qed: Add basic L2 interface

This patch adds a public API for a network driver to work on top of QED.
The interface itself is very minimal - it's mostly infrastructure, as the
only content it has after this patch is a query for HW-based information
required for the creation of a network interface [I.e., no actual
protocol-specific configurations are supported].

Signed-off-by: Manish Chopra <Manish.Chopra@qlogic.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: Ariel Elior <Ariel.Elior@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/qed/qed_eth_if.h

@@ -0,0 +1,38 @@
+/* QLogic qed NIC Driver
+ * Copyright (c) 2015 QLogic Corporation
+ *
+ * This software is available under the terms of the GNU General Public License
+ * (GPL) Version 2, available from the file COPYING in the main directory of
+ * this source tree.
+ */
+
+#ifndef _QED_ETH_IF_H
+#define _QED_ETH_IF_H
+
+#include <linux/list.h>
+#include <linux/if_link.h>
+#include <linux/qed/eth_common.h>
+#include <linux/qed/qed_if.h>
+
+struct qed_dev_eth_info {
+	struct qed_dev_info common;
+
+	u8	num_queues;
+	u8	num_tc;
+
+	u8	port_mac[ETH_ALEN];
+	u8	num_vlan_filters;
+};
+
+struct qed_eth_ops {
+	const struct qed_common_ops *common;
+
+	int (*fill_dev_info)(struct qed_dev *cdev,
+			     struct qed_dev_eth_info *info);
+
+};
+
+const struct qed_eth_ops *qed_get_eth_ops(u32 version);
+void qed_put_eth_ops(void);
+
+#endif