// SPDX-License-Identifier: GPL-2.0
/*
* Texas Instruments N-Port Ethernet Switch Address Lookup Engine
*
* Copyright (C) 2012 Texas Instruments
*
*/
#include <linux/bitmap.h>
#include <linux/if_vlan.h>
#include <linux/kernel.h>
#include <linux/module.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, mask) (((rev) >> 8) & (mask))
#define ALE_VERSION_MINOR(rev) (rev & 0xff)
#define ALE_VERSION_1R3 0x0103
#define ALE_VERSION_1R4 0x0104
/* ALE Registers */
#define ALE_IDVER 0x00
#define ALE_STATUS 0x04
#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
/* ALE NetCP NU switch specific Registers */
#define ALE_UNKNOWNVLAN_MEMBER 0x90
#define ALE_UNKNOWNVLAN_UNREG_MCAST_FLOOD 0x94
#define ALE_UNKNOWNVLAN_REG_MCAST_FLOOD 0x98
#define ALE_UNKNOWNVLAN_FORCE_UNTAG_EGRESS 0x9C
#define ALE_VLAN_MASK_MUX(reg) (0xc0 + (0x4 * (reg)))
#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
#define ALE_TABLE_SIZE_MULTIPLIER 1024
#define ALE_STATUS_SIZE_MASK 0x1f
#define ALE_TABLE_SIZE_DEFAULT 64
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 DEFINE_ALE_FIELD1(name, start) \
static inline int cpsw_ale_get_##name(u32 *ale_entry, u32 bits) \
{ \
return cpsw_ale_get_field(ale_entry, start, bits); \
} \
static inline void cpsw_ale_set_##name(u32 *ale_entry, u32 value, \
u32 bits) \
{ \
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_FIELD1(port_mask, 66)
DEFINE_ALE_FIELD(super, 65, 1)
DEFINE_ALE_FIELD(ucast_type, 62, 2)
DEFINE_ALE_FIELD1(port_num, 66)
DEFINE_ALE_FIELD(blocked, 65, 1)
DEFINE_ALE_FIELD(secure, 64, 1)
DEFINE_ALE_FIELD1(vlan_untag_force, 24)
DEFINE_ALE_FIELD1(vlan_reg_mcast, 16)
DEFINE_ALE_FIELD1(vlan_unreg_mcast, 8)
DEFINE_ALE_FIELD1(vlan_member_list, 0)
DEFINE_ALE_FIELD(mcast, 40, 1)
/* ALE NetCP nu switch specific */
DEFINE_ALE_FIELD(vlan_unreg_mcast_idx, 20, 3)
DEFINE_ALE_FIELD(vlan_reg_mcast_idx, 44, 3)
/* 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, const 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);
writel_relaxed(idx, ale->params.ale_regs + ALE_TABLE_CONTROL);
for (i = 0; i < ALE_ENTRY_WORDS; i++)
ale_entry[i] = readl_relaxed(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++)
writel_relaxed(ale_entry[i],