netdev: driver: ethernet: add cpsw address lookup engine support

TI CPSW ethernet switch has a built-in address lookup engine.  This patch adds
the code necessary for programming this module.
Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/ti/cpsw_ale.h

+/*
+ * Texas Instruments 3-Port Ethernet Switch Address Lookup Engine APIs
+ *
+ * Copyright (C) 2012 Texas Instruments
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#ifndef __TI_CPSW_ALE_H__
+#define __TI_CPSW_ALE_H__
+
+struct cpsw_ale_params {
+	struct device		*dev;
+	void __iomem		*ale_regs;
+	unsigned long		ale_ageout;	/* in secs */
+	unsigned long		ale_entries;
+	unsigned long		ale_ports;
+};
+
+struct cpsw_ale {
+	struct cpsw_ale_params	params;
+	struct timer_list	timer;
+	unsigned long		ageout;
+};
+
+enum cpsw_ale_control {
+	/* global */
+	ALE_ENABLE,
+	ALE_CLEAR,
+	ALE_AGEOUT,
+	ALE_VLAN_NOLEARN,
+	ALE_NO_PORT_VLAN,
+	ALE_OUI_DENY,
+	ALE_BYPASS,
+	ALE_RATE_LIMIT_TX,
+	ALE_VLAN_AWARE,
+	ALE_AUTH_ENABLE,
+	ALE_RATE_LIMIT,
+	/* port controls */
+	ALE_PORT_STATE,
+	ALE_PORT_DROP_UNTAGGED,
+	ALE_PORT_DROP_UNKNOWN_VLAN,
+	ALE_PORT_NOLEARN,
+	ALE_PORT_UNKNOWN_VLAN_MEMBER,
+	ALE_PORT_UNKNOWN_MCAST_FLOOD,
+	ALE_PORT_UNKNOWN_REG_MCAST_FLOOD,
+	ALE_PORT_UNTAGGED_EGRESS,
+	ALE_PORT_BCAST_LIMIT,
+	ALE_PORT_MCAST_LIMIT,
+	ALE_NUM_CONTROLS,
+};
+
+enum cpsw_ale_port_state {
+	ALE_PORT_STATE_DISABLE	= 0x00,
+	ALE_PORT_STATE_BLOCK	= 0x01,
+	ALE_PORT_STATE_LEARN	= 0x02,
+	ALE_PORT_STATE_FORWARD	= 0x03,
+};
+
+/* ALE unicast entry flags - passed into cpsw_ale_add_ucast() */
+#define ALE_SECURE			1
+#define ALE_BLOCKED			2
+
+#define ALE_MCAST_FWD			0
+#define ALE_MCAST_BLOCK_LEARN_FWD	1
+#define ALE_MCAST_FWD_LEARN		2
+#define ALE_MCAST_FWD_2			3
+
+struct cpsw_ale *cpsw_ale_create(struct cpsw_ale_params *params);
+int cpsw_ale_destroy(struct cpsw_ale *ale);
+
+void cpsw_ale_start(struct cpsw_ale *ale);
+void cpsw_ale_stop(struct cpsw_ale *ale);
+
+int cpsw_ale_set_ageout(struct cpsw_ale *ale, int ageout);
+int cpsw_ale_flush(struct cpsw_ale *ale, int port_mask);
+int cpsw_ale_add_ucast(struct cpsw_ale *ale, u8 *addr, int port, int flags);
+int cpsw_ale_del_ucast(struct cpsw_ale *ale, u8 *addr, int port);
+int cpsw_ale_add_mcast(struct cpsw_ale *ale, u8 *addr, int port_mask,
+			int super, int mcast_state);
+int cpsw_ale_del_mcast(struct cpsw_ale *ale, u8 *addr, int port_mask);
+
+int cpsw_ale_control_get(struct cpsw_ale *ale, int port, int control);
+int cpsw_ale_control_set(struct cpsw_ale *ale, int port,
+			 int control, int value);
+
+#endif