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

source code of linux/include/trace/events/i2c_slave.h