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 tc_action;
26 struct phy_device;
27 struct fixed_phy_status;
28 struct phylink_link_state;
29
30 #define DSA_TAG_PROTO_NONE_VALUE 0
31 #define DSA_TAG_PROTO_BRCM_VALUE 1
32 #define DSA_TAG_PROTO_BRCM_PREPEND_VALUE 2
33 #define DSA_TAG_PROTO_DSA_VALUE 3
34 #define DSA_TAG_PROTO_EDSA_VALUE 4
35 #define DSA_TAG_PROTO_GSWIP_VALUE 5
36 #define DSA_TAG_PROTO_KSZ9477_VALUE 6
37 #define DSA_TAG_PROTO_KSZ9893_VALUE 7
38 #define DSA_TAG_PROTO_LAN9303_VALUE 8
39 #define DSA_TAG_PROTO_MTK_VALUE 9
40 #define DSA_TAG_PROTO_QCA_VALUE 10
41 #define DSA_TAG_PROTO_TRAILER_VALUE 11
42 #define DSA_TAG_PROTO_8021Q_VALUE 12
43 #define DSA_TAG_PROTO_SJA1105_VALUE 13
44 #define DSA_TAG_PROTO_KSZ8795_VALUE 14
45 #define DSA_TAG_PROTO_OCELOT_VALUE 15
46 #define DSA_TAG_PROTO_AR9331_VALUE 16
47 #define DSA_TAG_PROTO_RTL4_A_VALUE 17
48 #define DSA_TAG_PROTO_HELLCREEK_VALUE 18
49 #define DSA_TAG_PROTO_XRS700X_VALUE 19
50 #define DSA_TAG_PROTO_OCELOT_8021Q_VALUE 20
51 #define DSA_TAG_PROTO_SEVILLE_VALUE 21
52 #define DSA_TAG_PROTO_BRCM_LEGACY_VALUE 22
53 #define DSA_TAG_PROTO_SJA1110_VALUE 23
54 #define DSA_TAG_PROTO_RTL8_4_VALUE 24
55 #define DSA_TAG_PROTO_RTL8_4T_VALUE 25
56 #define DSA_TAG_PROTO_RZN1_A5PSW_VALUE 26
57 #define DSA_TAG_PROTO_LAN937X_VALUE 27
58
59 enum 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_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE,
64 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE,
65 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE,
66 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE,
67 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE,
68 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE,
69 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE,
70 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE,
71 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE,
72 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE,
73 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE,
74 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE,
75 DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE,
76 DSA_TAG_PROTO_OCELOT = DSA_TAG_PROTO_OCELOT_VALUE,
77 DSA_TAG_PROTO_AR9331 = DSA_TAG_PROTO_AR9331_VALUE,
78 DSA_TAG_PROTO_RTL4_A = DSA_TAG_PROTO_RTL4_A_VALUE,
79 DSA_TAG_PROTO_HELLCREEK = DSA_TAG_PROTO_HELLCREEK_VALUE,
80 DSA_TAG_PROTO_XRS700X = DSA_TAG_PROTO_XRS700X_VALUE,
81 DSA_TAG_PROTO_OCELOT_8021Q = DSA_TAG_PROTO_OCELOT_8021Q_VALUE,
82 DSA_TAG_PROTO_SEVILLE = DSA_TAG_PROTO_SEVILLE_VALUE,
83 DSA_TAG_PROTO_SJA1110 = DSA_TAG_PROTO_SJA1110_VALUE,
84 DSA_TAG_PROTO_RTL8_4 = DSA_TAG_PROTO_RTL8_4_VALUE,
85 DSA_TAG_PROTO_RTL8_4T = DSA_TAG_PROTO_RTL8_4T_VALUE,
86 DSA_TAG_PROTO_RZN1_A5PSW = DSA_TAG_PROTO_RZN1_A5PSW_VALUE,
87 DSA_TAG_PROTO_LAN937X = DSA_TAG_PROTO_LAN937X_VALUE,
88 };
89
90 struct dsa_switch;
91
92 struct dsa_device_ops {
93 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev);
94 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev);
95 void (*flow_dissect)(const struct sk_buff *skb, __be16 *proto,
96 int *offset);
97 int (*connect)(struct dsa_switch *ds);
98 void (*disconnect)(struct dsa_switch *ds);
99 unsigned int needed_headroom;
100 unsigned int needed_tailroom;
101 const char *name;
102 enum dsa_tag_protocol proto;
103 /* Some tagging protocols either mangle or shift the destination MAC
104 * address, in which case the DSA master would drop packets on ingress
105 * if what it understands out of the destination MAC address is not in
106 * its RX filter.
107 */
108 bool promisc_on_master;
109 };
110
111 /* This structure defines the control interfaces that are overlayed by the
112 * DSA layer on top of the DSA CPU/management net_device instance. This is
113 * used by the core net_device layer while calling various net_device_ops
114 * function pointers.
115 */
116 struct dsa_netdevice_ops {
117 int (*ndo_eth_ioctl)(struct net_device *dev, struct ifreq *ifr,
118 int cmd);
119 };
120
121 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-"
122 #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \
123 MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE))
124
125 struct dsa_lag {
126 struct net_device *dev;
127 unsigned int id;
128 struct mutex fdb_lock;
129 struct list_head fdbs;
130 refcount_t refcount;
131 };
132
133 struct dsa_switch_tree {
134 struct list_head list;
135
136 /* List of switch ports */
137 struct list_head ports;
138
139 /* Notifier chain for switch-wide events */
140 struct raw_notifier_head nh;
141
142 /* Tree identifier */
143 unsigned int index;
144
145 /* Number of switches attached to this tree */
146 struct kref refcount;
147
148 /* Maps offloaded LAG netdevs to a zero-based linear ID for
149 * drivers that need it.
150 */
151 struct dsa_lag **lags;
152
153 /* Tagging protocol operations */
154 const struct dsa_device_ops *tag_ops;
155
156 /* Default tagging protocol preferred by the switches in this
157 * tree.
158 */
159 enum dsa_tag_protocol default_proto;
160
161 /* Has this tree been applied to the hardware? */
162 bool setup;
163
164 /*
165 * Configuration data for the platform device that owns
166 * this dsa switch tree instance.
167 */
168 struct dsa_platform_data *pd;
169
170 /* List of DSA links composing the routing table */
171 struct list_head rtable;
172
173 /* Length of "lags" array */
174 unsigned int lags_len;
175
176 /* Track the largest switch index within a tree */
177 unsigned int last_switch;
178 };
179
180 /* LAG IDs are one-based, the dst->lags array is zero-based */
181 #define dsa_lags_foreach_id(_id, _dst) \
182 for ((_id) = 1; (_id) <= (_dst)->lags_len; (_id)++) \
183 if ((_dst)->lags[(_id) - 1])
184
185 #define dsa_lag_foreach_port(_dp, _dst, _lag) \
186 list_for_each_entry((_dp), &(_dst)->ports, list) \
187 if (dsa_port_offloads_lag((_dp), (_lag)))
188
189 #define dsa_hsr_foreach_port(_dp, _ds, _hsr) \
190 list_for_each_entry((_dp), &(_ds)->dst->ports, list) \
191 if ((_dp)->ds == (_ds) && (_dp)->hsr_dev == (_hsr))
192
dsa_lag_by_id(struct dsa_switch_tree * dst,unsigned int id)193 static inline struct dsa_lag *dsa_lag_by_id(struct dsa_switch_tree *dst,
194 unsigned int id)
195 {
196 /* DSA LAG IDs are one-based, dst->lags is zero-based */
197 return dst->lags[id - 1];
198 }
199
dsa_lag_id(struct dsa_switch_tree * dst,struct net_device * lag_dev)200 static inline int dsa_lag_id(struct dsa_switch_tree *dst,
201 struct net_device *lag_dev)
202 {
203 unsigned int id;
204
205 dsa_lags_foreach_id(id, dst) {
206 struct dsa_lag *lag = dsa_lag_by_id(dst, id);
207
208 if (lag->dev == lag_dev)
209 return lag->id;
210 }
211
212 return -ENODEV;
213 }
214
215 /* TC matchall action types */
216 enum dsa_port_mall_action_type {
217 DSA_PORT_MALL_MIRROR,
218 DSA_PORT_MALL_POLICER,
219 };
220
221 /* TC mirroring entry */
222 struct dsa_mall_mirror_tc_entry {
223 u8 to_local_port;
224 bool ingress;
225 };
226
227 /* TC port policer entry */
228 struct dsa_mall_policer_tc_entry {
229 u32 burst;
230 u64 rate_bytes_per_sec;
231 };
232
233 /* TC matchall entry */
234 struct dsa_mall_tc_entry {
235 struct list_head list;
236 unsigned long cookie;
237 enum dsa_port_mall_action_type type;
238 union {
239 struct dsa_mall_mirror_tc_entry mirror;
240 struct dsa_mall_policer_tc_entry policer;
241 };
242 };
243
244 struct dsa_bridge {
245 struct net_device *dev;
246 unsigned int num;
247 bool tx_fwd_offload;
248 refcount_t refcount;
249 };
250
251 struct dsa_port {
252 /* A CPU port is physically connected to a master device.
253 * A user port exposed to userspace has a slave device.
254 */
255 union {
256 struct net_device *master;
257 struct net_device *slave;
258 };
259
260 /* Copy of the tagging protocol operations, for quicker access
261 * in the data path. Valid only for the CPU ports.
262 */
263 const struct dsa_device_ops *tag_ops;
264
265 /* Copies for faster access in master receive hot path */
266 struct dsa_switch_tree *dst;
267 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev);
268
269 struct dsa_switch *ds;
270
271 unsigned int index;
272
273 enum {
274 DSA_PORT_TYPE_UNUSED = 0,
275 DSA_PORT_TYPE_CPU,
276 DSA_PORT_TYPE_DSA,
277 DSA_PORT_TYPE_USER,
278 } type;
279
280 const char *name;
281 struct dsa_port *cpu_dp;
282 u8 mac[ETH_ALEN];
283
284 u8 stp_state;
285
286 /* Warning: the following bit fields are not atomic, and updating them
287 * can only be done from code paths where concurrency is not possible
288 * (probe time or under rtnl_lock).
289 */
290 u8 vlan_filtering:1;
291
292 /* Managed by DSA on user ports and by drivers on CPU and DSA ports */
293 u8 learning:1;
294
295 u8 lag_tx_enabled:1;
296
297 /* Master state bits, valid only on CPU ports */
298 u8 master_admin_up:1;
299 u8 master_oper_up:1;
300
301 /* Valid only on user ports */
302 u8 cpu_port_in_lag:1;
303
304 u8 setup:1;
305
306 struct device_node *dn;
307 unsigned int ageing_time;
308
309 struct dsa_bridge *bridge;
310 struct devlink_port devlink_port;
311 struct phylink *pl;
312 struct phylink_config pl_config;
313 struct dsa_lag *lag;
314 struct net_device *hsr_dev;
315
316 struct list_head list;
317
318 /*
319 * Original copy of the master netdev ethtool_ops
320 */
321 const struct ethtool_ops *orig_ethtool_ops;
322
323 /*
324 * Original copy of the master netdev net_device_ops
325 */
326 const struct dsa_netdevice_ops *netdev_ops;
327
328 /* List of MAC addresses that must be forwarded on this port.
329 * These are only valid on CPU ports and DSA links.
330 */
331 struct mutex addr_lists_lock;
332 struct list_head fdbs;
333 struct list_head mdbs;
334
335 /* List of VLANs that CPU and DSA ports are members of. */
336 struct mutex vlans_lock;
337 struct list_head vlans;
338 };
339
340 /* TODO: ideally DSA ports would have a single dp->link_dp member,
341 * and no dst->rtable nor this struct dsa_link would be needed,
342 * but this would require some more complex tree walking,
343 * so keep it stupid at the moment and list them all.
344 */
345 struct dsa_link {
346 struct dsa_port *dp;
347 struct dsa_port *link_dp;
348 struct list_head list;
349 };
350
351 enum dsa_db_type {
352 DSA_DB_PORT,
353 DSA_DB_LAG,
354 DSA_DB_BRIDGE,
355 };
356
357 struct dsa_db {
358 enum dsa_db_type type;
359
360 union {
361 const struct dsa_port *dp;
362 struct dsa_lag lag;
363 struct dsa_bridge bridge;
364 };
365 };
366
367 struct dsa_mac_addr {
368 unsigned char addr[ETH_ALEN];
369 u16 vid;
370 refcount_t refcount;
371 struct list_head list;
372 struct dsa_db db;
373 };
374
375 struct dsa_vlan {
376 u16 vid;
377 refcount_t refcount;
378 struct list_head list;
379 };
380
381 struct dsa_switch {
382 struct device *dev;
383
384 /*
385 * Parent switch tree, and switch index.
386 */
387 struct dsa_switch_tree *dst;
388 unsigned int index;
389
390 /* Warning: the following bit fields are not atomic, and updating them
391 * can only be done from code paths where concurrency is not possible
392 * (probe time or under rtnl_lock).
393 */
394 u32 setup:1;
395
396 /* Disallow bridge core from requesting different VLAN awareness
397 * settings on ports if not hardware-supported
398 */
399 u32 vlan_filtering_is_global:1;
400
401 /* Keep VLAN filtering enabled on ports not offloading any upper */
402 u32 needs_standalone_vlan_filtering:1;
403
404 /* Pass .port_vlan_add and .port_vlan_del to drivers even for bridges
405 * that have vlan_filtering=0. All drivers should ideally set this (and
406 * then the option would get removed), but it is unknown whether this
407 * would break things or not.
408 */
409 u32 configure_vlan_while_not_filtering:1;
410
411 /* If the switch driver always programs the CPU port as egress tagged
412 * despite the VLAN configuration indicating otherwise, then setting
413 * @untag_bridge_pvid will force the DSA receive path to pop the
414 * bridge's default_pvid VLAN tagged frames to offer a consistent
415 * behavior between a vlan_filtering=0 and vlan_filtering=1 bridge
416 * device.
417 */
418 u32 untag_bridge_pvid:1;
419
420 /* Let DSA manage the FDB entries towards the
421 * CPU, based on the software bridge database.
422 */
423 u32 assisted_learning_on_cpu_port:1;
424
425 /* In case vlan_filtering_is_global is set, the VLAN awareness state
426 * should be retrieved from here and not from the per-port settings.
427 */
428 u32 vlan_filtering:1;
429
430 /* For switches that only have the MRU configurable. To ensure the
431 * configured MTU is not exceeded, normalization of MRU on all bridged
432 * interfaces is needed.
433 */
434 u32 mtu_enforcement_ingress:1;
435
436 /* Drivers that isolate the FDBs of multiple bridges must set this
437 * to true to receive the bridge as an argument in .port_fdb_{add,del}
438 * and .port_mdb_{add,del}. Otherwise, the bridge.num will always be
439 * passed as zero.
440 */
441 u32 fdb_isolation:1;
442
443 /* Listener for switch fabric events */
444 struct notifier_block nb;
445
446 /*
447 * Give the switch driver somewhere to hang its private data
448 * structure.
449 */
450 void *priv;
451
452 void *tagger_data;
453
454 /*
455 * Configuration data for this switch.
456 */
457 struct dsa_chip_data *cd;
458
459 /*
460 * The switch operations.
461 */
462 const struct dsa_switch_ops *ops;
463
464 /*
465 * Slave mii_bus and devices for the individual ports.
466 */
467 u32 phys_mii_mask;
468 struct mii_bus *slave_mii_bus;
469
470 /* Ageing Time limits in msecs */
471 unsigned int ageing_time_min;
472 unsigned int ageing_time_max;
473
474 /* Storage for drivers using tag_8021q */
475 struct dsa_8021q_context *tag_8021q_ctx;
476
477 /* devlink used to represent this switch device */
478 struct devlink *devlink;
479
480 /* Number of switch port queues */
481 unsigned int num_tx_queues;
482
483 /* Drivers that benefit from having an ID associated with each
484 * offloaded LAG should set this to the maximum number of
485 * supported IDs. DSA will then maintain a mapping of _at
486 * least_ these many IDs, accessible to drivers via
487 * dsa_lag_id().
488 */
489 unsigned int num_lag_ids;
490
491 /* Drivers that support bridge forwarding offload or FDB isolation
492 * should set this to the maximum number of bridges spanning the same
493 * switch tree (or all trees, in the case of cross-tree bridging
494 * support) that can be offloaded.
495 */
496 unsigned int max_num_bridges;
497
498 unsigned int num_ports;
499 };
500
dsa_to_port(struct dsa_switch * ds,int p)501 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
502 {
503 struct dsa_switch_tree *dst = ds->dst;
504 struct dsa_port *dp;
505
506 list_for_each_entry(dp, &dst->ports, list)
507 if (dp->ds == ds && dp->index == p)
508 return dp;
509
510 return NULL;
511 }
512
dsa_port_is_dsa(struct dsa_port * port)513 static inline bool dsa_port_is_dsa(struct dsa_port *port)
514 {
515 return port->type == DSA_PORT_TYPE_DSA;
516 }
517
dsa_port_is_cpu(struct dsa_port * port)518 static inline bool dsa_port_is_cpu(struct dsa_port *port)
519 {
520 return port->type == DSA_PORT_TYPE_CPU;
521 }
522
dsa_port_is_user(struct dsa_port * dp)523 static inline bool dsa_port_is_user(struct dsa_port *dp)
524 {
525 return dp->type == DSA_PORT_TYPE_USER;
526 }
527
dsa_port_is_unused(struct dsa_port * dp)528 static inline bool dsa_port_is_unused(struct dsa_port *dp)
529 {
530 return dp->type == DSA_PORT_TYPE_UNUSED;
531 }
532
dsa_port_master_is_operational(struct dsa_port * dp)533 static inline bool dsa_port_master_is_operational(struct dsa_port *dp)
534 {
535 return dsa_port_is_cpu(dp) && dp->master_admin_up &&
536 dp->master_oper_up;
537 }
538
dsa_is_unused_port(struct dsa_switch * ds,int p)539 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p)
540 {
541 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED;
542 }
543
dsa_is_cpu_port(struct dsa_switch * ds,int p)544 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
545 {
546 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU;
547 }
548
dsa_is_dsa_port(struct dsa_switch * ds,int p)549 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
550 {
551 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA;
552 }
553
dsa_is_user_port(struct dsa_switch * ds,int p)554 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p)
555 {
556 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER;
557 }
558
559 #define dsa_tree_for_each_user_port(_dp, _dst) \
560 list_for_each_entry((_dp), &(_dst)->ports, list) \
561 if (dsa_port_is_user((_dp)))
562
563 #define dsa_tree_for_each_user_port_continue_reverse(_dp, _dst) \
564 list_for_each_entry_continue_reverse((_dp), &(_dst)->ports, list) \
565 if (dsa_port_is_user((_dp)))
566
567 #define dsa_tree_for_each_cpu_port(_dp, _dst) \
568 list_for_each_entry((_dp), &(_dst)->ports, list) \
569 if (dsa_port_is_cpu((_dp)))
570
571 #define dsa_switch_for_each_port(_dp, _ds) \
572 list_for_each_entry((_dp), &(_ds)->dst->ports, list) \
573 if ((_dp)->ds == (_ds))
574
575 #define dsa_switch_for_each_port_safe(_dp, _next, _ds) \
576 list_for_each_entry_safe((_dp), (_next), &(_ds)->dst->ports, list) \
577 if ((_dp)->ds == (_ds))
578
579 #define dsa_switch_for_each_port_continue_reverse(_dp, _ds) \
580 list_for_each_entry_continue_reverse((_dp), &(_ds)->dst->ports, list) \
581 if ((_dp)->ds == (_ds))
582
583 #define dsa_switch_for_each_available_port(_dp, _ds) \
584 dsa_switch_for_each_port((_dp), (_ds)) \
585 if (!dsa_port_is_unused((_dp)))
586
587 #define dsa_switch_for_each_user_port(_dp, _ds) \
588 dsa_switch_for_each_port((_dp), (_ds)) \
589 if (dsa_port_is_user((_dp)))
590
591 #define dsa_switch_for_each_cpu_port(_dp, _ds) \
592 dsa_switch_for_each_port((_dp), (_ds)) \
593 if (dsa_port_is_cpu((_dp)))
594
595 #define dsa_switch_for_each_cpu_port_continue_reverse(_dp, _ds) \
596 dsa_switch_for_each_port_continue_reverse((_dp), (_ds)) \
597 if (dsa_port_is_cpu((_dp)))
598
dsa_user_ports(struct dsa_switch * ds)599 static inline u32 dsa_user_ports(struct dsa_switch *ds)
600 {
601 struct dsa_port *dp;
602 u32 mask = 0;
603
604 dsa_switch_for_each_user_port(dp, ds)
605 mask |= BIT(dp->index);
606
607 return mask;
608 }
609
dsa_cpu_ports(struct dsa_switch * ds)610 static inline u32 dsa_cpu_ports(struct dsa_switch *ds)
611 {
612 struct dsa_port *cpu_dp;
613 u32 mask = 0;
614
615 dsa_switch_for_each_cpu_port(cpu_dp, ds)
616 mask |= BIT(cpu_dp->index);
617
618 return mask;
619 }
620
621 /* Return the local port used to reach an arbitrary switch device */
dsa_routing_port(struct dsa_switch * ds,int device)622 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device)
623 {
624 struct dsa_switch_tree *dst = ds->dst;
625 struct dsa_link *dl;
626
627 list_for_each_entry(dl, &dst->rtable, list)
628 if (dl->dp->ds == ds && dl->link_dp->ds->index == device)
629 return dl->dp->index;
630
631 return ds->num_ports;
632 }
633
634 /* Return the local port used to reach an arbitrary switch port */
dsa_towards_port(struct dsa_switch * ds,int device,int port)635 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device,
636 int port)
637 {
638 if (device == ds->index)
639 return port;
640 else
641 return dsa_routing_port(ds, device);
642 }
643
644 /* Return the local port used to reach the dedicated CPU port */
dsa_upstream_port(struct dsa_switch * ds,int port)645 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port)
646 {
647 const struct dsa_port *dp = dsa_to_port(ds, port);
648 const struct dsa_port *cpu_dp = dp->cpu_dp;
649
650 if (!cpu_dp)
651 return port;
652
653 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index);
654 }
655
656 /* Return true if this is the local port used to reach the CPU port */
dsa_is_upstream_port(struct dsa_switch * ds,int port)657 static inline bool dsa_is_upstream_port(struct dsa_switch *ds, int port)
658 {
659 if (dsa_is_unused_port(ds, port))
660 return false;
661
662 return port == dsa_upstream_port(ds, port);
663 }
664
665 /* Return true if this is a DSA port leading away from the CPU */
dsa_is_downstream_port(struct dsa_switch * ds,int port)666 static inline bool dsa_is_downstream_port(struct dsa_switch *ds, int port)
667 {
668 return dsa_is_dsa_port(ds, port) && !dsa_is_upstream_port(ds, port);
669 }
670
671 /* Return the local port used to reach the CPU port */
dsa_switch_upstream_port(struct dsa_switch * ds)672 static inline unsigned int dsa_switch_upstream_port(struct dsa_switch *ds)
673 {
674 struct dsa_port *dp;
675
676 dsa_switch_for_each_available_port(dp, ds) {
677 return dsa_upstream_port(ds, dp->index);
678 }
679
680 return ds->num_ports;
681 }
682
683 /* Return true if @upstream_ds is an upstream switch of @downstream_ds, meaning
684 * that the routing port from @downstream_ds to @upstream_ds is also the port
685 * which @downstream_ds uses to reach its dedicated CPU.
686 */
dsa_switch_is_upstream_of(struct dsa_switch * upstream_ds,struct dsa_switch * downstream_ds)687 static inline bool dsa_switch_is_upstream_of(struct dsa_switch *upstream_ds,
688 struct dsa_switch *downstream_ds)
689 {
690 int routing_port;
691
692 if (upstream_ds == downstream_ds)
693 return true;
694
695 routing_port = dsa_routing_port(downstream_ds, upstream_ds->index);
696
697 return dsa_is_upstream_port(downstream_ds, routing_port);
698 }
699
dsa_port_is_vlan_filtering(const struct dsa_port * dp)700 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp)
701 {
702 const struct dsa_switch *ds = dp->ds;
703
704 if (ds->vlan_filtering_is_global)
705 return ds->vlan_filtering;
706 else
707 return dp->vlan_filtering;
708 }
709
dsa_port_lag_id_get(struct dsa_port * dp)710 static inline unsigned int dsa_port_lag_id_get(struct dsa_port *dp)
711 {
712 return dp->lag ? dp->lag->id : 0;
713 }
714
dsa_port_lag_dev_get(struct dsa_port * dp)715 static inline struct net_device *dsa_port_lag_dev_get(struct dsa_port *dp)
716 {
717 return dp->lag ? dp->lag->dev : NULL;
718 }
719
dsa_port_offloads_lag(struct dsa_port * dp,const struct dsa_lag * lag)720 static inline bool dsa_port_offloads_lag(struct dsa_port *dp,
721 const struct dsa_lag *lag)
722 {
723 return dsa_port_lag_dev_get(dp) == lag->dev;
724 }
725
dsa_port_to_master(const struct dsa_port * dp)726 static inline struct net_device *dsa_port_to_master(const struct dsa_port *dp)
727 {
728 if (dp->cpu_port_in_lag)
729 return dsa_port_lag_dev_get(dp->cpu_dp);
730
731 return dp->cpu_dp->master;
732 }
733
734 static inline
dsa_port_to_bridge_port(const struct dsa_port * dp)735 struct net_device *dsa_port_to_bridge_port(const struct dsa_port *dp)
736 {
737 if (!dp->bridge)
738 return NULL;
739
740 if (dp->lag)
741 return dp->lag->dev;
742 else if (dp->hsr_dev)
743 return dp->hsr_dev;
744
745 return dp->slave;
746 }
747
748 static inline struct net_device *
dsa_port_bridge_dev_get(const struct dsa_port * dp)749 dsa_port_bridge_dev_get(const struct dsa_port *dp)
750 {
751 return dp->bridge ? dp->bridge->dev : NULL;
752 }
753
dsa_port_bridge_num_get(struct dsa_port * dp)754 static inline unsigned int dsa_port_bridge_num_get(struct dsa_port *dp)
755 {
756 return dp->bridge ? dp->bridge->num : 0;
757 }
758
dsa_port_bridge_same(const struct dsa_port * a,const struct dsa_port * b)759 static inline bool dsa_port_bridge_same(const struct dsa_port *a,
760 const struct dsa_port *b)
761 {
762 struct net_device *br_a = dsa_port_bridge_dev_get(a);
763 struct net_device *br_b = dsa_port_bridge_dev_get(b);
764
765 /* Standalone ports are not in the same bridge with one another */
766 return (!br_a || !br_b) ? false : (br_a == br_b);
767 }
768
dsa_port_offloads_bridge_port(struct dsa_port * dp,const struct net_device * dev)769 static inline bool dsa_port_offloads_bridge_port(struct dsa_port *dp,
770 const struct net_device *dev)
771 {
772 return dsa_port_to_bridge_port(dp) == dev;
773 }
774
775 static inline bool
dsa_port_offloads_bridge_dev(struct dsa_port * dp,const struct net_device * bridge_dev)776 dsa_port_offloads_bridge_dev(struct dsa_port *dp,
777 const struct net_device *bridge_dev)
778 {
779 /* DSA ports connected to a bridge, and event was emitted
780 * for the bridge.
781 */
782 return dsa_port_bridge_dev_get(dp) == bridge_dev;
783 }
784
dsa_port_offloads_bridge(struct dsa_port * dp,const struct dsa_bridge * bridge)785 static inline bool dsa_port_offloads_bridge(struct dsa_port *dp,
786 const struct dsa_bridge *bridge)
787 {
788 return dsa_port_bridge_dev_get(dp) == bridge->dev;
789 }
790
791 /* 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)792 static inline bool dsa_tree_offloads_bridge_port(struct dsa_switch_tree *dst,
793 const struct net_device *dev)
794 {
795 struct dsa_port *dp;
796
797 list_for_each_entry(dp, &dst->ports, list)
798 if (dsa_port_offloads_bridge_port(dp, dev))
799 return true;
800
801 return false;
802 }
803
804 /* Returns true if any port of this tree offloads the given bridge */
805 static inline bool
dsa_tree_offloads_bridge_dev(struct dsa_switch_tree * dst,const struct net_device * bridge_dev)806 dsa_tree_offloads_bridge_dev(struct dsa_switch_tree *dst,
807 const struct net_device *bridge_dev)
808 {
809 struct dsa_port *dp;
810
811 list_for_each_entry(dp, &dst->ports, list)
812 if (dsa_port_offloads_bridge_dev(dp, bridge_dev))
813 return true;
814
815 return false;
816 }
817
dsa_port_tree_same(const struct dsa_port * a,const struct dsa_port * b)818 static inline bool dsa_port_tree_same(const struct dsa_port *a,
819 const struct dsa_port *b)
820 {
821 return a->ds->dst == b->ds->dst;
822 }
823
824 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
825 bool is_static, void *data);
826 struct dsa_switch_ops {
827 /*
828 * Tagging protocol helpers called for the CPU ports and DSA links.
829 * @get_tag_protocol retrieves the initial tagging protocol and is
830 * mandatory. Switches which can operate using multiple tagging
831 * protocols should implement @change_tag_protocol and report in
832 * @get_tag_protocol the tagger in current use.
833 */
834 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds,
835 int port,
836 enum dsa_tag_protocol mprot);
837 int (*change_tag_protocol)(struct dsa_switch *ds,
838 enum dsa_tag_protocol proto);
839 /*
840 * Method for switch drivers to connect to the tagging protocol driver
841 * in current use. The switch driver can provide handlers for certain
842 * types of packets for switch management.
843 */
844 int (*connect_tag_protocol)(struct dsa_switch *ds,
845 enum dsa_tag_protocol proto);
846
847 int (*port_change_master)(struct dsa_switch *ds, int port,
848 struct net_device *master,
849 struct netlink_ext_ack *extack);
850
851 /* Optional switch-wide initialization and destruction methods */
852 int (*setup)(struct dsa_switch *ds);
853 void (*teardown)(struct dsa_switch *ds);
854
855 /* Per-port initialization and destruction methods. Mandatory if the
856 * driver registers devlink port regions, optional otherwise.
857 */
858 int (*port_setup)(struct dsa_switch *ds, int port);
859 void (*port_teardown)(struct dsa_switch *ds, int port);
860
861 u32 (*get_phy_flags)(struct dsa_switch *ds, int port);
862
863 /*
864 * Access to the switch's PHY registers.
865 */
866 int (*phy_read)(struct dsa_switch *ds, int port, int regnum);
867 int (*phy_write)(struct dsa_switch *ds, int port,
868 int regnum, u16 val);
869
870 /*
871 * Link state adjustment (called from libphy)
872 */
873 void (*adjust_link)(struct dsa_switch *ds, int port,
874 struct phy_device *phydev);
875 void (*fixed_link_update)(struct dsa_switch *ds, int port,
876 struct fixed_phy_status *st);
877
878 /*
879 * PHYLINK integration
880 */
881 void (*phylink_get_caps)(struct dsa_switch *ds, int port,
882 struct phylink_config *config);
883 void (*phylink_validate)(struct dsa_switch *ds, int port,
884 unsigned long *supported,
885 struct phylink_link_state *state);
886 struct phylink_pcs *(*phylink_mac_select_pcs)(struct dsa_switch *ds,
887 int port,
888 phy_interface_t iface);
889 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port,
890 struct phylink_link_state *state);
891 void (*phylink_mac_config)(struct dsa_switch *ds, int port,
892 unsigned int mode,
893 const struct phylink_link_state *state);
894 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port);
895 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port,
896 unsigned int mode,
897 phy_interface_t interface);
898 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port,
899 unsigned int mode,
900 phy_interface_t interface,
901 struct phy_device *phydev,
902 int speed, int duplex,
903 bool tx_pause, bool rx_pause);
904 void (*phylink_fixed_state)(struct dsa_switch *ds, int port,
905 struct phylink_link_state *state);
906 /*
907 * Port statistics counters.
908 */
909 void (*get_strings)(struct dsa_switch *ds, int port,
910 u32 stringset, uint8_t *data);
911 void (*get_ethtool_stats)(struct dsa_switch *ds,
912 int port, uint64_t *data);
913 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset);
914 void (*get_ethtool_phy_stats)(struct dsa_switch *ds,
915 int port, uint64_t *data);
916 void (*get_eth_phy_stats)(struct dsa_switch *ds, int port,
917 struct ethtool_eth_phy_stats *phy_stats);
918 void (*get_eth_mac_stats)(struct dsa_switch *ds, int port,
919 struct ethtool_eth_mac_stats *mac_stats);
920 void (*get_eth_ctrl_stats)(struct dsa_switch *ds, int port,
921 struct ethtool_eth_ctrl_stats *ctrl_stats);
922 void (*get_rmon_stats)(struct dsa_switch *ds, int port,
923 struct ethtool_rmon_stats *rmon_stats,
924 const struct ethtool_rmon_hist_range **ranges);
925 void (*get_stats64)(struct dsa_switch *ds, int port,
926 struct rtnl_link_stats64 *s);
927 void (*get_pause_stats)(struct dsa_switch *ds, int port,
928 struct ethtool_pause_stats *pause_stats);
929 void (*self_test)(struct dsa_switch *ds, int port,
930 struct ethtool_test *etest, u64 *data);
931
932 /*
933 * ethtool Wake-on-LAN
934 */
935 void (*get_wol)(struct dsa_switch *ds, int port,
936 struct ethtool_wolinfo *w);
937 int (*set_wol)(struct dsa_switch *ds, int port,
938 struct ethtool_wolinfo *w);
939
940 /*
941 * ethtool timestamp info
942 */
943 int (*get_ts_info)(struct dsa_switch *ds, int port,
944 struct ethtool_ts_info *ts);
945
946 /*
947 * DCB ops
948 */
949 int (*port_get_default_prio)(struct dsa_switch *ds, int port);
950 int (*port_set_default_prio)(struct dsa_switch *ds, int port,
951 u8 prio);
952 int (*port_get_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp);
953 int (*port_add_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp,
954 u8 prio);
955 int (*port_del_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp,
956 u8 prio);
957
958 /*
959 * Suspend and resume
960 */
961 int (*suspend)(struct dsa_switch *ds);
962 int (*resume)(struct dsa_switch *ds);
963
964 /*
965 * Port enable/disable
966 */
967 int (*port_enable)(struct dsa_switch *ds, int port,
968 struct phy_device *phy);
969 void (*port_disable)(struct dsa_switch *ds, int port);
970
971 /*
972 * Port's MAC EEE settings
973 */
974 int (*set_mac_eee)(struct dsa_switch *ds, int port,
975 struct ethtool_eee *e);
976 int (*get_mac_eee)(struct dsa_switch *ds, int port,
977 struct ethtool_eee *e);
978
979 /* EEPROM access */
980 int (*get_eeprom_len)(struct dsa_switch *ds);
981 int (*get_eeprom)(struct dsa_switch *ds,
982 struct ethtool_eeprom *eeprom, u8 *data);
983 int (*set_eeprom)(struct dsa_switch *ds,
984 struct ethtool_eeprom *eeprom, u8 *data);
985
986 /*
987 * Register access.
988 */
989 int (*get_regs_len)(struct dsa_switch *ds, int port);
990 void (*get_regs)(struct dsa_switch *ds, int port,
991 struct ethtool_regs *regs, void *p);
992
993 /*
994 * Upper device tracking.
995 */
996 int (*port_prechangeupper)(struct dsa_switch *ds, int port,
997 struct netdev_notifier_changeupper_info *info);
998
999 /*
1000 * Bridge integration
1001 */
1002 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs);
1003 int (*port_bridge_join)(struct dsa_switch *ds, int port,
1004 struct dsa_bridge bridge,
1005 bool *tx_fwd_offload,
1006 struct netlink_ext_ack *extack);
1007 void (*port_bridge_leave)(struct dsa_switch *ds, int port,
1008 struct dsa_bridge bridge);
1009 void (*port_stp_state_set)(struct dsa_switch *ds, int port,
1010 u8 state);
1011 int (*port_mst_state_set)(struct dsa_switch *ds, int port,
1012 const struct switchdev_mst_state *state);
1013 void (*port_fast_age)(struct dsa_switch *ds, int port);
1014 int (*port_vlan_fast_age)(struct dsa_switch *ds, int port, u16 vid);
1015 int (*port_pre_bridge_flags)(struct dsa_switch *ds, int port,
1016 struct switchdev_brport_flags flags,
1017 struct netlink_ext_ack *extack);
1018 int (*port_bridge_flags)(struct dsa_switch *ds, int port,
1019 struct switchdev_brport_flags flags,
1020 struct netlink_ext_ack *extack);
1021 void (*port_set_host_flood)(struct dsa_switch *ds, int port,
1022 bool uc, bool mc);
1023
1024 /*
1025 * VLAN support
1026 */
1027 int (*port_vlan_filtering)(struct dsa_switch *ds, int port,
1028 bool vlan_filtering,
1029 struct netlink_ext_ack *extack);
1030 int (*port_vlan_add)(struct dsa_switch *ds, int port,
1031 const struct switchdev_obj_port_vlan *vlan,
1032 struct netlink_ext_ack *extack);
1033 int (*port_vlan_del)(struct dsa_switch *ds, int port,
1034 const struct switchdev_obj_port_vlan *vlan);
1035 int (*vlan_msti_set)(struct dsa_switch *ds, struct dsa_bridge bridge,
1036 const struct switchdev_vlan_msti *msti);
1037
1038 /*
1039 * Forwarding database
1040 */
1041 int (*port_fdb_add)(struct dsa_switch *ds, int port,
1042 const unsigned char *addr, u16 vid,
1043 struct dsa_db db);
1044 int (*port_fdb_del)(struct dsa_switch *ds, int port,
1045 const unsigned char *addr, u16 vid,
1046 struct dsa_db db);
1047 int (*port_fdb_dump)(struct dsa_switch *ds, int port,
1048 dsa_fdb_dump_cb_t *cb, void *data);
1049 int (*lag_fdb_add)(struct dsa_switch *ds, struct dsa_lag lag,
1050 const unsigned char *addr, u16 vid,
1051 struct dsa_db db);
1052 int (*lag_fdb_del)(struct dsa_switch *ds, struct dsa_lag lag,
1053 const unsigned char *addr, u16 vid,
1054 struct dsa_db db);
1055
1056 /*
1057 * Multicast database
1058 */
1059 int (*port_mdb_add)(struct dsa_switch *ds, int port,
1060 const struct switchdev_obj_port_mdb *mdb,
1061 struct dsa_db db);
1062 int (*port_mdb_del)(struct dsa_switch *ds, int port,
1063 const struct switchdev_obj_port_mdb *mdb,
1064 struct dsa_db db);
1065 /*
1066 * RXNFC
1067 */
1068 int (*get_rxnfc)(struct dsa_switch *ds, int port,
1069 struct ethtool_rxnfc *nfc, u32 *rule_locs);
1070 int (*set_rxnfc)(struct dsa_switch *ds, int port,
1071 struct ethtool_rxnfc *nfc);
1072
1073 /*
1074 * TC integration
1075 */
1076 int (*cls_flower_add)(struct dsa_switch *ds, int port,
1077 struct flow_cls_offload *cls, bool ingress);
1078 int (*cls_flower_del)(struct dsa_switch *ds, int port,
1079 struct flow_cls_offload *cls, bool ingress);
1080 int (*cls_flower_stats)(struct dsa_switch *ds, int port,
1081 struct flow_cls_offload *cls, bool ingress);
1082 int (*port_mirror_add)(struct dsa_switch *ds, int port,
1083 struct dsa_mall_mirror_tc_entry *mirror,
1084 bool ingress, struct netlink_ext_ack *extack);
1085 void (*port_mirror_del)(struct dsa_switch *ds, int port,
1086 struct dsa_mall_mirror_tc_entry *mirror);
1087 int (*port_policer_add)(struct dsa_switch *ds, int port,
1088 struct dsa_mall_policer_tc_entry *policer);
1089 void (*port_policer_del)(struct dsa_switch *ds, int port);
1090 int (*port_setup_tc)(struct dsa_switch *ds, int port,
1091 enum tc_setup_type type, void *type_data);
1092
1093 /*
1094 * Cross-chip operations
1095 */
1096 int (*crosschip_bridge_join)(struct dsa_switch *ds, int tree_index,
1097 int sw_index, int port,
1098 struct dsa_bridge bridge,
1099 struct netlink_ext_ack *extack);
1100 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index,
1101 int sw_index, int port,
1102 struct dsa_bridge bridge);
1103 int (*crosschip_lag_change)(struct dsa_switch *ds, int sw_index,
1104 int port);
1105 int (*crosschip_lag_join)(struct dsa_switch *ds, int sw_index,
1106 int port, struct dsa_lag lag,
1107 struct netdev_lag_upper_info *info,
1108 struct netlink_ext_ack *extack);
1109 int (*crosschip_lag_leave)(struct dsa_switch *ds, int sw_index,
1110 int port, struct dsa_lag lag);
1111
1112 /*
1113 * PTP functionality
1114 */
1115 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port,
1116 struct ifreq *ifr);
1117 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port,
1118 struct ifreq *ifr);
1119 void (*port_txtstamp)(struct dsa_switch *ds, int port,
1120 struct sk_buff *skb);
1121 bool (*port_rxtstamp)(struct dsa_switch *ds, int port,
1122 struct sk_buff *skb, unsigned int type);
1123
1124 /* Devlink parameters, etc */
1125 int (*devlink_param_get)(struct dsa_switch *ds, u32 id,
1126 struct devlink_param_gset_ctx *ctx);
1127 int (*devlink_param_set)(struct dsa_switch *ds, u32 id,
1128 struct devlink_param_gset_ctx *ctx);
1129 int (*devlink_info_get)(struct dsa_switch *ds,
1130 struct devlink_info_req *req,
1131 struct netlink_ext_ack *extack);
1132 int (*devlink_sb_pool_get)(struct dsa_switch *ds,
1133 unsigned int sb_index, u16 pool_index,
1134 struct devlink_sb_pool_info *pool_info);
1135 int (*devlink_sb_pool_set)(struct dsa_switch *ds, unsigned int sb_index,
1136 u16 pool_index, u32 size,
1137 enum devlink_sb_threshold_type threshold_type,
1138 struct netlink_ext_ack *extack);
1139 int (*devlink_sb_port_pool_get)(struct dsa_switch *ds, int port,
1140 unsigned int sb_index, u16 pool_index,
1141 u32 *p_threshold);
1142 int (*devlink_sb_port_pool_set)(struct dsa_switch *ds, int port,
1143 unsigned int sb_index, u16 pool_index,
1144 u32 threshold,
1145 struct netlink_ext_ack *extack);
1146 int (*devlink_sb_tc_pool_bind_get)(struct dsa_switch *ds, int port,
1147 unsigned int sb_index, u16 tc_index,
1148 enum devlink_sb_pool_type pool_type,
1149 u16 *p_pool_index, u32 *p_threshold);
1150 int (*devlink_sb_tc_pool_bind_set)(struct dsa_switch *ds, int port,
1151 unsigned int sb_index, u16 tc_index,
1152 enum devlink_sb_pool_type pool_type,
1153 u16 pool_index, u32 threshold,
1154 struct netlink_ext_ack *extack);
1155 int (*devlink_sb_occ_snapshot)(struct dsa_switch *ds,
1156 unsigned int sb_index);
1157 int (*devlink_sb_occ_max_clear)(struct dsa_switch *ds,
1158 unsigned int sb_index);
1159 int (*devlink_sb_occ_port_pool_get)(struct dsa_switch *ds, int port,
1160 unsigned int sb_index, u16 pool_index,
1161 u32 *p_cur, u32 *p_max);
1162 int (*devlink_sb_occ_tc_port_bind_get)(struct dsa_switch *ds, int port,
1163 unsigned int sb_index, u16 tc_index,
1164 enum devlink_sb_pool_type pool_type,
1165 u32 *p_cur, u32 *p_max);
1166
1167 /*
1168 * MTU change functionality. Switches can also adjust their MRU through
1169 * this method. By MTU, one understands the SDU (L2 payload) length.
1170 * If the switch needs to account for the DSA tag on the CPU port, this
1171 * method needs to do so privately.
1172 */
1173 int (*port_change_mtu)(struct dsa_switch *ds, int port,
1174 int new_mtu);
1175 int (*port_max_mtu)(struct dsa_switch *ds, int port);
1176
1177 /*
1178 * LAG integration
1179 */
1180 int (*port_lag_change)(struct dsa_switch *ds, int port);
1181 int (*port_lag_join)(struct dsa_switch *ds, int port,
1182 struct dsa_lag lag,
1183 struct netdev_lag_upper_info *info,
1184 struct netlink_ext_ack *extack);
1185 int (*port_lag_leave)(struct dsa_switch *ds, int port,
1186 struct dsa_lag lag);
1187
1188 /*
1189 * HSR integration
1190 */
1191 int (*port_hsr_join)(struct dsa_switch *ds, int port,
1192 struct net_device *hsr);
1193 int (*port_hsr_leave)(struct dsa_switch *ds, int port,
1194 struct net_device *hsr);
1195
1196 /*
1197 * MRP integration
1198 */
1199 int (*port_mrp_add)(struct dsa_switch *ds, int port,
1200 const struct switchdev_obj_mrp *mrp);
1201 int (*port_mrp_del)(struct dsa_switch *ds, int port,
1202 const struct switchdev_obj_mrp *mrp);
1203 int (*port_mrp_add_ring_role)(struct dsa_switch *ds, int port,
1204 const struct switchdev_obj_ring_role_mrp *mrp);
1205 int (*port_mrp_del_ring_role)(struct dsa_switch *ds, int port,
1206 const struct switchdev_obj_ring_role_mrp *mrp);
1207
1208 /*
1209 * tag_8021q operations
1210 */
1211 int (*tag_8021q_vlan_add)(struct dsa_switch *ds, int port, u16 vid,
1212 u16 flags);
1213 int (*tag_8021q_vlan_del)(struct dsa_switch *ds, int port, u16 vid);
1214
1215 /*
1216 * DSA master tracking operations
1217 */
1218 void (*master_state_change)(struct dsa_switch *ds,
1219 const struct net_device *master,
1220 bool operational);
1221 };
1222
1223 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \
1224 DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \
1225 dsa_devlink_param_get, dsa_devlink_param_set, NULL)
1226
1227 int dsa_devlink_param_get(struct devlink *dl, u32 id,
1228 struct devlink_param_gset_ctx *ctx);
1229 int dsa_devlink_param_set(struct devlink *dl, u32 id,
1230 struct devlink_param_gset_ctx *ctx);
1231 int dsa_devlink_params_register(struct dsa_switch *ds,
1232 const struct devlink_param *params,
1233 size_t params_count);
1234 void dsa_devlink_params_unregister(struct dsa_switch *ds,
1235 const struct devlink_param *params,
1236 size_t params_count);
1237 int dsa_devlink_resource_register(struct dsa_switch *ds,
1238 const char *resource_name,
1239 u64 resource_size,
1240 u64 resource_id,
1241 u64 parent_resource_id,
1242 const struct devlink_resource_size_params *size_params);
1243
1244 void dsa_devlink_resources_unregister(struct dsa_switch *ds);
1245
1246 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds,
1247 u64 resource_id,
1248 devlink_resource_occ_get_t *occ_get,
1249 void *occ_get_priv);
1250 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds,
1251 u64 resource_id);
1252 struct devlink_region *
1253 dsa_devlink_region_create(struct dsa_switch *ds,
1254 const struct devlink_region_ops *ops,
1255 u32 region_max_snapshots, u64 region_size);
1256 struct devlink_region *
1257 dsa_devlink_port_region_create(struct dsa_switch *ds,
1258 int port,
1259 const struct devlink_port_region_ops *ops,
1260 u32 region_max_snapshots, u64 region_size);
1261 void dsa_devlink_region_destroy(struct devlink_region *region);
1262
1263 struct dsa_port *dsa_port_from_netdev(struct net_device *netdev);
1264
1265 struct dsa_devlink_priv {
1266 struct dsa_switch *ds;
1267 };
1268
dsa_devlink_to_ds(struct devlink * dl)1269 static inline struct dsa_switch *dsa_devlink_to_ds(struct devlink *dl)
1270 {
1271 struct dsa_devlink_priv *dl_priv = devlink_priv(dl);
1272
1273 return dl_priv->ds;
1274 }
1275
1276 static inline
dsa_devlink_port_to_ds(struct devlink_port * port)1277 struct dsa_switch *dsa_devlink_port_to_ds(struct devlink_port *port)
1278 {
1279 struct devlink *dl = port->devlink;
1280 struct dsa_devlink_priv *dl_priv = devlink_priv(dl);
1281
1282 return dl_priv->ds;
1283 }
1284
dsa_devlink_port_to_port(struct devlink_port * port)1285 static inline int dsa_devlink_port_to_port(struct devlink_port *port)
1286 {
1287 return port->index;
1288 }
1289
1290 struct dsa_switch_driver {
1291 struct list_head list;
1292 const struct dsa_switch_ops *ops;
1293 };
1294
1295 struct net_device *dsa_dev_to_net_device(struct device *dev);
1296
1297 bool dsa_fdb_present_in_other_db(struct dsa_switch *ds, int port,
1298 const unsigned char *addr, u16 vid,
1299 struct dsa_db db);
1300 bool dsa_mdb_present_in_other_db(struct dsa_switch *ds, int port,
1301 const struct switchdev_obj_port_mdb *mdb,
1302 struct dsa_db db);
1303
1304 /* Keep inline for faster access in hot path */
netdev_uses_dsa(const struct net_device * dev)1305 static inline bool netdev_uses_dsa(const struct net_device *dev)
1306 {
1307 #if IS_ENABLED(CONFIG_NET_DSA)
1308 return dev->dsa_ptr && dev->dsa_ptr->rcv;
1309 #endif
1310 return false;
1311 }
1312
1313 /* All DSA tags that push the EtherType to the right (basically all except tail
1314 * tags, which don't break dissection) can be treated the same from the
1315 * perspective of the flow dissector.
1316 *
1317 * We need to return:
1318 * - offset: the (B - A) difference between:
1319 * A. the position of the real EtherType and
1320 * B. the current skb->data (aka ETH_HLEN bytes into the frame, aka 2 bytes
1321 * after the normal EtherType was supposed to be)
1322 * The offset in bytes is exactly equal to the tagger overhead (and half of
1323 * that, in __be16 shorts).
1324 *
1325 * - proto: the value of the real EtherType.
1326 */
dsa_tag_generic_flow_dissect(const struct sk_buff * skb,__be16 * proto,int * offset)1327 static inline void dsa_tag_generic_flow_dissect(const struct sk_buff *skb,
1328 __be16 *proto, int *offset)
1329 {
1330 #if IS_ENABLED(CONFIG_NET_DSA)
1331 const struct dsa_device_ops *ops = skb->dev->dsa_ptr->tag_ops;
1332 int tag_len = ops->needed_headroom;
1333
1334 *offset = tag_len;
1335 *proto = ((__be16 *)skb->data)[(tag_len / 2) - 1];
1336 #endif
1337 }
1338
1339 #if IS_ENABLED(CONFIG_NET_DSA)
__dsa_netdevice_ops_check(struct net_device * dev)1340 static inline int __dsa_netdevice_ops_check(struct net_device *dev)
1341 {
1342 int err = -EOPNOTSUPP;
1343
1344 if (!dev->dsa_ptr)
1345 return err;
1346
1347 if (!dev->dsa_ptr->netdev_ops)
1348 return err;
1349
1350 return 0;
1351 }
1352
dsa_ndo_eth_ioctl(struct net_device * dev,struct ifreq * ifr,int cmd)1353 static inline int dsa_ndo_eth_ioctl(struct net_device *dev, struct ifreq *ifr,
1354 int cmd)
1355 {
1356 const struct dsa_netdevice_ops *ops;
1357 int err;
1358
1359 err = __dsa_netdevice_ops_check(dev);
1360 if (err)
1361 return err;
1362
1363 ops = dev->dsa_ptr->netdev_ops;
1364
1365 return ops->ndo_eth_ioctl(dev, ifr, cmd);
1366 }
1367 #else
dsa_ndo_eth_ioctl(struct net_device * dev,struct ifreq * ifr,int cmd)1368 static inline int dsa_ndo_eth_ioctl(struct net_device *dev, struct ifreq *ifr,
1369 int cmd)
1370 {
1371 return -EOPNOTSUPP;
1372 }
1373 #endif
1374
1375 void dsa_unregister_switch(struct dsa_switch *ds);
1376 int dsa_register_switch(struct dsa_switch *ds);
1377 void dsa_switch_shutdown(struct dsa_switch *ds);
1378 struct dsa_switch *dsa_switch_find(int tree_index, int sw_index);
1379 void dsa_flush_workqueue(void);
1380 #ifdef CONFIG_PM_SLEEP
1381 int dsa_switch_suspend(struct dsa_switch *ds);
1382 int dsa_switch_resume(struct dsa_switch *ds);
1383 #else
dsa_switch_suspend(struct dsa_switch * ds)1384 static inline int dsa_switch_suspend(struct dsa_switch *ds)
1385 {
1386 return 0;
1387 }
dsa_switch_resume(struct dsa_switch * ds)1388 static inline int dsa_switch_resume(struct dsa_switch *ds)
1389 {
1390 return 0;
1391 }
1392 #endif /* CONFIG_PM_SLEEP */
1393
1394 #if IS_ENABLED(CONFIG_NET_DSA)
1395 bool dsa_slave_dev_check(const struct net_device *dev);
1396 #else
dsa_slave_dev_check(const struct net_device * dev)1397 static inline bool dsa_slave_dev_check(const struct net_device *dev)
1398 {
1399 return false;
1400 }
1401 #endif
1402
1403 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev);
1404 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up);
1405
1406 struct dsa_tag_driver {
1407 const struct dsa_device_ops *ops;
1408 struct list_head list;
1409 struct module *owner;
1410 };
1411
1412 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[],
1413 unsigned int count,
1414 struct module *owner);
1415 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[],
1416 unsigned int count);
1417
1418 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \
1419 static int __init dsa_tag_driver_module_init(void) \
1420 { \
1421 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \
1422 THIS_MODULE); \
1423 return 0; \
1424 } \
1425 module_init(dsa_tag_driver_module_init); \
1426 \
1427 static void __exit dsa_tag_driver_module_exit(void) \
1428 { \
1429 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \
1430 } \
1431 module_exit(dsa_tag_driver_module_exit)
1432
1433 /**
1434 * module_dsa_tag_drivers() - Helper macro for registering DSA tag
1435 * drivers
1436 * @__ops_array: Array of tag driver structures
1437 *
1438 * Helper macro for DSA tag drivers which do not do anything special
1439 * in module init/exit. Each module may only use this macro once, and
1440 * calling it replaces module_init() and module_exit().
1441 */
1442 #define module_dsa_tag_drivers(__ops_array) \
1443 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array))
1444
1445 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops
1446
1447 /* Create a static structure we can build a linked list of dsa_tag
1448 * drivers
1449 */
1450 #define DSA_TAG_DRIVER(__ops) \
1451 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \
1452 .ops = &__ops, \
1453 }
1454
1455 /**
1456 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag
1457 * driver
1458 * @__ops: Single tag driver structures
1459 *
1460 * Helper macro for DSA tag drivers which do not do anything special
1461 * in module init/exit. Each module may only use this macro once, and
1462 * calling it replaces module_init() and module_exit().
1463 */
1464 #define module_dsa_tag_driver(__ops) \
1465 DSA_TAG_DRIVER(__ops); \
1466 \
1467 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \
1468 &DSA_TAG_DRIVER_NAME(__ops) \
1469 }; \
1470 module_dsa_tag_drivers(dsa_tag_driver_array)
1471 #endif
1472
1473