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siox: add support for tracing

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Implement tracing for SIOX. There are events for the data that is
written to the bus and for data being read from it.

Acked-by: Gavin Schenk <g.schenk@eckelmann.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Uwe Kleine-König 2017-12-19 10:00:12 +01:00 committed by Greg Kroah-Hartman
parent 658a494a5b
commit 297a344d52
2 changed files with 78 additions and 0 deletions
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12
drivers/siox/siox-core.c
View File

@ -33,6 +33,9 @@
*/
#define SIOX_STATUS_TYPE 0xf0
#define CREATE_TRACE_POINTS
#include <trace/events/siox.h>
static bool siox_is_registered;
static void siox_master_lock(struct siox_master *smaster)
@ -126,6 +129,7 @@ static void siox_poll(struct siox_master *smaster)
{
struct siox_device *sdevice;
size_t i = smaster->setbuf_len;
unsigned int devno = 0;
int unsync_error = 0;
smaster->last_poll = jiffies;
@ -172,6 +176,10 @@ static void siox_poll(struct siox_master *smaster)
sdevice->status_written &= ~SIOX_STATUS_WDG;
smaster->buf[i] = sdevice->status_written;
trace_siox_set_data(smaster, sdevice, devno, i);
devno++;
}
smaster->pushpull(smaster, smaster->setbuf_len, smaster->buf,
@ -181,6 +189,7 @@ static void siox_poll(struct siox_master *smaster)
unsync_error = 0;
/* interpret data pulled in from devices in buf[setbuf_len..] */
devno = 0;
i = smaster->setbuf_len;
list_for_each_entry(sdevice, &smaster->devices, node) {
struct siox_driver *sdriver =
@ -255,10 +264,13 @@ static void siox_poll(struct siox_master *smaster)
sdevice->status_written_lastcycle = sdevice->status_written;
sdevice->connected = connected;
trace_siox_get_data(smaster, sdevice, devno, status_clean, i);
/* only give data read to driver if the device is connected */
if (sdriver && connected)
sdriver->get_data(sdevice, &smaster->buf[i]);
devno++;
i += sdevice->outbytes;
}
}

66
include/trace/events/siox.h Normal file
View File

@ -0,0 +1,66 @@
#undef TRACE_SYSTEM
#define TRACE_SYSTEM siox
#if !defined(_TRACE_SIOX_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_SIOX_H
#include <linux/tracepoint.h>
TRACE_EVENT(siox_set_data,
TP_PROTO(const struct siox_master *smaster,
const struct siox_device *sdevice,
unsigned int devno, size_t bufoffset),
TP_ARGS(smaster, sdevice, devno, bufoffset),
TP_STRUCT__entry(
__field(int, busno)
__field(unsigned int, devno)
__field(size_t, inbytes)
__dynamic_array(u8, buf, sdevice->inbytes)
),
TP_fast_assign(
__entry->busno = smaster->busno;
__entry->devno = devno;
__entry->inbytes = sdevice->inbytes;
memcpy(__get_dynamic_array(buf),
smaster->buf + bufoffset, sdevice->inbytes);
),
TP_printk("siox-%d-%u [%*phD]",
__entry->busno,
__entry->devno,
(int)__entry->inbytes, __get_dynamic_array(buf)
)
);
TRACE_EVENT(siox_get_data,
TP_PROTO(const struct siox_master *smaster,
const struct siox_device *sdevice,
unsigned int devno, u8 status_clean,
size_t bufoffset),
TP_ARGS(smaster, sdevice, devno, status_clean, bufoffset),
TP_STRUCT__entry(
__field(int, busno)
__field(unsigned int, devno)
__field(u8, status_clean)
__field(size_t, outbytes)
__dynamic_array(u8, buf, sdevice->outbytes)
),
TP_fast_assign(
__entry->busno = smaster->busno;
__entry->devno = devno;
__entry->status_clean = status_clean;
__entry->outbytes = sdevice->outbytes;
memcpy(__get_dynamic_array(buf),
smaster->buf + bufoffset, sdevice->outbytes);
),
TP_printk("siox-%d-%u (%02hhx) [%*phD]",
__entry->busno,
__entry->devno,
__entry->status_clean,
(int)__entry->outbytes, __get_dynamic_array(buf)
)
);
#endif /* if !defined(_TRACE_SIOX_H) || defined(TRACE_HEADER_MULTI_READ) */
/* This part must be outside protection */
#include <trace/define_trace.h>