ksz_common.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/* Microchip switch tag common header
 3 *
 4 * Copyright (C) 2022 Microchip Technology Inc.
 5 */
 6
 7#ifndef _NET_DSA_KSZ_COMMON_H_
 8#define _NET_DSA_KSZ_COMMON_H_
 9
10#include <net/dsa.h>
11
12/* All time stamps from the KSZ consist of 2 bits for seconds and 30 bits for
13 * nanoseconds. This is NOT the same as 32 bits for nanoseconds.
14 */
15#define KSZ_TSTAMP_SEC_MASK  GENMASK(31, 30)
16#define KSZ_TSTAMP_NSEC_MASK GENMASK(29, 0)
17
18static inline ktime_t ksz_decode_tstamp(u32 tstamp)
19{
20	u64 ns = FIELD_GET(KSZ_TSTAMP_SEC_MASK, tstamp) * NSEC_PER_SEC +
21		 FIELD_GET(KSZ_TSTAMP_NSEC_MASK, tstamp);
22
23	return ns_to_ktime(ns);
24}
25
26struct ksz_deferred_xmit_work {
27	struct dsa_port *dp;
28	struct sk_buff *skb;
29	struct kthread_work work;
30};
31
32struct ksz_tagger_data {
33	void (*xmit_work_fn)(struct kthread_work *work);
34	void (*hwtstamp_set_state)(struct dsa_switch *ds, bool on);
35};
36
37struct ksz_skb_cb {
38	struct sk_buff *clone;
39	unsigned int ptp_type;
40	bool update_correction;
41	u32 tstamp;
42};
43
44#define KSZ_SKB_CB(skb) \
45	((struct ksz_skb_cb *)((skb)->cb))
46
47static inline struct ksz_tagger_data *
48ksz_tagger_data(struct dsa_switch *ds)
49{
50	return ds->tagger_data;
51}
52
53#endif /* _NET_DSA_KSZ_COMMON_H_ */