1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * net/dsa/user.c - user device handling
4 * Copyright (c) 2008-2009 Marvell Semiconductor
7 #include <linux/list.h>
8 #include <linux/etherdevice.h>
9 #include <linux/netdevice.h>
10 #include <linux/phy.h>
11 #include <linux/phy_fixed.h>
12 #include <linux/phylink.h>
13 #include <linux/of_net.h>
14 #include <linux/of_mdio.h>
15 #include <linux/mdio.h>
16 #include <net/rtnetlink.h>
17 #include <net/pkt_cls.h>
18 #include <net/selftests.h>
19 #include <net/tc_act/tc_mirred.h>
20 #include <linux/if_bridge.h>
21 #include <linux/if_hsr.h>
22 #include <net/dcbnl.h>
23 #include <linux/netpoll.h>
24 #include <linux/string.h>
34 struct dsa_switchdev_event_work {
35 struct net_device *dev;
36 struct net_device *orig_dev;
37 struct work_struct work;
39 /* Specific for SWITCHDEV_FDB_ADD_TO_DEVICE and
40 * SWITCHDEV_FDB_DEL_TO_DEVICE
42 unsigned char addr[ETH_ALEN];
47 enum dsa_standalone_event {
54 struct dsa_standalone_event_work {
55 struct work_struct work;
56 struct net_device *dev;
57 enum dsa_standalone_event event;
58 unsigned char addr[ETH_ALEN];
62 struct dsa_host_vlan_rx_filtering_ctx {
63 struct net_device *dev;
64 const unsigned char *addr;
65 enum dsa_standalone_event event;
68 static bool dsa_switch_supports_uc_filtering(struct dsa_switch *ds)
70 return ds->ops->port_fdb_add && ds->ops->port_fdb_del &&
71 ds->fdb_isolation && !ds->vlan_filtering_is_global &&
72 !ds->needs_standalone_vlan_filtering;
75 static bool dsa_switch_supports_mc_filtering(struct dsa_switch *ds)
77 return ds->ops->port_mdb_add && ds->ops->port_mdb_del &&
78 ds->fdb_isolation && !ds->vlan_filtering_is_global &&
79 !ds->needs_standalone_vlan_filtering;
82 static void dsa_user_standalone_event_work(struct work_struct *work)
84 struct dsa_standalone_event_work *standalone_work =
85 container_of(work, struct dsa_standalone_event_work, work);
86 const unsigned char *addr = standalone_work->addr;
87 struct net_device *dev = standalone_work->dev;
88 struct dsa_port *dp = dsa_user_to_port(dev);
89 struct switchdev_obj_port_mdb mdb;
90 struct dsa_switch *ds = dp->ds;
91 u16 vid = standalone_work->vid;
94 switch (standalone_work->event) {
96 err = dsa_port_standalone_host_fdb_add(dp, addr, vid);
99 "port %d failed to add %pM vid %d to fdb: %d\n",
100 dp->index, addr, vid, err);
106 err = dsa_port_standalone_host_fdb_del(dp, addr, vid);
109 "port %d failed to delete %pM vid %d from fdb: %d\n",
110 dp->index, addr, vid, err);
115 ether_addr_copy(mdb.addr, addr);
118 err = dsa_port_standalone_host_mdb_add(dp, &mdb);
121 "port %d failed to add %pM vid %d to mdb: %d\n",
122 dp->index, addr, vid, err);
127 ether_addr_copy(mdb.addr, addr);
130 err = dsa_port_standalone_host_mdb_del(dp, &mdb);
133 "port %d failed to delete %pM vid %d from mdb: %d\n",
134 dp->index, addr, vid, err);
140 kfree(standalone_work);
143 static int dsa_user_schedule_standalone_work(struct net_device *dev,
144 enum dsa_standalone_event event,
145 const unsigned char *addr,
148 struct dsa_standalone_event_work *standalone_work;
150 standalone_work = kzalloc(sizeof(*standalone_work), GFP_ATOMIC);
151 if (!standalone_work)
154 INIT_WORK(&standalone_work->work, dsa_user_standalone_event_work);
155 standalone_work->event = event;
156 standalone_work->dev = dev;
158 ether_addr_copy(standalone_work->addr, addr);
159 standalone_work->vid = vid;
161 dsa_schedule_work(&standalone_work->work);
166 static int dsa_user_host_vlan_rx_filtering(void *arg, int vid)
168 struct dsa_host_vlan_rx_filtering_ctx *ctx = arg;
170 return dsa_user_schedule_standalone_work(ctx->dev, ctx->event,
174 static int dsa_user_vlan_for_each(struct net_device *dev,
175 int (*cb)(void *arg, int vid), void *arg)
177 struct dsa_port *dp = dsa_user_to_port(dev);
181 lockdep_assert_held(&dev->addr_list_lock);
187 list_for_each_entry(v, &dp->user_vlans, list) {
188 err = cb(arg, v->vid);
196 static int dsa_user_sync_uc(struct net_device *dev,
197 const unsigned char *addr)
199 struct net_device *conduit = dsa_user_to_conduit(dev);
200 struct dsa_port *dp = dsa_user_to_port(dev);
201 struct dsa_host_vlan_rx_filtering_ctx ctx = {
207 dev_uc_add(conduit, addr);
209 if (!dsa_switch_supports_uc_filtering(dp->ds))
212 return dsa_user_vlan_for_each(dev, dsa_user_host_vlan_rx_filtering,
216 static int dsa_user_unsync_uc(struct net_device *dev,
217 const unsigned char *addr)
219 struct net_device *conduit = dsa_user_to_conduit(dev);
220 struct dsa_port *dp = dsa_user_to_port(dev);
221 struct dsa_host_vlan_rx_filtering_ctx ctx = {
227 dev_uc_del(conduit, addr);
229 if (!dsa_switch_supports_uc_filtering(dp->ds))
232 return dsa_user_vlan_for_each(dev, dsa_user_host_vlan_rx_filtering,
236 static int dsa_user_sync_mc(struct net_device *dev,
237 const unsigned char *addr)
239 struct net_device *conduit = dsa_user_to_conduit(dev);
240 struct dsa_port *dp = dsa_user_to_port(dev);
241 struct dsa_host_vlan_rx_filtering_ctx ctx = {
247 dev_mc_add(conduit, addr);
249 if (!dsa_switch_supports_mc_filtering(dp->ds))
252 return dsa_user_vlan_for_each(dev, dsa_user_host_vlan_rx_filtering,
256 static int dsa_user_unsync_mc(struct net_device *dev,
257 const unsigned char *addr)
259 struct net_device *conduit = dsa_user_to_conduit(dev);
260 struct dsa_port *dp = dsa_user_to_port(dev);
261 struct dsa_host_vlan_rx_filtering_ctx ctx = {
267 dev_mc_del(conduit, addr);
269 if (!dsa_switch_supports_mc_filtering(dp->ds))
272 return dsa_user_vlan_for_each(dev, dsa_user_host_vlan_rx_filtering,
276 void dsa_user_sync_ha(struct net_device *dev)
278 struct dsa_port *dp = dsa_user_to_port(dev);
279 struct dsa_switch *ds = dp->ds;
280 struct netdev_hw_addr *ha;
282 netif_addr_lock_bh(dev);
284 netdev_for_each_synced_mc_addr(ha, dev)
285 dsa_user_sync_mc(dev, ha->addr);
287 netdev_for_each_synced_uc_addr(ha, dev)
288 dsa_user_sync_uc(dev, ha->addr);
290 netif_addr_unlock_bh(dev);
292 if (dsa_switch_supports_uc_filtering(ds) ||
293 dsa_switch_supports_mc_filtering(ds))
294 dsa_flush_workqueue();
297 void dsa_user_unsync_ha(struct net_device *dev)
299 struct dsa_port *dp = dsa_user_to_port(dev);
300 struct dsa_switch *ds = dp->ds;
301 struct netdev_hw_addr *ha;
303 netif_addr_lock_bh(dev);
305 netdev_for_each_synced_uc_addr(ha, dev)
306 dsa_user_unsync_uc(dev, ha->addr);
308 netdev_for_each_synced_mc_addr(ha, dev)
309 dsa_user_unsync_mc(dev, ha->addr);
311 netif_addr_unlock_bh(dev);
313 if (dsa_switch_supports_uc_filtering(ds) ||
314 dsa_switch_supports_mc_filtering(ds))
315 dsa_flush_workqueue();
318 /* user mii_bus handling ***************************************************/
319 static int dsa_user_phy_read(struct mii_bus *bus, int addr, int reg)
321 struct dsa_switch *ds = bus->priv;
323 if (ds->phys_mii_mask & (1 << addr))
324 return ds->ops->phy_read(ds, addr, reg);
329 static int dsa_user_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
331 struct dsa_switch *ds = bus->priv;
333 if (ds->phys_mii_mask & (1 << addr))
334 return ds->ops->phy_write(ds, addr, reg, val);
339 void dsa_user_mii_bus_init(struct dsa_switch *ds)
341 ds->user_mii_bus->priv = (void *)ds;
342 ds->user_mii_bus->name = "dsa user smi";
343 ds->user_mii_bus->read = dsa_user_phy_read;
344 ds->user_mii_bus->write = dsa_user_phy_write;
345 snprintf(ds->user_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
346 ds->dst->index, ds->index);
347 ds->user_mii_bus->parent = ds->dev;
348 ds->user_mii_bus->phy_mask = ~ds->phys_mii_mask;
352 /* user device handling ****************************************************/
353 static int dsa_user_get_iflink(const struct net_device *dev)
355 return dsa_user_to_conduit(dev)->ifindex;
358 static int dsa_user_open(struct net_device *dev)
360 struct net_device *conduit = dsa_user_to_conduit(dev);
361 struct dsa_port *dp = dsa_user_to_port(dev);
362 struct dsa_switch *ds = dp->ds;
365 err = dev_open(conduit, NULL);
367 netdev_err(dev, "failed to open conduit %s\n", conduit->name);
371 if (dsa_switch_supports_uc_filtering(ds)) {
372 err = dsa_port_standalone_host_fdb_add(dp, dev->dev_addr, 0);
377 if (!ether_addr_equal(dev->dev_addr, conduit->dev_addr)) {
378 err = dev_uc_add(conduit, dev->dev_addr);
383 err = dsa_port_enable_rt(dp, dev->phydev);
390 if (!ether_addr_equal(dev->dev_addr, conduit->dev_addr))
391 dev_uc_del(conduit, dev->dev_addr);
393 if (dsa_switch_supports_uc_filtering(ds))
394 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0);
399 static int dsa_user_close(struct net_device *dev)
401 struct net_device *conduit = dsa_user_to_conduit(dev);
402 struct dsa_port *dp = dsa_user_to_port(dev);
403 struct dsa_switch *ds = dp->ds;
405 dsa_port_disable_rt(dp);
407 if (!ether_addr_equal(dev->dev_addr, conduit->dev_addr))
408 dev_uc_del(conduit, dev->dev_addr);
410 if (dsa_switch_supports_uc_filtering(ds))
411 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0);
416 static void dsa_user_manage_host_flood(struct net_device *dev)
418 bool mc = dev->flags & (IFF_PROMISC | IFF_ALLMULTI);
419 struct dsa_port *dp = dsa_user_to_port(dev);
420 bool uc = dev->flags & IFF_PROMISC;
422 dsa_port_set_host_flood(dp, uc, mc);
425 static void dsa_user_change_rx_flags(struct net_device *dev, int change)
427 struct net_device *conduit = dsa_user_to_conduit(dev);
428 struct dsa_port *dp = dsa_user_to_port(dev);
429 struct dsa_switch *ds = dp->ds;
431 if (change & IFF_ALLMULTI)
432 dev_set_allmulti(conduit,
433 dev->flags & IFF_ALLMULTI ? 1 : -1);
434 if (change & IFF_PROMISC)
435 dev_set_promiscuity(conduit,
436 dev->flags & IFF_PROMISC ? 1 : -1);
438 if (dsa_switch_supports_uc_filtering(ds) &&
439 dsa_switch_supports_mc_filtering(ds))
440 dsa_user_manage_host_flood(dev);
443 static void dsa_user_set_rx_mode(struct net_device *dev)
445 __dev_mc_sync(dev, dsa_user_sync_mc, dsa_user_unsync_mc);
446 __dev_uc_sync(dev, dsa_user_sync_uc, dsa_user_unsync_uc);
449 static int dsa_user_set_mac_address(struct net_device *dev, void *a)
451 struct net_device *conduit = dsa_user_to_conduit(dev);
452 struct dsa_port *dp = dsa_user_to_port(dev);
453 struct dsa_switch *ds = dp->ds;
454 struct sockaddr *addr = a;
457 if (!is_valid_ether_addr(addr->sa_data))
458 return -EADDRNOTAVAIL;
460 if (ds->ops->port_set_mac_address) {
461 err = ds->ops->port_set_mac_address(ds, dp->index,
467 /* If the port is down, the address isn't synced yet to hardware or
468 * to the DSA conduit, so there is nothing to change.
470 if (!(dev->flags & IFF_UP))
471 goto out_change_dev_addr;
473 if (dsa_switch_supports_uc_filtering(ds)) {
474 err = dsa_port_standalone_host_fdb_add(dp, addr->sa_data, 0);
479 if (!ether_addr_equal(addr->sa_data, conduit->dev_addr)) {
480 err = dev_uc_add(conduit, addr->sa_data);
485 if (!ether_addr_equal(dev->dev_addr, conduit->dev_addr))
486 dev_uc_del(conduit, dev->dev_addr);
488 if (dsa_switch_supports_uc_filtering(ds))
489 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0);
492 eth_hw_addr_set(dev, addr->sa_data);
497 if (dsa_switch_supports_uc_filtering(ds))
498 dsa_port_standalone_host_fdb_del(dp, addr->sa_data, 0);
503 struct dsa_user_dump_ctx {
504 struct net_device *dev;
506 struct netlink_callback *cb;
511 dsa_user_port_fdb_do_dump(const unsigned char *addr, u16 vid,
512 bool is_static, void *data)
514 struct dsa_user_dump_ctx *dump = data;
515 u32 portid = NETLINK_CB(dump->cb->skb).portid;
516 u32 seq = dump->cb->nlh->nlmsg_seq;
517 struct nlmsghdr *nlh;
520 if (dump->idx < dump->cb->args[2])
523 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
524 sizeof(*ndm), NLM_F_MULTI);
528 ndm = nlmsg_data(nlh);
529 ndm->ndm_family = AF_BRIDGE;
532 ndm->ndm_flags = NTF_SELF;
534 ndm->ndm_ifindex = dump->dev->ifindex;
535 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
537 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
538 goto nla_put_failure;
540 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
541 goto nla_put_failure;
543 nlmsg_end(dump->skb, nlh);
550 nlmsg_cancel(dump->skb, nlh);
555 dsa_user_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
556 struct net_device *dev, struct net_device *filter_dev,
559 struct dsa_port *dp = dsa_user_to_port(dev);
560 struct dsa_user_dump_ctx dump = {
568 err = dsa_port_fdb_dump(dp, dsa_user_port_fdb_do_dump, &dump);
574 static int dsa_user_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
576 struct dsa_user_priv *p = netdev_priv(dev);
577 struct dsa_switch *ds = p->dp->ds;
578 int port = p->dp->index;
580 /* Pass through to switch driver if it supports timestamping */
583 if (ds->ops->port_hwtstamp_get)
584 return ds->ops->port_hwtstamp_get(ds, port, ifr);
587 if (ds->ops->port_hwtstamp_set)
588 return ds->ops->port_hwtstamp_set(ds, port, ifr);
592 return phylink_mii_ioctl(p->dp->pl, ifr, cmd);
595 static int dsa_user_port_attr_set(struct net_device *dev, const void *ctx,
596 const struct switchdev_attr *attr,
597 struct netlink_ext_ack *extack)
599 struct dsa_port *dp = dsa_user_to_port(dev);
602 if (ctx && ctx != dp)
606 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
607 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
610 ret = dsa_port_set_state(dp, attr->u.stp_state, true);
612 case SWITCHDEV_ATTR_ID_PORT_MST_STATE:
613 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
616 ret = dsa_port_set_mst_state(dp, &attr->u.mst_state, extack);
618 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
619 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
622 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
625 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
626 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
629 ret = dsa_port_ageing_time(dp, attr->u.ageing_time);
631 case SWITCHDEV_ATTR_ID_BRIDGE_MST:
632 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
635 ret = dsa_port_mst_enable(dp, attr->u.mst, extack);
637 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
638 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
641 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags,
644 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
645 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
648 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack);
650 case SWITCHDEV_ATTR_ID_VLAN_MSTI:
651 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
654 ret = dsa_port_vlan_msti(dp, &attr->u.vlan_msti);
664 /* Must be called under rcu_read_lock() */
666 dsa_user_vlan_check_for_8021q_uppers(struct net_device *user,
667 const struct switchdev_obj_port_vlan *vlan)
669 struct net_device *upper_dev;
670 struct list_head *iter;
672 netdev_for_each_upper_dev_rcu(user, upper_dev, iter) {
675 if (!is_vlan_dev(upper_dev))
678 vid = vlan_dev_vlan_id(upper_dev);
679 if (vid == vlan->vid)
686 static int dsa_user_vlan_add(struct net_device *dev,
687 const struct switchdev_obj *obj,
688 struct netlink_ext_ack *extack)
690 struct dsa_port *dp = dsa_user_to_port(dev);
691 struct switchdev_obj_port_vlan *vlan;
694 if (dsa_port_skip_vlan_configuration(dp)) {
695 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN");
699 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
701 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with
704 if (br_vlan_enabled(dsa_port_bridge_dev_get(dp))) {
706 err = dsa_user_vlan_check_for_8021q_uppers(dev, vlan);
709 NL_SET_ERR_MSG_MOD(extack,
710 "Port already has a VLAN upper with this VID");
715 return dsa_port_vlan_add(dp, vlan, extack);
718 /* Offload a VLAN installed on the bridge or on a foreign interface by
719 * installing it as a VLAN towards the CPU port.
721 static int dsa_user_host_vlan_add(struct net_device *dev,
722 const struct switchdev_obj *obj,
723 struct netlink_ext_ack *extack)
725 struct dsa_port *dp = dsa_user_to_port(dev);
726 struct switchdev_obj_port_vlan vlan;
728 /* Do nothing if this is a software bridge */
732 if (dsa_port_skip_vlan_configuration(dp)) {
733 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN");
737 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj);
739 /* Even though drivers often handle CPU membership in special ways,
740 * it doesn't make sense to program a PVID, so clear this flag.
742 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID;
744 return dsa_port_host_vlan_add(dp, &vlan, extack);
747 static int dsa_user_port_obj_add(struct net_device *dev, const void *ctx,
748 const struct switchdev_obj *obj,
749 struct netlink_ext_ack *extack)
751 struct dsa_port *dp = dsa_user_to_port(dev);
754 if (ctx && ctx != dp)
758 case SWITCHDEV_OBJ_ID_PORT_MDB:
759 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
762 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
764 case SWITCHDEV_OBJ_ID_HOST_MDB:
765 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
768 err = dsa_port_bridge_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
770 case SWITCHDEV_OBJ_ID_PORT_VLAN:
771 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev))
772 err = dsa_user_vlan_add(dev, obj, extack);
774 err = dsa_user_host_vlan_add(dev, obj, extack);
776 case SWITCHDEV_OBJ_ID_MRP:
777 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
780 err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj));
782 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
783 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
786 err = dsa_port_mrp_add_ring_role(dp,
787 SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
797 static int dsa_user_vlan_del(struct net_device *dev,
798 const struct switchdev_obj *obj)
800 struct dsa_port *dp = dsa_user_to_port(dev);
801 struct switchdev_obj_port_vlan *vlan;
803 if (dsa_port_skip_vlan_configuration(dp))
806 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
808 return dsa_port_vlan_del(dp, vlan);
811 static int dsa_user_host_vlan_del(struct net_device *dev,
812 const struct switchdev_obj *obj)
814 struct dsa_port *dp = dsa_user_to_port(dev);
815 struct switchdev_obj_port_vlan *vlan;
817 /* Do nothing if this is a software bridge */
821 if (dsa_port_skip_vlan_configuration(dp))
824 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
826 return dsa_port_host_vlan_del(dp, vlan);
829 static int dsa_user_port_obj_del(struct net_device *dev, const void *ctx,
830 const struct switchdev_obj *obj)
832 struct dsa_port *dp = dsa_user_to_port(dev);
835 if (ctx && ctx != dp)
839 case SWITCHDEV_OBJ_ID_PORT_MDB:
840 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
843 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
845 case SWITCHDEV_OBJ_ID_HOST_MDB:
846 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
849 err = dsa_port_bridge_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
851 case SWITCHDEV_OBJ_ID_PORT_VLAN:
852 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev))
853 err = dsa_user_vlan_del(dev, obj);
855 err = dsa_user_host_vlan_del(dev, obj);
857 case SWITCHDEV_OBJ_ID_MRP:
858 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
861 err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj));
863 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
864 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
867 err = dsa_port_mrp_del_ring_role(dp,
868 SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
878 static inline netdev_tx_t dsa_user_netpoll_send_skb(struct net_device *dev,
881 #ifdef CONFIG_NET_POLL_CONTROLLER
882 struct dsa_user_priv *p = netdev_priv(dev);
884 return netpoll_send_skb(p->netpoll, skb);
891 static void dsa_skb_tx_timestamp(struct dsa_user_priv *p,
894 struct dsa_switch *ds = p->dp->ds;
896 if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))
899 if (!ds->ops->port_txtstamp)
902 ds->ops->port_txtstamp(ds, p->dp->index, skb);
905 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
907 /* SKB for netpoll still need to be mangled with the protocol-specific
908 * tag to be successfully transmitted
910 if (unlikely(netpoll_tx_running(dev)))
911 return dsa_user_netpoll_send_skb(dev, skb);
913 /* Queue the SKB for transmission on the parent interface, but
914 * do not modify its EtherType
916 skb->dev = dsa_user_to_conduit(dev);
921 EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
923 static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev)
925 int needed_headroom = dev->needed_headroom;
926 int needed_tailroom = dev->needed_tailroom;
928 /* For tail taggers, we need to pad short frames ourselves, to ensure
929 * that the tail tag does not fail at its role of being at the end of
930 * the packet, once the conduit interface pads the frame. Account for
931 * that pad length here, and pad later.
933 if (unlikely(needed_tailroom && skb->len < ETH_ZLEN))
934 needed_tailroom += ETH_ZLEN - skb->len;
935 /* skb_headroom() returns unsigned int... */
936 needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0);
937 needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0);
939 if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb)))
940 /* No reallocation needed, yay! */
943 return pskb_expand_head(skb, needed_headroom, needed_tailroom,
947 static netdev_tx_t dsa_user_xmit(struct sk_buff *skb, struct net_device *dev)
949 struct dsa_user_priv *p = netdev_priv(dev);
950 struct sk_buff *nskb;
952 dev_sw_netstats_tx_add(dev, 1, skb->len);
954 memset(skb->cb, 0, sizeof(skb->cb));
956 /* Handle tx timestamp if any */
957 dsa_skb_tx_timestamp(p, skb);
959 if (dsa_realloc_skb(skb, dev)) {
960 dev_kfree_skb_any(skb);
964 /* needed_tailroom should still be 'warm' in the cache line from
965 * dsa_realloc_skb(), which has also ensured that padding is safe.
967 if (dev->needed_tailroom)
970 /* Transmit function may have to reallocate the original SKB,
971 * in which case it must have freed it. Only free it here on error.
973 nskb = p->xmit(skb, dev);
979 return dsa_enqueue_skb(nskb, dev);
982 /* ethtool operations *******************************************************/
984 static void dsa_user_get_drvinfo(struct net_device *dev,
985 struct ethtool_drvinfo *drvinfo)
987 strscpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
988 strscpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
989 strscpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
992 static int dsa_user_get_regs_len(struct net_device *dev)
994 struct dsa_port *dp = dsa_user_to_port(dev);
995 struct dsa_switch *ds = dp->ds;
997 if (ds->ops->get_regs_len)
998 return ds->ops->get_regs_len(ds, dp->index);
1004 dsa_user_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
1006 struct dsa_port *dp = dsa_user_to_port(dev);
1007 struct dsa_switch *ds = dp->ds;
1009 if (ds->ops->get_regs)
1010 ds->ops->get_regs(ds, dp->index, regs, _p);
1013 static int dsa_user_nway_reset(struct net_device *dev)
1015 struct dsa_port *dp = dsa_user_to_port(dev);
1017 return phylink_ethtool_nway_reset(dp->pl);
1020 static int dsa_user_get_eeprom_len(struct net_device *dev)
1022 struct dsa_port *dp = dsa_user_to_port(dev);
1023 struct dsa_switch *ds = dp->ds;
1025 if (ds->cd && ds->cd->eeprom_len)
1026 return ds->cd->eeprom_len;
1028 if (ds->ops->get_eeprom_len)
1029 return ds->ops->get_eeprom_len(ds);
1034 static int dsa_user_get_eeprom(struct net_device *dev,
1035 struct ethtool_eeprom *eeprom, u8 *data)
1037 struct dsa_port *dp = dsa_user_to_port(dev);
1038 struct dsa_switch *ds = dp->ds;
1040 if (ds->ops->get_eeprom)
1041 return ds->ops->get_eeprom(ds, eeprom, data);
1046 static int dsa_user_set_eeprom(struct net_device *dev,
1047 struct ethtool_eeprom *eeprom, u8 *data)
1049 struct dsa_port *dp = dsa_user_to_port(dev);
1050 struct dsa_switch *ds = dp->ds;
1052 if (ds->ops->set_eeprom)
1053 return ds->ops->set_eeprom(ds, eeprom, data);
1058 static void dsa_user_get_strings(struct net_device *dev,
1059 uint32_t stringset, uint8_t *data)
1061 struct dsa_port *dp = dsa_user_to_port(dev);
1062 struct dsa_switch *ds = dp->ds;
1064 if (stringset == ETH_SS_STATS) {
1065 int len = ETH_GSTRING_LEN;
1067 strscpy_pad(data, "tx_packets", len);
1068 strscpy_pad(data + len, "tx_bytes", len);
1069 strscpy_pad(data + 2 * len, "rx_packets", len);
1070 strscpy_pad(data + 3 * len, "rx_bytes", len);
1071 if (ds->ops->get_strings)
1072 ds->ops->get_strings(ds, dp->index, stringset,
1074 } else if (stringset == ETH_SS_TEST) {
1075 net_selftest_get_strings(data);
1080 static void dsa_user_get_ethtool_stats(struct net_device *dev,
1081 struct ethtool_stats *stats,
1084 struct dsa_port *dp = dsa_user_to_port(dev);
1085 struct dsa_switch *ds = dp->ds;
1086 struct pcpu_sw_netstats *s;
1090 for_each_possible_cpu(i) {
1091 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
1093 s = per_cpu_ptr(dev->tstats, i);
1095 start = u64_stats_fetch_begin(&s->syncp);
1096 tx_packets = u64_stats_read(&s->tx_packets);
1097 tx_bytes = u64_stats_read(&s->tx_bytes);
1098 rx_packets = u64_stats_read(&s->rx_packets);
1099 rx_bytes = u64_stats_read(&s->rx_bytes);
1100 } while (u64_stats_fetch_retry(&s->syncp, start));
1101 data[0] += tx_packets;
1102 data[1] += tx_bytes;
1103 data[2] += rx_packets;
1104 data[3] += rx_bytes;
1106 if (ds->ops->get_ethtool_stats)
1107 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
1110 static int dsa_user_get_sset_count(struct net_device *dev, int sset)
1112 struct dsa_port *dp = dsa_user_to_port(dev);
1113 struct dsa_switch *ds = dp->ds;
1115 if (sset == ETH_SS_STATS) {
1118 if (ds->ops->get_sset_count) {
1119 count = ds->ops->get_sset_count(ds, dp->index, sset);
1125 } else if (sset == ETH_SS_TEST) {
1126 return net_selftest_get_count();
1132 static void dsa_user_get_eth_phy_stats(struct net_device *dev,
1133 struct ethtool_eth_phy_stats *phy_stats)
1135 struct dsa_port *dp = dsa_user_to_port(dev);
1136 struct dsa_switch *ds = dp->ds;
1138 if (ds->ops->get_eth_phy_stats)
1139 ds->ops->get_eth_phy_stats(ds, dp->index, phy_stats);
1142 static void dsa_user_get_eth_mac_stats(struct net_device *dev,
1143 struct ethtool_eth_mac_stats *mac_stats)
1145 struct dsa_port *dp = dsa_user_to_port(dev);
1146 struct dsa_switch *ds = dp->ds;
1148 if (ds->ops->get_eth_mac_stats)
1149 ds->ops->get_eth_mac_stats(ds, dp->index, mac_stats);
1153 dsa_user_get_eth_ctrl_stats(struct net_device *dev,
1154 struct ethtool_eth_ctrl_stats *ctrl_stats)
1156 struct dsa_port *dp = dsa_user_to_port(dev);
1157 struct dsa_switch *ds = dp->ds;
1159 if (ds->ops->get_eth_ctrl_stats)
1160 ds->ops->get_eth_ctrl_stats(ds, dp->index, ctrl_stats);
1164 dsa_user_get_rmon_stats(struct net_device *dev,
1165 struct ethtool_rmon_stats *rmon_stats,
1166 const struct ethtool_rmon_hist_range **ranges)
1168 struct dsa_port *dp = dsa_user_to_port(dev);
1169 struct dsa_switch *ds = dp->ds;
1171 if (ds->ops->get_rmon_stats)
1172 ds->ops->get_rmon_stats(ds, dp->index, rmon_stats, ranges);
1175 static void dsa_user_net_selftest(struct net_device *ndev,
1176 struct ethtool_test *etest, u64 *buf)
1178 struct dsa_port *dp = dsa_user_to_port(ndev);
1179 struct dsa_switch *ds = dp->ds;
1181 if (ds->ops->self_test) {
1182 ds->ops->self_test(ds, dp->index, etest, buf);
1186 net_selftest(ndev, etest, buf);
1189 static int dsa_user_get_mm(struct net_device *dev,
1190 struct ethtool_mm_state *state)
1192 struct dsa_port *dp = dsa_user_to_port(dev);
1193 struct dsa_switch *ds = dp->ds;
1195 if (!ds->ops->get_mm)
1198 return ds->ops->get_mm(ds, dp->index, state);
1201 static int dsa_user_set_mm(struct net_device *dev, struct ethtool_mm_cfg *cfg,
1202 struct netlink_ext_ack *extack)
1204 struct dsa_port *dp = dsa_user_to_port(dev);
1205 struct dsa_switch *ds = dp->ds;
1207 if (!ds->ops->set_mm)
1210 return ds->ops->set_mm(ds, dp->index, cfg, extack);
1213 static void dsa_user_get_mm_stats(struct net_device *dev,
1214 struct ethtool_mm_stats *stats)
1216 struct dsa_port *dp = dsa_user_to_port(dev);
1217 struct dsa_switch *ds = dp->ds;
1219 if (ds->ops->get_mm_stats)
1220 ds->ops->get_mm_stats(ds, dp->index, stats);
1223 static void dsa_user_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
1225 struct dsa_port *dp = dsa_user_to_port(dev);
1226 struct dsa_switch *ds = dp->ds;
1228 phylink_ethtool_get_wol(dp->pl, w);
1230 if (ds->ops->get_wol)
1231 ds->ops->get_wol(ds, dp->index, w);
1234 static int dsa_user_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
1236 struct dsa_port *dp = dsa_user_to_port(dev);
1237 struct dsa_switch *ds = dp->ds;
1238 int ret = -EOPNOTSUPP;
1240 phylink_ethtool_set_wol(dp->pl, w);
1242 if (ds->ops->set_wol)
1243 ret = ds->ops->set_wol(ds, dp->index, w);
1248 static int dsa_user_set_eee(struct net_device *dev, struct ethtool_eee *e)
1250 struct dsa_port *dp = dsa_user_to_port(dev);
1251 struct dsa_switch *ds = dp->ds;
1254 /* Port's PHY and MAC both need to be EEE capable */
1255 if (!dev->phydev || !dp->pl)
1258 if (!ds->ops->set_mac_eee)
1261 ret = ds->ops->set_mac_eee(ds, dp->index, e);
1265 return phylink_ethtool_set_eee(dp->pl, e);
1268 static int dsa_user_get_eee(struct net_device *dev, struct ethtool_eee *e)
1270 struct dsa_port *dp = dsa_user_to_port(dev);
1271 struct dsa_switch *ds = dp->ds;
1274 /* Port's PHY and MAC both need to be EEE capable */
1275 if (!dev->phydev || !dp->pl)
1278 if (!ds->ops->get_mac_eee)
1281 ret = ds->ops->get_mac_eee(ds, dp->index, e);
1285 return phylink_ethtool_get_eee(dp->pl, e);
1288 static int dsa_user_get_link_ksettings(struct net_device *dev,
1289 struct ethtool_link_ksettings *cmd)
1291 struct dsa_port *dp = dsa_user_to_port(dev);
1293 return phylink_ethtool_ksettings_get(dp->pl, cmd);
1296 static int dsa_user_set_link_ksettings(struct net_device *dev,
1297 const struct ethtool_link_ksettings *cmd)
1299 struct dsa_port *dp = dsa_user_to_port(dev);
1301 return phylink_ethtool_ksettings_set(dp->pl, cmd);
1304 static void dsa_user_get_pause_stats(struct net_device *dev,
1305 struct ethtool_pause_stats *pause_stats)
1307 struct dsa_port *dp = dsa_user_to_port(dev);
1308 struct dsa_switch *ds = dp->ds;
1310 if (ds->ops->get_pause_stats)
1311 ds->ops->get_pause_stats(ds, dp->index, pause_stats);
1314 static void dsa_user_get_pauseparam(struct net_device *dev,
1315 struct ethtool_pauseparam *pause)
1317 struct dsa_port *dp = dsa_user_to_port(dev);
1319 phylink_ethtool_get_pauseparam(dp->pl, pause);
1322 static int dsa_user_set_pauseparam(struct net_device *dev,
1323 struct ethtool_pauseparam *pause)
1325 struct dsa_port *dp = dsa_user_to_port(dev);
1327 return phylink_ethtool_set_pauseparam(dp->pl, pause);
1330 #ifdef CONFIG_NET_POLL_CONTROLLER
1331 static int dsa_user_netpoll_setup(struct net_device *dev,
1332 struct netpoll_info *ni)
1334 struct net_device *conduit = dsa_user_to_conduit(dev);
1335 struct dsa_user_priv *p = netdev_priv(dev);
1336 struct netpoll *netpoll;
1339 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
1343 err = __netpoll_setup(netpoll, conduit);
1349 p->netpoll = netpoll;
1354 static void dsa_user_netpoll_cleanup(struct net_device *dev)
1356 struct dsa_user_priv *p = netdev_priv(dev);
1357 struct netpoll *netpoll = p->netpoll;
1364 __netpoll_free(netpoll);
1367 static void dsa_user_poll_controller(struct net_device *dev)
1372 static struct dsa_mall_tc_entry *
1373 dsa_user_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
1375 struct dsa_user_priv *p = netdev_priv(dev);
1376 struct dsa_mall_tc_entry *mall_tc_entry;
1378 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
1379 if (mall_tc_entry->cookie == cookie)
1380 return mall_tc_entry;
1386 dsa_user_add_cls_matchall_mirred(struct net_device *dev,
1387 struct tc_cls_matchall_offload *cls,
1390 struct netlink_ext_ack *extack = cls->common.extack;
1391 struct dsa_port *dp = dsa_user_to_port(dev);
1392 struct dsa_user_priv *p = netdev_priv(dev);
1393 struct dsa_mall_mirror_tc_entry *mirror;
1394 struct dsa_mall_tc_entry *mall_tc_entry;
1395 struct dsa_switch *ds = dp->ds;
1396 struct flow_action_entry *act;
1397 struct dsa_port *to_dp;
1400 if (!ds->ops->port_mirror_add)
1403 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
1404 cls->common.extack))
1407 act = &cls->rule->action.entries[0];
1412 if (!dsa_user_dev_check(act->dev))
1415 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1419 mall_tc_entry->cookie = cls->cookie;
1420 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
1421 mirror = &mall_tc_entry->mirror;
1423 to_dp = dsa_user_to_port(act->dev);
1425 mirror->to_local_port = to_dp->index;
1426 mirror->ingress = ingress;
1428 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress, extack);
1430 kfree(mall_tc_entry);
1434 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
1440 dsa_user_add_cls_matchall_police(struct net_device *dev,
1441 struct tc_cls_matchall_offload *cls,
1444 struct netlink_ext_ack *extack = cls->common.extack;
1445 struct dsa_port *dp = dsa_user_to_port(dev);
1446 struct dsa_user_priv *p = netdev_priv(dev);
1447 struct dsa_mall_policer_tc_entry *policer;
1448 struct dsa_mall_tc_entry *mall_tc_entry;
1449 struct dsa_switch *ds = dp->ds;
1450 struct flow_action_entry *act;
1453 if (!ds->ops->port_policer_add) {
1454 NL_SET_ERR_MSG_MOD(extack,
1455 "Policing offload not implemented");
1460 NL_SET_ERR_MSG_MOD(extack,
1461 "Only supported on ingress qdisc");
1465 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
1466 cls->common.extack))
1469 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) {
1470 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) {
1471 NL_SET_ERR_MSG_MOD(extack,
1472 "Only one port policer allowed");
1477 act = &cls->rule->action.entries[0];
1479 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1483 mall_tc_entry->cookie = cls->cookie;
1484 mall_tc_entry->type = DSA_PORT_MALL_POLICER;
1485 policer = &mall_tc_entry->policer;
1486 policer->rate_bytes_per_sec = act->police.rate_bytes_ps;
1487 policer->burst = act->police.burst;
1489 err = ds->ops->port_policer_add(ds, dp->index, policer);
1491 kfree(mall_tc_entry);
1495 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
1500 static int dsa_user_add_cls_matchall(struct net_device *dev,
1501 struct tc_cls_matchall_offload *cls,
1504 int err = -EOPNOTSUPP;
1506 if (cls->common.protocol == htons(ETH_P_ALL) &&
1507 flow_offload_has_one_action(&cls->rule->action) &&
1508 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED)
1509 err = dsa_user_add_cls_matchall_mirred(dev, cls, ingress);
1510 else if (flow_offload_has_one_action(&cls->rule->action) &&
1511 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE)
1512 err = dsa_user_add_cls_matchall_police(dev, cls, ingress);
1517 static void dsa_user_del_cls_matchall(struct net_device *dev,
1518 struct tc_cls_matchall_offload *cls)
1520 struct dsa_port *dp = dsa_user_to_port(dev);
1521 struct dsa_mall_tc_entry *mall_tc_entry;
1522 struct dsa_switch *ds = dp->ds;
1524 mall_tc_entry = dsa_user_mall_tc_entry_find(dev, cls->cookie);
1528 list_del(&mall_tc_entry->list);
1530 switch (mall_tc_entry->type) {
1531 case DSA_PORT_MALL_MIRROR:
1532 if (ds->ops->port_mirror_del)
1533 ds->ops->port_mirror_del(ds, dp->index,
1534 &mall_tc_entry->mirror);
1536 case DSA_PORT_MALL_POLICER:
1537 if (ds->ops->port_policer_del)
1538 ds->ops->port_policer_del(ds, dp->index);
1544 kfree(mall_tc_entry);
1547 static int dsa_user_setup_tc_cls_matchall(struct net_device *dev,
1548 struct tc_cls_matchall_offload *cls,
1551 if (cls->common.chain_index)
1554 switch (cls->command) {
1555 case TC_CLSMATCHALL_REPLACE:
1556 return dsa_user_add_cls_matchall(dev, cls, ingress);
1557 case TC_CLSMATCHALL_DESTROY:
1558 dsa_user_del_cls_matchall(dev, cls);
1565 static int dsa_user_add_cls_flower(struct net_device *dev,
1566 struct flow_cls_offload *cls,
1569 struct dsa_port *dp = dsa_user_to_port(dev);
1570 struct dsa_switch *ds = dp->ds;
1571 int port = dp->index;
1573 if (!ds->ops->cls_flower_add)
1576 return ds->ops->cls_flower_add(ds, port, cls, ingress);
1579 static int dsa_user_del_cls_flower(struct net_device *dev,
1580 struct flow_cls_offload *cls,
1583 struct dsa_port *dp = dsa_user_to_port(dev);
1584 struct dsa_switch *ds = dp->ds;
1585 int port = dp->index;
1587 if (!ds->ops->cls_flower_del)
1590 return ds->ops->cls_flower_del(ds, port, cls, ingress);
1593 static int dsa_user_stats_cls_flower(struct net_device *dev,
1594 struct flow_cls_offload *cls,
1597 struct dsa_port *dp = dsa_user_to_port(dev);
1598 struct dsa_switch *ds = dp->ds;
1599 int port = dp->index;
1601 if (!ds->ops->cls_flower_stats)
1604 return ds->ops->cls_flower_stats(ds, port, cls, ingress);
1607 static int dsa_user_setup_tc_cls_flower(struct net_device *dev,
1608 struct flow_cls_offload *cls,
1611 switch (cls->command) {
1612 case FLOW_CLS_REPLACE:
1613 return dsa_user_add_cls_flower(dev, cls, ingress);
1614 case FLOW_CLS_DESTROY:
1615 return dsa_user_del_cls_flower(dev, cls, ingress);
1616 case FLOW_CLS_STATS:
1617 return dsa_user_stats_cls_flower(dev, cls, ingress);
1623 static int dsa_user_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
1624 void *cb_priv, bool ingress)
1626 struct net_device *dev = cb_priv;
1628 if (!tc_can_offload(dev))
1632 case TC_SETUP_CLSMATCHALL:
1633 return dsa_user_setup_tc_cls_matchall(dev, type_data, ingress);
1634 case TC_SETUP_CLSFLOWER:
1635 return dsa_user_setup_tc_cls_flower(dev, type_data, ingress);
1641 static int dsa_user_setup_tc_block_cb_ig(enum tc_setup_type type,
1642 void *type_data, void *cb_priv)
1644 return dsa_user_setup_tc_block_cb(type, type_data, cb_priv, true);
1647 static int dsa_user_setup_tc_block_cb_eg(enum tc_setup_type type,
1648 void *type_data, void *cb_priv)
1650 return dsa_user_setup_tc_block_cb(type, type_data, cb_priv, false);
1653 static LIST_HEAD(dsa_user_block_cb_list);
1655 static int dsa_user_setup_tc_block(struct net_device *dev,
1656 struct flow_block_offload *f)
1658 struct flow_block_cb *block_cb;
1659 flow_setup_cb_t *cb;
1661 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
1662 cb = dsa_user_setup_tc_block_cb_ig;
1663 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
1664 cb = dsa_user_setup_tc_block_cb_eg;
1668 f->driver_block_list = &dsa_user_block_cb_list;
1670 switch (f->command) {
1671 case FLOW_BLOCK_BIND:
1672 if (flow_block_cb_is_busy(cb, dev, &dsa_user_block_cb_list))
1675 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL);
1676 if (IS_ERR(block_cb))
1677 return PTR_ERR(block_cb);
1679 flow_block_cb_add(block_cb, f);
1680 list_add_tail(&block_cb->driver_list, &dsa_user_block_cb_list);
1682 case FLOW_BLOCK_UNBIND:
1683 block_cb = flow_block_cb_lookup(f->block, cb, dev);
1687 flow_block_cb_remove(block_cb, f);
1688 list_del(&block_cb->driver_list);
1695 static int dsa_user_setup_ft_block(struct dsa_switch *ds, int port,
1698 struct net_device *conduit = dsa_port_to_conduit(dsa_to_port(ds, port));
1700 if (!conduit->netdev_ops->ndo_setup_tc)
1703 return conduit->netdev_ops->ndo_setup_tc(conduit, TC_SETUP_FT, type_data);
1706 static int dsa_user_setup_tc(struct net_device *dev, enum tc_setup_type type,
1709 struct dsa_port *dp = dsa_user_to_port(dev);
1710 struct dsa_switch *ds = dp->ds;
1713 case TC_SETUP_BLOCK:
1714 return dsa_user_setup_tc_block(dev, type_data);
1716 return dsa_user_setup_ft_block(ds, dp->index, type_data);
1721 if (!ds->ops->port_setup_tc)
1724 return ds->ops->port_setup_tc(ds, dp->index, type, type_data);
1727 static int dsa_user_get_rxnfc(struct net_device *dev,
1728 struct ethtool_rxnfc *nfc, u32 *rule_locs)
1730 struct dsa_port *dp = dsa_user_to_port(dev);
1731 struct dsa_switch *ds = dp->ds;
1733 if (!ds->ops->get_rxnfc)
1736 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
1739 static int dsa_user_set_rxnfc(struct net_device *dev,
1740 struct ethtool_rxnfc *nfc)
1742 struct dsa_port *dp = dsa_user_to_port(dev);
1743 struct dsa_switch *ds = dp->ds;
1745 if (!ds->ops->set_rxnfc)
1748 return ds->ops->set_rxnfc(ds, dp->index, nfc);
1751 static int dsa_user_get_ts_info(struct net_device *dev,
1752 struct ethtool_ts_info *ts)
1754 struct dsa_user_priv *p = netdev_priv(dev);
1755 struct dsa_switch *ds = p->dp->ds;
1757 if (!ds->ops->get_ts_info)
1760 return ds->ops->get_ts_info(ds, p->dp->index, ts);
1763 static int dsa_user_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
1766 struct dsa_port *dp = dsa_user_to_port(dev);
1767 struct switchdev_obj_port_vlan vlan = {
1768 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
1770 /* This API only allows programming tagged, non-PVID VIDs */
1773 struct netlink_ext_ack extack = {0};
1774 struct dsa_switch *ds = dp->ds;
1775 struct netdev_hw_addr *ha;
1780 ret = dsa_port_vlan_add(dp, &vlan, &extack);
1783 netdev_err(dev, "%s\n", extack._msg);
1787 /* And CPU port... */
1788 ret = dsa_port_host_vlan_add(dp, &vlan, &extack);
1791 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index,
1796 if (!dsa_switch_supports_uc_filtering(ds) &&
1797 !dsa_switch_supports_mc_filtering(ds))
1800 v = kzalloc(sizeof(*v), GFP_KERNEL);
1806 netif_addr_lock_bh(dev);
1809 list_add_tail(&v->list, &dp->user_vlans);
1811 if (dsa_switch_supports_mc_filtering(ds)) {
1812 netdev_for_each_synced_mc_addr(ha, dev) {
1813 dsa_user_schedule_standalone_work(dev, DSA_MC_ADD,
1818 if (dsa_switch_supports_uc_filtering(ds)) {
1819 netdev_for_each_synced_uc_addr(ha, dev) {
1820 dsa_user_schedule_standalone_work(dev, DSA_UC_ADD,
1825 netif_addr_unlock_bh(dev);
1827 dsa_flush_workqueue();
1832 dsa_port_host_vlan_del(dp, &vlan);
1833 dsa_port_vlan_del(dp, &vlan);
1838 static int dsa_user_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
1841 struct dsa_port *dp = dsa_user_to_port(dev);
1842 struct switchdev_obj_port_vlan vlan = {
1844 /* This API only allows programming tagged, non-PVID VIDs */
1847 struct dsa_switch *ds = dp->ds;
1848 struct netdev_hw_addr *ha;
1852 err = dsa_port_vlan_del(dp, &vlan);
1856 err = dsa_port_host_vlan_del(dp, &vlan);
1860 if (!dsa_switch_supports_uc_filtering(ds) &&
1861 !dsa_switch_supports_mc_filtering(ds))
1864 netif_addr_lock_bh(dev);
1866 v = dsa_vlan_find(&dp->user_vlans, &vlan);
1868 netif_addr_unlock_bh(dev);
1875 if (dsa_switch_supports_mc_filtering(ds)) {
1876 netdev_for_each_synced_mc_addr(ha, dev) {
1877 dsa_user_schedule_standalone_work(dev, DSA_MC_DEL,
1882 if (dsa_switch_supports_uc_filtering(ds)) {
1883 netdev_for_each_synced_uc_addr(ha, dev) {
1884 dsa_user_schedule_standalone_work(dev, DSA_UC_DEL,
1889 netif_addr_unlock_bh(dev);
1891 dsa_flush_workqueue();
1896 static int dsa_user_restore_vlan(struct net_device *vdev, int vid, void *arg)
1898 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q);
1900 return dsa_user_vlan_rx_add_vid(arg, proto, vid);
1903 static int dsa_user_clear_vlan(struct net_device *vdev, int vid, void *arg)
1905 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q);
1907 return dsa_user_vlan_rx_kill_vid(arg, proto, vid);
1910 /* Keep the VLAN RX filtering list in sync with the hardware only if VLAN
1911 * filtering is enabled. The baseline is that only ports that offload a
1912 * VLAN-aware bridge are VLAN-aware, and standalone ports are VLAN-unaware,
1913 * but there are exceptions for quirky hardware.
1915 * If ds->vlan_filtering_is_global = true, then standalone ports which share
1916 * the same switch with other ports that offload a VLAN-aware bridge are also
1917 * inevitably VLAN-aware.
1919 * To summarize, a DSA switch port offloads:
1921 * - If standalone (this includes software bridge, software LAG):
1922 * - if ds->needs_standalone_vlan_filtering = true, OR if
1923 * (ds->vlan_filtering_is_global = true AND there are bridges spanning
1924 * this switch chip which have vlan_filtering=1)
1925 * - the 8021q upper VLANs
1926 * - else (standalone VLAN filtering is not needed, VLAN filtering is not
1927 * global, or it is, but no port is under a VLAN-aware bridge):
1928 * - no VLAN (any 8021q upper is a software VLAN)
1930 * - If under a vlan_filtering=0 bridge which it offload:
1931 * - if ds->configure_vlan_while_not_filtering = true (default):
1932 * - the bridge VLANs. These VLANs are committed to hardware but inactive.
1933 * - else (deprecated):
1934 * - no VLAN. The bridge VLANs are not restored when VLAN awareness is
1935 * enabled, so this behavior is broken and discouraged.
1937 * - If under a vlan_filtering=1 bridge which it offload:
1938 * - the bridge VLANs
1939 * - the 8021q upper VLANs
1941 int dsa_user_manage_vlan_filtering(struct net_device *user,
1942 bool vlan_filtering)
1946 if (vlan_filtering) {
1947 user->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1949 err = vlan_for_each(user, dsa_user_restore_vlan, user);
1951 vlan_for_each(user, dsa_user_clear_vlan, user);
1952 user->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
1956 err = vlan_for_each(user, dsa_user_clear_vlan, user);
1960 user->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
1966 struct dsa_hw_port {
1967 struct list_head list;
1968 struct net_device *dev;
1972 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu)
1974 const struct dsa_hw_port *p;
1977 list_for_each_entry(p, hw_port_list, list) {
1978 if (p->dev->mtu == mtu)
1981 err = dev_set_mtu(p->dev, mtu);
1989 list_for_each_entry_continue_reverse(p, hw_port_list, list) {
1990 if (p->dev->mtu == p->old_mtu)
1993 if (dev_set_mtu(p->dev, p->old_mtu))
1994 netdev_err(p->dev, "Failed to restore MTU\n");
2000 static void dsa_hw_port_list_free(struct list_head *hw_port_list)
2002 struct dsa_hw_port *p, *n;
2004 list_for_each_entry_safe(p, n, hw_port_list, list)
2008 /* Make the hardware datapath to/from @dev limited to a common MTU */
2009 static void dsa_bridge_mtu_normalization(struct dsa_port *dp)
2011 struct list_head hw_port_list;
2012 struct dsa_switch_tree *dst;
2013 int min_mtu = ETH_MAX_MTU;
2014 struct dsa_port *other_dp;
2017 if (!dp->ds->mtu_enforcement_ingress)
2023 INIT_LIST_HEAD(&hw_port_list);
2025 /* Populate the list of ports that are part of the same bridge
2026 * as the newly added/modified port
2028 list_for_each_entry(dst, &dsa_tree_list, list) {
2029 list_for_each_entry(other_dp, &dst->ports, list) {
2030 struct dsa_hw_port *hw_port;
2031 struct net_device *user;
2033 if (other_dp->type != DSA_PORT_TYPE_USER)
2036 if (!dsa_port_bridge_same(dp, other_dp))
2039 if (!other_dp->ds->mtu_enforcement_ingress)
2042 user = other_dp->user;
2044 if (min_mtu > user->mtu)
2045 min_mtu = user->mtu;
2047 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL);
2051 hw_port->dev = user;
2052 hw_port->old_mtu = user->mtu;
2054 list_add(&hw_port->list, &hw_port_list);
2058 /* Attempt to configure the entire hardware bridge to the newly added
2059 * interface's MTU first, regardless of whether the intention of the
2060 * user was to raise or lower it.
2062 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->user->mtu);
2066 /* Clearly that didn't work out so well, so just set the minimum MTU on
2067 * all hardware bridge ports now. If this fails too, then all ports will
2068 * still have their old MTU rolled back anyway.
2070 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu);
2073 dsa_hw_port_list_free(&hw_port_list);
2076 int dsa_user_change_mtu(struct net_device *dev, int new_mtu)
2078 struct net_device *conduit = dsa_user_to_conduit(dev);
2079 struct dsa_port *dp = dsa_user_to_port(dev);
2080 struct dsa_port *cpu_dp = dp->cpu_dp;
2081 struct dsa_switch *ds = dp->ds;
2082 struct dsa_port *other_dp;
2083 int largest_mtu = 0;
2084 int new_conduit_mtu;
2085 int old_conduit_mtu;
2091 if (!ds->ops->port_change_mtu)
2094 dsa_tree_for_each_user_port(other_dp, ds->dst) {
2097 /* During probe, this function will be called for each user
2098 * device, while not all of them have been allocated. That's
2099 * ok, it doesn't change what the maximum is, so ignore it.
2101 if (!other_dp->user)
2104 /* Pretend that we already applied the setting, which we
2105 * actually haven't (still haven't done all integrity checks)
2110 user_mtu = other_dp->user->mtu;
2112 if (largest_mtu < user_mtu)
2113 largest_mtu = user_mtu;
2116 overhead = dsa_tag_protocol_overhead(cpu_dp->tag_ops);
2117 mtu_limit = min_t(int, conduit->max_mtu, dev->max_mtu + overhead);
2118 old_conduit_mtu = conduit->mtu;
2119 new_conduit_mtu = largest_mtu + overhead;
2120 if (new_conduit_mtu > mtu_limit)
2123 /* If the conduit MTU isn't over limit, there's no need to check the CPU
2124 * MTU, since that surely isn't either.
2126 cpu_mtu = largest_mtu;
2128 /* Start applying stuff */
2129 if (new_conduit_mtu != old_conduit_mtu) {
2130 err = dev_set_mtu(conduit, new_conduit_mtu);
2132 goto out_conduit_failed;
2134 /* We only need to propagate the MTU of the CPU port to
2135 * upstream switches, so emit a notifier which updates them.
2137 err = dsa_port_mtu_change(cpu_dp, cpu_mtu);
2139 goto out_cpu_failed;
2142 err = ds->ops->port_change_mtu(ds, dp->index, new_mtu);
2144 goto out_port_failed;
2148 dsa_bridge_mtu_normalization(dp);
2153 if (new_conduit_mtu != old_conduit_mtu)
2154 dsa_port_mtu_change(cpu_dp, old_conduit_mtu - overhead);
2156 if (new_conduit_mtu != old_conduit_mtu)
2157 dev_set_mtu(conduit, old_conduit_mtu);
2162 static int __maybe_unused
2163 dsa_user_dcbnl_set_default_prio(struct net_device *dev, struct dcb_app *app)
2165 struct dsa_port *dp = dsa_user_to_port(dev);
2166 struct dsa_switch *ds = dp->ds;
2167 unsigned long mask, new_prio;
2168 int err, port = dp->index;
2170 if (!ds->ops->port_set_default_prio)
2173 err = dcb_ieee_setapp(dev, app);
2177 mask = dcb_ieee_getapp_mask(dev, app);
2178 new_prio = __fls(mask);
2180 err = ds->ops->port_set_default_prio(ds, port, new_prio);
2182 dcb_ieee_delapp(dev, app);
2189 static int __maybe_unused
2190 dsa_user_dcbnl_add_dscp_prio(struct net_device *dev, struct dcb_app *app)
2192 struct dsa_port *dp = dsa_user_to_port(dev);
2193 struct dsa_switch *ds = dp->ds;
2194 unsigned long mask, new_prio;
2195 int err, port = dp->index;
2196 u8 dscp = app->protocol;
2198 if (!ds->ops->port_add_dscp_prio)
2202 netdev_err(dev, "DSCP APP entry with protocol value %u is invalid\n",
2207 err = dcb_ieee_setapp(dev, app);
2211 mask = dcb_ieee_getapp_mask(dev, app);
2212 new_prio = __fls(mask);
2214 err = ds->ops->port_add_dscp_prio(ds, port, dscp, new_prio);
2216 dcb_ieee_delapp(dev, app);
2223 static int __maybe_unused dsa_user_dcbnl_ieee_setapp(struct net_device *dev,
2224 struct dcb_app *app)
2226 switch (app->selector) {
2227 case IEEE_8021QAZ_APP_SEL_ETHERTYPE:
2228 switch (app->protocol) {
2230 return dsa_user_dcbnl_set_default_prio(dev, app);
2235 case IEEE_8021QAZ_APP_SEL_DSCP:
2236 return dsa_user_dcbnl_add_dscp_prio(dev, app);
2242 static int __maybe_unused
2243 dsa_user_dcbnl_del_default_prio(struct net_device *dev, struct dcb_app *app)
2245 struct dsa_port *dp = dsa_user_to_port(dev);
2246 struct dsa_switch *ds = dp->ds;
2247 unsigned long mask, new_prio;
2248 int err, port = dp->index;
2250 if (!ds->ops->port_set_default_prio)
2253 err = dcb_ieee_delapp(dev, app);
2257 mask = dcb_ieee_getapp_mask(dev, app);
2258 new_prio = mask ? __fls(mask) : 0;
2260 err = ds->ops->port_set_default_prio(ds, port, new_prio);
2262 dcb_ieee_setapp(dev, app);
2269 static int __maybe_unused
2270 dsa_user_dcbnl_del_dscp_prio(struct net_device *dev, struct dcb_app *app)
2272 struct dsa_port *dp = dsa_user_to_port(dev);
2273 struct dsa_switch *ds = dp->ds;
2274 int err, port = dp->index;
2275 u8 dscp = app->protocol;
2277 if (!ds->ops->port_del_dscp_prio)
2280 err = dcb_ieee_delapp(dev, app);
2284 err = ds->ops->port_del_dscp_prio(ds, port, dscp, app->priority);
2286 dcb_ieee_setapp(dev, app);
2293 static int __maybe_unused dsa_user_dcbnl_ieee_delapp(struct net_device *dev,
2294 struct dcb_app *app)
2296 switch (app->selector) {
2297 case IEEE_8021QAZ_APP_SEL_ETHERTYPE:
2298 switch (app->protocol) {
2300 return dsa_user_dcbnl_del_default_prio(dev, app);
2305 case IEEE_8021QAZ_APP_SEL_DSCP:
2306 return dsa_user_dcbnl_del_dscp_prio(dev, app);
2312 /* Pre-populate the DCB application priority table with the priorities
2313 * configured during switch setup, which we read from hardware here.
2315 static int dsa_user_dcbnl_init(struct net_device *dev)
2317 struct dsa_port *dp = dsa_user_to_port(dev);
2318 struct dsa_switch *ds = dp->ds;
2319 int port = dp->index;
2322 if (ds->ops->port_get_default_prio) {
2323 int prio = ds->ops->port_get_default_prio(ds, port);
2324 struct dcb_app app = {
2325 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE,
2333 err = dcb_ieee_setapp(dev, &app);
2338 if (ds->ops->port_get_dscp_prio) {
2341 for (protocol = 0; protocol < 64; protocol++) {
2342 struct dcb_app app = {
2343 .selector = IEEE_8021QAZ_APP_SEL_DSCP,
2344 .protocol = protocol,
2348 prio = ds->ops->port_get_dscp_prio(ds, port, protocol);
2349 if (prio == -EOPNOTSUPP)
2354 app.priority = prio;
2356 err = dcb_ieee_setapp(dev, &app);
2365 static const struct ethtool_ops dsa_user_ethtool_ops = {
2366 .get_drvinfo = dsa_user_get_drvinfo,
2367 .get_regs_len = dsa_user_get_regs_len,
2368 .get_regs = dsa_user_get_regs,
2369 .nway_reset = dsa_user_nway_reset,
2370 .get_link = ethtool_op_get_link,
2371 .get_eeprom_len = dsa_user_get_eeprom_len,
2372 .get_eeprom = dsa_user_get_eeprom,
2373 .set_eeprom = dsa_user_set_eeprom,
2374 .get_strings = dsa_user_get_strings,
2375 .get_ethtool_stats = dsa_user_get_ethtool_stats,
2376 .get_sset_count = dsa_user_get_sset_count,
2377 .get_eth_phy_stats = dsa_user_get_eth_phy_stats,
2378 .get_eth_mac_stats = dsa_user_get_eth_mac_stats,
2379 .get_eth_ctrl_stats = dsa_user_get_eth_ctrl_stats,
2380 .get_rmon_stats = dsa_user_get_rmon_stats,
2381 .set_wol = dsa_user_set_wol,
2382 .get_wol = dsa_user_get_wol,
2383 .set_eee = dsa_user_set_eee,
2384 .get_eee = dsa_user_get_eee,
2385 .get_link_ksettings = dsa_user_get_link_ksettings,
2386 .set_link_ksettings = dsa_user_set_link_ksettings,
2387 .get_pause_stats = dsa_user_get_pause_stats,
2388 .get_pauseparam = dsa_user_get_pauseparam,
2389 .set_pauseparam = dsa_user_set_pauseparam,
2390 .get_rxnfc = dsa_user_get_rxnfc,
2391 .set_rxnfc = dsa_user_set_rxnfc,
2392 .get_ts_info = dsa_user_get_ts_info,
2393 .self_test = dsa_user_net_selftest,
2394 .get_mm = dsa_user_get_mm,
2395 .set_mm = dsa_user_set_mm,
2396 .get_mm_stats = dsa_user_get_mm_stats,
2399 static const struct dcbnl_rtnl_ops __maybe_unused dsa_user_dcbnl_ops = {
2400 .ieee_setapp = dsa_user_dcbnl_ieee_setapp,
2401 .ieee_delapp = dsa_user_dcbnl_ieee_delapp,
2404 static void dsa_user_get_stats64(struct net_device *dev,
2405 struct rtnl_link_stats64 *s)
2407 struct dsa_port *dp = dsa_user_to_port(dev);
2408 struct dsa_switch *ds = dp->ds;
2410 if (ds->ops->get_stats64)
2411 ds->ops->get_stats64(ds, dp->index, s);
2413 dev_get_tstats64(dev, s);
2416 static int dsa_user_fill_forward_path(struct net_device_path_ctx *ctx,
2417 struct net_device_path *path)
2419 struct dsa_port *dp = dsa_user_to_port(ctx->dev);
2420 struct net_device *conduit = dsa_port_to_conduit(dp);
2421 struct dsa_port *cpu_dp = dp->cpu_dp;
2423 path->dev = ctx->dev;
2424 path->type = DEV_PATH_DSA;
2425 path->dsa.proto = cpu_dp->tag_ops->proto;
2426 path->dsa.port = dp->index;
2432 static const struct net_device_ops dsa_user_netdev_ops = {
2433 .ndo_open = dsa_user_open,
2434 .ndo_stop = dsa_user_close,
2435 .ndo_start_xmit = dsa_user_xmit,
2436 .ndo_change_rx_flags = dsa_user_change_rx_flags,
2437 .ndo_set_rx_mode = dsa_user_set_rx_mode,
2438 .ndo_set_mac_address = dsa_user_set_mac_address,
2439 .ndo_fdb_dump = dsa_user_fdb_dump,
2440 .ndo_eth_ioctl = dsa_user_ioctl,
2441 .ndo_get_iflink = dsa_user_get_iflink,
2442 #ifdef CONFIG_NET_POLL_CONTROLLER
2443 .ndo_netpoll_setup = dsa_user_netpoll_setup,
2444 .ndo_netpoll_cleanup = dsa_user_netpoll_cleanup,
2445 .ndo_poll_controller = dsa_user_poll_controller,
2447 .ndo_setup_tc = dsa_user_setup_tc,
2448 .ndo_get_stats64 = dsa_user_get_stats64,
2449 .ndo_vlan_rx_add_vid = dsa_user_vlan_rx_add_vid,
2450 .ndo_vlan_rx_kill_vid = dsa_user_vlan_rx_kill_vid,
2451 .ndo_change_mtu = dsa_user_change_mtu,
2452 .ndo_fill_forward_path = dsa_user_fill_forward_path,
2455 static struct device_type dsa_type = {
2459 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
2461 const struct dsa_port *dp = dsa_to_port(ds, port);
2464 phylink_mac_change(dp->pl, up);
2466 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
2468 static void dsa_user_phylink_fixed_state(struct phylink_config *config,
2469 struct phylink_link_state *state)
2471 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
2472 struct dsa_switch *ds = dp->ds;
2474 /* No need to check that this operation is valid, the callback would
2475 * not be called if it was not.
2477 ds->ops->phylink_fixed_state(ds, dp->index, state);
2480 /* user device setup *******************************************************/
2481 static int dsa_user_phy_connect(struct net_device *user_dev, int addr,
2484 struct dsa_port *dp = dsa_user_to_port(user_dev);
2485 struct dsa_switch *ds = dp->ds;
2487 user_dev->phydev = mdiobus_get_phy(ds->user_mii_bus, addr);
2488 if (!user_dev->phydev) {
2489 netdev_err(user_dev, "no phy at %d\n", addr);
2493 user_dev->phydev->dev_flags |= flags;
2495 return phylink_connect_phy(dp->pl, user_dev->phydev);
2498 static int dsa_user_phy_setup(struct net_device *user_dev)
2500 struct dsa_port *dp = dsa_user_to_port(user_dev);
2501 struct device_node *port_dn = dp->dn;
2502 struct dsa_switch *ds = dp->ds;
2506 dp->pl_config.dev = &user_dev->dev;
2507 dp->pl_config.type = PHYLINK_NETDEV;
2509 /* The get_fixed_state callback takes precedence over polling the
2510 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set
2511 * this if the switch provides such a callback.
2513 if (ds->ops->phylink_fixed_state) {
2514 dp->pl_config.get_fixed_state = dsa_user_phylink_fixed_state;
2515 dp->pl_config.poll_fixed_state = true;
2518 ret = dsa_port_phylink_create(dp);
2522 if (ds->ops->get_phy_flags)
2523 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
2525 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
2526 if (ret == -ENODEV && ds->user_mii_bus) {
2527 /* We could not connect to a designated PHY or SFP, so try to
2528 * use the switch internal MDIO bus instead
2530 ret = dsa_user_phy_connect(user_dev, dp->index, phy_flags);
2533 netdev_err(user_dev, "failed to connect to PHY: %pe\n",
2535 dsa_port_phylink_destroy(dp);
2541 void dsa_user_setup_tagger(struct net_device *user)
2543 struct dsa_port *dp = dsa_user_to_port(user);
2544 struct net_device *conduit = dsa_port_to_conduit(dp);
2545 struct dsa_user_priv *p = netdev_priv(user);
2546 const struct dsa_port *cpu_dp = dp->cpu_dp;
2547 const struct dsa_switch *ds = dp->ds;
2549 user->needed_headroom = cpu_dp->tag_ops->needed_headroom;
2550 user->needed_tailroom = cpu_dp->tag_ops->needed_tailroom;
2551 /* Try to save one extra realloc later in the TX path (in the conduit)
2552 * by also inheriting the conduit's needed headroom and tailroom.
2553 * The 8021q driver also does this.
2555 user->needed_headroom += conduit->needed_headroom;
2556 user->needed_tailroom += conduit->needed_tailroom;
2558 p->xmit = cpu_dp->tag_ops->xmit;
2560 user->features = conduit->vlan_features | NETIF_F_HW_TC;
2561 user->hw_features |= NETIF_F_HW_TC;
2562 user->features |= NETIF_F_LLTX;
2563 if (user->needed_tailroom)
2564 user->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST);
2565 if (ds->needs_standalone_vlan_filtering)
2566 user->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
2569 int dsa_user_suspend(struct net_device *user_dev)
2571 struct dsa_port *dp = dsa_user_to_port(user_dev);
2573 if (!netif_running(user_dev))
2576 netif_device_detach(user_dev);
2579 phylink_stop(dp->pl);
2585 int dsa_user_resume(struct net_device *user_dev)
2587 struct dsa_port *dp = dsa_user_to_port(user_dev);
2589 if (!netif_running(user_dev))
2592 netif_device_attach(user_dev);
2595 phylink_start(dp->pl);
2601 int dsa_user_create(struct dsa_port *port)
2603 struct net_device *conduit = dsa_port_to_conduit(port);
2604 struct dsa_switch *ds = port->ds;
2605 struct net_device *user_dev;
2606 struct dsa_user_priv *p;
2611 if (!ds->num_tx_queues)
2612 ds->num_tx_queues = 1;
2616 assign_type = NET_NAME_PREDICTABLE;
2619 assign_type = NET_NAME_ENUM;
2622 user_dev = alloc_netdev_mqs(sizeof(struct dsa_user_priv), name,
2623 assign_type, ether_setup,
2624 ds->num_tx_queues, 1);
2625 if (user_dev == NULL)
2628 user_dev->rtnl_link_ops = &dsa_link_ops;
2629 user_dev->ethtool_ops = &dsa_user_ethtool_ops;
2630 #if IS_ENABLED(CONFIG_DCB)
2631 user_dev->dcbnl_ops = &dsa_user_dcbnl_ops;
2633 if (!is_zero_ether_addr(port->mac))
2634 eth_hw_addr_set(user_dev, port->mac);
2636 eth_hw_addr_inherit(user_dev, conduit);
2637 user_dev->priv_flags |= IFF_NO_QUEUE;
2638 if (dsa_switch_supports_uc_filtering(ds))
2639 user_dev->priv_flags |= IFF_UNICAST_FLT;
2640 user_dev->netdev_ops = &dsa_user_netdev_ops;
2641 if (ds->ops->port_max_mtu)
2642 user_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index);
2643 SET_NETDEV_DEVTYPE(user_dev, &dsa_type);
2645 SET_NETDEV_DEV(user_dev, port->ds->dev);
2646 SET_NETDEV_DEVLINK_PORT(user_dev, &port->devlink_port);
2647 user_dev->dev.of_node = port->dn;
2648 user_dev->vlan_features = conduit->vlan_features;
2650 p = netdev_priv(user_dev);
2651 user_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
2652 if (!user_dev->tstats) {
2653 free_netdev(user_dev);
2657 ret = gro_cells_init(&p->gcells, user_dev);
2662 INIT_LIST_HEAD(&p->mall_tc_list);
2663 port->user = user_dev;
2664 dsa_user_setup_tagger(user_dev);
2666 netif_carrier_off(user_dev);
2668 ret = dsa_user_phy_setup(user_dev);
2670 netdev_err(user_dev,
2671 "error %d setting up PHY for tree %d, switch %d, port %d\n",
2672 ret, ds->dst->index, ds->index, port->index);
2678 ret = dsa_user_change_mtu(user_dev, ETH_DATA_LEN);
2679 if (ret && ret != -EOPNOTSUPP)
2680 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n",
2681 ret, ETH_DATA_LEN, port->index);
2683 ret = register_netdevice(user_dev);
2685 netdev_err(conduit, "error %d registering interface %s\n",
2686 ret, user_dev->name);
2691 if (IS_ENABLED(CONFIG_DCB)) {
2692 ret = dsa_user_dcbnl_init(user_dev);
2694 netdev_err(user_dev,
2695 "failed to initialize DCB: %pe\n",
2698 goto out_unregister;
2702 ret = netdev_upper_dev_link(conduit, user_dev, NULL);
2707 goto out_unregister;
2712 unregister_netdev(user_dev);
2715 phylink_disconnect_phy(p->dp->pl);
2717 dsa_port_phylink_destroy(p->dp);
2719 gro_cells_destroy(&p->gcells);
2721 free_percpu(user_dev->tstats);
2722 free_netdev(user_dev);
2727 void dsa_user_destroy(struct net_device *user_dev)
2729 struct net_device *conduit = dsa_user_to_conduit(user_dev);
2730 struct dsa_port *dp = dsa_user_to_port(user_dev);
2731 struct dsa_user_priv *p = netdev_priv(user_dev);
2733 netif_carrier_off(user_dev);
2735 netdev_upper_dev_unlink(conduit, user_dev);
2736 unregister_netdevice(user_dev);
2737 phylink_disconnect_phy(dp->pl);
2740 dsa_port_phylink_destroy(dp);
2741 gro_cells_destroy(&p->gcells);
2742 free_percpu(user_dev->tstats);
2743 free_netdev(user_dev);
2746 int dsa_user_change_conduit(struct net_device *dev, struct net_device *conduit,
2747 struct netlink_ext_ack *extack)
2749 struct net_device *old_conduit = dsa_user_to_conduit(dev);
2750 struct dsa_port *dp = dsa_user_to_port(dev);
2751 struct dsa_switch *ds = dp->ds;
2752 struct net_device *upper;
2753 struct list_head *iter;
2756 if (conduit == old_conduit)
2759 if (!ds->ops->port_change_conduit) {
2760 NL_SET_ERR_MSG_MOD(extack,
2761 "Driver does not support changing DSA conduit");
2765 if (!netdev_uses_dsa(conduit)) {
2766 NL_SET_ERR_MSG_MOD(extack,
2767 "Interface not eligible as DSA conduit");
2771 netdev_for_each_upper_dev_rcu(conduit, upper, iter) {
2772 if (dsa_user_dev_check(upper))
2774 if (netif_is_bridge_master(upper))
2776 NL_SET_ERR_MSG_MOD(extack, "Cannot join conduit with unknown uppers");
2780 /* Since we allow live-changing the DSA conduit, plus we auto-open the
2781 * DSA conduit when the user port opens => we need to ensure that the
2782 * new DSA conduit is open too.
2784 if (dev->flags & IFF_UP) {
2785 err = dev_open(conduit, extack);
2790 netdev_upper_dev_unlink(old_conduit, dev);
2792 err = netdev_upper_dev_link(conduit, dev, extack);
2794 goto out_revert_old_conduit_unlink;
2796 err = dsa_port_change_conduit(dp, conduit, extack);
2798 goto out_revert_conduit_link;
2800 /* Update the MTU of the new CPU port through cross-chip notifiers */
2801 err = dsa_user_change_mtu(dev, dev->mtu);
2802 if (err && err != -EOPNOTSUPP) {
2804 "nonfatal error updating MTU with new conduit: %pe\n",
2808 /* If the port doesn't have its own MAC address and relies on the DSA
2809 * conduit's one, inherit it again from the new DSA conduit.
2811 if (is_zero_ether_addr(dp->mac))
2812 eth_hw_addr_inherit(dev, conduit);
2816 out_revert_conduit_link:
2817 netdev_upper_dev_unlink(conduit, dev);
2818 out_revert_old_conduit_unlink:
2819 netdev_upper_dev_link(old_conduit, dev, NULL);
2823 bool dsa_user_dev_check(const struct net_device *dev)
2825 return dev->netdev_ops == &dsa_user_netdev_ops;
2827 EXPORT_SYMBOL_GPL(dsa_user_dev_check);
2829 static int dsa_user_changeupper(struct net_device *dev,
2830 struct netdev_notifier_changeupper_info *info)
2832 struct dsa_port *dp = dsa_user_to_port(dev);
2833 struct netlink_ext_ack *extack;
2834 int err = NOTIFY_DONE;
2836 if (!dsa_user_dev_check(dev))
2839 extack = netdev_notifier_info_to_extack(&info->info);
2841 if (netif_is_bridge_master(info->upper_dev)) {
2842 if (info->linking) {
2843 err = dsa_port_bridge_join(dp, info->upper_dev, extack);
2845 dsa_bridge_mtu_normalization(dp);
2846 if (err == -EOPNOTSUPP) {
2847 NL_SET_ERR_MSG_WEAK_MOD(extack,
2848 "Offloading not supported");
2851 err = notifier_from_errno(err);
2853 dsa_port_bridge_leave(dp, info->upper_dev);
2856 } else if (netif_is_lag_master(info->upper_dev)) {
2857 if (info->linking) {
2858 err = dsa_port_lag_join(dp, info->upper_dev,
2859 info->upper_info, extack);
2860 if (err == -EOPNOTSUPP) {
2861 NL_SET_ERR_MSG_WEAK_MOD(extack,
2862 "Offloading not supported");
2865 err = notifier_from_errno(err);
2867 dsa_port_lag_leave(dp, info->upper_dev);
2870 } else if (is_hsr_master(info->upper_dev)) {
2871 if (info->linking) {
2872 err = dsa_port_hsr_join(dp, info->upper_dev, extack);
2873 if (err == -EOPNOTSUPP) {
2874 NL_SET_ERR_MSG_WEAK_MOD(extack,
2875 "Offloading not supported");
2878 err = notifier_from_errno(err);
2880 dsa_port_hsr_leave(dp, info->upper_dev);
2888 static int dsa_user_prechangeupper(struct net_device *dev,
2889 struct netdev_notifier_changeupper_info *info)
2891 struct dsa_port *dp = dsa_user_to_port(dev);
2893 if (!dsa_user_dev_check(dev))
2896 if (netif_is_bridge_master(info->upper_dev) && !info->linking)
2897 dsa_port_pre_bridge_leave(dp, info->upper_dev);
2898 else if (netif_is_lag_master(info->upper_dev) && !info->linking)
2899 dsa_port_pre_lag_leave(dp, info->upper_dev);
2900 /* dsa_port_pre_hsr_leave is not yet necessary since hsr devices cannot
2901 * meaningfully placed under a bridge yet
2908 dsa_user_lag_changeupper(struct net_device *dev,
2909 struct netdev_notifier_changeupper_info *info)
2911 struct net_device *lower;
2912 struct list_head *iter;
2913 int err = NOTIFY_DONE;
2914 struct dsa_port *dp;
2916 if (!netif_is_lag_master(dev))
2919 netdev_for_each_lower_dev(dev, lower, iter) {
2920 if (!dsa_user_dev_check(lower))
2923 dp = dsa_user_to_port(lower);
2928 err = dsa_user_changeupper(lower, info);
2929 if (notifier_to_errno(err))
2936 /* Same as dsa_user_lag_changeupper() except that it calls
2937 * dsa_user_prechangeupper()
2940 dsa_user_lag_prechangeupper(struct net_device *dev,
2941 struct netdev_notifier_changeupper_info *info)
2943 struct net_device *lower;
2944 struct list_head *iter;
2945 int err = NOTIFY_DONE;
2946 struct dsa_port *dp;
2948 if (!netif_is_lag_master(dev))
2951 netdev_for_each_lower_dev(dev, lower, iter) {
2952 if (!dsa_user_dev_check(lower))
2955 dp = dsa_user_to_port(lower);
2960 err = dsa_user_prechangeupper(lower, info);
2961 if (notifier_to_errno(err))
2969 dsa_prevent_bridging_8021q_upper(struct net_device *dev,
2970 struct netdev_notifier_changeupper_info *info)
2972 struct netlink_ext_ack *ext_ack;
2973 struct net_device *user, *br;
2974 struct dsa_port *dp;
2976 ext_ack = netdev_notifier_info_to_extack(&info->info);
2978 if (!is_vlan_dev(dev))
2981 user = vlan_dev_real_dev(dev);
2982 if (!dsa_user_dev_check(user))
2985 dp = dsa_user_to_port(user);
2986 br = dsa_port_bridge_dev_get(dp);
2990 /* Deny enslaving a VLAN device into a VLAN-aware bridge */
2991 if (br_vlan_enabled(br) &&
2992 netif_is_bridge_master(info->upper_dev) && info->linking) {
2993 NL_SET_ERR_MSG_MOD(ext_ack,
2994 "Cannot make VLAN device join VLAN-aware bridge");
2995 return notifier_from_errno(-EINVAL);
3002 dsa_user_check_8021q_upper(struct net_device *dev,
3003 struct netdev_notifier_changeupper_info *info)
3005 struct dsa_port *dp = dsa_user_to_port(dev);
3006 struct net_device *br = dsa_port_bridge_dev_get(dp);
3007 struct bridge_vlan_info br_info;
3008 struct netlink_ext_ack *extack;
3009 int err = NOTIFY_DONE;
3012 if (!br || !br_vlan_enabled(br))
3015 extack = netdev_notifier_info_to_extack(&info->info);
3016 vid = vlan_dev_vlan_id(info->upper_dev);
3018 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
3019 * device, respectively the VID is not found, returning
3020 * 0 means success, which is a failure for us here.
3022 err = br_vlan_get_info(br, vid, &br_info);
3024 NL_SET_ERR_MSG_MOD(extack,
3025 "This VLAN is already configured by the bridge");
3026 return notifier_from_errno(-EBUSY);
3033 dsa_user_prechangeupper_sanity_check(struct net_device *dev,
3034 struct netdev_notifier_changeupper_info *info)
3036 struct dsa_switch *ds;
3037 struct dsa_port *dp;
3040 if (!dsa_user_dev_check(dev))
3041 return dsa_prevent_bridging_8021q_upper(dev, info);
3043 dp = dsa_user_to_port(dev);
3046 if (ds->ops->port_prechangeupper) {
3047 err = ds->ops->port_prechangeupper(ds, dp->index, info);
3049 return notifier_from_errno(err);
3052 if (is_vlan_dev(info->upper_dev))
3053 return dsa_user_check_8021q_upper(dev, info);
3058 /* To be eligible as a DSA conduit, a LAG must have all lower interfaces be
3059 * eligible DSA conduits. Additionally, all LAG slaves must be DSA conduits of
3060 * switches in the same switch tree.
3062 static int dsa_lag_conduit_validate(struct net_device *lag_dev,
3063 struct netlink_ext_ack *extack)
3065 struct net_device *lower1, *lower2;
3066 struct list_head *iter1, *iter2;
3068 netdev_for_each_lower_dev(lag_dev, lower1, iter1) {
3069 netdev_for_each_lower_dev(lag_dev, lower2, iter2) {
3070 if (!netdev_uses_dsa(lower1) ||
3071 !netdev_uses_dsa(lower2)) {
3072 NL_SET_ERR_MSG_MOD(extack,
3073 "All LAG ports must be eligible as DSA conduits");
3074 return notifier_from_errno(-EINVAL);
3077 if (lower1 == lower2)
3080 if (!dsa_port_tree_same(lower1->dsa_ptr,
3082 NL_SET_ERR_MSG_MOD(extack,
3083 "LAG contains DSA conduits of disjoint switch trees");
3084 return notifier_from_errno(-EINVAL);
3093 dsa_conduit_prechangeupper_sanity_check(struct net_device *conduit,
3094 struct netdev_notifier_changeupper_info *info)
3096 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info);
3098 if (!netdev_uses_dsa(conduit))
3104 /* Allow DSA switch uppers */
3105 if (dsa_user_dev_check(info->upper_dev))
3108 /* Allow bridge uppers of DSA conduits, subject to further
3109 * restrictions in dsa_bridge_prechangelower_sanity_check()
3111 if (netif_is_bridge_master(info->upper_dev))
3114 /* Allow LAG uppers, subject to further restrictions in
3115 * dsa_lag_conduit_prechangelower_sanity_check()
3117 if (netif_is_lag_master(info->upper_dev))
3118 return dsa_lag_conduit_validate(info->upper_dev, extack);
3120 NL_SET_ERR_MSG_MOD(extack,
3121 "DSA conduit cannot join unknown upper interfaces");
3122 return notifier_from_errno(-EBUSY);
3126 dsa_lag_conduit_prechangelower_sanity_check(struct net_device *dev,
3127 struct netdev_notifier_changeupper_info *info)
3129 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info);
3130 struct net_device *lag_dev = info->upper_dev;
3131 struct net_device *lower;
3132 struct list_head *iter;
3134 if (!netdev_uses_dsa(lag_dev) || !netif_is_lag_master(lag_dev))
3140 if (!netdev_uses_dsa(dev)) {
3141 NL_SET_ERR_MSG(extack,
3142 "Only DSA conduits can join a LAG DSA conduit");
3143 return notifier_from_errno(-EINVAL);
3146 netdev_for_each_lower_dev(lag_dev, lower, iter) {
3147 if (!dsa_port_tree_same(dev->dsa_ptr, lower->dsa_ptr)) {
3148 NL_SET_ERR_MSG(extack,
3149 "Interface is DSA conduit for a different switch tree than this LAG");
3150 return notifier_from_errno(-EINVAL);
3159 /* Don't allow bridging of DSA conduits, since the bridge layer rx_handler
3160 * prevents the DSA fake ethertype handler to be invoked, so we don't get the
3161 * chance to strip off and parse the DSA switch tag protocol header (the bridge
3162 * layer just returns RX_HANDLER_CONSUMED, stopping RX processing for these
3164 * The only case where that would not be an issue is when bridging can already
3165 * be offloaded, such as when the DSA conduit is itself a DSA or plain switchdev
3166 * port, and is bridged only with other ports from the same hardware device.
3169 dsa_bridge_prechangelower_sanity_check(struct net_device *new_lower,
3170 struct netdev_notifier_changeupper_info *info)
3172 struct net_device *br = info->upper_dev;
3173 struct netlink_ext_ack *extack;
3174 struct net_device *lower;
3175 struct list_head *iter;
3177 if (!netif_is_bridge_master(br))
3183 extack = netdev_notifier_info_to_extack(&info->info);
3185 netdev_for_each_lower_dev(br, lower, iter) {
3186 if (!netdev_uses_dsa(new_lower) && !netdev_uses_dsa(lower))
3189 if (!netdev_port_same_parent_id(lower, new_lower)) {
3190 NL_SET_ERR_MSG(extack,
3191 "Cannot do software bridging with a DSA conduit");
3192 return notifier_from_errno(-EINVAL);
3199 static void dsa_tree_migrate_ports_from_lag_conduit(struct dsa_switch_tree *dst,
3200 struct net_device *lag_dev)
3202 struct net_device *new_conduit = dsa_tree_find_first_conduit(dst);
3203 struct dsa_port *dp;
3206 dsa_tree_for_each_user_port(dp, dst) {
3207 if (dsa_port_to_conduit(dp) != lag_dev)
3210 err = dsa_user_change_conduit(dp->user, new_conduit, NULL);
3212 netdev_err(dp->user,
3213 "failed to restore conduit to %s: %pe\n",
3214 new_conduit->name, ERR_PTR(err));
3219 static int dsa_conduit_lag_join(struct net_device *conduit,
3220 struct net_device *lag_dev,
3221 struct netdev_lag_upper_info *uinfo,
3222 struct netlink_ext_ack *extack)
3224 struct dsa_port *cpu_dp = conduit->dsa_ptr;
3225 struct dsa_switch_tree *dst = cpu_dp->dst;
3226 struct dsa_port *dp;
3229 err = dsa_conduit_lag_setup(lag_dev, cpu_dp, uinfo, extack);
3233 dsa_tree_for_each_user_port(dp, dst) {
3234 if (dsa_port_to_conduit(dp) != conduit)
3237 err = dsa_user_change_conduit(dp->user, lag_dev, extack);
3245 dsa_tree_for_each_user_port_continue_reverse(dp, dst) {
3246 if (dsa_port_to_conduit(dp) != lag_dev)
3249 err = dsa_user_change_conduit(dp->user, conduit, NULL);
3251 netdev_err(dp->user,
3252 "failed to restore conduit to %s: %pe\n",
3253 conduit->name, ERR_PTR(err));
3257 dsa_conduit_lag_teardown(lag_dev, conduit->dsa_ptr);
3262 static void dsa_conduit_lag_leave(struct net_device *conduit,
3263 struct net_device *lag_dev)
3265 struct dsa_port *dp, *cpu_dp = lag_dev->dsa_ptr;
3266 struct dsa_switch_tree *dst = cpu_dp->dst;
3267 struct dsa_port *new_cpu_dp = NULL;
3268 struct net_device *lower;
3269 struct list_head *iter;
3271 netdev_for_each_lower_dev(lag_dev, lower, iter) {
3272 if (netdev_uses_dsa(lower)) {
3273 new_cpu_dp = lower->dsa_ptr;
3279 /* Update the CPU port of the user ports still under the LAG
3280 * so that dsa_port_to_conduit() continues to work properly
3282 dsa_tree_for_each_user_port(dp, dst)
3283 if (dsa_port_to_conduit(dp) == lag_dev)
3284 dp->cpu_dp = new_cpu_dp;
3286 /* Update the index of the virtual CPU port to match the lowest
3289 lag_dev->dsa_ptr = new_cpu_dp;
3292 /* If the LAG DSA conduit has no ports left, migrate back all
3293 * user ports to the first physical CPU port
3295 dsa_tree_migrate_ports_from_lag_conduit(dst, lag_dev);
3298 /* This DSA conduit has left its LAG in any case, so let
3299 * the CPU port leave the hardware LAG as well
3301 dsa_conduit_lag_teardown(lag_dev, conduit->dsa_ptr);
3304 static int dsa_conduit_changeupper(struct net_device *dev,
3305 struct netdev_notifier_changeupper_info *info)
3307 struct netlink_ext_ack *extack;
3308 int err = NOTIFY_DONE;
3310 if (!netdev_uses_dsa(dev))
3313 extack = netdev_notifier_info_to_extack(&info->info);
3315 if (netif_is_lag_master(info->upper_dev)) {
3316 if (info->linking) {
3317 err = dsa_conduit_lag_join(dev, info->upper_dev,
3318 info->upper_info, extack);
3319 err = notifier_from_errno(err);
3321 dsa_conduit_lag_leave(dev, info->upper_dev);
3329 static int dsa_user_netdevice_event(struct notifier_block *nb,
3330 unsigned long event, void *ptr)
3332 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3335 case NETDEV_PRECHANGEUPPER: {
3336 struct netdev_notifier_changeupper_info *info = ptr;
3339 err = dsa_user_prechangeupper_sanity_check(dev, info);
3340 if (notifier_to_errno(err))
3343 err = dsa_conduit_prechangeupper_sanity_check(dev, info);
3344 if (notifier_to_errno(err))
3347 err = dsa_lag_conduit_prechangelower_sanity_check(dev, info);
3348 if (notifier_to_errno(err))
3351 err = dsa_bridge_prechangelower_sanity_check(dev, info);
3352 if (notifier_to_errno(err))
3355 err = dsa_user_prechangeupper(dev, ptr);
3356 if (notifier_to_errno(err))
3359 err = dsa_user_lag_prechangeupper(dev, ptr);
3360 if (notifier_to_errno(err))
3365 case NETDEV_CHANGEUPPER: {
3368 err = dsa_user_changeupper(dev, ptr);
3369 if (notifier_to_errno(err))
3372 err = dsa_user_lag_changeupper(dev, ptr);
3373 if (notifier_to_errno(err))
3376 err = dsa_conduit_changeupper(dev, ptr);
3377 if (notifier_to_errno(err))
3382 case NETDEV_CHANGELOWERSTATE: {
3383 struct netdev_notifier_changelowerstate_info *info = ptr;
3384 struct dsa_port *dp;
3387 if (dsa_user_dev_check(dev)) {
3388 dp = dsa_user_to_port(dev);
3390 err = dsa_port_lag_change(dp, info->lower_state_info);
3393 /* Mirror LAG port events on DSA conduits that are in
3394 * a LAG towards their respective switch CPU ports
3396 if (netdev_uses_dsa(dev)) {
3399 err = dsa_port_lag_change(dp, info->lower_state_info);
3402 return notifier_from_errno(err);
3406 /* Track state of conduit port.
3407 * DSA driver may require the conduit port (and indirectly
3408 * the tagger) to be available for some special operation.
3410 if (netdev_uses_dsa(dev)) {
3411 struct dsa_port *cpu_dp = dev->dsa_ptr;
3412 struct dsa_switch_tree *dst = cpu_dp->ds->dst;
3414 /* Track when the conduit port is UP */
3415 dsa_tree_conduit_oper_state_change(dst, dev,
3416 netif_oper_up(dev));
3418 /* Track when the conduit port is ready and can accept
3420 * NETDEV_UP event is not enough to flag a port as ready.
3421 * We also have to wait for linkwatch_do_dev to dev_activate
3422 * and emit a NETDEV_CHANGE event.
3423 * We check if a conduit port is ready by checking if the dev
3424 * have a qdisc assigned and is not noop.
3426 dsa_tree_conduit_admin_state_change(dst, dev,
3427 !qdisc_tx_is_noop(dev));
3434 case NETDEV_GOING_DOWN: {
3435 struct dsa_port *dp, *cpu_dp;
3436 struct dsa_switch_tree *dst;
3437 LIST_HEAD(close_list);
3439 if (!netdev_uses_dsa(dev))
3442 cpu_dp = dev->dsa_ptr;
3443 dst = cpu_dp->ds->dst;
3445 dsa_tree_conduit_admin_state_change(dst, dev, false);
3447 list_for_each_entry(dp, &dst->ports, list) {
3448 if (!dsa_port_is_user(dp))
3451 if (dp->cpu_dp != cpu_dp)
3454 list_add(&dp->user->close_list, &close_list);
3457 dev_close_many(&close_list, true);
3469 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work)
3471 struct switchdev_notifier_fdb_info info = {};
3473 info.addr = switchdev_work->addr;
3474 info.vid = switchdev_work->vid;
3475 info.offloaded = true;
3476 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
3477 switchdev_work->orig_dev, &info.info, NULL);
3480 static void dsa_user_switchdev_event_work(struct work_struct *work)
3482 struct dsa_switchdev_event_work *switchdev_work =
3483 container_of(work, struct dsa_switchdev_event_work, work);
3484 const unsigned char *addr = switchdev_work->addr;
3485 struct net_device *dev = switchdev_work->dev;
3486 u16 vid = switchdev_work->vid;
3487 struct dsa_switch *ds;
3488 struct dsa_port *dp;
3491 dp = dsa_user_to_port(dev);
3494 switch (switchdev_work->event) {
3495 case SWITCHDEV_FDB_ADD_TO_DEVICE:
3496 if (switchdev_work->host_addr)
3497 err = dsa_port_bridge_host_fdb_add(dp, addr, vid);
3499 err = dsa_port_lag_fdb_add(dp, addr, vid);
3501 err = dsa_port_fdb_add(dp, addr, vid);
3504 "port %d failed to add %pM vid %d to fdb: %d\n",
3505 dp->index, addr, vid, err);
3508 dsa_fdb_offload_notify(switchdev_work);
3511 case SWITCHDEV_FDB_DEL_TO_DEVICE:
3512 if (switchdev_work->host_addr)
3513 err = dsa_port_bridge_host_fdb_del(dp, addr, vid);
3515 err = dsa_port_lag_fdb_del(dp, addr, vid);
3517 err = dsa_port_fdb_del(dp, addr, vid);
3520 "port %d failed to delete %pM vid %d from fdb: %d\n",
3521 dp->index, addr, vid, err);
3527 kfree(switchdev_work);
3530 static bool dsa_foreign_dev_check(const struct net_device *dev,
3531 const struct net_device *foreign_dev)
3533 const struct dsa_port *dp = dsa_user_to_port(dev);
3534 struct dsa_switch_tree *dst = dp->ds->dst;
3536 if (netif_is_bridge_master(foreign_dev))
3537 return !dsa_tree_offloads_bridge_dev(dst, foreign_dev);
3539 if (netif_is_bridge_port(foreign_dev))
3540 return !dsa_tree_offloads_bridge_port(dst, foreign_dev);
3542 /* Everything else is foreign */
3546 static int dsa_user_fdb_event(struct net_device *dev,
3547 struct net_device *orig_dev,
3548 unsigned long event, const void *ctx,
3549 const struct switchdev_notifier_fdb_info *fdb_info)
3551 struct dsa_switchdev_event_work *switchdev_work;
3552 struct dsa_port *dp = dsa_user_to_port(dev);
3553 bool host_addr = fdb_info->is_local;
3554 struct dsa_switch *ds = dp->ds;
3556 if (ctx && ctx != dp)
3562 if (switchdev_fdb_is_dynamically_learned(fdb_info)) {
3563 if (dsa_port_offloads_bridge_port(dp, orig_dev))
3566 /* FDB entries learned by the software bridge or by foreign
3567 * bridge ports should be installed as host addresses only if
3568 * the driver requests assisted learning.
3570 if (!ds->assisted_learning_on_cpu_port)
3574 /* Also treat FDB entries on foreign interfaces bridged with us as host
3577 if (dsa_foreign_dev_check(dev, orig_dev))
3580 /* Check early that we're not doing work in vain.
3581 * Host addresses on LAG ports still require regular FDB ops,
3582 * since the CPU port isn't in a LAG.
3584 if (dp->lag && !host_addr) {
3585 if (!ds->ops->lag_fdb_add || !ds->ops->lag_fdb_del)
3588 if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del)
3592 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
3593 if (!switchdev_work)
3596 netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n",
3597 event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting",
3598 orig_dev->name, fdb_info->addr, fdb_info->vid,
3599 host_addr ? " as host address" : "");
3601 INIT_WORK(&switchdev_work->work, dsa_user_switchdev_event_work);
3602 switchdev_work->event = event;
3603 switchdev_work->dev = dev;
3604 switchdev_work->orig_dev = orig_dev;
3606 ether_addr_copy(switchdev_work->addr, fdb_info->addr);
3607 switchdev_work->vid = fdb_info->vid;
3608 switchdev_work->host_addr = host_addr;
3610 dsa_schedule_work(&switchdev_work->work);
3615 /* Called under rcu_read_lock() */
3616 static int dsa_user_switchdev_event(struct notifier_block *unused,
3617 unsigned long event, void *ptr)
3619 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
3623 case SWITCHDEV_PORT_ATTR_SET:
3624 err = switchdev_handle_port_attr_set(dev, ptr,
3626 dsa_user_port_attr_set);
3627 return notifier_from_errno(err);
3628 case SWITCHDEV_FDB_ADD_TO_DEVICE:
3629 case SWITCHDEV_FDB_DEL_TO_DEVICE:
3630 err = switchdev_handle_fdb_event_to_device(dev, event, ptr,
3632 dsa_foreign_dev_check,
3633 dsa_user_fdb_event);
3634 return notifier_from_errno(err);
3642 static int dsa_user_switchdev_blocking_event(struct notifier_block *unused,
3643 unsigned long event, void *ptr)
3645 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
3649 case SWITCHDEV_PORT_OBJ_ADD:
3650 err = switchdev_handle_port_obj_add_foreign(dev, ptr,
3652 dsa_foreign_dev_check,
3653 dsa_user_port_obj_add);
3654 return notifier_from_errno(err);
3655 case SWITCHDEV_PORT_OBJ_DEL:
3656 err = switchdev_handle_port_obj_del_foreign(dev, ptr,
3658 dsa_foreign_dev_check,
3659 dsa_user_port_obj_del);
3660 return notifier_from_errno(err);
3661 case SWITCHDEV_PORT_ATTR_SET:
3662 err = switchdev_handle_port_attr_set(dev, ptr,
3664 dsa_user_port_attr_set);
3665 return notifier_from_errno(err);
3671 static struct notifier_block dsa_user_nb __read_mostly = {
3672 .notifier_call = dsa_user_netdevice_event,
3675 struct notifier_block dsa_user_switchdev_notifier = {
3676 .notifier_call = dsa_user_switchdev_event,
3679 struct notifier_block dsa_user_switchdev_blocking_notifier = {
3680 .notifier_call = dsa_user_switchdev_blocking_event,
3683 int dsa_user_register_notifier(void)
3685 struct notifier_block *nb;
3688 err = register_netdevice_notifier(&dsa_user_nb);
3692 err = register_switchdev_notifier(&dsa_user_switchdev_notifier);
3694 goto err_switchdev_nb;
3696 nb = &dsa_user_switchdev_blocking_notifier;
3697 err = register_switchdev_blocking_notifier(nb);
3699 goto err_switchdev_blocking_nb;
3703 err_switchdev_blocking_nb:
3704 unregister_switchdev_notifier(&dsa_user_switchdev_notifier);
3706 unregister_netdevice_notifier(&dsa_user_nb);
3710 void dsa_user_unregister_notifier(void)
3712 struct notifier_block *nb;
3715 nb = &dsa_user_switchdev_blocking_notifier;
3716 err = unregister_switchdev_blocking_notifier(nb);
3718 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
3720 err = unregister_switchdev_notifier(&dsa_user_switchdev_notifier);
3722 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
3724 err = unregister_netdevice_notifier(&dsa_user_nb);
3726 pr_err("DSA: failed to unregister user notifier (%d)\n", err);