netdev - [PATCH net-next 2/5] net: mii: add linkmode_adv_to_mii_adv

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Message-Id: <E1jC08z-0001cK-Mg@rmk-PC.armlinux.org.uk>
Date:   Wed, 11 Mar 2020 12:07:25 +0000
From:   Russell King <rmk+kernel@...linux.org.uk>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>
Cc:     "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: [PATCH net-next 2/5] net: mii: add linkmode_adv_to_mii_adv_x()

Add a helper to convert a linkmode advertisement to a clause 37
advertisement value for 1000base-x and 2500base-x.

Signed-off-by: Russell King <rmk+kernel@...linux.org.uk>
---
 include/linux/mii.h | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/include/linux/mii.h b/include/linux/mii.h
index 309de4a3e6e7..219b93cad1dd 100644
--- a/include/linux/mii.h
+++ b/include/linux/mii.h
@@ -536,6 +536,26 @@ static inline void mii_lpa_mod_linkmode_x(unsigned long *linkmodes, u16 lpa,
 			 lpa & LPA_1000XFULL);
 }
 
+/**
+ * linkmode_adv_to_mii_adv_x - encode a linkmode to config_reg
+ * @linkmodes: linkmodes
+ * @fd_bit: full duplex bit
+ */
+static inline u16 linkmode_adv_to_mii_adv_x(const unsigned long *linkmodes,
+					    int fd_bit)
+{
+	u16 adv = 0;
+
+	if (linkmode_test_bit(fd_bit, linkmodes))
+		adv |= ADVERTISE_1000XFULL;
+	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, linkmodes))
+		adv |= ADVERTISE_1000XPAUSE;
+	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, linkmodes))
+		adv |= ADVERTISE_1000XPSE_ASYM;
+
+	return adv;
+}
+
 /**
  * mii_advertise_flowctrl - get flow control advertisement flags
  * @cap: Flow control capabilities (FLOW_CTRL_RX, FLOW_CTRL_TX or both)
-- 
2.20.1