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
25 struct dsa_8021q_context;
26 struct 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 #define DSA_TAG_PROTO_YT921X_VALUE 30
59 #define DSA_TAG_PROTO_MXL_GSW1XX_VALUE 31
60
61 enum dsa_tag_protocol {
62 DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE,
63 DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE,
64 DSA_TAG_PROTO_BRCM_LEGACY = DSA_TAG_PROTO_BRCM_LEGACY_VALUE,
65 DSA_TAG_PROTO_BRCM_LEGACY_FCS = DSA_TAG_PROTO_BRCM_LEGACY_FCS_VALUE,
66 DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE,
67 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE,
68 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE,
69 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE,
70 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE,
71 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE,
72 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE,
73 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE,
74 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE,
75 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE,
76 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE,
77 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE,
78 DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE,
79 DSA_TAG_PROTO_OCELOT = DSA_TAG_PROTO_OCELOT_VALUE,
80 DSA_TAG_PROTO_AR9331 = DSA_TAG_PROTO_AR9331_VALUE,
81 DSA_TAG_PROTO_RTL4_A = DSA_TAG_PROTO_RTL4_A_VALUE,
82 DSA_TAG_PROTO_HELLCREEK = DSA_TAG_PROTO_HELLCREEK_VALUE,
83 DSA_TAG_PROTO_XRS700X = DSA_TAG_PROTO_XRS700X_VALUE,
84 DSA_TAG_PROTO_OCELOT_8021Q = DSA_TAG_PROTO_OCELOT_8021Q_VALUE,
85 DSA_TAG_PROTO_SEVILLE = DSA_TAG_PROTO_SEVILLE_VALUE,
86 DSA_TAG_PROTO_SJA1110 = DSA_TAG_PROTO_SJA1110_VALUE,
87 DSA_TAG_PROTO_RTL8_4 = DSA_TAG_PROTO_RTL8_4_VALUE,
88 DSA_TAG_PROTO_RTL8_4T = DSA_TAG_PROTO_RTL8_4T_VALUE,
89 DSA_TAG_PROTO_RZN1_A5PSW = DSA_TAG_PROTO_RZN1_A5PSW_VALUE,
90 DSA_TAG_PROTO_LAN937X = DSA_TAG_PROTO_LAN937X_VALUE,
91 DSA_TAG_PROTO_VSC73XX_8021Q = DSA_TAG_PROTO_VSC73XX_8021Q_VALUE,
92 DSA_TAG_PROTO_YT921X = DSA_TAG_PROTO_YT921X_VALUE,
93 DSA_TAG_PROTO_MXL_GSW1XX = DSA_TAG_PROTO_MXL_GSW1XX_VALUE,
94 };
95
96 struct dsa_switch;
97
98 struct dsa_device_ops {
99 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev);
100 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev);
101 void (*flow_dissect)(const struct sk_buff *skb, __be16 *proto,
102 int *offset);
103 int (*connect)(struct dsa_switch *ds);
104 void (*disconnect)(struct dsa_switch *ds);
105 unsigned int needed_headroom;
106 unsigned int needed_tailroom;
107 const char *name;
108 enum dsa_tag_protocol proto;
109 /* Some tagging protocols either mangle or shift the destination MAC
110 * address, in which case the DSA conduit would drop packets on ingress
111 * if what it understands out of the destination MAC address is not in
112 * its RX filter.
113 */
114 bool promisc_on_conduit;
115 };
116
117 struct dsa_lag {
118 struct net_device *dev;
119 unsigned int id;
120 struct mutex fdb_lock;
121 struct list_head fdbs;
122 refcount_t refcount;
123 };
124
125 struct dsa_switch_tree {
126 struct list_head list;
127
128 /* List of switch ports */
129 struct list_head ports;
130
131 /* Notifier chain for switch-wide events */
132 struct raw_notifier_head nh;
133
134 /* Tree identifier */
135 unsigned int index;
136
137 /* Number of switches attached to this tree */
138 struct kref refcount;
139
140 /* Maps offloaded LAG netdevs to a zero-based linear ID for
141 * drivers that need it.
142 */
143 struct dsa_lag **lags;
144
145 /* Tagging protocol operations */
146 const struct dsa_device_ops *tag_ops;
147
148 /* Default tagging protocol preferred by the switches in this
149 * tree.
150 */
151 enum dsa_tag_protocol default_proto;
152
153 /* Has this tree been applied to the hardware? */
154 bool setup;
155
156 /*
157 * Configuration data for the platform device that owns
158 * this dsa switch tree instance.
159 */
160 struct dsa_platform_data *pd;
161
162 /* List of DSA links composing the routing table */
163 struct list_head rtable;
164
165 /* Length of "lags" array */
166 unsigned int lags_len;
167
168 /* Track the largest switch index within a tree */
169 unsigned int last_switch;
170 };
171
172 /* LAG IDs are one-based, the dst->lags array is zero-based */
173 #define dsa_lags_foreach_id(_id, _dst) \
174 for ((_id) = 1; (_id) <= (_dst)->lags_len; (_id)++) \
175 if ((_dst)->lags[(_id) - 1])
176
177 #define dsa_lag_foreach_port(_dp, _dst, _lag) \
178 list_for_each_entry((_dp), &(_dst)->ports, list) \
179 if (dsa_port_offloads_lag((_dp), (_lag)))
180
181 #define dsa_hsr_foreach_port(_dp, _ds, _hsr) \
182 list_for_each_entry((_dp), &(_ds)->dst->ports, list) \
183 if ((_dp)->ds == (_ds) && (_dp)->hsr_dev == (_hsr))
184
dsa_lag_by_id(struct dsa_switch_tree * dst,unsigned int id)185 static inline struct dsa_lag *dsa_lag_by_id(struct dsa_switch_tree *dst,
186 unsigned int id)
187 {
188 /* DSA LAG IDs are one-based, dst->lags is zero-based */
189 return dst->lags[id - 1];
190 }
191
dsa_lag_id(struct dsa_switch_tree * dst,struct net_device * lag_dev)192 static inline int dsa_lag_id(struct dsa_switch_tree *dst,
193 struct net_device *lag_dev)
194 {
195 unsigned int id;
196
197 dsa_lags_foreach_id(id, dst) {
198 struct dsa_lag *lag = dsa_lag_by_id(dst, id);
199
200 if (lag->dev == lag_dev)
201 return lag->id;
202 }
203
204 return -ENODEV;
205 }
206
207 /* TC matchall action types */
208 enum dsa_port_mall_action_type {
209 DSA_PORT_MALL_MIRROR,
210 DSA_PORT_MALL_POLICER,
211 };
212
213 /* TC mirroring entry */
214 struct dsa_mall_mirror_tc_entry {
215 u8 to_local_port;
216 bool ingress;
217 };
218
219 /* TC port policer entry */
220 struct dsa_mall_policer_tc_entry {
221 u32 burst;
222 u64 rate_bytes_per_sec;
223 };
224
225 /* TC matchall entry */
226 struct dsa_mall_tc_entry {
227 struct list_head list;
228 unsigned long cookie;
229 enum dsa_port_mall_action_type type;
230 union {
231 struct dsa_mall_mirror_tc_entry mirror;
232 struct dsa_mall_policer_tc_entry policer;
233 };
234 };
235
236 struct dsa_bridge {
237 struct net_device *dev;
238 unsigned int num;
239 bool tx_fwd_offload;
240 refcount_t refcount;
241 };
242
243 struct dsa_port {
244 /* A CPU port is physically connected to a conduit device. A user port
245 * exposes a network device to user-space, called 'user' here.
246 */
247 union {
248 struct net_device *conduit;
249 struct net_device *user;
250 };
251
252 /* Copy of the tagging protocol operations, for quicker access
253 * in the data path. Valid only for the CPU ports.
254 */
255 const struct dsa_device_ops *tag_ops;
256
257 /* Copies for faster access in conduit receive hot path */
258 struct dsa_switch_tree *dst;
259 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev);
260
261 struct dsa_switch *ds;
262
263 unsigned int index;
264
265 enum {
266 DSA_PORT_TYPE_UNUSED = 0,
267 DSA_PORT_TYPE_CPU,
268 DSA_PORT_TYPE_DSA,
269 DSA_PORT_TYPE_USER,
270 } type;
271
272 const char *name;
273 struct dsa_port *cpu_dp;
274 u8 mac[ETH_ALEN];
275
276 u8 stp_state;
277
278 /* Warning: the following bit fields are not atomic, and updating them
279 * can only be done from code paths where concurrency is not possible
280 * (probe time or under rtnl_lock).
281 */
282 u8 vlan_filtering:1;
283
284 /* Managed by DSA on user ports and by drivers on CPU and DSA ports */
285 u8 learning:1;
286
287 u8 lag_tx_enabled:1;
288
289 /* conduit state bits, valid only on CPU ports */
290 u8 conduit_admin_up:1;
291 u8 conduit_oper_up:1;
292
293 /* Valid only on user ports */
294 u8 cpu_port_in_lag:1;
295
296 u8 setup:1;
297
298 struct device_node *dn;
299 unsigned int ageing_time;
300
301 struct dsa_bridge *bridge;
302 struct devlink_port devlink_port;
303 struct phylink *pl;
304 struct phylink_config pl_config;
305 netdevice_tracker conduit_tracker;
306 struct dsa_lag *lag;
307 struct net_device *hsr_dev;
308
309 struct list_head list;
310
311 /*
312 * Original copy of the conduit netdev ethtool_ops
313 */
314 const struct ethtool_ops *orig_ethtool_ops;
315
316 /* List of MAC addresses that must be forwarded on this port.
317 * These are only valid on CPU ports and DSA links.
318 */
319 struct mutex addr_lists_lock;
320 struct list_head fdbs;
321 struct list_head mdbs;
322
323 struct mutex vlans_lock;
324 union {
325 /* List of VLANs that CPU and DSA ports are members of.
326 * Access to this is serialized by the sleepable @vlans_lock.
327 */
328 struct list_head vlans;
329 /* List of VLANs that user ports are members of.
330 * Access to this is serialized by netif_addr_lock_bh().
331 */
332 struct list_head user_vlans;
333 };
334 };
335
336 static inline struct dsa_port *
dsa_phylink_to_port(struct phylink_config * config)337 dsa_phylink_to_port(struct phylink_config *config)
338 {
339 return container_of(config, struct dsa_port, pl_config);
340 }
341
342 /* TODO: ideally DSA ports would have a single dp->link_dp member,
343 * and no dst->rtable nor this struct dsa_link would be needed,
344 * but this would require some more complex tree walking,
345 * so keep it stupid at the moment and list them all.
346 */
347 struct dsa_link {
348 struct dsa_port *dp;
349 struct dsa_port *link_dp;
350 struct list_head list;
351 };
352
353 enum dsa_db_type {
354 DSA_DB_PORT,
355 DSA_DB_LAG,
356 DSA_DB_BRIDGE,
357 };
358
359 struct dsa_db {
360 enum dsa_db_type type;
361
362 union {
363 const struct dsa_port *dp;
364 struct dsa_lag lag;
365 struct dsa_bridge bridge;
366 };
367 };
368
369 struct dsa_mac_addr {
370 unsigned char addr[ETH_ALEN];
371 u16 vid;
372 refcount_t refcount;
373 struct list_head list;
374 struct dsa_db db;
375 };
376
377 struct dsa_vlan {
378 u16 vid;
379 refcount_t refcount;
380 struct list_head list;
381 };
382
383 struct dsa_switch {
384 struct device *dev;
385
386 /*
387 * Parent switch tree, and switch index.
388 */
389 struct dsa_switch_tree *dst;
390 unsigned int index;
391
392 /* Warning: the following bit fields are not atomic, and updating them
393 * can only be done from code paths where concurrency is not possible
394 * (probe time or under rtnl_lock).
395 */
396 u32 setup:1;
397
398 /* Disallow bridge core from requesting different VLAN awareness
399 * settings on ports if not hardware-supported
400 */
401 u32 vlan_filtering_is_global:1;
402
403 /* Keep VLAN filtering enabled on ports not offloading any upper */
404 u32 needs_standalone_vlan_filtering:1;
405
406 /* Pass .port_vlan_add and .port_vlan_del to drivers even for bridges
407 * that have vlan_filtering=0. All drivers should ideally set this (and
408 * then the option would get removed), but it is unknown whether this
409 * would break things or not.
410 */
411 u32 configure_vlan_while_not_filtering:1;
412
413 /* Pop the default_pvid of VLAN-unaware bridge ports from tagged frames.
414 * DEPRECATED: Do NOT set this field in new drivers. Instead look at
415 * the dsa_software_vlan_untag() comments.
416 */
417 u32 untag_bridge_pvid:1;
418 /* Pop the default_pvid of VLAN-aware bridge ports from tagged frames.
419 * Useful if the switch cannot preserve the VLAN tag as seen on the
420 * wire for user port ingress, and chooses to send all frames as
421 * VLAN-tagged to the CPU, including those which were originally
422 * untagged.
423 */
424 u32 untag_vlan_aware_bridge_pvid:1;
425
426 /* Let DSA manage the FDB entries towards the
427 * CPU, based on the software bridge database.
428 */
429 u32 assisted_learning_on_cpu_port:1;
430
431 /* In case vlan_filtering_is_global is set, the VLAN awareness state
432 * should be retrieved from here and not from the per-port settings.
433 */
434 u32 vlan_filtering:1;
435
436 /* For switches that only have the MRU configurable. To ensure the
437 * configured MTU is not exceeded, normalization of MRU on all bridged
438 * interfaces is needed.
439 */
440 u32 mtu_enforcement_ingress:1;
441
442 /* Drivers that isolate the FDBs of multiple bridges must set this
443 * to true to receive the bridge as an argument in .port_fdb_{add,del}
444 * and .port_mdb_{add,del}. Otherwise, the bridge.num will always be
445 * passed as zero.
446 */
447 u32 fdb_isolation:1;
448
449 /* Drivers that have global DSCP mapping settings must set this to
450 * true to automatically apply the settings to all ports.
451 */
452 u32 dscp_prio_mapping_is_global:1;
453
454 /* Listener for switch fabric events */
455 struct notifier_block nb;
456
457 /*
458 * Give the switch driver somewhere to hang its private data
459 * structure.
460 */
461 void *priv;
462
463 void *tagger_data;
464
465 /*
466 * Configuration data for this switch.
467 */
468 struct dsa_chip_data *cd;
469
470 /*
471 * The switch operations.
472 */
473 const struct dsa_switch_ops *ops;
474
475 /*
476 * Allow a DSA switch driver to override the phylink MAC ops
477 */
478 const struct phylink_mac_ops *phylink_mac_ops;
479
480 /*
481 * User mii_bus and devices for the individual ports.
482 */
483 u32 phys_mii_mask;
484 struct mii_bus *user_mii_bus;
485
486 /* Ageing Time limits in msecs */
487 unsigned int ageing_time_min;
488 unsigned int ageing_time_max;
489
490 /* Storage for drivers using tag_8021q */
491 struct dsa_8021q_context *tag_8021q_ctx;
492
493 /* devlink used to represent this switch device */
494 struct devlink *devlink;
495
496 /* Number of switch port queues */
497 unsigned int num_tx_queues;
498
499 /* Drivers that benefit from having an ID associated with each
500 * offloaded LAG should set this to the maximum number of
501 * supported IDs. DSA will then maintain a mapping of _at
502 * least_ these many IDs, accessible to drivers via
503 * dsa_lag_id().
504 */
505 unsigned int num_lag_ids;
506
507 /* Drivers that support bridge forwarding offload or FDB isolation
508 * should set this to the maximum number of bridges spanning the same
509 * switch tree (or all trees, in the case of cross-tree bridging
510 * support) that can be offloaded.
511 */
512 unsigned int max_num_bridges;
513
514 unsigned int num_ports;
515 };
516
dsa_to_port(struct dsa_switch * ds,int p)517 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
518 {
519 struct dsa_switch_tree *dst = ds->dst;
520 struct dsa_port *dp;
521
522 list_for_each_entry(dp, &dst->ports, list)
523 if (dp->ds == ds && dp->index == p)
524 return dp;
525
526 return NULL;
527 }
528
dsa_port_is_dsa(struct dsa_port * port)529 static inline bool dsa_port_is_dsa(struct dsa_port *port)
530 {
531 return port->type == DSA_PORT_TYPE_DSA;
532 }
533
dsa_port_is_cpu(struct dsa_port * port)534 static inline bool dsa_port_is_cpu(struct dsa_port *port)
535 {
536 return port->type == DSA_PORT_TYPE_CPU;
537 }
538
dsa_port_is_user(struct dsa_port * dp)539 static inline bool dsa_port_is_user(struct dsa_port *dp)
540 {
541 return dp->type == DSA_PORT_TYPE_USER;
542 }
543
dsa_port_is_unused(struct dsa_port * dp)544 static inline bool dsa_port_is_unused(struct dsa_port *dp)
545 {
546 return dp->type == DSA_PORT_TYPE_UNUSED;
547 }
548
dsa_port_conduit_is_operational(struct dsa_port * dp)549 static inline bool dsa_port_conduit_is_operational(struct dsa_port *dp)
550 {
551 return dsa_port_is_cpu(dp) && dp->conduit_admin_up &&
552 dp->conduit_oper_up;
553 }
554
dsa_is_unused_port(struct dsa_switch * ds,int p)555 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p)
556 {
557 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED;
558 }
559
dsa_is_cpu_port(struct dsa_switch * ds,int p)560 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
561 {
562 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU;
563 }
564
dsa_is_dsa_port(struct dsa_switch * ds,int p)565 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
566 {
567 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA;
568 }
569
dsa_is_user_port(struct dsa_switch * ds,int p)570 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p)
571 {
572 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER;
573 }
574
575 #define dsa_tree_for_each_user_port(_dp, _dst) \
576 list_for_each_entry((_dp), &(_dst)->ports, list) \
577 if (dsa_port_is_user((_dp)))
578
579 #define dsa_tree_for_each_user_port_continue_reverse(_dp, _dst) \
580 list_for_each_entry_continue_reverse((_dp), &(_dst)->ports, list) \
581 if (dsa_port_is_user((_dp)))
582
583 #define dsa_tree_for_each_cpu_port(_dp, _dst) \
584 list_for_each_entry((_dp), &(_dst)->ports, list) \
585 if (dsa_port_is_cpu((_dp)))
586
587 #define dsa_switch_for_each_port(_dp, _ds) \
588 list_for_each_entry((_dp), &(_ds)->dst->ports, list) \
589 if ((_dp)->ds == (_ds))
590
591 #define dsa_switch_for_each_port_safe(_dp, _next, _ds) \
592 list_for_each_entry_safe((_dp), (_next), &(_ds)->dst->ports, list) \
593 if ((_dp)->ds == (_ds))
594
595 #define dsa_switch_for_each_port_continue_reverse(_dp, _ds) \
596 list_for_each_entry_continue_reverse((_dp), &(_ds)->dst->ports, list) \
597 if ((_dp)->ds == (_ds))
598
599 #define dsa_switch_for_each_available_port(_dp, _ds) \
600 dsa_switch_for_each_port((_dp), (_ds)) \
601 if (!dsa_port_is_unused((_dp)))
602
603 #define dsa_switch_for_each_user_port(_dp, _ds) \
604 dsa_switch_for_each_port((_dp), (_ds)) \
605 if (dsa_port_is_user((_dp)))
606
607 #define dsa_switch_for_each_user_port_continue_reverse(_dp, _ds) \
608 dsa_switch_for_each_port_continue_reverse((_dp), (_ds)) \
609 if (dsa_port_is_user((_dp)))
610
611 #define dsa_switch_for_each_cpu_port(_dp, _ds) \
612 dsa_switch_for_each_port((_dp), (_ds)) \
613 if (dsa_port_is_cpu((_dp)))
614
615 #define dsa_switch_for_each_cpu_port_continue_reverse(_dp, _ds) \
616 dsa_switch_for_each_port_continue_reverse((_dp), (_ds)) \
617 if (dsa_port_is_cpu((_dp)))
618
dsa_user_ports(struct dsa_switch * ds)619 static inline u32 dsa_user_ports(struct dsa_switch *ds)
620 {
621 struct dsa_port *dp;
622 u32 mask = 0;
623
624 dsa_switch_for_each_user_port(dp, ds)
625 mask |= BIT(dp->index);
626
627 return mask;
628 }
629
dsa_cpu_ports(struct dsa_switch * ds)630 static inline u32 dsa_cpu_ports(struct dsa_switch *ds)
631 {
632 struct dsa_port *cpu_dp;
633 u32 mask = 0;
634
635 dsa_switch_for_each_cpu_port(cpu_dp, ds)
636 mask |= BIT(cpu_dp->index);
637
638 return mask;
639 }
640
641 /* Return the local port used to reach an arbitrary switch device */
dsa_routing_port(struct dsa_switch * ds,int device)642 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device)
643 {
644 struct dsa_switch_tree *dst = ds->dst;
645 struct dsa_link *dl;
646
647 list_for_each_entry(dl, &dst->rtable, list)
648 if (dl->dp->ds == ds && dl->link_dp->ds->index == device)
649 return dl->dp->index;
650
651 return ds->num_ports;
652 }
653
654 /* Return the local port used to reach an arbitrary switch port */
dsa_towards_port(struct dsa_switch * ds,int device,int port)655 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device,
656 int port)
657 {
658 if (device == ds->index)
659 return port;
660 else
661 return dsa_routing_port(ds, device);
662 }
663
664 /* Return the local port used to reach the dedicated CPU port */
dsa_upstream_port(struct dsa_switch * ds,int port)665 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port)
666 {
667 const struct dsa_port *dp = dsa_to_port(ds, port);
668 const struct dsa_port *cpu_dp = dp->cpu_dp;
669
670 if (!cpu_dp)
671 return port;
672
673 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index);
674 }
675
676 /* Return true if this is the local port used to reach the CPU port */
dsa_is_upstream_port(struct dsa_switch * ds,int port)677 static inline bool dsa_is_upstream_port(struct dsa_switch *ds, int port)
678 {
679 if (dsa_is_unused_port(ds, port))
680 return false;
681
682 return port == dsa_upstream_port(ds, port);
683 }
684
685 /* Return true if this is a DSA port leading away from the CPU */
dsa_is_downstream_port(struct dsa_switch * ds,int port)686 static inline bool dsa_is_downstream_port(struct dsa_switch *ds, int port)
687 {
688 return dsa_is_dsa_port(ds, port) && !dsa_is_upstream_port(ds, port);
689 }
690
691 /* Return the local port used to reach the CPU port */
dsa_switch_upstream_port(struct dsa_switch * ds)692 static inline unsigned int dsa_switch_upstream_port(struct dsa_switch *ds)
693 {
694 struct dsa_port *dp;
695
696 dsa_switch_for_each_available_port(dp, ds) {
697 return dsa_upstream_port(ds, dp->index);
698 }
699
700 return ds->num_ports;
701 }
702
703 /* Return true if @upstream_ds is an upstream switch of @downstream_ds, meaning
704 * that the routing port from @downstream_ds to @upstream_ds is also the port
705 * which @downstream_ds uses to reach its dedicated CPU.
706 */
dsa_switch_is_upstream_of(struct dsa_switch * upstream_ds,struct dsa_switch * downstream_ds)707 static inline bool dsa_switch_is_upstream_of(struct dsa_switch *upstream_ds,
708 struct dsa_switch *downstream_ds)
709 {
710 int routing_port;
711
712 if (upstream_ds == downstream_ds)
713 return true;
714
715 routing_port = dsa_routing_port(downstream_ds, upstream_ds->index);
716
717 return dsa_is_upstream_port(downstream_ds, routing_port);
718 }
719
dsa_port_is_vlan_filtering(const struct dsa_port * dp)720 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp)
721 {
722 const struct dsa_switch *ds = dp->ds;
723
724 if (ds->vlan_filtering_is_global)
725 return ds->vlan_filtering;
726 else
727 return dp->vlan_filtering;
728 }
729
dsa_port_lag_id_get(struct dsa_port * dp)730 static inline unsigned int dsa_port_lag_id_get(struct dsa_port *dp)
731 {
732 return dp->lag ? dp->lag->id : 0;
733 }
734
dsa_port_lag_dev_get(struct dsa_port * dp)735 static inline struct net_device *dsa_port_lag_dev_get(struct dsa_port *dp)
736 {
737 return dp->lag ? dp->lag->dev : NULL;
738 }
739
dsa_port_offloads_lag(struct dsa_port * dp,const struct dsa_lag * lag)740 static inline bool dsa_port_offloads_lag(struct dsa_port *dp,
741 const struct dsa_lag *lag)
742 {
743 return dsa_port_lag_dev_get(dp) == lag->dev;
744 }
745
dsa_port_to_conduit(const struct dsa_port * dp)746 static inline struct net_device *dsa_port_to_conduit(const struct dsa_port *dp)
747 {
748 if (dp->cpu_port_in_lag)
749 return dsa_port_lag_dev_get(dp->cpu_dp);
750
751 return dp->cpu_dp->conduit;
752 }
753
754 static inline
dsa_port_to_bridge_port(const struct dsa_port * dp)755 struct net_device *dsa_port_to_bridge_port(const struct dsa_port *dp)
756 {
757 if (!dp->bridge)
758 return NULL;
759
760 if (dp->lag)
761 return dp->lag->dev;
762 else if (dp->hsr_dev)
763 return dp->hsr_dev;
764
765 return dp->user;
766 }
767
768 static inline struct net_device *
dsa_port_bridge_dev_get(const struct dsa_port * dp)769 dsa_port_bridge_dev_get(const struct dsa_port *dp)
770 {
771 return dp->bridge ? dp->bridge->dev : NULL;
772 }
773
dsa_port_bridge_num_get(struct dsa_port * dp)774 static inline unsigned int dsa_port_bridge_num_get(struct dsa_port *dp)
775 {
776 return dp->bridge ? dp->bridge->num : 0;
777 }
778
dsa_port_bridge_same(const struct dsa_port * a,const struct dsa_port * b)779 static inline bool dsa_port_bridge_same(const struct dsa_port *a,
780 const struct dsa_port *b)
781 {
782 struct net_device *br_a = dsa_port_bridge_dev_get(a);
783 struct net_device *br_b = dsa_port_bridge_dev_get(b);
784
785 /* Standalone ports are not in the same bridge with one another */
786 return (!br_a || !br_b) ? false : (br_a == br_b);
787 }
788
dsa_port_offloads_bridge_port(struct dsa_port * dp,const struct net_device * dev)789 static inline bool dsa_port_offloads_bridge_port(struct dsa_port *dp,
790 const struct net_device *dev)
791 {
792 return dsa_port_to_bridge_port(dp) == dev;
793 }
794
795 static inline bool
dsa_port_offloads_bridge_dev(struct dsa_port * dp,const struct net_device * bridge_dev)796 dsa_port_offloads_bridge_dev(struct dsa_port *dp,
797 const struct net_device *bridge_dev)
798 {
799 /* DSA ports connected to a bridge, and event was emitted
800 * for the bridge.
801 */
802 return dsa_port_bridge_dev_get(dp) == bridge_dev;
803 }
804
dsa_port_offloads_bridge(struct dsa_port * dp,const struct dsa_bridge * bridge)805 static inline bool dsa_port_offloads_bridge(struct dsa_port *dp,
806 const struct dsa_bridge *bridge)
807 {
808 return dsa_port_bridge_dev_get(dp) == bridge->dev;
809 }
810
811 /* Returns true if any port of this tree offloads the given net_device */
dsa_tree_offloads_bridge_port(struct dsa_switch_tree * dst,const struct net_device * dev)812 static inline bool dsa_tree_offloads_bridge_port(struct dsa_switch_tree *dst,
813 const struct net_device *dev)
814 {
815 struct dsa_port *dp;
816
817 list_for_each_entry(dp, &dst->ports, list)
818 if (dsa_port_offloads_bridge_port(dp, dev))
819 return true;
820
821 return false;
822 }
823
824 /* Returns true if any port of this tree offloads the given bridge */
825 static inline bool
dsa_tree_offloads_bridge_dev(struct dsa_switch_tree * dst,const struct net_device * bridge_dev)826 dsa_tree_offloads_bridge_dev(struct dsa_switch_tree *dst,
827 const struct net_device *bridge_dev)
828 {
829 struct dsa_port *dp;
830
831 list_for_each_entry(dp, &dst->ports, list)
832 if (dsa_port_offloads_bridge_dev(dp, bridge_dev))
833 return true;
834
835 return false;
836 }
837
dsa_port_tree_same(const struct dsa_port * a,const struct dsa_port * b)838 static inline bool dsa_port_tree_same(const struct dsa_port *a,
839 const struct dsa_port *b)
840 {
841 return a->ds->dst == b->ds->dst;
842 }
843
844 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
845 bool is_static, void *data);
846 struct dsa_switch_ops {
847 /*
848 * Tagging protocol helpers called for the CPU ports and DSA links.
849 * @get_tag_protocol retrieves the initial tagging protocol and is
850 * mandatory. Switches which can operate using multiple tagging
851 * protocols should implement @change_tag_protocol and report in
852 * @get_tag_protocol the tagger in current use.
853 */
854 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds,
855 int port,
856 enum dsa_tag_protocol mprot);
857 int (*change_tag_protocol)(struct dsa_switch *ds,
858 enum dsa_tag_protocol proto);
859 /*
860 * Method for switch drivers to connect to the tagging protocol driver
861 * in current use. The switch driver can provide handlers for certain
862 * types of packets for switch management.
863 */
864 int (*connect_tag_protocol)(struct dsa_switch *ds,
865 enum dsa_tag_protocol proto);
866
867 int (*port_change_conduit)(struct dsa_switch *ds, int port,
868 struct net_device *conduit,
869 struct netlink_ext_ack *extack);
870
871 /* Optional switch-wide initialization and destruction methods */
872 int (*setup)(struct dsa_switch *ds);
873 void (*teardown)(struct dsa_switch *ds);
874
875 /* Per-port initialization and destruction methods. Mandatory if the
876 * driver registers devlink port regions, optional otherwise.
877 */
878 int (*port_setup)(struct dsa_switch *ds, int port);
879 void (*port_teardown)(struct dsa_switch *ds, int port);
880
881 u32 (*get_phy_flags)(struct dsa_switch *ds, int port);
882
883 /*
884 * Access to the switch's PHY registers.
885 */
886 int (*phy_read)(struct dsa_switch *ds, int port, int regnum);
887 int (*phy_write)(struct dsa_switch *ds, int port,
888 int regnum, u16 val);
889
890 /*
891 * PHYLINK integration
892 */
893 void (*phylink_get_caps)(struct dsa_switch *ds, int port,
894 struct phylink_config *config);
895 void (*phylink_fixed_state)(struct dsa_switch *ds, int port,
896 struct phylink_link_state *state);
897 /*
898 * Port statistics counters.
899 */
900 void (*get_strings)(struct dsa_switch *ds, int port,
901 u32 stringset, uint8_t *data);
902 void (*get_ethtool_stats)(struct dsa_switch *ds,
903 int port, uint64_t *data);
904 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset);
905 void (*get_ethtool_phy_stats)(struct dsa_switch *ds,
906 int port, uint64_t *data);
907 void (*get_eth_phy_stats)(struct dsa_switch *ds, int port,
908 struct ethtool_eth_phy_stats *phy_stats);
909 void (*get_eth_mac_stats)(struct dsa_switch *ds, int port,
910 struct ethtool_eth_mac_stats *mac_stats);
911 void (*get_eth_ctrl_stats)(struct dsa_switch *ds, int port,
912 struct ethtool_eth_ctrl_stats *ctrl_stats);
913 void (*get_rmon_stats)(struct dsa_switch *ds, int port,
914 struct ethtool_rmon_stats *rmon_stats,
915 const struct ethtool_rmon_hist_range **ranges);
916 void (*get_ts_stats)(struct dsa_switch *ds, int port,
917 struct ethtool_ts_stats *ts_stats);
918 void (*get_stats64)(struct dsa_switch *ds, int port,
919 struct rtnl_link_stats64 *s);
920 void (*get_pause_stats)(struct dsa_switch *ds, int port,
921 struct ethtool_pause_stats *pause_stats);
922 void (*self_test)(struct dsa_switch *ds, int port,
923 struct ethtool_test *etest, u64 *data);
924
925 /*
926 * ethtool Wake-on-LAN
927 */
928 void (*get_wol)(struct dsa_switch *ds, int port,
929 struct ethtool_wolinfo *w);
930 int (*set_wol)(struct dsa_switch *ds, int port,
931 struct ethtool_wolinfo *w);
932
933 /*
934 * ethtool timestamp info
935 */
936 int (*get_ts_info)(struct dsa_switch *ds, int port,
937 struct kernel_ethtool_ts_info *ts);
938
939 /*
940 * ethtool MAC merge layer
941 */
942 int (*get_mm)(struct dsa_switch *ds, int port,
943 struct ethtool_mm_state *state);
944 int (*set_mm)(struct dsa_switch *ds, int port,
945 struct ethtool_mm_cfg *cfg,
946 struct netlink_ext_ack *extack);
947 void (*get_mm_stats)(struct dsa_switch *ds, int port,
948 struct ethtool_mm_stats *stats);
949
950 /*
951 * DCB ops
952 */
953 int (*port_get_default_prio)(struct dsa_switch *ds, int port);
954 int (*port_set_default_prio)(struct dsa_switch *ds, int port,
955 u8 prio);
956 int (*port_get_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp);
957 int (*port_add_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp,
958 u8 prio);
959 int (*port_del_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp,
960 u8 prio);
961 int (*port_set_apptrust)(struct dsa_switch *ds, int port,
962 const u8 *sel, int nsel);
963 int (*port_get_apptrust)(struct dsa_switch *ds, int port, u8 *sel,
964 int *nsel);
965
966 /*
967 * Suspend and resume
968 */
969 int (*suspend)(struct dsa_switch *ds);
970 int (*resume)(struct dsa_switch *ds);
971
972 /*
973 * Port enable/disable
974 */
975 int (*port_enable)(struct dsa_switch *ds, int port,
976 struct phy_device *phy);
977 void (*port_disable)(struct dsa_switch *ds, int port);
978
979
980 /*
981 * Notification for MAC address changes on user ports. Drivers can
982 * currently only veto operations. They should not use the method to
983 * program the hardware, since the operation is not rolled back in case
984 * of other errors.
985 */
986 int (*port_set_mac_address)(struct dsa_switch *ds, int port,
987 const unsigned char *addr);
988
989 /*
990 * Compatibility between device trees defining multiple CPU ports and
991 * drivers which are not OK to use by default the numerically smallest
992 * CPU port of a switch for its local ports. This can return NULL,
993 * meaning "don't know/don't care".
994 */
995 struct dsa_port *(*preferred_default_local_cpu_port)(struct dsa_switch *ds);
996
997 /*
998 * Port's MAC EEE settings
999 */
1000 bool (*support_eee)(struct dsa_switch *ds, int port);
1001 int (*set_mac_eee)(struct dsa_switch *ds, int port,
1002 struct ethtool_keee *e);
1003
1004 /* EEPROM access */
1005 int (*get_eeprom_len)(struct dsa_switch *ds);
1006 int (*get_eeprom)(struct dsa_switch *ds,
1007 struct ethtool_eeprom *eeprom, u8 *data);
1008 int (*set_eeprom)(struct dsa_switch *ds,
1009 struct ethtool_eeprom *eeprom, u8 *data);
1010
1011 /*
1012 * Register access.
1013 */
1014 int (*get_regs_len)(struct dsa_switch *ds, int port);
1015 void (*get_regs)(struct dsa_switch *ds, int port,
1016 struct ethtool_regs *regs, void *p);
1017
1018 /*
1019 * Upper device tracking.
1020 */
1021 int (*port_prechangeupper)(struct dsa_switch *ds, int port,
1022 struct netdev_notifier_changeupper_info *info);
1023
1024 /*
1025 * Bridge integration
1026 */
1027 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs);
1028 int (*port_bridge_join)(struct dsa_switch *ds, int port,
1029 struct dsa_bridge bridge,
1030 bool *tx_fwd_offload,
1031 struct netlink_ext_ack *extack);
1032 void (*port_bridge_leave)(struct dsa_switch *ds, int port,
1033 struct dsa_bridge bridge);
1034 void (*port_stp_state_set)(struct dsa_switch *ds, int port,
1035 u8 state);
1036 int (*port_mst_state_set)(struct dsa_switch *ds, int port,
1037 const struct switchdev_mst_state *state);
1038 void (*port_fast_age)(struct dsa_switch *ds, int port);
1039 int (*port_vlan_fast_age)(struct dsa_switch *ds, int port, u16 vid);
1040 int (*port_pre_bridge_flags)(struct dsa_switch *ds, int port,
1041 struct switchdev_brport_flags flags,
1042 struct netlink_ext_ack *extack);
1043 int (*port_bridge_flags)(struct dsa_switch *ds, int port,
1044 struct switchdev_brport_flags flags,
1045 struct netlink_ext_ack *extack);
1046 void (*port_set_host_flood)(struct dsa_switch *ds, int port,
1047 bool uc, bool mc);
1048
1049 /*
1050 * VLAN support
1051 */
1052 int (*port_vlan_filtering)(struct dsa_switch *ds, int port,
1053 bool vlan_filtering,
1054 struct netlink_ext_ack *extack);
1055 int (*port_vlan_add)(struct dsa_switch *ds, int port,
1056 const struct switchdev_obj_port_vlan *vlan,
1057 struct netlink_ext_ack *extack);
1058 int (*port_vlan_del)(struct dsa_switch *ds, int port,
1059 const struct switchdev_obj_port_vlan *vlan);
1060 int (*vlan_msti_set)(struct dsa_switch *ds, struct dsa_bridge bridge,
1061 const struct switchdev_vlan_msti *msti);
1062
1063 /*
1064 * Forwarding database
1065 */
1066 int (*port_fdb_add)(struct dsa_switch *ds, int port,
1067 const unsigned char *addr, u16 vid,
1068 struct dsa_db db);
1069 int (*port_fdb_del)(struct dsa_switch *ds, int port,
1070 const unsigned char *addr, u16 vid,
1071 struct dsa_db db);
1072 int (*port_fdb_dump)(struct dsa_switch *ds, int port,
1073 dsa_fdb_dump_cb_t *cb, void *data);
1074 int (*lag_fdb_add)(struct dsa_switch *ds, struct dsa_lag lag,
1075 const unsigned char *addr, u16 vid,
1076 struct dsa_db db);
1077 int (*lag_fdb_del)(struct dsa_switch *ds, struct dsa_lag lag,
1078 const unsigned char *addr, u16 vid,
1079 struct dsa_db db);
1080
1081 /*
1082 * Multicast database
1083 */
1084 int (*port_mdb_add)(struct dsa_switch *ds, int port,
1085 const struct switchdev_obj_port_mdb *mdb,
1086 struct dsa_db db);
1087 int (*port_mdb_del)(struct dsa_switch *ds, int port,
1088 const struct switchdev_obj_port_mdb *mdb,
1089 struct dsa_db db);
1090 /*
1091 * RXNFC
1092 */
1093 int (*get_rxnfc)(struct dsa_switch *ds, int port,
1094 struct ethtool_rxnfc *nfc, u32 *rule_locs);
1095 int (*set_rxnfc)(struct dsa_switch *ds, int port,
1096 struct ethtool_rxnfc *nfc);
1097
1098 /*
1099 * TC integration
1100 */
1101 int (*cls_flower_add)(struct dsa_switch *ds, int port,
1102 struct flow_cls_offload *cls, bool ingress);
1103 int (*cls_flower_del)(struct dsa_switch *ds, int port,
1104 struct flow_cls_offload *cls, bool ingress);
1105 int (*cls_flower_stats)(struct dsa_switch *ds, int port,
1106 struct flow_cls_offload *cls, bool ingress);
1107 int (*port_mirror_add)(struct dsa_switch *ds, int port,
1108 struct dsa_mall_mirror_tc_entry *mirror,
1109 bool ingress, struct netlink_ext_ack *extack);
1110 void (*port_mirror_del)(struct dsa_switch *ds, int port,
1111 struct dsa_mall_mirror_tc_entry *mirror);
1112 int (*port_policer_add)(struct dsa_switch *ds, int port,
1113 struct dsa_mall_policer_tc_entry *policer);
1114 void (*port_policer_del)(struct dsa_switch *ds, int port);
1115 int (*port_setup_tc)(struct dsa_switch *ds, int port,
1116 enum tc_setup_type type, void *type_data);
1117
1118 /*
1119 * Cross-chip operations
1120 */
1121 int (*crosschip_bridge_join)(struct dsa_switch *ds, int tree_index,
1122 int sw_index, int port,
1123 struct dsa_bridge bridge,
1124 struct netlink_ext_ack *extack);
1125 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index,
1126 int sw_index, int port,
1127 struct dsa_bridge bridge);
1128 int (*crosschip_lag_change)(struct dsa_switch *ds, int sw_index,
1129 int port);
1130 int (*crosschip_lag_join)(struct dsa_switch *ds, int sw_index,
1131 int port, struct dsa_lag lag,
1132 struct netdev_lag_upper_info *info,
1133 struct netlink_ext_ack *extack);
1134 int (*crosschip_lag_leave)(struct dsa_switch *ds, int sw_index,
1135 int port, struct dsa_lag lag);
1136
1137 /*
1138 * PTP functionality
1139 */
1140 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port,
1141 struct kernel_hwtstamp_config *config);
1142 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port,
1143 struct kernel_hwtstamp_config *config,
1144 struct netlink_ext_ack *extack);
1145 void (*port_txtstamp)(struct dsa_switch *ds, int port,
1146 struct sk_buff *skb);
1147 bool (*port_rxtstamp)(struct dsa_switch *ds, int port,
1148 struct sk_buff *skb, unsigned int type);
1149
1150 /* Devlink parameters, etc */
1151 int (*devlink_param_get)(struct dsa_switch *ds, u32 id,
1152 struct devlink_param_gset_ctx *ctx);
1153 int (*devlink_param_set)(struct dsa_switch *ds, u32 id,
1154 struct devlink_param_gset_ctx *ctx);
1155 int (*devlink_info_get)(struct dsa_switch *ds,
1156 struct devlink_info_req *req,
1157 struct netlink_ext_ack *extack);
1158 int (*devlink_sb_pool_get)(struct dsa_switch *ds,
1159 unsigned int sb_index, u16 pool_index,
1160 struct devlink_sb_pool_info *pool_info);
1161 int (*devlink_sb_pool_set)(struct dsa_switch *ds, unsigned int sb_index,
1162 u16 pool_index, u32 size,
1163 enum devlink_sb_threshold_type threshold_type,
1164 struct netlink_ext_ack *extack);
1165 int (*devlink_sb_port_pool_get)(struct dsa_switch *ds, int port,
1166 unsigned int sb_index, u16 pool_index,
1167 u32 *p_threshold);
1168 int (*devlink_sb_port_pool_set)(struct dsa_switch *ds, int port,
1169 unsigned int sb_index, u16 pool_index,
1170 u32 threshold,
1171 struct netlink_ext_ack *extack);
1172 int (*devlink_sb_tc_pool_bind_get)(struct dsa_switch *ds, int port,
1173 unsigned int sb_index, u16 tc_index,
1174 enum devlink_sb_pool_type pool_type,
1175 u16 *p_pool_index, u32 *p_threshold);
1176 int (*devlink_sb_tc_pool_bind_set)(struct dsa_switch *ds, int port,
1177 unsigned int sb_index, u16 tc_index,
1178 enum devlink_sb_pool_type pool_type,
1179 u16 pool_index, u32 threshold,
1180 struct netlink_ext_ack *extack);
1181 int (*devlink_sb_occ_snapshot)(struct dsa_switch *ds,
1182 unsigned int sb_index);
1183 int (*devlink_sb_occ_max_clear)(struct dsa_switch *ds,
1184 unsigned int sb_index);
1185 int (*devlink_sb_occ_port_pool_get)(struct dsa_switch *ds, int port,
1186 unsigned int sb_index, u16 pool_index,
1187 u32 *p_cur, u32 *p_max);
1188 int (*devlink_sb_occ_tc_port_bind_get)(struct dsa_switch *ds, int port,
1189 unsigned int sb_index, u16 tc_index,
1190 enum devlink_sb_pool_type pool_type,
1191 u32 *p_cur, u32 *p_max);
1192
1193 /*
1194 * MTU change functionality. Switches can also adjust their MRU through
1195 * this method. By MTU, one understands the SDU (L2 payload) length.
1196 * If the switch needs to account for the DSA tag on the CPU port, this
1197 * method needs to do so privately.
1198 */
1199 int (*port_change_mtu)(struct dsa_switch *ds, int port,
1200 int new_mtu);
1201 int (*port_max_mtu)(struct dsa_switch *ds, int port);
1202
1203 /*
1204 * LAG integration
1205 */
1206 int (*port_lag_change)(struct dsa_switch *ds, int port);
1207 int (*port_lag_join)(struct dsa_switch *ds, int port,
1208 struct dsa_lag lag,
1209 struct netdev_lag_upper_info *info,
1210 struct netlink_ext_ack *extack);
1211 int (*port_lag_leave)(struct dsa_switch *ds, int port,
1212 struct dsa_lag lag);
1213
1214 /*
1215 * HSR integration
1216 */
1217 int (*port_hsr_join)(struct dsa_switch *ds, int port,
1218 struct net_device *hsr,
1219 struct netlink_ext_ack *extack);
1220 int (*port_hsr_leave)(struct dsa_switch *ds, int port,
1221 struct net_device *hsr);
1222
1223 /*
1224 * MRP integration
1225 */
1226 int (*port_mrp_add)(struct dsa_switch *ds, int port,
1227 const struct switchdev_obj_mrp *mrp);
1228 int (*port_mrp_del)(struct dsa_switch *ds, int port,
1229 const struct switchdev_obj_mrp *mrp);
1230 int (*port_mrp_add_ring_role)(struct dsa_switch *ds, int port,
1231 const struct switchdev_obj_ring_role_mrp *mrp);
1232 int (*port_mrp_del_ring_role)(struct dsa_switch *ds, int port,
1233 const struct switchdev_obj_ring_role_mrp *mrp);
1234
1235 /*
1236 * tag_8021q operations
1237 */
1238 int (*tag_8021q_vlan_add)(struct dsa_switch *ds, int port, u16 vid,
1239 u16 flags);
1240 int (*tag_8021q_vlan_del)(struct dsa_switch *ds, int port, u16 vid);
1241
1242 /*
1243 * DSA conduit tracking operations
1244 */
1245 void (*conduit_state_change)(struct dsa_switch *ds,
1246 const struct net_device *conduit,
1247 bool operational);
1248 };
1249
1250 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \
1251 DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \
1252 dsa_devlink_param_get, dsa_devlink_param_set, NULL)
1253
1254 int dsa_devlink_param_get(struct devlink *dl, u32 id,
1255 struct devlink_param_gset_ctx *ctx,
1256 struct netlink_ext_ack *extack);
1257 int dsa_devlink_param_set(struct devlink *dl, u32 id,
1258 struct devlink_param_gset_ctx *ctx,
1259 struct netlink_ext_ack *extack);
1260 int dsa_devlink_params_register(struct dsa_switch *ds,
1261 const struct devlink_param *params,
1262 size_t params_count);
1263 void dsa_devlink_params_unregister(struct dsa_switch *ds,
1264 const struct devlink_param *params,
1265 size_t params_count);
1266 int dsa_devlink_resource_register(struct dsa_switch *ds,
1267 const char *resource_name,
1268 u64 resource_size,
1269 u64 resource_id,
1270 u64 parent_resource_id,
1271 const struct devlink_resource_size_params *size_params);
1272
1273 void dsa_devlink_resources_unregister(struct dsa_switch *ds);
1274
1275 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds,
1276 u64 resource_id,
1277 devlink_resource_occ_get_t *occ_get,
1278 void *occ_get_priv);
1279 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds,
1280 u64 resource_id);
1281 struct devlink_region *
1282 dsa_devlink_region_create(struct dsa_switch *ds,
1283 const struct devlink_region_ops *ops,
1284 u32 region_max_snapshots, u64 region_size);
1285 struct devlink_region *
1286 dsa_devlink_port_region_create(struct dsa_switch *ds,
1287 int port,
1288 const struct devlink_port_region_ops *ops,
1289 u32 region_max_snapshots, u64 region_size);
1290 void dsa_devlink_region_destroy(struct devlink_region *region);
1291
1292 struct dsa_port *dsa_port_from_netdev(struct net_device *netdev);
1293
1294 struct dsa_devlink_priv {
1295 struct dsa_switch *ds;
1296 };
1297
dsa_devlink_to_ds(struct devlink * dl)1298 static inline struct dsa_switch *dsa_devlink_to_ds(struct devlink *dl)
1299 {
1300 struct dsa_devlink_priv *dl_priv = devlink_priv(dl);
1301
1302 return dl_priv->ds;
1303 }
1304
1305 static inline
dsa_devlink_port_to_ds(struct devlink_port * port)1306 struct dsa_switch *dsa_devlink_port_to_ds(struct devlink_port *port)
1307 {
1308 struct devlink *dl = port->devlink;
1309 struct dsa_devlink_priv *dl_priv = devlink_priv(dl);
1310
1311 return dl_priv->ds;
1312 }
1313
dsa_devlink_port_to_port(struct devlink_port * port)1314 static inline int dsa_devlink_port_to_port(struct devlink_port *port)
1315 {
1316 return port->index;
1317 }
1318
1319 bool dsa_fdb_present_in_other_db(struct dsa_switch *ds, int port,
1320 const unsigned char *addr, u16 vid,
1321 struct dsa_db db);
1322 bool dsa_mdb_present_in_other_db(struct dsa_switch *ds, int port,
1323 const struct switchdev_obj_port_mdb *mdb,
1324 struct dsa_db db);
1325
1326 int dsa_port_simple_hsr_validate(struct dsa_switch *ds, int port,
1327 struct net_device *hsr,
1328 struct netlink_ext_ack *extack);
1329 int dsa_port_simple_hsr_join(struct dsa_switch *ds, int port,
1330 struct net_device *hsr,
1331 struct netlink_ext_ack *extack);
1332 int dsa_port_simple_hsr_leave(struct dsa_switch *ds, int port,
1333 struct net_device *hsr);
1334
1335 /* Keep inline for faster access in hot path */
netdev_uses_dsa(const struct net_device * dev)1336 static inline bool netdev_uses_dsa(const struct net_device *dev)
1337 {
1338 #if IS_ENABLED(CONFIG_NET_DSA)
1339 return dev->dsa_ptr && dev->dsa_ptr->rcv;
1340 #endif
1341 return false;
1342 }
1343
1344 /* All DSA tags that push the EtherType to the right (basically all except tail
1345 * tags, which don't break dissection) can be treated the same from the
1346 * perspective of the flow dissector.
1347 *
1348 * We need to return:
1349 * - offset: the (B - A) difference between:
1350 * A. the position of the real EtherType and
1351 * B. the current skb->data (aka ETH_HLEN bytes into the frame, aka 2 bytes
1352 * after the normal EtherType was supposed to be)
1353 * The offset in bytes is exactly equal to the tagger overhead (and half of
1354 * that, in __be16 shorts).
1355 *
1356 * - proto: the value of the real EtherType.
1357 */
dsa_tag_generic_flow_dissect(const struct sk_buff * skb,__be16 * proto,int * offset)1358 static inline void dsa_tag_generic_flow_dissect(const struct sk_buff *skb,
1359 __be16 *proto, int *offset)
1360 {
1361 #if IS_ENABLED(CONFIG_NET_DSA)
1362 const struct dsa_device_ops *ops = skb->dev->dsa_ptr->tag_ops;
1363 int tag_len = ops->needed_headroom;
1364
1365 *offset = tag_len;
1366 *proto = ((__be16 *)skb->data)[(tag_len / 2) - 1];
1367 #endif
1368 }
1369
1370 void dsa_unregister_switch(struct dsa_switch *ds);
1371 int dsa_register_switch(struct dsa_switch *ds);
1372 void dsa_switch_shutdown(struct dsa_switch *ds);
1373 struct dsa_switch *dsa_switch_find(int tree_index, int sw_index);
1374 void dsa_flush_workqueue(void);
1375 #ifdef CONFIG_PM_SLEEP
1376 int dsa_switch_suspend(struct dsa_switch *ds);
1377 int dsa_switch_resume(struct dsa_switch *ds);
1378 #else
dsa_switch_suspend(struct dsa_switch * ds)1379 static inline int dsa_switch_suspend(struct dsa_switch *ds)
1380 {
1381 return 0;
1382 }
dsa_switch_resume(struct dsa_switch * ds)1383 static inline int dsa_switch_resume(struct dsa_switch *ds)
1384 {
1385 return 0;
1386 }
1387 #endif /* CONFIG_PM_SLEEP */
1388
1389 #if IS_ENABLED(CONFIG_NET_DSA)
1390 bool dsa_user_dev_check(const struct net_device *dev);
1391 #else
dsa_user_dev_check(const struct net_device * dev)1392 static inline bool dsa_user_dev_check(const struct net_device *dev)
1393 {
1394 return false;
1395 }
1396 #endif
1397
1398 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev);
1399 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up);
1400 bool dsa_supports_eee(struct dsa_switch *ds, int port);
1401
1402 #endif
1403