1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips
4 * Copyright (c) 2008-2009 Marvell Semiconductor
5 */
6
7#ifndef __LINUX_NET_DSA_H
8#define __LINUX_NET_DSA_H
9
10#include <linux/if.h>
11#include <linux/if_ether.h>
12#include <linux/list.h>
13#include <linux/notifier.h>
14#include <linux/timer.h>
15#include <linux/workqueue.h>
16#include <linux/of.h>
17#include <linux/ethtool.h>
18#include <linux/net_tstamp.h>
19#include <linux/phy.h>
20#include <linux/platform_data/dsa.h>
21#include <linux/phylink.h>
22#include <net/devlink.h>
23#include <net/switchdev.h>
24
25struct dsa_8021q_context;
26struct tc_action;
27
28#define DSA_TAG_PROTO_NONE_VALUE 0
29#define DSA_TAG_PROTO_BRCM_VALUE 1
30#define DSA_TAG_PROTO_BRCM_PREPEND_VALUE 2
31#define DSA_TAG_PROTO_DSA_VALUE 3
32#define DSA_TAG_PROTO_EDSA_VALUE 4
33#define DSA_TAG_PROTO_GSWIP_VALUE 5
34#define DSA_TAG_PROTO_KSZ9477_VALUE 6
35#define DSA_TAG_PROTO_KSZ9893_VALUE 7
36#define DSA_TAG_PROTO_LAN9303_VALUE 8
37#define DSA_TAG_PROTO_MTK_VALUE 9
38#define DSA_TAG_PROTO_QCA_VALUE 10
39#define DSA_TAG_PROTO_TRAILER_VALUE 11
40#define DSA_TAG_PROTO_8021Q_VALUE 12
41#define DSA_TAG_PROTO_SJA1105_VALUE 13
42#define DSA_TAG_PROTO_KSZ8795_VALUE 14
43#define DSA_TAG_PROTO_OCELOT_VALUE 15
44#define DSA_TAG_PROTO_AR9331_VALUE 16
45#define DSA_TAG_PROTO_RTL4_A_VALUE 17
46#define DSA_TAG_PROTO_HELLCREEK_VALUE 18
47#define DSA_TAG_PROTO_XRS700X_VALUE 19
48#define DSA_TAG_PROTO_OCELOT_8021Q_VALUE 20
49#define DSA_TAG_PROTO_SEVILLE_VALUE 21
50#define DSA_TAG_PROTO_BRCM_LEGACY_VALUE 22
51#define DSA_TAG_PROTO_SJA1110_VALUE 23
52#define DSA_TAG_PROTO_RTL8_4_VALUE 24
53#define DSA_TAG_PROTO_RTL8_4T_VALUE 25
54#define DSA_TAG_PROTO_RZN1_A5PSW_VALUE 26
55#define DSA_TAG_PROTO_LAN937X_VALUE 27
56#define DSA_TAG_PROTO_VSC73XX_8021Q_VALUE 28
57#define DSA_TAG_PROTO_BRCM_LEGACY_FCS_VALUE 29
58
59enum dsa_tag_protocol {
60 DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE,
61 DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE,
62 DSA_TAG_PROTO_BRCM_LEGACY = DSA_TAG_PROTO_BRCM_LEGACY_VALUE,
63 DSA_TAG_PROTO_BRCM_LEGACY_FCS = DSA_TAG_PROTO_BRCM_LEGACY_FCS_VALUE,
64 DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE,
65 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE,
66 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE,
67 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE,
68 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE,
69 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE,
70 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE,
71 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE,
72 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE,
73 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE,
74 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE,
75 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE,
76 DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE,
77 DSA_TAG_PROTO_OCELOT = DSA_TAG_PROTO_OCELOT_VALUE,
78 DSA_TAG_PROTO_AR9331 = DSA_TAG_PROTO_AR9331_VALUE,
79 DSA_TAG_PROTO_RTL4_A = DSA_TAG_PROTO_RTL4_A_VALUE,
80 DSA_TAG_PROTO_HELLCREEK = DSA_TAG_PROTO_HELLCREEK_VALUE,
81 DSA_TAG_PROTO_XRS700X = DSA_TAG_PROTO_XRS700X_VALUE,
82 DSA_TAG_PROTO_OCELOT_8021Q = DSA_TAG_PROTO_OCELOT_8021Q_VALUE,
83 DSA_TAG_PROTO_SEVILLE = DSA_TAG_PROTO_SEVILLE_VALUE,
84 DSA_TAG_PROTO_SJA1110 = DSA_TAG_PROTO_SJA1110_VALUE,
85 DSA_TAG_PROTO_RTL8_4 = DSA_TAG_PROTO_RTL8_4_VALUE,
86 DSA_TAG_PROTO_RTL8_4T = DSA_TAG_PROTO_RTL8_4T_VALUE,
87 DSA_TAG_PROTO_RZN1_A5PSW = DSA_TAG_PROTO_RZN1_A5PSW_VALUE,
88 DSA_TAG_PROTO_LAN937X = DSA_TAG_PROTO_LAN937X_VALUE,
89 DSA_TAG_PROTO_VSC73XX_8021Q = DSA_TAG_PROTO_VSC73XX_8021Q_VALUE,
90};
91
92struct dsa_switch;
93
94struct dsa_device_ops {
95 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev);
96 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev);
97 void (*flow_dissect)(const struct sk_buff *skb, __be16 *proto,
98 int *offset);
99 int (*connect)(struct dsa_switch *ds);
100 void (*disconnect)(struct dsa_switch *ds);
101 unsigned int needed_headroom;
102 unsigned int needed_tailroom;
103 const char *name;
104 enum dsa_tag_protocol proto;
105 /* Some tagging protocols either mangle or shift the destination MAC
106 * address, in which case the DSA conduit would drop packets on ingress
107 * if what it understands out of the destination MAC address is not in
108 * its RX filter.
109 */
110 bool promisc_on_conduit;
111};
112
113struct dsa_lag {
114 struct net_device *dev;
115 unsigned int id;
116 struct mutex fdb_lock;
117 struct list_head fdbs;
118 refcount_t refcount;
119};
120
121struct dsa_switch_tree {
122 struct list_head list;
123
124 /* List of switch ports */
125 struct list_head ports;
126
127 /* Notifier chain for switch-wide events */
128 struct raw_notifier_head nh;
129
130 /* Tree identifier */
131 unsigned int index;
132
133 /* Number of switches attached to this tree */
134 struct kref refcount;
135
136 /* Maps offloaded LAG netdevs to a zero-based linear ID for
137 * drivers that need it.
138 */
139 struct dsa_lag **lags;
140
141 /* Tagging protocol operations */
142 const struct dsa_device_ops *tag_ops;
143
144 /* Default tagging protocol preferred by the switches in this
145 * tree.
146 */
147 enum dsa_tag_protocol default_proto;
148
149 /* Has this tree been applied to the hardware? */
150 bool setup;
151
152 /*
153 * Configuration data for the platform device that owns
154 * this dsa switch tree instance.
155 */
156 struct dsa_platform_data *pd;
157
158 /* List of DSA links composing the routing table */
159 struct list_head rtable;
160
161 /* Length of "lags" array */
162 unsigned int lags_len;
163
164 /* Track the largest switch index within a tree */
165 unsigned int last_switch;
166};
167
168/* LAG IDs are one-based, the dst->lags array is zero-based */
169#define dsa_lags_foreach_id(_id, _dst) \
170 for ((_id) = 1; (_id) <= (_dst)->lags_len; (_id)++) \
171 if ((_dst)->lags[(_id) - 1])
172
173#define dsa_lag_foreach_port(_dp, _dst, _lag) \
174 list_for_each_entry((_dp), &(_dst)->ports, list) \
175 if (dsa_port_offloads_lag((_dp), (_lag)))
176
177#define dsa_hsr_foreach_port(_dp, _ds, _hsr) \
178 list_for_each_entry((_dp), &(_ds)->dst->ports, list) \
179 if ((_dp)->ds == (_ds) && (_dp)->hsr_dev == (_hsr))
180
181static inline struct dsa_lag *dsa_lag_by_id(struct dsa_switch_tree *dst,
182 unsigned int id)
183{
184 /* DSA LAG IDs are one-based, dst->lags is zero-based */
185 return dst->lags[id - 1];
186}
187
188static inline int dsa_lag_id(struct dsa_switch_tree *dst,
189 struct net_device *lag_dev)
190{
191 unsigned int id;
192
193 dsa_lags_foreach_id(id, dst) {
194 struct dsa_lag *lag = dsa_lag_by_id(dst, id);
195
196 if (lag->dev == lag_dev)
197 return lag->id;
198 }
199
200 return -ENODEV;
201}
202
203/* TC matchall action types */
204enum dsa_port_mall_action_type {
205 DSA_PORT_MALL_MIRROR,
206 DSA_PORT_MALL_POLICER,
207};
208
209/* TC mirroring entry */
210struct dsa_mall_mirror_tc_entry {
211 u8 to_local_port;
212 bool ingress;
213};
214
215/* TC port policer entry */
216struct dsa_mall_policer_tc_entry {
217 u32 burst;
218 u64 rate_bytes_per_sec;
219};
220
221/* TC matchall entry */
222struct dsa_mall_tc_entry {
223 struct list_head list;
224 unsigned long cookie;
225 enum dsa_port_mall_action_type type;
226 union {
227 struct dsa_mall_mirror_tc_entry mirror;
228 struct dsa_mall_policer_tc_entry policer;
229 };
230};
231
232struct dsa_bridge {
233 struct net_device *dev;
234 unsigned int num;
235 bool tx_fwd_offload;
236 refcount_t refcount;
237};
238
239struct dsa_port {
240 /* A CPU port is physically connected to a conduit device. A user port
241 * exposes a network device to user-space, called 'user' here.
242 */
243 union {
244 struct net_device *conduit;
245 struct net_device *user;
246 };
247
248 /* Copy of the tagging protocol operations, for quicker access
249 * in the data path. Valid only for the CPU ports.
250 */
251 const struct dsa_device_ops *tag_ops;
252
253 /* Copies for faster access in conduit receive hot path */
254 struct dsa_switch_tree *dst;
255 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev);
256
257 struct dsa_switch *ds;
258
259 unsigned int index;
260
261 enum {
262 DSA_PORT_TYPE_UNUSED = 0,
263 DSA_PORT_TYPE_CPU,
264 DSA_PORT_TYPE_DSA,
265 DSA_PORT_TYPE_USER,
266 } type;
267
268 const char *name;
269 struct dsa_port *cpu_dp;
270 u8 mac[ETH_ALEN];
271
272 u8 stp_state;
273
274 /* Warning: the following bit fields are not atomic, and updating them
275 * can only be done from code paths where concurrency is not possible
276 * (probe time or under rtnl_lock).
277 */
278 u8 vlan_filtering:1;
279
280 /* Managed by DSA on user ports and by drivers on CPU and DSA ports */
281 u8 learning:1;
282
283 u8 lag_tx_enabled:1;
284
285 /* conduit state bits, valid only on CPU ports */
286 u8 conduit_admin_up:1;
287 u8 conduit_oper_up:1;
288
289 /* Valid only on user ports */
290 u8 cpu_port_in_lag:1;
291
292 u8 setup:1;
293
294 struct device_node *dn;
295 unsigned int ageing_time;
296
297 struct dsa_bridge *bridge;
298 struct devlink_port devlink_port;
299 struct phylink *pl;
300 struct phylink_config pl_config;
301 struct dsa_lag *lag;
302 struct net_device *hsr_dev;
303
304 struct list_head list;
305
306 /*
307 * Original copy of the conduit netdev ethtool_ops
308 */
309 const struct ethtool_ops *orig_ethtool_ops;
310
311 /* List of MAC addresses that must be forwarded on this port.
312 * These are only valid on CPU ports and DSA links.
313 */
314 struct mutex addr_lists_lock;
315 struct list_head fdbs;
316 struct list_head mdbs;
317
318 struct mutex vlans_lock;
319 union {
320 /* List of VLANs that CPU and DSA ports are members of.
321 * Access to this is serialized by the sleepable @vlans_lock.
322 */
323 struct list_head vlans;
324 /* List of VLANs that user ports are members of.
325 * Access to this is serialized by netif_addr_lock_bh().
326 */
327 struct list_head user_vlans;
328 };
329};
330
331static inline struct dsa_port *
332dsa_phylink_to_port(struct phylink_config *config)
333{
334 return container_of(config, struct dsa_port, pl_config);
335}
336
337/* TODO: ideally DSA ports would have a single dp->link_dp member,
338 * and no dst->rtable nor this struct dsa_link would be needed,
339 * but this would require some more complex tree walking,
340 * so keep it stupid at the moment and list them all.
341 */
342struct dsa_link {
343 struct dsa_port *dp;
344 struct dsa_port *link_dp;
345 struct list_head list;
346};
347
348enum dsa_db_type {
349 DSA_DB_PORT,
350 DSA_DB_LAG,
351 DSA_DB_BRIDGE,
352};
353
354struct dsa_db {
355 enum dsa_db_type type;
356
357 union {
358 const struct dsa_port *dp;
359 struct dsa_lag lag;
360 struct dsa_bridge bridge;
361 };
362};
363
364struct dsa_mac_addr {
365 unsigned char addr[ETH_ALEN];
366 u16 vid;
367 refcount_t refcount;
368 struct list_head list;
369 struct dsa_db db;
370};
371
372struct dsa_vlan {
373 u16 vid;
374 refcount_t refcount;
375 struct list_head list;
376};
377
378struct dsa_switch {
379 struct device *dev;
380
381 /*
382 * Parent switch tree, and switch index.
383 */
384 struct dsa_switch_tree *dst;
385 unsigned int index;
386
387 /* Warning: the following bit fields are not atomic, and updating them
388 * can only be done from code paths where concurrency is not possible
389 * (probe time or under rtnl_lock).
390 */
391 u32 setup:1;
392
393 /* Disallow bridge core from requesting different VLAN awareness
394 * settings on ports if not hardware-supported
395 */
396 u32 vlan_filtering_is_global:1;
397
398 /* Keep VLAN filtering enabled on ports not offloading any upper */
399 u32 needs_standalone_vlan_filtering:1;
400
401 /* Pass .port_vlan_add and .port_vlan_del to drivers even for bridges
402 * that have vlan_filtering=0. All drivers should ideally set this (and
403 * then the option would get removed), but it is unknown whether this
404 * would break things or not.
405 */
406 u32 configure_vlan_while_not_filtering:1;
407
408 /* Pop the default_pvid of VLAN-unaware bridge ports from tagged frames.
409 * DEPRECATED: Do NOT set this field in new drivers. Instead look at
410 * the dsa_software_vlan_untag() comments.
411 */
412 u32 untag_bridge_pvid:1;
413 /* Pop the default_pvid of VLAN-aware bridge ports from tagged frames.
414 * Useful if the switch cannot preserve the VLAN tag as seen on the
415 * wire for user port ingress, and chooses to send all frames as
416 * VLAN-tagged to the CPU, including those which were originally
417 * untagged.
418 */
419 u32 untag_vlan_aware_bridge_pvid:1;
420
421 /* Let DSA manage the FDB entries towards the
422 * CPU, based on the software bridge database.
423 */
424 u32 assisted_learning_on_cpu_port:1;
425
426 /* In case vlan_filtering_is_global is set, the VLAN awareness state
427 * should be retrieved from here and not from the per-port settings.
428 */
429 u32 vlan_filtering:1;
430
431 /* For switches that only have the MRU configurable. To ensure the
432 * configured MTU is not exceeded, normalization of MRU on all bridged
433 * interfaces is needed.
434 */
435 u32 mtu_enforcement_ingress:1;
436
437 /* Drivers that isolate the FDBs of multiple bridges must set this
438 * to true to receive the bridge as an argument in .port_fdb_{add,del}
439 * and .port_mdb_{add,del}. Otherwise, the bridge.num will always be
440 * passed as zero.
441 */
442 u32 fdb_isolation:1;
443
444 /* Drivers that have global DSCP mapping settings must set this to
445 * true to automatically apply the settings to all ports.
446 */
447 u32 dscp_prio_mapping_is_global:1;
448
449 /* Listener for switch fabric events */
450 struct notifier_block nb;
451
452 /*
453 * Give the switch driver somewhere to hang its private data
454 * structure.
455 */
456 void *priv;
457
458 void *tagger_data;
459
460 /*
461 * Configuration data for this switch.
462 */
463 struct dsa_chip_data *cd;
464
465 /*
466 * The switch operations.
467 */
468 const struct dsa_switch_ops *ops;
469
470 /*
471 * Allow a DSA switch driver to override the phylink MAC ops
472 */
473 const struct phylink_mac_ops *phylink_mac_ops;
474
475 /*
476 * User mii_bus and devices for the individual ports.
477 */
478 u32 phys_mii_mask;
479 struct mii_bus *user_mii_bus;
480
481 /* Ageing Time limits in msecs */
482 unsigned int ageing_time_min;
483 unsigned int ageing_time_max;
484
485 /* Storage for drivers using tag_8021q */
486 struct dsa_8021q_context *tag_8021q_ctx;
487
488 /* devlink used to represent this switch device */
489 struct devlink *devlink;
490
491 /* Number of switch port queues */
492 unsigned int num_tx_queues;
493
494 /* Drivers that benefit from having an ID associated with each
495 * offloaded LAG should set this to the maximum number of
496 * supported IDs. DSA will then maintain a mapping of _at
497 * least_ these many IDs, accessible to drivers via
498 * dsa_lag_id().
499 */
500 unsigned int num_lag_ids;
501
502 /* Drivers that support bridge forwarding offload or FDB isolation
503 * should set this to the maximum number of bridges spanning the same
504 * switch tree (or all trees, in the case of cross-tree bridging
505 * support) that can be offloaded.
506 */
507 unsigned int max_num_bridges;
508
509 unsigned int num_ports;
510};
511
512static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
513{
514 struct dsa_switch_tree *dst = ds->dst;
515 struct dsa_port *dp;
516
517 list_for_each_entry(dp, &dst->ports, list)
518 if (dp->ds == ds && dp->index == p)
519 return dp;
520
521 return NULL;
522}
523
524static inline bool dsa_port_is_dsa(struct dsa_port *port)
525{
526 return port->type == DSA_PORT_TYPE_DSA;
527}
528
529static inline bool dsa_port_is_cpu(struct dsa_port *port)
530{
531 return port->type == DSA_PORT_TYPE_CPU;
532}
533
534static inline bool dsa_port_is_user(struct dsa_port *dp)
535{
536 return dp->type == DSA_PORT_TYPE_USER;
537}
538
539static inline bool dsa_port_is_unused(struct dsa_port *dp)
540{
541 return dp->type == DSA_PORT_TYPE_UNUSED;
542}
543
544static inline bool dsa_port_conduit_is_operational(struct dsa_port *dp)
545{
546 return dsa_port_is_cpu(port: dp) && dp->conduit_admin_up &&
547 dp->conduit_oper_up;
548}
549
550static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p)
551{
552 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED;
553}
554
555static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
556{
557 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU;
558}
559
560static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
561{
562 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA;
563}
564
565static inline bool dsa_is_user_port(struct dsa_switch *ds, int p)
566{
567 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER;
568}
569
570#define dsa_tree_for_each_user_port(_dp, _dst) \
571 list_for_each_entry((_dp), &(_dst)->ports, list) \
572 if (dsa_port_is_user((_dp)))
573
574#define dsa_tree_for_each_user_port_continue_reverse(_dp, _dst) \
575 list_for_each_entry_continue_reverse((_dp), &(_dst)->ports, list) \
576 if (dsa_port_is_user((_dp)))
577
578#define dsa_tree_for_each_cpu_port(_dp, _dst) \
579 list_for_each_entry((_dp), &(_dst)->ports, list) \
580 if (dsa_port_is_cpu((_dp)))
581
582#define dsa_switch_for_each_port(_dp, _ds) \
583 list_for_each_entry((_dp), &(_ds)->dst->ports, list) \
584 if ((_dp)->ds == (_ds))
585
586#define dsa_switch_for_each_port_safe(_dp, _next, _ds) \
587 list_for_each_entry_safe((_dp), (_next), &(_ds)->dst->ports, list) \
588 if ((_dp)->ds == (_ds))
589
590#define dsa_switch_for_each_port_continue_reverse(_dp, _ds) \
591 list_for_each_entry_continue_reverse((_dp), &(_ds)->dst->ports, list) \
592 if ((_dp)->ds == (_ds))
593
594#define dsa_switch_for_each_available_port(_dp, _ds) \
595 dsa_switch_for_each_port((_dp), (_ds)) \
596 if (!dsa_port_is_unused((_dp)))
597
598#define dsa_switch_for_each_user_port(_dp, _ds) \
599 dsa_switch_for_each_port((_dp), (_ds)) \
600 if (dsa_port_is_user((_dp)))
601
602#define dsa_switch_for_each_user_port_continue_reverse(_dp, _ds) \
603 dsa_switch_for_each_port_continue_reverse((_dp), (_ds)) \
604 if (dsa_port_is_user((_dp)))
605
606#define dsa_switch_for_each_cpu_port(_dp, _ds) \
607 dsa_switch_for_each_port((_dp), (_ds)) \
608 if (dsa_port_is_cpu((_dp)))
609
610#define dsa_switch_for_each_cpu_port_continue_reverse(_dp, _ds) \
611 dsa_switch_for_each_port_continue_reverse((_dp), (_ds)) \
612 if (dsa_port_is_cpu((_dp)))
613
614static inline u32 dsa_user_ports(struct dsa_switch *ds)
615{
616 struct dsa_port *dp;
617 u32 mask = 0;
618
619 dsa_switch_for_each_user_port(dp, ds)
620 mask |= BIT(dp->index);
621
622 return mask;
623}
624
625static inline u32 dsa_cpu_ports(struct dsa_switch *ds)
626{
627 struct dsa_port *cpu_dp;
628 u32 mask = 0;
629
630 dsa_switch_for_each_cpu_port(cpu_dp, ds)
631 mask |= BIT(cpu_dp->index);
632
633 return mask;
634}
635
636/* Return the local port used to reach an arbitrary switch device */
637static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device)
638{
639 struct dsa_switch_tree *dst = ds->dst;
640 struct dsa_link *dl;
641
642 list_for_each_entry(dl, &dst->rtable, list)
643 if (dl->dp->ds == ds && dl->link_dp->ds->index == device)
644 return dl->dp->index;
645
646 return ds->num_ports;
647}
648
649/* Return the local port used to reach an arbitrary switch port */
650static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device,
651 int port)
652{
653 if (device == ds->index)
654 return port;
655 else
656 return dsa_routing_port(ds, device);
657}
658
659/* Return the local port used to reach the dedicated CPU port */
660static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port)
661{
662 const struct dsa_port *dp = dsa_to_port(ds, p: port);
663 const struct dsa_port *cpu_dp = dp->cpu_dp;
664
665 if (!cpu_dp)
666 return port;
667
668 return dsa_towards_port(ds, device: cpu_dp->ds->index, port: cpu_dp->index);
669}
670
671/* Return true if this is the local port used to reach the CPU port */
672static inline bool dsa_is_upstream_port(struct dsa_switch *ds, int port)
673{
674 if (dsa_is_unused_port(ds, p: port))
675 return false;
676
677 return port == dsa_upstream_port(ds, port);
678}
679
680/* Return true if this is a DSA port leading away from the CPU */
681static inline bool dsa_is_downstream_port(struct dsa_switch *ds, int port)
682{
683 return dsa_is_dsa_port(ds, p: port) && !dsa_is_upstream_port(ds, port);
684}
685
686/* Return the local port used to reach the CPU port */
687static inline unsigned int dsa_switch_upstream_port(struct dsa_switch *ds)
688{
689 struct dsa_port *dp;
690
691 dsa_switch_for_each_available_port(dp, ds) {
692 return dsa_upstream_port(ds, port: dp->index);
693 }
694
695 return ds->num_ports;
696}
697
698/* Return true if @upstream_ds is an upstream switch of @downstream_ds, meaning
699 * that the routing port from @downstream_ds to @upstream_ds is also the port
700 * which @downstream_ds uses to reach its dedicated CPU.
701 */
702static inline bool dsa_switch_is_upstream_of(struct dsa_switch *upstream_ds,
703 struct dsa_switch *downstream_ds)
704{
705 int routing_port;
706
707 if (upstream_ds == downstream_ds)
708 return true;
709
710 routing_port = dsa_routing_port(ds: downstream_ds, device: upstream_ds->index);
711
712 return dsa_is_upstream_port(ds: downstream_ds, port: routing_port);
713}
714
715static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp)
716{
717 const struct dsa_switch *ds = dp->ds;
718
719 if (ds->vlan_filtering_is_global)
720 return ds->vlan_filtering;
721 else
722 return dp->vlan_filtering;
723}
724
725static inline unsigned int dsa_port_lag_id_get(struct dsa_port *dp)
726{
727 return dp->lag ? dp->lag->id : 0;
728}
729
730static inline struct net_device *dsa_port_lag_dev_get(struct dsa_port *dp)
731{
732 return dp->lag ? dp->lag->dev : NULL;
733}
734
735static inline bool dsa_port_offloads_lag(struct dsa_port *dp,
736 const struct dsa_lag *lag)
737{
738 return dsa_port_lag_dev_get(dp) == lag->dev;
739}
740
741static inline struct net_device *dsa_port_to_conduit(const struct dsa_port *dp)
742{
743 if (dp->cpu_port_in_lag)
744 return dsa_port_lag_dev_get(dp: dp->cpu_dp);
745
746 return dp->cpu_dp->conduit;
747}
748
749static inline
750struct net_device *dsa_port_to_bridge_port(const struct dsa_port *dp)
751{
752 if (!dp->bridge)
753 return NULL;
754
755 if (dp->lag)
756 return dp->lag->dev;
757 else if (dp->hsr_dev)
758 return dp->hsr_dev;
759
760 return dp->user;
761}
762
763static inline struct net_device *
764dsa_port_bridge_dev_get(const struct dsa_port *dp)
765{
766 return dp->bridge ? dp->bridge->dev : NULL;
767}
768
769static inline unsigned int dsa_port_bridge_num_get(struct dsa_port *dp)
770{
771 return dp->bridge ? dp->bridge->num : 0;
772}
773
774static inline bool dsa_port_bridge_same(const struct dsa_port *a,
775 const struct dsa_port *b)
776{
777 struct net_device *br_a = dsa_port_bridge_dev_get(dp: a);
778 struct net_device *br_b = dsa_port_bridge_dev_get(dp: b);
779
780 /* Standalone ports are not in the same bridge with one another */
781 return (!br_a || !br_b) ? false : (br_a == br_b);
782}
783
784static inline bool dsa_port_offloads_bridge_port(struct dsa_port *dp,
785 const struct net_device *dev)
786{
787 return dsa_port_to_bridge_port(dp) == dev;
788}
789
790static inline bool
791dsa_port_offloads_bridge_dev(struct dsa_port *dp,
792 const struct net_device *bridge_dev)
793{
794 /* DSA ports connected to a bridge, and event was emitted
795 * for the bridge.
796 */
797 return dsa_port_bridge_dev_get(dp) == bridge_dev;
798}
799
800static inline bool dsa_port_offloads_bridge(struct dsa_port *dp,
801 const struct dsa_bridge *bridge)
802{
803 return dsa_port_bridge_dev_get(dp) == bridge->dev;
804}
805
806/* Returns true if any port of this tree offloads the given net_device */
807static inline bool dsa_tree_offloads_bridge_port(struct dsa_switch_tree *dst,
808 const struct net_device *dev)
809{
810 struct dsa_port *dp;
811
812 list_for_each_entry(dp, &dst->ports, list)
813 if (dsa_port_offloads_bridge_port(dp, dev))
814 return true;
815
816 return false;
817}
818
819/* Returns true if any port of this tree offloads the given bridge */
820static inline bool
821dsa_tree_offloads_bridge_dev(struct dsa_switch_tree *dst,
822 const struct net_device *bridge_dev)
823{
824 struct dsa_port *dp;
825
826 list_for_each_entry(dp, &dst->ports, list)
827 if (dsa_port_offloads_bridge_dev(dp, bridge_dev))
828 return true;
829
830 return false;
831}
832
833static inline bool dsa_port_tree_same(const struct dsa_port *a,
834 const struct dsa_port *b)
835{
836 return a->ds->dst == b->ds->dst;
837}
838
839typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
840 bool is_static, void *data);
841struct dsa_switch_ops {
842 /*
843 * Tagging protocol helpers called for the CPU ports and DSA links.
844 * @get_tag_protocol retrieves the initial tagging protocol and is
845 * mandatory. Switches which can operate using multiple tagging
846 * protocols should implement @change_tag_protocol and report in
847 * @get_tag_protocol the tagger in current use.
848 */
849 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds,
850 int port,
851 enum dsa_tag_protocol mprot);
852 int (*change_tag_protocol)(struct dsa_switch *ds,
853 enum dsa_tag_protocol proto);
854 /*
855 * Method for switch drivers to connect to the tagging protocol driver
856 * in current use. The switch driver can provide handlers for certain
857 * types of packets for switch management.
858 */
859 int (*connect_tag_protocol)(struct dsa_switch *ds,
860 enum dsa_tag_protocol proto);
861
862 int (*port_change_conduit)(struct dsa_switch *ds, int port,
863 struct net_device *conduit,
864 struct netlink_ext_ack *extack);
865
866 /* Optional switch-wide initialization and destruction methods */
867 int (*setup)(struct dsa_switch *ds);
868 void (*teardown)(struct dsa_switch *ds);
869
870 /* Per-port initialization and destruction methods. Mandatory if the
871 * driver registers devlink port regions, optional otherwise.
872 */
873 int (*port_setup)(struct dsa_switch *ds, int port);
874 void (*port_teardown)(struct dsa_switch *ds, int port);
875
876 u32 (*get_phy_flags)(struct dsa_switch *ds, int port);
877
878 /*
879 * Access to the switch's PHY registers.
880 */
881 int (*phy_read)(struct dsa_switch *ds, int port, int regnum);
882 int (*phy_write)(struct dsa_switch *ds, int port,
883 int regnum, u16 val);
884
885 /*
886 * PHYLINK integration
887 */
888 void (*phylink_get_caps)(struct dsa_switch *ds, int port,
889 struct phylink_config *config);
890 void (*phylink_fixed_state)(struct dsa_switch *ds, int port,
891 struct phylink_link_state *state);
892 /*
893 * Port statistics counters.
894 */
895 void (*get_strings)(struct dsa_switch *ds, int port,
896 u32 stringset, uint8_t *data);
897 void (*get_ethtool_stats)(struct dsa_switch *ds,
898 int port, uint64_t *data);
899 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset);
900 void (*get_ethtool_phy_stats)(struct dsa_switch *ds,
901 int port, uint64_t *data);
902 void (*get_eth_phy_stats)(struct dsa_switch *ds, int port,
903 struct ethtool_eth_phy_stats *phy_stats);
904 void (*get_eth_mac_stats)(struct dsa_switch *ds, int port,
905 struct ethtool_eth_mac_stats *mac_stats);
906 void (*get_eth_ctrl_stats)(struct dsa_switch *ds, int port,
907 struct ethtool_eth_ctrl_stats *ctrl_stats);
908 void (*get_rmon_stats)(struct dsa_switch *ds, int port,
909 struct ethtool_rmon_stats *rmon_stats,
910 const struct ethtool_rmon_hist_range **ranges);
911 void (*get_ts_stats)(struct dsa_switch *ds, int port,
912 struct ethtool_ts_stats *ts_stats);
913 void (*get_stats64)(struct dsa_switch *ds, int port,
914 struct rtnl_link_stats64 *s);
915 void (*get_pause_stats)(struct dsa_switch *ds, int port,
916 struct ethtool_pause_stats *pause_stats);
917 void (*self_test)(struct dsa_switch *ds, int port,
918 struct ethtool_test *etest, u64 *data);
919
920 /*
921 * ethtool Wake-on-LAN
922 */
923 void (*get_wol)(struct dsa_switch *ds, int port,
924 struct ethtool_wolinfo *w);
925 int (*set_wol)(struct dsa_switch *ds, int port,
926 struct ethtool_wolinfo *w);
927
928 /*
929 * ethtool timestamp info
930 */
931 int (*get_ts_info)(struct dsa_switch *ds, int port,
932 struct kernel_ethtool_ts_info *ts);
933
934 /*
935 * ethtool MAC merge layer
936 */
937 int (*get_mm)(struct dsa_switch *ds, int port,
938 struct ethtool_mm_state *state);
939 int (*set_mm)(struct dsa_switch *ds, int port,
940 struct ethtool_mm_cfg *cfg,
941 struct netlink_ext_ack *extack);
942 void (*get_mm_stats)(struct dsa_switch *ds, int port,
943 struct ethtool_mm_stats *stats);
944
945 /*
946 * DCB ops
947 */
948 int (*port_get_default_prio)(struct dsa_switch *ds, int port);
949 int (*port_set_default_prio)(struct dsa_switch *ds, int port,
950 u8 prio);
951 int (*port_get_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp);
952 int (*port_add_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp,
953 u8 prio);
954 int (*port_del_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp,
955 u8 prio);
956 int (*port_set_apptrust)(struct dsa_switch *ds, int port,
957 const u8 *sel, int nsel);
958 int (*port_get_apptrust)(struct dsa_switch *ds, int port, u8 *sel,
959 int *nsel);
960
961 /*
962 * Suspend and resume
963 */
964 int (*suspend)(struct dsa_switch *ds);
965 int (*resume)(struct dsa_switch *ds);
966
967 /*
968 * Port enable/disable
969 */
970 int (*port_enable)(struct dsa_switch *ds, int port,
971 struct phy_device *phy);
972 void (*port_disable)(struct dsa_switch *ds, int port);
973
974
975 /*
976 * Notification for MAC address changes on user ports. Drivers can
977 * currently only veto operations. They should not use the method to
978 * program the hardware, since the operation is not rolled back in case
979 * of other errors.
980 */
981 int (*port_set_mac_address)(struct dsa_switch *ds, int port,
982 const unsigned char *addr);
983
984 /*
985 * Compatibility between device trees defining multiple CPU ports and
986 * drivers which are not OK to use by default the numerically smallest
987 * CPU port of a switch for its local ports. This can return NULL,
988 * meaning "don't know/don't care".
989 */
990 struct dsa_port *(*preferred_default_local_cpu_port)(struct dsa_switch *ds);
991
992 /*
993 * Port's MAC EEE settings
994 */
995 bool (*support_eee)(struct dsa_switch *ds, int port);
996 int (*set_mac_eee)(struct dsa_switch *ds, int port,
997 struct ethtool_keee *e);
998
999 /* EEPROM access */
1000 int (*get_eeprom_len)(struct dsa_switch *ds);
1001 int (*get_eeprom)(struct dsa_switch *ds,
1002 struct ethtool_eeprom *eeprom, u8 *data);
1003 int (*set_eeprom)(struct dsa_switch *ds,
1004 struct ethtool_eeprom *eeprom, u8 *data);
1005
1006 /*
1007 * Register access.
1008 */
1009 int (*get_regs_len)(struct dsa_switch *ds, int port);
1010 void (*get_regs)(struct dsa_switch *ds, int port,
1011 struct ethtool_regs *regs, void *p);
1012
1013 /*
1014 * Upper device tracking.
1015 */
1016 int (*port_prechangeupper)(struct dsa_switch *ds, int port,
1017 struct netdev_notifier_changeupper_info *info);
1018
1019 /*
1020 * Bridge integration
1021 */
1022 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs);
1023 int (*port_bridge_join)(struct dsa_switch *ds, int port,
1024 struct dsa_bridge bridge,
1025 bool *tx_fwd_offload,
1026 struct netlink_ext_ack *extack);
1027 void (*port_bridge_leave)(struct dsa_switch *ds, int port,
1028 struct dsa_bridge bridge);
1029 void (*port_stp_state_set)(struct dsa_switch *ds, int port,
1030 u8 state);
1031 int (*port_mst_state_set)(struct dsa_switch *ds, int port,
1032 const struct switchdev_mst_state *state);
1033 void (*port_fast_age)(struct dsa_switch *ds, int port);
1034 int (*port_vlan_fast_age)(struct dsa_switch *ds, int port, u16 vid);
1035 int (*port_pre_bridge_flags)(struct dsa_switch *ds, int port,
1036 struct switchdev_brport_flags flags,
1037 struct netlink_ext_ack *extack);
1038 int (*port_bridge_flags)(struct dsa_switch *ds, int port,
1039 struct switchdev_brport_flags flags,
1040 struct netlink_ext_ack *extack);
1041 void (*port_set_host_flood)(struct dsa_switch *ds, int port,
1042 bool uc, bool mc);
1043
1044 /*
1045 * VLAN support
1046 */
1047 int (*port_vlan_filtering)(struct dsa_switch *ds, int port,
1048 bool vlan_filtering,
1049 struct netlink_ext_ack *extack);
1050 int (*port_vlan_add)(struct dsa_switch *ds, int port,
1051 const struct switchdev_obj_port_vlan *vlan,
1052 struct netlink_ext_ack *extack);
1053 int (*port_vlan_del)(struct dsa_switch *ds, int port,
1054 const struct switchdev_obj_port_vlan *vlan);
1055 int (*vlan_msti_set)(struct dsa_switch *ds, struct dsa_bridge bridge,
1056 const struct switchdev_vlan_msti *msti);
1057
1058 /*
1059 * Forwarding database
1060 */
1061 int (*port_fdb_add)(struct dsa_switch *ds, int port,
1062 const unsigned char *addr, u16 vid,
1063 struct dsa_db db);
1064 int (*port_fdb_del)(struct dsa_switch *ds, int port,
1065 const unsigned char *addr, u16 vid,
1066 struct dsa_db db);
1067 int (*port_fdb_dump)(struct dsa_switch *ds, int port,
1068 dsa_fdb_dump_cb_t *cb, void *data);
1069 int (*lag_fdb_add)(struct dsa_switch *ds, struct dsa_lag lag,
1070 const unsigned char *addr, u16 vid,
1071 struct dsa_db db);
1072 int (*lag_fdb_del)(struct dsa_switch *ds, struct dsa_lag lag,
1073 const unsigned char *addr, u16 vid,
1074 struct dsa_db db);
1075
1076 /*
1077 * Multicast database
1078 */
1079 int (*port_mdb_add)(struct dsa_switch *ds, int port,
1080 const struct switchdev_obj_port_mdb *mdb,
1081 struct dsa_db db);
1082 int (*port_mdb_del)(struct dsa_switch *ds, int port,
1083 const struct switchdev_obj_port_mdb *mdb,
1084 struct dsa_db db);
1085 /*
1086 * RXNFC
1087 */
1088 int (*get_rxnfc)(struct dsa_switch *ds, int port,
1089 struct ethtool_rxnfc *nfc, u32 *rule_locs);
1090 int (*set_rxnfc)(struct dsa_switch *ds, int port,
1091 struct ethtool_rxnfc *nfc);
1092
1093 /*
1094 * TC integration
1095 */
1096 int (*cls_flower_add)(struct dsa_switch *ds, int port,
1097 struct flow_cls_offload *cls, bool ingress);
1098 int (*cls_flower_del)(struct dsa_switch *ds, int port,
1099 struct flow_cls_offload *cls, bool ingress);
1100 int (*cls_flower_stats)(struct dsa_switch *ds, int port,
1101 struct flow_cls_offload *cls, bool ingress);
1102 int (*port_mirror_add)(struct dsa_switch *ds, int port,
1103 struct dsa_mall_mirror_tc_entry *mirror,
1104 bool ingress, struct netlink_ext_ack *extack);
1105 void (*port_mirror_del)(struct dsa_switch *ds, int port,
1106 struct dsa_mall_mirror_tc_entry *mirror);
1107 int (*port_policer_add)(struct dsa_switch *ds, int port,
1108 struct dsa_mall_policer_tc_entry *policer);
1109 void (*port_policer_del)(struct dsa_switch *ds, int port);
1110 int (*port_setup_tc)(struct dsa_switch *ds, int port,
1111 enum tc_setup_type type, void *type_data);
1112
1113 /*
1114 * Cross-chip operations
1115 */
1116 int (*crosschip_bridge_join)(struct dsa_switch *ds, int tree_index,
1117 int sw_index, int port,
1118 struct dsa_bridge bridge,
1119 struct netlink_ext_ack *extack);
1120 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index,
1121 int sw_index, int port,
1122 struct dsa_bridge bridge);
1123 int (*crosschip_lag_change)(struct dsa_switch *ds, int sw_index,
1124 int port);
1125 int (*crosschip_lag_join)(struct dsa_switch *ds, int sw_index,
1126 int port, struct dsa_lag lag,
1127 struct netdev_lag_upper_info *info,
1128 struct netlink_ext_ack *extack);
1129 int (*crosschip_lag_leave)(struct dsa_switch *ds, int sw_index,
1130 int port, struct dsa_lag lag);
1131
1132 /*
1133 * PTP functionality
1134 */
1135 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port,
1136 struct kernel_hwtstamp_config *config);
1137 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port,
1138 struct kernel_hwtstamp_config *config,
1139 struct netlink_ext_ack *extack);
1140 void (*port_txtstamp)(struct dsa_switch *ds, int port,
1141 struct sk_buff *skb);
1142 bool (*port_rxtstamp)(struct dsa_switch *ds, int port,
1143 struct sk_buff *skb, unsigned int type);
1144
1145 /* Devlink parameters, etc */
1146 int (*devlink_param_get)(struct dsa_switch *ds, u32 id,
1147 struct devlink_param_gset_ctx *ctx);
1148 int (*devlink_param_set)(struct dsa_switch *ds, u32 id,
1149 struct devlink_param_gset_ctx *ctx);
1150 int (*devlink_info_get)(struct dsa_switch *ds,
1151 struct devlink_info_req *req,
1152 struct netlink_ext_ack *extack);
1153 int (*devlink_sb_pool_get)(struct dsa_switch *ds,
1154 unsigned int sb_index, u16 pool_index,
1155 struct devlink_sb_pool_info *pool_info);
1156 int (*devlink_sb_pool_set)(struct dsa_switch *ds, unsigned int sb_index,
1157 u16 pool_index, u32 size,
1158 enum devlink_sb_threshold_type threshold_type,
1159 struct netlink_ext_ack *extack);
1160 int (*devlink_sb_port_pool_get)(struct dsa_switch *ds, int port,
1161 unsigned int sb_index, u16 pool_index,
1162 u32 *p_threshold);
1163 int (*devlink_sb_port_pool_set)(struct dsa_switch *ds, int port,
1164 unsigned int sb_index, u16 pool_index,
1165 u32 threshold,
1166 struct netlink_ext_ack *extack);
1167 int (*devlink_sb_tc_pool_bind_get)(struct dsa_switch *ds, int port,
1168 unsigned int sb_index, u16 tc_index,
1169 enum devlink_sb_pool_type pool_type,
1170 u16 *p_pool_index, u32 *p_threshold);
1171 int (*devlink_sb_tc_pool_bind_set)(struct dsa_switch *ds, int port,
1172 unsigned int sb_index, u16 tc_index,
1173 enum devlink_sb_pool_type pool_type,
1174 u16 pool_index, u32 threshold,
1175 struct netlink_ext_ack *extack);
1176 int (*devlink_sb_occ_snapshot)(struct dsa_switch *ds,
1177 unsigned int sb_index);
1178 int (*devlink_sb_occ_max_clear)(struct dsa_switch *ds,
1179 unsigned int sb_index);
1180 int (*devlink_sb_occ_port_pool_get)(struct dsa_switch *ds, int port,
1181 unsigned int sb_index, u16 pool_index,
1182 u32 *p_cur, u32 *p_max);
1183 int (*devlink_sb_occ_tc_port_bind_get)(struct dsa_switch *ds, int port,
1184 unsigned int sb_index, u16 tc_index,
1185 enum devlink_sb_pool_type pool_type,
1186 u32 *p_cur, u32 *p_max);
1187
1188 /*
1189 * MTU change functionality. Switches can also adjust their MRU through
1190 * this method. By MTU, one understands the SDU (L2 payload) length.
1191 * If the switch needs to account for the DSA tag on the CPU port, this
1192 * method needs to do so privately.
1193 */
1194 int (*port_change_mtu)(struct dsa_switch *ds, int port,
1195 int new_mtu);
1196 int (*port_max_mtu)(struct dsa_switch *ds, int port);
1197
1198 /*
1199 * LAG integration
1200 */
1201 int (*port_lag_change)(struct dsa_switch *ds, int port);
1202 int (*port_lag_join)(struct dsa_switch *ds, int port,
1203 struct dsa_lag lag,
1204 struct netdev_lag_upper_info *info,
1205 struct netlink_ext_ack *extack);
1206 int (*port_lag_leave)(struct dsa_switch *ds, int port,
1207 struct dsa_lag lag);
1208
1209 /*
1210 * HSR integration
1211 */
1212 int (*port_hsr_join)(struct dsa_switch *ds, int port,
1213 struct net_device *hsr,
1214 struct netlink_ext_ack *extack);
1215 int (*port_hsr_leave)(struct dsa_switch *ds, int port,
1216 struct net_device *hsr);
1217
1218 /*
1219 * MRP integration
1220 */
1221 int (*port_mrp_add)(struct dsa_switch *ds, int port,
1222 const struct switchdev_obj_mrp *mrp);
1223 int (*port_mrp_del)(struct dsa_switch *ds, int port,
1224 const struct switchdev_obj_mrp *mrp);
1225 int (*port_mrp_add_ring_role)(struct dsa_switch *ds, int port,
1226 const struct switchdev_obj_ring_role_mrp *mrp);
1227 int (*port_mrp_del_ring_role)(struct dsa_switch *ds, int port,
1228 const struct switchdev_obj_ring_role_mrp *mrp);
1229
1230 /*
1231 * tag_8021q operations
1232 */
1233 int (*tag_8021q_vlan_add)(struct dsa_switch *ds, int port, u16 vid,
1234 u16 flags);
1235 int (*tag_8021q_vlan_del)(struct dsa_switch *ds, int port, u16 vid);
1236
1237 /*
1238 * DSA conduit tracking operations
1239 */
1240 void (*conduit_state_change)(struct dsa_switch *ds,
1241 const struct net_device *conduit,
1242 bool operational);
1243};
1244
1245#define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \
1246 DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \
1247 dsa_devlink_param_get, dsa_devlink_param_set, NULL)
1248
1249int dsa_devlink_param_get(struct devlink *dl, u32 id,
1250 struct devlink_param_gset_ctx *ctx);
1251int dsa_devlink_param_set(struct devlink *dl, u32 id,
1252 struct devlink_param_gset_ctx *ctx,
1253 struct netlink_ext_ack *extack);
1254int dsa_devlink_params_register(struct dsa_switch *ds,
1255 const struct devlink_param *params,
1256 size_t params_count);
1257void dsa_devlink_params_unregister(struct dsa_switch *ds,
1258 const struct devlink_param *params,
1259 size_t params_count);
1260int dsa_devlink_resource_register(struct dsa_switch *ds,
1261 const char *resource_name,
1262 u64 resource_size,
1263 u64 resource_id,
1264 u64 parent_resource_id,
1265 const struct devlink_resource_size_params *size_params);
1266
1267void dsa_devlink_resources_unregister(struct dsa_switch *ds);
1268
1269void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds,
1270 u64 resource_id,
1271 devlink_resource_occ_get_t *occ_get,
1272 void *occ_get_priv);
1273void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds,
1274 u64 resource_id);
1275struct devlink_region *
1276dsa_devlink_region_create(struct dsa_switch *ds,
1277 const struct devlink_region_ops *ops,
1278 u32 region_max_snapshots, u64 region_size);
1279struct devlink_region *
1280dsa_devlink_port_region_create(struct dsa_switch *ds,
1281 int port,
1282 const struct devlink_port_region_ops *ops,
1283 u32 region_max_snapshots, u64 region_size);
1284void dsa_devlink_region_destroy(struct devlink_region *region);
1285
1286struct dsa_port *dsa_port_from_netdev(struct net_device *netdev);
1287
1288struct dsa_devlink_priv {
1289 struct dsa_switch *ds;
1290};
1291
1292static inline struct dsa_switch *dsa_devlink_to_ds(struct devlink *dl)
1293{
1294 struct dsa_devlink_priv *dl_priv = devlink_priv(devlink: dl);
1295
1296 return dl_priv->ds;
1297}
1298
1299static inline
1300struct dsa_switch *dsa_devlink_port_to_ds(struct devlink_port *port)
1301{
1302 struct devlink *dl = port->devlink;
1303 struct dsa_devlink_priv *dl_priv = devlink_priv(devlink: dl);
1304
1305 return dl_priv->ds;
1306}
1307
1308static inline int dsa_devlink_port_to_port(struct devlink_port *port)
1309{
1310 return port->index;
1311}
1312
1313struct dsa_switch_driver {
1314 struct list_head list;
1315 const struct dsa_switch_ops *ops;
1316};
1317
1318bool dsa_fdb_present_in_other_db(struct dsa_switch *ds, int port,
1319 const unsigned char *addr, u16 vid,
1320 struct dsa_db db);
1321bool dsa_mdb_present_in_other_db(struct dsa_switch *ds, int port,
1322 const struct switchdev_obj_port_mdb *mdb,
1323 struct dsa_db db);
1324
1325/* Keep inline for faster access in hot path */
1326static inline bool netdev_uses_dsa(const struct net_device *dev)
1327{
1328#if IS_ENABLED(CONFIG_NET_DSA)
1329 return dev->dsa_ptr && dev->dsa_ptr->rcv;
1330#endif
1331 return false;
1332}
1333
1334/* All DSA tags that push the EtherType to the right (basically all except tail
1335 * tags, which don't break dissection) can be treated the same from the
1336 * perspective of the flow dissector.
1337 *
1338 * We need to return:
1339 * - offset: the (B - A) difference between:
1340 * A. the position of the real EtherType and
1341 * B. the current skb->data (aka ETH_HLEN bytes into the frame, aka 2 bytes
1342 * after the normal EtherType was supposed to be)
1343 * The offset in bytes is exactly equal to the tagger overhead (and half of
1344 * that, in __be16 shorts).
1345 *
1346 * - proto: the value of the real EtherType.
1347 */
1348static inline void dsa_tag_generic_flow_dissect(const struct sk_buff *skb,
1349 __be16 *proto, int *offset)
1350{
1351#if IS_ENABLED(CONFIG_NET_DSA)
1352 const struct dsa_device_ops *ops = skb->dev->dsa_ptr->tag_ops;
1353 int tag_len = ops->needed_headroom;
1354
1355 *offset = tag_len;
1356 *proto = ((__be16 *)skb->data)[(tag_len / 2) - 1];
1357#endif
1358}
1359
1360void dsa_unregister_switch(struct dsa_switch *ds);
1361int dsa_register_switch(struct dsa_switch *ds);
1362void dsa_switch_shutdown(struct dsa_switch *ds);
1363struct dsa_switch *dsa_switch_find(int tree_index, int sw_index);
1364void dsa_flush_workqueue(void);
1365#ifdef CONFIG_PM_SLEEP
1366int dsa_switch_suspend(struct dsa_switch *ds);
1367int dsa_switch_resume(struct dsa_switch *ds);
1368#else
1369static inline int dsa_switch_suspend(struct dsa_switch *ds)
1370{
1371 return 0;
1372}
1373static inline int dsa_switch_resume(struct dsa_switch *ds)
1374{
1375 return 0;
1376}
1377#endif /* CONFIG_PM_SLEEP */
1378
1379#if IS_ENABLED(CONFIG_NET_DSA)
1380bool dsa_user_dev_check(const struct net_device *dev);
1381#else
1382static inline bool dsa_user_dev_check(const struct net_device *dev)
1383{
1384 return false;
1385}
1386#endif
1387
1388netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev);
1389void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up);
1390bool dsa_supports_eee(struct dsa_switch *ds, int port);
1391
1392#endif
1393