, info->upper_dev);
2015 err = NOTIFY_OK;
2016 }
2017 } else if (netif_is_lag_master(info->upper_dev)) {
2018 if (info->linking) {
2019 err = dsa_port_lag_join(dp, info->upper_dev,
2020 info->upper_info, extack);
2021 if (err == -EOPNOTSUPP) {
2022 NL_SET_ERR_MSG_MOD(info->info.extack,
2023 "Offloading not supported");
2024 err = 0;
2025 }
2026 err = notifier_from_errno(err);
2027 } else {
2028 dsa_port_lag_leave(dp, info->upper_dev);
2029 err = NOTIFY_OK;
2030 }
2031 } else if (is_hsr_master(info->upper_dev)) {
2032 if (info->linking) {
2033 err = dsa_port_hsr_join(dp, info->upper_dev);
2034 if (err == -EOPNOTSUPP) {
2035 NL_SET_ERR_MSG_MOD(info->info.extack,
2036 "Offloading not supported");
2037 err = 0;
2038 }
2039 err = notifier_from_errno(err);
2040 } else {
2041 dsa_port_hsr_leave(dp, info->upper_dev);
2042 err = NOTIFY_OK;
2043 }
2044 }
2045
2046 return err;
2047 }
2048
2049 static int dsa_slave_prechangeupper(struct net_device *dev,
2050 struct netdev_notifier_changeupper_info *info)
2051 {
2052 struct dsa_port *dp = dsa_slave_to_port(dev);
2053
2054 if (netif_is_bridge_master(info->upper_dev) && !info->linking)
2055 dsa_port_pre_bridge_leave(dp, info->upper_dev);
2056 else if (netif_is_lag_master(info->upper_dev) && !info->linking)
2057 dsa_port_pre_lag_leave(dp, info->upper_dev);
2058 /* dsa_port_pre_hsr_leave is not yet necessary since hsr cannot be
2059 * meaningfully enslaved to a bridge yet
2060 */
2061
2062 return NOTIFY_DONE;
2063 }
2064
2065 static int
2066 dsa_slave_lag_changeupper(struct net_device *dev,
2067 struct netdev_notifier_changeupper_info *info)
2068 {
2069 struct net_device *lower;
2070 struct list_head *iter;
2071 int err = NOTIFY_DONE;
2072 struct dsa_port *dp;
2073
2074 netdev_for_each_lower_dev(dev, lower, iter) {
2075 if (!dsa_slave_dev_check(lower))
2076 continue;
2077
2078 dp = dsa_slave_to_port(lower);
2079 if (!dp->lag_dev)
2080 /* Software LAG */
2081 continue;
2082
2083 err = dsa_slave_changeupper(lower, info);
2084 if (notifier_to_errno(err))
2085 break;
2086 }
2087
2088 return err;
2089 }
2090
2091 /* Same as dsa_slave_lag_changeupper() except that it calls
2092 * dsa_slave_prechangeupper()
2093 */
2094 static int
2095 dsa_slave_lag_prechangeupper(struct net_device *dev,
2096 struct netdev_notifier_changeupper_info *info)
2097 {
2098 struct net_device *lower;
2099 struct list_head *iter;
2100 int err = NOTIFY_DONE;
2101 struct dsa_port *dp;
2102
2103 netdev_for_each_lower_dev(dev, lower, iter) {
2104 if (!dsa_slave_dev_check(lower))
2105 continue;
2106
2107 dp = dsa_slave_to_port(lower);
2108 if (!dp->lag_dev)
2109 /* Software LAG */
2110 continue;
2111
2112 err = dsa_slave_prechangeupper(lower, info);
2113 if (notifier_to_errno(err))
2114 break;
2115 }
2116
2117 return err;
2118 }
2119
2120 static int
2121 dsa_prevent_bridging_8021q_upper(struct net_device *dev,
2122 struct netdev_notifier_changeupper_info *info)
2123 {
2124 struct netlink_ext_ack *ext_ack;
2125 struct net_device *slave;
2126 struct dsa_port *dp;
2127
2128 ext_ack = netdev_notifier_info_to_extack(&info->info);
2129
2130 if (!is_vlan_dev(dev))
2131 return NOTIFY_DONE;
2132
2133 slave = vlan_dev_real_dev(dev);
2134 if (!dsa_slave_dev_check(slave))
2135 return NOTIFY_DONE;
2136
2137 dp = dsa_slave_to_port(slave);
2138 if (!dp->bridge_dev)
2139 return NOTIFY_DONE;
2140
2141 /* Deny enslaving a VLAN device into a VLAN-aware bridge */
2142 if (br_vlan_enabled(dp->bridge_dev) &&
2143 netif_is_bridge_master(info->upper_dev) && info->linking) {
2144 NL_SET_ERR_MSG_MOD(ext_ack,
2145 "Cannot enslave VLAN device into VLAN aware bridge");
2146 return notifier_from_errno(-EINVAL);
2147 }
2148
2149 return NOTIFY_DONE;
2150 }
2151
2152 static int
2153 dsa_slave_check_8021q_upper(struct net_device *dev,
2154 struct netdev_notifier_changeupper_info *info)
2155 {
2156 struct dsa_port *dp = dsa_slave_to_port(dev);
2157 struct net_device *br = dp->bridge_dev;
2158 struct bridge_vlan_info br_info;
2159 struct netlink_ext_ack *extack;
2160 int err = NOTIFY_DONE;
2161 u16 vid;
2162
2163 if (!br || !br_vlan_enabled(br))
2164 return NOTIFY_DONE;
2165
2166 extack = netdev_notifier_info_to_extack(&info->info);
2167 vid = vlan_dev_vlan_id(info->upper_dev);
2168
2169 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
2170 * device, respectively the VID is not found, returning
2171 * 0 means success, which is a failure for us here.
2172 */
2173 err = br_vlan_get_info(br, vid, &br_info);
2174 if (err == 0) {
2175 NL_SET_ERR_MSG_MOD(extack,
2176 "This VLAN is already configured by the bridge");
2177 return notifier_from_errno(-EBUSY);
2178 }
2179
2180 return NOTIFY_DONE;
2181 }
2182
2183 static int
2184 dsa_slave_prechangeupper_sanity_check(struct net_device *dev,
2185 struct netdev_notifier_changeupper_info *info)
2186 {
2187 struct dsa_switch *ds;
2188 struct dsa_port *dp;
2189 int err;
2190
2191 if (!dsa_slave_dev_check(dev))
2192 return dsa_prevent_bridging_8021q_upper(dev, info);
2193
2194 dp = dsa_slave_to_port(dev);
2195 ds = dp->ds;
2196
2197 if (ds->ops->port_prechangeupper) {
2198 err = ds->ops->port_prechangeupper(ds, dp->index, info);
2199 if (err)
2200 return notifier_from_errno(err);
2201 }
2202
2203 if (is_vlan_dev(info->upper_dev))
2204 return dsa_slave_check_8021q_upper(dev, info);
2205
2206 return NOTIFY_DONE;
2207 }
2208
2209 static int dsa_slave_netdevice_event(struct notifier_block *nb,
2210 unsigned long event, void *ptr)
2211 {
2212 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2213
2214 switch (event) {
2215 case NETDEV_PRECHANGEUPPER: {
2216 struct netdev_notifier_changeupper_info *info = ptr;
2217 int err;
2218
2219 err = dsa_slave_prechangeupper_sanity_check(dev, info);
2220 if (err != NOTIFY_DONE)
2221 return err;
2222
2223 if (dsa_slave_dev_check(dev))
2224 return dsa_slave_prechangeupper(dev, ptr);
2225
2226 if (netif_is_lag_master(dev))
2227 return dsa_slave_lag_prechangeupper(dev, ptr);
2228
2229 break;
2230 }
2231 case NETDEV_CHANGEUPPER:
2232 if (dsa_slave_dev_check(dev))
2233 return dsa_slave_changeupper(dev, ptr);
2234
2235 if (netif_is_lag_master(dev))
2236 return dsa_slave_lag_changeupper(dev, ptr);
2237
2238 break;
2239 case NETDEV_CHANGELOWERSTATE: {
2240 struct netdev_notifier_changelowerstate_info *info = ptr;
2241 struct dsa_port *dp;
2242 int err;
2243
2244 if (!dsa_slave_dev_check(dev))
2245 break;
2246
2247 dp = dsa_slave_to_port(dev);
2248
2249 err = dsa_port_lag_change(dp, info->lower_state_info);
2250 return notifier_from_errno(err);
2251 }
2252 case NETDEV_GOING_DOWN: {
2253 struct dsa_port *dp, *cpu_dp;
2254 struct dsa_switch_tree *dst;
2255 LIST_HEAD(close_list);
2256
2257 if (!netdev_uses_dsa(dev))
2258 return NOTIFY_DONE;
2259
2260 cpu_dp = dev->dsa_ptr;
2261 dst = cpu_dp->ds->dst;
2262
2263 list_for_each_entry(dp, &dst->ports, list) {
2264 if (!dsa_is_user_port(dp->ds, dp->index))
2265 continue;
2266
2267 list_add(&dp->slave->close_list, &close_list);
2268 }
2269
2270 dev_close_many(&close_list, true);
2271
2272 return NOTIFY_OK;
2273 }
2274 default:
2275 break;
2276 }
2277
2278 return NOTIFY_DONE;
2279 }
2280
2281 static void
2282 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work)
2283 {
2284 struct dsa_switch *ds = switchdev_work->ds;
2285 struct switchdev_notifier_fdb_info info;
2286 struct dsa_port *dp;
2287
2288 if (!dsa_is_user_port(ds, switchdev_work->port))
2289 return;
2290
2291 info.addr = switchdev_work->addr;
2292 info.vid = switchdev_work->vid;
2293 info.offloaded = true;
2294 dp = dsa_to_port(ds, switchdev_work->port);
2295 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
2296 dp->slave, &info.info, NULL);
2297 }
2298
2299 static void dsa_slave_switchdev_event_work(struct work_struct *work)
2300 {
2301 struct dsa_switchdev_event_work *switchdev_work =
2302 container_of(work, struct dsa_switchdev_event_work, work);
2303 struct dsa_switch *ds = switchdev_work->ds;
2304 struct dsa_port *dp;
2305 int err;
2306
2307 dp = dsa_to_port(ds, switchdev_work->port);
2308
2309 rtnl_lock();
2310 switch (switchdev_work->event) {
2311 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2312 if (switchdev_work->host_addr)
2313 err = dsa_port_host_fdb_add(dp, switchdev_work->addr,
2314 switchdev_work->vid);
2315 else
2316 err = dsa_port_fdb_add(dp, switchdev_work->addr,
2317 switchdev_work->vid);
2318 if (err) {
2319 dev_err(ds->dev,
2320 "port %d failed to add %pM vid %d to fdb: %d\n",
2321 dp->index, switchdev_work->addr,
2322 switchdev_work->vid, err);
2323 break;
2324 }
2325 dsa_fdb_offload_notify(switchdev_work);
2326 break;
2327
2328 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2329 if (switchdev_work->host_addr)
2330 err = dsa_port_host_fdb_del(dp, switchdev_work->addr,
2331 switchdev_work->vid);
2332 else
2333 err = dsa_port_fdb_del(dp, switchdev_work->addr,
2334 switchdev_work->vid);
2335 if (err) {
2336 dev_err(ds->dev,
2337 "port %d failed to delete %pM vid %d from fdb: %d\n",
2338 dp->index, switchdev_work->addr,
2339 switchdev_work->vid, err);
2340 }
2341
2342 break;
2343 }
2344 rtnl_unlock();
2345
2346 dev_put(switchdev_work->dev);
2347 kfree(switchdev_work);
2348 }
2349
2350 static bool dsa_foreign_dev_check(const struct net_device *dev,
2351 const struct net_device *foreign_dev)
2352 {
2353 const struct dsa_port *dp = dsa_slave_to_port(dev);
2354 struct dsa_switch_tree *dst = dp->ds->dst;
2355
2356 if (netif_is_bridge_master(foreign_dev))
2357 return !dsa_tree_offloads_bridge(dst, foreign_dev);
2358
2359 if (netif_is_bridge_port(foreign_dev))
2360 return !dsa_tree_offloads_bridge_port(dst, foreign_dev);
2361
2362 /* Everything else is foreign */
2363 return true;
2364 }
2365
2366 static int dsa_slave_fdb_event(struct net_device *dev,
2367 const struct net_device *orig_dev,
2368 const void *ctx,
2369 const struct switchdev_notifier_fdb_info *fdb_info,
2370 unsigned long event)
2371 {
2372 struct dsa_switchdev_event_work *switchdev_work;
2373 struct dsa_port *dp = dsa_slave_to_port(dev);
2374 bool host_addr = fdb_info->is_local;
2375 struct dsa_switch *ds = dp->ds;
2376
2377 if (ctx && ctx != dp)
2378 return 0;
2379
2380 if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del)
2381 return -EOPNOTSUPP;
2382
2383 if (dsa_slave_dev_check(orig_dev) &&
2384 switchdev_fdb_is_dynamically_learned(fdb_info))
2385 return 0;
2386
2387 /* FDB entries learned by the software bridge should be installed as
2388 * host addresses only if the driver requests assisted learning.
2389 */
2390 if (switchdev_fdb_is_dynamically_learned(fdb_info) &&
2391 !ds->assisted_learning_on_cpu_port)
2392 return 0;
2393
2394 /* Also treat FDB entries on foreign interfaces bridged with us as host
2395 * addresses.
2396 */
2397 if (dsa_foreign_dev_check(dev, orig_dev))
2398 host_addr = true;
2399
2400 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2401 if (!switchdev_work)
2402 return -ENOMEM;
2403
2404 netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n",
2405 event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting",
2406 orig_dev->name, fdb_info->addr, fdb_info->vid,
2407 host_addr ? " as host address" : "");
2408
2409 INIT_WORK(&switchdev_work->work, dsa_slave_switchdev_event_work);
2410 switchdev_work->ds = ds;
2411 switchdev_work->port = dp->index;
2412 switchdev_work->event = event;
2413 switchdev_work->dev = dev;
2414
2415 ether_addr_copy(switchdev_work->addr, fdb_info->addr);
2416 switchdev_work->vid = fdb_info->vid;
2417 switchdev_work->host_addr = host_addr;
2418
2419 /* Hold a reference for dsa_fdb_offload_notify */
2420 dev_hold(dev);
2421 dsa_schedule_work(&switchdev_work->work);
2422
2423 return 0;
2424 }
2425
2426 static int
2427 dsa_slave_fdb_add_to_device(struct net_device *dev,
2428 const struct net_device *orig_dev, const void *ctx,
2429 const struct switchdev_notifier_fdb_info *fdb_info)
2430 {
2431 return dsa_slave_fdb_event(dev, orig_dev, ctx, fdb_info,
2432 SWITCHDEV_FDB_ADD_TO_DEVICE);
2433 }
2434
2435 static int
2436 dsa_slave_fdb_del_to_device(struct net_device *dev,
2437 const struct net_device *orig_dev, const void *ctx,
2438 const struct switchdev_notifier_fdb_info *fdb_info)
2439 {
2440 return dsa_slave_fdb_event(dev, orig_dev, ctx, fdb_info,
2441 SWITCHDEV_FDB_DEL_TO_DEVICE);
2442 }
2443
2444 /* Called under rcu_read_lock() */
2445 static int dsa_slave_switchdev_event(struct notifier_block *unused,
2446 unsigned long event, void *ptr)
2447 {
2448 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2449 int err;
2450
2451 switch (event) {
2452 case SWITCHDEV_PORT_ATTR_SET:
2453 err = switchdev_handle_port_attr_set(dev, ptr,
2454 dsa_slave_dev_check,
2455 dsa_slave_port_attr_set);
2456 return notifier_from_errno(err);
2457 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2458 err = switchdev_handle_fdb_add_to_device(dev, ptr,
2459 dsa_slave_dev_check,
2460 dsa_foreign_dev_check,
2461 dsa_slave_fdb_add_to_device,
2462 NULL);
2463 return notifier_from_errno(err);
2464 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2465 err = switchdev_handle_fdb_del_to_device(dev, ptr,
2466 dsa_slave_dev_check,
2467 dsa_foreign_dev_check,
2468 dsa_slave_fdb_del_to_device,
2469 NULL);
2470 return notifier_from_errno(err);
2471 default:
2472 return NOTIFY_DONE;
2473 }
2474
2475 return NOTIFY_OK;
2476 }
2477
2478 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
2479 unsigned long event, void *ptr)
2480 {
2481 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2482 int err;
2483
2484 switch (event) {
2485 case SWITCHDEV_PORT_OBJ_ADD:
2486 err = switchdev_handle_port_obj_add(dev, ptr,
2487 dsa_slave_dev_check,
2488 dsa_slave_port_obj_add);
2489 return notifier_from_errno(err);
2490 case SWITCHDEV_PORT_OBJ_DEL:
2491 err = switchdev_handle_port_obj_del(dev, ptr,
2492 dsa_slave_dev_check,
2493 dsa_slave_port_obj_del);
2494 return notifier_from_errno(err);
2495 case SWITCHDEV_PORT_ATTR_SET:
2496 err = switchdev_handle_port_attr_set(dev, ptr,
2497 dsa_slave_dev_check,
2498 dsa_slave_port_attr_set);
2499 return notifier_from_errno(err);
2500 }
2501
2502 return NOTIFY_DONE;
2503 }
2504
2505 static struct notifier_block dsa_slave_nb __read_mostly = {
2506 .notifier_call = dsa_slave_netdevice_event,
2507 };
2508
2509 struct notifier_block dsa_slave_switchdev_notifier = {
2510 .notifier_call = dsa_slave_switchdev_event,
2511 };
2512
2513 struct notifier_block dsa_slave_switchdev_blocking_notifier = {
2514 .notifier_call = dsa_slave_switchdev_blocking_event,
2515 };
2516
2517 int dsa_slave_register_notifier(void)
2518 {
2519 struct notifier_block *nb;
2520 int err;
2521
2522 err = register_netdevice_notifier(&dsa_slave_nb);
2523 if (err)
2524 return err;
2525
2526 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
2527 if (err)
2528 goto err_switchdev_nb;
2529
2530 nb = &dsa_slave_switchdev_blocking_notifier;
2531 err = register_switchdev_blocking_notifier(nb);
2532 if (err)
2533 goto err_switchdev_blocking_nb;
2534
2535 return 0;
2536
2537 err_switchdev_blocking_nb:
2538 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2539 err_switchdev_nb:
2540 unregister_netdevice_notifier(&dsa_slave_nb);
2541 return err;
2542 }
2543
2544 void dsa_slave_unregister_notifier(void)
2545 {
2546 struct notifier_block *nb;
2547 int err;
2548
2549 nb = &dsa_slave_switchdev_blocking_notifier;
2550 err = unregister_switchdev_blocking_notifier(nb);
2551 if (err)
2552 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
2553
2554 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2555 if (err)
2556 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
2557
2558 err = unregister_netdevice_notifier(&dsa_slave_nb);
2559 if (err)
2560 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
2561 }
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