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// SPDX-License-Identifier: GPL-2.0
/* Code to dump registers for TI CPSW switch devices.
*
* Copyright (c) 2022 Linutronix GmbH
* Author: Benedikt Spranger <b.spranger@linutronix.de>
*/
#include <stdio.h>
#include <string.h>
#include "internal.h"
#define ALE_ENTRY_BITS 68
#define ALE_ENTRY_WORDS DIV_ROUND_UP(ALE_ENTRY_BITS, 32)
#define ALE_ENTRY_BYTES (ALE_ENTRY_WORDS * 4)
struct address_table_entry
{
u8 port;
u8 reserved1;
u8 reserved2;
u8 reserved3;
u8 addr2;
u8 addr1;
u16 vlan;
u8 addr6;
u8 addr5;
u8 addr4;
u8 addr3;
} __attribute__((packed));
struct vlan_table_entry
{
u8 reserved1;
u8 reserved2;
u8 reserved3;
u8 reserved4;
u8 reserved5;
u8 reserved6;
u16 vlan;
u8 member;
u8 mc_unreg;
u8 mc_reg;
u8 untag;
} __attribute__((packed));
union ale_entry {
struct address_table_entry addr;
struct vlan_table_entry vlan;
u32 val[3];
u8 byte[12];
};
enum entry_type {
FREE_ENTRY = 0,
ADDR_ENTRY,
VLAN_ENTRY,
VLAN_ADDR_ENTRY,
LAST_ENTRY
};
static char *fwd_state_name[] = {
"Forwarding",
"Blocking/Forwarding/Learning",
"Forwarding/Learning",
"Forwarding",
};
static char *type_name[] = {
"free entry",
"address entry",
"VLAN entry",
"VLAN address entry",
"invalid"
};
enum entry_type decode_type(union ale_entry *entry)
{
/* Entry Type (61:60) */
return (entry->byte[7] >> 4) & 0x3;
}
static void print_addr(u8 *data)
{
printf("%02x:%02x:%02x:%02x:%02x:%02x",
data[5], data[4], data[11], data[10], data[9], data[8]);
}
static void decode_multi_addr(union ale_entry *entry, int vlan)
{
printf(" MULTI: ");
print_addr(entry->byte);
printf(" %s", fwd_state_name[entry->addr.vlan >> 14]);
printf("%s", (entry->addr.port & 0x02) ? " Super" : "");
printf(" Ports: 0x%x", (entry->addr.port >> 2) & 0x3);
if (vlan)
printf(" VLAN: %04d", entry->addr.vlan & 0x0fff);
printf("\n");
}
static void decode_uni_addr(union ale_entry *entry, int vlan)
{
printf(" UNI : ");
print_addr(entry->byte);
printf("%s", (entry->addr.port & 0x01) ? " Secure" : "");
printf("%s", (entry->addr.port & 0x02) ? " Block" : "");
printf("%s", (entry->addr.port & 0x20) ? " DLR" : "");
printf(" Ports: 0x%x", (entry->addr.port >> 2) & 0x3);
if (vlan)
printf(" VLAN: %04d", entry->addr.vlan & 0x0fff);
printf("\n");
}
static void decode_oui_addr(union ale_entry *entry)
{
printf(" OUI : ");
print_addr(entry->byte);
printf("\n");
}
static void decode_vlan(union ale_entry *entry)
{
printf(" VLAN ");
printf("%04d: ", entry->vlan.vlan & 0x0fff);
printf("member: 0x%x ", entry->vlan.member & 0x7);
printf("mc flood unreg: 0x%x ", entry->vlan.mc_unreg & 0x7);
printf("mc flood reg: 0x%x ", entry->vlan.mc_reg & 0x7);
printf("untag: 0x%x\n", entry->vlan.untag & 0x7);
}
static enum entry_type decode_ale_entry(unsigned int idx, const u8 *data,
bool last_was_free)
{
union ale_entry *entry = (union ale_entry *) data;
enum entry_type type;
entry = entry + idx;
type = decode_type(entry);
if (!last_was_free || type != FREE_ENTRY)
printf("%04d: %s\n", idx, type_name[type]);
switch (type)
{
case FREE_ENTRY:
goto out;
break;
case ADDR_ENTRY:
/* Multicast: OUI 01:00:5e:xx:xx:xx */
if (entry->addr.addr1 == 0x01)
decode_multi_addr(entry, 0);
else
if ((entry->addr.vlan >> 14) == 0x2)
decode_oui_addr(entry);
else
decode_uni_addr(entry, 0);
break;
case VLAN_ENTRY:
decode_vlan(entry);
break;
case VLAN_ADDR_ENTRY:
/* Check for Individual/Group bit */
if (entry->addr.addr1 & 0x01)
decode_multi_addr(entry, 1);
else
decode_uni_addr(entry, 1);
break;
default:
printf("internal failure.\n");
}
out:
return type;
}
int cpsw_dump_regs(struct ethtool_drvinfo *info __maybe_unused,
struct ethtool_regs *regs)
{
unsigned int entries = regs->len/ALE_ENTRY_BYTES;
enum entry_type type = LAST_ENTRY;
unsigned int i;
printf("ALE Entries (%d):\n", entries);
for (i = 0; i < entries; i++)
type = decode_ale_entry(i, regs->data, (type == FREE_ENTRY));
return 0;
}
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