tjh.dev
Linux kernel mirror (for testing)
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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#define SJA1105_HWTS_RX_EN 0
39
40/* Global tagger data: each struct sja1105_port has a reference to
41 * the structure defined in struct sja1105_private.
42 */
43struct sja1105_tagger_data {
44 struct sk_buff *stampable_skb;
45 /* Protects concurrent access to the meta state machine
46 * from taggers running on multiple ports on SMP systems
47 */
48 spinlock_t meta_lock;
49 unsigned long state;
50 u8 ts_id;
51 /* Used on SJA1110 where meta frames are generated only for
52 * 2-step TX timestamps
53 */
54 struct sk_buff_head skb_txtstamp_queue;
55};
56
57struct sja1105_skb_cb {
58 struct sk_buff *clone;
59 u64 tstamp;
60 /* Only valid for packets cloned for 2-step TX timestamping */
61 u8 ts_id;
62};
63
64#define SJA1105_SKB_CB(skb) \
65 ((struct sja1105_skb_cb *)((skb)->cb))
66
67struct sja1105_port {
68 struct kthread_worker *xmit_worker;
69 struct kthread_work xmit_work;
70 struct sk_buff_head xmit_queue;
71 struct sja1105_tagger_data *data;
72 bool hwts_tx_en;
73};
74
75/* Timestamps are in units of 8 ns clock ticks (equivalent to
76 * a fixed 125 MHz clock).
77 */
78#define SJA1105_TICK_NS 8
79
80static inline s64 ns_to_sja1105_ticks(s64 ns)
81{
82 return ns / SJA1105_TICK_NS;
83}
84
85static inline s64 sja1105_ticks_to_ns(s64 ticks)
86{
87 return ticks * SJA1105_TICK_NS;
88}
89
90static inline bool dsa_port_is_sja1105(struct dsa_port *dp)
91{
92 return true;
93}
94
95#endif /* _NET_DSA_SJA1105_H */