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 master 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
38 enum sja1110_meta_tstamp {
39 SJA1110_META_TSTAMP_TX = 0,
40 SJA1110_META_TSTAMP_RX = 1,
41 };
42
43 struct 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 */
50 struct sja1105_tagger_data {
51 /* Tagger to switch */
52 void (*xmit_work_fn)(struct kthread_work *work);
53 void (*meta_tstamp_handler)(struct dsa_switch *ds, int port, u8 ts_id,
54 enum sja1110_meta_tstamp dir, u64 tstamp);
55 /* Switch to tagger */
56 bool (*rxtstamp_get_state)(struct dsa_switch *ds);
57 void (*rxtstamp_set_state)(struct dsa_switch *ds, bool on);
58 };
59
60 struct sja1105_skb_cb {
61 struct sk_buff *clone;
62 u64 tstamp;
63 /* Only valid for packets cloned for 2-step TX timestamping */
64 u8 ts_id;
65 };
66
67 #define SJA1105_SKB_CB(skb) \
68 ((struct sja1105_skb_cb *)((skb)->cb))
69
70 static inline struct sja1105_tagger_data *
sja1105_tagger_data(struct dsa_switch * ds)71 sja1105_tagger_data(struct dsa_switch *ds)
72 {
73 BUG_ON(ds->dst->tag_ops->proto != DSA_TAG_PROTO_SJA1105 &&
74 ds->dst->tag_ops->proto != DSA_TAG_PROTO_SJA1110);
75
76 return ds->tagger_data;
77 }
78
79 #endif /* _NET_DSA_SJA1105_H */
80
