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From:   Sean Anderson <sean.anderson@seco.com>
To:     netdev@vger.kernel.org, Andrew Lunn <andrew@lunn.ch>,
        Heiner Kallweit <hkallweit1@gmail.com>,
        Russell King <linux@armlinux.org.uk>
Cc:     "David S . Miller" <davem@davemloft.net>,
        Paolo Abeni <pabeni@redhat.com>,
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        linux-kernel@vger.kernel.org, Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Alexandru Marginean <alexandru.marginean@nxp.com>,
        Sean Anderson <sean.anderson@seco.com>
Subject: [PATCH net-next v4 03/10] net: phylink: Export phylink_caps_to_linkmodes
Date:   Thu, 18 Aug 2022 12:46:09 -0400
Message-Id: <20220818164616.2064242-4-sean.anderson@seco.com>
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This function is convenient for MAC drivers. They can use it to add or
remove particular link modes based on capabilities (such as if half
duplex is not supported for a particular interface mode).

Signed-off-by: Sean Anderson <sean.anderson@seco.com>
---

(no changes since v1)

 drivers/net/phy/phylink.c | 12 ++++++++++--
 include/linux/phylink.h   |  1 +
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index b08716fe22c1..51e66320526f 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -155,8 +155,15 @@ static const char *phylink_an_mode_str(unsigned int mode)
 	return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown";
 }
 
-static void phylink_caps_to_linkmodes(unsigned long *linkmodes,
-				      unsigned long caps)
+/**
+ * phylink_caps_to_linkmodes() - Convert capabilities to ethtool link modes
+ * @linkmodes: ethtool linkmode mask (must be already initialised)
+ * @caps: bitmask of MAC capabilities
+ *
+ * Set all possible pause, speed and duplex linkmodes in @linkmodes that are
+ * supported by the @caps. @linkmodes must have been initialised previously.
+ */
+void phylink_caps_to_linkmodes(unsigned long *linkmodes, unsigned long caps)
 {
 	if (caps & MAC_SYM_PAUSE)
 		__set_bit(ETHTOOL_LINK_MODE_Pause_BIT, linkmodes);
@@ -295,6 +302,7 @@ static void phylink_caps_to_linkmodes(unsigned long *linkmodes,
 		__set_bit(ETHTOOL_LINK_MODE_400000baseCR4_Full_BIT, linkmodes);
 	}
 }
+EXPORT_SYMBOL_GPL(phylink_caps_to_linkmodes);
 
 /**
  * phylink_get_linkmodes() - get acceptable link modes
diff --git a/include/linux/phylink.h b/include/linux/phylink.h
index 9629bcd594b1..2a6d2f7a7ebb 100644
--- a/include/linux/phylink.h
+++ b/include/linux/phylink.h
@@ -534,6 +534,7 @@ void pcs_link_up(struct phylink_pcs *pcs, unsigned int mode,
 		 phy_interface_t interface, int speed, int duplex);
 #endif
 
+void phylink_caps_to_linkmodes(unsigned long *linkmodes, unsigned long caps);
 void phylink_get_linkmodes(unsigned long *linkmodes, phy_interface_t interface,
 			   unsigned long mac_capabilities);
 void phylink_generic_validate(struct phylink_config *config,
-- 
2.35.1.1320.gc452695387.dirty