1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3  * net/dsa/dsa_priv.h - Hardware switch handling
4  * Copyright (c) 2008-2009 Marvell Semiconductor
57 	const struct dsa_port *dp;  member
58 	struct dsa_bridge bridge;  member
65 	const struct dsa_port *dp;  member
81 	const struct dsa_port *dp;  member
88 	const struct dsa_port *dp;  member
96 	const struct dsa_port *dp;  member
103 	const struct dsa_port *dp;  member
114 	const struct dsa_port *dp;  member
160 	struct dsa_port		*dp;  member
182 	return ops->needed_headroom + ops->needed_tailroom;  in dsa_tag_protocol_overhead()
197 	struct dsa_port *cpu_dp = dev->dsa_ptr;  in dsa_master_find_slave()
198 	struct dsa_switch_tree *dst = cpu_dp->dst;  in dsa_master_find_slave()
199 	struct dsa_port *dp;  in dsa_master_find_slave()  local
201 	list_for_each_entry(dp, &dst->ports, list)  in dsa_master_find_slave()
202 		if (dp->ds->index == device && dp->index == port &&  in dsa_master_find_slave()
203 		    dp->type == DSA_PORT_TYPE_USER)  in dsa_master_find_slave()
204 			return dp->slave;  in dsa_master_find_slave()
213 bool dsa_port_supports_hwtstamp(struct dsa_port *dp, struct ifreq *ifr);
216 int dsa_port_set_state(struct dsa_port *dp, u8 state, bool do_fast_age);
217 int dsa_port_set_mst_state(struct dsa_port *dp,
220 int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy);
221 int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy);
222 void dsa_port_disable_rt(struct dsa_port *dp);
223 void dsa_port_disable(struct dsa_port *dp);
224 int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br,
226 void dsa_port_pre_bridge_leave(struct dsa_port *dp, struct net_device *br);
227 void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br);
228 int dsa_port_lag_change(struct dsa_port *dp,
230 int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag_dev,
233 void dsa_port_pre_lag_leave(struct dsa_port *dp, struct net_device *lag_dev);
234 void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag_dev);
235 int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
237 bool dsa_port_skip_vlan_configuration(struct dsa_port *dp);
238 int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock);
239 int dsa_port_mst_enable(struct dsa_port *dp, bool on,
241 int dsa_port_vlan_msti(struct dsa_port *dp,
243 int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu);
244 int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
246 int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr,
248 int dsa_port_standalone_host_fdb_add(struct dsa_port *dp,
250 int dsa_port_standalone_host_fdb_del(struct dsa_port *dp,
252 int dsa_port_bridge_host_fdb_add(struct dsa_port *dp, const unsigned char *addr,
254 int dsa_port_bridge_host_fdb_del(struct dsa_port *dp, const unsigned char *addr,
256 int dsa_port_lag_fdb_add(struct dsa_port *dp, const unsigned char *addr,
258 int dsa_port_lag_fdb_del(struct dsa_port *dp, const unsigned char *addr,
260 int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data);
261 int dsa_port_mdb_add(const struct dsa_port *dp,
263 int dsa_port_mdb_del(const struct dsa_port *dp,
265 int dsa_port_standalone_host_mdb_add(const struct dsa_port *dp,
267 int dsa_port_standalone_host_mdb_del(const struct dsa_port *dp,
269 int dsa_port_bridge_host_mdb_add(const struct dsa_port *dp,
271 int dsa_port_bridge_host_mdb_del(const struct dsa_port *dp,
273 int dsa_port_pre_bridge_flags(const struct dsa_port *dp,
276 int dsa_port_bridge_flags(struct dsa_port *dp,
279 int dsa_port_vlan_add(struct dsa_port *dp,
282 int dsa_port_vlan_del(struct dsa_port *dp,
284 int dsa_port_host_vlan_add(struct dsa_port *dp,
287 int dsa_port_host_vlan_del(struct dsa_port *dp,
289 int dsa_port_mrp_add(const struct dsa_port *dp,
291 int dsa_port_mrp_del(const struct dsa_port *dp,
293 int dsa_port_mrp_add_ring_role(const struct dsa_port *dp,
295 int dsa_port_mrp_del_ring_role(const struct dsa_port *dp,
297 int dsa_port_phylink_create(struct dsa_port *dp);
298 void dsa_port_phylink_destroy(struct dsa_port *dp);
299 int dsa_shared_port_link_register_of(struct dsa_port *dp);
300 void dsa_shared_port_link_unregister_of(struct dsa_port *dp);
301 int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr);
302 void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr);
303 int dsa_port_tag_8021q_vlan_add(struct dsa_port *dp, u16 vid, bool broadcast);
304 void dsa_port_tag_8021q_vlan_del(struct dsa_port *dp, u16 vid, bool broadcast);
305 void dsa_port_set_host_flood(struct dsa_port *dp, bool uc, bool mc);
306 int dsa_port_change_master(struct dsa_port *dp, struct net_device *master,
315 int dsa_slave_create(struct dsa_port *dp);
334 	return p->dp;  in dsa_slave_to_port()
340 	struct dsa_port *dp = dsa_slave_to_port(dev);  in dsa_slave_to_master()  local
342 	return dsa_port_to_master(dp);  in dsa_slave_to_master()
345 /* If under a bridge with vlan_filtering=0, make sure to send pvid-tagged
346  * frames as untagged, since the bridge will not untag them.
350 	struct dsa_port *dp = dsa_slave_to_port(skb->dev);  in dsa_untag_bridge_pvid()  local
351 	struct net_device *br = dsa_port_bridge_dev_get(dp);  in dsa_untag_bridge_pvid()
352 	struct net_device *dev = skb->dev;  in dsa_untag_bridge_pvid()
365 	if (!skb_vlan_tag_present(skb) && skb->protocol == htons(proto)) {  in dsa_untag_bridge_pvid()
376 	/* We already run under an RCU read-side critical section since  in dsa_untag_bridge_pvid()
388 	 * the bridge's data path - br_allowed_ingress() - or not.  in dsa_untag_bridge_pvid()
390 	 * default_pvid of the bridge, which will steal VLAN-tagged traffic  in dsa_untag_bridge_pvid()
391 	 * from the bridge's data path. This is a configuration that DSA  in dsa_untag_bridge_pvid()
405  * to support termination through the bridge.
410 	struct dsa_port *cpu_dp = master->dsa_ptr;  in dsa_find_designated_bridge_port_by_vid()
411 	struct dsa_switch_tree *dst = cpu_dp->dst;  in dsa_find_designated_bridge_port_by_vid()
414 	struct dsa_port *dp;  in dsa_find_designated_bridge_port_by_vid()  local
417 	list_for_each_entry(dp, &dst->ports, list) {  in dsa_find_designated_bridge_port_by_vid()
418 		if (dp->type != DSA_PORT_TYPE_USER)  in dsa_find_designated_bridge_port_by_vid()
421 		if (!dp->bridge)  in dsa_find_designated_bridge_port_by_vid()
424 		if (dp->stp_state != BR_STATE_LEARNING &&  in dsa_find_designated_bridge_port_by_vid()
425 		    dp->stp_state != BR_STATE_FORWARDING)  in dsa_find_designated_bridge_port_by_vid()
428 		/* Since the bridge might learn this packet, keep the CPU port  in dsa_find_designated_bridge_port_by_vid()
432 		if (dp->cpu_dp != cpu_dp)  in dsa_find_designated_bridge_port_by_vid()
435 		slave = dp->slave;  in dsa_find_designated_bridge_port_by_vid()
447 /* If the ingress port offloads the bridge, we mark the frame as autonomously
448  * forwarded by hardware, so the software bridge doesn't forward in twice, back
450  * software bridging, we are not offloading it, therefore the dp->bridge
456 	struct dsa_port *dp = dsa_slave_to_port(skb->dev);  in dsa_default_offload_fwd_mark()  local
458 	skb->offload_fwd_mark = !!(dp->bridge);  in dsa_default_offload_fwd_mark()
463  *                                                                 skb->data
467  * +-----------------------+-----------------------+---------------+-------+
469  * +-----------------------+-----------------------+---------------+-------+
471  * <----- len ----->                               <----- len ----->
475  *       >>>>>>>   +-----------------------+-----------------------+-------+
477  *                 +-----------------------+-----------------------+-------+
480  *                                                                 skb->data
484 	memmove(skb->data - ETH_HLEN, skb->data - ETH_HLEN - len, 2 * ETH_ALEN);  in dsa_strip_etype_header()
493  * ^     <<<<<<<   +-----------------------+-----------------------+-------+
495  * |               +-----------------------+-----------------------+-------+
496  * <----- len ----->
499  * skb->data
504  * +-----------------------+-----------------------+---------------+-------+
506  * +-----------------------+-----------------------+---------------+-------+
508  * |                                               <----- len ----->
509  * skb->data
513 	memmove(skb->data, skb->data + len, 2 * ETH_ALEN);  in dsa_alloc_etype_header()
517  * skb_mac_header(skb), which leaves skb->data pointing at the first byte after
521  * is located 2 bytes behind skb->data. Note that EtherType in this context
527 	return skb->data - 2;  in dsa_etype_header_pos_rx()
530 /* On TX, skb->data points to skb_mac_header(skb), which means that EtherType
536 	return skb->data + 2 * ETH_ALEN;  in dsa_etype_header_pos_tx()
545 	return ds->ops->port_fdb_add && ds->ops->port_fdb_del &&  in dsa_switch_supports_uc_filtering()
546 	       ds->fdb_isolation && !ds->vlan_filtering_is_global &&  in dsa_switch_supports_uc_filtering()
547 	       !ds->needs_standalone_vlan_filtering;  in dsa_switch_supports_uc_filtering()
552 	return ds->ops->port_mdb_add && ds->ops->port_mdb_del &&  in dsa_switch_supports_mc_filtering()
553 	       ds->fdb_isolation && !ds->vlan_filtering_is_global &&  in dsa_switch_supports_mc_filtering()
554 	       !ds->needs_standalone_vlan_filtering;  in dsa_switch_supports_mc_filtering()