import netmap_kring_on() from FreeBSD

alliedtelesis · Aug 24, 2020 · 42785fd · 42785fd
1 parent cd656a1
commit 42785fd
Showing 1 changed file with 18 additions and 0 deletions.
diff --git a/sys/dev/netmap/netmap_kern.h b/sys/dev/netmap/netmap_kern.h
@@ -1401,6 +1401,24 @@ nm_native_on(struct netmap_adapter *na)
 	return nm_netmap_on(na) && (na->na_flags & NAF_NATIVE);
 }
 
+static inline struct netmap_kring *
+netmap_kring_on(struct netmap_adapter *na, u_int q, enum txrx t)
+{
+        struct netmap_kring *kring = NULL;
+
+        if (!nm_native_on(na))
+                return NULL;
+
+        if (t == NR_RX && q < na->num_rx_rings)
+                kring = na->rx_rings[q];
+        else if (t == NR_TX && q < na->num_tx_rings)
+                kring = na->tx_rings[q];
+        else
+                return NULL;
+
+        return (kring->nr_mode == NKR_NETMAP_ON) ? kring : NULL;
+}
+
 static inline int
 nm_iszombie(struct netmap_adapter *na)
 {