linux-kernel - [PATCH 2/2] remoteproc: qcom: Add trace events for q6v5

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Date:   Mon,  9 Nov 2020 17:20:41 -0800
From:   Rishabh Bhatnagar <rishabhb@...eaurora.org>
To:     linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     bjorn.andersson@...aro.org, tsoni@...eaurora.org,
        psodagud@...eaurora.org, sidgup@...eaurora.org,
        Rishabh Bhatnagar <rishabhb@...eaurora.org>
Subject: [PATCH 2/2] remoteproc: qcom: Add trace events for q6v5_pas driver

Add tracepoints for q6v5_pas driver. These will help in
analyzing the time taken by each step in remoteproc
bootup/shutdown process and also serve as standard
checkpoints in code.

Signed-off-by: Rishabh Bhatnagar <rishabhb@...eaurora.org>
---
 drivers/remoteproc/qcom_q6v5_pas.c | 11 +++++++++++
 include/trace/events/q6v5_pas.h    | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 45 insertions(+)
 create mode 100644 include/trace/events/q6v5_pas.h

diff --git a/drivers/remoteproc/qcom_q6v5_pas.c b/drivers/remoteproc/qcom_q6v5_pas.c
index 3837f23..b3c0a6a 100644
--- a/drivers/remoteproc/qcom_q6v5_pas.c
+++ b/drivers/remoteproc/qcom_q6v5_pas.c
@@ -29,6 +29,9 @@
 #include "qcom_q6v5.h"
 #include "remoteproc_internal.h"
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/q6v5_pas.h>
+
 struct adsp_data {
 	int crash_reason_smem;
 	const char *firmware_name;
@@ -121,12 +124,14 @@ static int adsp_load(struct rproc *rproc, const struct firmware *fw)
 	struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
 	int ret;
 
+	trace_q6v5_pas("setting up memory and loading segments", rproc->name);
 	ret = qcom_mdt_load(adsp->dev, fw, rproc->firmware, adsp->pas_id,
 			    adsp->mem_region, adsp->mem_phys, adsp->mem_size,
 			    &adsp->mem_reloc);
 	if (ret)
 		return ret;
 
+	trace_q6v5_pas("done loading segments", rproc->name);
 	qcom_pil_info_store(adsp->info_name, adsp->mem_phys, adsp->mem_size);
 
 	return 0;
@@ -137,6 +142,7 @@ static int adsp_start(struct rproc *rproc)
 	struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
 	int ret;
 
+	trace_q6v5_pas("Voting for resources", rproc->name);
 	qcom_q6v5_prepare(&adsp->q6v5);
 
 	ret = adsp_pds_enable(adsp, adsp->active_pds, adsp->active_pd_count);
@@ -163,12 +169,14 @@ static int adsp_start(struct rproc *rproc)
 	if (ret)
 		goto disable_cx_supply;
 
+	trace_q6v5_pas("Before authenticate and reset", rproc->name);
 	ret = qcom_scm_pas_auth_and_reset(adsp->pas_id);
 	if (ret) {
 		dev_err(adsp->dev,
 			"failed to authenticate image and release reset\n");
 		goto disable_px_supply;
 	}
+	trace_q6v5_pas("After authenticate and reset", rproc->name);
 
 	ret = qcom_q6v5_wait_for_start(&adsp->q6v5, msecs_to_jiffies(5000));
 	if (ret == -ETIMEDOUT) {
@@ -177,6 +185,7 @@ static int adsp_start(struct rproc *rproc)
 		goto disable_px_supply;
 	}
 
+	trace_q6v5_pas("Remoteproc is up", rproc->name);
 	return 0;
 
 disable_px_supply:
@@ -214,6 +223,7 @@ static int adsp_stop(struct rproc *rproc)
 	int handover;
 	int ret;
 
+	trace_q6v5_pas("Request stop", rproc->name);
 	ret = qcom_q6v5_request_stop(&adsp->q6v5);
 	if (ret == -ETIMEDOUT)
 		dev_err(adsp->dev, "timed out on wait\n");
@@ -227,6 +237,7 @@ static int adsp_stop(struct rproc *rproc)
 	if (handover)
 		qcom_pas_handover(&adsp->q6v5);
 
+	trace_q6v5_pas("Remoteproc is down", rproc->name);
 	return ret;
 }
 
diff --git a/include/trace/events/q6v5_pas.h b/include/trace/events/q6v5_pas.h
new file mode 100644
index 0000000..38ee5e2
--- /dev/null
+++ b/include/trace/events/q6v5_pas.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2020, The Linux Foundation. All rights reserved.
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM q6v5_pas
+
+#if !defined(_TRACE_Q6V5_PAS_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_Q6V5_PAS_H
+
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(q6v5_pas,
+
+	TP_PROTO(const char *event, const char *rproc_name),
+
+	TP_ARGS(event, rproc_name),
+
+	TP_STRUCT__entry(
+		__string(event, event)
+		__string(rproc_name, rproc_name)
+	),
+
+	TP_fast_assign(
+		__assign_str(event, event);
+		__assign_str(rproc_name, rproc_name);
+	),
+
+	TP_printk("event=%s remoteproc:%s", __get_str(event), __get_str(rproc_name))
+);
+
+#endif
+#include <trace/define_trace.h>
-- 
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