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Merge tag 'linux-kselftest-fixes-5.14-rc6' of git://git.kernel.org/pub/scm/linux...
[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 case SWITCHDEV_ATTR_ID_BRIDGE_MROUTER:
318 if (!dsa_port_offloads_bridge(dp, attr->orig_dev))
319 return -EOPNOTSUPP;
320
321 ret = dsa_port_mrouter(dp->cpu_dp, attr->u.mrouter, extack);
322 break;
323 default:
324 ret = -EOPNOTSUPP;
325 break;
326 }
327
328 return ret;
329 }
330
331 /* Must be called under rcu_read_lock() */
332 static int
333 dsa_slave_vlan_check_for_8021q_uppers(struct net_device *slave,
334 const struct switchdev_obj_port_vlan *vlan)
335 {
336 struct net_device *upper_dev;
337 struct list_head *iter;
338
339 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) {
340 u16 vid;
341
342 if (!is_vlan_dev(upper_dev))
343 continue;
344
345 vid = vlan_dev_vlan_id(upper_dev);
346 if (vid == vlan->vid)
347 return -EBUSY;
348 }
349
350 return 0;
351 }
352
353 static int dsa_slave_vlan_add(struct net_device *dev,
354 const struct switchdev_obj *obj,
355 struct netlink_ext_ack *extack)
356 {
357 struct net_device *master = dsa_slave_to_master(dev);
358 struct dsa_port *dp = dsa_slave_to_port(dev);
359 struct switchdev_obj_port_vlan vlan;
360 int err;
361
362 if (dsa_port_skip_vlan_configuration(dp)) {
363 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN");
364 return 0;
365 }
366
367 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj);
368
369 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with
370 * the same VID.
371 */
372 if (br_vlan_enabled(dp->bridge_dev)) {
373 rcu_read_lock();
374 err = dsa_slave_vlan_check_for_8021q_uppers(dev, &vlan);
375 rcu_read_unlock();
376 if (err) {
377 NL_SET_ERR_MSG_MOD(extack,
378 "Port already has a VLAN upper with this VID");
379 return err;
380 }
381 }
382
383 err = dsa_port_vlan_add(dp, &vlan, extack);
384 if (err)
385 return err;
386
387 /* We need the dedicated CPU port to be a member of the VLAN as well.
388 * Even though drivers often handle CPU membership in special ways,
389 * it doesn't make sense to program a PVID, so clear this flag.
390 */
391 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID;
392
393 err = dsa_port_vlan_add(dp->cpu_dp, &vlan, extack);
394 if (err)
395 return err;
396
397 return vlan_vid_add(master, htons(ETH_P_8021Q), vlan.vid);
398 }
399
400 static int dsa_slave_port_obj_add(struct net_device *dev, const void *ctx,
401 const struct switchdev_obj *obj,
402 struct netlink_ext_ack *extack)
403 {
404 struct dsa_port *dp = dsa_slave_to_port(dev);
405 int err;
406
407 if (ctx && ctx != dp)
408 return 0;
409
410 switch (obj->id) {
411 case SWITCHDEV_OBJ_ID_PORT_MDB:
412 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
413 return -EOPNOTSUPP;
414
415 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
416 break;
417 case SWITCHDEV_OBJ_ID_HOST_MDB:
418 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
419 return -EOPNOTSUPP;
420
421 err = dsa_port_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
422 break;
423 case SWITCHDEV_OBJ_ID_PORT_VLAN:
424 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
425 return -EOPNOTSUPP;
426
427 err = dsa_slave_vlan_add(dev, obj, extack);
428 break;
429 case SWITCHDEV_OBJ_ID_MRP:
430 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
431 return -EOPNOTSUPP;
432
433 err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj));
434 break;
435 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
436 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
437 return -EOPNOTSUPP;
438
439 err = dsa_port_mrp_add_ring_role(dp,
440 SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
441 break;
442 default:
443 err = -EOPNOTSUPP;
444 break;
445 }
446
447 return err;
448 }
449
450 static int dsa_slave_vlan_del(struct net_device *dev,
451 const struct switchdev_obj *obj)
452 {
453 struct net_device *master = dsa_slave_to_master(dev);
454 struct dsa_port *dp = dsa_slave_to_port(dev);
455 struct switchdev_obj_port_vlan *vlan;
456 int err;
457
458 if (dsa_port_skip_vlan_configuration(dp))
459 return 0;
460
461 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
462
463 /* Do not deprogram the CPU port as it may be shared with other user
464 * ports which can be members of this VLAN as well.
465 */
466 err = dsa_port_vlan_del(dp, vlan);
467 if (err)
468 return err;
469
470 vlan_vid_del(master, htons(ETH_P_8021Q), vlan->vid);
471
472 return 0;
473 }
474
475 static int dsa_slave_port_obj_del(struct net_device *dev, const void *ctx,
476 const struct switchdev_obj *obj)
477 {
478 struct dsa_port *dp = dsa_slave_to_port(dev);
479 int err;
480
481 if (ctx && ctx != dp)
482 return 0;
483
484 switch (obj->id) {
485 case SWITCHDEV_OBJ_ID_PORT_MDB:
486 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
487 return -EOPNOTSUPP;
488
489 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
490 break;
491 case SWITCHDEV_OBJ_ID_HOST_MDB:
492 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
493 return -EOPNOTSUPP;
494
495 err = dsa_port_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
496 break;
497 case SWITCHDEV_OBJ_ID_PORT_VLAN:
498 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
499 return -EOPNOTSUPP;
500
501 err = dsa_slave_vlan_del(dev, obj);
502 break;
503 case SWITCHDEV_OBJ_ID_MRP:
504 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
505 return -EOPNOTSUPP;
506
507 err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj));
508 break;
509 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
510 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
511 return -EOPNOTSUPP;
512
513 err = dsa_port_mrp_del_ring_role(dp,
514 SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
515 break;
516 default:
517 err = -EOPNOTSUPP;
518 break;
519 }
520
521 return err;
522 }
523
524 static int dsa_slave_get_port_parent_id(struct net_device *dev,
525 struct netdev_phys_item_id *ppid)
526 {
527 struct dsa_port *dp = dsa_slave_to_port(dev);
528 struct dsa_switch *ds = dp->ds;
529 struct dsa_switch_tree *dst = ds->dst;
530
531 /* For non-legacy ports, devlink is used and it takes
532 * care of the name generation. This ndo implementation
533 * should be removed with legacy support.
534 */
535 if (dp->ds->devlink)
536 return -EOPNOTSUPP;
537
538 ppid->id_len = sizeof(dst->index);
539 memcpy(&ppid->id, &dst->index, ppid->id_len);
540
541 return 0;
542 }
543
544 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
545 struct sk_buff *skb)
546 {
547 #ifdef CONFIG_NET_POLL_CONTROLLER
548 struct dsa_slave_priv *p = netdev_priv(dev);
549
550 return netpoll_send_skb(p->netpoll, skb);
551 #else
552 BUG();
553 return NETDEV_TX_OK;
554 #endif
555 }
556
557 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
558 struct sk_buff *skb)
559 {
560 struct dsa_switch *ds = p->dp->ds;
561
562 if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))
563 return;
564
565 if (!ds->ops->port_txtstamp)
566 return;
567
568 ds->ops->port_txtstamp(ds, p->dp->index, skb);
569 }
570
571 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
572 {
573 /* SKB for netpoll still need to be mangled with the protocol-specific
574 * tag to be successfully transmitted
575 */
576 if (unlikely(netpoll_tx_running(dev)))
577 return dsa_slave_netpoll_send_skb(dev, skb);
578
579 /* Queue the SKB for transmission on the parent interface, but
580 * do not modify its EtherType
581 */
582 skb->dev = dsa_slave_to_master(dev);
583 dev_queue_xmit(skb);
584
585 return NETDEV_TX_OK;
586 }
587 EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
588
589 static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev)
590 {
591 int needed_headroom = dev->needed_headroom;
592 int needed_tailroom = dev->needed_tailroom;
593
594 /* For tail taggers, we need to pad short frames ourselves, to ensure
595 * that the tail tag does not fail at its role of being at the end of
596 * the packet, once the master interface pads the frame. Account for
597 * that pad length here, and pad later.
598 */
599 if (unlikely(needed_tailroom && skb->len < ETH_ZLEN))
600 needed_tailroom += ETH_ZLEN - skb->len;
601 /* skb_headroom() returns unsigned int... */
602 needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0);
603 needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0);
604
605 if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb)))
606 /* No reallocation needed, yay! */
607 return 0;
608
609 return pskb_expand_head(skb, needed_headroom, needed_tailroom,
610 GFP_ATOMIC);
611 }
612
613 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
614 {
615 struct dsa_slave_priv *p = netdev_priv(dev);
616 struct sk_buff *nskb;
617
618 dev_sw_netstats_tx_add(dev, 1, skb->len);
619
620 memset(skb->cb, 0, sizeof(skb->cb));
621
622 /* Handle tx timestamp if any */
623 dsa_skb_tx_timestamp(p, skb);
624
625 if (dsa_realloc_skb(skb, dev)) {
626 dev_kfree_skb_any(skb);
627 return NETDEV_TX_OK;
628 }
629
630 /* needed_tailroom should still be 'warm' in the cache line from
631 * dsa_realloc_skb(), which has also ensured that padding is safe.
632 */
633 if (dev->needed_tailroom)
634 eth_skb_pad(skb);
635
636 /* Transmit function may have to reallocate the original SKB,
637 * in which case it must have freed it. Only free it here on error.
638 */
639 nskb = p->xmit(skb, dev);
640 if (!nskb) {
641 kfree_skb(skb);
642 return NETDEV_TX_OK;
643 }
644
645 return dsa_enqueue_skb(nskb, dev);
646 }
647
648 /* ethtool operations *******************************************************/
649
650 static void dsa_slave_get_drvinfo(struct net_device *dev,
651 struct ethtool_drvinfo *drvinfo)
652 {
653 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
654 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
655 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
656 }
657
658 static int dsa_slave_get_regs_len(struct net_device *dev)
659 {
660 struct dsa_port *dp = dsa_slave_to_port(dev);
661 struct dsa_switch *ds = dp->ds;
662
663 if (ds->ops->get_regs_len)
664 return ds->ops->get_regs_len(ds, dp->index);
665
666 return -EOPNOTSUPP;
667 }
668
669 static void
670 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
671 {
672 struct dsa_port *dp = dsa_slave_to_port(dev);
673 struct dsa_switch *ds = dp->ds;
674
675 if (ds->ops->get_regs)
676 ds->ops->get_regs(ds, dp->index, regs, _p);
677 }
678
679 static int dsa_slave_nway_reset(struct net_device *dev)
680 {
681 struct dsa_port *dp = dsa_slave_to_port(dev);
682
683 return phylink_ethtool_nway_reset(dp->pl);
684 }
685
686 static int dsa_slave_get_eeprom_len(struct net_device *dev)
687 {
688 struct dsa_port *dp = dsa_slave_to_port(dev);
689 struct dsa_switch *ds = dp->ds;
690
691 if (ds->cd && ds->cd->eeprom_len)
692 return ds->cd->eeprom_len;
693
694 if (ds->ops->get_eeprom_len)
695 return ds->ops->get_eeprom_len(ds);
696
697 return 0;
698 }
699
700 static int dsa_slave_get_eeprom(struct net_device *dev,
701 struct ethtool_eeprom *eeprom, u8 *data)
702 {
703 struct dsa_port *dp = dsa_slave_to_port(dev);
704 struct dsa_switch *ds = dp->ds;
705
706 if (ds->ops->get_eeprom)
707 return ds->ops->get_eeprom(ds, eeprom, data);
708
709 return -EOPNOTSUPP;
710 }
711
712 static int dsa_slave_set_eeprom(struct net_device *dev,
713 struct ethtool_eeprom *eeprom, u8 *data)
714 {
715 struct dsa_port *dp = dsa_slave_to_port(dev);
716 struct dsa_switch *ds = dp->ds;
717
718 if (ds->ops->set_eeprom)
719 return ds->ops->set_eeprom(ds, eeprom, data);
720
721 return -EOPNOTSUPP;
722 }
723
724 static void dsa_slave_get_strings(struct net_device *dev,
725 uint32_t stringset, uint8_t *data)
726 {
727 struct dsa_port *dp = dsa_slave_to_port(dev);
728 struct dsa_switch *ds = dp->ds;
729
730 if (stringset == ETH_SS_STATS) {
731 int len = ETH_GSTRING_LEN;
732
733 strncpy(data, "tx_packets", len);
734 strncpy(data + len, "tx_bytes", len);
735 strncpy(data + 2 * len, "rx_packets", len);
736 strncpy(data + 3 * len, "rx_bytes", len);
737 if (ds->ops->get_strings)
738 ds->ops->get_strings(ds, dp->index, stringset,
739 data + 4 * len);
740 } else if (stringset == ETH_SS_TEST) {
741 net_selftest_get_strings(data);
742 }
743
744 }
745
746 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
747 struct ethtool_stats *stats,
748 uint64_t *data)
749 {
750 struct dsa_port *dp = dsa_slave_to_port(dev);
751 struct dsa_switch *ds = dp->ds;
752 struct pcpu_sw_netstats *s;
753 unsigned int start;
754 int i;
755
756 for_each_possible_cpu(i) {
757 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
758
759 s = per_cpu_ptr(dev->tstats, i);
760 do {
761 start = u64_stats_fetch_begin_irq(&s->syncp);
762 tx_packets = s->tx_packets;
763 tx_bytes = s->tx_bytes;
764 rx_packets = s->rx_packets;
765 rx_bytes = s->rx_bytes;
766 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
767 data[0] += tx_packets;
768 data[1] += tx_bytes;
769 data[2] += rx_packets;
770 data[3] += rx_bytes;
771 }
772 if (ds->ops->get_ethtool_stats)
773 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
774 }
775
776 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
777 {
778 struct dsa_port *dp = dsa_slave_to_port(dev);
779 struct dsa_switch *ds = dp->ds;
780
781 if (sset == ETH_SS_STATS) {
782 int count = 0;
783
784 if (ds->ops->get_sset_count) {
785 count = ds->ops->get_sset_count(ds, dp->index, sset);
786 if (count < 0)
787 return count;
788 }
789
790 return count + 4;
791 } else if (sset == ETH_SS_TEST) {
792 return net_selftest_get_count();
793 }
794
795 return -EOPNOTSUPP;
796 }
797
798 static void dsa_slave_net_selftest(struct net_device *ndev,
799 struct ethtool_test *etest, u64 *buf)
800 {
801 struct dsa_port *dp = dsa_slave_to_port(ndev);
802 struct dsa_switch *ds = dp->ds;
803
804 if (ds->ops->self_test) {
805 ds->ops->self_test(ds, dp->index, etest, buf);
806 return;
807 }
808
809 net_selftest(ndev, etest, buf);
810 }
811
812 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
813 {
814 struct dsa_port *dp = dsa_slave_to_port(dev);
815 struct dsa_switch *ds = dp->ds;
816
817 phylink_ethtool_get_wol(dp->pl, w);
818
819 if (ds->ops->get_wol)
820 ds->ops->get_wol(ds, dp->index, w);
821 }
822
823 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
824 {
825 struct dsa_port *dp = dsa_slave_to_port(dev);
826 struct dsa_switch *ds = dp->ds;
827 int ret = -EOPNOTSUPP;
828
829 phylink_ethtool_set_wol(dp->pl, w);
830
831 if (ds->ops->set_wol)
832 ret = ds->ops->set_wol(ds, dp->index, w);
833
834 return ret;
835 }
836
837 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
838 {
839 struct dsa_port *dp = dsa_slave_to_port(dev);
840 struct dsa_switch *ds = dp->ds;
841 int ret;
842
843 /* Port's PHY and MAC both need to be EEE capable */
844 if (!dev->phydev || !dp->pl)
845 return -ENODEV;
846
847 if (!ds->ops->set_mac_eee)
848 return -EOPNOTSUPP;
849
850 ret = ds->ops->set_mac_eee(ds, dp->index, e);
851 if (ret)
852 return ret;
853
854 return phylink_ethtool_set_eee(dp->pl, e);
855 }
856
857 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
858 {
859 struct dsa_port *dp = dsa_slave_to_port(dev);
860 struct dsa_switch *ds = dp->ds;
861 int ret;
862
863 /* Port's PHY and MAC both need to be EEE capable */
864 if (!dev->phydev || !dp->pl)
865 return -ENODEV;
866
867 if (!ds->ops->get_mac_eee)
868 return -EOPNOTSUPP;
869
870 ret = ds->ops->get_mac_eee(ds, dp->index, e);
871 if (ret)
872 return ret;
873
874 return phylink_ethtool_get_eee(dp->pl, e);
875 }
876
877 static int dsa_slave_get_link_ksettings(struct net_device *dev,
878 struct ethtool_link_ksettings *cmd)
879 {
880 struct dsa_port *dp = dsa_slave_to_port(dev);
881
882 return phylink_ethtool_ksettings_get(dp->pl, cmd);
883 }
884
885 static int dsa_slave_set_link_ksettings(struct net_device *dev,
886 const struct ethtool_link_ksettings *cmd)
887 {
888 struct dsa_port *dp = dsa_slave_to_port(dev);
889
890 return phylink_ethtool_ksettings_set(dp->pl, cmd);
891 }
892
893 static void dsa_slave_get_pauseparam(struct net_device *dev,
894 struct ethtool_pauseparam *pause)
895 {
896 struct dsa_port *dp = dsa_slave_to_port(dev);
897
898 phylink_ethtool_get_pauseparam(dp->pl, pause);
899 }
900
901 static int dsa_slave_set_pauseparam(struct net_device *dev,
902 struct ethtool_pauseparam *pause)
903 {
904 struct dsa_port *dp = dsa_slave_to_port(dev);
905
906 return phylink_ethtool_set_pauseparam(dp->pl, pause);
907 }
908
909 #ifdef CONFIG_NET_POLL_CONTROLLER
910 static int dsa_slave_netpoll_setup(struct net_device *dev,
911 struct netpoll_info *ni)
912 {
913 struct net_device *master = dsa_slave_to_master(dev);
914 struct dsa_slave_priv *p = netdev_priv(dev);
915 struct netpoll *netpoll;
916 int err = 0;
917
918 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
919 if (!netpoll)
920 return -ENOMEM;
921
922 err = __netpoll_setup(netpoll, master);
923 if (err) {
924 kfree(netpoll);
925 goto out;
926 }
927
928 p->netpoll = netpoll;
929 out:
930 return err;
931 }
932
933 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
934 {
935 struct dsa_slave_priv *p = netdev_priv(dev);
936 struct netpoll *netpoll = p->netpoll;
937
938 if (!netpoll)
939 return;
940
941 p->netpoll = NULL;
942
943 __netpoll_free(netpoll);
944 }
945
946 static void dsa_slave_poll_controller(struct net_device *dev)
947 {
948 }
949 #endif
950
951 static int dsa_slave_get_phys_port_name(struct net_device *dev,
952 char *name, size_t len)
953 {
954 struct dsa_port *dp = dsa_slave_to_port(dev);
955
956 /* For non-legacy ports, devlink is used and it takes
957 * care of the name generation. This ndo implementation
958 * should be removed with legacy support.
959 */
960 if (dp->ds->devlink)
961 return -EOPNOTSUPP;
962
963 if (snprintf(name, len, "p%d", dp->index) >= len)
964 return -EINVAL;
965
966 return 0;
967 }
968
969 static struct dsa_mall_tc_entry *
970 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
971 {
972 struct dsa_slave_priv *p = netdev_priv(dev);
973 struct dsa_mall_tc_entry *mall_tc_entry;
974
975 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
976 if (mall_tc_entry->cookie == cookie)
977 return mall_tc_entry;
978
979 return NULL;
980 }
981
982 static int
983 dsa_slave_add_cls_matchall_mirred(struct net_device *dev,
984 struct tc_cls_matchall_offload *cls,
985 bool ingress)
986 {
987 struct dsa_port *dp = dsa_slave_to_port(dev);
988 struct dsa_slave_priv *p = netdev_priv(dev);
989 struct dsa_mall_mirror_tc_entry *mirror;
990 struct dsa_mall_tc_entry *mall_tc_entry;
991 struct dsa_switch *ds = dp->ds;
992 struct flow_action_entry *act;
993 struct dsa_port *to_dp;
994 int err;
995
996 if (!ds->ops->port_mirror_add)
997 return -EOPNOTSUPP;
998
999 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
1000 cls->common.extack))
1001 return -EOPNOTSUPP;
1002
1003 act = &cls->rule->action.entries[0];
1004
1005 if (!act->dev)
1006 return -EINVAL;
1007
1008 if (!dsa_slave_dev_check(act->dev))
1009 return -EOPNOTSUPP;
1010
1011 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1012 if (!mall_tc_entry)
1013 return -ENOMEM;
1014
1015 mall_tc_entry->cookie = cls->cookie;
1016 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
1017 mirror = &mall_tc_entry->mirror;
1018
1019 to_dp = dsa_slave_to_port(act->dev);
1020
1021 mirror->to_local_port = to_dp->index;
1022 mirror->ingress = ingress;
1023
1024 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
1025 if (err) {
1026 kfree(mall_tc_entry);
1027 return err;
1028 }
1029
1030 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
1031
1032 return err;
1033 }
1034
1035 static int
1036 dsa_slave_add_cls_matchall_police(struct net_device *dev,
1037 struct tc_cls_matchall_offload *cls,
1038 bool ingress)
1039 {
1040 struct netlink_ext_ack *extack = cls->common.extack;
1041 struct dsa_port *dp = dsa_slave_to_port(dev);
1042 struct dsa_slave_priv *p = netdev_priv(dev);
1043 struct dsa_mall_policer_tc_entry *policer;
1044 struct dsa_mall_tc_entry *mall_tc_entry;
1045 struct dsa_switch *ds = dp->ds;
1046 struct flow_action_entry *act;
1047 int err;
1048
1049 if (!ds->ops->port_policer_add) {
1050 NL_SET_ERR_MSG_MOD(extack,
1051 "Policing offload not implemented");
1052 return -EOPNOTSUPP;
1053 }
1054
1055 if (!ingress) {
1056 NL_SET_ERR_MSG_MOD(extack,
1057 "Only supported on ingress qdisc");
1058 return -EOPNOTSUPP;
1059 }
1060
1061 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
1062 cls->common.extack))
1063 return -EOPNOTSUPP;
1064
1065 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) {
1066 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) {
1067 NL_SET_ERR_MSG_MOD(extack,
1068 "Only one port policer allowed");
1069 return -EEXIST;
1070 }
1071 }
1072
1073 act = &cls->rule->action.entries[0];
1074
1075 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1076 if (!mall_tc_entry)
1077 return -ENOMEM;
1078
1079 mall_tc_entry->cookie = cls->cookie;
1080 mall_tc_entry->type = DSA_PORT_MALL_POLICER;
1081 policer = &mall_tc_entry->policer;
1082 policer->rate_bytes_per_sec = act->police.rate_bytes_ps;
1083 policer->burst = act->police.burst;
1084
1085 err = ds->ops->port_policer_add(ds, dp->index, policer);
1086 if (err) {
1087 kfree(mall_tc_entry);
1088 return err;
1089 }
1090
1091 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
1092
1093 return err;
1094 }
1095
1096 static int dsa_slave_add_cls_matchall(struct net_device *dev,
1097 struct tc_cls_matchall_offload *cls,
1098 bool ingress)
1099 {
1100 int err = -EOPNOTSUPP;
1101
1102 if (cls->common.protocol == htons(ETH_P_ALL) &&
1103 flow_offload_has_one_action(&cls->rule->action) &&
1104 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED)
1105 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress);
1106 else if (flow_offload_has_one_action(&cls->rule->action) &&
1107 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE)
1108 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress);
1109
1110 return err;
1111 }
1112
1113 static void dsa_slave_del_cls_matchall(struct net_device *dev,
1114 struct tc_cls_matchall_offload *cls)
1115 {
1116 struct dsa_port *dp = dsa_slave_to_port(dev);
1117 struct dsa_mall_tc_entry *mall_tc_entry;
1118 struct dsa_switch *ds = dp->ds;
1119
1120 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
1121 if (!mall_tc_entry)
1122 return;
1123
1124 list_del(&mall_tc_entry->list);
1125
1126 switch (mall_tc_entry->type) {
1127 case DSA_PORT_MALL_MIRROR:
1128 if (ds->ops->port_mirror_del)
1129 ds->ops->port_mirror_del(ds, dp->index,
1130 &mall_tc_entry->mirror);
1131 break;
1132 case DSA_PORT_MALL_POLICER:
1133 if (ds->ops->port_policer_del)
1134 ds->ops->port_policer_del(ds, dp->index);
1135 break;
1136 default:
1137 WARN_ON(1);
1138 }
1139
1140 kfree(mall_tc_entry);
1141 }
1142
1143 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
1144 struct tc_cls_matchall_offload *cls,
1145 bool ingress)
1146 {
1147 if (cls->common.chain_index)
1148 return -EOPNOTSUPP;
1149
1150 switch (cls->command) {
1151 case TC_CLSMATCHALL_REPLACE:
1152 return dsa_slave_add_cls_matchall(dev, cls, ingress);
1153 case TC_CLSMATCHALL_DESTROY:
1154 dsa_slave_del_cls_matchall(dev, cls);
1155 return 0;
1156 default:
1157 return -EOPNOTSUPP;
1158 }
1159 }
1160
1161 static int dsa_slave_add_cls_flower(struct net_device *dev,
1162 struct flow_cls_offload *cls,
1163 bool ingress)
1164 {
1165 struct dsa_port *dp = dsa_slave_to_port(dev);
1166 struct dsa_switch *ds = dp->ds;
1167 int port = dp->index;
1168
1169 if (!ds->ops->cls_flower_add)
1170 return -EOPNOTSUPP;
1171
1172 return ds->ops->cls_flower_add(ds, port, cls, ingress);
1173 }
1174
1175 static int dsa_slave_del_cls_flower(struct net_device *dev,
1176 struct flow_cls_offload *cls,
1177 bool ingress)
1178 {
1179 struct dsa_port *dp = dsa_slave_to_port(dev);
1180 struct dsa_switch *ds = dp->ds;
1181 int port = dp->index;
1182
1183 if (!ds->ops->cls_flower_del)
1184 return -EOPNOTSUPP;
1185
1186 return ds->ops->cls_flower_del(ds, port, cls, ingress);
1187 }
1188
1189 static int dsa_slave_stats_cls_flower(struct net_device *dev,
1190 struct flow_cls_offload *cls,
1191 bool ingress)
1192 {
1193 struct dsa_port *dp = dsa_slave_to_port(dev);
1194 struct dsa_switch *ds = dp->ds;
1195 int port = dp->index;
1196
1197 if (!ds->ops->cls_flower_stats)
1198 return -EOPNOTSUPP;
1199
1200 return ds->ops->cls_flower_stats(ds, port, cls, ingress);
1201 }
1202
1203 static int dsa_slave_setup_tc_cls_flower(struct net_device *dev,
1204 struct flow_cls_offload *cls,
1205 bool ingress)
1206 {
1207 switch (cls->command) {
1208 case FLOW_CLS_REPLACE:
1209 return dsa_slave_add_cls_flower(dev, cls, ingress);
1210 case FLOW_CLS_DESTROY:
1211 return dsa_slave_del_cls_flower(dev, cls, ingress);
1212 case FLOW_CLS_STATS:
1213 return dsa_slave_stats_cls_flower(dev, cls, ingress);
1214 default:
1215 return -EOPNOTSUPP;
1216 }
1217 }
1218
1219 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
1220 void *cb_priv, bool ingress)
1221 {
1222 struct net_device *dev = cb_priv;
1223
1224 if (!tc_can_offload(dev))
1225 return -EOPNOTSUPP;
1226
1227 switch (type) {
1228 case TC_SETUP_CLSMATCHALL:
1229 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
1230 case TC_SETUP_CLSFLOWER:
1231 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress);
1232 default:
1233 return -EOPNOTSUPP;
1234 }
1235 }
1236
1237 static int dsa_slave_setup_tc_block_cb_ig(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, true);
1241 }
1242
1243 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
1244 void *type_data, void *cb_priv)
1245 {
1246 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
1247 }
1248
1249 static LIST_HEAD(dsa_slave_block_cb_list);
1250
1251 static int dsa_slave_setup_tc_block(struct net_device *dev,
1252 struct flow_block_offload *f)
1253 {
1254 struct flow_block_cb *block_cb;
1255 flow_setup_cb_t *cb;
1256
1257 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
1258 cb = dsa_slave_setup_tc_block_cb_ig;
1259 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
1260 cb = dsa_slave_setup_tc_block_cb_eg;
1261 else
1262 return -EOPNOTSUPP;
1263
1264 f->driver_block_list = &dsa_slave_block_cb_list;
1265
1266 switch (f->command) {
1267 case FLOW_BLOCK_BIND:
1268 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list))
1269 return -EBUSY;
1270
1271 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL);
1272 if (IS_ERR(block_cb))
1273 return PTR_ERR(block_cb);
1274
1275 flow_block_cb_add(block_cb, f);
1276 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list);
1277 return 0;
1278 case FLOW_BLOCK_UNBIND:
1279 block_cb = flow_block_cb_lookup(f->block, cb, dev);
1280 if (!block_cb)
1281 return -ENOENT;
1282
1283 flow_block_cb_remove(block_cb, f);
1284 list_del(&block_cb->driver_list);
1285 return 0;
1286 default:
1287 return -EOPNOTSUPP;
1288 }
1289 }
1290
1291 static int dsa_slave_setup_ft_block(struct dsa_switch *ds, int port,
1292 void *type_data)
1293 {
1294 struct dsa_port *cpu_dp = dsa_to_port(ds, port)->cpu_dp;
1295 struct net_device *master = cpu_dp->master;
1296
1297 if (!master->netdev_ops->ndo_setup_tc)
1298 return -EOPNOTSUPP;
1299
1300 return master->netdev_ops->ndo_setup_tc(master, TC_SETUP_FT, type_data);
1301 }
1302
1303 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
1304 void *type_data)
1305 {
1306 struct dsa_port *dp = dsa_slave_to_port(dev);
1307 struct dsa_switch *ds = dp->ds;
1308
1309 switch (type) {
1310 case TC_SETUP_BLOCK:
1311 return dsa_slave_setup_tc_block(dev, type_data);
1312 case TC_SETUP_FT:
1313 return dsa_slave_setup_ft_block(ds, dp->index, type_data);
1314 default:
1315 break;
1316 }
1317
1318 if (!ds->ops->port_setup_tc)
1319 return -EOPNOTSUPP;
1320
1321 return ds->ops->port_setup_tc(ds, dp->index, type, type_data);
1322 }
1323
1324 static int dsa_slave_get_rxnfc(struct net_device *dev,
1325 struct ethtool_rxnfc *nfc, u32 *rule_locs)
1326 {
1327 struct dsa_port *dp = dsa_slave_to_port(dev);
1328 struct dsa_switch *ds = dp->ds;
1329
1330 if (!ds->ops->get_rxnfc)
1331 return -EOPNOTSUPP;
1332
1333 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
1334 }
1335
1336 static int dsa_slave_set_rxnfc(struct net_device *dev,
1337 struct ethtool_rxnfc *nfc)
1338 {
1339 struct dsa_port *dp = dsa_slave_to_port(dev);
1340 struct dsa_switch *ds = dp->ds;
1341
1342 if (!ds->ops->set_rxnfc)
1343 return -EOPNOTSUPP;
1344
1345 return ds->ops->set_rxnfc(ds, dp->index, nfc);
1346 }
1347
1348 static int dsa_slave_get_ts_info(struct net_device *dev,
1349 struct ethtool_ts_info *ts)
1350 {
1351 struct dsa_slave_priv *p = netdev_priv(dev);
1352 struct dsa_switch *ds = p->dp->ds;
1353
1354 if (!ds->ops->get_ts_info)
1355 return -EOPNOTSUPP;
1356
1357 return ds->ops->get_ts_info(ds, p->dp->index, ts);
1358 }
1359
1360 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
1361 u16 vid)
1362 {
1363 struct net_device *master = dsa_slave_to_master(dev);
1364 struct dsa_port *dp = dsa_slave_to_port(dev);
1365 struct switchdev_obj_port_vlan vlan = {
1366 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
1367 .vid = vid,
1368 /* This API only allows programming tagged, non-PVID VIDs */
1369 .flags = 0,
1370 };
1371 struct netlink_ext_ack extack = {0};
1372 int ret;
1373
1374 /* User port... */
1375 ret = dsa_port_vlan_add(dp, &vlan, &extack);
1376 if (ret) {
1377 if (extack._msg)
1378 netdev_err(dev, "%s\n", extack._msg);
1379 return ret;
1380 }
1381
1382 /* And CPU port... */
1383 ret = dsa_port_vlan_add(dp->cpu_dp, &vlan, &extack);
1384 if (ret) {
1385 if (extack._msg)
1386 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index,
1387 extack._msg);
1388 return ret;
1389 }
1390
1391 return vlan_vid_add(master, proto, vid);
1392 }
1393
1394 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
1395 u16 vid)
1396 {
1397 struct net_device *master = dsa_slave_to_master(dev);
1398 struct dsa_port *dp = dsa_slave_to_port(dev);
1399 struct switchdev_obj_port_vlan vlan = {
1400 .vid = vid,
1401 /* This API only allows programming tagged, non-PVID VIDs */
1402 .flags = 0,
1403 };
1404 int err;
1405
1406 /* Do not deprogram the CPU port as it may be shared with other user
1407 * ports which can be members of this VLAN as well.
1408 */
1409 err = dsa_port_vlan_del(dp, &vlan);
1410 if (err)
1411 return err;
1412
1413 vlan_vid_del(master, proto, vid);
1414
1415 return 0;
1416 }
1417
1418 struct dsa_hw_port {
1419 struct list_head list;
1420 struct net_device *dev;
1421 int old_mtu;
1422 };
1423
1424 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu)
1425 {
1426 const struct dsa_hw_port *p;
1427 int err;
1428
1429 list_for_each_entry(p, hw_port_list, list) {
1430 if (p->dev->mtu == mtu)
1431 continue;
1432
1433 err = dev_set_mtu(p->dev, mtu);
1434 if (err)
1435 goto rollback;
1436 }
1437
1438 return 0;
1439
1440 rollback:
1441 list_for_each_entry_continue_reverse(p, hw_port_list, list) {
1442 if (p->dev->mtu == p->old_mtu)
1443 continue;
1444
1445 if (dev_set_mtu(p->dev, p->old_mtu))
1446 netdev_err(p->dev, "Failed to restore MTU\n");
1447 }
1448
1449 return err;
1450 }
1451
1452 static void dsa_hw_port_list_free(struct list_head *hw_port_list)
1453 {
1454 struct dsa_hw_port *p, *n;
1455
1456 list_for_each_entry_safe(p, n, hw_port_list, list)
1457 kfree(p);
1458 }
1459
1460 /* Make the hardware datapath to/from @dev limited to a common MTU */
1461 static void dsa_bridge_mtu_normalization(struct dsa_port *dp)
1462 {
1463 struct list_head hw_port_list;
1464 struct dsa_switch_tree *dst;
1465 int min_mtu = ETH_MAX_MTU;
1466 struct dsa_port *other_dp;
1467 int err;
1468
1469 if (!dp->ds->mtu_enforcement_ingress)
1470 return;
1471
1472 if (!dp->bridge_dev)
1473 return;
1474
1475 INIT_LIST_HEAD(&hw_port_list);
1476
1477 /* Populate the list of ports that are part of the same bridge
1478 * as the newly added/modified port
1479 */
1480 list_for_each_entry(dst, &dsa_tree_list, list) {
1481 list_for_each_entry(other_dp, &dst->ports, list) {
1482 struct dsa_hw_port *hw_port;
1483 struct net_device *slave;
1484
1485 if (other_dp->type != DSA_PORT_TYPE_USER)
1486 continue;
1487
1488 if (other_dp->bridge_dev != dp->bridge_dev)
1489 continue;
1490
1491 if (!other_dp->ds->mtu_enforcement_ingress)
1492 continue;
1493
1494 slave = other_dp->slave;
1495
1496 if (min_mtu > slave->mtu)
1497 min_mtu = slave->mtu;
1498
1499 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL);
1500 if (!hw_port)
1501 goto out;
1502
1503 hw_port->dev = slave;
1504 hw_port->old_mtu = slave->mtu;
1505
1506 list_add(&hw_port->list, &hw_port_list);
1507 }
1508 }
1509
1510 /* Attempt to configure the entire hardware bridge to the newly added
1511 * interface's MTU first, regardless of whether the intention of the
1512 * user was to raise or lower it.
1513 */
1514 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu);
1515 if (!err)
1516 goto out;
1517
1518 /* Clearly that didn't work out so well, so just set the minimum MTU on
1519 * all hardware bridge ports now. If this fails too, then all ports will
1520 * still have their old MTU rolled back anyway.
1521 */
1522 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu);
1523
1524 out:
1525 dsa_hw_port_list_free(&hw_port_list);
1526 }
1527
1528 int dsa_slave_change_mtu(struct net_device *dev, int new_mtu)
1529 {
1530 struct net_device *master = dsa_slave_to_master(dev);
1531 struct dsa_port *dp = dsa_slave_to_port(dev);
1532 struct dsa_slave_priv *p = netdev_priv(dev);
1533 struct dsa_switch *ds = p->dp->ds;
1534 struct dsa_port *dp_iter;
1535 struct dsa_port *cpu_dp;
1536 int port = p->dp->index;
1537 int largest_mtu = 0;
1538 int new_master_mtu;
1539 int old_master_mtu;
1540 int mtu_limit;
1541 int cpu_mtu;
1542 int err;
1543
1544 if (!ds->ops->port_change_mtu)
1545 return -EOPNOTSUPP;
1546
1547 list_for_each_entry(dp_iter, &ds->dst->ports, list) {
1548 int slave_mtu;
1549
1550 if (!dsa_port_is_user(dp_iter))
1551 continue;
1552
1553 /* During probe, this function will be called for each slave
1554 * device, while not all of them have been allocated. That's
1555 * ok, it doesn't change what the maximum is, so ignore it.
1556 */
1557 if (!dp_iter->slave)
1558 continue;
1559
1560 /* Pretend that we already applied the setting, which we
1561 * actually haven't (still haven't done all integrity checks)
1562 */
1563 if (dp_iter == dp)
1564 slave_mtu = new_mtu;
1565 else
1566 slave_mtu = dp_iter->slave->mtu;
1567
1568 if (largest_mtu < slave_mtu)
1569 largest_mtu = slave_mtu;
1570 }
1571
1572 cpu_dp = dsa_to_port(ds, port)->cpu_dp;
1573
1574 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu);
1575 old_master_mtu = master->mtu;
1576 new_master_mtu = largest_mtu + dsa_tag_protocol_overhead(cpu_dp->tag_ops);
1577 if (new_master_mtu > mtu_limit)
1578 return -ERANGE;
1579
1580 /* If the master MTU isn't over limit, there's no need to check the CPU
1581 * MTU, since that surely isn't either.
1582 */
1583 cpu_mtu = largest_mtu;
1584
1585 /* Start applying stuff */
1586 if (new_master_mtu != old_master_mtu) {
1587 err = dev_set_mtu(master, new_master_mtu);
1588 if (err < 0)
1589 goto out_master_failed;
1590
1591 /* We only need to propagate the MTU of the CPU port to
1592 * upstream switches, so create a non-targeted notifier which
1593 * updates all switches.
1594 */
1595 err = dsa_port_mtu_change(cpu_dp, cpu_mtu, false);
1596 if (err)
1597 goto out_cpu_failed;
1598 }
1599
1600 err = dsa_port_mtu_change(dp, new_mtu, true);
1601 if (err)
1602 goto out_port_failed;
1603
1604 dev->mtu = new_mtu;
1605
1606 dsa_bridge_mtu_normalization(dp);
1607
1608 return 0;
1609
1610 out_port_failed:
1611 if (new_master_mtu != old_master_mtu)
1612 dsa_port_mtu_change(cpu_dp, old_master_mtu -
1613 dsa_tag_protocol_overhead(cpu_dp->tag_ops),
1614 false);
1615 out_cpu_failed:
1616 if (new_master_mtu != old_master_mtu)
1617 dev_set_mtu(master, old_master_mtu);
1618 out_master_failed:
1619 return err;
1620 }
1621
1622 static const struct ethtool_ops dsa_slave_ethtool_ops = {
1623 .get_drvinfo = dsa_slave_get_drvinfo,
1624 .get_regs_len = dsa_slave_get_regs_len,
1625 .get_regs = dsa_slave_get_regs,
1626 .nway_reset = dsa_slave_nway_reset,
1627 .get_link = ethtool_op_get_link,
1628 .get_eeprom_len = dsa_slave_get_eeprom_len,
1629 .get_eeprom = dsa_slave_get_eeprom,
1630 .set_eeprom = dsa_slave_set_eeprom,
1631 .get_strings = dsa_slave_get_strings,
1632 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
1633 .get_sset_count = dsa_slave_get_sset_count,
1634 .set_wol = dsa_slave_set_wol,
1635 .get_wol = dsa_slave_get_wol,
1636 .set_eee = dsa_slave_set_eee,
1637 .get_eee = dsa_slave_get_eee,
1638 .get_link_ksettings = dsa_slave_get_link_ksettings,
1639 .set_link_ksettings = dsa_slave_set_link_ksettings,
1640 .get_pauseparam = dsa_slave_get_pauseparam,
1641 .set_pauseparam = dsa_slave_set_pauseparam,
1642 .get_rxnfc = dsa_slave_get_rxnfc,
1643 .set_rxnfc = dsa_slave_set_rxnfc,
1644 .get_ts_info = dsa_slave_get_ts_info,
1645 .self_test = dsa_slave_net_selftest,
1646 };
1647
1648 static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
1649 {
1650 struct dsa_port *dp = dsa_slave_to_port(dev);
1651
1652 return dp->ds->devlink ? &dp->devlink_port : NULL;
1653 }
1654
1655 static void dsa_slave_get_stats64(struct net_device *dev,
1656 struct rtnl_link_stats64 *s)
1657 {
1658 struct dsa_port *dp = dsa_slave_to_port(dev);
1659 struct dsa_switch *ds = dp->ds;
1660
1661 if (ds->ops->get_stats64)
1662 ds->ops->get_stats64(ds, dp->index, s);
1663 else
1664 dev_get_tstats64(dev, s);
1665 }
1666
1667 static int dsa_slave_fill_forward_path(struct net_device_path_ctx *ctx,
1668 struct net_device_path *path)
1669 {
1670 struct dsa_port *dp = dsa_slave_to_port(ctx->dev);
1671 struct dsa_port *cpu_dp = dp->cpu_dp;
1672
1673 path->dev = ctx->dev;
1674 path->type = DEV_PATH_DSA;
1675 path->dsa.proto = cpu_dp->tag_ops->proto;
1676 path->dsa.port = dp->index;
1677 ctx->dev = cpu_dp->master;
1678
1679 return 0;
1680 }
1681
1682 static const struct net_device_ops dsa_slave_netdev_ops = {
1683 .ndo_open = dsa_slave_open,
1684 .ndo_stop = dsa_slave_close,
1685 .ndo_start_xmit = dsa_slave_xmit,
1686 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
1687 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
1688 .ndo_set_mac_address = dsa_slave_set_mac_address,
1689 .ndo_fdb_dump = dsa_slave_fdb_dump,
1690 .ndo_do_ioctl = dsa_slave_ioctl,
1691 .ndo_get_iflink = dsa_slave_get_iflink,
1692 #ifdef CONFIG_NET_POLL_CONTROLLER
1693 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
1694 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
1695 .ndo_poll_controller = dsa_slave_poll_controller,
1696 #endif
1697 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
1698 .ndo_setup_tc = dsa_slave_setup_tc,
1699 .ndo_get_stats64 = dsa_slave_get_stats64,
1700 .ndo_get_port_parent_id = dsa_slave_get_port_parent_id,
1701 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
1702 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
1703 .ndo_get_devlink_port = dsa_slave_get_devlink_port,
1704 .ndo_change_mtu = dsa_slave_change_mtu,
1705 .ndo_fill_forward_path = dsa_slave_fill_forward_path,
1706 };
1707
1708 static struct device_type dsa_type = {
1709 .name = "dsa",
1710 };
1711
1712 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
1713 {
1714 const struct dsa_port *dp = dsa_to_port(ds, port);
1715
1716 if (dp->pl)
1717 phylink_mac_change(dp->pl, up);
1718 }
1719 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
1720
1721 static void dsa_slave_phylink_fixed_state(struct phylink_config *config,
1722 struct phylink_link_state *state)
1723 {
1724 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1725 struct dsa_switch *ds = dp->ds;
1726
1727 /* No need to check that this operation is valid, the callback would
1728 * not be called if it was not.
1729 */
1730 ds->ops->phylink_fixed_state(ds, dp->index, state);
1731 }
1732
1733 /* slave device setup *******************************************************/
1734 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr,
1735 u32 flags)
1736 {
1737 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1738 struct dsa_switch *ds = dp->ds;
1739
1740 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
1741 if (!slave_dev->phydev) {
1742 netdev_err(slave_dev, "no phy at %d\n", addr);
1743 return -ENODEV;
1744 }
1745
1746 slave_dev->phydev->dev_flags |= flags;
1747
1748 return phylink_connect_phy(dp->pl, slave_dev->phydev);
1749 }
1750
1751 static int dsa_slave_phy_setup(struct net_device *slave_dev)
1752 {
1753 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1754 struct device_node *port_dn = dp->dn;
1755 struct dsa_switch *ds = dp->ds;
1756 phy_interface_t mode;
1757 u32 phy_flags = 0;
1758 int ret;
1759
1760 ret = of_get_phy_mode(port_dn, &mode);
1761 if (ret)
1762 mode = PHY_INTERFACE_MODE_NA;
1763
1764 dp->pl_config.dev = &slave_dev->dev;
1765 dp->pl_config.type = PHYLINK_NETDEV;
1766
1767 /* The get_fixed_state callback takes precedence over polling the
1768 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set
1769 * this if the switch provides such a callback.
1770 */
1771 if (ds->ops->phylink_fixed_state) {
1772 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state;
1773 dp->pl_config.poll_fixed_state = true;
1774 }
1775
1776 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode,
1777 &dsa_port_phylink_mac_ops);
1778 if (IS_ERR(dp->pl)) {
1779 netdev_err(slave_dev,
1780 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1781 return PTR_ERR(dp->pl);
1782 }
1783
1784 if (ds->ops->get_phy_flags)
1785 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
1786
1787 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
1788 if (ret == -ENODEV && ds->slave_mii_bus) {
1789 /* We could not connect to a designated PHY or SFP, so try to
1790 * use the switch internal MDIO bus instead
1791 */
1792 ret = dsa_slave_phy_connect(slave_dev, dp->index, phy_flags);
1793 if (ret) {
1794 netdev_err(slave_dev,
1795 "failed to connect to port %d: %d\n",
1796 dp->index, ret);
1797 phylink_destroy(dp->pl);
1798 return ret;
1799 }
1800 }
1801
1802 return ret;
1803 }
1804
1805 void dsa_slave_setup_tagger(struct net_device *slave)
1806 {
1807 struct dsa_port *dp = dsa_slave_to_port(slave);
1808 struct dsa_slave_priv *p = netdev_priv(slave);
1809 const struct dsa_port *cpu_dp = dp->cpu_dp;
1810 struct net_device *master = cpu_dp->master;
1811 const struct dsa_switch *ds = dp->ds;
1812
1813 slave->needed_headroom = cpu_dp->tag_ops->needed_headroom;
1814 slave->needed_tailroom = cpu_dp->tag_ops->needed_tailroom;
1815 /* Try to save one extra realloc later in the TX path (in the master)
1816 * by also inheriting the master's needed headroom and tailroom.
1817 * The 8021q driver also does this.
1818 */
1819 slave->needed_headroom += master->needed_headroom;
1820 slave->needed_tailroom += master->needed_tailroom;
1821
1822 p->xmit = cpu_dp->tag_ops->xmit;
1823
1824 slave->features = master->vlan_features | NETIF_F_HW_TC;
1825 if (ds->ops->port_vlan_add && ds->ops->port_vlan_del)
1826 slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1827 slave->hw_features |= NETIF_F_HW_TC;
1828 slave->features |= NETIF_F_LLTX;
1829 if (slave->needed_tailroom)
1830 slave->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST);
1831 }
1832
1833 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1834 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1835 struct netdev_queue *txq,
1836 void *_unused)
1837 {
1838 lockdep_set_class(&txq->_xmit_lock,
1839 &dsa_slave_netdev_xmit_lock_key);
1840 }
1841
1842 int dsa_slave_suspend(struct net_device *slave_dev)
1843 {
1844 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1845
1846 if (!netif_running(slave_dev))
1847 return 0;
1848
1849 netif_device_detach(slave_dev);
1850
1851 rtnl_lock();
1852 phylink_stop(dp->pl);
1853 rtnl_unlock();
1854
1855 return 0;
1856 }
1857
1858 int dsa_slave_resume(struct net_device *slave_dev)
1859 {
1860 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1861
1862 if (!netif_running(slave_dev))
1863 return 0;
1864
1865 netif_device_attach(slave_dev);
1866
1867 rtnl_lock();
1868 phylink_start(dp->pl);
1869 rtnl_unlock();
1870
1871 return 0;
1872 }
1873
1874 int dsa_slave_create(struct dsa_port *port)
1875 {
1876 const struct dsa_port *cpu_dp = port->cpu_dp;
1877 struct net_device *master = cpu_dp->master;
1878 struct dsa_switch *ds = port->ds;
1879 const char *name = port->name;
1880 struct net_device *slave_dev;
1881 struct dsa_slave_priv *p;
1882 int ret;
1883
1884 if (!ds->num_tx_queues)
1885 ds->num_tx_queues = 1;
1886
1887 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
1888 NET_NAME_UNKNOWN, ether_setup,
1889 ds->num_tx_queues, 1);
1890 if (slave_dev == NULL)
1891 return -ENOMEM;
1892
1893 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1894 if (!is_zero_ether_addr(port->mac))
1895 ether_addr_copy(slave_dev->dev_addr, port->mac);
1896 else
1897 eth_hw_addr_inherit(slave_dev, master);
1898 slave_dev->priv_flags |= IFF_NO_QUEUE;
1899 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1900 if (ds->ops->port_max_mtu)
1901 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index);
1902 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1903
1904 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1905 NULL);
1906
1907 SET_NETDEV_DEV(slave_dev, port->ds->dev);
1908 slave_dev->dev.of_node = port->dn;
1909 slave_dev->vlan_features = master->vlan_features;
1910
1911 p = netdev_priv(slave_dev);
1912 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1913 if (!slave_dev->tstats) {
1914 free_netdev(slave_dev);
1915 return -ENOMEM;
1916 }
1917
1918 ret = gro_cells_init(&p->gcells, slave_dev);
1919 if (ret)
1920 goto out_free;
1921
1922 p->dp = port;
1923 INIT_LIST_HEAD(&p->mall_tc_list);
1924 port->slave = slave_dev;
1925 dsa_slave_setup_tagger(slave_dev);
1926
1927 rtnl_lock();
1928 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN);
1929 rtnl_unlock();
1930 if (ret && ret != -EOPNOTSUPP)
1931 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n",
1932 ret, ETH_DATA_LEN, port->index);
1933
1934 netif_carrier_off(slave_dev);
1935
1936 ret = dsa_slave_phy_setup(slave_dev);
1937 if (ret) {
1938 netdev_err(slave_dev,
1939 "error %d setting up PHY for tree %d, switch %d, port %d\n",
1940 ret, ds->dst->index, ds->index, port->index);
1941 goto out_gcells;
1942 }
1943
1944 rtnl_lock();
1945
1946 ret = register_netdevice(slave_dev);
1947 if (ret) {
1948 netdev_err(master, "error %d registering interface %s\n",
1949 ret, slave_dev->name);
1950 rtnl_unlock();
1951 goto out_phy;
1952 }
1953
1954 ret = netdev_upper_dev_link(master, slave_dev, NULL);
1955
1956 rtnl_unlock();
1957
1958 if (ret)
1959 goto out_unregister;
1960
1961 return 0;
1962
1963 out_unregister:
1964 unregister_netdev(slave_dev);
1965 out_phy:
1966 rtnl_lock();
1967 phylink_disconnect_phy(p->dp->pl);
1968 rtnl_unlock();
1969 phylink_destroy(p->dp->pl);
1970 out_gcells:
1971 gro_cells_destroy(&p->gcells);
1972 out_free:
1973 free_percpu(slave_dev->tstats);
1974 free_netdev(slave_dev);
1975 port->slave = NULL;
1976 return ret;
1977 }
1978
1979 void dsa_slave_destroy(struct net_device *slave_dev)
1980 {
1981 struct net_device *master = dsa_slave_to_master(slave_dev);
1982 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1983 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1984
1985 netif_carrier_off(slave_dev);
1986 rtnl_lock();
1987 netdev_upper_dev_unlink(master, slave_dev);
1988 unregister_netdevice(slave_dev);
1989 phylink_disconnect_phy(dp->pl);
1990 rtnl_unlock();
1991
1992 phylink_destroy(dp->pl);
1993 gro_cells_destroy(&p->gcells);
1994 free_percpu(slave_dev->tstats);
1995 free_netdev(slave_dev);
1996 }
1997
1998 bool dsa_slave_dev_check(const struct net_device *dev)
1999 {
2000 return dev->netdev_ops == &dsa_slave_netdev_ops;
2001 }
2002 EXPORT_SYMBOL_GPL(dsa_slave_dev_check);
2003
2004 static int dsa_slave_changeupper(struct net_device *dev,
2005 struct netdev_notifier_changeupper_info *info)
2006 {
2007 struct dsa_port *dp = dsa_slave_to_port(dev);
2008 struct netlink_ext_ack *extack;
2009 int err = NOTIFY_DONE;
2010
2011 extack = netdev_notifier_info_to_extack(&info->info);
2012
2013 if (netif_is_bridge_master(info->upper_dev)) {
2014 if (info->linking) {
2015 err = dsa_port_bridge_join(dp, info->upper_dev, extack);
2016 if (!err)
2017 dsa_bridge_mtu_normalization(dp);
2018 err = notifier_from_errno(err);
2019 } else {
2020 dsa_port_bridge_leave(dp, info->upper_dev);
2021 err = NOTIFY_OK;
2022 }
2023 } else if (netif_is_lag_master(info->upper_dev)) {
2024 if (info->linking) {
2025 err = dsa_port_lag_join(dp, info->upper_dev,
2026 info->upper_info, extack);
2027 if (err == -EOPNOTSUPP) {
2028 NL_SET_ERR_MSG_MOD(info->info.extack,
2029 "Offloading not supported");
2030 err = 0;
2031 }
2032 err = notifier_from_errno(err);
2033 } else {
2034 dsa_port_lag_leave(dp, info->upper_dev);
2035 err = NOTIFY_OK;
2036 }
2037 } else if (is_hsr_master(info->upper_dev)) {
2038 if (info->linking) {
2039 err = dsa_port_hsr_join(dp, info->upper_dev);
2040 if (err == -EOPNOTSUPP) {
2041 NL_SET_ERR_MSG_MOD(info->info.extack,
2042 "Offloading not supported");
2043 err = 0;
2044 }
2045 err = notifier_from_errno(err);
2046 } else {
2047 dsa_port_hsr_leave(dp, info->upper_dev);
2048 err = NOTIFY_OK;
2049 }
2050 }
2051
2052 return err;
2053 }
2054
2055 static int dsa_slave_prechangeupper(struct net_device *dev,
2056 struct netdev_notifier_changeupper_info *info)
2057 {
2058 struct dsa_port *dp = dsa_slave_to_port(dev);
2059 struct netlink_ext_ack *extack;
2060 int err = 0;
2061
2062 extack = netdev_notifier_info_to_extack(&info->info);
2063
2064 if (netif_is_bridge_master(info->upper_dev) && !info->linking)
2065 err = dsa_port_pre_bridge_leave(dp, info->upper_dev, extack);
2066 else if (netif_is_lag_master(info->upper_dev) && !info->linking)
2067 err = dsa_port_pre_lag_leave(dp, info->upper_dev, extack);
2068 /* dsa_port_pre_hsr_leave is not yet necessary since hsr cannot be
2069 * meaningfully enslaved to a bridge yet
2070 */
2071
2072 return notifier_from_errno(err);
2073 }
2074
2075 static int
2076 dsa_slave_lag_changeupper(struct net_device *dev,
2077 struct netdev_notifier_changeupper_info *info)
2078 {
2079 struct net_device *lower;
2080 struct list_head *iter;
2081 int err = NOTIFY_DONE;
2082 struct dsa_port *dp;
2083
2084 netdev_for_each_lower_dev(dev, lower, iter) {
2085 if (!dsa_slave_dev_check(lower))
2086 continue;
2087
2088 dp = dsa_slave_to_port(lower);
2089 if (!dp->lag_dev)
2090 /* Software LAG */
2091 continue;
2092
2093 err = dsa_slave_changeupper(lower, info);
2094 if (notifier_to_errno(err))
2095 break;
2096 }
2097
2098 return err;
2099 }
2100
2101 /* Same as dsa_slave_lag_changeupper() except that it calls
2102 * dsa_slave_prechangeupper()
2103 */
2104 static int
2105 dsa_slave_lag_prechangeupper(struct net_device *dev,
2106 struct netdev_notifier_changeupper_info *info)
2107 {
2108 struct net_device *lower;
2109 struct list_head *iter;
2110 int err = NOTIFY_DONE;
2111 struct dsa_port *dp;
2112
2113 netdev_for_each_lower_dev(dev, lower, iter) {
2114 if (!dsa_slave_dev_check(lower))
2115 continue;
2116
2117 dp = dsa_slave_to_port(lower);
2118 if (!dp->lag_dev)
2119 /* Software LAG */
2120 continue;
2121
2122 err = dsa_slave_prechangeupper(lower, info);
2123 if (notifier_to_errno(err))
2124 break;
2125 }
2126
2127 return err;
2128 }
2129
2130 static int
2131 dsa_prevent_bridging_8021q_upper(struct net_device *dev,
2132 struct netdev_notifier_changeupper_info *info)
2133 {
2134 struct netlink_ext_ack *ext_ack;
2135 struct net_device *slave;
2136 struct dsa_port *dp;
2137
2138 ext_ack = netdev_notifier_info_to_extack(&info->info);
2139
2140 if (!is_vlan_dev(dev))
2141 return NOTIFY_DONE;
2142
2143 slave = vlan_dev_real_dev(dev);
2144 if (!dsa_slave_dev_check(slave))
2145 return NOTIFY_DONE;
2146
2147 dp = dsa_slave_to_port(slave);
2148 if (!dp->bridge_dev)
2149 return NOTIFY_DONE;
2150
2151 /* Deny enslaving a VLAN device into a VLAN-aware bridge */
2152 if (br_vlan_enabled(dp->bridge_dev) &&
2153 netif_is_bridge_master(info->upper_dev) && info->linking) {
2154 NL_SET_ERR_MSG_MOD(ext_ack,
2155 "Cannot enslave VLAN device into VLAN aware bridge");
2156 return notifier_from_errno(-EINVAL);
2157 }
2158
2159 return NOTIFY_DONE;
2160 }
2161
2162 static int
2163 dsa_slave_check_8021q_upper(struct net_device *dev,
2164 struct netdev_notifier_changeupper_info *info)
2165 {
2166 struct dsa_port *dp = dsa_slave_to_port(dev);
2167 struct net_device *br = dp->bridge_dev;
2168 struct bridge_vlan_info br_info;
2169 struct netlink_ext_ack *extack;
2170 int err = NOTIFY_DONE;
2171 u16 vid;
2172
2173 if (!br || !br_vlan_enabled(br))
2174 return NOTIFY_DONE;
2175
2176 extack = netdev_notifier_info_to_extack(&info->info);
2177 vid = vlan_dev_vlan_id(info->upper_dev);
2178
2179 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
2180 * device, respectively the VID is not found, returning
2181 * 0 means success, which is a failure for us here.
2182 */
2183 err = br_vlan_get_info(br, vid, &br_info);
2184 if (err == 0) {
2185 NL_SET_ERR_MSG_MOD(extack,
2186 "This VLAN is already configured by the bridge");
2187 return notifier_from_errno(-EBUSY);
2188 }
2189
2190 return NOTIFY_DONE;
2191 }
2192
2193 static int
2194 dsa_slave_prechangeupper_sanity_check(struct net_device *dev,
2195 struct netdev_notifier_changeupper_info *info)
2196 {
2197 struct dsa_switch *ds;
2198 struct dsa_port *dp;
2199 int err;
2200
2201 if (!dsa_slave_dev_check(dev))
2202 return dsa_prevent_bridging_8021q_upper(dev, info);
2203
2204 dp = dsa_slave_to_port(dev);
2205 ds = dp->ds;
2206
2207 if (ds->ops->port_prechangeupper) {
2208 err = ds->ops->port_prechangeupper(ds, dp->index, info);
2209 if (err)
2210 return notifier_from_errno(err);
2211 }
2212
2213 if (is_vlan_dev(info->upper_dev))
2214 return dsa_slave_check_8021q_upper(dev, info);
2215
2216 return NOTIFY_DONE;
2217 }
2218
2219 static int dsa_slave_netdevice_event(struct notifier_block *nb,
2220 unsigned long event, void *ptr)
2221 {
2222 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2223
2224 switch (event) {
2225 case NETDEV_PRECHANGEUPPER: {
2226 struct netdev_notifier_changeupper_info *info = ptr;
2227 int err;
2228
2229 err = dsa_slave_prechangeupper_sanity_check(dev, info);
2230 if (err != NOTIFY_DONE)
2231 return err;
2232
2233 if (dsa_slave_dev_check(dev))
2234 return dsa_slave_prechangeupper(dev, ptr);
2235
2236 if (netif_is_lag_master(dev))
2237 return dsa_slave_lag_prechangeupper(dev, ptr);
2238
2239 break;
2240 }
2241 case NETDEV_CHANGEUPPER:
2242 if (dsa_slave_dev_check(dev))
2243 return dsa_slave_changeupper(dev, ptr);
2244
2245 if (netif_is_lag_master(dev))
2246 return dsa_slave_lag_changeupper(dev, ptr);
2247
2248 break;
2249 case NETDEV_CHANGELOWERSTATE: {
2250 struct netdev_notifier_changelowerstate_info *info = ptr;
2251 struct dsa_port *dp;
2252 int err;
2253
2254 if (!dsa_slave_dev_check(dev))
2255 break;
2256
2257 dp = dsa_slave_to_port(dev);
2258
2259 err = dsa_port_lag_change(dp, info->lower_state_info);
2260 return notifier_from_errno(err);
2261 }
2262 case NETDEV_GOING_DOWN: {
2263 struct dsa_port *dp, *cpu_dp;
2264 struct dsa_switch_tree *dst;
2265 LIST_HEAD(close_list);
2266
2267 if (!netdev_uses_dsa(dev))
2268 return NOTIFY_DONE;
2269
2270 cpu_dp = dev->dsa_ptr;
2271 dst = cpu_dp->ds->dst;
2272
2273 list_for_each_entry(dp, &dst->ports, list) {
2274 if (!dsa_is_user_port(dp->ds, dp->index))
2275 continue;
2276
2277 list_add(&dp->slave->close_list, &close_list);
2278 }
2279
2280 dev_close_many(&close_list, true);
2281
2282 return NOTIFY_OK;
2283 }
2284 default:
2285 break;
2286 }
2287
2288 return NOTIFY_DONE;
2289 }
2290
2291 static void
2292 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work)
2293 {
2294 struct switchdev_notifier_fdb_info info = {};
2295 struct dsa_switch *ds = switchdev_work->ds;
2296 struct dsa_port *dp;
2297
2298 if (!dsa_is_user_port(ds, switchdev_work->port))
2299 return;
2300
2301 info.addr = switchdev_work->addr;
2302 info.vid = switchdev_work->vid;
2303 info.offloaded = true;
2304 dp = dsa_to_port(ds, switchdev_work->port);
2305 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
2306 dp->slave, &info.info, NULL);
2307 }
2308
2309 static void dsa_slave_switchdev_event_work(struct work_struct *work)
2310 {
2311 struct dsa_switchdev_event_work *switchdev_work =
2312 container_of(work, struct dsa_switchdev_event_work, work);
2313 struct dsa_switch *ds = switchdev_work->ds;
2314 struct dsa_port *dp;
2315 int err;
2316
2317 dp = dsa_to_port(ds, switchdev_work->port);
2318
2319 rtnl_lock();
2320 switch (switchdev_work->event) {
2321 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2322 if (switchdev_work->host_addr)
2323 err = dsa_port_host_fdb_add(dp, switchdev_work->addr,
2324 switchdev_work->vid);
2325 else
2326 err = dsa_port_fdb_add(dp, switchdev_work->addr,
2327 switchdev_work->vid);
2328 if (err) {
2329 dev_err(ds->dev,
2330 "port %d failed to add %pM vid %d to fdb: %d\n",
2331 dp->index, switchdev_work->addr,
2332 switchdev_work->vid, err);
2333 break;
2334 }
2335 dsa_fdb_offload_notify(switchdev_work);
2336 break;
2337
2338 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2339 if (switchdev_work->host_addr)
2340 err = dsa_port_host_fdb_del(dp, switchdev_work->addr,
2341 switchdev_work->vid);
2342 else
2343 err = dsa_port_fdb_del(dp, switchdev_work->addr,
2344 switchdev_work->vid);
2345 if (err) {
2346 dev_err(ds->dev,
2347 "port %d failed to delete %pM vid %d from fdb: %d\n",
2348 dp->index, switchdev_work->addr,
2349 switchdev_work->vid, err);
2350 }
2351
2352 break;
2353 }
2354 rtnl_unlock();
2355
2356 dev_put(switchdev_work->dev);
2357 kfree(switchdev_work);
2358 }
2359
2360 static int dsa_lower_dev_walk(struct net_device *lower_dev,
2361 struct netdev_nested_priv *priv)
2362 {
2363 if (dsa_slave_dev_check(lower_dev)) {
2364 priv->data = (void *)netdev_priv(lower_dev);
2365 return 1;
2366 }
2367
2368 return 0;
2369 }
2370
2371 static struct dsa_slave_priv *dsa_slave_dev_lower_find(struct net_device *dev)
2372 {
2373 struct netdev_nested_priv priv = {
2374 .data = NULL,
2375 };
2376
2377 netdev_walk_all_lower_dev_rcu(dev, dsa_lower_dev_walk, &priv);
2378
2379 return (struct dsa_slave_priv *)priv.data;
2380 }
2381
2382 /* Called under rcu_read_lock() */
2383 static int dsa_slave_switchdev_event(struct notifier_block *unused,
2384 unsigned long event, void *ptr)
2385 {
2386 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2387 const struct switchdev_notifier_fdb_info *fdb_info;
2388 struct dsa_switchdev_event_work *switchdev_work;
2389 bool host_addr = false;
2390 struct dsa_port *dp;
2391 int err;
2392
2393 switch (event) {
2394 case SWITCHDEV_PORT_ATTR_SET:
2395 err = switchdev_handle_port_attr_set(dev, ptr,
2396 dsa_slave_dev_check,
2397 dsa_slave_port_attr_set);
2398 return notifier_from_errno(err);
2399 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2400 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2401 fdb_info = ptr;
2402
2403 if (dsa_slave_dev_check(dev)) {
2404 dp = dsa_slave_to_port(dev);
2405
2406 if (fdb_info->is_local)
2407 host_addr = true;
2408 else if (!fdb_info->added_by_user)
2409 return NOTIFY_OK;
2410 } else {
2411 /* Snoop addresses added to foreign interfaces
2412 * bridged with us, or the bridge
2413 * itself. Dynamically learned addresses can
2414 * also be added for switches that don't
2415 * automatically learn SA from CPU-injected
2416 * traffic.
2417 */
2418 struct net_device *br_dev;
2419 struct dsa_slave_priv *p;
2420
2421 if (netif_is_bridge_master(dev))
2422 br_dev = dev;
2423 else
2424 br_dev = netdev_master_upper_dev_get_rcu(dev);
2425
2426 if (!br_dev)
2427 return NOTIFY_DONE;
2428
2429 if (!netif_is_bridge_master(br_dev))
2430 return NOTIFY_DONE;
2431
2432 p = dsa_slave_dev_lower_find(br_dev);
2433 if (!p)
2434 return NOTIFY_DONE;
2435
2436 dp = p->dp;
2437 host_addr = fdb_info->is_local;
2438
2439 /* FDB entries learned by the software bridge should
2440 * be installed as host addresses only if the driver
2441 * requests assisted learning.
2442 * On the other hand, FDB entries for local termination
2443 * should always be installed.
2444 */
2445 if (!fdb_info->added_by_user && !fdb_info->is_local &&
2446 !dp->ds->assisted_learning_on_cpu_port)
2447 return NOTIFY_DONE;
2448
2449 /* When the bridge learns an address on an offloaded
2450 * LAG we don't want to send traffic to the CPU, the
2451 * other ports bridged with the LAG should be able to
2452 * autonomously forward towards it.
2453 * On the other hand, if the address is local
2454 * (therefore not learned) then we want to trap it to
2455 * the CPU regardless of whether the interface it
2456 * belongs to is offloaded or not.
2457 */
2458 if (dsa_tree_offloads_bridge_port(dp->ds->dst, dev) &&
2459 !fdb_info->is_local)
2460 return NOTIFY_DONE;
2461 }
2462
2463 if (!dp->ds->ops->port_fdb_add || !dp->ds->ops->port_fdb_del)
2464 return NOTIFY_DONE;
2465
2466 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2467 if (!switchdev_work)
2468 return NOTIFY_BAD;
2469
2470 INIT_WORK(&switchdev_work->work,
2471 dsa_slave_switchdev_event_work);
2472 switchdev_work->ds = dp->ds;
2473 switchdev_work->port = dp->index;
2474 switchdev_work->event = event;
2475 switchdev_work->dev = dev;
2476
2477 ether_addr_copy(switchdev_work->addr,
2478 fdb_info->addr);
2479 switchdev_work->vid = fdb_info->vid;
2480 switchdev_work->host_addr = host_addr;
2481
2482 /* Hold a reference for dsa_fdb_offload_notify */
2483 dev_hold(dev);
2484 dsa_schedule_work(&switchdev_work->work);
2485 break;
2486 default:
2487 return NOTIFY_DONE;
2488 }
2489
2490 return NOTIFY_OK;
2491 }
2492
2493 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
2494 unsigned long event, void *ptr)
2495 {
2496 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2497 int err;
2498
2499 switch (event) {
2500 case SWITCHDEV_PORT_OBJ_ADD:
2501 err = switchdev_handle_port_obj_add(dev, ptr,
2502 dsa_slave_dev_check,
2503 dsa_slave_port_obj_add);
2504 return notifier_from_errno(err);
2505 case SWITCHDEV_PORT_OBJ_DEL:
2506 err = switchdev_handle_port_obj_del(dev, ptr,
2507 dsa_slave_dev_check,
2508 dsa_slave_port_obj_del);
2509 return notifier_from_errno(err);
2510 case SWITCHDEV_PORT_ATTR_SET:
2511 err = switchdev_handle_port_attr_set(dev, ptr,
2512 dsa_slave_dev_check,
2513 dsa_slave_port_attr_set);
2514 return notifier_from_errno(err);
2515 }
2516
2517 return NOTIFY_DONE;
2518 }
2519
2520 static struct notifier_block dsa_slave_nb __read_mostly = {
2521 .notifier_call = dsa_slave_netdevice_event,
2522 };
2523
2524 struct notifier_block dsa_slave_switchdev_notifier = {
2525 .notifier_call = dsa_slave_switchdev_event,
2526 };
2527
2528 struct notifier_block dsa_slave_switchdev_blocking_notifier = {
2529 .notifier_call = dsa_slave_switchdev_blocking_event,
2530 };
2531
2532 int dsa_slave_register_notifier(void)
2533 {
2534 struct notifier_block *nb;
2535 int err;
2536
2537 err = register_netdevice_notifier(&dsa_slave_nb);
2538 if (err)
2539 return err;
2540
2541 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
2542 if (err)
2543 goto err_switchdev_nb;
2544
2545 nb = &dsa_slave_switchdev_blocking_notifier;
2546 err = register_switchdev_blocking_notifier(nb);
2547 if (err)
2548 goto err_switchdev_blocking_nb;
2549
2550 return 0;
2551
2552 err_switchdev_blocking_nb:
2553 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2554 err_switchdev_nb:
2555 unregister_netdevice_notifier(&dsa_slave_nb);
2556 return err;
2557 }
2558
2559 void dsa_slave_unregister_notifier(void)
2560 {
2561 struct notifier_block *nb;
2562 int err;
2563
2564 nb = &dsa_slave_switchdev_blocking_notifier;
2565 err = unregister_switchdev_blocking_notifier(nb);
2566 if (err)
2567 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
2568
2569 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2570 if (err)
2571 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
2572
2573 err = unregister_netdevice_notifier(&dsa_slave_nb);
2574 if (err)
2575 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
2576 }
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