[deliverable/linux.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)
{
	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;
}

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;
	}
}
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
	237	int cpsw_ale_flush_multicast(struct cpsw_ale *ale, int port_mask)
	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
	248	if (cpsw_ale_get_mcast(ale_entry)) {
	249	u8 addr[6];
	250
	251	cpsw_ale_get_addr(ale_entry, addr);
	252	if (!is_broadcast_ether_addr(addr))
	253	cpsw_ale_flush_mcast(ale, ale_entry, port_mask);
	254	}
	255
	256	cpsw_ale_write(ale, idx, ale_entry);
	257	}
	258	return 0;
db82173f M	259	}
	260
	261	static void cpsw_ale_flush_ucast(struct cpsw_ale ale, u32 ale_entry,
	262	int port_mask)
	263	{
	264	int port;
	265
	266	port = cpsw_ale_get_port_num(ale_entry);
	267	if ((BIT(port) & port_mask) == 0)
	268	return; /* ports dont intersect, not interested */
	269	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
	270	}
	271
	272	int cpsw_ale_flush(struct cpsw_ale *ale, int port_mask)
	273	{
	274	u32 ale_entry[ALE_ENTRY_WORDS];
	275	int ret, idx;
	276
	277	for (idx = 0; idx < ale->params.ale_entries; idx++) {
	278	cpsw_ale_read(ale, idx, ale_entry);
	279	ret = cpsw_ale_get_entry_type(ale_entry);
	280	if (ret != ALE_TYPE_ADDR && ret != ALE_TYPE_VLAN_ADDR)
	281	continue;
	282
	283	if (cpsw_ale_get_mcast(ale_entry))
	284	cpsw_ale_flush_mcast(ale, ale_entry, port_mask);
	285	else
	286	cpsw_ale_flush_ucast(ale, ale_entry, port_mask);
	287
	288	cpsw_ale_write(ale, idx, ale_entry);
	289	}
	290	return 0;
	291	}
	292
e11b220f M	293	static inline void cpsw_ale_set_vlan_entry_type(u32 *ale_entry,
	294	int flags, u16 vid)
	295	{
	296	if (flags & ALE_VLAN) {
	297	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_VLAN_ADDR);
	298	cpsw_ale_set_vlan_id(ale_entry, vid);
	299	} else {
	300	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_ADDR);
	301	}
	302	}
	303
	304	int cpsw_ale_add_ucast(struct cpsw_ale ale, u8 addr, int port,
	305	int flags, u16 vid)
db82173f M	306	{
	307	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
	308	int idx;
	309
e11b220f M	310	cpsw_ale_set_vlan_entry_type(ale_entry, flags, vid);
e11b220f M	311
db82173f M	312	cpsw_ale_set_addr(ale_entry, addr);
	313	cpsw_ale_set_ucast_type(ale_entry, ALE_UCAST_PERSISTANT);
	314	cpsw_ale_set_secure(ale_entry, (flags & ALE_SECURE) ? 1 : 0);
	315	cpsw_ale_set_blocked(ale_entry, (flags & ALE_BLOCKED) ? 1 : 0);
	316	cpsw_ale_set_port_num(ale_entry, port);
	317
e11b220f	318	idx = cpsw_ale_match_addr(ale, addr, (flags & ALE_VLAN) ? vid : 0);
db82173f M	319	if (idx < 0)
	320	idx = cpsw_ale_match_free(ale);
	321	if (idx < 0)
	322	idx = cpsw_ale_find_ageable(ale);
	323	if (idx < 0)
	324	return -ENOMEM;
	325
	326	cpsw_ale_write(ale, idx, ale_entry);
	327	return 0;
	328	}
	329
e11b220f M	330	int cpsw_ale_del_ucast(struct cpsw_ale ale, u8 addr, int port,
e11b220f M	331	int flags, u16 vid)
db82173f M	332	{
	333	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
	334	int idx;
	335
e11b220f	336	idx = cpsw_ale_match_addr(ale, addr, (flags & ALE_VLAN) ? vid : 0);
db82173f M	337	if (idx < 0)
	338	return -ENOENT;
	339
	340	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
	341	cpsw_ale_write(ale, idx, ale_entry);
	342	return 0;
	343	}
	344
	345	int cpsw_ale_add_mcast(struct cpsw_ale ale, u8 addr, int port_mask,
e11b220f	346	int flags, u16 vid, int mcast_state)
db82173f M	347	{
	348	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
	349	int idx, mask;
	350
e11b220f	351	idx = cpsw_ale_match_addr(ale, addr, (flags & ALE_VLAN) ? vid : 0);
db82173f M	352	if (idx >= 0)
	353	cpsw_ale_read(ale, idx, ale_entry);
	354
e11b220f M	355	cpsw_ale_set_vlan_entry_type(ale_entry, flags, vid);
e11b220f M	356
db82173f	357	cpsw_ale_set_addr(ale_entry, addr);
e11b220f	358	cpsw_ale_set_super(ale_entry, (flags & ALE_BLOCKED) ? 1 : 0);
db82173f M	359	cpsw_ale_set_mcast_state(ale_entry, mcast_state);
	360
	361	mask = cpsw_ale_get_port_mask(ale_entry);
	362	port_mask \|= mask;
	363	cpsw_ale_set_port_mask(ale_entry, port_mask);
	364
	365	if (idx < 0)
	366	idx = cpsw_ale_match_free(ale);
	367	if (idx < 0)
	368	idx = cpsw_ale_find_ageable(ale);
	369	if (idx < 0)
	370	return -ENOMEM;
	371
	372	cpsw_ale_write(ale, idx, ale_entry);
	373	return 0;
	374	}
	375
e11b220f M	376	int cpsw_ale_del_mcast(struct cpsw_ale ale, u8 addr, int port_mask,
e11b220f M	377	int flags, u16 vid)
db82173f M	378	{
	379	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
	380	int idx;
	381
e11b220f	382	idx = cpsw_ale_match_addr(ale, addr, (flags & ALE_VLAN) ? vid : 0);
db82173f M	383	if (idx < 0)
	384	return -EINVAL;
	385
	386	cpsw_ale_read(ale, idx, ale_entry);
	387
	388	if (port_mask)
	389	cpsw_ale_set_port_mask(ale_entry, port_mask);
	390	else
	391	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
	392
	393	cpsw_ale_write(ale, idx, ale_entry);
	394	return 0;
	395	}
	396
e11b220f M	397	int cpsw_ale_add_vlan(struct cpsw_ale *ale, u16 vid, int port, int untag,
	398	int reg_mcast, int unreg_mcast)
	399	{
	400	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
	401	int idx;
	402
	403	idx = cpsw_ale_match_vlan(ale, vid);
	404	if (idx >= 0)
	405	cpsw_ale_read(ale, idx, ale_entry);
	406
	407	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_VLAN);
	408	cpsw_ale_set_vlan_id(ale_entry, vid);
	409
	410	cpsw_ale_set_vlan_untag_force(ale_entry, untag);
	411	cpsw_ale_set_vlan_reg_mcast(ale_entry, reg_mcast);
	412	cpsw_ale_set_vlan_unreg_mcast(ale_entry, unreg_mcast);
	413	cpsw_ale_set_vlan_member_list(ale_entry, port);
	414
	415	if (idx < 0)
	416	idx = cpsw_ale_match_free(ale);
	417	if (idx < 0)
	418	idx = cpsw_ale_find_ageable(ale);
	419	if (idx < 0)
	420	return -ENOMEM;
	421
	422	cpsw_ale_write(ale, idx, ale_entry);
	423	return 0;
	424	}
	425
	426	int cpsw_ale_del_vlan(struct cpsw_ale *ale, u16 vid, int port_mask)
	427	{
	428	u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
	429	int idx;
	430
	431	idx = cpsw_ale_match_vlan(ale, vid);
	432	if (idx < 0)
	433	return -ENOENT;
	434
	435	cpsw_ale_read(ale, idx, ale_entry);
	436
	437	if (port_mask)
	438	cpsw_ale_set_vlan_member_list(ale_entry, port_mask);
	439	else
	440	cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
	441
	442	cpsw_ale_write(ale, idx, ale_entry);
	443	return 0;
	444	}
	445
db82173f M	446	struct ale_control_info {
	447	const char *name;
	448	int offset, port_offset;
	449	int shift, port_shift;
	450	int bits;
	451	};
	452
	453	static const struct ale_control_info ale_controls[ALE_NUM_CONTROLS] = {
	454	[ALE_ENABLE] = {
	455	.name = "enable",
	456	.offset = ALE_CONTROL,
	457	.port_offset = 0,
	458	.shift = 31,
	459	.port_shift = 0,
	460	.bits = 1,
	461	},
	462	[ALE_CLEAR] = {
	463	.name = "clear",
	464	.offset = ALE_CONTROL,
	465	.port_offset = 0,
	466	.shift = 30,
	467	.port_shift = 0,
	468	.bits = 1,
	469	},
	470	[ALE_AGEOUT] = {
	471	.name = "ageout",
	472	.offset = ALE_CONTROL,
	473	.port_offset = 0,
	474	.shift = 29,
	475	.port_shift = 0,
	476	.bits = 1,
	477	},
0cd8f9cc M	478	[ALE_P0_UNI_FLOOD] = {
	479	.name = "port0_unicast_flood",
	480	.offset = ALE_CONTROL,
	481	.port_offset = 0,
	482	.shift = 8,
	483	.port_shift = 0,
	484	.bits = 1,
	485	},
db82173f M	486	[ALE_VLAN_NOLEARN] = {
	487	.name = "vlan_nolearn",
	488	.offset = ALE_CONTROL,
	489	.port_offset = 0,
	490	.shift = 7,
	491	.port_shift = 0,
	492	.bits = 1,
	493	},
	494	[ALE_NO_PORT_VLAN] = {
	495	.name = "no_port_vlan",
	496	.offset = ALE_CONTROL,
	497	.port_offset = 0,
	498	.shift = 6,
	499	.port_shift = 0,
	500	.bits = 1,
	501	},
	502	[ALE_OUI_DENY] = {
	503	.name = "oui_deny",
	504	.offset = ALE_CONTROL,
	505	.port_offset = 0,
	506	.shift = 5,
	507	.port_shift = 0,
	508	.bits = 1,
	509	},
	510	[ALE_BYPASS] = {
	511	.name = "bypass",
	512	.offset = ALE_CONTROL,
	513	.port_offset = 0,
	514	.shift = 4,
	515	.port_shift = 0,
	516	.bits = 1,
	517	},
	518	[ALE_RATE_LIMIT_TX] = {
	519	.name = "rate_limit_tx",
	520	.offset = ALE_CONTROL,
	521	.port_offset = 0,
	522	.shift = 3,
	523	.port_shift = 0,
	524	.bits = 1,
	525	},
	526	[ALE_VLAN_AWARE] = {
	527	.name = "vlan_aware",
	528	.offset = ALE_CONTROL,
	529	.port_offset = 0,
	530	.shift = 2,
	531	.port_shift = 0,
	532	.bits = 1,
	533	},
	534	[ALE_AUTH_ENABLE] = {
	535	.name = "auth_enable",
	536	.offset = ALE_CONTROL,
	537	.port_offset = 0,
	538	.shift = 1,
	539	.port_shift = 0,
	540	.bits = 1,
	541	},
	542	[ALE_RATE_LIMIT] = {
	543	.name = "rate_limit",
	544	.offset = ALE_CONTROL,
	545	.port_offset = 0,
	546	.shift = 0,
	547	.port_shift = 0,
	548	.bits = 1,
	549	},
550	[ALE_PORT_STATE] = {
551	.name = "port_state",
552	.offset = ALE_PORTCTL,
553	.port_offset = 4,
554	.shift = 0,
555	.port_shift = 0,
556	.bits = 2,
557	},
558	[ALE_PORT_DROP_UNTAGGED] = {
559	.name = "drop_untagged",
560	.offset = ALE_PORTCTL,
561	.port_offset = 4,
562	.shift = 2,
563	.port_shift = 0,
564	.bits = 1,
565	},
566	[ALE_PORT_DROP_UNKNOWN_VLAN] = {
567	.name = "drop_unknown",
568	.offset = ALE_PORTCTL,
569	.port_offset = 4,
570	.shift = 3,
571	.port_shift = 0,
572	.bits = 1,
573	},
574	[ALE_PORT_NOLEARN] = {
575	.name = "nolearn",
576	.offset = ALE_PORTCTL,
577	.port_offset = 4,
578	.shift = 4,
579	.port_shift = 0,
580	.bits = 1,
581	},
0cd8f9cc M	582	[ALE_PORT_NO_SA_UPDATE] = {
	583	.name = "no_source_update",
	584	.offset = ALE_PORTCTL,
	585	.port_offset = 4,
	586	.shift = 5,
	587	.port_shift = 0,
	588	.bits = 1,
	589	},
db82173f M	590	[ALE_PORT_MCAST_LIMIT] = {
	591	.name = "mcast_limit",
	592	.offset = ALE_PORTCTL,
	593	.port_offset = 4,
	594	.shift = 16,
	595	.port_shift = 0,
	596	.bits = 8,
	597	},
	598	[ALE_PORT_BCAST_LIMIT] = {
	599	.name = "bcast_limit",
	600	.offset = ALE_PORTCTL,
	601	.port_offset = 4,
	602	.shift = 24,
	603	.port_shift = 0,
	604	.bits = 8,
	605	},
	606	[ALE_PORT_UNKNOWN_VLAN_MEMBER] = {
	607	.name = "unknown_vlan_member",
	608	.offset = ALE_UNKNOWNVLAN,
	609	.port_offset = 0,
	610	.shift = 0,
	611	.port_shift = 0,
	612	.bits = 6,
	613	},
	614	[ALE_PORT_UNKNOWN_MCAST_FLOOD] = {
	615	.name = "unknown_mcast_flood",
	616	.offset = ALE_UNKNOWNVLAN,
	617	.port_offset = 0,
	618	.shift = 8,
	619	.port_shift = 0,
	620	.bits = 6,
	621	},
	622	[ALE_PORT_UNKNOWN_REG_MCAST_FLOOD] = {
	623	.name = "unknown_reg_flood",
	624	.offset = ALE_UNKNOWNVLAN,
	625	.port_offset = 0,
	626	.shift = 16,
	627	.port_shift = 0,
	628	.bits = 6,
	629	},
	630	[ALE_PORT_UNTAGGED_EGRESS] = {
	631	.name = "untagged_egress",
	632	.offset = ALE_UNKNOWNVLAN,
	633	.port_offset = 0,
	634	.shift = 24,
	635	.port_shift = 0,
	636	.bits = 6,
	637	},
	638	};
	639
	640	int cpsw_ale_control_set(struct cpsw_ale *ale, int port, int control,
	641	int value)
	642	{
	643	const struct ale_control_info *info;
	644	int offset, shift;
	645	u32 tmp, mask;
	646
	647	if (control < 0 \|\| control >= ARRAY_SIZE(ale_controls))
	648	return -EINVAL;
	649
	650	info = &ale_controls[control];
	651	if (info->port_offset == 0 && info->port_shift == 0)
	652	port = 0; /* global, port is a dont care */
	653
654	if (port < 0 \|\| port > ale->params.ale_ports)
655	return -EINVAL;
656
657	mask = BITMASK(info->bits);
658	if (value & ~mask)
659	return -EINVAL;
660
661	offset = info->offset + (port * info->port_offset);
662	shift = info->shift + (port * info->port_shift);
663
664	tmp = __raw_readl(ale->params.ale_regs + offset);
665	tmp = (tmp & ~(mask << shift)) \| (value << shift);
666	__raw_writel(tmp, ale->params.ale_regs + offset);
667
668	return 0;
669	}
670
671	int cpsw_ale_control_get(struct cpsw_ale *ale, int port, int control)
672	{
673	const struct ale_control_info *info;
674	int offset, shift;
675	u32 tmp;
676
677	if (control < 0 \|\| control >= ARRAY_SIZE(ale_controls))
678	return -EINVAL;
679
680	info = &ale_controls[control];
681	if (info->port_offset == 0 && info->port_shift == 0)
682	port = 0; /* global, port is a dont care */
683
684	if (port < 0 \|\| port > ale->params.ale_ports)
685	return -EINVAL;
686
687	offset = info->offset + (port * info->port_offset);
688	shift = info->shift + (port * info->port_shift);
689
690	tmp = __raw_readl(ale->params.ale_regs + offset) >> shift;
691	return tmp & BITMASK(info->bits);
692	}
693
694	static void cpsw_ale_timer(unsigned long arg)
695	{
696	struct cpsw_ale ale = (struct cpsw_ale )arg;
697
698	cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);
699
700	if (ale->ageout) {
701	ale->timer.expires = jiffies + ale->ageout;
702	add_timer(&ale->timer);
703	}
704	}
705
706	int cpsw_ale_set_ageout(struct cpsw_ale *ale, int ageout)
707	{
708	del_timer_sync(&ale->timer);
709	ale->ageout = ageout * HZ;
710	if (ale->ageout) {
711	ale->timer.expires = jiffies + ale->ageout;
712	add_timer(&ale->timer);
713	}
714	return 0;
715	}
716
717	void cpsw_ale_start(struct cpsw_ale *ale)
718	{
719	u32 rev;
720
721	rev = __raw_readl(ale->params.ale_regs + ALE_IDVER);
722	dev_dbg(ale->params.dev, "initialized cpsw ale revision %d.%d\n",
723	ALE_VERSION_MAJOR(rev), ALE_VERSION_MINOR(rev));
724	cpsw_ale_control_set(ale, 0, ALE_ENABLE, 1);
725	cpsw_ale_control_set(ale, 0, ALE_CLEAR, 1);
726
727	init_timer(&ale->timer);
728	ale->timer.data = (unsigned long)ale;
729	ale->timer.function = cpsw_ale_timer;
730	if (ale->ageout) {
731	ale->timer.expires = jiffies + ale->ageout;
732	add_timer(&ale->timer);
733	}
734	}
735
736	void cpsw_ale_stop(struct cpsw_ale *ale)
737	{
738	del_timer_sync(&ale->timer);
739	}
740
741	struct cpsw_ale cpsw_ale_create(struct cpsw_ale_params params)
742	{
743	struct cpsw_ale *ale;
744
745	ale = kzalloc(sizeof(*ale), GFP_KERNEL);
746	if (!ale)
747	return NULL;
748
749	ale->params = *params;
750	ale->ageout = ale->params.ale_ageout * HZ;
751
752	return ale;
753	}
754
755	int cpsw_ale_destroy(struct cpsw_ale *ale)
756	{
757	if (!ale)
758	return -EINVAL;
759	cpsw_ale_stop(ale);
760	cpsw_ale_control_set(ale, 0, ALE_ENABLE, 0);
761	kfree(ale);
762	return 0;
763	}
52c4f0ec M	764
	765	void cpsw_ale_dump(struct cpsw_ale ale, u32 data)
	766	{
	767	int i;
	768
	769	for (i = 0; i < ale->params.ale_entries; i++) {
	770	cpsw_ale_read(ale, i, data);
	771	data += ALE_ENTRY_WORDS;
	772	}
	773	}