1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * I2C slave tracepoints
4 *
5 * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
6 */
7#undef TRACE_SYSTEM
8#define TRACE_SYSTEM i2c_slave
9
10#if !defined(_TRACE_I2C_SLAVE_H) || defined(TRACE_HEADER_MULTI_READ)
11#define _TRACE_I2C_SLAVE_H
12
13#include <linux/i2c.h>
14#include <linux/tracepoint.h>
15
16TRACE_DEFINE_ENUM(I2C_SLAVE_READ_REQUESTED);
17TRACE_DEFINE_ENUM(I2C_SLAVE_WRITE_REQUESTED);
18TRACE_DEFINE_ENUM(I2C_SLAVE_READ_PROCESSED);
19TRACE_DEFINE_ENUM(I2C_SLAVE_WRITE_RECEIVED);
20TRACE_DEFINE_ENUM(I2C_SLAVE_STOP);
21
22#define show_event_type(type)						\
23	__print_symbolic(type,						\
24		{ I2C_SLAVE_READ_REQUESTED,	"RD_REQ" },		\
25		{ I2C_SLAVE_WRITE_REQUESTED,	"WR_REQ" },		\
26		{ I2C_SLAVE_READ_PROCESSED,	"RD_PRO" },		\
27		{ I2C_SLAVE_WRITE_RECEIVED,	"WR_RCV" },		\
28		{ I2C_SLAVE_STOP,		"  STOP" })
29
30TRACE_EVENT(i2c_slave,
31	TP_PROTO(const struct i2c_client *client, enum i2c_slave_event event,
32		 __u8 *val, int cb_ret),
33	TP_ARGS(client, event, val, cb_ret),
34	TP_STRUCT__entry(
35		__field(int,				adapter_nr	)
36		__field(int,				ret		)
37		__field(__u16,				addr		)
38		__field(__u16,				len		)
39		__field(enum i2c_slave_event,		event		)
40		__array(__u8,				buf,	1)	),
41
42	TP_fast_assign(
43		__entry->adapter_nr = client->adapter->nr;
44		__entry->addr = client->addr;
45		__entry->event = event;
46		__entry->ret = cb_ret;
47		switch (event) {
48		case I2C_SLAVE_READ_REQUESTED:
49		case I2C_SLAVE_READ_PROCESSED:
50		case I2C_SLAVE_WRITE_RECEIVED:
51			__entry->len = 1;
52			memcpy(__entry->buf, val, __entry->len);
53			break;
54		default:
55			__entry->len = 0;
56			break;
57		}
58		),
59	TP_printk("i2c-%d a=%03x ret=%d %s [%*phD]",
60		__entry->adapter_nr, __entry->addr, __entry->ret,
61		show_event_type(__entry->event), __entry->len, __entry->buf
62		));
63
64#endif /* _TRACE_I2C_SLAVE_H */
65
66/* This part must be outside protection */
67#include <trace/define_trace.h>
68