include: trace: Add SCMI header with trace events

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@broadcom.com>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

diff --git a/MAINTAINERS b/MAINTAINERS
index bd5847e..5bea079 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15965,6 +15965,7 @@ 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@kernel.org>

diff --git a/include/trace/events/scmi.h b/include/trace/events/scmi.h
new file mode 100644 (file)
index 0000000..f076c43
--- /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>