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
10 #include <linux/if_bridge.h>
11 #include <linux/phy.h>
12 #include <linux/netdevice.h>
13 #include <linux/netpoll.h>
15 #include <net/gro_cells.h>
17 #define DSA_MAX_NUM_OFFLOADING_BRIDGES BITS_PER_LONG
20 DSA_NOTIFIER_AGEING_TIME
,
21 DSA_NOTIFIER_BRIDGE_JOIN
,
22 DSA_NOTIFIER_BRIDGE_LEAVE
,
25 DSA_NOTIFIER_HOST_FDB_ADD
,
26 DSA_NOTIFIER_HOST_FDB_DEL
,
27 DSA_NOTIFIER_HSR_JOIN
,
28 DSA_NOTIFIER_HSR_LEAVE
,
29 DSA_NOTIFIER_LAG_CHANGE
,
30 DSA_NOTIFIER_LAG_JOIN
,
31 DSA_NOTIFIER_LAG_LEAVE
,
34 DSA_NOTIFIER_HOST_MDB_ADD
,
35 DSA_NOTIFIER_HOST_MDB_DEL
,
36 DSA_NOTIFIER_VLAN_ADD
,
37 DSA_NOTIFIER_VLAN_DEL
,
39 DSA_NOTIFIER_TAG_PROTO
,
42 DSA_NOTIFIER_MRP_ADD_RING_ROLE
,
43 DSA_NOTIFIER_MRP_DEL_RING_ROLE
,
44 DSA_NOTIFIER_TAG_8021Q_VLAN_ADD
,
45 DSA_NOTIFIER_TAG_8021Q_VLAN_DEL
,
48 /* DSA_NOTIFIER_AGEING_TIME */
49 struct dsa_notifier_ageing_time_info
{
50 unsigned int ageing_time
;
53 /* DSA_NOTIFIER_BRIDGE_* */
54 struct dsa_notifier_bridge_info
{
55 struct net_device
*br
;
61 /* DSA_NOTIFIER_FDB_* */
62 struct dsa_notifier_fdb_info
{
65 const unsigned char *addr
;
69 /* DSA_NOTIFIER_MDB_* */
70 struct dsa_notifier_mdb_info
{
71 const struct switchdev_obj_port_mdb
*mdb
;
76 /* DSA_NOTIFIER_LAG_* */
77 struct dsa_notifier_lag_info
{
78 struct net_device
*lag
;
82 struct netdev_lag_upper_info
*info
;
85 /* DSA_NOTIFIER_VLAN_* */
86 struct dsa_notifier_vlan_info
{
87 const struct switchdev_obj_port_vlan
*vlan
;
90 struct netlink_ext_ack
*extack
;
93 /* DSA_NOTIFIER_MTU */
94 struct dsa_notifier_mtu_info
{
101 /* DSA_NOTIFIER_TAG_PROTO_* */
102 struct dsa_notifier_tag_proto_info
{
103 const struct dsa_device_ops
*tag_ops
;
106 /* DSA_NOTIFIER_MRP_* */
107 struct dsa_notifier_mrp_info
{
108 const struct switchdev_obj_mrp
*mrp
;
113 /* DSA_NOTIFIER_MRP_* */
114 struct dsa_notifier_mrp_ring_role_info
{
115 const struct switchdev_obj_ring_role_mrp
*mrp
;
120 /* DSA_NOTIFIER_TAG_8021Q_VLAN_* */
121 struct dsa_notifier_tag_8021q_vlan_info
{
128 struct dsa_switchdev_event_work
{
129 struct dsa_switch
*ds
;
131 struct net_device
*dev
;
132 struct work_struct work
;
134 /* Specific for SWITCHDEV_FDB_ADD_TO_DEVICE and
135 * SWITCHDEV_FDB_DEL_TO_DEVICE
137 unsigned char addr
[ETH_ALEN
];
142 /* DSA_NOTIFIER_HSR_* */
143 struct dsa_notifier_hsr_info
{
144 struct net_device
*hsr
;
149 struct dsa_slave_priv
{
150 /* Copy of CPU port xmit for faster access in slave transmit hot path */
151 struct sk_buff
* (*xmit
)(struct sk_buff
*skb
,
152 struct net_device
*dev
);
154 struct gro_cells gcells
;
156 /* DSA port data, such as switch, port index, etc. */
159 #ifdef CONFIG_NET_POLL_CONTROLLER
160 struct netpoll
*netpoll
;
164 struct list_head mall_tc_list
;
168 const struct dsa_device_ops
*dsa_tag_driver_get(int tag_protocol
);
169 void dsa_tag_driver_put(const struct dsa_device_ops
*ops
);
170 const struct dsa_device_ops
*dsa_find_tagger_by_name(const char *buf
);
172 bool dsa_schedule_work(struct work_struct
*work
);
173 const char *dsa_tag_protocol_to_str(const struct dsa_device_ops
*ops
);
175 static inline int dsa_tag_protocol_overhead(const struct dsa_device_ops
*ops
)
177 return ops
->needed_headroom
+ ops
->needed_tailroom
;
181 int dsa_master_setup(struct net_device
*dev
, struct dsa_port
*cpu_dp
);
182 void dsa_master_teardown(struct net_device
*dev
);
184 static inline struct net_device
*dsa_master_find_slave(struct net_device
*dev
,
185 int device
, int port
)
187 struct dsa_port
*cpu_dp
= dev
->dsa_ptr
;
188 struct dsa_switch_tree
*dst
= cpu_dp
->dst
;
191 list_for_each_entry(dp
, &dst
->ports
, list
)
192 if (dp
->ds
->index
== device
&& dp
->index
== port
&&
193 dp
->type
== DSA_PORT_TYPE_USER
)
200 void dsa_port_set_tag_protocol(struct dsa_port
*cpu_dp
,
201 const struct dsa_device_ops
*tag_ops
);
202 int dsa_port_set_state(struct dsa_port
*dp
, u8 state
, bool do_fast_age
);
203 int dsa_port_enable_rt(struct dsa_port
*dp
, struct phy_device
*phy
);
204 int dsa_port_enable(struct dsa_port
*dp
, struct phy_device
*phy
);
205 void dsa_port_disable_rt(struct dsa_port
*dp
);
206 void dsa_port_disable(struct dsa_port
*dp
);
207 int dsa_port_bridge_join(struct dsa_port
*dp
, struct net_device
*br
,
208 struct netlink_ext_ack
*extack
);
209 void dsa_port_pre_bridge_leave(struct dsa_port
*dp
, struct net_device
*br
);
210 void dsa_port_bridge_leave(struct dsa_port
*dp
, struct net_device
*br
);
211 int dsa_port_lag_change(struct dsa_port
*dp
,
212 struct netdev_lag_lower_state_info
*linfo
);
213 int dsa_port_lag_join(struct dsa_port
*dp
, struct net_device
*lag_dev
,
214 struct netdev_lag_upper_info
*uinfo
,
215 struct netlink_ext_ack
*extack
);
216 void dsa_port_pre_lag_leave(struct dsa_port
*dp
, struct net_device
*lag_dev
);
217 void dsa_port_lag_leave(struct dsa_port
*dp
, struct net_device
*lag_dev
);
218 int dsa_port_vlan_filtering(struct dsa_port
*dp
, bool vlan_filtering
,
219 struct netlink_ext_ack
*extack
);
220 bool dsa_port_skip_vlan_configuration(struct dsa_port
*dp
);
221 int dsa_port_ageing_time(struct dsa_port
*dp
, clock_t ageing_clock
);
222 int dsa_port_mtu_change(struct dsa_port
*dp
, int new_mtu
,
223 bool targeted_match
);
224 int dsa_port_fdb_add(struct dsa_port
*dp
, const unsigned char *addr
,
226 int dsa_port_fdb_del(struct dsa_port
*dp
, const unsigned char *addr
,
228 int dsa_port_host_fdb_add(struct dsa_port
*dp
, const unsigned char *addr
,
230 int dsa_port_host_fdb_del(struct dsa_port
*dp
, const unsigned char *addr
,
232 int dsa_port_fdb_dump(struct dsa_port
*dp
, dsa_fdb_dump_cb_t
*cb
, void *data
);
233 int dsa_port_mdb_add(const struct dsa_port
*dp
,
234 const struct switchdev_obj_port_mdb
*mdb
);
235 int dsa_port_mdb_del(const struct dsa_port
*dp
,
236 const struct switchdev_obj_port_mdb
*mdb
);
237 int dsa_port_host_mdb_add(const struct dsa_port
*dp
,
238 const struct switchdev_obj_port_mdb
*mdb
);
239 int dsa_port_host_mdb_del(const struct dsa_port
*dp
,
240 const struct switchdev_obj_port_mdb
*mdb
);
241 int dsa_port_pre_bridge_flags(const struct dsa_port
*dp
,
242 struct switchdev_brport_flags flags
,
243 struct netlink_ext_ack
*extack
);
244 int dsa_port_bridge_flags(struct dsa_port
*dp
,
245 struct switchdev_brport_flags flags
,
246 struct netlink_ext_ack
*extack
);
247 int dsa_port_vlan_add(struct dsa_port
*dp
,
248 const struct switchdev_obj_port_vlan
*vlan
,
249 struct netlink_ext_ack
*extack
);
250 int dsa_port_vlan_del(struct dsa_port
*dp
,
251 const struct switchdev_obj_port_vlan
*vlan
);
252 int dsa_port_mrp_add(const struct dsa_port
*dp
,
253 const struct switchdev_obj_mrp
*mrp
);
254 int dsa_port_mrp_del(const struct dsa_port
*dp
,
255 const struct switchdev_obj_mrp
*mrp
);
256 int dsa_port_mrp_add_ring_role(const struct dsa_port
*dp
,
257 const struct switchdev_obj_ring_role_mrp
*mrp
);
258 int dsa_port_mrp_del_ring_role(const struct dsa_port
*dp
,
259 const struct switchdev_obj_ring_role_mrp
*mrp
);
260 int dsa_port_link_register_of(struct dsa_port
*dp
);
261 void dsa_port_link_unregister_of(struct dsa_port
*dp
);
262 int dsa_port_hsr_join(struct dsa_port
*dp
, struct net_device
*hsr
);
263 void dsa_port_hsr_leave(struct dsa_port
*dp
, struct net_device
*hsr
);
264 int dsa_port_tag_8021q_vlan_add(struct dsa_port
*dp
, u16 vid
, bool broadcast
);
265 void dsa_port_tag_8021q_vlan_del(struct dsa_port
*dp
, u16 vid
, bool broadcast
);
266 extern const struct phylink_mac_ops dsa_port_phylink_mac_ops
;
268 static inline bool dsa_port_offloads_bridge_port(struct dsa_port
*dp
,
269 const struct net_device
*dev
)
271 return dsa_port_to_bridge_port(dp
) == dev
;
274 static inline bool dsa_port_offloads_bridge(struct dsa_port
*dp
,
275 const struct net_device
*bridge_dev
)
277 /* DSA ports connected to a bridge, and event was emitted
280 return dp
->bridge_dev
== bridge_dev
;
283 /* Returns true if any port of this tree offloads the given net_device */
284 static inline bool dsa_tree_offloads_bridge_port(struct dsa_switch_tree
*dst
,
285 const struct net_device
*dev
)
289 list_for_each_entry(dp
, &dst
->ports
, list
)
290 if (dsa_port_offloads_bridge_port(dp
, dev
))
296 /* Returns true if any port of this tree offloads the given bridge */
297 static inline bool dsa_tree_offloads_bridge(struct dsa_switch_tree
*dst
,
298 const struct net_device
*bridge_dev
)
302 list_for_each_entry(dp
, &dst
->ports
, list
)
303 if (dsa_port_offloads_bridge(dp
, bridge_dev
))
310 extern const struct dsa_device_ops notag_netdev_ops
;
311 extern struct notifier_block dsa_slave_switchdev_notifier
;
312 extern struct notifier_block dsa_slave_switchdev_blocking_notifier
;
314 void dsa_slave_mii_bus_init(struct dsa_switch
*ds
);
315 int dsa_slave_create(struct dsa_port
*dp
);
316 void dsa_slave_destroy(struct net_device
*slave_dev
);
317 int dsa_slave_suspend(struct net_device
*slave_dev
);
318 int dsa_slave_resume(struct net_device
*slave_dev
);
319 int dsa_slave_register_notifier(void);
320 void dsa_slave_unregister_notifier(void);
321 void dsa_slave_setup_tagger(struct net_device
*slave
);
322 int dsa_slave_change_mtu(struct net_device
*dev
, int new_mtu
);
323 int dsa_slave_manage_vlan_filtering(struct net_device
*dev
,
324 bool vlan_filtering
);
326 static inline struct dsa_port
*dsa_slave_to_port(const struct net_device
*dev
)
328 struct dsa_slave_priv
*p
= netdev_priv(dev
);
333 static inline struct net_device
*
334 dsa_slave_to_master(const struct net_device
*dev
)
336 struct dsa_port
*dp
= dsa_slave_to_port(dev
);
338 return dp
->cpu_dp
->master
;
341 /* If under a bridge with vlan_filtering=0, make sure to send pvid-tagged
342 * frames as untagged, since the bridge will not untag them.
344 static inline struct sk_buff
*dsa_untag_bridge_pvid(struct sk_buff
*skb
)
346 struct dsa_port
*dp
= dsa_slave_to_port(skb
->dev
);
347 struct net_device
*br
= dp
->bridge_dev
;
348 struct net_device
*dev
= skb
->dev
;
349 struct net_device
*upper_dev
;
350 u16 vid
, pvid
, proto
;
353 if (!br
|| br_vlan_enabled(br
))
356 err
= br_vlan_get_proto(br
, &proto
);
360 /* Move VLAN tag from data to hwaccel */
361 if (!skb_vlan_tag_present(skb
) && skb
->protocol
== htons(proto
)) {
362 skb
= skb_vlan_untag(skb
);
367 if (!skb_vlan_tag_present(skb
))
370 vid
= skb_vlan_tag_get_id(skb
);
372 /* We already run under an RCU read-side critical section since
373 * we are called from netif_receive_skb_list_internal().
375 err
= br_vlan_get_pvid_rcu(dev
, &pvid
);
382 /* The sad part about attempting to untag from DSA is that we
383 * don't know, unless we check, if the skb will end up in
384 * the bridge's data path - br_allowed_ingress() - or not.
385 * For example, there might be an 8021q upper for the
386 * default_pvid of the bridge, which will steal VLAN-tagged traffic
387 * from the bridge's data path. This is a configuration that DSA
388 * supports because vlan_filtering is 0. In that case, we should
389 * definitely keep the tag, to make sure it keeps working.
391 upper_dev
= __vlan_find_dev_deep_rcu(br
, htons(proto
), vid
);
395 __vlan_hwaccel_clear_tag(skb
);
400 /* For switches without hardware support for DSA tagging to be able
401 * to support termination through the bridge.
403 static inline struct net_device
*
404 dsa_find_designated_bridge_port_by_vid(struct net_device
*master
, u16 vid
)
406 struct dsa_port
*cpu_dp
= master
->dsa_ptr
;
407 struct dsa_switch_tree
*dst
= cpu_dp
->dst
;
408 struct bridge_vlan_info vinfo
;
409 struct net_device
*slave
;
413 list_for_each_entry(dp
, &dst
->ports
, list
) {
414 if (dp
->type
!= DSA_PORT_TYPE_USER
)
420 if (dp
->stp_state
!= BR_STATE_LEARNING
&&
421 dp
->stp_state
!= BR_STATE_FORWARDING
)
424 /* Since the bridge might learn this packet, keep the CPU port
425 * affinity with the port that will be used for the reply on
428 if (dp
->cpu_dp
!= cpu_dp
)
433 err
= br_vlan_get_info_rcu(slave
, vid
, &vinfo
);
443 /* If the ingress port offloads the bridge, we mark the frame as autonomously
444 * forwarded by hardware, so the software bridge doesn't forward in twice, back
445 * to us, because we already did. However, if we're in fallback mode and we do
446 * software bridging, we are not offloading it, therefore the dp->bridge_dev
447 * pointer is not populated, and flooding needs to be done by software (we are
448 * effectively operating in standalone ports mode).
450 static inline void dsa_default_offload_fwd_mark(struct sk_buff
*skb
)
452 struct dsa_port
*dp
= dsa_slave_to_port(skb
->dev
);
454 skb
->offload_fwd_mark
= !!(dp
->bridge_dev
);
457 /* Helper for removing DSA header tags from packets in the RX path.
458 * Must not be called before skb_pull(len).
462 * | | | | | | | | | | | | | | | | | | |
463 * +-----------------------+-----------------------+---------------+-------+
464 * | Destination MAC | Source MAC | DSA header | EType |
465 * +-----------------------+-----------------------+---------------+-------+
467 * <----- len -----> <----- len ----->
470 * >>>>>>> | | | | | | | | | | | | | | |
471 * >>>>>>> +-----------------------+-----------------------+-------+
472 * >>>>>>> | Destination MAC | Source MAC | EType |
473 * +-----------------------+-----------------------+-------+
478 static inline void dsa_strip_etype_header(struct sk_buff
*skb
, int len
)
480 memmove(skb
->data
- ETH_HLEN
, skb
->data
- ETH_HLEN
- len
, 2 * ETH_ALEN
);
483 /* Helper for creating space for DSA header tags in TX path packets.
484 * Must not be called before skb_push(len).
488 * <<<<<<< | | | | | | | | | | | | | | |
489 * ^ <<<<<<< +-----------------------+-----------------------+-------+
490 * | <<<<<<< | Destination MAC | Source MAC | EType |
491 * | +-----------------------+-----------------------+-------+
499 * | | | | | | | | | | | | | | | | | | |
500 * +-----------------------+-----------------------+---------------+-------+
501 * | Destination MAC | Source MAC | DSA header | EType |
502 * +-----------------------+-----------------------+---------------+-------+
504 * | <----- len ----->
507 static inline void dsa_alloc_etype_header(struct sk_buff
*skb
, int len
)
509 memmove(skb
->data
, skb
->data
+ len
, 2 * ETH_ALEN
);
512 /* On RX, eth_type_trans() on the DSA master pulls ETH_HLEN bytes starting from
513 * skb_mac_header(skb), which leaves skb->data pointing at the first byte after
514 * what the DSA master perceives as the EtherType (the beginning of the L3
515 * protocol). Since DSA EtherType header taggers treat the EtherType as part of
516 * the DSA tag itself, and the EtherType is 2 bytes in length, the DSA header
517 * is located 2 bytes behind skb->data. Note that EtherType in this context
518 * means the first 2 bytes of the DSA header, not the encapsulated EtherType
519 * that will become visible after the DSA header is stripped.
521 static inline void *dsa_etype_header_pos_rx(struct sk_buff
*skb
)
523 return skb
->data
- 2;
526 /* On TX, skb->data points to skb_mac_header(skb), which means that EtherType
527 * header taggers start exactly where the EtherType is (the EtherType is
528 * treated as part of the DSA header).
530 static inline void *dsa_etype_header_pos_tx(struct sk_buff
*skb
)
532 return skb
->data
+ 2 * ETH_ALEN
;
536 int dsa_switch_register_notifier(struct dsa_switch
*ds
);
537 void dsa_switch_unregister_notifier(struct dsa_switch
*ds
);
540 void dsa_lag_map(struct dsa_switch_tree
*dst
, struct net_device
*lag
);
541 void dsa_lag_unmap(struct dsa_switch_tree
*dst
, struct net_device
*lag
);
542 int dsa_tree_notify(struct dsa_switch_tree
*dst
, unsigned long e
, void *v
);
543 int dsa_broadcast(unsigned long e
, void *v
);
544 int dsa_tree_change_tag_proto(struct dsa_switch_tree
*dst
,
545 struct net_device
*master
,
546 const struct dsa_device_ops
*tag_ops
,
547 const struct dsa_device_ops
*old_tag_ops
);
548 int dsa_bridge_num_get(const struct net_device
*bridge_dev
, int max
);
549 void dsa_bridge_num_put(const struct net_device
*bridge_dev
, int bridge_num
);
552 int dsa_tag_8021q_bridge_join(struct dsa_switch
*ds
,
553 struct dsa_notifier_bridge_info
*info
);
554 int dsa_tag_8021q_bridge_leave(struct dsa_switch
*ds
,
555 struct dsa_notifier_bridge_info
*info
);
556 int dsa_switch_tag_8021q_vlan_add(struct dsa_switch
*ds
,
557 struct dsa_notifier_tag_8021q_vlan_info
*info
);
558 int dsa_switch_tag_8021q_vlan_del(struct dsa_switch
*ds
,
559 struct dsa_notifier_tag_8021q_vlan_info
*info
);
561 extern struct list_head dsa_tree_list
;