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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips
4 * Copyright (c) 2008-2009 Marvell Semiconductor
5 */
6
7#ifndef __LINUX_NET_DSA_H
8#define __LINUX_NET_DSA_H
9
10#include <linux/if.h>
11#include <linux/if_ether.h>
12#include <linux/list.h>
13#include <linux/notifier.h>
14#include <linux/timer.h>
15#include <linux/workqueue.h>
16#include <linux/of.h>
17#include <linux/ethtool.h>
18#include <linux/net_tstamp.h>
19#include <linux/phy.h>
20#include <linux/platform_data/dsa.h>
21#include <linux/phylink.h>
22#include <net/devlink.h>
23#include <net/switchdev.h>
24
25struct tc_action;
26struct phy_device;
27struct fixed_phy_status;
28struct 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
46enum dsa_tag_protocol {
47 DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE,
48 DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE,
49 DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE,
50 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE,
51 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE,
52 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE,
53 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE,
54 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE,
55 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE,
56 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE,
57 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE,
58 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE,
59 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE,
60 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE,
61 DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE,
62};
63
64struct packet_type;
65struct dsa_switch;
66
67struct dsa_device_ops {
68 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev);
69 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
70 struct packet_type *pt);
71 int (*flow_dissect)(const struct sk_buff *skb, __be16 *proto,
72 int *offset);
73 /* Used to determine which traffic should match the DSA filter in
74 * eth_type_trans, and which, if any, should bypass it and be processed
75 * as regular on the master net device.
76 */
77 bool (*filter)(const struct sk_buff *skb, struct net_device *dev);
78 unsigned int overhead;
79 const char *name;
80 enum dsa_tag_protocol proto;
81};
82
83#define DSA_TAG_DRIVER_ALIAS "dsa_tag-"
84#define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \
85 MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE))
86
87struct dsa_skb_cb {
88 struct sk_buff *clone;
89 bool deferred_xmit;
90};
91
92struct __dsa_skb_cb {
93 struct dsa_skb_cb cb;
94 u8 priv[48 - sizeof(struct dsa_skb_cb)];
95};
96
97#define __DSA_SKB_CB(skb) ((struct __dsa_skb_cb *)((skb)->cb))
98
99#define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb))
100
101#define DSA_SKB_CB_PRIV(skb) \
102 ((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv))
103
104struct dsa_switch_tree {
105 struct list_head list;
106
107 /* Notifier chain for switch-wide events */
108 struct raw_notifier_head nh;
109
110 /* Tree identifier */
111 unsigned int index;
112
113 /* Number of switches attached to this tree */
114 struct kref refcount;
115
116 /* Has this tree been applied to the hardware? */
117 bool setup;
118
119 /*
120 * Configuration data for the platform device that owns
121 * this dsa switch tree instance.
122 */
123 struct dsa_platform_data *pd;
124
125 /*
126 * The switch port to which the CPU is attached.
127 */
128 struct dsa_port *cpu_dp;
129
130 /*
131 * Data for the individual switch chips.
132 */
133 struct dsa_switch *ds[DSA_MAX_SWITCHES];
134};
135
136/* TC matchall action types, only mirroring for now */
137enum dsa_port_mall_action_type {
138 DSA_PORT_MALL_MIRROR,
139};
140
141/* TC mirroring entry */
142struct dsa_mall_mirror_tc_entry {
143 u8 to_local_port;
144 bool ingress;
145};
146
147/* TC matchall entry */
148struct dsa_mall_tc_entry {
149 struct list_head list;
150 unsigned long cookie;
151 enum dsa_port_mall_action_type type;
152 union {
153 struct dsa_mall_mirror_tc_entry mirror;
154 };
155};
156
157
158struct dsa_port {
159 /* A CPU port is physically connected to a master device.
160 * A user port exposed to userspace has a slave device.
161 */
162 union {
163 struct net_device *master;
164 struct net_device *slave;
165 };
166
167 /* CPU port tagging operations used by master or slave devices */
168 const struct dsa_device_ops *tag_ops;
169
170 /* Copies for faster access in master receive hot path */
171 struct dsa_switch_tree *dst;
172 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
173 struct packet_type *pt);
174 bool (*filter)(const struct sk_buff *skb, struct net_device *dev);
175
176 enum {
177 DSA_PORT_TYPE_UNUSED = 0,
178 DSA_PORT_TYPE_CPU,
179 DSA_PORT_TYPE_DSA,
180 DSA_PORT_TYPE_USER,
181 } type;
182
183 struct dsa_switch *ds;
184 unsigned int index;
185 const char *name;
186 struct dsa_port *cpu_dp;
187 const char *mac;
188 struct device_node *dn;
189 unsigned int ageing_time;
190 bool vlan_filtering;
191 u8 stp_state;
192 struct net_device *bridge_dev;
193 struct devlink_port devlink_port;
194 struct phylink *pl;
195 struct phylink_config pl_config;
196
197 struct work_struct xmit_work;
198 struct sk_buff_head xmit_queue;
199
200 /*
201 * Give the switch driver somewhere to hang its per-port private data
202 * structures (accessible from the tagger).
203 */
204 void *priv;
205
206 /*
207 * Original copy of the master netdev ethtool_ops
208 */
209 const struct ethtool_ops *orig_ethtool_ops;
210
211 /*
212 * Original copy of the master netdev net_device_ops
213 */
214 const struct net_device_ops *orig_ndo_ops;
215};
216
217struct dsa_switch {
218 struct device *dev;
219
220 /*
221 * Parent switch tree, and switch index.
222 */
223 struct dsa_switch_tree *dst;
224 unsigned int index;
225
226 /* Listener for switch fabric events */
227 struct notifier_block nb;
228
229 /*
230 * Give the switch driver somewhere to hang its private data
231 * structure.
232 */
233 void *priv;
234
235 /*
236 * Configuration data for this switch.
237 */
238 struct dsa_chip_data *cd;
239
240 /*
241 * The switch operations.
242 */
243 const struct dsa_switch_ops *ops;
244
245 /*
246 * An array of which element [a] indicates which port on this
247 * switch should be used to send packets to that are destined
248 * for switch a. Can be NULL if there is only one switch chip.
249 */
250 s8 rtable[DSA_MAX_SWITCHES];
251
252 /*
253 * Slave mii_bus and devices for the individual ports.
254 */
255 u32 phys_mii_mask;
256 struct mii_bus *slave_mii_bus;
257
258 /* Ageing Time limits in msecs */
259 unsigned int ageing_time_min;
260 unsigned int ageing_time_max;
261
262 /* devlink used to represent this switch device */
263 struct devlink *devlink;
264
265 /* Number of switch port queues */
266 unsigned int num_tx_queues;
267
268 /* Disallow bridge core from requesting different VLAN awareness
269 * settings on ports if not hardware-supported
270 */
271 bool vlan_filtering_is_global;
272
273 /* In case vlan_filtering_is_global is set, the VLAN awareness state
274 * should be retrieved from here and not from the per-port settings.
275 */
276 bool vlan_filtering;
277
278 /* Dynamically allocated ports, keep last */
279 size_t num_ports;
280 struct dsa_port ports[];
281};
282
283static inline const struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
284{
285 return &ds->ports[p];
286}
287
288static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p)
289{
290 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED;
291}
292
293static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
294{
295 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU;
296}
297
298static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
299{
300 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA;
301}
302
303static inline bool dsa_is_user_port(struct dsa_switch *ds, int p)
304{
305 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER;
306}
307
308static inline u32 dsa_user_ports(struct dsa_switch *ds)
309{
310 u32 mask = 0;
311 int p;
312
313 for (p = 0; p < ds->num_ports; p++)
314 if (dsa_is_user_port(ds, p))
315 mask |= BIT(p);
316
317 return mask;
318}
319
320/* Return the local port used to reach an arbitrary switch port */
321static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device,
322 int port)
323{
324 if (device == ds->index)
325 return port;
326 else
327 return ds->rtable[device];
328}
329
330/* Return the local port used to reach the dedicated CPU port */
331static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port)
332{
333 const struct dsa_port *dp = dsa_to_port(ds, port);
334 const struct dsa_port *cpu_dp = dp->cpu_dp;
335
336 if (!cpu_dp)
337 return port;
338
339 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index);
340}
341
342static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp)
343{
344 const struct dsa_switch *ds = dp->ds;
345
346 if (ds->vlan_filtering_is_global)
347 return ds->vlan_filtering;
348 else
349 return dp->vlan_filtering;
350}
351
352typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
353 bool is_static, void *data);
354struct dsa_switch_ops {
355 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds,
356 int port);
357
358 int (*setup)(struct dsa_switch *ds);
359 void (*teardown)(struct dsa_switch *ds);
360 u32 (*get_phy_flags)(struct dsa_switch *ds, int port);
361
362 /*
363 * Access to the switch's PHY registers.
364 */
365 int (*phy_read)(struct dsa_switch *ds, int port, int regnum);
366 int (*phy_write)(struct dsa_switch *ds, int port,
367 int regnum, u16 val);
368
369 /*
370 * Link state adjustment (called from libphy)
371 */
372 void (*adjust_link)(struct dsa_switch *ds, int port,
373 struct phy_device *phydev);
374 void (*fixed_link_update)(struct dsa_switch *ds, int port,
375 struct fixed_phy_status *st);
376
377 /*
378 * PHYLINK integration
379 */
380 void (*phylink_validate)(struct dsa_switch *ds, int port,
381 unsigned long *supported,
382 struct phylink_link_state *state);
383 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port,
384 struct phylink_link_state *state);
385 void (*phylink_mac_config)(struct dsa_switch *ds, int port,
386 unsigned int mode,
387 const struct phylink_link_state *state);
388 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port);
389 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port,
390 unsigned int mode,
391 phy_interface_t interface);
392 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port,
393 unsigned int mode,
394 phy_interface_t interface,
395 struct phy_device *phydev);
396 void (*phylink_fixed_state)(struct dsa_switch *ds, int port,
397 struct phylink_link_state *state);
398 /*
399 * ethtool hardware statistics.
400 */
401 void (*get_strings)(struct dsa_switch *ds, int port,
402 u32 stringset, uint8_t *data);
403 void (*get_ethtool_stats)(struct dsa_switch *ds,
404 int port, uint64_t *data);
405 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset);
406 void (*get_ethtool_phy_stats)(struct dsa_switch *ds,
407 int port, uint64_t *data);
408
409 /*
410 * ethtool Wake-on-LAN
411 */
412 void (*get_wol)(struct dsa_switch *ds, int port,
413 struct ethtool_wolinfo *w);
414 int (*set_wol)(struct dsa_switch *ds, int port,
415 struct ethtool_wolinfo *w);
416
417 /*
418 * ethtool timestamp info
419 */
420 int (*get_ts_info)(struct dsa_switch *ds, int port,
421 struct ethtool_ts_info *ts);
422
423 /*
424 * Suspend and resume
425 */
426 int (*suspend)(struct dsa_switch *ds);
427 int (*resume)(struct dsa_switch *ds);
428
429 /*
430 * Port enable/disable
431 */
432 int (*port_enable)(struct dsa_switch *ds, int port,
433 struct phy_device *phy);
434 void (*port_disable)(struct dsa_switch *ds, int port);
435
436 /*
437 * Port's MAC EEE settings
438 */
439 int (*set_mac_eee)(struct dsa_switch *ds, int port,
440 struct ethtool_eee *e);
441 int (*get_mac_eee)(struct dsa_switch *ds, int port,
442 struct ethtool_eee *e);
443
444 /* EEPROM access */
445 int (*get_eeprom_len)(struct dsa_switch *ds);
446 int (*get_eeprom)(struct dsa_switch *ds,
447 struct ethtool_eeprom *eeprom, u8 *data);
448 int (*set_eeprom)(struct dsa_switch *ds,
449 struct ethtool_eeprom *eeprom, u8 *data);
450
451 /*
452 * Register access.
453 */
454 int (*get_regs_len)(struct dsa_switch *ds, int port);
455 void (*get_regs)(struct dsa_switch *ds, int port,
456 struct ethtool_regs *regs, void *p);
457
458 /*
459 * Bridge integration
460 */
461 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs);
462 int (*port_bridge_join)(struct dsa_switch *ds, int port,
463 struct net_device *bridge);
464 void (*port_bridge_leave)(struct dsa_switch *ds, int port,
465 struct net_device *bridge);
466 void (*port_stp_state_set)(struct dsa_switch *ds, int port,
467 u8 state);
468 void (*port_fast_age)(struct dsa_switch *ds, int port);
469 int (*port_egress_floods)(struct dsa_switch *ds, int port,
470 bool unicast, bool multicast);
471
472 /*
473 * VLAN support
474 */
475 int (*port_vlan_filtering)(struct dsa_switch *ds, int port,
476 bool vlan_filtering);
477 int (*port_vlan_prepare)(struct dsa_switch *ds, int port,
478 const struct switchdev_obj_port_vlan *vlan);
479 void (*port_vlan_add)(struct dsa_switch *ds, int port,
480 const struct switchdev_obj_port_vlan *vlan);
481 int (*port_vlan_del)(struct dsa_switch *ds, int port,
482 const struct switchdev_obj_port_vlan *vlan);
483 /*
484 * Forwarding database
485 */
486 int (*port_fdb_add)(struct dsa_switch *ds, int port,
487 const unsigned char *addr, u16 vid);
488 int (*port_fdb_del)(struct dsa_switch *ds, int port,
489 const unsigned char *addr, u16 vid);
490 int (*port_fdb_dump)(struct dsa_switch *ds, int port,
491 dsa_fdb_dump_cb_t *cb, void *data);
492
493 /*
494 * Multicast database
495 */
496 int (*port_mdb_prepare)(struct dsa_switch *ds, int port,
497 const struct switchdev_obj_port_mdb *mdb);
498 void (*port_mdb_add)(struct dsa_switch *ds, int port,
499 const struct switchdev_obj_port_mdb *mdb);
500 int (*port_mdb_del)(struct dsa_switch *ds, int port,
501 const struct switchdev_obj_port_mdb *mdb);
502 /*
503 * RXNFC
504 */
505 int (*get_rxnfc)(struct dsa_switch *ds, int port,
506 struct ethtool_rxnfc *nfc, u32 *rule_locs);
507 int (*set_rxnfc)(struct dsa_switch *ds, int port,
508 struct ethtool_rxnfc *nfc);
509
510 /*
511 * TC integration
512 */
513 int (*port_mirror_add)(struct dsa_switch *ds, int port,
514 struct dsa_mall_mirror_tc_entry *mirror,
515 bool ingress);
516 void (*port_mirror_del)(struct dsa_switch *ds, int port,
517 struct dsa_mall_mirror_tc_entry *mirror);
518 int (*port_setup_tc)(struct dsa_switch *ds, int port,
519 enum tc_setup_type type, void *type_data);
520
521 /*
522 * Cross-chip operations
523 */
524 int (*crosschip_bridge_join)(struct dsa_switch *ds, int sw_index,
525 int port, struct net_device *br);
526 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int sw_index,
527 int port, struct net_device *br);
528
529 /*
530 * PTP functionality
531 */
532 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port,
533 struct ifreq *ifr);
534 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port,
535 struct ifreq *ifr);
536 bool (*port_txtstamp)(struct dsa_switch *ds, int port,
537 struct sk_buff *clone, unsigned int type);
538 bool (*port_rxtstamp)(struct dsa_switch *ds, int port,
539 struct sk_buff *skb, unsigned int type);
540
541 /*
542 * Deferred frame Tx
543 */
544 netdev_tx_t (*port_deferred_xmit)(struct dsa_switch *ds, int port,
545 struct sk_buff *skb);
546};
547
548struct dsa_switch_driver {
549 struct list_head list;
550 const struct dsa_switch_ops *ops;
551};
552
553struct net_device *dsa_dev_to_net_device(struct device *dev);
554
555/* Keep inline for faster access in hot path */
556static inline bool netdev_uses_dsa(struct net_device *dev)
557{
558#if IS_ENABLED(CONFIG_NET_DSA)
559 return dev->dsa_ptr && dev->dsa_ptr->rcv;
560#endif
561 return false;
562}
563
564static inline bool dsa_can_decode(const struct sk_buff *skb,
565 struct net_device *dev)
566{
567#if IS_ENABLED(CONFIG_NET_DSA)
568 return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev);
569#endif
570 return false;
571}
572
573struct dsa_switch *dsa_switch_alloc(struct device *dev, size_t n);
574void dsa_unregister_switch(struct dsa_switch *ds);
575int dsa_register_switch(struct dsa_switch *ds);
576#ifdef CONFIG_PM_SLEEP
577int dsa_switch_suspend(struct dsa_switch *ds);
578int dsa_switch_resume(struct dsa_switch *ds);
579#else
580static inline int dsa_switch_suspend(struct dsa_switch *ds)
581{
582 return 0;
583}
584static inline int dsa_switch_resume(struct dsa_switch *ds)
585{
586 return 0;
587}
588#endif /* CONFIG_PM_SLEEP */
589
590enum dsa_notifier_type {
591 DSA_PORT_REGISTER,
592 DSA_PORT_UNREGISTER,
593};
594
595struct dsa_notifier_info {
596 struct net_device *dev;
597};
598
599struct dsa_notifier_register_info {
600 struct dsa_notifier_info info; /* must be first */
601 struct net_device *master;
602 unsigned int port_number;
603 unsigned int switch_number;
604};
605
606static inline struct net_device *
607dsa_notifier_info_to_dev(const struct dsa_notifier_info *info)
608{
609 return info->dev;
610}
611
612#if IS_ENABLED(CONFIG_NET_DSA)
613int register_dsa_notifier(struct notifier_block *nb);
614int unregister_dsa_notifier(struct notifier_block *nb);
615int call_dsa_notifiers(unsigned long val, struct net_device *dev,
616 struct dsa_notifier_info *info);
617#else
618static inline int register_dsa_notifier(struct notifier_block *nb)
619{
620 return 0;
621}
622
623static inline int unregister_dsa_notifier(struct notifier_block *nb)
624{
625 return 0;
626}
627
628static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev,
629 struct dsa_notifier_info *info)
630{
631 return NOTIFY_DONE;
632}
633#endif
634
635/* Broadcom tag specific helpers to insert and extract queue/port number */
636#define BRCM_TAG_SET_PORT_QUEUE(p, q) ((p) << 8 | q)
637#define BRCM_TAG_GET_PORT(v) ((v) >> 8)
638#define BRCM_TAG_GET_QUEUE(v) ((v) & 0xff)
639
640
641netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev);
642int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data);
643int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data);
644int dsa_port_get_phy_sset_count(struct dsa_port *dp);
645void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up);
646
647struct dsa_tag_driver {
648 const struct dsa_device_ops *ops;
649 struct list_head list;
650 struct module *owner;
651};
652
653void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[],
654 unsigned int count,
655 struct module *owner);
656void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[],
657 unsigned int count);
658
659#define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \
660static int __init dsa_tag_driver_module_init(void) \
661{ \
662 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \
663 THIS_MODULE); \
664 return 0; \
665} \
666module_init(dsa_tag_driver_module_init); \
667 \
668static void __exit dsa_tag_driver_module_exit(void) \
669{ \
670 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \
671} \
672module_exit(dsa_tag_driver_module_exit)
673
674/**
675 * module_dsa_tag_drivers() - Helper macro for registering DSA tag
676 * drivers
677 * @__ops_array: Array of tag driver strucutres
678 *
679 * Helper macro for DSA tag drivers which do not do anything special
680 * in module init/exit. Each module may only use this macro once, and
681 * calling it replaces module_init() and module_exit().
682 */
683#define module_dsa_tag_drivers(__ops_array) \
684dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array))
685
686#define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops
687
688/* Create a static structure we can build a linked list of dsa_tag
689 * drivers
690 */
691#define DSA_TAG_DRIVER(__ops) \
692static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \
693 .ops = &__ops, \
694}
695
696/**
697 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag
698 * driver
699 * @__ops: Single tag driver structures
700 *
701 * Helper macro for DSA tag drivers which do not do anything special
702 * in module init/exit. Each module may only use this macro once, and
703 * calling it replaces module_init() and module_exit().
704 */
705#define module_dsa_tag_driver(__ops) \
706DSA_TAG_DRIVER(__ops); \
707 \
708static struct dsa_tag_driver *dsa_tag_driver_array[] = { \
709 &DSA_TAG_DRIVER_NAME(__ops) \
710}; \
711module_dsa_tag_drivers(dsa_tag_driver_array)
712#endif
713
1/*
2 * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips
3 * Copyright (c) 2008-2009 Marvell Semiconductor
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10
11#ifndef __LINUX_NET_DSA_H
12#define __LINUX_NET_DSA_H
13
14#define DSA_MAX_SWITCHES 4
15#define DSA_MAX_PORTS 12
16
17struct dsa_chip_data {
18 /*
19 * How to access the switch configuration registers.
20 */
21 struct device *mii_bus;
22 int sw_addr;
23
24 /*
25 * The names of the switch's ports. Use "cpu" to
26 * designate the switch port that the cpu is connected to,
27 * "dsa" to indicate that this port is a DSA link to
28 * another switch, NULL to indicate the port is unused,
29 * or any other string to indicate this is a physical port.
30 */
31 char *port_names[DSA_MAX_PORTS];
32
33 /*
34 * An array (with nr_chips elements) of which element [a]
35 * indicates which port on this switch should be used to
36 * send packets to that are destined for switch a. Can be
37 * NULL if there is only one switch chip.
38 */
39 s8 *rtable;
40};
41
42struct dsa_platform_data {
43 /*
44 * Reference to a Linux network interface that connects
45 * to the root switch chip of the tree.
46 */
47 struct device *netdev;
48
49 /*
50 * Info structs describing each of the switch chips
51 * connected via this network interface.
52 */
53 int nr_chips;
54 struct dsa_chip_data *chip;
55};
56
57extern bool dsa_uses_dsa_tags(void *dsa_ptr);
58extern bool dsa_uses_trailer_tags(void *dsa_ptr);
59
60
61#endif