sja1105.h

 1/* SPDX-License-Identifier: GPL-2.0
 2 * Copyright (c) 2019, Vladimir Oltean <olteanv@gmail.com>
 3 */
 4
 5/* Included by drivers/net/dsa/sja1105/sja1105.h and net/dsa/tag_sja1105.c */
 6
 7#ifndef _NET_DSA_SJA1105_H
 8#define _NET_DSA_SJA1105_H
 9
10#include <linux/skbuff.h>
11#include <linux/etherdevice.h>
12#include <linux/dsa/8021q.h>
13#include <net/dsa.h>
14
15#define ETH_P_SJA1105				ETH_P_DSA_8021Q
16#define ETH_P_SJA1105_META			0x0008
17#define ETH_P_SJA1110				0xdadc
18
19#define SJA1105_DEFAULT_VLAN			(VLAN_N_VID - 1)
20
21/* IEEE 802.3 Annex 57A: Slow Protocols PDUs (01:80:C2:xx:xx:xx) */
22#define SJA1105_LINKLOCAL_FILTER_A		0x0180C2000000ull
23#define SJA1105_LINKLOCAL_FILTER_A_MASK		0xFFFFFF000000ull
24/* IEEE 1588 Annex F: Transport of PTP over Ethernet (01:1B:19:xx:xx:xx) */
25#define SJA1105_LINKLOCAL_FILTER_B		0x011B19000000ull
26#define SJA1105_LINKLOCAL_FILTER_B_MASK		0xFFFFFF000000ull
27
28/* Source and Destination MAC of follow-up meta frames.
29 * Whereas the choice of SMAC only affects the unique identification of the
30 * switch as sender of meta frames, the DMAC must be an address that is present
31 * in the DSA conduit port's multicast MAC filter.
32 * 01-80-C2-00-00-0E is a good choice for this, as all profiles of IEEE 1588
33 * over L2 use this address for some purpose already.
34 */
35#define SJA1105_META_SMAC			0x222222222222ull
36#define SJA1105_META_DMAC			0x0180C200000Eull
37
38enum sja1110_meta_tstamp {
39	SJA1110_META_TSTAMP_TX = 0,
40	SJA1110_META_TSTAMP_RX = 1,
41};
42
43struct sja1105_deferred_xmit_work {
44	struct dsa_port *dp;
45	struct sk_buff *skb;
46	struct kthread_work work;
47};
48
49/* Global tagger data */
50struct sja1105_tagger_data {
51	void (*xmit_work_fn)(struct kthread_work *work);
52	void (*meta_tstamp_handler)(struct dsa_switch *ds, int port, u8 ts_id,
53				    enum sja1110_meta_tstamp dir, u64 tstamp);
54};
55
56struct sja1105_skb_cb {
57	struct sk_buff *clone;
58	u64 tstamp;
59	/* Only valid for packets cloned for 2-step TX timestamping */
60	u8 ts_id;
61};
62
63#define SJA1105_SKB_CB(skb) \
64	((struct sja1105_skb_cb *)((skb)->cb))
65
66static inline struct sja1105_tagger_data *
67sja1105_tagger_data(struct dsa_switch *ds)
68{
69	BUG_ON(ds->dst->tag_ops->proto != DSA_TAG_PROTO_SJA1105 &&
70	       ds->dst->tag_ops->proto != DSA_TAG_PROTO_SJA1110);
71
72	return ds->tagger_data;
73}
74
75#endif /* _NET_DSA_SJA1105_H */