netdev - [PATCH net-next 3/8] net: mscc: ocelot: debugging print for statistics regions

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Date:   Wed, 12 Apr 2023 15:47:32 +0300
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     netdev@...r.kernel.org
Cc:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        UNGLinuxDriver@...rochip.com,
        Colin Foster <colin.foster@...advantage.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH net-next 3/8] net: mscc: ocelot: debugging print for statistics regions

To make it easier to debug future issues with statistics counters not
getting aggregated properly into regions, like what happened in commit
6acc72a43eac ("net: mscc: ocelot: fix stats region batching"), add some
dev_dbg() prints which show the regions that were dynamically
determined.

Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 drivers/net/ethernet/mscc/ocelot_stats.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/net/ethernet/mscc/ocelot_stats.c b/drivers/net/ethernet/mscc/ocelot_stats.c
index d0e6cd8dbe5c..b50d9d9f8023 100644
--- a/drivers/net/ethernet/mscc/ocelot_stats.c
+++ b/drivers/net/ethernet/mscc/ocelot_stats.c
@@ -925,6 +925,15 @@ static int ocelot_prepare_stats_regions(struct ocelot *ocelot)
 	}
 
 	list_for_each_entry(region, &ocelot->stats_regions, node) {
+		enum ocelot_target target;
+		u32 addr;
+
+		ocelot_reg_to_target_addr(ocelot, region->base, &target,
+					  &addr);
+
+		dev_dbg(ocelot->dev,
+			"region of %d contiguous counters starting with SYS:STAT:CNT[0x%03x]\n",
+			region->count, addr / 4);
 		region->buf = devm_kcalloc(ocelot->dev, region->count,
 					   sizeof(*region->buf), GFP_KERNEL);
 		if (!region->buf)
-- 
2.34.1