Line data Source code
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 :
53 : enum dsa_tag_protocol {
54 : DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE,
55 : DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE,
56 : DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE,
57 : DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE,
58 : DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE,
59 : DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE,
60 : DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE,
61 : DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE,
62 : DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE,
63 : DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE,
64 : DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE,
65 : DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE,
66 : DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE,
67 : DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE,
68 : DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE,
69 : DSA_TAG_PROTO_OCELOT = DSA_TAG_PROTO_OCELOT_VALUE,
70 : DSA_TAG_PROTO_AR9331 = DSA_TAG_PROTO_AR9331_VALUE,
71 : DSA_TAG_PROTO_RTL4_A = DSA_TAG_PROTO_RTL4_A_VALUE,
72 : DSA_TAG_PROTO_HELLCREEK = DSA_TAG_PROTO_HELLCREEK_VALUE,
73 : DSA_TAG_PROTO_XRS700X = DSA_TAG_PROTO_XRS700X_VALUE,
74 : DSA_TAG_PROTO_OCELOT_8021Q = DSA_TAG_PROTO_OCELOT_8021Q_VALUE,
75 : DSA_TAG_PROTO_SEVILLE = DSA_TAG_PROTO_SEVILLE_VALUE,
76 : };
77 :
78 : struct packet_type;
79 : struct dsa_switch;
80 :
81 : struct dsa_device_ops {
82 : struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev);
83 : struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
84 : struct packet_type *pt);
85 : void (*flow_dissect)(const struct sk_buff *skb, __be16 *proto,
86 : int *offset);
87 : /* Used to determine which traffic should match the DSA filter in
88 : * eth_type_trans, and which, if any, should bypass it and be processed
89 : * as regular on the master net device.
90 : */
91 : bool (*filter)(const struct sk_buff *skb, struct net_device *dev);
92 : unsigned int overhead;
93 : const char *name;
94 : enum dsa_tag_protocol proto;
95 : /* Some tagging protocols either mangle or shift the destination MAC
96 : * address, in which case the DSA master would drop packets on ingress
97 : * if what it understands out of the destination MAC address is not in
98 : * its RX filter.
99 : */
100 : bool promisc_on_master;
101 : bool tail_tag;
102 : };
103 :
104 : /* This structure defines the control interfaces that are overlayed by the
105 : * DSA layer on top of the DSA CPU/management net_device instance. This is
106 : * used by the core net_device layer while calling various net_device_ops
107 : * function pointers.
108 : */
109 : struct dsa_netdevice_ops {
110 : int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr,
111 : int cmd);
112 : };
113 :
114 : #define DSA_TAG_DRIVER_ALIAS "dsa_tag-"
115 : #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \
116 : MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE))
117 :
118 : struct dsa_skb_cb {
119 : struct sk_buff *clone;
120 : };
121 :
122 : struct __dsa_skb_cb {
123 : struct dsa_skb_cb cb;
124 : u8 priv[48 - sizeof(struct dsa_skb_cb)];
125 : };
126 :
127 : #define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb))
128 :
129 : #define DSA_SKB_CB_PRIV(skb) \
130 : ((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv))
131 :
132 : struct dsa_switch_tree {
133 : struct list_head list;
134 :
135 : /* Notifier chain for switch-wide events */
136 : struct raw_notifier_head nh;
137 :
138 : /* Tree identifier */
139 : unsigned int index;
140 :
141 : /* Number of switches attached to this tree */
142 : struct kref refcount;
143 :
144 : /* Has this tree been applied to the hardware? */
145 : bool setup;
146 :
147 : /* Tagging protocol operations */
148 : const struct dsa_device_ops *tag_ops;
149 :
150 : /*
151 : * Configuration data for the platform device that owns
152 : * this dsa switch tree instance.
153 : */
154 : struct dsa_platform_data *pd;
155 :
156 : /* List of switch ports */
157 : struct list_head ports;
158 :
159 : /* List of DSA links composing the routing table */
160 : struct list_head rtable;
161 :
162 : /* Maps offloaded LAG netdevs to a zero-based linear ID for
163 : * drivers that need it.
164 : */
165 : struct net_device **lags;
166 : unsigned int lags_len;
167 : };
168 :
169 : #define dsa_lags_foreach_id(_id, _dst) \
170 : for ((_id) = 0; (_id) < (_dst)->lags_len; (_id)++) \
171 : if ((_dst)->lags[(_id)])
172 :
173 : #define dsa_lag_foreach_port(_dp, _dst, _lag) \
174 : list_for_each_entry((_dp), &(_dst)->ports, list) \
175 : if ((_dp)->lag_dev == (_lag))
176 :
177 : #define dsa_hsr_foreach_port(_dp, _ds, _hsr) \
178 : list_for_each_entry((_dp), &(_ds)->dst->ports, list) \
179 : if ((_dp)->ds == (_ds) && (_dp)->hsr_dev == (_hsr))
180 :
181 : static inline struct net_device *dsa_lag_dev(struct dsa_switch_tree *dst,
182 : unsigned int id)
183 : {
184 : return dst->lags[id];
185 : }
186 :
187 : static inline int dsa_lag_id(struct dsa_switch_tree *dst,
188 : struct net_device *lag)
189 : {
190 : unsigned int id;
191 :
192 : dsa_lags_foreach_id(id, dst) {
193 : if (dsa_lag_dev(dst, id) == lag)
194 : return id;
195 : }
196 :
197 : return -ENODEV;
198 : }
199 :
200 : /* TC matchall action types */
201 : enum dsa_port_mall_action_type {
202 : DSA_PORT_MALL_MIRROR,
203 : DSA_PORT_MALL_POLICER,
204 : };
205 :
206 : /* TC mirroring entry */
207 : struct dsa_mall_mirror_tc_entry {
208 : u8 to_local_port;
209 : bool ingress;
210 : };
211 :
212 : /* TC port policer entry */
213 : struct dsa_mall_policer_tc_entry {
214 : u32 burst;
215 : u64 rate_bytes_per_sec;
216 : };
217 :
218 : /* TC matchall entry */
219 : struct dsa_mall_tc_entry {
220 : struct list_head list;
221 : unsigned long cookie;
222 : enum dsa_port_mall_action_type type;
223 : union {
224 : struct dsa_mall_mirror_tc_entry mirror;
225 : struct dsa_mall_policer_tc_entry policer;
226 : };
227 : };
228 :
229 :
230 : struct dsa_port {
231 : /* A CPU port is physically connected to a master device.
232 : * A user port exposed to userspace has a slave device.
233 : */
234 : union {
235 : struct net_device *master;
236 : struct net_device *slave;
237 : };
238 :
239 : /* Copy of the tagging protocol operations, for quicker access
240 : * in the data path. Valid only for the CPU ports.
241 : */
242 : const struct dsa_device_ops *tag_ops;
243 :
244 : /* Copies for faster access in master receive hot path */
245 : struct dsa_switch_tree *dst;
246 : struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
247 : struct packet_type *pt);
248 : bool (*filter)(const struct sk_buff *skb, struct net_device *dev);
249 :
250 : enum {
251 : DSA_PORT_TYPE_UNUSED = 0,
252 : DSA_PORT_TYPE_CPU,
253 : DSA_PORT_TYPE_DSA,
254 : DSA_PORT_TYPE_USER,
255 : } type;
256 :
257 : struct dsa_switch *ds;
258 : unsigned int index;
259 : const char *name;
260 : struct dsa_port *cpu_dp;
261 : const char *mac;
262 : struct device_node *dn;
263 : unsigned int ageing_time;
264 : bool vlan_filtering;
265 : u8 stp_state;
266 : struct net_device *bridge_dev;
267 : struct devlink_port devlink_port;
268 : bool devlink_port_setup;
269 : struct phylink *pl;
270 : struct phylink_config pl_config;
271 : struct net_device *lag_dev;
272 : bool lag_tx_enabled;
273 : struct net_device *hsr_dev;
274 :
275 : struct list_head list;
276 :
277 : /*
278 : * Give the switch driver somewhere to hang its per-port private data
279 : * structures (accessible from the tagger).
280 : */
281 : void *priv;
282 :
283 : /*
284 : * Original copy of the master netdev ethtool_ops
285 : */
286 : const struct ethtool_ops *orig_ethtool_ops;
287 :
288 : /*
289 : * Original copy of the master netdev net_device_ops
290 : */
291 : const struct dsa_netdevice_ops *netdev_ops;
292 :
293 : bool setup;
294 : };
295 :
296 : /* TODO: ideally DSA ports would have a single dp->link_dp member,
297 : * and no dst->rtable nor this struct dsa_link would be needed,
298 : * but this would require some more complex tree walking,
299 : * so keep it stupid at the moment and list them all.
300 : */
301 : struct dsa_link {
302 : struct dsa_port *dp;
303 : struct dsa_port *link_dp;
304 : struct list_head list;
305 : };
306 :
307 : struct dsa_switch {
308 : bool setup;
309 :
310 : struct device *dev;
311 :
312 : /*
313 : * Parent switch tree, and switch index.
314 : */
315 : struct dsa_switch_tree *dst;
316 : unsigned int index;
317 :
318 : /* Listener for switch fabric events */
319 : struct notifier_block nb;
320 :
321 : /*
322 : * Give the switch driver somewhere to hang its private data
323 : * structure.
324 : */
325 : void *priv;
326 :
327 : /*
328 : * Configuration data for this switch.
329 : */
330 : struct dsa_chip_data *cd;
331 :
332 : /*
333 : * The switch operations.
334 : */
335 : const struct dsa_switch_ops *ops;
336 :
337 : /*
338 : * Slave mii_bus and devices for the individual ports.
339 : */
340 : u32 phys_mii_mask;
341 : struct mii_bus *slave_mii_bus;
342 :
343 : /* Ageing Time limits in msecs */
344 : unsigned int ageing_time_min;
345 : unsigned int ageing_time_max;
346 :
347 : /* devlink used to represent this switch device */
348 : struct devlink *devlink;
349 :
350 : /* Number of switch port queues */
351 : unsigned int num_tx_queues;
352 :
353 : /* Disallow bridge core from requesting different VLAN awareness
354 : * settings on ports if not hardware-supported
355 : */
356 : bool vlan_filtering_is_global;
357 :
358 : /* Pass .port_vlan_add and .port_vlan_del to drivers even for bridges
359 : * that have vlan_filtering=0. All drivers should ideally set this (and
360 : * then the option would get removed), but it is unknown whether this
361 : * would break things or not.
362 : */
363 : bool configure_vlan_while_not_filtering;
364 :
365 : /* If the switch driver always programs the CPU port as egress tagged
366 : * despite the VLAN configuration indicating otherwise, then setting
367 : * @untag_bridge_pvid will force the DSA receive path to pop the bridge's
368 : * default_pvid VLAN tagged frames to offer a consistent behavior
369 : * between a vlan_filtering=0 and vlan_filtering=1 bridge device.
370 : */
371 : bool untag_bridge_pvid;
372 :
373 : /* Let DSA manage the FDB entries towards the CPU, based on the
374 : * software bridge database.
375 : */
376 : bool assisted_learning_on_cpu_port;
377 :
378 : /* In case vlan_filtering_is_global is set, the VLAN awareness state
379 : * should be retrieved from here and not from the per-port settings.
380 : */
381 : bool vlan_filtering;
382 :
383 : /* MAC PCS does not provide link state change interrupt, and requires
384 : * polling. Flag passed on to PHYLINK.
385 : */
386 : bool pcs_poll;
387 :
388 : /* For switches that only have the MRU configurable. To ensure the
389 : * configured MTU is not exceeded, normalization of MRU on all bridged
390 : * interfaces is needed.
391 : */
392 : bool mtu_enforcement_ingress;
393 :
394 : /* Drivers that benefit from having an ID associated with each
395 : * offloaded LAG should set this to the maximum number of
396 : * supported IDs. DSA will then maintain a mapping of _at
397 : * least_ these many IDs, accessible to drivers via
398 : * dsa_lag_id().
399 : */
400 : unsigned int num_lag_ids;
401 :
402 : size_t num_ports;
403 : };
404 :
405 : static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
406 : {
407 : struct dsa_switch_tree *dst = ds->dst;
408 : struct dsa_port *dp;
409 :
410 : list_for_each_entry(dp, &dst->ports, list)
411 : if (dp->ds == ds && dp->index == p)
412 : return dp;
413 :
414 : return NULL;
415 : }
416 :
417 : static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p)
418 : {
419 : return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED;
420 : }
421 :
422 : static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
423 : {
424 : return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU;
425 : }
426 :
427 : static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
428 : {
429 : return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA;
430 : }
431 :
432 : static inline bool dsa_is_user_port(struct dsa_switch *ds, int p)
433 : {
434 : return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER;
435 : }
436 :
437 : static inline u32 dsa_user_ports(struct dsa_switch *ds)
438 : {
439 : u32 mask = 0;
440 : int p;
441 :
442 : for (p = 0; p < ds->num_ports; p++)
443 : if (dsa_is_user_port(ds, p))
444 : mask |= BIT(p);
445 :
446 : return mask;
447 : }
448 :
449 : /* Return the local port used to reach an arbitrary switch device */
450 : static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device)
451 : {
452 : struct dsa_switch_tree *dst = ds->dst;
453 : struct dsa_link *dl;
454 :
455 : list_for_each_entry(dl, &dst->rtable, list)
456 : if (dl->dp->ds == ds && dl->link_dp->ds->index == device)
457 : return dl->dp->index;
458 :
459 : return ds->num_ports;
460 : }
461 :
462 : /* Return the local port used to reach an arbitrary switch port */
463 : static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device,
464 : int port)
465 : {
466 : if (device == ds->index)
467 : return port;
468 : else
469 : return dsa_routing_port(ds, device);
470 : }
471 :
472 : /* Return the local port used to reach the dedicated CPU port */
473 : static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port)
474 : {
475 : const struct dsa_port *dp = dsa_to_port(ds, port);
476 : const struct dsa_port *cpu_dp = dp->cpu_dp;
477 :
478 : if (!cpu_dp)
479 : return port;
480 :
481 : return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index);
482 : }
483 :
484 : static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp)
485 : {
486 : const struct dsa_switch *ds = dp->ds;
487 :
488 : if (ds->vlan_filtering_is_global)
489 : return ds->vlan_filtering;
490 : else
491 : return dp->vlan_filtering;
492 : }
493 :
494 : typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
495 : bool is_static, void *data);
496 : struct dsa_switch_ops {
497 : /*
498 : * Tagging protocol helpers called for the CPU ports and DSA links.
499 : * @get_tag_protocol retrieves the initial tagging protocol and is
500 : * mandatory. Switches which can operate using multiple tagging
501 : * protocols should implement @change_tag_protocol and report in
502 : * @get_tag_protocol the tagger in current use.
503 : */
504 : enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds,
505 : int port,
506 : enum dsa_tag_protocol mprot);
507 : int (*change_tag_protocol)(struct dsa_switch *ds, int port,
508 : enum dsa_tag_protocol proto);
509 :
510 : int (*setup)(struct dsa_switch *ds);
511 : void (*teardown)(struct dsa_switch *ds);
512 : u32 (*get_phy_flags)(struct dsa_switch *ds, int port);
513 :
514 : /*
515 : * Access to the switch's PHY registers.
516 : */
517 : int (*phy_read)(struct dsa_switch *ds, int port, int regnum);
518 : int (*phy_write)(struct dsa_switch *ds, int port,
519 : int regnum, u16 val);
520 :
521 : /*
522 : * Link state adjustment (called from libphy)
523 : */
524 : void (*adjust_link)(struct dsa_switch *ds, int port,
525 : struct phy_device *phydev);
526 : void (*fixed_link_update)(struct dsa_switch *ds, int port,
527 : struct fixed_phy_status *st);
528 :
529 : /*
530 : * PHYLINK integration
531 : */
532 : void (*phylink_validate)(struct dsa_switch *ds, int port,
533 : unsigned long *supported,
534 : struct phylink_link_state *state);
535 : int (*phylink_mac_link_state)(struct dsa_switch *ds, int port,
536 : struct phylink_link_state *state);
537 : void (*phylink_mac_config)(struct dsa_switch *ds, int port,
538 : unsigned int mode,
539 : const struct phylink_link_state *state);
540 : void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port);
541 : void (*phylink_mac_link_down)(struct dsa_switch *ds, int port,
542 : unsigned int mode,
543 : phy_interface_t interface);
544 : void (*phylink_mac_link_up)(struct dsa_switch *ds, int port,
545 : unsigned int mode,
546 : phy_interface_t interface,
547 : struct phy_device *phydev,
548 : int speed, int duplex,
549 : bool tx_pause, bool rx_pause);
550 : void (*phylink_fixed_state)(struct dsa_switch *ds, int port,
551 : struct phylink_link_state *state);
552 : /*
553 : * Port statistics counters.
554 : */
555 : void (*get_strings)(struct dsa_switch *ds, int port,
556 : u32 stringset, uint8_t *data);
557 : void (*get_ethtool_stats)(struct dsa_switch *ds,
558 : int port, uint64_t *data);
559 : int (*get_sset_count)(struct dsa_switch *ds, int port, int sset);
560 : void (*get_ethtool_phy_stats)(struct dsa_switch *ds,
561 : int port, uint64_t *data);
562 : void (*get_stats64)(struct dsa_switch *ds, int port,
563 : struct rtnl_link_stats64 *s);
564 :
565 : /*
566 : * ethtool Wake-on-LAN
567 : */
568 : void (*get_wol)(struct dsa_switch *ds, int port,
569 : struct ethtool_wolinfo *w);
570 : int (*set_wol)(struct dsa_switch *ds, int port,
571 : struct ethtool_wolinfo *w);
572 :
573 : /*
574 : * ethtool timestamp info
575 : */
576 : int (*get_ts_info)(struct dsa_switch *ds, int port,
577 : struct ethtool_ts_info *ts);
578 :
579 : /*
580 : * Suspend and resume
581 : */
582 : int (*suspend)(struct dsa_switch *ds);
583 : int (*resume)(struct dsa_switch *ds);
584 :
585 : /*
586 : * Port enable/disable
587 : */
588 : int (*port_enable)(struct dsa_switch *ds, int port,
589 : struct phy_device *phy);
590 : void (*port_disable)(struct dsa_switch *ds, int port);
591 :
592 : /*
593 : * Port's MAC EEE settings
594 : */
595 : int (*set_mac_eee)(struct dsa_switch *ds, int port,
596 : struct ethtool_eee *e);
597 : int (*get_mac_eee)(struct dsa_switch *ds, int port,
598 : struct ethtool_eee *e);
599 :
600 : /* EEPROM access */
601 : int (*get_eeprom_len)(struct dsa_switch *ds);
602 : int (*get_eeprom)(struct dsa_switch *ds,
603 : struct ethtool_eeprom *eeprom, u8 *data);
604 : int (*set_eeprom)(struct dsa_switch *ds,
605 : struct ethtool_eeprom *eeprom, u8 *data);
606 :
607 : /*
608 : * Register access.
609 : */
610 : int (*get_regs_len)(struct dsa_switch *ds, int port);
611 : void (*get_regs)(struct dsa_switch *ds, int port,
612 : struct ethtool_regs *regs, void *p);
613 :
614 : /*
615 : * Upper device tracking.
616 : */
617 : int (*port_prechangeupper)(struct dsa_switch *ds, int port,
618 : struct netdev_notifier_changeupper_info *info);
619 :
620 : /*
621 : * Bridge integration
622 : */
623 : int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs);
624 : int (*port_bridge_join)(struct dsa_switch *ds, int port,
625 : struct net_device *bridge);
626 : void (*port_bridge_leave)(struct dsa_switch *ds, int port,
627 : struct net_device *bridge);
628 : void (*port_stp_state_set)(struct dsa_switch *ds, int port,
629 : u8 state);
630 : void (*port_fast_age)(struct dsa_switch *ds, int port);
631 : int (*port_pre_bridge_flags)(struct dsa_switch *ds, int port,
632 : struct switchdev_brport_flags flags,
633 : struct netlink_ext_ack *extack);
634 : int (*port_bridge_flags)(struct dsa_switch *ds, int port,
635 : struct switchdev_brport_flags flags,
636 : struct netlink_ext_ack *extack);
637 : int (*port_set_mrouter)(struct dsa_switch *ds, int port, bool mrouter,
638 : struct netlink_ext_ack *extack);
639 :
640 : /*
641 : * VLAN support
642 : */
643 : int (*port_vlan_filtering)(struct dsa_switch *ds, int port,
644 : bool vlan_filtering,
645 : struct netlink_ext_ack *extack);
646 : int (*port_vlan_add)(struct dsa_switch *ds, int port,
647 : const struct switchdev_obj_port_vlan *vlan,
648 : struct netlink_ext_ack *extack);
649 : int (*port_vlan_del)(struct dsa_switch *ds, int port,
650 : const struct switchdev_obj_port_vlan *vlan);
651 : /*
652 : * Forwarding database
653 : */
654 : int (*port_fdb_add)(struct dsa_switch *ds, int port,
655 : const unsigned char *addr, u16 vid);
656 : int (*port_fdb_del)(struct dsa_switch *ds, int port,
657 : const unsigned char *addr, u16 vid);
658 : int (*port_fdb_dump)(struct dsa_switch *ds, int port,
659 : dsa_fdb_dump_cb_t *cb, void *data);
660 :
661 : /*
662 : * Multicast database
663 : */
664 : int (*port_mdb_add)(struct dsa_switch *ds, int port,
665 : const struct switchdev_obj_port_mdb *mdb);
666 : int (*port_mdb_del)(struct dsa_switch *ds, int port,
667 : const struct switchdev_obj_port_mdb *mdb);
668 : /*
669 : * RXNFC
670 : */
671 : int (*get_rxnfc)(struct dsa_switch *ds, int port,
672 : struct ethtool_rxnfc *nfc, u32 *rule_locs);
673 : int (*set_rxnfc)(struct dsa_switch *ds, int port,
674 : struct ethtool_rxnfc *nfc);
675 :
676 : /*
677 : * TC integration
678 : */
679 : int (*cls_flower_add)(struct dsa_switch *ds, int port,
680 : struct flow_cls_offload *cls, bool ingress);
681 : int (*cls_flower_del)(struct dsa_switch *ds, int port,
682 : struct flow_cls_offload *cls, bool ingress);
683 : int (*cls_flower_stats)(struct dsa_switch *ds, int port,
684 : struct flow_cls_offload *cls, bool ingress);
685 : int (*port_mirror_add)(struct dsa_switch *ds, int port,
686 : struct dsa_mall_mirror_tc_entry *mirror,
687 : bool ingress);
688 : void (*port_mirror_del)(struct dsa_switch *ds, int port,
689 : struct dsa_mall_mirror_tc_entry *mirror);
690 : int (*port_policer_add)(struct dsa_switch *ds, int port,
691 : struct dsa_mall_policer_tc_entry *policer);
692 : void (*port_policer_del)(struct dsa_switch *ds, int port);
693 : int (*port_setup_tc)(struct dsa_switch *ds, int port,
694 : enum tc_setup_type type, void *type_data);
695 :
696 : /*
697 : * Cross-chip operations
698 : */
699 : int (*crosschip_bridge_join)(struct dsa_switch *ds, int tree_index,
700 : int sw_index, int port,
701 : struct net_device *br);
702 : void (*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index,
703 : int sw_index, int port,
704 : struct net_device *br);
705 : int (*crosschip_lag_change)(struct dsa_switch *ds, int sw_index,
706 : int port);
707 : int (*crosschip_lag_join)(struct dsa_switch *ds, int sw_index,
708 : int port, struct net_device *lag,
709 : struct netdev_lag_upper_info *info);
710 : int (*crosschip_lag_leave)(struct dsa_switch *ds, int sw_index,
711 : int port, struct net_device *lag);
712 :
713 : /*
714 : * PTP functionality
715 : */
716 : int (*port_hwtstamp_get)(struct dsa_switch *ds, int port,
717 : struct ifreq *ifr);
718 : int (*port_hwtstamp_set)(struct dsa_switch *ds, int port,
719 : struct ifreq *ifr);
720 : bool (*port_txtstamp)(struct dsa_switch *ds, int port,
721 : struct sk_buff *clone, unsigned int type);
722 : bool (*port_rxtstamp)(struct dsa_switch *ds, int port,
723 : struct sk_buff *skb, unsigned int type);
724 :
725 : /* Devlink parameters, etc */
726 : int (*devlink_param_get)(struct dsa_switch *ds, u32 id,
727 : struct devlink_param_gset_ctx *ctx);
728 : int (*devlink_param_set)(struct dsa_switch *ds, u32 id,
729 : struct devlink_param_gset_ctx *ctx);
730 : int (*devlink_info_get)(struct dsa_switch *ds,
731 : struct devlink_info_req *req,
732 : struct netlink_ext_ack *extack);
733 : int (*devlink_sb_pool_get)(struct dsa_switch *ds,
734 : unsigned int sb_index, u16 pool_index,
735 : struct devlink_sb_pool_info *pool_info);
736 : int (*devlink_sb_pool_set)(struct dsa_switch *ds, unsigned int sb_index,
737 : u16 pool_index, u32 size,
738 : enum devlink_sb_threshold_type threshold_type,
739 : struct netlink_ext_ack *extack);
740 : int (*devlink_sb_port_pool_get)(struct dsa_switch *ds, int port,
741 : unsigned int sb_index, u16 pool_index,
742 : u32 *p_threshold);
743 : int (*devlink_sb_port_pool_set)(struct dsa_switch *ds, int port,
744 : unsigned int sb_index, u16 pool_index,
745 : u32 threshold,
746 : struct netlink_ext_ack *extack);
747 : int (*devlink_sb_tc_pool_bind_get)(struct dsa_switch *ds, int port,
748 : unsigned int sb_index, u16 tc_index,
749 : enum devlink_sb_pool_type pool_type,
750 : u16 *p_pool_index, u32 *p_threshold);
751 : int (*devlink_sb_tc_pool_bind_set)(struct dsa_switch *ds, int port,
752 : unsigned int sb_index, u16 tc_index,
753 : enum devlink_sb_pool_type pool_type,
754 : u16 pool_index, u32 threshold,
755 : struct netlink_ext_ack *extack);
756 : int (*devlink_sb_occ_snapshot)(struct dsa_switch *ds,
757 : unsigned int sb_index);
758 : int (*devlink_sb_occ_max_clear)(struct dsa_switch *ds,
759 : unsigned int sb_index);
760 : int (*devlink_sb_occ_port_pool_get)(struct dsa_switch *ds, int port,
761 : unsigned int sb_index, u16 pool_index,
762 : u32 *p_cur, u32 *p_max);
763 : int (*devlink_sb_occ_tc_port_bind_get)(struct dsa_switch *ds, int port,
764 : unsigned int sb_index, u16 tc_index,
765 : enum devlink_sb_pool_type pool_type,
766 : u32 *p_cur, u32 *p_max);
767 :
768 : /*
769 : * MTU change functionality. Switches can also adjust their MRU through
770 : * this method. By MTU, one understands the SDU (L2 payload) length.
771 : * If the switch needs to account for the DSA tag on the CPU port, this
772 : * method needs to do so privately.
773 : */
774 : int (*port_change_mtu)(struct dsa_switch *ds, int port,
775 : int new_mtu);
776 : int (*port_max_mtu)(struct dsa_switch *ds, int port);
777 :
778 : /*
779 : * LAG integration
780 : */
781 : int (*port_lag_change)(struct dsa_switch *ds, int port);
782 : int (*port_lag_join)(struct dsa_switch *ds, int port,
783 : struct net_device *lag,
784 : struct netdev_lag_upper_info *info);
785 : int (*port_lag_leave)(struct dsa_switch *ds, int port,
786 : struct net_device *lag);
787 :
788 : /*
789 : * HSR integration
790 : */
791 : int (*port_hsr_join)(struct dsa_switch *ds, int port,
792 : struct net_device *hsr);
793 : int (*port_hsr_leave)(struct dsa_switch *ds, int port,
794 : struct net_device *hsr);
795 :
796 : /*
797 : * MRP integration
798 : */
799 : int (*port_mrp_add)(struct dsa_switch *ds, int port,
800 : const struct switchdev_obj_mrp *mrp);
801 : int (*port_mrp_del)(struct dsa_switch *ds, int port,
802 : const struct switchdev_obj_mrp *mrp);
803 : int (*port_mrp_add_ring_role)(struct dsa_switch *ds, int port,
804 : const struct switchdev_obj_ring_role_mrp *mrp);
805 : int (*port_mrp_del_ring_role)(struct dsa_switch *ds, int port,
806 : const struct switchdev_obj_ring_role_mrp *mrp);
807 : };
808 :
809 : #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \
810 : DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \
811 : dsa_devlink_param_get, dsa_devlink_param_set, NULL)
812 :
813 : int dsa_devlink_param_get(struct devlink *dl, u32 id,
814 : struct devlink_param_gset_ctx *ctx);
815 : int dsa_devlink_param_set(struct devlink *dl, u32 id,
816 : struct devlink_param_gset_ctx *ctx);
817 : int dsa_devlink_params_register(struct dsa_switch *ds,
818 : const struct devlink_param *params,
819 : size_t params_count);
820 : void dsa_devlink_params_unregister(struct dsa_switch *ds,
821 : const struct devlink_param *params,
822 : size_t params_count);
823 : int dsa_devlink_resource_register(struct dsa_switch *ds,
824 : const char *resource_name,
825 : u64 resource_size,
826 : u64 resource_id,
827 : u64 parent_resource_id,
828 : const struct devlink_resource_size_params *size_params);
829 :
830 : void dsa_devlink_resources_unregister(struct dsa_switch *ds);
831 :
832 : void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds,
833 : u64 resource_id,
834 : devlink_resource_occ_get_t *occ_get,
835 : void *occ_get_priv);
836 : void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds,
837 : u64 resource_id);
838 : struct devlink_region *
839 : dsa_devlink_region_create(struct dsa_switch *ds,
840 : const struct devlink_region_ops *ops,
841 : u32 region_max_snapshots, u64 region_size);
842 : struct devlink_region *
843 : dsa_devlink_port_region_create(struct dsa_switch *ds,
844 : int port,
845 : const struct devlink_port_region_ops *ops,
846 : u32 region_max_snapshots, u64 region_size);
847 : void dsa_devlink_region_destroy(struct devlink_region *region);
848 :
849 : struct dsa_port *dsa_port_from_netdev(struct net_device *netdev);
850 :
851 : struct dsa_devlink_priv {
852 : struct dsa_switch *ds;
853 : };
854 :
855 : static inline struct dsa_switch *dsa_devlink_to_ds(struct devlink *dl)
856 : {
857 : struct dsa_devlink_priv *dl_priv = devlink_priv(dl);
858 :
859 : return dl_priv->ds;
860 : }
861 :
862 : static inline
863 : struct dsa_switch *dsa_devlink_port_to_ds(struct devlink_port *port)
864 : {
865 : struct devlink *dl = port->devlink;
866 : struct dsa_devlink_priv *dl_priv = devlink_priv(dl);
867 :
868 : return dl_priv->ds;
869 : }
870 :
871 : static inline int dsa_devlink_port_to_port(struct devlink_port *port)
872 : {
873 : return port->index;
874 : }
875 :
876 : struct dsa_switch_driver {
877 : struct list_head list;
878 : const struct dsa_switch_ops *ops;
879 : };
880 :
881 : struct net_device *dsa_dev_to_net_device(struct device *dev);
882 :
883 : /* Keep inline for faster access in hot path */
884 723 : static inline bool netdev_uses_dsa(const struct net_device *dev)
885 : {
886 : #if IS_ENABLED(CONFIG_NET_DSA)
887 : return dev->dsa_ptr && dev->dsa_ptr->rcv;
888 : #endif
889 723 : return false;
890 : }
891 :
892 : static inline bool dsa_can_decode(const struct sk_buff *skb,
893 : struct net_device *dev)
894 : {
895 : #if IS_ENABLED(CONFIG_NET_DSA)
896 : return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev);
897 : #endif
898 : return false;
899 : }
900 :
901 : /* All DSA tags that push the EtherType to the right (basically all except tail
902 : * tags, which don't break dissection) can be treated the same from the
903 : * perspective of the flow dissector.
904 : *
905 : * We need to return:
906 : * - offset: the (B - A) difference between:
907 : * A. the position of the real EtherType and
908 : * B. the current skb->data (aka ETH_HLEN bytes into the frame, aka 2 bytes
909 : * after the normal EtherType was supposed to be)
910 : * The offset in bytes is exactly equal to the tagger overhead (and half of
911 : * that, in __be16 shorts).
912 : *
913 : * - proto: the value of the real EtherType.
914 : */
915 : static inline void dsa_tag_generic_flow_dissect(const struct sk_buff *skb,
916 : __be16 *proto, int *offset)
917 : {
918 : #if IS_ENABLED(CONFIG_NET_DSA)
919 : const struct dsa_device_ops *ops = skb->dev->dsa_ptr->tag_ops;
920 : int tag_len = ops->overhead;
921 :
922 : *offset = tag_len;
923 : *proto = ((__be16 *)skb->data)[(tag_len / 2) - 1];
924 : #endif
925 : }
926 :
927 : #if IS_ENABLED(CONFIG_NET_DSA)
928 : static inline int __dsa_netdevice_ops_check(struct net_device *dev)
929 : {
930 : int err = -EOPNOTSUPP;
931 :
932 : if (!dev->dsa_ptr)
933 : return err;
934 :
935 : if (!dev->dsa_ptr->netdev_ops)
936 : return err;
937 :
938 : return 0;
939 : }
940 :
941 : static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr,
942 : int cmd)
943 : {
944 : const struct dsa_netdevice_ops *ops;
945 : int err;
946 :
947 : err = __dsa_netdevice_ops_check(dev);
948 : if (err)
949 : return err;
950 :
951 : ops = dev->dsa_ptr->netdev_ops;
952 :
953 : return ops->ndo_do_ioctl(dev, ifr, cmd);
954 : }
955 : #else
956 0 : static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr,
957 : int cmd)
958 : {
959 0 : return -EOPNOTSUPP;
960 : }
961 : #endif
962 :
963 : void dsa_unregister_switch(struct dsa_switch *ds);
964 : int dsa_register_switch(struct dsa_switch *ds);
965 : struct dsa_switch *dsa_switch_find(int tree_index, int sw_index);
966 : #ifdef CONFIG_PM_SLEEP
967 : int dsa_switch_suspend(struct dsa_switch *ds);
968 : int dsa_switch_resume(struct dsa_switch *ds);
969 : #else
970 : static inline int dsa_switch_suspend(struct dsa_switch *ds)
971 : {
972 : return 0;
973 : }
974 : static inline int dsa_switch_resume(struct dsa_switch *ds)
975 : {
976 : return 0;
977 : }
978 : #endif /* CONFIG_PM_SLEEP */
979 :
980 : #if IS_ENABLED(CONFIG_NET_DSA)
981 : bool dsa_slave_dev_check(const struct net_device *dev);
982 : #else
983 : static inline bool dsa_slave_dev_check(const struct net_device *dev)
984 : {
985 : return false;
986 : }
987 : #endif
988 :
989 : netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev);
990 : int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data);
991 : int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data);
992 : int dsa_port_get_phy_sset_count(struct dsa_port *dp);
993 : void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up);
994 :
995 : struct dsa_tag_driver {
996 : const struct dsa_device_ops *ops;
997 : struct list_head list;
998 : struct module *owner;
999 : };
1000 :
1001 : void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[],
1002 : unsigned int count,
1003 : struct module *owner);
1004 : void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[],
1005 : unsigned int count);
1006 :
1007 : #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \
1008 : static int __init dsa_tag_driver_module_init(void) \
1009 : { \
1010 : dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \
1011 : THIS_MODULE); \
1012 : return 0; \
1013 : } \
1014 : module_init(dsa_tag_driver_module_init); \
1015 : \
1016 : static void __exit dsa_tag_driver_module_exit(void) \
1017 : { \
1018 : dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \
1019 : } \
1020 : module_exit(dsa_tag_driver_module_exit)
1021 :
1022 : /**
1023 : * module_dsa_tag_drivers() - Helper macro for registering DSA tag
1024 : * drivers
1025 : * @__ops_array: Array of tag driver strucutres
1026 : *
1027 : * Helper macro for DSA tag drivers which do not do anything special
1028 : * in module init/exit. Each module may only use this macro once, and
1029 : * calling it replaces module_init() and module_exit().
1030 : */
1031 : #define module_dsa_tag_drivers(__ops_array) \
1032 : dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array))
1033 :
1034 : #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops
1035 :
1036 : /* Create a static structure we can build a linked list of dsa_tag
1037 : * drivers
1038 : */
1039 : #define DSA_TAG_DRIVER(__ops) \
1040 : static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \
1041 : .ops = &__ops, \
1042 : }
1043 :
1044 : /**
1045 : * module_dsa_tag_driver() - Helper macro for registering a single DSA tag
1046 : * driver
1047 : * @__ops: Single tag driver structures
1048 : *
1049 : * Helper macro for DSA tag drivers which do not do anything special
1050 : * in module init/exit. Each module may only use this macro once, and
1051 : * calling it replaces module_init() and module_exit().
1052 : */
1053 : #define module_dsa_tag_driver(__ops) \
1054 : DSA_TAG_DRIVER(__ops); \
1055 : \
1056 : static struct dsa_tag_driver *dsa_tag_driver_array[] = { \
1057 : &DSA_TAG_DRIVER_NAME(__ops) \
1058 : }; \
1059 : module_dsa_tag_drivers(dsa_tag_driver_array)
1060 : #endif
1061 :
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