xref: /openbmc/linux/include/trace/events/i2c_slave.h (revision d714fb25)
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 
16 TRACE_DEFINE_ENUM(I2C_SLAVE_READ_REQUESTED);
17 TRACE_DEFINE_ENUM(I2C_SLAVE_WRITE_REQUESTED);
18 TRACE_DEFINE_ENUM(I2C_SLAVE_READ_PROCESSED);
19 TRACE_DEFINE_ENUM(I2C_SLAVE_WRITE_RECEIVED);
20 TRACE_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 
30 TRACE_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