netdev - [RFC PATCH v2 net-next 09/15] net: ethtool: introduce ethtool_link_mode

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Date: Sat, 23 Sep 2023 16:48:58 +0300
From: Vladimir Oltean <vladimir.oltean@....com>
To: netdev@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-phy@...ts.infradead.org
Cc: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Andrew Lunn <andrew@...n.ch>,
	Florian Fainelli <f.fainelli@...il.com>,
	Madalin Bucur <madalin.bucur@....com>,
	Ioana Ciornei <ioana.ciornei@....com>,
	Camelia Groza <camelia.groza@....com>,
	Li Yang <leoyang.li@....com>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor@...nel.org>,
	Sean Anderson <sean.anderson@...o.com>,
	Maxime Chevallier <maxime.chevallier@...tlin.com>,
	Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>
Subject: [RFC PATCH v2 net-next 09/15] net: ethtool: introduce ethtool_link_mode_str()

Allow driver code to print stuff like the resolved link mode to the
kernel log, by giving it access to the link_mode_names[] ethtool
internal array which already holds this info.

Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
v1->v2: patch is new

 include/linux/ethtool.h | 6 ++++++
 net/ethtool/common.c    | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 62b61527bcc4..7b144f2b7dfd 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -988,6 +988,12 @@ void
 ethtool_params_from_link_mode(struct ethtool_link_ksettings *link_ksettings,
 			      enum ethtool_link_mode_bit_indices link_mode);
 
+/**
+ * ethtool_link_mode_str - Get name of a given link mode, in string format
+ * @link_mode: the link mode represented in integer format
+ */
+const char *ethtool_link_mode_str(enum ethtool_link_mode_bit_indices link_mode);
+
 /**
  * ethtool_get_phc_vclocks - Derive phc vclocks information, and caller
  *                           is responsible to free memory of vclock_index
diff --git a/net/ethtool/common.c b/net/ethtool/common.c
index 2b3ddea465af..9a79548adb68 100644
--- a/net/ethtool/common.c
+++ b/net/ethtool/common.c
@@ -691,3 +691,9 @@ ethtool_params_from_link_mode(struct ethtool_link_ksettings *link_ksettings,
 	link_ksettings->base.duplex = link_info->duplex;
 }
 EXPORT_SYMBOL_GPL(ethtool_params_from_link_mode);
+
+const char *ethtool_link_mode_str(enum ethtool_link_mode_bit_indices link_mode)
+{
+	return link_mode_names[link_mode];
+}
+EXPORT_SYMBOL(ethtool_link_mode_str);
-- 
2.34.1