kni: move FIFO functions

Move FIFO functions into kni_fifo.h in order to reuse it for vhost.

Signed-off-by: Intel

lib/librte_eal/linuxapp/kni/kni_fifo.h

@@ -0,0 +1,94 @@
+/*-
+ * GPL LICENSE SUMMARY
+ * 
+ *   Copyright(c) 2010-2013 Intel Corporation. All rights reserved.
+ * 
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of version 2 of the GNU General Public License as
+ *   published by the Free Software Foundation.
+ * 
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *   General Public License for more details.
+ * 
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *   The full GNU General Public License is included in this distribution
+ *   in the file called LICENSE.GPL.
+ * 
+ *   Contact Information:
+ *   Intel Corporation
+ */
+
+#ifndef _KNI_FIFO_H_
+#define _KNI_FIFO_H_
+
+#include <exec-env/rte_kni_common.h>
+
+/**
+ * Adds num elements into the fifo. Return the number actually written
+ */
+static inline unsigned
+kni_fifo_put(struct rte_kni_fifo *fifo, void **data, unsigned num)
+{
+	unsigned i = 0;
+	unsigned fifo_write = fifo->write;
+	unsigned fifo_read = fifo->read;
+	unsigned new_write = fifo_write;
+
+	for (i = 0; i < num; i++) {
+		new_write = (new_write + 1) & (fifo->len - 1);
+
+		if (new_write == fifo_read)
+			break;
+		fifo->buffer[fifo_write] = data[i];
+		fifo_write = new_write;
+	}
+	fifo->write = fifo_write;
+
+	return i;
+}
+
+/**
+ * Get up to num elements from the fifo. Return the number actully read
+ */
+static inline unsigned
+kni_fifo_get(struct rte_kni_fifo *fifo, void **data, unsigned num)
+{
+	unsigned i = 0;
+	unsigned new_read = fifo->read;
+	unsigned fifo_write = fifo->write;
+
+	for (i = 0; i < num; i++) {
+		if (new_read == fifo_write)
+			break;
+
+		data[i] = fifo->buffer[new_read];
+		new_read = (new_read + 1) & (fifo->len - 1);
+	}
+	fifo->read = new_read;
+
+	return i;
+}
+
+/**
+ * Get the num of elements in the fifo
+ */
+static inline unsigned
+kni_fifo_count(struct rte_kni_fifo *fifo)
+{
+	return (fifo->len + fifo->write - fifo->read) & ( fifo->len - 1);
+}
+
+/**
+ * Get the num of available elements in the fifo
+ */
+static inline unsigned
+kni_fifo_free_count(struct rte_kni_fifo *fifo)
+{
+	return (fifo->read - fifo->write - 1) & (fifo->len - 1);
+}
+
+#endif /* _KNI_FIFO_H_ */

lib/librte_eal/linuxapp/kni/kni_net.c

@@ -38,6 +38,7 @@
 
 #include <rte_config.h>
 #include <exec-env/rte_kni_common.h>
+#include <kni_fifo.h>
 #include "kni_dev.h"
 
 #define WD_TIMEOUT 5 /*jiffies */
@@ -59,68 +60,6 @@ static int kni_net_process_request(struct kni_dev *kni,
 /* kni rx function pointer, with default to normal rx */
 static kni_net_rx_t kni_net_rx_func = kni_net_rx_normal;
 
-
-/**
- * Adds num elements into the fifo. Return the number actually written
- */
-static inline unsigned
-kni_fifo_put(struct rte_kni_fifo *fifo, void **data, unsigned num)
-{
-	unsigned i = 0;
-	unsigned fifo_write = fifo->write;
-	unsigned fifo_read = fifo->read;
-	unsigned new_write = fifo_write;
-
-	for (i = 0; i < num; i++) {
-		new_write = (new_write + 1) & (fifo->len - 1);
-
-		if (new_write == fifo_read)
-			break;
-		fifo->buffer[fifo_write] = data[i];
-		fifo_write = new_write;
-	}
-	fifo->write = fifo_write;
-	return i;
-}
-
-/**
- * Get up to num elements from the fifo. Return the number actully read
- */
-static inline unsigned
-kni_fifo_get(struct rte_kni_fifo *fifo, void **data, unsigned num)
-{
-	unsigned i = 0;
-	unsigned new_read = fifo->read;
-	unsigned fifo_write = fifo->write;
-	for (i = 0; i < num; i++) {
-		if (new_read == fifo_write)
-			break;
-
-		data[i] = fifo->buffer[new_read];
-		new_read = (new_read + 1) & (fifo->len - 1);
-	}
-	fifo->read = new_read;
-	return i;
-}
-
-/**
- * Get the num of elements in the fifo
- */
-static inline unsigned
-kni_fifo_count(struct rte_kni_fifo *fifo)
-{
-	return (fifo->len + fifo->write - fifo->read) &( fifo->len - 1);
-}
-
-/**
- * Get the num of available lements in the fifo
- */
-static inline unsigned
-kni_fifo_free_count(struct rte_kni_fifo *fifo)
-{
-	return (fifo->read - fifo->write - 1) & (fifo->len - 1);
-}
-
 /*
  * Open and close
  */