mii: Add mii_advertise_flowctrl()

This converts flow control capabilites to an advertising mask and can be useful in combination with mii_resolve_flowctrl_fdx(). Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>

mii: Add mii_advertise_flowctrl()
This converts flow control capabilites to an advertising mask and can be useful in combination with mii_resolve_flowctrl_fdx(). Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Ben Hutchings · David S. Miller
1 parent 44c22ee91b
Showing 1 changed file with 16 additions and 0 deletions Side-by-side Diff
include/linux/mii.h
@@ -240,6 +240,22 @@
 }
  
 /**
+ * mii_advertise_flowctrl - get flow control advertisement flags
+ * @cap: Flow control capabilities (FLOW_CTRL_RX, FLOW_CTRL_TX or both)
+ */
+static inline u16 mii_advertise_flowctrl(int cap)
+{
+	u16 adv = 0;
+
+	if (cap & FLOW_CTRL_RX)
+		adv = ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
+	if (cap & FLOW_CTRL_TX)
+		adv ^= ADVERTISE_PAUSE_ASYM;
+
+	return adv;
+}
+
+/**
  * mii_resolve_flowctrl_fdx
  * @lcladv: value of MII ADVERTISE register
  * @rmtadv: value of MII LPA register
...	...	@@ -240,6 +240,22 @@
240	240	}
241	241
242	242	/**
	243	+ * mii_advertise_flowctrl - get flow control advertisement flags
	244	+ * @cap: Flow control capabilities (FLOW_CTRL_RX, FLOW_CTRL_TX or both)
	245	+ */
	246	+static inline u16 mii_advertise_flowctrl(int cap)
	247	+{
	248	+ u16 adv = 0;
	249	+
	250	+ if (cap & FLOW_CTRL_RX)
	251	+ adv = ADVERTISE_PAUSE_CAP \| ADVERTISE_PAUSE_ASYM;
	252	+ if (cap & FLOW_CTRL_TX)
	253	+ adv ^= ADVERTISE_PAUSE_ASYM;
	254	+
	255	+ return adv;
	256	+}
	257	+
	258	+/**
243	259	* mii_resolve_flowctrl_fdx
244	260	* @lcladv: value of MII ADVERTISE register
245	261	* @rmtadv: value of MII LPA register