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Commit 2d012373 authored by Wade Farnsworth's avatar Wade Farnsworth Committed by Mauro Carvalho Chehab
Browse files

[media] v4l2-dev: Add tracepoints for QBUF and DQBUF 



Add tracepoints to the QBUF and DQBUF ioctls to enable rudimentary
performance measurements using standard kernel tracers.

[m.chehab@samsung.com: CodingStyle fixes (whitespacing)]
Signed-off-by: default avatarWade Farnsworth <wade_farnsworth@mentor.com>

Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
parent 324ed533

drivers/media/v4l2-core/v4l2-dev.c

+9 −0
Original line number Diff line number Diff line
@@ -31,6 +31,10 @@ 
#include <media/v4l2-device.h>

#include <media/v4l2-ioctl.h>





#define CREATE_TRACE_POINTS

#include <trace/events/v4l2.h>



#define VIDEO_NUM_DEVICES	256

#define VIDEO_NAME              "video4linux"
@@ -391,6 +395,11 @@ static long v4l2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 
	} else

		ret = -ENOTTY;



	if (cmd == VIDIOC_DQBUF)

		trace_v4l2_dqbuf(vdev->minor, (struct v4l2_buffer *)arg);

	else if (cmd == VIDIOC_QBUF)

		trace_v4l2_qbuf(vdev->minor, (struct v4l2_buffer *)arg);



	return ret;

}

include/trace/events/v4l2.h

0 → 100644
+157 −0
Original line number Diff line number Diff line 
#undef TRACE_SYSTEM

#define TRACE_SYSTEM v4l2



#if !defined(_TRACE_V4L2_H) || defined(TRACE_HEADER_MULTI_READ)

#define _TRACE_V4L2_H



#include <linux/tracepoint.h>



#define show_type(type)							       \

	__print_symbolic(type,						       \

		{ V4L2_BUF_TYPE_VIDEO_CAPTURE,	      "VIDEO_CAPTURE" },       \

		{ V4L2_BUF_TYPE_VIDEO_OUTPUT,	      "VIDEO_OUTPUT" },	       \

		{ V4L2_BUF_TYPE_VIDEO_OVERLAY,	      "VIDEO_OVERLAY" },       \

		{ V4L2_BUF_TYPE_VBI_CAPTURE,	      "VBI_CAPTURE" },	       \

		{ V4L2_BUF_TYPE_VBI_OUTPUT,	      "VBI_OUTPUT" },	       \

		{ V4L2_BUF_TYPE_SLICED_VBI_CAPTURE,   "SLICED_VBI_CAPTURE" },  \

		{ V4L2_BUF_TYPE_SLICED_VBI_OUTPUT,    "SLICED_VBI_OUTPUT" },   \

		{ V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY, "VIDEO_OUTPUT_OVERLAY" },\

		{ V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE, "VIDEO_CAPTURE_MPLANE" },\

		{ V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,  "VIDEO_OUTPUT_MPLANE" }, \

		{ V4L2_BUF_TYPE_PRIVATE,	      "PRIVATE" })



#define show_field(field)						\

	__print_symbolic(field,						\

		{ V4L2_FIELD_ANY,		"ANY" },		\

		{ V4L2_FIELD_NONE,		"NONE" },		\

		{ V4L2_FIELD_TOP,		"TOP" },		\

		{ V4L2_FIELD_BOTTOM,		"BOTTOM" },		\

		{ V4L2_FIELD_INTERLACED,	"INTERLACED" },		\

		{ V4L2_FIELD_SEQ_TB,		"SEQ_TB" },		\

		{ V4L2_FIELD_SEQ_BT,		"SEQ_BT" },		\

		{ V4L2_FIELD_ALTERNATE,		"ALTERNATE" },		\

		{ V4L2_FIELD_INTERLACED_TB,	"INTERLACED_TB" },      \

		{ V4L2_FIELD_INTERLACED_BT,	"INTERLACED_BT" })



#define show_timecode_type(type)					\

	__print_symbolic(type,						\

		{ V4L2_TC_TYPE_24FPS,		"24FPS" },		\

		{ V4L2_TC_TYPE_25FPS,		"25FPS" },		\

		{ V4L2_TC_TYPE_30FPS,		"30FPS" },		\

		{ V4L2_TC_TYPE_50FPS,		"50FPS" },		\

		{ V4L2_TC_TYPE_60FPS,		"60FPS" })



#define show_flags(flags)						      \

	__print_flags(flags, "|",					      \

		{ V4L2_BUF_FLAG_MAPPED,		     "MAPPED" },	      \

		{ V4L2_BUF_FLAG_QUEUED,		     "QUEUED" },	      \

		{ V4L2_BUF_FLAG_DONE,		     "DONE" },		      \

		{ V4L2_BUF_FLAG_KEYFRAME,	     "KEYFRAME" },	      \

		{ V4L2_BUF_FLAG_PFRAME,		     "PFRAME" },	      \

		{ V4L2_BUF_FLAG_BFRAME,		     "BFRAME" },	      \

		{ V4L2_BUF_FLAG_ERROR,		     "ERROR" },		      \

		{ V4L2_BUF_FLAG_TIMECODE,	     "TIMECODE" },	      \

		{ V4L2_BUF_FLAG_PREPARED,	     "PREPARED" },	      \

		{ V4L2_BUF_FLAG_NO_CACHE_INVALIDATE, "NO_CACHE_INVALIDATE" }, \

		{ V4L2_BUF_FLAG_NO_CACHE_CLEAN,	     "NO_CACHE_CLEAN" },      \

		{ V4L2_BUF_FLAG_TIMESTAMP_MASK,	     "TIMESTAMP_MASK" },      \

		{ V4L2_BUF_FLAG_TIMESTAMP_UNKNOWN,   "TIMESTAMP_UNKNOWN" },   \

		{ V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC, "TIMESTAMP_MONOTONIC" }, \

		{ V4L2_BUF_FLAG_TIMESTAMP_COPY,	     "TIMESTAMP_COPY" })



#define show_timecode_flags(flags)					  \

	__print_flags(flags, "|",					  \

		{ V4L2_TC_FLAG_DROPFRAME,       "DROPFRAME" },		  \

		{ V4L2_TC_FLAG_COLORFRAME,      "COLORFRAME" },		  \

		{ V4L2_TC_USERBITS_USERDEFINED,	"USERBITS_USERDEFINED" }, \

		{ V4L2_TC_USERBITS_8BITCHARS,	"USERBITS_8BITCHARS" })



#define V4L2_TRACE_EVENT(event_name)					\

	TRACE_EVENT(event_name,						\

		TP_PROTO(int minor, struct v4l2_buffer *buf),		\

									\

		TP_ARGS(minor, buf),					\

									\

		TP_STRUCT__entry(					\

			__field(int, minor)				\

			__field(u32, index)				\

			__field(u32, type)				\

			__field(u32, bytesused)				\

			__field(u32, flags)				\

			__field(u32, field)				\

			__field(s64, timestamp)				\

			__field(u32, timecode_type)			\

			__field(u32, timecode_flags)			\

			__field(u8, timecode_frames)			\

			__field(u8, timecode_seconds)			\

			__field(u8, timecode_minutes)			\

			__field(u8, timecode_hours)			\

			__field(u8, timecode_userbits0)			\

			__field(u8, timecode_userbits1)			\

			__field(u8, timecode_userbits2)			\

			__field(u8, timecode_userbits3)			\

			__field(u32, sequence)				\

		),							\

									\

		TP_fast_assign(						\

			__entry->minor = minor;				\

			__entry->index = buf->index;			\

			__entry->type = buf->type;			\

			__entry->bytesused = buf->bytesused;		\

			__entry->flags = buf->flags;			\

			__entry->field = buf->field;			\

			__entry->timestamp =				\

				timeval_to_ns(&buf->timestamp);		\

			__entry->timecode_type = buf->timecode.type;	\

			__entry->timecode_flags = buf->timecode.flags;	\

			__entry->timecode_frames =			\

				buf->timecode.frames;			\

			__entry->timecode_seconds =			\

				buf->timecode.seconds;			\

			__entry->timecode_minutes =			\

				buf->timecode.minutes;			\

			__entry->timecode_hours = buf->timecode.hours;	\

			__entry->timecode_userbits0 =			\

				buf->timecode.userbits[0];		\

			__entry->timecode_userbits1 =			\

				buf->timecode.userbits[1];		\

			__entry->timecode_userbits2 =			\

				buf->timecode.userbits[2];		\

			__entry->timecode_userbits3 =			\

				buf->timecode.userbits[3];		\

			__entry->sequence = buf->sequence;		\

		),							\

									\

		TP_printk("minor = %d, index = %u, type = %s, "		\

			  "bytesused = %u, flags = %s, "		\

			  "field = %s, timestamp = %llu, timecode = { "	\

			  "type = %s, flags = %s, frames = %u, "	\

			  "seconds = %u, minutes = %u, hours = %u, "	\

			  "userbits = { %u %u %u %u } }, "		\

			  "sequence = %u", __entry->minor,		\

			  __entry->index, show_type(__entry->type),	\

			  __entry->bytesused,				\

			  show_flags(__entry->flags),			\

			  show_field(__entry->field),			\

			  __entry->timestamp,				\

			  show_timecode_type(__entry->timecode_type),	\

			  show_timecode_flags(__entry->timecode_flags),	\

			  __entry->timecode_frames,			\

			  __entry->timecode_seconds,			\

			  __entry->timecode_minutes,			\

			  __entry->timecode_hours,			\

			  __entry->timecode_userbits0,			\

			  __entry->timecode_userbits1,			\

			  __entry->timecode_userbits2,			\

			  __entry->timecode_userbits3,			\

			  __entry->sequence				\

		)							\

	)



V4L2_TRACE_EVENT(v4l2_dqbuf);

V4L2_TRACE_EVENT(v4l2_qbuf);



#endif /* if !defined(_TRACE_V4L2_H) || defined(TRACE_HEADER_MULTI_READ) */



/* This part must be outside protection */

#include <trace/define_trace.h>