summaryrefslogtreecommitdiffstats
path: root/include/net/dsa.h
blob: ad1681f80b6f269bc3780bc60872933516b284b0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips
 * Copyright (c) 2008-2009 Marvell Semiconductor
 */

#ifndef __LINUX_NET_DSA_H
#define __LINUX_NET_DSA_H

#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/list.h>
#include <linux/notifier.h>
#include <linux/timer.h>
#include <linux/workqueue.h>
#include <linux/of.h>
#include <linux/ethtool.h>
#include <linux/net_tstamp.h>
#include <linux/phy.h>
#include <linux/platform_data/dsa.h>
#include <linux/phylink.h>
#include <net/devlink.h>
#include <net/switchdev.h>

struct tc_action;
struct phy_device;
struct fixed_phy_status;
struct phylink_link_state;

#define DSA_TAG_PROTO_NONE_VALUE		0
#define DSA_TAG_PROTO_BRCM_VALUE		1
#define DSA_TAG_PROTO_BRCM_PREPEND_VALUE	2
#define DSA_TAG_PROTO_DSA_VALUE			3
#define DSA_TAG_PROTO_EDSA_VALUE		4
#define DSA_TAG_PROTO_GSWIP_VALUE		5
#define DSA_TAG_PROTO_KSZ9477_VALUE		6
#define DSA_TAG_PROTO_KSZ9893_VALUE		7
#define DSA_TAG_PROTO_LAN9303_VALUE		8
#define DSA_TAG_PROTO_MTK_VALUE			9
#define DSA_TAG_PROTO_QCA_VALUE			10
#define DSA_TAG_PROTO_TRAILER_VALUE		11
#define DSA_TAG_PROTO_8021Q_VALUE		12
#define DSA_TAG_PROTO_SJA1105_VALUE		13
#define DSA_TAG_PROTO_KSZ8795_VALUE		14
#define DSA_TAG_PROTO_OCELOT_VALUE		15

enum dsa_tag_protocol {
	DSA_TAG_PROTO_NONE		= DSA_TAG_PROTO_NONE_VALUE,
	DSA_TAG_PROTO_BRCM		= DSA_TAG_PROTO_BRCM_VALUE,
	DSA_TAG_PROTO_BRCM_PREPEND	= DSA_TAG_PROTO_BRCM_PREPEND_VALUE,
	DSA_TAG_PROTO_DSA		= DSA_TAG_PROTO_DSA_VALUE,
	DSA_TAG_PROTO_EDSA		= DSA_TAG_PROTO_EDSA_VALUE,
	DSA_TAG_PROTO_GSWIP		= DSA_TAG_PROTO_GSWIP_VALUE,
	DSA_TAG_PROTO_KSZ9477		= DSA_TAG_PROTO_KSZ9477_VALUE,
	DSA_TAG_PROTO_KSZ9893		= DSA_TAG_PROTO_KSZ9893_VALUE,
	DSA_TAG_PROTO_LAN9303		= DSA_TAG_PROTO_LAN9303_VALUE,
	DSA_TAG_PROTO_MTK		= DSA_TAG_PROTO_MTK_VALUE,
	DSA_TAG_PROTO_QCA		= DSA_TAG_PROTO_QCA_VALUE,
	DSA_TAG_PROTO_TRAILER		= DSA_TAG_PROTO_TRAILER_VALUE,
	DSA_TAG_PROTO_8021Q		= DSA_TAG_PROTO_8021Q_VALUE,
	DSA_TAG_PROTO_SJA1105		= DSA_TAG_PROTO_SJA1105_VALUE,
	DSA_TAG_PROTO_KSZ8795		= DSA_TAG_PROTO_KSZ8795_VALUE,
	DSA_TAG_PROTO_OCELOT		= DSA_TAG_PROTO_OCELOT_VALUE,
};

struct packet_type;
struct dsa_switch;

struct dsa_device_ops {
	struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev);
	struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
			       struct packet_type *pt);
	int (*flow_dissect)(const struct sk_buff *skb, __be16 *proto,
			    int *offset);
	/* Used to determine which traffic should match the DSA filter in
	 * eth_type_trans, and which, if any, should bypass it and be processed
	 * as regular on the master net device.
	 */
	bool (*filter)(const struct sk_buff *skb, struct net_device *dev);
	unsigned int overhead;
	const char *name;
	enum dsa_tag_protocol proto;
};

#define DSA_TAG_DRIVER_ALIAS "dsa_tag-"
#define MODULE_ALIAS_DSA_TAG_DRIVER(__proto)				\
	MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE))

struct dsa_skb_cb {
	struct sk_buff *clone;
	bool deferred_xmit;
};

struct __dsa_skb_cb {
	struct dsa_skb_cb cb;
	u8 priv[48 - sizeof(struct dsa_skb_cb)];
};

#define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb))

#define DSA_SKB_CB_PRIV(skb)			\
	((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv))

struct dsa_switch_tree {
	struct list_head	list;

	/* Notifier chain for switch-wide events */
	struct raw_notifier_head	nh;

	/* Tree identifier */
	unsigned int index;

	/* Number of switches attached to this tree */
	struct kref refcount;

	/* Has this tree been applied to the hardware? */
	bool setup;

	/*
	 * Configuration data for the platform device that owns
	 * this dsa switch tree instance.
	 */
	struct dsa_platform_data	*pd;

	/* List of switch ports */
	struct list_head ports;

	/* List of DSA links composing the routing table */
	struct list_head rtable;
};

/* TC matchall action types, only mirroring for now */
enum dsa_port_mall_action_type {
	DSA_PORT_MALL_MIRROR,
};

/* TC mirroring entry */
struct dsa_mall_mirror_tc_entry {
	u8 to_local_port;
	bool ingress;
};

/* TC matchall entry */
struct dsa_mall_tc_entry {
	struct list_head list;
	unsigned long cookie;
	enum dsa_port_mall_action_type type;
	union {
		struct dsa_mall_mirror_tc_entry mirror;
	};
};


struct dsa_port {
	/* A CPU port is physically connected to a master device.
	 * A user port exposed to userspace has a slave device.
	 */
	union {
		struct net_device *master;
		struct net_device *slave;
	};

	/* CPU port tagging operations used by master or slave devices */
	const struct dsa_device_ops *tag_ops;

	/* Copies for faster access in master receive hot path */
	struct dsa_switch_tree *dst;
	struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
			       struct packet_type *pt);
	bool (*filter)(const struct sk_buff *skb, struct net_device *dev);

	enum {
		DSA_PORT_TYPE_UNUSED = 0,
		DSA_PORT_TYPE_CPU,
		DSA_PORT_TYPE_DSA,
		DSA_PORT_TYPE_USER,
	} type;

	struct dsa_switch	*ds;
	unsigned int		index;
	const char		*name;
	struct dsa_port		*cpu_dp;
	const char		*mac;
	struct device_node	*dn;
	unsigned int		ageing_time;
	bool			vlan_filtering;
	u8			stp_state;
	struct net_device	*bridge_dev;
	struct devlink_port	devlink_port;
	struct phylink		*pl;
	struct phylink_config	pl_config;

	struct work_struct	xmit_work;
	struct sk_buff_head	xmit_queue;

	struct list_head list;

	/*
	 * Give the switch driver somewhere to hang its per-port private data
	 * structures (accessible from the tagger).
	 */
	void *priv;

	/*
	 * Original copy of the master netdev ethtool_ops
	 */
	const struct ethtool_ops *orig_ethtool_ops;

	/*
	 * Original copy of the master netdev net_device_ops
	 */
	const struct net_device_ops *orig_ndo_ops;

	bool setup;
};

/* TODO: ideally DSA ports would have a single dp->link_dp member,
 * and no dst->rtable nor this struct dsa_link would be needed,
 * but this would require some more complex tree walking,
 * so keep it stupid at the moment and list them all.
 */
struct dsa_link {
	struct dsa_port *dp;
	struct dsa_port *link_dp;
	struct list_head list;
};

struct dsa_switch {
	bool setup;

	struct device *dev;

	/*
	 * Parent switch tree, and switch index.
	 */
	struct dsa_switch_tree	*dst;
	unsigned int		index;

	/* Listener for switch fabric events */
	struct notifier_block	nb;

	/*
	 * Give the switch driver somewhere to hang its private data
	 * structure.
	 */
	void *priv;

	/*
	 * Configuration data for this switch.
	 */
	struct dsa_chip_data	*cd;

	/*
	 * The switch operations.
	 */
	const struct dsa_switch_ops	*ops;

	/*
	 * Slave mii_bus and devices for the individual ports.
	 */
	u32			phys_mii_mask;
	struct mii_bus		*slave_mii_bus;

	/* Ageing Time limits in msecs */
	unsigned int ageing_time_min;
	unsigned int ageing_time_max;

	/* devlink used to represent this switch device */
	struct devlink		*devlink;

	/* Number of switch port queues */
	unsigned int		num_tx_queues;

	/* Disallow bridge core from requesting different VLAN awareness
	 * settings on ports if not hardware-supported
	 */
	bool			vlan_filtering_is_global;

	/* In case vlan_filtering_is_global is set, the VLAN awareness state
	 * should be retrieved from here and not from the per-port settings.
	 */
	bool			vlan_filtering;

	size_t num_ports;
};

static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
{
	struct dsa_switch_tree *dst = ds->dst;
	struct dsa_port *dp;

	list_for_each_entry(dp, &dst->ports, list)
		if (dp->ds == ds && dp->index == p)
			return dp;

	return NULL;
}

static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p)
{
	return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED;
}

static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
{
	return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU;
}

static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
{
	return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA;
}

static inline bool dsa_is_user_port(struct dsa_switch *ds, int p)
{
	return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER;
}

static inline u32 dsa_user_ports(struct dsa_switch *ds)
{
	u32 mask = 0;
	int p;

	for (p = 0; p < ds->num_ports; p++)
		if (dsa_is_user_port(ds, p))
			mask |= BIT(p);

	return mask;
}

/* Return the local port used to reach an arbitrary switch device */
static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device)
{
	struct dsa_switch_tree *dst = ds->dst;
	struct dsa_link *dl;

	list_for_each_entry(dl, &dst->rtable, list)
		if (dl->dp->ds == ds && dl->link_dp->ds->index == device)
			return dl->dp->index;

	return ds->num_ports;
}

/* Return the local port used to reach an arbitrary switch port */
static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device,
					    int port)
{
	if (device == ds->index)
		return port;
	else
		return dsa_routing_port(ds, device);
}

/* Return the local port used to reach the dedicated CPU port */
static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port)
{
	const struct dsa_port *dp = dsa_to_port(ds, port);
	const struct dsa_port *cpu_dp = dp->cpu_dp;

	if (!cpu_dp)
		return port;

	return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index);
}

static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp)
{
	const struct dsa_switch *ds = dp->ds;

	if (ds->vlan_filtering_is_global)
		return ds->vlan_filtering;
	else
		return dp->vlan_filtering;
}

typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
			      bool is_static, void *data);
struct dsa_switch_ops {
	enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds,
						  int port);

	int	(*setup)(struct dsa_switch *ds);
	void	(*teardown)(struct dsa_switch *ds);
	u32	(*get_phy_flags)(struct dsa_switch *ds, int port);

	/*
	 * Access to the switch's PHY registers.
	 */
	int	(*phy_read)(struct dsa_switch *ds, int port, int regnum);
	int	(*phy_write)(struct dsa_switch *ds, int port,
			     int regnum, u16 val);

	/*
	 * Link state adjustment (called from libphy)
	 */
	void	(*adjust_link)(struct dsa_switch *ds, int port,
				struct phy_device *phydev);
	void	(*fixed_link_update)(struct dsa_switch *ds, int port,
				struct fixed_phy_status *st);

	/*
	 * PHYLINK integration
	 */
	void	(*phylink_validate)(struct dsa_switch *ds, int port,
				    unsigned long *supported,
				    struct phylink_link_state *state);
	int	(*phylink_mac_link_state)(struct dsa_switch *ds, int port,
					  struct phylink_link_state *state);
	void	(*phylink_mac_config)(struct dsa_switch *ds, int port,
				      unsigned int mode,
				      const struct phylink_link_state *state);
	void	(*phylink_mac_an_restart)(struct dsa_switch *ds, int port);
	void	(*phylink_mac_link_down)(struct dsa_switch *ds, int port,
					 unsigned int mode,
					 phy_interface_t interface);
	void	(*phylink_mac_link_up)(struct dsa_switch *ds, int port,
				       unsigned int mode,
				       phy_interface_t interface,
				       struct phy_device *phydev,
				       int speed, int duplex,
				       bool tx_pause, bool rx_pause);
	void	(*phylink_fixed_state)(struct dsa_switch *ds, int port,
				       struct phylink_link_state *state);
	/*
	 * ethtool hardware statistics.
	 */
	void	(*get_strings)(struct dsa_switch *ds, int port,
			       u32 stringset, uint8_t *data);
	void	(*get_ethtool_stats)(struct dsa_switch *ds,
				     int port, uint64_t *data);
	int	(*get_sset_count)(struct dsa_switch *ds, int port, int sset);
	void	(*get_ethtool_phy_stats)(struct dsa_switch *ds,
					 int port, uint64_t *data);

	/*
	 * ethtool Wake-on-LAN
	 */
	void	(*get_wol)(struct dsa_switch *ds, int port,
			   struct ethtool_wolinfo *w);
	int	(*set_wol)(struct dsa_switch *ds, int port,
			   struct ethtool_wolinfo *w);

	/*
	 * ethtool timestamp info
	 */
	int	(*get_ts_info)(struct dsa_switch *ds, int port,
			       struct ethtool_ts_info *ts);

	/*
	 * Suspend and resume
	 */
	int	(*suspend)(struct dsa_switch *ds);
	int	(*resume)(struct dsa_switch *ds);

	/*
	 * Port enable/disable
	 */
	int	(*port_enable)(struct dsa_switch *ds, int port,
			       struct phy_device *phy);
	void	(*port_disable)(struct dsa_switch *ds, int port);

	/*
	 * Port's MAC EEE settings
	 */
	int	(*set_mac_eee)(struct dsa_switch *ds, int port,
			       struct ethtool_eee *e);
	int	(*get_mac_eee)(struct dsa_switch *ds, int port,
			       struct ethtool_eee *e);

	/* EEPROM access */
	int	(*get_eeprom_len)(struct dsa_switch *ds);
	int	(*get_eeprom)(struct dsa_switch *ds,
			      struct ethtool_eeprom *eeprom, u8 *data);
	int	(*set_eeprom)(struct dsa_switch *ds,
			      struct ethtool_eeprom *eeprom, u8 *data);

	/*
	 * Register access.
	 */
	int	(*get_regs_len)(struct dsa_switch *ds, int port);
	void	(*get_regs)(struct dsa_switch *ds, int port,
			    struct ethtool_regs *regs, void *p);

	/*
	 * Bridge integration
	 */
	int	(*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs);
	int	(*port_bridge_join)(struct dsa_switch *ds, int port,
				    struct net_device *bridge);
	void	(*port_bridge_leave)(struct dsa_switch *ds, int port,
				     struct net_device *bridge);
	void	(*port_stp_state_set)(struct dsa_switch *ds, int port,
				      u8 state);
	void	(*port_fast_age)(struct dsa_switch *ds, int port);
	int	(*port_egress_floods)(struct dsa_switch *ds, int port,
				      bool unicast, bool multicast);

	/*
	 * VLAN support
	 */
	int	(*port_vlan_filtering)(struct dsa_switch *ds, int port,
				       bool vlan_filtering);
	int (*port_vlan_prepare)(struct dsa_switch *ds, int port,
				 const struct switchdev_obj_port_vlan *vlan);
	void (*port_vlan_add)(struct dsa_switch *ds, int port,
			      const struct switchdev_obj_port_vlan *vlan);
	int	(*port_vlan_del)(struct dsa_switch *ds, int port,
				 const struct switchdev_obj_port_vlan *vlan);
	/*
	 * Forwarding database
	 */
	int	(*port_fdb_add)(struct dsa_switch *ds, int port,
				const unsigned char *addr, u16 vid);
	int	(*port_fdb_del)(struct dsa_switch *ds, int port,
				const unsigned char *addr, u16 vid);
	int	(*port_fdb_dump)(struct dsa_switch *ds, int port,
				 dsa_fdb_dump_cb_t *cb, void *data);

	/*
	 * Multicast database
	 */
	int (*port_mdb_prepare)(struct dsa_switch *ds, int port,
				const struct switchdev_obj_port_mdb *mdb);
	void (*port_mdb_add)(struct dsa_switch *ds, int port,
			     const struct switchdev_obj_port_mdb *mdb);
	int	(*port_mdb_del)(struct dsa_switch *ds, int port,
				const struct switchdev_obj_port_mdb *mdb);
	/*
	 * RXNFC
	 */
	int	(*get_rxnfc)(struct dsa_switch *ds, int port,
			     struct ethtool_rxnfc *nfc, u32 *rule_locs);
	int	(*set_rxnfc)(struct dsa_switch *ds, int port,
			     struct ethtool_rxnfc *nfc);

	/*
	 * TC integration
	 */
	int	(*port_mirror_add)(struct dsa_switch *ds, int port,
				   struct dsa_mall_mirror_tc_entry *mirror,
				   bool ingress);
	void	(*port_mirror_del)(struct dsa_switch *ds, int port,
				   struct dsa_mall_mirror_tc_entry *mirror);
	int	(*port_setup_tc)(struct dsa_switch *ds, int port,
				 enum tc_setup_type type, void *type_data);

	/*
	 * Cross-chip operations
	 */
	int	(*crosschip_bridge_join)(struct dsa_switch *ds, int sw_index,
					 int port, struct net_device *br);
	void	(*crosschip_bridge_leave)(struct dsa_switch *ds, int sw_index,
					  int port, struct net_device *br);

	/*
	 * PTP functionality
	 */
	int	(*port_hwtstamp_get)(struct dsa_switch *ds, int port,
				     struct ifreq *ifr);
	int	(*port_hwtstamp_set)(struct dsa_switch *ds, int port,
				     struct ifreq *ifr);
	bool	(*port_txtstamp)(struct dsa_switch *ds, int port,
				 struct sk_buff *clone, unsigned int type);
	bool	(*port_rxtstamp)(struct dsa_switch *ds, int port,
				 struct sk_buff *skb, unsigned int type);

	/*
	 * Deferred frame Tx
	 */
	netdev_tx_t (*port_deferred_xmit)(struct dsa_switch *ds, int port,
					  struct sk_buff *skb);
	/* Devlink parameters */
	int	(*devlink_param_get)(struct dsa_switch *ds, u32 id,
				     struct devlink_param_gset_ctx *ctx);
	int	(*devlink_param_set)(struct dsa_switch *ds, u32 id,
				     struct devlink_param_gset_ctx *ctx);
};

#define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes)		\
	DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes,		\
			     dsa_devlink_param_get, dsa_devlink_param_set, NULL)

int dsa_devlink_param_get(struct devlink *dl, u32 id,
			  struct devlink_param_gset_ctx *ctx);
int dsa_devlink_param_set(struct devlink *dl, u32 id,
			  struct devlink_param_gset_ctx *ctx);
int dsa_devlink_params_register(struct dsa_switch *ds,
				const struct devlink_param *params,
				size_t params_count);
void dsa_devlink_params_unregister(struct dsa_switch *ds,
				   const struct devlink_param *params,
				   size_t params_count);
int dsa_devlink_resource_register(struct dsa_switch *ds,
				  const char *resource_name,
				  u64 resource_size,
				  u64 resource_id,
				  u64 parent_resource_id,
				  const struct devlink_resource_size_params *size_params);

void dsa_devlink_resources_unregister(struct dsa_switch *ds);

void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds,
					   u64 resource_id,
					   devlink_resource_occ_get_t *occ_get,
					   void *occ_get_priv);
void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds,
					     u64 resource_id);

struct dsa_devlink_priv {
	struct dsa_switch *ds;
};

struct dsa_switch_driver {
	struct list_head	list;
	const struct dsa_switch_ops *ops;
};

struct net_device *dsa_dev_to_net_device(struct device *dev);

/* Keep inline for faster access in hot path */
static inline bool netdev_uses_dsa(struct net_device *dev)
{
#if IS_ENABLED(CONFIG_NET_DSA)
	return dev->dsa_ptr && dev->dsa_ptr->rcv;
#endif
	return false;
}

static inline bool dsa_can_decode(const struct sk_buff *skb,
				  struct net_device *dev)
{
#if IS_ENABLED(CONFIG_NET_DSA)
	return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev);
#endif
	return false;
}

void dsa_unregister_switch(struct dsa_switch *ds);
int dsa_register_switch(struct dsa_switch *ds);
#ifdef CONFIG_PM_SLEEP
int dsa_switch_suspend(struct dsa_switch *ds);
int dsa_switch_resume(struct dsa_switch *ds);
#else
static inline int dsa_switch_suspend(struct dsa_switch *ds)
{
	return 0;
}
static inline int dsa_switch_resume(struct dsa_switch *ds)
{
	return 0;
}
#endif /* CONFIG_PM_SLEEP */

enum dsa_notifier_type {
	DSA_PORT_REGISTER,
	DSA_PORT_UNREGISTER,
};

struct dsa_notifier_info {
	struct net_device *dev;
};

struct dsa_notifier_register_info {
	struct dsa_notifier_info info;	/* must be first */
	struct net_device *master;
	unsigned int port_number;
	unsigned int switch_number;
};

static inline struct net_device *
dsa_notifier_info_to_dev(const struct dsa_notifier_info *info)
{
	return info->dev;
}

#if IS_ENABLED(CONFIG_NET_DSA)
int register_dsa_notifier(struct notifier_block *nb);
int unregister_dsa_notifier(struct notifier_block *nb);
int call_dsa_notifiers(unsigned long val, struct net_device *dev,
		       struct dsa_notifier_info *info);
#else
static inline int register_dsa_notifier(struct notifier_block *nb)
{
	return 0;
}

static inline int unregister_dsa_notifier(struct notifier_block *nb)
{
	return 0;
}

static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev,
				     struct dsa_notifier_info *info)
{
	return NOTIFY_DONE;
}
#endif

/* Broadcom tag specific helpers to insert and extract queue/port number */
#define BRCM_TAG_SET_PORT_QUEUE(p, q)	((p) << 8 | q)
#define BRCM_TAG_GET_PORT(v)		((v) >> 8)
#define BRCM_TAG_GET_QUEUE(v)		((v) & 0xff)


netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev);
int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data);
int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data);
int dsa_port_get_phy_sset_count(struct dsa_port *dp);
void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up);

struct dsa_tag_driver {
	const struct dsa_device_ops *ops;
	struct list_head list;
	struct module *owner;
};

void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[],
			      unsigned int count,
			      struct module *owner);
void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[],
				unsigned int count);

#define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count)	\
static int __init dsa_tag_driver_module_init(void)			\
{									\
	dsa_tag_drivers_register(__dsa_tag_drivers_array, __count,	\
				 THIS_MODULE);				\
	return 0;							\
}									\
module_init(dsa_tag_driver_module_init);				\
									\
static void __exit dsa_tag_driver_module_exit(void)			\
{									\
	dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count);	\
}									\
module_exit(dsa_tag_driver_module_exit)

/**
 * module_dsa_tag_drivers() - Helper macro for registering DSA tag
 * drivers
 * @__ops_array: Array of tag driver strucutres
 *
 * Helper macro for DSA tag drivers which do not do anything special
 * in module init/exit. Each module may only use this macro once, and
 * calling it replaces module_init() and module_exit().
 */
#define module_dsa_tag_drivers(__ops_array)				\
dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array))

#define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops

/* Create a static structure we can build a linked list of dsa_tag
 * drivers
 */
#define DSA_TAG_DRIVER(__ops)						\
static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = {		\
	.ops = &__ops,							\
}

/**
 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag
 * driver
 * @__ops: Single tag driver structures
 *
 * Helper macro for DSA tag drivers which do not do anything special
 * in module init/exit. Each module may only use this macro once, and
 * calling it replaces module_init() and module_exit().
 */
#define module_dsa_tag_driver(__ops)					\
DSA_TAG_DRIVER(__ops);							\
									\
static struct dsa_tag_driver *dsa_tag_driver_array[] =	{		\
	&DSA_TAG_DRIVER_NAME(__ops)					\
};									\
module_dsa_tag_drivers(dsa_tag_driver_array)
#endif