From: Yuiko Oshino <yuiko.osh...@microchip.com>

Signed-off-by: Yuiko Oshino <yuiko.osh...@microchip.com>

---

Changes in v3:
   - This patch is added to a series.

Changes in v2:
   - The patch's tag is changed to net:.

 include/linux/mii.h | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/include/linux/mii.h b/include/linux/mii.h
index 66b83d8..19afb74 100644
--- a/include/linux/mii.h
+++ b/include/linux/mii.h
@@ -190,4 +190,27 @@ static inline unsigned int mii_duplex (unsigned int 
duplex_lock,
        return 0;
 }
 
+/**
+ * mii_resolve_flowctrl_fdx
+ * @lcladv: value of MII ADVERTISE register
+ * @rmtadv: value of MII LPA register
+ *
+ * Resolve full duplex flow control as per IEEE 802.3-2005 table 28B-3
+ */
+static inline u8 mii_resolve_flowctrl_fdx(u16 lcladv, u16 rmtadv)
+{
+       u8 cap = 0;
+
+       if (lcladv & rmtadv & ADVERTISE_PAUSE_CAP) {
+               cap = FLOW_CTRL_TX | FLOW_CTRL_RX;
+       } else if (lcladv & rmtadv & ADVERTISE_PAUSE_ASYM) {
+               if (lcladv & ADVERTISE_PAUSE_CAP)
+                       cap = FLOW_CTRL_RX;
+               else if (rmtadv & ADVERTISE_PAUSE_CAP)
+                       cap = FLOW_CTRL_TX;
+       }
+
+       return cap;
+}
+
 #endif /* __LINUX_MII_H__ */
-- 
2.7.4


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