xref: /openbmc/linux/include/linux/dsa/sja1105.h (revision a372d66a)
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 	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 
56 struct 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 
66 static inline struct sja1105_tagger_data *
sja1105_tagger_data(struct dsa_switch * ds)67 sja1105_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 */
76