X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_kni%2Frte_kni_fifo.h;h=d2ec82fe87fc1edadd31e9b8ba9718bf942bbfe8;hb=55f0335e90908b4f052594c14f7636413b894676;hp=287d7deb292ceffffaec8dae9674e8d63a881ec0;hpb=fd5f33323e5a698941db03908d5bd1fa91016b7e;p=dpdk.git

diff --git a/lib/librte_kni/rte_kni_fifo.h b/lib/librte_kni/rte_kni_fifo.h
index 287d7deb29..d2ec82fe87 100644
--- a/lib/librte_kni/rte_kni_fifo.h
+++ b/lib/librte_kni/rte_kni_fifo.h
@@ -104,3 +104,14 @@ kni_fifo_count(struct rte_kni_fifo *fifo)
 	unsigned fifo_read = __KNI_LOAD_ACQUIRE(&fifo->read);
 	return (fifo->len + fifo_write - fifo_read) & (fifo->len - 1);
 }
+
+/**
+ * Get the num of available elements in the fifo
+ */
+static inline uint32_t
+kni_fifo_free_count(struct rte_kni_fifo *fifo)
+{
+	uint32_t fifo_write = __KNI_LOAD_ACQUIRE(&fifo->write);
+	uint32_t fifo_read = __KNI_LOAD_ACQUIRE(&fifo->read);
+	return (fifo_read - fifo_write - 1) & (fifo->len - 1);
+}