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// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (C) 2020 Felix Fietkau <nbd@nbd.name> */
#include <linux/kernel.h>
#include <linux/debugfs.h>
#include "mtk_eth_soc.h"
struct mtk_flow_addr_info
{
void *src, *dest;
u16 *src_port, *dest_port;
bool ipv6;
};
static const char *mtk_foe_entry_state_str(int state)
{
static const char * const state_str[] = {
[MTK_FOE_STATE_INVALID] = "INV",
[MTK_FOE_STATE_UNBIND] = "UNB",
[MTK_FOE_STATE_BIND] = "BND",
[MTK_FOE_STATE_FIN] = "FIN",
};
if (state >= ARRAY_SIZE(state_str) || !state_str[state])
return "UNK";
return state_str[state];
}
static const char *mtk_foe_pkt_type_str(int type)
{
static const char * const type_str[] = {
[MTK_PPE_PKT_TYPE_IPV4_HNAPT] = "IPv4 5T",
[MTK_PPE_PKT_TYPE_IPV4_ROUTE] = "IPv4 3T",
[MTK_PPE_PKT_TYPE_IPV4_DSLITE] = "DS-LITE",
[MTK_PPE_PKT_TYPE_IPV6_ROUTE_3T] = "IPv6 3T",
[MTK_PPE_PKT_TYPE_IPV6_ROUTE_5T] = "IPv6 5T",
[MTK_PPE_PKT_TYPE_IPV6_6RD] = "6RD",
};
if (type >= ARRAY_SIZE(type_str) || !type_str[type])
return "UNKNOWN";
return type_str[type];
}
static void
mtk_print_addr(struct seq_file *m, u32 *addr, bool ipv6)
{
u32 n_addr[4];
int i;
if (!ipv6) {
seq_printf(m, "%pI4h", addr);
return;
}
for (i = 0; i < ARRAY_SIZE(n_addr); i++)
n_addr[i] = htonl(addr[i]);
seq_printf(m, "%pI6", n_addr);
}
static void
mtk_print_addr_info(struct seq_file *m, struct mtk_flow_addr_info *ai)
{
mtk_print_addr(m, ai->src, ai->ipv6);
if (ai->src_port)
seq_printf(m, ":%d", *ai->src_port);
seq_printf(m, "->");
mtk_print_addr(m, ai->dest, ai->ipv6);
if (ai->dest_port)
seq_printf(m, ":%d", *ai->dest_port);
}
static int
mtk_ppe_debugfs_foe_show(struct seq_file *m, void *private, bool bind)
{
struct mtk_ppe *ppe = m->private;
int i;
for (i = 0; i < MTK_PPE_ENTRIES; i++) {
struct mtk_foe_entry *entry = mtk_foe_get_entry(ppe, i);
struct mtk_foe_mac_info *l2;
struct mtk_flow_addr_info ai = {};
unsigned char h_source[ETH_ALEN];
unsigned char h_dest[ETH_ALEN];
int type, state;
u32 ib2;
state = FIELD_GET(MTK_FOE_IB1_STATE, entry->ib1);
if (!state)
continue;
if (bind && state != MTK_FOE_STATE_BIND)
continue;
type = FIELD_GET(MTK_FOE_IB1_PACKET_TYPE, entry->ib1);
seq_printf(m, "%05x %s %7s", i,
mtk_foe_entry_state_str(state),
mtk_foe_pkt_type_str(type));
switch (type) {
case MTK_PPE_PKT_TYPE_IPV4_HNAPT:
case MTK_PPE_PKT_TYPE_IPV4_DSLITE:
ai.src_port = &entry->ipv4.orig.src_port;
ai.dest_port = &entry->ipv4.orig.dest_port;
fallthrough;
case MTK_PPE_PKT_TYPE_IPV4_ROUTE:
ai.src = &entry->ipv4.orig.src_ip;
ai.dest = &entry->ipv4.orig.dest_ip;
break;
case MTK_PPE_PKT_TYPE_IPV6_ROUTE_5T:
ai.src_port = &entry->ipv6.src_port;
ai.dest_port = &entry->ipv6.dest_port;
fallthrough;
case MTK_PPE_PKT_TYPE_IPV6_ROUTE_3T:
case MTK_PPE_PKT_TYPE_IPV6_6RD:
ai.src = &entry->ipv6.src_ip;
ai.dest = &entry->ipv6.dest_ip;
ai.ipv6 = true;
break;
}
seq_printf(m, " orig=");
mtk_print_addr_info(m, &ai);
switch (type) {
case MTK_PPE_PKT_TYPE_IPV4_HNAPT:
case MTK_PPE_PKT_TYPE_IPV4_DSLITE:
ai.src_port = &entry->ipv4.new.src_port;
ai.dest_port = &entry->ipv4.new.dest_port;
fallthrough;
case MTK_PPE_PKT_TYPE_IPV4_ROUTE:
ai.src = &entry->ipv4.new.src_ip;
ai.dest = &entry->ipv4.new.dest_ip;
seq_printf(m, " new=");
mtk_print_addr_info(m, &ai);
break;
}
if (type >= MTK_PPE_PKT_TYPE_IPV4_DSLITE) {
l2 = &entry->ipv6.l2;
ib2 = entry->ipv6.ib2;
} else {
l2 = &entry->ipv4.l2;
ib2 = entry->ipv4.ib2;
}
*((__be32 *)h_source) = htonl(l2->src_mac_hi);
*((__be16 *)&h_source[4]) = htons(l2->src_mac_lo);
*((__be32 *)h_dest) = htonl(l2->dest_mac_hi);
*((__be16 *)&h_dest[4]) = htons(l2->dest_mac_lo);
seq_printf(m, " eth=%pM->%pM etype=%04x"
" vlan=%d,%d ib1=%08x ib2=%08x\n",
h_source, h_dest, ntohs(l2->etype),
l2->vlan1, l2->vlan2, entry->ib1, ib2);
}
return 0;
}
static int
mtk_ppe_debugfs_foe_all_show(struct seq_file *m, void *private)
{
return mtk_ppe_debugfs_foe_show(m, private, false);
}
DEFINE_SHOW_ATTRIBUTE(mtk_ppe_debugfs_foe_all);
static int
mtk_ppe_debugfs_foe_bind_show(struct seq_file *m, void *private)
{
return mtk_ppe_debugfs_foe_show(m, private, true);
}
DEFINE_SHOW_ATTRIBUTE(mtk_ppe_debugfs_foe_bind);
int mtk_ppe_debugfs_init(struct mtk_ppe *ppe, int index)
{
struct dentry *root;
snprintf(ppe->dirname, sizeof(ppe->dirname), "ppe%d", index);
root = debugfs_create_dir(ppe->dirname, NULL);
debugfs_create_file("entries", S_IRUGO, root, ppe, &mtk_ppe_debugfs_foe_all_fops);
debugfs_create_file("bind", S_IRUGO, root, ppe, &mtk_ppe_debugfs_foe_bind_fops);
return 0;
}
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