netdev - [PATCH RFC net-next 03/16] net: phylink: add debug for phylink_major

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Message-Id: <E1tFro6-005xPq-S1@rmk-PC.armlinux.org.uk>
Date: Tue, 26 Nov 2024 09:24:30 +0000
From: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To: Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>
Cc: Alexander Couzens <lynxis@...0.eu>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>,
	Daniel Golle <daniel@...rotopia.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Ioana Ciornei <ioana.ciornei@....com>,
	Jakub Kicinski <kuba@...nel.org>,
	Jose Abreu <Jose.Abreu@...opsys.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	Marcin Wojtas <marcin.s.wojtas@...il.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	netdev@...r.kernel.org,
	Paolo Abeni <pabeni@...hat.com>
Subject: [PATCH RFC net-next 03/16] net: phylink: add debug for
 phylink_major_config()

Now that we have a more complexity in phylink_major_config(), augment
the debugging so we can see what's going on there.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 drivers/net/phy/phylink.c | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index 43a817de4bc8..e43a083cec57 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -175,6 +175,24 @@ static const char *phylink_an_mode_str(unsigned int mode)
 	return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown";
 }
 
+static const char *phylink_pcs_mode_str(unsigned int mode)
+{
+	if (!mode)
+		return "none";
+
+	if (mode & PHYLINK_PCS_NEG_OUTBAND)
+		return "outband";
+
+	if (mode & PHYLINK_PCS_NEG_INBAND) {
+		if (mode & PHYLINK_PCS_NEG_ENABLED)
+			return "inband,an-enabled";
+		else
+			return "inband,an-disabled";
+	}
+
+	return "unknown";
+}
+
 static unsigned int phylink_interface_signal_rate(phy_interface_t interface)
 {
 	switch (interface) {
@@ -1164,7 +1182,9 @@ static void phylink_major_config(struct phylink *pl, bool restart,
 	unsigned int neg_mode;
 	int err;
 
-	phylink_dbg(pl, "major config %s\n", phy_modes(state->interface));
+	phylink_dbg(pl, "major config, requested %s/%s\n",
+		    phylink_an_mode_str(pl->req_link_an_mode),
+		    phy_modes(state->interface));
 
 	if (pl->mac_ops->mac_select_pcs) {
 		pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface);
@@ -1180,6 +1200,11 @@ static void phylink_major_config(struct phylink *pl, bool restart,
 
 	phylink_pcs_neg_mode(pl, pcs, state->interface, state->advertising);
 
+	phylink_dbg(pl, "major config, active %s/%s/%s\n",
+		    phylink_an_mode_str(pl->act_link_an_mode),
+		    phylink_pcs_mode_str(pl->pcs_neg_mode),
+		    phy_modes(state->interface));
+
 	phylink_pcs_poll_stop(pl);
 
 	if (pl->mac_ops->mac_prepare) {
-- 
2.30.2