drivers/net/ethernet/ti/cpsw_ale.c - kernel/msm-5.4 - Gitiles

 /*
  * 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 <linux/etherdevice.h>

 #include "cpsw_ale.h"

 #define BITMASK(bits)		(BIT(bits) - 1)

 #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;
 }

 int cpsw_ale_match_addr(struct cpsw_ale *ale, u8 *addr, u16 vid)
 {
 	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;
 		if (cpsw_ale_get_vlan_id(ale_entry) != vid)
 			continue;
 		cpsw_ale_get_addr(ale_entry, entry_addr);
 		if (ether_addr_equal(entry_addr, addr))
 			return idx;
 	}
 	return -ENOENT;
 }

 int cpsw_ale_match_vlan(struct cpsw_ale *ale, u16 vid)
 {
 	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_VLAN)
 			continue;
 		if (cpsw_ale_get_vlan_id(ale_entry) == vid)
 			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)
 		cpsw_ale_set_port_mask(ale_entry, mask);
 	else
 		cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
 }

 int cpsw_ale_flush_multicast(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)) {
 			u8 addr[6];

 			cpsw_ale_get_addr(ale_entry, addr);
 			if (!is_broadcast_ether_addr(addr))
 				cpsw_ale_flush_mcast(ale, ale_entry, port_mask);
 		}

 		cpsw_ale_write(ale, idx, ale_entry);
 	}
 	return 0;
 }

 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;
 }

 static inline void cpsw_ale_set_vlan_entry_type(u32 *ale_entry,
 						int flags, u16 vid)
 {
 	if (flags & ALE_VLAN) {
 		cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_VLAN_ADDR);
 		cpsw_ale_set_vlan_id(ale_entry, vid);
 	} else {
 		cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_ADDR);
 	}
 }

 int cpsw_ale_add_ucast(struct cpsw_ale *ale, u8 *addr, int port,
 		       int flags, u16 vid)
 {
 	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
 	int idx;

 	cpsw_ale_set_vlan_entry_type(ale_entry, flags, vid);

 	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, (flags & ALE_VLAN) ? vid : 0);
 	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,
 		       int flags, u16 vid)
 {
 	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
 	int idx;

 	idx = cpsw_ale_match_addr(ale, addr, (flags & ALE_VLAN) ? vid : 0);
 	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 flags, u16 vid, int mcast_state)
 {
 	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
 	int idx, mask;

 	idx = cpsw_ale_match_addr(ale, addr, (flags & ALE_VLAN) ? vid : 0);
 	if (idx >= 0)
 		cpsw_ale_read(ale, idx, ale_entry);

 	cpsw_ale_set_vlan_entry_type(ale_entry, flags, vid);

 	cpsw_ale_set_addr(ale_entry, addr);
 	cpsw_ale_set_super(ale_entry, (flags & ALE_BLOCKED) ? 1 : 0);
 	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,
 		       int flags, u16 vid)
 {
 	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
 	int idx;

 	idx = cpsw_ale_match_addr(ale, addr, (flags & ALE_VLAN) ? vid : 0);
 	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;
 }

 int cpsw_ale_add_vlan(struct cpsw_ale *ale, u16 vid, int port, int untag,
 		      int reg_mcast, int unreg_mcast)
 {
 	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
 	int idx;

 	idx = cpsw_ale_match_vlan(ale, vid);
 	if (idx >= 0)
 		cpsw_ale_read(ale, idx, ale_entry);

 	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_VLAN);
 	cpsw_ale_set_vlan_id(ale_entry, vid);

 	cpsw_ale_set_vlan_untag_force(ale_entry, untag);
 	cpsw_ale_set_vlan_reg_mcast(ale_entry, reg_mcast);
 	cpsw_ale_set_vlan_unreg_mcast(ale_entry, unreg_mcast);
 	cpsw_ale_set_vlan_member_list(ale_entry, port);

 	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_vlan(struct cpsw_ale *ale, u16 vid, int port_mask)
 {
 	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
 	int idx;

 	idx = cpsw_ale_match_vlan(ale, vid);
 	if (idx < 0)
 		return -ENOENT;

 	cpsw_ale_read(ale, idx, ale_entry);

 	if (port_mask)
 		cpsw_ale_set_vlan_member_list(ale_entry, port_mask);
 	else
 		cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);

 	cpsw_ale_write(ale, idx, ale_entry);
 	return 0;
 }

 void cpsw_ale_set_allmulti(struct cpsw_ale *ale, int allmulti)
 {
 	u32 ale_entry[ALE_ENTRY_WORDS];
 	int type, idx;
 	int unreg_mcast = 0;

 	/* Only bother doing the work if the setting is actually changing */
 	if (ale->allmulti == allmulti)
 		return;

 	/* Remember the new setting to check against next time */
 	ale->allmulti = allmulti;

 	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_VLAN)
 			continue;

 		unreg_mcast = cpsw_ale_get_vlan_unreg_mcast(ale_entry);
 		if (allmulti)
 			unreg_mcast |= 1;
 		else
 			unreg_mcast &= ~1;
 		cpsw_ale_set_vlan_unreg_mcast(ale_entry, unreg_mcast);
 		cpsw_ale_write(ale, idx, ale_entry);
 	}
 }

 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_P0_UNI_FLOOD]	= {
 		.name		= "port0_unicast_flood",
 		.offset		= ALE_CONTROL,
 		.port_offset	= 0,
 		.shift		= 8,
 		.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_NO_SA_UPDATE]	= {
 		.name		= "no_source_update",
 		.offset		= ALE_PORTCTL,
 		.port_offset	= 4,
 		.shift		= 5,
 		.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;
 }

 void cpsw_ale_dump(struct cpsw_ale *ale, u32 *data)
 {
 	int i;

 	for (i = 0; i < ale->params.ale_entries; i++) {
 		cpsw_ale_read(ale, i, data);
 		data += ALE_ENTRY_WORDS;
 	}
 }
	/*
	* 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 <linux/etherdevice.h>

	#include "cpsw_ale.h"

	#define BITMASK(bits) (BIT(bits) - 1)

	#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;
	}

	int cpsw_ale_match_addr(struct cpsw_ale ale, u8 addr, u16 vid)
	{
	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;
	if (cpsw_ale_get_vlan_id(ale_entry) != vid)
	continue;
	cpsw_ale_get_addr(ale_entry, entry_addr);
	if (ether_addr_equal(entry_addr, addr))
	return idx;
	}
	return -ENOENT;
	}

	int cpsw_ale_match_vlan(struct cpsw_ale *ale, u16 vid)
	{
	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_VLAN)
	continue;
	if (cpsw_ale_get_vlan_id(ale_entry) == vid)
	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)
	cpsw_ale_set_port_mask(ale_entry, mask);
	else
	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
	}

	int cpsw_ale_flush_multicast(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)) {
	u8 addr[6];

	cpsw_ale_get_addr(ale_entry, addr);
	if (!is_broadcast_ether_addr(addr))
	cpsw_ale_flush_mcast(ale, ale_entry, port_mask);
	}

	cpsw_ale_write(ale, idx, ale_entry);
	}
	return 0;
	}

	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;
	}

	static inline void cpsw_ale_set_vlan_entry_type(u32 *ale_entry,
	int flags, u16 vid)
	{
	if (flags & ALE_VLAN) {
	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_VLAN_ADDR);
	cpsw_ale_set_vlan_id(ale_entry, vid);
	} else {
	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_ADDR);
	}
	}

	int cpsw_ale_add_ucast(struct cpsw_ale ale, u8 addr, int port,
	int flags, u16 vid)
	{
	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
	int idx;

	cpsw_ale_set_vlan_entry_type(ale_entry, flags, vid);

	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, (flags & ALE_VLAN) ? vid : 0);
	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,
	int flags, u16 vid)
	{
	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
	int idx;

	idx = cpsw_ale_match_addr(ale, addr, (flags & ALE_VLAN) ? vid : 0);
	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 flags, u16 vid, int mcast_state)
	{
	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
	int idx, mask;

	idx = cpsw_ale_match_addr(ale, addr, (flags & ALE_VLAN) ? vid : 0);
	if (idx >= 0)
	cpsw_ale_read(ale, idx, ale_entry);

	cpsw_ale_set_vlan_entry_type(ale_entry, flags, vid);

	cpsw_ale_set_addr(ale_entry, addr);
	cpsw_ale_set_super(ale_entry, (flags & ALE_BLOCKED) ? 1 : 0);
	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,
	int flags, u16 vid)
	{
	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
	int idx;

	idx = cpsw_ale_match_addr(ale, addr, (flags & ALE_VLAN) ? vid : 0);
	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;
	}

	int cpsw_ale_add_vlan(struct cpsw_ale *ale, u16 vid, int port, int untag,
	int reg_mcast, int unreg_mcast)
	{
	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
	int idx;

	idx = cpsw_ale_match_vlan(ale, vid);
	if (idx >= 0)
	cpsw_ale_read(ale, idx, ale_entry);

	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_VLAN);
	cpsw_ale_set_vlan_id(ale_entry, vid);

	cpsw_ale_set_vlan_untag_force(ale_entry, untag);
	cpsw_ale_set_vlan_reg_mcast(ale_entry, reg_mcast);
	cpsw_ale_set_vlan_unreg_mcast(ale_entry, unreg_mcast);
	cpsw_ale_set_vlan_member_list(ale_entry, port);

	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_vlan(struct cpsw_ale *ale, u16 vid, int port_mask)
	{
	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
	int idx;

	idx = cpsw_ale_match_vlan(ale, vid);
	if (idx < 0)
	return -ENOENT;

	cpsw_ale_read(ale, idx, ale_entry);

	if (port_mask)
	cpsw_ale_set_vlan_member_list(ale_entry, port_mask);
	else
	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);

	cpsw_ale_write(ale, idx, ale_entry);
	return 0;
	}

	void cpsw_ale_set_allmulti(struct cpsw_ale *ale, int allmulti)
	{
	u32 ale_entry[ALE_ENTRY_WORDS];
	int type, idx;
	int unreg_mcast = 0;

	/* Only bother doing the work if the setting is actually changing */
	if (ale->allmulti == allmulti)
	return;

	/* Remember the new setting to check against next time */
	ale->allmulti = allmulti;

	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_VLAN)
	continue;

	unreg_mcast = cpsw_ale_get_vlan_unreg_mcast(ale_entry);
	if (allmulti)
	unreg_mcast \|= 1;
	else
	unreg_mcast &= ~1;
	cpsw_ale_set_vlan_unreg_mcast(ale_entry, unreg_mcast);
	cpsw_ale_write(ale, idx, ale_entry);
	}
	}

	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_P0_UNI_FLOOD] = {
	.name = "port0_unicast_flood",
	.offset = ALE_CONTROL,
	.port_offset = 0,
	.shift = 8,
	.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_NO_SA_UPDATE] = {
	.name = "no_source_update",
	.offset = ALE_PORTCTL,
	.port_offset = 4,
	.shift = 5,
	.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;
	}

	void cpsw_ale_dump(struct cpsw_ale ale, u32 data)
	{
	int i;

	for (i = 0; i < ale->params.ale_entries; i++) {
	cpsw_ale_read(ale, i, data);
	data += ALE_ENTRY_WORDS;
	}
	}