linux-kernel - [PATCH v3 4/5] firmware: arm_scmi: Create debugfs files for statistics

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Message-Id: <20240715133751.2877197-5-luke.parkin@arm.com>
Date: Mon, 15 Jul 2024 14:37:50 +0100
From: Luke Parkin <luke.parkin@....com>
To: linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	arm-scmi@...r.kernel.org
Cc: sudeep.holla@....com,
	cristian.marussi@....com,
	Luke Parkin <luke.parkin@....com>
Subject: [PATCH v3 4/5] firmware: arm_scmi: Create debugfs files for statistics

Create debugfs files for the statistics in the scmi_debug_stats struct

Signed-off-by: Luke Parkin <luke.parkin@....com>
v2->v3
Add extra statistics also added in v3
v1->v2
Only create stats pointer if stats are enabled
Move stats debugfs creation into a seperate helper function
---
 drivers/firmware/arm_scmi/driver.c | 38 ++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index b22f104cda36..9378e2d8af4f 100644
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c
@@ -2865,6 +2865,41 @@ static int scmi_device_request_notifier(struct notifier_block *nb,
 	return NOTIFY_OK;
 }
 
+static void scmi_debugfs_stats_setup(struct scmi_info *info,
+				     struct dentry *trans)
+{
+	struct dentry *stats;
+
+	stats = debugfs_create_dir("stats", trans);
+
+	debugfs_create_atomic_t("sent_ok", 0400, stats,
+				&info->dbg_stats[SENT_OK]);
+	debugfs_create_atomic_t("sent_fail", 0400, stats,
+				&info->dbg_stats[SENT_FAIL]);
+	debugfs_create_atomic_t("sent_fail_polling_unsupported", 0400, stats,
+				&info->dbg_stats[SENT_FAIL_POLLING_UNSUPPORTED]);
+	debugfs_create_atomic_t("sent_fail_channel_not_found", 0400, stats,
+				&info->dbg_stats[SENT_FAIL_CHANNEL_NOT_FOUND]);
+	debugfs_create_atomic_t("response_ok", 0400, stats,
+				&info->dbg_stats[RESPONSE_OK]);
+	debugfs_create_atomic_t("notif_ok", 0400, stats,
+				&info->dbg_stats[NOTIF_OK]);
+	debugfs_create_atomic_t("dlyd_resp_ok", 0400, stats,
+				&info->dbg_stats[DLYD_RESPONSE_OK]);
+	debugfs_create_atomic_t("xfers_resp_timeout", 0400, stats,
+				&info->dbg_stats[XFERS_RESPONSE_TIMEOUT]);
+	debugfs_create_atomic_t("response_polled_ok", 0400, stats,
+				&info->dbg_stats[RESPONSE_POLLED_OK]);
+	debugfs_create_atomic_t("err_msg_unexpected", 0400, stats,
+				&info->dbg_stats[ERR_MSG_UNEXPECTED]);
+	debugfs_create_atomic_t("err_msg_invalid", 0400, stats,
+				&info->dbg_stats[ERR_MSG_INVALID]);
+	debugfs_create_atomic_t("err_msg_nomem", 0400, stats,
+				&info->dbg_stats[ERR_MSG_NOMEM]);
+	debugfs_create_atomic_t("err_protocol", 0400, stats,
+				&info->dbg_stats[ERR_PROTOCOL]);
+}
+
 static void scmi_debugfs_common_cleanup(void *d)
 {
 	struct scmi_debug_info *dbg = d;
@@ -2931,6 +2966,9 @@ static struct scmi_debug_info *scmi_debugfs_common_setup(struct scmi_info *info)
 	debugfs_create_u32("rx_max_msg", 0400, trans,
 			   (u32 *)&info->rx_minfo.max_msg);
 
+	if (IS_ENABLED(CONFIG_ARM_SCMI_DEBUG_STATISTICS))
+		scmi_debugfs_stats_setup(info, trans);
+
 	dbg->top_dentry = top_dentry;
 
 	if (devm_add_action_or_reset(info->dev,
-- 
2.34.1