1 // SPDX-License-Identifier: GPL-2.0+
2 /* Microchip Sparx5 Switch driver
4 * Copyright (c) 2021 Microchip Technology Inc. and its subsidiaries.
7 #include <linux/if_bridge.h>
8 #include <net/switchdev.h>
10 #include "sparx5_main_regs.h"
11 #include "sparx5_main.h"
13 static struct workqueue_struct *sparx5_owq;
15 struct sparx5_switchdev_event_work {
16 struct work_struct work;
17 struct switchdev_notifier_fdb_info fdb_info;
18 struct net_device *dev;
19 struct sparx5 *sparx5;
23 static int sparx5_port_attr_pre_bridge_flags(struct sparx5_port *port,
24 struct switchdev_brport_flags flags)
26 if (flags.mask & ~(BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD))
32 static void sparx5_port_attr_bridge_flags(struct sparx5_port *port,
33 struct switchdev_brport_flags flags)
37 if (flags.mask & BR_MCAST_FLOOD)
38 for (pgid = PGID_MC_FLOOD; pgid <= PGID_IPV6_MC_CTRL; pgid++)
39 sparx5_pgid_update_mask(port, pgid, !!(flags.val & BR_MCAST_FLOOD));
40 if (flags.mask & BR_FLOOD)
41 sparx5_pgid_update_mask(port, PGID_UC_FLOOD, !!(flags.val & BR_FLOOD));
42 if (flags.mask & BR_BCAST_FLOOD)
43 sparx5_pgid_update_mask(port, PGID_BCAST, !!(flags.val & BR_BCAST_FLOOD));
46 static void sparx5_attr_stp_state_set(struct sparx5_port *port,
49 struct sparx5 *sparx5 = port->sparx5;
51 if (!test_bit(port->portno, sparx5->bridge_mask)) {
52 netdev_err(port->ndev,
53 "Controlling non-bridged port %d?\n", port->portno);
58 case BR_STATE_FORWARDING:
59 set_bit(port->portno, sparx5->bridge_fwd_mask);
61 case BR_STATE_LEARNING:
62 set_bit(port->portno, sparx5->bridge_lrn_mask);
66 /* All other states treated as blocking */
67 clear_bit(port->portno, sparx5->bridge_fwd_mask);
68 clear_bit(port->portno, sparx5->bridge_lrn_mask);
72 /* apply the bridge_fwd_mask to all the ports */
73 sparx5_update_fwd(sparx5);
76 static void sparx5_port_attr_ageing_set(struct sparx5_port *port,
77 unsigned long ageing_clock_t)
79 unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock_t);
80 u32 ageing_time = jiffies_to_msecs(ageing_jiffies);
82 sparx5_set_ageing(port->sparx5, ageing_time);
85 static int sparx5_port_attr_set(struct net_device *dev, const void *ctx,
86 const struct switchdev_attr *attr,
87 struct netlink_ext_ack *extack)
89 struct sparx5_port *port = netdev_priv(dev);
92 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
93 return sparx5_port_attr_pre_bridge_flags(port,
94 attr->u.brport_flags);
95 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
96 sparx5_port_attr_bridge_flags(port, attr->u.brport_flags);
98 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
99 sparx5_attr_stp_state_set(port, attr->u.stp_state);
101 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
102 sparx5_port_attr_ageing_set(port, attr->u.ageing_time);
104 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
105 /* Used PVID 1 when default_pvid is 0, to avoid
106 * collision with non-bridged ports.
110 port->vlan_aware = attr->u.vlan_filtering;
111 sparx5_vlan_port_apply(port->sparx5, port);
120 static int sparx5_port_bridge_join(struct sparx5_port *port,
121 struct net_device *bridge,
122 struct netlink_ext_ack *extack)
124 struct sparx5 *sparx5 = port->sparx5;
125 struct net_device *ndev = port->ndev;
128 if (bitmap_empty(sparx5->bridge_mask, SPX5_PORTS))
129 /* First bridged port */
130 sparx5->hw_bridge_dev = bridge;
132 if (sparx5->hw_bridge_dev != bridge)
133 /* This is adding the port to a second bridge, this is
138 set_bit(port->portno, sparx5->bridge_mask);
140 err = switchdev_bridge_port_offload(ndev, ndev, NULL, NULL, NULL,
143 goto err_switchdev_offload;
145 /* Remove standalone port entry */
146 sparx5_mact_forget(sparx5, ndev->dev_addr, 0);
148 /* Port enters in bridge mode therefor don't need to copy to CPU
149 * frames for multicast in case the bridge is not requesting them
151 __dev_mc_unsync(ndev, sparx5_mc_unsync);
155 err_switchdev_offload:
156 clear_bit(port->portno, sparx5->bridge_mask);
160 static void sparx5_port_bridge_leave(struct sparx5_port *port,
161 struct net_device *bridge)
163 struct sparx5 *sparx5 = port->sparx5;
165 switchdev_bridge_port_unoffload(port->ndev, NULL, NULL, NULL);
167 clear_bit(port->portno, sparx5->bridge_mask);
168 if (bitmap_empty(sparx5->bridge_mask, SPX5_PORTS))
169 sparx5->hw_bridge_dev = NULL;
171 /* Clear bridge vlan settings before updating the port settings */
172 port->vlan_aware = 0;
173 port->pvid = NULL_VID;
174 port->vid = NULL_VID;
176 /* Forward frames to CPU */
177 sparx5_mact_learn(sparx5, PGID_CPU, port->ndev->dev_addr, 0);
179 /* Port enters in host more therefore restore mc list */
180 __dev_mc_sync(port->ndev, sparx5_mc_sync, sparx5_mc_unsync);
183 static int sparx5_port_changeupper(struct net_device *dev,
184 struct netdev_notifier_changeupper_info *info)
186 struct sparx5_port *port = netdev_priv(dev);
187 struct netlink_ext_ack *extack;
190 extack = netdev_notifier_info_to_extack(&info->info);
192 if (netif_is_bridge_master(info->upper_dev)) {
194 err = sparx5_port_bridge_join(port, info->upper_dev,
197 sparx5_port_bridge_leave(port, info->upper_dev);
199 sparx5_vlan_port_apply(port->sparx5, port);
205 static int sparx5_port_add_addr(struct net_device *dev, bool up)
207 struct sparx5_port *port = netdev_priv(dev);
208 struct sparx5 *sparx5 = port->sparx5;
209 u16 vid = port->pvid;
212 sparx5_mact_learn(sparx5, PGID_CPU, port->ndev->dev_addr, vid);
214 sparx5_mact_forget(sparx5, port->ndev->dev_addr, vid);
219 static int sparx5_netdevice_port_event(struct net_device *dev,
220 struct notifier_block *nb,
221 unsigned long event, void *ptr)
225 if (!sparx5_netdevice_check(dev))
229 case NETDEV_CHANGEUPPER:
230 err = sparx5_port_changeupper(dev, ptr);
233 err = sparx5_port_add_addr(dev, true);
236 err = sparx5_port_add_addr(dev, false);
243 static int sparx5_netdevice_event(struct notifier_block *nb,
244 unsigned long event, void *ptr)
246 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
249 ret = sparx5_netdevice_port_event(dev, nb, event, ptr);
251 return notifier_from_errno(ret);
254 static void sparx5_switchdev_bridge_fdb_event_work(struct work_struct *work)
256 struct sparx5_switchdev_event_work *switchdev_work =
257 container_of(work, struct sparx5_switchdev_event_work, work);
258 struct net_device *dev = switchdev_work->dev;
259 struct switchdev_notifier_fdb_info *fdb_info;
260 struct sparx5_port *port;
261 struct sparx5 *sparx5;
266 if (!sparx5_netdevice_check(dev)) {
268 sparx5 = switchdev_work->sparx5;
271 sparx5 = switchdev_work->sparx5;
272 port = netdev_priv(dev);
275 fdb_info = &switchdev_work->fdb_info;
277 /* Used PVID 1 when default_pvid is 0, to avoid
278 * collision with non-bridged ports.
280 if (fdb_info->vid == 0)
285 switch (switchdev_work->event) {
286 case SWITCHDEV_FDB_ADD_TO_DEVICE:
288 sparx5_add_mact_entry(sparx5, dev, PGID_CPU,
289 fdb_info->addr, vid);
291 sparx5_add_mact_entry(sparx5, port->ndev, port->portno,
292 fdb_info->addr, vid);
294 case SWITCHDEV_FDB_DEL_TO_DEVICE:
295 sparx5_del_mact_entry(sparx5, fdb_info->addr, vid);
300 kfree(switchdev_work->fdb_info.addr);
301 kfree(switchdev_work);
305 static void sparx5_schedule_work(struct work_struct *work)
307 queue_work(sparx5_owq, work);
310 static int sparx5_switchdev_event(struct notifier_block *nb,
311 unsigned long event, void *ptr)
313 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
314 struct sparx5_switchdev_event_work *switchdev_work;
315 struct switchdev_notifier_fdb_info *fdb_info;
316 struct switchdev_notifier_info *info = ptr;
320 spx5 = container_of(nb, struct sparx5, switchdev_nb);
323 case SWITCHDEV_PORT_ATTR_SET:
324 err = switchdev_handle_port_attr_set(dev, ptr,
325 sparx5_netdevice_check,
326 sparx5_port_attr_set);
327 return notifier_from_errno(err);
328 case SWITCHDEV_FDB_ADD_TO_DEVICE:
330 case SWITCHDEV_FDB_DEL_TO_DEVICE:
331 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
335 switchdev_work->dev = dev;
336 switchdev_work->event = event;
337 switchdev_work->sparx5 = spx5;
339 fdb_info = container_of(info,
340 struct switchdev_notifier_fdb_info,
342 INIT_WORK(&switchdev_work->work,
343 sparx5_switchdev_bridge_fdb_event_work);
344 memcpy(&switchdev_work->fdb_info, ptr,
345 sizeof(switchdev_work->fdb_info));
346 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
347 if (!switchdev_work->fdb_info.addr)
350 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
354 sparx5_schedule_work(&switchdev_work->work);
360 kfree(switchdev_work);
364 static int sparx5_handle_port_vlan_add(struct net_device *dev,
365 struct notifier_block *nb,
366 const struct switchdev_obj_port_vlan *v)
368 struct sparx5_port *port = netdev_priv(dev);
370 if (netif_is_bridge_master(dev)) {
371 struct sparx5 *sparx5 =
372 container_of(nb, struct sparx5,
373 switchdev_blocking_nb);
375 /* Flood broadcast to CPU */
376 sparx5_mact_learn(sparx5, PGID_BCAST, dev->broadcast,
381 if (!sparx5_netdevice_check(dev))
384 return sparx5_vlan_vid_add(port, v->vid,
385 v->flags & BRIDGE_VLAN_INFO_PVID,
386 v->flags & BRIDGE_VLAN_INFO_UNTAGGED);
389 static int sparx5_handle_port_mdb_add(struct net_device *dev,
390 struct notifier_block *nb,
391 const struct switchdev_obj_port_mdb *v)
393 struct sparx5_port *port = netdev_priv(dev);
394 struct sparx5 *spx5 = port->sparx5;
399 if (!sparx5_netdevice_check(dev))
402 if (netif_is_bridge_master(v->obj.orig_dev)) {
403 sparx5_mact_learn(spx5, PGID_CPU, v->addr, v->vid);
407 /* When VLAN unaware the vlan value is not parsed and we receive vid 0.
408 * Fall back to bridge vid 1.
410 if (!br_vlan_enabled(spx5->hw_bridge_dev))
415 res = sparx5_mact_find(spx5, v->addr, vid, &mact_entry);
418 pgid_idx = LRN_MAC_ACCESS_CFG_2_MAC_ENTRY_ADDR_GET(mact_entry);
420 /* MC_IDX starts after the port masks in the PGID table */
421 pgid_idx += SPX5_PORTS;
422 sparx5_pgid_update_mask(port, pgid_idx, true);
424 err = sparx5_pgid_alloc_mcast(spx5, &pgid_idx);
426 netdev_warn(dev, "multicast pgid table full\n");
429 sparx5_pgid_update_mask(port, pgid_idx, true);
430 err = sparx5_mact_learn(spx5, pgid_idx, v->addr, vid);
432 netdev_warn(dev, "could not learn mac address %pM\n", v->addr);
433 sparx5_pgid_update_mask(port, pgid_idx, false);
441 static int sparx5_mdb_del_entry(struct net_device *dev,
443 const unsigned char mac[ETH_ALEN],
449 err = sparx5_mact_forget(spx5, mac, vid);
451 netdev_warn(dev, "could not forget mac address %pM", mac);
454 err = sparx5_pgid_free(spx5, pgid_idx);
456 netdev_err(dev, "attempted to free already freed pgid\n");
462 static int sparx5_handle_port_mdb_del(struct net_device *dev,
463 struct notifier_block *nb,
464 const struct switchdev_obj_port_mdb *v)
466 struct sparx5_port *port = netdev_priv(dev);
467 struct sparx5 *spx5 = port->sparx5;
469 u32 mact_entry, res, pgid_entry[3];
472 if (!sparx5_netdevice_check(dev))
475 if (netif_is_bridge_master(v->obj.orig_dev)) {
476 sparx5_mact_forget(spx5, v->addr, v->vid);
480 if (!br_vlan_enabled(spx5->hw_bridge_dev))
485 res = sparx5_mact_find(spx5, v->addr, vid, &mact_entry);
488 pgid_idx = LRN_MAC_ACCESS_CFG_2_MAC_ENTRY_ADDR_GET(mact_entry);
490 /* MC_IDX starts after the port masks in the PGID table */
491 pgid_idx += SPX5_PORTS;
492 sparx5_pgid_update_mask(port, pgid_idx, false);
494 sparx5_pgid_read_mask(spx5, pgid_idx, pgid_entry);
495 if (bitmap_empty((unsigned long *)pgid_entry, SPX5_PORTS)) {
496 /* No ports are in MC group. Remove entry */
497 err = sparx5_mdb_del_entry(dev, spx5, v->addr, vid, pgid_idx);
506 static int sparx5_handle_port_obj_add(struct net_device *dev,
507 struct notifier_block *nb,
508 struct switchdev_notifier_port_obj_info *info)
510 const struct switchdev_obj *obj = info->obj;
514 case SWITCHDEV_OBJ_ID_PORT_VLAN:
515 err = sparx5_handle_port_vlan_add(dev, nb,
516 SWITCHDEV_OBJ_PORT_VLAN(obj));
518 case SWITCHDEV_OBJ_ID_PORT_MDB:
519 case SWITCHDEV_OBJ_ID_HOST_MDB:
520 err = sparx5_handle_port_mdb_add(dev, nb,
521 SWITCHDEV_OBJ_PORT_MDB(obj));
528 info->handled = true;
532 static int sparx5_handle_port_vlan_del(struct net_device *dev,
533 struct notifier_block *nb,
536 struct sparx5_port *port = netdev_priv(dev);
540 if (netif_is_bridge_master(dev)) {
541 struct sparx5 *sparx5 =
542 container_of(nb, struct sparx5,
543 switchdev_blocking_nb);
545 sparx5_mact_forget(sparx5, dev->broadcast, vid);
549 if (!sparx5_netdevice_check(dev))
552 ret = sparx5_vlan_vid_del(port, vid);
559 static int sparx5_handle_port_obj_del(struct net_device *dev,
560 struct notifier_block *nb,
561 struct switchdev_notifier_port_obj_info *info)
563 const struct switchdev_obj *obj = info->obj;
567 case SWITCHDEV_OBJ_ID_PORT_VLAN:
568 err = sparx5_handle_port_vlan_del(dev, nb,
569 SWITCHDEV_OBJ_PORT_VLAN(obj)->vid);
571 case SWITCHDEV_OBJ_ID_PORT_MDB:
572 case SWITCHDEV_OBJ_ID_HOST_MDB:
573 err = sparx5_handle_port_mdb_del(dev, nb,
574 SWITCHDEV_OBJ_PORT_MDB(obj));
581 info->handled = true;
585 static int sparx5_switchdev_blocking_event(struct notifier_block *nb,
589 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
593 case SWITCHDEV_PORT_OBJ_ADD:
594 err = sparx5_handle_port_obj_add(dev, nb, ptr);
595 return notifier_from_errno(err);
596 case SWITCHDEV_PORT_OBJ_DEL:
597 err = sparx5_handle_port_obj_del(dev, nb, ptr);
598 return notifier_from_errno(err);
599 case SWITCHDEV_PORT_ATTR_SET:
600 err = switchdev_handle_port_attr_set(dev, ptr,
601 sparx5_netdevice_check,
602 sparx5_port_attr_set);
603 return notifier_from_errno(err);
609 int sparx5_register_notifier_blocks(struct sparx5 *s5)
613 s5->netdevice_nb.notifier_call = sparx5_netdevice_event;
614 err = register_netdevice_notifier(&s5->netdevice_nb);
618 s5->switchdev_nb.notifier_call = sparx5_switchdev_event;
619 err = register_switchdev_notifier(&s5->switchdev_nb);
621 goto err_switchdev_nb;
623 s5->switchdev_blocking_nb.notifier_call = sparx5_switchdev_blocking_event;
624 err = register_switchdev_blocking_notifier(&s5->switchdev_blocking_nb);
626 goto err_switchdev_blocking_nb;
628 sparx5_owq = alloc_ordered_workqueue("sparx5_order", 0);
631 goto err_switchdev_blocking_nb;
636 err_switchdev_blocking_nb:
637 unregister_switchdev_notifier(&s5->switchdev_nb);
639 unregister_netdevice_notifier(&s5->netdevice_nb);
644 void sparx5_unregister_notifier_blocks(struct sparx5 *s5)
646 destroy_workqueue(sparx5_owq);
648 unregister_switchdev_blocking_notifier(&s5->switchdev_blocking_nb);
649 unregister_switchdev_notifier(&s5->switchdev_nb);
650 unregister_netdevice_notifier(&s5->netdevice_nb);