linux-kernel - [PATCH v2 1/2] include: trace: Add SCMI header with trace events

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Date:   Tue, 17 Dec 2019 13:43:44 +0000
From:   lukasz.luba@....com
To:     linux-kernel@...r.kernel.org, sudeep.holla@....com,
        linux-arm-kernel@...ts.infradead.org
Cc:     rostedt@...dmis.org, mingo@...hat.com, james.quinlan@...adcom.com,
        Lukasz Luba <lukasz.luba@....com>
Subject: [PATCH v2 1/2] include: trace: Add SCMI header with trace events

From: Lukasz Luba <lukasz.luba@....com>

Adding trace events would help to measure the speed of the communication
channel. It can be also potentially used helpful during investigation
of some issues platforms which use different transport layer.

Update also MAINTAINERS file with information that the new trace events
are maintained.

Suggested-by: Jim Quinlan <james.quinlan@...adcom.com>
Signed-off-by: Lukasz Luba <lukasz.luba@....com>
---
 MAINTAINERS                 |  1 +
 include/trace/events/scmi.h | 90 +++++++++++++++++++++++++++++++++++++
 2 files changed, 91 insertions(+)
 create mode 100644 include/trace/events/scmi.h

diff --git a/MAINTAINERS b/MAINTAINERS
index cc0a4a8ae06a..0182315226fc 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15966,6 +15966,7 @@ F:	drivers/firmware/arm_scpi.c
 F:	drivers/firmware/arm_scmi/
 F:	drivers/reset/reset-scmi.c
 F:	include/linux/sc[mp]i_protocol.h
+F:	include/trace/events/scmi.h
 
 SYSTEM RESET/SHUTDOWN DRIVERS
 M:	Sebastian Reichel <sre@...nel.org>
diff --git a/include/trace/events/scmi.h b/include/trace/events/scmi.h
new file mode 100644
index 000000000000..f076c430d243
--- /dev/null
+++ b/include/trace/events/scmi.h
@@ -0,0 +1,90 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM scmi
+
+#if !defined(_TRACE_SCMI_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_SCMI_H
+
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(scmi_xfer_begin,
+	TP_PROTO(int transfer_id, u8 msg_id, u8 protocol_id, u16 seq,
+		 bool poll),
+	TP_ARGS(transfer_id, msg_id, protocol_id, seq, poll),
+
+	TP_STRUCT__entry(
+		__field(int, transfer_id)
+		__field(u8, msg_id)
+		__field(u8, protocol_id)
+		__field(u16, seq)
+		__field(bool, poll)
+	),
+
+	TP_fast_assign(
+		__entry->transfer_id = transfer_id;
+		__entry->msg_id = msg_id;
+		__entry->protocol_id = protocol_id;
+		__entry->seq = seq;
+		__entry->poll = poll;
+	),
+
+	TP_printk("transfer_id=%d msg_id=%u protocol_id=%u seq=%u poll=%u",
+		__entry->transfer_id, __entry->msg_id, __entry->protocol_id,
+		__entry->seq, __entry->poll)
+);
+
+TRACE_EVENT(scmi_xfer_end,
+	TP_PROTO(int transfer_id, u8 msg_id, u8 protocol_id, u16 seq,
+		 u32 status),
+	TP_ARGS(transfer_id, msg_id, protocol_id, seq, status),
+
+	TP_STRUCT__entry(
+		__field(int, transfer_id)
+		__field(u8, msg_id)
+		__field(u8, protocol_id)
+		__field(u16, seq)
+		__field(u32, status)
+	),
+
+	TP_fast_assign(
+		__entry->transfer_id = transfer_id;
+		__entry->msg_id = msg_id;
+		__entry->protocol_id = protocol_id;
+		__entry->seq = seq;
+		__entry->status = status;
+	),
+
+	TP_printk("transfer_id=%d msg_id=%u protocol_id=%u seq=%u status=%u",
+		__entry->transfer_id, __entry->msg_id, __entry->protocol_id,
+		__entry->seq, __entry->status)
+);
+
+TRACE_EVENT(scmi_rx_done,
+	TP_PROTO(int transfer_id, u8 msg_id, u8 protocol_id, u16 seq,
+		 u8 msg_type),
+	TP_ARGS(transfer_id, msg_id, protocol_id, seq, msg_type),
+
+	TP_STRUCT__entry(
+		__field(int, transfer_id)
+		__field(u8, msg_id)
+		__field(u8, protocol_id)
+		__field(u16, seq)
+		__field(u8, msg_type)
+	),
+
+	TP_fast_assign(
+		__entry->transfer_id = transfer_id;
+		__entry->msg_id = msg_id;
+		__entry->protocol_id = protocol_id;
+		__entry->seq = seq;
+		__entry->msg_type = msg_type;
+	),
+
+	TP_printk("transfer_id=%d msg_id=%u protocol_id=%u seq=%u msg_type=%u",
+		__entry->transfer_id, __entry->msg_id, __entry->protocol_id,
+		__entry->seq, __entry->msg_type)
+);
+#endif /* _TRACE_SCMI_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
-- 
2.17.1