[linux-2.6-block.git] / drivers / net / ethernet / ti / cpsw_ale.c

/*
 * 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, int vid)
{
	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 vid passed is -1 then remove all multicast entry from
		 * the table irrespective of vlan id, if a valid vlan id is
		 * passed then remove only multicast added to that vlan id.
		 * if vlan id doesn't match then move on to next entry.
		 */
		if (vid != -1 && cpsw_ale_get_vlan_id(ale_entry) != vid)
			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_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;
	}
}
Commit	Line	Data
db82173f M	1	/*
	2	* Texas Instruments 3-Port Ethernet Switch Address Lookup Engine
	3	*
	4	* Copyright (C) 2012 Texas Instruments
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License as
	8	* published by the Free Software Foundation version 2.
	9	*
	10	* This program is distributed "as is" WITHOUT ANY WARRANTY of any
	11	* kind, whether express or implied; without even the implied warranty
	12	* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*/
	15	#include <linux/kernel.h>
	16	#include <linux/platform_device.h>
	17	#include <linux/seq_file.h>
	18	#include <linux/slab.h>
	19	#include <linux/err.h>
	20	#include <linux/io.h>
	21	#include <linux/stat.h>
	22	#include <linux/sysfs.h>
5c50a856	23	#include <linux/etherdevice.h>
db82173f M	24
	25	#include "cpsw_ale.h"
	26
	27	#define BITMASK(bits) (BIT(bits) - 1)
db82173f M	28
	29	#define ALE_VERSION_MAJOR(rev) ((rev >> 8) & 0xff)
	30	#define ALE_VERSION_MINOR(rev) (rev & 0xff)
	31
	32	/* ALE Registers */
	33	#define ALE_IDVER 0x00
	34	#define ALE_CONTROL 0x08
	35	#define ALE_PRESCALE 0x10
	36	#define ALE_UNKNOWNVLAN 0x18
	37	#define ALE_TABLE_CONTROL 0x20
	38	#define ALE_TABLE 0x34
	39	#define ALE_PORTCTL 0x40
	40
	41	#define ALE_TABLE_WRITE BIT(31)
	42
	43	#define ALE_TYPE_FREE 0
	44	#define ALE_TYPE_ADDR 1
	45	#define ALE_TYPE_VLAN 2
	46	#define ALE_TYPE_VLAN_ADDR 3
	47
	48	#define ALE_UCAST_PERSISTANT 0
	49	#define ALE_UCAST_UNTOUCHED 1
	50	#define ALE_UCAST_OUI 2
	51	#define ALE_UCAST_TOUCHED 3
	52
	53	static inline int cpsw_ale_get_field(u32 *ale_entry, u32 start, u32 bits)
	54	{
	55	int idx;
	56
	57	idx = start / 32;
	58	start -= idx * 32;
	59	idx = 2 - idx; /* flip */
	60	return (ale_entry[idx] >> start) & BITMASK(bits);
	61	}
	62
	63	static inline void cpsw_ale_set_field(u32 *ale_entry, u32 start, u32 bits,
	64	u32 value)
	65	{
	66	int idx;
	67
	68	value &= BITMASK(bits);
	69	idx = start / 32;
	70	start -= idx * 32;
	71	idx = 2 - idx; /* flip */
	72	ale_entry[idx] &= ~(BITMASK(bits) << start);
	73	ale_entry[idx] \|= (value << start);
	74	}
	75
	76	#define DEFINE_ALE_FIELD(name, start, bits) \
	77	static inline int cpsw_ale_get_##name(u32 *ale_entry) \
	78	{ \
	79	return cpsw_ale_get_field(ale_entry, start, bits); \
	80	} \
	81	static inline void cpsw_ale_set_##name(u32 *ale_entry, u32 value) \
	82	{ \
	83	cpsw_ale_set_field(ale_entry, start, bits, value); \
	84	}
	85
	86	DEFINE_ALE_FIELD(entry_type, 60, 2)
	87	DEFINE_ALE_FIELD(vlan_id, 48, 12)
	88	DEFINE_ALE_FIELD(mcast_state, 62, 2)
	89	DEFINE_ALE_FIELD(port_mask, 66, 3)
	90	DEFINE_ALE_FIELD(super, 65, 1)
	91	DEFINE_ALE_FIELD(ucast_type, 62, 2)
92	DEFINE_ALE_FIELD(port_num, 66, 2)
93	DEFINE_ALE_FIELD(blocked, 65, 1)
94	DEFINE_ALE_FIELD(secure, 64, 1)
95	DEFINE_ALE_FIELD(vlan_untag_force, 24, 3)
96	DEFINE_ALE_FIELD(vlan_reg_mcast, 16, 3)
97	DEFINE_ALE_FIELD(vlan_unreg_mcast, 8, 3)
98	DEFINE_ALE_FIELD(vlan_member_list, 0, 3)
99	DEFINE_ALE_FIELD(mcast, 40, 1)
100
101	/* The MAC address field in the ALE entry cannot be macroized as above */
102	static inline void cpsw_ale_get_addr(u32 ale_entry, u8 addr)
103	{
104	int i;
105
106	for (i = 0; i < 6; i++)
107	addr[i] = cpsw_ale_get_field(ale_entry, 40 - 8*i, 8);
108	}
109
110	static inline void cpsw_ale_set_addr(u32 ale_entry, u8 addr)
111	{
112	int i;
113
114	for (i = 0; i < 6; i++)
115	cpsw_ale_set_field(ale_entry, 40 - 8*i, 8, addr[i]);
116	}
117
118	static int cpsw_ale_read(struct cpsw_ale ale, int idx, u32 ale_entry)
119	{
120	int i;
121
122	WARN_ON(idx > ale->params.ale_entries);
123
124	__raw_writel(idx, ale->params.ale_regs + ALE_TABLE_CONTROL);
125
126	for (i = 0; i < ALE_ENTRY_WORDS; i++)
127	ale_entry[i] = __raw_readl(ale->params.ale_regs +
128	ALE_TABLE + 4 * i);
129
130	return idx;
131	}
132
133	static int cpsw_ale_write(struct cpsw_ale ale, int idx, u32 ale_entry)
134	{
135	int i;
136
137	WARN_ON(idx > ale->params.ale_entries);
138
139	for (i = 0; i < ALE_ENTRY_WORDS; i++)
140	__raw_writel(ale_entry[i], ale->params.ale_regs +
141	ALE_TABLE + 4 * i);
142
143	__raw_writel(idx \| ALE_TABLE_WRITE, ale->params.ale_regs +
144	ALE_TABLE_CONTROL);
145
146	return idx;
147	}
148
e11b220f	149	int cpsw_ale_match_addr(struct cpsw_ale ale, u8 addr, u16 vid)
db82173f M	150	{
	151	u32 ale_entry[ALE_ENTRY_WORDS];
	152	int type, idx;
	153
	154	for (idx = 0; idx < ale->params.ale_entries; idx++) {
	155	u8 entry_addr[6];
	156
	157	cpsw_ale_read(ale, idx, ale_entry);
	158	type = cpsw_ale_get_entry_type(ale_entry);
	159	if (type != ALE_TYPE_ADDR && type != ALE_TYPE_VLAN_ADDR)
	160	continue;
e11b220f M	161	if (cpsw_ale_get_vlan_id(ale_entry) != vid)
e11b220f M	162	continue;
db82173f	163	cpsw_ale_get_addr(ale_entry, entry_addr);
d9f394fe	164	if (ether_addr_equal(entry_addr, addr))
db82173f M	165	return idx;
	166	}
	167	return -ENOENT;
	168	}
	169
e11b220f M	170	int cpsw_ale_match_vlan(struct cpsw_ale *ale, u16 vid)
	171	{
	172	u32 ale_entry[ALE_ENTRY_WORDS];
	173	int type, idx;
	174
	175	for (idx = 0; idx < ale->params.ale_entries; idx++) {
	176	cpsw_ale_read(ale, idx, ale_entry);
	177	type = cpsw_ale_get_entry_type(ale_entry);
	178	if (type != ALE_TYPE_VLAN)
	179	continue;
	180	if (cpsw_ale_get_vlan_id(ale_entry) == vid)
	181	return idx;
	182	}
	183	return -ENOENT;
	184	}
	185
db82173f M	186	static int cpsw_ale_match_free(struct cpsw_ale *ale)
	187	{
	188	u32 ale_entry[ALE_ENTRY_WORDS];
	189	int type, idx;
	190
	191	for (idx = 0; idx < ale->params.ale_entries; idx++) {
	192	cpsw_ale_read(ale, idx, ale_entry);
	193	type = cpsw_ale_get_entry_type(ale_entry);
	194	if (type == ALE_TYPE_FREE)
	195	return idx;
	196	}
	197	return -ENOENT;
	198	}
	199
	200	static int cpsw_ale_find_ageable(struct cpsw_ale *ale)
	201	{
	202	u32 ale_entry[ALE_ENTRY_WORDS];
	203	int type, idx;
	204
	205	for (idx = 0; idx < ale->params.ale_entries; idx++) {
	206	cpsw_ale_read(ale, idx, ale_entry);
	207	type = cpsw_ale_get_entry_type(ale_entry);
	208	if (type != ALE_TYPE_ADDR && type != ALE_TYPE_VLAN_ADDR)
	209	continue;
	210	if (cpsw_ale_get_mcast(ale_entry))
	211	continue;
	212	type = cpsw_ale_get_ucast_type(ale_entry);
	213	if (type != ALE_UCAST_PERSISTANT &&
	214	type != ALE_UCAST_OUI)
	215	return idx;
	216	}
	217	return -ENOENT;
	218	}
	219
	220	static void cpsw_ale_flush_mcast(struct cpsw_ale ale, u32 ale_entry,
	221	int port_mask)
	222	{
	223	int mask;
	224
	225	mask = cpsw_ale_get_port_mask(ale_entry);
	226	if ((mask & port_mask) == 0)
	227	return; /* ports dont intersect, not interested */
	228	mask &= ~port_mask;
	229
	230	/* free if only remaining port is host port */
5c50a856	231	if (mask)
db82173f	232	cpsw_ale_set_port_mask(ale_entry, mask);
5c50a856 M	233	else
	234	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
	235	}
	236
25906052	237	int cpsw_ale_flush_multicast(struct cpsw_ale *ale, int port_mask, int vid)
5c50a856 M	238	{
	239	u32 ale_entry[ALE_ENTRY_WORDS];
	240	int ret, idx;
	241
	242	for (idx = 0; idx < ale->params.ale_entries; idx++) {
	243	cpsw_ale_read(ale, idx, ale_entry);
	244	ret = cpsw_ale_get_entry_type(ale_entry);
	245	if (ret != ALE_TYPE_ADDR && ret != ALE_TYPE_VLAN_ADDR)
	246	continue;
	247
25906052 M	248	/* if vid passed is -1 then remove all multicast entry from
	249	* the table irrespective of vlan id, if a valid vlan id is
	250	* passed then remove only multicast added to that vlan id.
	251	* if vlan id doesn't match then move on to next entry.
	252	*/
	253	if (vid != -1 && cpsw_ale_get_vlan_id(ale_entry) != vid)
	254	continue;
	255
5c50a856 M	256	if (cpsw_ale_get_mcast(ale_entry)) {
	257	u8 addr[6];
	258
	259	cpsw_ale_get_addr(ale_entry, addr);
	260	if (!is_broadcast_ether_addr(addr))
	261	cpsw_ale_flush_mcast(ale, ale_entry, port_mask);
	262	}
	263
	264	cpsw_ale_write(ale, idx, ale_entry);
	265	}
	266	return 0;
db82173f M	267	}
	268
	269	static void cpsw_ale_flush_ucast(struct cpsw_ale ale, u32 ale_entry,
	270	int port_mask)
	271	{
	272	int port;
	273
	274	port = cpsw_ale_get_port_num(ale_entry);
	275	if ((BIT(port) & port_mask) == 0)
	276	return; /* ports dont intersect, not interested */
	277	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
	278	}
	279
	280	int cpsw_ale_flush(struct cpsw_ale *ale, int port_mask)
	281	{
	282	u32 ale_entry[ALE_ENTRY_WORDS];
	283	int ret, idx;
	284
	285	for (idx = 0; idx < ale->params.ale_entries; idx++) {
	286	cpsw_ale_read(ale, idx, ale_entry);
	287	ret = cpsw_ale_get_entry_type(ale_entry);
	288	if (ret != ALE_TYPE_ADDR && ret != ALE_TYPE_VLAN_ADDR)
	289	continue;
	290
	291	if (cpsw_ale_get_mcast(ale_entry))
	292	cpsw_ale_flush_mcast(ale, ale_entry, port_mask);
	293	else
	294	cpsw_ale_flush_ucast(ale, ale_entry, port_mask);
	295
	296	cpsw_ale_write(ale, idx, ale_entry);
	297	}
	298	return 0;
	299	}
	300
e11b220f M	301	static inline void cpsw_ale_set_vlan_entry_type(u32 *ale_entry,
	302	int flags, u16 vid)
	303	{
	304	if (flags & ALE_VLAN) {
	305	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_VLAN_ADDR);
	306	cpsw_ale_set_vlan_id(ale_entry, vid);
	307	} else {
	308	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_ADDR);
	309	}
	310	}
	311
	312	int cpsw_ale_add_ucast(struct cpsw_ale ale, u8 addr, int port,
	313	int flags, u16 vid)
db82173f M	314	{
	315	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
	316	int idx;
	317
e11b220f M	318	cpsw_ale_set_vlan_entry_type(ale_entry, flags, vid);
e11b220f M	319
db82173f M	320	cpsw_ale_set_addr(ale_entry, addr);
	321	cpsw_ale_set_ucast_type(ale_entry, ALE_UCAST_PERSISTANT);
	322	cpsw_ale_set_secure(ale_entry, (flags & ALE_SECURE) ? 1 : 0);
	323	cpsw_ale_set_blocked(ale_entry, (flags & ALE_BLOCKED) ? 1 : 0);
	324	cpsw_ale_set_port_num(ale_entry, port);
	325
e11b220f	326	idx = cpsw_ale_match_addr(ale, addr, (flags & ALE_VLAN) ? vid : 0);
db82173f M	327	if (idx < 0)
	328	idx = cpsw_ale_match_free(ale);
	329	if (idx < 0)
	330	idx = cpsw_ale_find_ageable(ale);
	331	if (idx < 0)
	332	return -ENOMEM;
	333
	334	cpsw_ale_write(ale, idx, ale_entry);
	335	return 0;
	336	}
	337
e11b220f M	338	int cpsw_ale_del_ucast(struct cpsw_ale ale, u8 addr, int port,
e11b220f M	339	int flags, u16 vid)
db82173f M	340	{
	341	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
	342	int idx;
	343
e11b220f	344	idx = cpsw_ale_match_addr(ale, addr, (flags & ALE_VLAN) ? vid : 0);
db82173f M	345	if (idx < 0)
	346	return -ENOENT;
	347
	348	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
	349	cpsw_ale_write(ale, idx, ale_entry);
	350	return 0;
	351	}
	352
	353	int cpsw_ale_add_mcast(struct cpsw_ale ale, u8 addr, int port_mask,
e11b220f	354	int flags, u16 vid, int mcast_state)
db82173f M	355	{
	356	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
	357	int idx, mask;
	358
e11b220f	359	idx = cpsw_ale_match_addr(ale, addr, (flags & ALE_VLAN) ? vid : 0);
db82173f M	360	if (idx >= 0)
	361	cpsw_ale_read(ale, idx, ale_entry);
	362
e11b220f M	363	cpsw_ale_set_vlan_entry_type(ale_entry, flags, vid);
e11b220f M	364
db82173f	365	cpsw_ale_set_addr(ale_entry, addr);
e11b220f	366	cpsw_ale_set_super(ale_entry, (flags & ALE_BLOCKED) ? 1 : 0);
db82173f M	367	cpsw_ale_set_mcast_state(ale_entry, mcast_state);
	368
	369	mask = cpsw_ale_get_port_mask(ale_entry);
	370	port_mask \|= mask;
	371	cpsw_ale_set_port_mask(ale_entry, port_mask);
	372
	373	if (idx < 0)
	374	idx = cpsw_ale_match_free(ale);
	375	if (idx < 0)
	376	idx = cpsw_ale_find_ageable(ale);
	377	if (idx < 0)
	378	return -ENOMEM;
	379
	380	cpsw_ale_write(ale, idx, ale_entry);
	381	return 0;
	382	}
	383
e11b220f M	384	int cpsw_ale_del_mcast(struct cpsw_ale ale, u8 addr, int port_mask,
e11b220f M	385	int flags, u16 vid)
db82173f M	386	{
	387	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
	388	int idx;
	389
e11b220f	390	idx = cpsw_ale_match_addr(ale, addr, (flags & ALE_VLAN) ? vid : 0);
db82173f M	391	if (idx < 0)
	392	return -EINVAL;
	393
	394	cpsw_ale_read(ale, idx, ale_entry);
	395
	396	if (port_mask)
	397	cpsw_ale_set_port_mask(ale_entry, port_mask);
	398	else
	399	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
	400
	401	cpsw_ale_write(ale, idx, ale_entry);
	402	return 0;
	403	}
	404
e11b220f M	405	int cpsw_ale_add_vlan(struct cpsw_ale *ale, u16 vid, int port, int untag,
	406	int reg_mcast, int unreg_mcast)
	407	{
	408	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
	409	int idx;
	410
	411	idx = cpsw_ale_match_vlan(ale, vid);
	412	if (idx >= 0)
	413	cpsw_ale_read(ale, idx, ale_entry);
	414
	415	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_VLAN);
	416	cpsw_ale_set_vlan_id(ale_entry, vid);
	417
	418	cpsw_ale_set_vlan_untag_force(ale_entry, untag);
	419	cpsw_ale_set_vlan_reg_mcast(ale_entry, reg_mcast);
	420	cpsw_ale_set_vlan_unreg_mcast(ale_entry, unreg_mcast);
	421	cpsw_ale_set_vlan_member_list(ale_entry, port);
	422
	423	if (idx < 0)
	424	idx = cpsw_ale_match_free(ale);
	425	if (idx < 0)
	426	idx = cpsw_ale_find_ageable(ale);
	427	if (idx < 0)
	428	return -ENOMEM;
	429
	430	cpsw_ale_write(ale, idx, ale_entry);
	431	return 0;
	432	}
	433
	434	int cpsw_ale_del_vlan(struct cpsw_ale *ale, u16 vid, int port_mask)
	435	{
	436	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
	437	int idx;
	438
	439	idx = cpsw_ale_match_vlan(ale, vid);
	440	if (idx < 0)
	441	return -ENOENT;
	442
	443	cpsw_ale_read(ale, idx, ale_entry);
	444
	445	if (port_mask)
	446	cpsw_ale_set_vlan_member_list(ale_entry, port_mask);
	447	else
	448	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
	449
	450	cpsw_ale_write(ale, idx, ale_entry);
	451	return 0;
	452	}
	453
1e5c4bc4 LS	454	void cpsw_ale_set_allmulti(struct cpsw_ale *ale, int allmulti)
	455	{
	456	u32 ale_entry[ALE_ENTRY_WORDS];
	457	int type, idx;
	458	int unreg_mcast = 0;
	459
	460	/* Only bother doing the work if the setting is actually changing */
	461	if (ale->allmulti == allmulti)
	462	return;
	463
	464	/* Remember the new setting to check against next time */
	465	ale->allmulti = allmulti;
	466
	467	for (idx = 0; idx < ale->params.ale_entries; idx++) {
	468	cpsw_ale_read(ale, idx, ale_entry);
	469	type = cpsw_ale_get_entry_type(ale_entry);
	470	if (type != ALE_TYPE_VLAN)
	471	continue;
	472
	473	unreg_mcast = cpsw_ale_get_vlan_unreg_mcast(ale_entry);
	474	if (allmulti)
	475	unreg_mcast \|= 1;
	476	else
	477	unreg_mcast &= ~1;
	478	cpsw_ale_set_vlan_unreg_mcast(ale_entry, unreg_mcast);
	479	cpsw_ale_write(ale, idx, ale_entry);
	480	}
	481	}
	482
db82173f M	483	struct ale_control_info {
	484	const char *name;
	485	int offset, port_offset;
	486	int shift, port_shift;
	487	int bits;
	488	};
	489
	490	static const struct ale_control_info ale_controls[ALE_NUM_CONTROLS] = {
	491	[ALE_ENABLE] = {
	492	.name = "enable",
	493	.offset = ALE_CONTROL,
	494	.port_offset = 0,
	495	.shift = 31,
	496	.port_shift = 0,
	497	.bits = 1,
	498	},
	499	[ALE_CLEAR] = {
	500	.name = "clear",
	501	.offset = ALE_CONTROL,
	502	.port_offset = 0,
	503	.shift = 30,
	504	.port_shift = 0,
	505	.bits = 1,
	506	},
	507	[ALE_AGEOUT] = {
	508	.name = "ageout",
	509	.offset = ALE_CONTROL,
	510	.port_offset = 0,
	511	.shift = 29,
	512	.port_shift = 0,
	513	.bits = 1,
	514	},
0cd8f9cc M	515	[ALE_P0_UNI_FLOOD] = {
	516	.name = "port0_unicast_flood",
	517	.offset = ALE_CONTROL,
	518	.port_offset = 0,
	519	.shift = 8,
	520	.port_shift = 0,
	521	.bits = 1,
	522	},
db82173f M	523	[ALE_VLAN_NOLEARN] = {
	524	.name = "vlan_nolearn",
	525	.offset = ALE_CONTROL,
	526	.port_offset = 0,
	527	.shift = 7,
	528	.port_shift = 0,
	529	.bits = 1,
	530	},
	531	[ALE_NO_PORT_VLAN] = {
	532	.name = "no_port_vlan",
	533	.offset = ALE_CONTROL,
	534	.port_offset = 0,
	535	.shift = 6,
	536	.port_shift = 0,
	537	.bits = 1,
	538	},
	539	[ALE_OUI_DENY] = {
	540	.name = "oui_deny",
	541	.offset = ALE_CONTROL,
	542	.port_offset = 0,
	543	.shift = 5,
	544	.port_shift = 0,
	545	.bits = 1,
	546	},
	547	[ALE_BYPASS] = {
	548	.name = "bypass",
	549	.offset = ALE_CONTROL,
	550	.port_offset = 0,
	551	.shift = 4,
	552	.port_shift = 0,
	553	.bits = 1,
	554	},
	555	[ALE_RATE_LIMIT_TX] = {
	556	.name = "rate_limit_tx",
	557	.offset = ALE_CONTROL,
	558	.port_offset = 0,
	559	.shift = 3,
	560	.port_shift = 0,
	561	.bits = 1,
	562	},
	563	[ALE_VLAN_AWARE] = {
	564	.name = "vlan_aware",
	565	.offset = ALE_CONTROL,
	566	.port_offset = 0,
	567	.shift = 2,
	568	.port_shift = 0,
	569	.bits = 1,
	570	},
	571	[ALE_AUTH_ENABLE] = {
	572	.name = "auth_enable",
	573	.offset = ALE_CONTROL,
	574	.port_offset = 0,
	575	.shift = 1,
	576	.port_shift = 0,
	577	.bits = 1,
	578	},
	579	[ALE_RATE_LIMIT] = {
	580	.name = "rate_limit",
	581	.offset = ALE_CONTROL,
	582	.port_offset = 0,
	583	.shift = 0,
	584	.port_shift = 0,
	585	.bits = 1,
	586	},
587	[ALE_PORT_STATE] = {
588	.name = "port_state",
589	.offset = ALE_PORTCTL,
590	.port_offset = 4,
591	.shift = 0,
592	.port_shift = 0,
593	.bits = 2,
594	},
595	[ALE_PORT_DROP_UNTAGGED] = {
596	.name = "drop_untagged",
597	.offset = ALE_PORTCTL,
598	.port_offset = 4,
599	.shift = 2,
600	.port_shift = 0,
601	.bits = 1,
602	},
603	[ALE_PORT_DROP_UNKNOWN_VLAN] = {
604	.name = "drop_unknown",
605	.offset = ALE_PORTCTL,
606	.port_offset = 4,
607	.shift = 3,
608	.port_shift = 0,
609	.bits = 1,
610	},
611	[ALE_PORT_NOLEARN] = {
612	.name = "nolearn",
613	.offset = ALE_PORTCTL,
614	.port_offset = 4,
615	.shift = 4,
616	.port_shift = 0,
617	.bits = 1,
618	},
0cd8f9cc M	619	[ALE_PORT_NO_SA_UPDATE] = {
	620	.name = "no_source_update",
	621	.offset = ALE_PORTCTL,
	622	.port_offset = 4,
	623	.shift = 5,
	624	.port_shift = 0,
	625	.bits = 1,
	626	},
db82173f M	627	[ALE_PORT_MCAST_LIMIT] = {
	628	.name = "mcast_limit",
	629	.offset = ALE_PORTCTL,
	630	.port_offset = 4,
	631	.shift = 16,
	632	.port_shift = 0,
	633	.bits = 8,
	634	},
	635	[ALE_PORT_BCAST_LIMIT] = {
	636	.name = "bcast_limit",
	637	.offset = ALE_PORTCTL,
	638	.port_offset = 4,
	639	.shift = 24,
	640	.port_shift = 0,
	641	.bits = 8,
	642	},
	643	[ALE_PORT_UNKNOWN_VLAN_MEMBER] = {
	644	.name = "unknown_vlan_member",
	645	.offset = ALE_UNKNOWNVLAN,
	646	.port_offset = 0,
	647	.shift = 0,
	648	.port_shift = 0,
	649	.bits = 6,
	650	},
	651	[ALE_PORT_UNKNOWN_MCAST_FLOOD] = {
	652	.name = "unknown_mcast_flood",
	653	.offset = ALE_UNKNOWNVLAN,
	654	.port_offset = 0,
	655	.shift = 8,
	656	.port_shift = 0,
	657	.bits = 6,
	658	},
	659	[ALE_PORT_UNKNOWN_REG_MCAST_FLOOD] = {
	660	.name = "unknown_reg_flood",
	661	.offset = ALE_UNKNOWNVLAN,
	662	.port_offset = 0,
	663	.shift = 16,
	664	.port_shift = 0,
	665	.bits = 6,
	666	},
	667	[ALE_PORT_UNTAGGED_EGRESS] = {
	668	.name = "untagged_egress",
	669	.offset = ALE_UNKNOWNVLAN,
	670	.port_offset = 0,
	671	.shift = 24,
	672	.port_shift = 0,
	673	.bits = 6,
	674	},
	675	};
	676
	677	int cpsw_ale_control_set(struct cpsw_ale *ale, int port, int control,
	678	int value)
	679	{
	680	const struct ale_control_info *info;
	681	int offset, shift;
	682	u32 tmp, mask;
	683
	684	if (control < 0 \|\| control >= ARRAY_SIZE(ale_controls))
	685	return -EINVAL;
	686
	687	info = &ale_controls[control];
	688	if (info->port_offset == 0 && info->port_shift == 0)
	689	port = 0; /* global, port is a dont care */
	690
691	if (port < 0 \|\| port > ale->params.ale_ports)
692	return -EINVAL;
693
694	mask = BITMASK(info->bits);
695	if (value & ~mask)
696	return -EINVAL;
697
698	offset = info->offset + (port * info->port_offset);
699	shift = info->shift + (port * info->port_shift);
700
701	tmp = __raw_readl(ale->params.ale_regs + offset);
702	tmp = (tmp & ~(mask << shift)) \| (value << shift);
703	__raw_writel(tmp, ale->params.ale_regs + offset);
704
705	return 0;
706	}
707
708	int cpsw_ale_control_get(struct cpsw_ale *ale, int port, int control)
709	{
710	const struct ale_control_info *info;
711	int offset, shift;
712	u32 tmp;
713
714	if (control < 0 \|\| control >= ARRAY_SIZE(ale_controls))
715	return -EINVAL;
716
717	info = &ale_controls[control];
718	if (info->port_offset == 0 && info->port_shift == 0)
719	port = 0; /* global, port is a dont care */
720
721	if (port < 0 \|\| port > ale->params.ale_ports)
722	return -EINVAL;
723
724	offset = info->offset + (port * info->port_offset);
725	shift = info->shift + (port * info->port_shift);
726
727	tmp = __raw_readl(ale->params.ale_regs + offset) >> shift;
728	return tmp & BITMASK(info->bits);
729	}
730
731	static void cpsw_ale_timer(unsigned long arg)
732	{
733	struct cpsw_ale ale = (struct cpsw_ale )arg;
734
735	cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);
736
737	if (ale->ageout) {
738	ale->timer.expires = jiffies + ale->ageout;
739	add_timer(&ale->timer);
740	}
741	}
742
743	int cpsw_ale_set_ageout(struct cpsw_ale *ale, int ageout)
744	{
745	del_timer_sync(&ale->timer);
746	ale->ageout = ageout * HZ;
747	if (ale->ageout) {
748	ale->timer.expires = jiffies + ale->ageout;
749	add_timer(&ale->timer);
750	}
751	return 0;
752	}
753
754	void cpsw_ale_start(struct cpsw_ale *ale)
755	{
756	u32 rev;
757
758	rev = __raw_readl(ale->params.ale_regs + ALE_IDVER);
759	dev_dbg(ale->params.dev, "initialized cpsw ale revision %d.%d\n",
760	ALE_VERSION_MAJOR(rev), ALE_VERSION_MINOR(rev));
761	cpsw_ale_control_set(ale, 0, ALE_ENABLE, 1);
762	cpsw_ale_control_set(ale, 0, ALE_CLEAR, 1);
763
764	init_timer(&ale->timer);
765	ale->timer.data = (unsigned long)ale;
766	ale->timer.function = cpsw_ale_timer;
767	if (ale->ageout) {
768	ale->timer.expires = jiffies + ale->ageout;
769	add_timer(&ale->timer);
770	}
771	}
772
773	void cpsw_ale_stop(struct cpsw_ale *ale)
774	{
775	del_timer_sync(&ale->timer);
776	}
777
778	struct cpsw_ale cpsw_ale_create(struct cpsw_ale_params params)
779	{
780	struct cpsw_ale *ale;
781
782	ale = kzalloc(sizeof(*ale), GFP_KERNEL);
783	if (!ale)
784	return NULL;
785
786	ale->params = *params;
787	ale->ageout = ale->params.ale_ageout * HZ;
788
789	return ale;
790	}
791
792	int cpsw_ale_destroy(struct cpsw_ale *ale)
793	{
794	if (!ale)
795	return -EINVAL;
db82173f M	796	cpsw_ale_control_set(ale, 0, ALE_ENABLE, 0);
	797	kfree(ale);
	798	return 0;
	799	}
52c4f0ec M	800
	801	void cpsw_ale_dump(struct cpsw_ale ale, u32 data)
	802	{
	803	int i;
	804
	805	for (i = 0; i < ale->params.ale_entries; i++) {
	806	cpsw_ale_read(ale, i, data);
	807	data += ALE_ENTRY_WORDS;
	808	}
	809	}