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>

2 files changed, 734 insertions, 0 deletions

diff --git a/drivers/net/ethernet/ti/cpsw_ale.c b/drivers/net/ethernet/ti/cpsw_ale.c
new file mode 100644
index 000000000000..ca0d48a7e508
--- /dev/null
+++ b/drivers/net/ethernet/ti/cpsw_ale.c
@@ -0,0 +1,641 @@
+/*
+ * Texas Instruments 3-Port Ethernet Switch Address Lookup Engine
+ *
+ * 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.
+ */
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/stat.h>
+#include <linux/sysfs.h>
+
+#include "cpsw_ale.h"
+
+#define BITMASK(bits)		(BIT(bits) - 1)
+#define ALE_ENTRY_BITS		68
+#define ALE_ENTRY_WORDS	DIV_ROUND_UP(ALE_ENTRY_BITS, 32)
+
+#define ALE_VERSION_MAJOR(rev)	((rev >> 8) & 0xff)
+#define ALE_VERSION_MINOR(rev)	(rev & 0xff)
+
+/* ALE Registers */
+#define ALE_IDVER		0x00
+#define ALE_CONTROL		0x08
+#define ALE_PRESCALE		0x10
+#define ALE_UNKNOWNVLAN		0x18
+#define ALE_TABLE_CONTROL	0x20
+#define ALE_TABLE		0x34
+#define ALE_PORTCTL		0x40
+
+#define ALE_TABLE_WRITE		BIT(31)
+
+#define ALE_TYPE_FREE			0
+#define ALE_TYPE_ADDR			1
+#define ALE_TYPE_VLAN			2
+#define ALE_TYPE_VLAN_ADDR		3
+
+#define ALE_UCAST_PERSISTANT		0
+#define ALE_UCAST_UNTOUCHED		1
+#define ALE_UCAST_OUI			2
+#define ALE_UCAST_TOUCHED		3
+
+static inline int cpsw_ale_get_field(u32 *ale_entry, u32 start, u32 bits)
+{
+	int idx;
+
+	idx    = start / 32;
+	start -= idx * 32;
+	idx    = 2 - idx; /* flip */
+	return (ale_entry[idx] >> start) & BITMASK(bits);
+}
+
+static inline void cpsw_ale_set_field(u32 *ale_entry, u32 start, u32 bits,
+				      u32 value)
+{
+	int idx;
+
+	value &= BITMASK(bits);
+	idx    = start / 32;
+	start -= idx * 32;
+	idx    = 2 - idx; /* flip */
+	ale_entry[idx] &= ~(BITMASK(bits) << start);
+	ale_entry[idx] |=  (value << start);
+}
+
+#define DEFINE_ALE_FIELD(name, start, bits)				\
+static inline int cpsw_ale_get_##name(u32 *ale_entry)			\
+{									\
+	return cpsw_ale_get_field(ale_entry, start, bits);		\
+}									\
+static inline void cpsw_ale_set_##name(u32 *ale_entry, u32 value)	\
+{									\
+	cpsw_ale_set_field(ale_entry, start, bits, value);		\
+}
+
+DEFINE_ALE_FIELD(entry_type,		60,	2)
+DEFINE_ALE_FIELD(vlan_id,		48,	12)
+DEFINE_ALE_FIELD(mcast_state,		62,	2)
+DEFINE_ALE_FIELD(port_mask,		66,     3)
+DEFINE_ALE_FIELD(super,			65,	1)
+DEFINE_ALE_FIELD(ucast_type,		62,     2)
+DEFINE_ALE_FIELD(port_num,		66,     2)
+DEFINE_ALE_FIELD(blocked,		65,     1)
+DEFINE_ALE_FIELD(secure,		64,     1)
+DEFINE_ALE_FIELD(vlan_untag_force,	24,	3)
+DEFINE_ALE_FIELD(vlan_reg_mcast,	16,	3)
+DEFINE_ALE_FIELD(vlan_unreg_mcast,	8,	3)
+DEFINE_ALE_FIELD(vlan_member_list,	0,	3)
+DEFINE_ALE_FIELD(mcast,			40,	1)
+
+/* The MAC address field in the ALE entry cannot be macroized as above */
+static inline void cpsw_ale_get_addr(u32 *ale_entry, u8 *addr)
+{
+	int i;
+
+	for (i = 0; i < 6; i++)
+		addr[i] = cpsw_ale_get_field(ale_entry, 40 - 8*i, 8);
+}
+
+static inline void cpsw_ale_set_addr(u32 *ale_entry, u8 *addr)
+{
+	int i;
+
+	for (i = 0; i < 6; i++)
+		cpsw_ale_set_field(ale_entry, 40 - 8*i, 8, addr[i]);
+}
+
+static int cpsw_ale_read(struct cpsw_ale *ale, int idx, u32 *ale_entry)
+{
+	int i;
+
+	WARN_ON(idx > ale->params.ale_entries);
+
+	__raw_writel(idx, ale->params.ale_regs + ALE_TABLE_CONTROL);
+
+	for (i = 0; i < ALE_ENTRY_WORDS; i++)
+		ale_entry[i] = __raw_readl(ale->params.ale_regs +
+					   ALE_TABLE + 4 * i);
+
+	return idx;
+}
+
+static int cpsw_ale_write(struct cpsw_ale *ale, int idx, u32 *ale_entry)
+{
+	int i;
+
+	WARN_ON(idx > ale->params.ale_entries);
+
+	for (i = 0; i < ALE_ENTRY_WORDS; i++)
+		__raw_writel(ale_entry[i], ale->params.ale_regs +
+			     ALE_TABLE + 4 * i);
+
+	__raw_writel(idx | ALE_TABLE_WRITE, ale->params.ale_regs +
+		     ALE_TABLE_CONTROL);
+
+	return idx;
+}
+
+static int cpsw_ale_match_addr(struct cpsw_ale *ale, u8 *addr)
+{
+	u32 ale_entry[ALE_ENTRY_WORDS];
+	int type, idx;
+
+	for (idx = 0; idx < ale->params.ale_entries; idx++) {
+		u8 entry_addr[6];
+
+		cpsw_ale_read(ale, idx, ale_entry);
+		type = cpsw_ale_get_entry_type(ale_entry);
+		if (type != ALE_TYPE_ADDR && type != ALE_TYPE_VLAN_ADDR)
+			continue;
+		cpsw_ale_get_addr(ale_entry, entry_addr);
+		if (memcmp(entry_addr, addr, 6) == 0)
+			return idx;
+	}
+	return -ENOENT;
+}
+
+static int cpsw_ale_match_free(struct cpsw_ale *ale)
+{
+	u32 ale_entry[ALE_ENTRY_WORDS];
+	int type, idx;
+
+	for (idx = 0; idx < ale->params.ale_entries; idx++) {
+		cpsw_ale_read(ale, idx, ale_entry);
+		type = cpsw_ale_get_entry_type(ale_entry);
+		if (type == ALE_TYPE_FREE)
+			return idx;
+	}
+	return -ENOENT;
+}
+
+static int cpsw_ale_find_ageable(struct cpsw_ale *ale)
+{
+	u32 ale_entry[ALE_ENTRY_WORDS];
+	int type, idx;
+
+	for (idx = 0; idx < ale->params.ale_entries; idx++) {
+		cpsw_ale_read(ale, idx, ale_entry);
+		type = cpsw_ale_get_entry_type(ale_entry);
+		if (type != ALE_TYPE_ADDR && type != ALE_TYPE_VLAN_ADDR)
+			continue;
+		if (cpsw_ale_get_mcast(ale_entry))
+			continue;
+		type = cpsw_ale_get_ucast_type(ale_entry);
+		if (type != ALE_UCAST_PERSISTANT &&
+		    type != ALE_UCAST_OUI)
+			return idx;
+	}
+	return -ENOENT;
+}
+
+static void cpsw_ale_flush_mcast(struct cpsw_ale *ale, u32 *ale_entry,
+				 int port_mask)
+{
+	int mask;
+
+	mask = cpsw_ale_get_port_mask(ale_entry);
+	if ((mask & port_mask) == 0)
+		return; /* ports dont intersect, not interested */
+	mask &= ~port_mask;
+
+	/* free if only remaining port is host port */
+	if (mask == BIT(ale->params.ale_ports))
+		cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
+	else
+		cpsw_ale_set_port_mask(ale_entry, mask);
+}
+
+static void cpsw_ale_flush_ucast(struct cpsw_ale *ale, u32 *ale_entry,
+				 int port_mask)
+{
+	int port;
+
+	port = cpsw_ale_get_port_num(ale_entry);
+	if ((BIT(port) & port_mask) == 0)
+		return; /* ports dont intersect, not interested */
+	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
+}
+
+int cpsw_ale_flush(struct cpsw_ale *ale, int port_mask)
+{
+	u32 ale_entry[ALE_ENTRY_WORDS];
+	int ret, idx;
+
+	for (idx = 0; idx < ale->params.ale_entries; idx++) {
+		cpsw_ale_read(ale, idx, ale_entry);
+		ret = cpsw_ale_get_entry_type(ale_entry);
+		if (ret != ALE_TYPE_ADDR && ret != ALE_TYPE_VLAN_ADDR)
+			continue;
+
+		if (cpsw_ale_get_mcast(ale_entry))
+			cpsw_ale_flush_mcast(ale, ale_entry, port_mask);
+		else
+			cpsw_ale_flush_ucast(ale, ale_entry, port_mask);
+
+		cpsw_ale_write(ale, idx, ale_entry);
+	}
+	return 0;
+}
+
+int cpsw_ale_add_ucast(struct cpsw_ale *ale, u8 *addr, int port, int flags)
+{
+	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
+	int idx;
+
+	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_ADDR);
+	cpsw_ale_set_addr(ale_entry, addr);
+	cpsw_ale_set_ucast_type(ale_entry, ALE_UCAST_PERSISTANT);
+	cpsw_ale_set_secure(ale_entry, (flags & ALE_SECURE) ? 1 : 0);
+	cpsw_ale_set_blocked(ale_entry, (flags & ALE_BLOCKED) ? 1 : 0);
+	cpsw_ale_set_port_num(ale_entry, port);
+
+	idx = cpsw_ale_match_addr(ale, addr);
+	if (idx < 0)
+		idx = cpsw_ale_match_free(ale);
+	if (idx < 0)
+		idx = cpsw_ale_find_ageable(ale);
+	if (idx < 0)
+		return -ENOMEM;
+
+	cpsw_ale_write(ale, idx, ale_entry);
+	return 0;
+}
+
+int cpsw_ale_del_ucast(struct cpsw_ale *ale, u8 *addr, int port)
+{
+	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
+	int idx;
+
+	idx = cpsw_ale_match_addr(ale, addr);
+	if (idx < 0)
+		return -ENOENT;
+
+	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
+	cpsw_ale_write(ale, idx, ale_entry);
+	return 0;
+}
+
+int cpsw_ale_add_mcast(struct cpsw_ale *ale, u8 *addr, int port_mask,
+			int super, int mcast_state)
+{
+	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
+	int idx, mask;
+
+	idx = cpsw_ale_match_addr(ale, addr);
+	if (idx >= 0)
+		cpsw_ale_read(ale, idx, ale_entry);
+
+	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_ADDR);
+	cpsw_ale_set_addr(ale_entry, addr);
+	cpsw_ale_set_super(ale_entry, super);
+	cpsw_ale_set_mcast_state(ale_entry, mcast_state);
+
+	mask = cpsw_ale_get_port_mask(ale_entry);
+	port_mask |= mask;
+	cpsw_ale_set_port_mask(ale_entry, port_mask);
+
+	if (idx < 0)
+		idx = cpsw_ale_match_free(ale);
+	if (idx < 0)
+		idx = cpsw_ale_find_ageable(ale);
+	if (idx < 0)
+		return -ENOMEM;
+
+	cpsw_ale_write(ale, idx, ale_entry);
+	return 0;
+}
+
+int cpsw_ale_del_mcast(struct cpsw_ale *ale, u8 *addr, int port_mask)
+{
+	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
+	int idx;
+
+	idx = cpsw_ale_match_addr(ale, addr);
+	if (idx < 0)
+		return -EINVAL;
+
+	cpsw_ale_read(ale, idx, ale_entry);
+
+	if (port_mask)
+		cpsw_ale_set_port_mask(ale_entry, port_mask);
+	else
+		cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
+
+	cpsw_ale_write(ale, idx, ale_entry);
+	return 0;
+}
+
+struct ale_control_info {
+	const char	*name;
+	int		offset, port_offset;
+	int		shift, port_shift;
+	int		bits;
+};
+
+static const struct ale_control_info ale_controls[ALE_NUM_CONTROLS] = {
+	[ALE_ENABLE]		= {
+		.name		= "enable",
+		.offset		= ALE_CONTROL,
+		.port_offset	= 0,
+		.shift		= 31,
+		.port_shift	= 0,
+		.bits		= 1,
+	},
+	[ALE_CLEAR]		= {
+		.name		= "clear",
+		.offset		= ALE_CONTROL,
+		.port_offset	= 0,
+		.shift		= 30,
+		.port_shift	= 0,
+		.bits		= 1,
+	},
+	[ALE_AGEOUT]		= {
+		.name		= "ageout",
+		.offset		= ALE_CONTROL,
+		.port_offset	= 0,
+		.shift		= 29,
+		.port_shift	= 0,
+		.bits		= 1,
+	},
+	[ALE_VLAN_NOLEARN]	= {
+		.name		= "vlan_nolearn",
+		.offset		= ALE_CONTROL,
+		.port_offset	= 0,
+		.shift		= 7,
+		.port_shift	= 0,
+		.bits		= 1,
+	},
+	[ALE_NO_PORT_VLAN]	= {
+		.name		= "no_port_vlan",
+		.offset		= ALE_CONTROL,
+		.port_offset	= 0,
+		.shift		= 6,
+		.port_shift	= 0,
+		.bits		= 1,
+	},
+	[ALE_OUI_DENY]		= {
+		.name		= "oui_deny",
+		.offset		= ALE_CONTROL,
+		.port_offset	= 0,
+		.shift		= 5,
+		.port_shift	= 0,
+		.bits		= 1,
+	},
+	[ALE_BYPASS]		= {
+		.name		= "bypass",
+		.offset		= ALE_CONTROL,
+		.port_offset	= 0,
+		.shift		= 4,
+		.port_shift	= 0,
+		.bits		= 1,
+	},
+	[ALE_RATE_LIMIT_TX]	= {
+		.name		= "rate_limit_tx",
+		.offset		= ALE_CONTROL,
+		.port_offset	= 0,
+		.shift		= 3,
+		.port_shift	= 0,
+		.bits		= 1,
+	},
+	[ALE_VLAN_AWARE]	= {
+		.name		= "vlan_aware",
+		.offset		= ALE_CONTROL,
+		.port_offset	= 0,
+		.shift		= 2,
+		.port_shift	= 0,
+		.bits		= 1,
+	},
+	[ALE_AUTH_ENABLE]	= {
+		.name		= "auth_enable",
+		.offset		= ALE_CONTROL,
+		.port_offset	= 0,
+		.shift		= 1,
+		.port_shift	= 0,
+		.bits		= 1,
+	},
+	[ALE_RATE_LIMIT]	= {
+		.name		= "rate_limit",
+		.offset		= ALE_CONTROL,
+		.port_offset	= 0,
+		.shift		= 0,
+		.port_shift	= 0,
+		.bits		= 1,
+	},
+	[ALE_PORT_STATE]	= {
+		.name		= "port_state",
+		.offset		= ALE_PORTCTL,
+		.port_offset	= 4,
+		.shift		= 0,
+		.port_shift	= 0,
+		.bits		= 2,
+	},
+	[ALE_PORT_DROP_UNTAGGED] = {
+		.name		= "drop_untagged",
+		.offset		= ALE_PORTCTL,
+		.port_offset	= 4,
+		.shift		= 2,
+		.port_shift	= 0,
+		.bits		= 1,
+	},
+	[ALE_PORT_DROP_UNKNOWN_VLAN] = {
+		.name		= "drop_unknown",
+		.offset		= ALE_PORTCTL,
+		.port_offset	= 4,
+		.shift		= 3,
+		.port_shift	= 0,
+		.bits		= 1,
+	},
+	[ALE_PORT_NOLEARN]	= {
+		.name		= "nolearn",
+		.offset		= ALE_PORTCTL,
+		.port_offset	= 4,
+		.shift		= 4,
+		.port_shift	= 0,
+		.bits		= 1,
+	},
+	[ALE_PORT_MCAST_LIMIT]	= {
+		.name		= "mcast_limit",
+		.offset		= ALE_PORTCTL,
+		.port_offset	= 4,
+		.shift		= 16,
+		.port_shift	= 0,
+		.bits		= 8,
+	},
+	[ALE_PORT_BCAST_LIMIT]	= {
+		.name		= "bcast_limit",
+		.offset		= ALE_PORTCTL,
+		.port_offset	= 4,
+		.shift		= 24,
+		.port_shift	= 0,
+		.bits		= 8,
+	},
+	[ALE_PORT_UNKNOWN_VLAN_MEMBER] = {
+		.name		= "unknown_vlan_member",
+		.offset		= ALE_UNKNOWNVLAN,
+		.port_offset	= 0,
+		.shift		= 0,
+		.port_shift	= 0,
+		.bits		= 6,
+	},
+	[ALE_PORT_UNKNOWN_MCAST_FLOOD] = {
+		.name		= "unknown_mcast_flood",
+		.offset		= ALE_UNKNOWNVLAN,
+		.port_offset	= 0,
+		.shift		= 8,
+		.port_shift	= 0,
+		.bits		= 6,
+	},
+	[ALE_PORT_UNKNOWN_REG_MCAST_FLOOD] = {
+		.name		= "unknown_reg_flood",
+		.offset		= ALE_UNKNOWNVLAN,
+		.port_offset	= 0,
+		.shift		= 16,
+		.port_shift	= 0,
+		.bits		= 6,
+	},
+	[ALE_PORT_UNTAGGED_EGRESS] = {
+		.name		= "untagged_egress",
+		.offset		= ALE_UNKNOWNVLAN,
+		.port_offset	= 0,
+		.shift		= 24,
+		.port_shift	= 0,
+		.bits		= 6,
+	},
+};
+
+int cpsw_ale_control_set(struct cpsw_ale *ale, int port, int control,
+			 int value)
+{
+	const struct ale_control_info *info;
+	int offset, shift;
+	u32 tmp, mask;
+
+	if (control < 0 || control >= ARRAY_SIZE(ale_controls))
+		return -EINVAL;
+
+	info = &ale_controls[control];
+	if (info->port_offset == 0 && info->port_shift == 0)
+		port = 0; /* global, port is a dont care */
+
+	if (port < 0 || port > ale->params.ale_ports)
+		return -EINVAL;
+
+	mask = BITMASK(info->bits);
+	if (value & ~mask)
+		return -EINVAL;
+
+	offset = info->offset + (port * info->port_offset);
+	shift  = info->shift  + (port * info->port_shift);
+
+	tmp = __raw_readl(ale->params.ale_regs + offset);
+	tmp = (tmp & ~(mask << shift)) | (value << shift);
+	__raw_writel(tmp, ale->params.ale_regs + offset);
+
+	return 0;
+}
+
+int cpsw_ale_control_get(struct cpsw_ale *ale, int port, int control)
+{
+	const struct ale_control_info *info;
+	int offset, shift;
+	u32 tmp;
+
+	if (control < 0 || control >= ARRAY_SIZE(ale_controls))
+		return -EINVAL;
+
+	info = &ale_controls[control];
+	if (info->port_offset == 0 && info->port_shift == 0)
+		port = 0; /* global, port is a dont care */
+
+	if (port < 0 || port > ale->params.ale_ports)
+		return -EINVAL;
+
+	offset = info->offset + (port * info->port_offset);
+	shift  = info->shift  + (port * info->port_shift);
+
+	tmp = __raw_readl(ale->params.ale_regs + offset) >> shift;
+	return tmp & BITMASK(info->bits);
+}
+
+static void cpsw_ale_timer(unsigned long arg)
+{
+	struct cpsw_ale *ale = (struct cpsw_ale *)arg;
+
+	cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);
+
+	if (ale->ageout) {
+		ale->timer.expires = jiffies + ale->ageout;
+		add_timer(&ale->timer);
+	}
+}
+
+int cpsw_ale_set_ageout(struct cpsw_ale *ale, int ageout)
+{
+	del_timer_sync(&ale->timer);
+	ale->ageout = ageout * HZ;
+	if (ale->ageout) {
+		ale->timer.expires = jiffies + ale->ageout;
+		add_timer(&ale->timer);
+	}
+	return 0;
+}
+
+void cpsw_ale_start(struct cpsw_ale *ale)
+{
+	u32 rev;
+
+	rev = __raw_readl(ale->params.ale_regs + ALE_IDVER);
+	dev_dbg(ale->params.dev, "initialized cpsw ale revision %d.%d\n",
+		ALE_VERSION_MAJOR(rev), ALE_VERSION_MINOR(rev));
+	cpsw_ale_control_set(ale, 0, ALE_ENABLE, 1);
+	cpsw_ale_control_set(ale, 0, ALE_CLEAR, 1);
+
+	init_timer(&ale->timer);
+	ale->timer.data	    = (unsigned long)ale;
+	ale->timer.function = cpsw_ale_timer;
+	if (ale->ageout) {
+		ale->timer.expires = jiffies + ale->ageout;
+		add_timer(&ale->timer);
+	}
+}
+
+void cpsw_ale_stop(struct cpsw_ale *ale)
+{
+	del_timer_sync(&ale->timer);
+}
+
+struct cpsw_ale *cpsw_ale_create(struct cpsw_ale_params *params)
+{
+	struct cpsw_ale *ale;
+
+	ale = kzalloc(sizeof(*ale), GFP_KERNEL);
+	if (!ale)
+		return NULL;
+
+	ale->params = *params;
+	ale->ageout = ale->params.ale_ageout * HZ;
+
+	return ale;
+}
+
+int cpsw_ale_destroy(struct cpsw_ale *ale)
+{
+	if (!ale)
+		return -EINVAL;
+	cpsw_ale_stop(ale);
+	cpsw_ale_control_set(ale, 0, ALE_ENABLE, 0);
+	kfree(ale);
+	return 0;
+}
diff --git a/drivers/net/ethernet/ti/cpsw_ale.h b/drivers/net/ethernet/ti/cpsw_ale.h
new file mode 100644
index 000000000000..a95b37beb02d
--- /dev/null
+++ b/drivers/net/ethernet/ti/cpsw_ale.h
@@ -0,0 +1,93 @@
+/*
+ * 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