drivers/net/ethernet/mediatek/mtk_ppe_debugfs.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /* Copyright (C) 2020 Felix Fietkau <[email protected]> */
   3
   4 #include <linux/kernel.h>
   5 #include <linux/debugfs.h>
   6 #include "mtk_eth_soc.h"
   7
   8 struct mtk_flow_addr_info
   9 {
  10         void *src, *dest;
  11         u16 *src_port, *dest_port;
  12         bool ipv6;
  13 };
  14
  15 static const char *mtk_foe_entry_state_str(int state)
  16 {
  17         static const char * const state_str[] = {
  18                 [MTK_FOE_STATE_INVALID] = "INV",
  19                 [MTK_FOE_STATE_UNBIND] = "UNB",
  20                 [MTK_FOE_STATE_BIND] = "BND",
  21                 [MTK_FOE_STATE_FIN] = "FIN",
  22         };
  23
  24         if (state >= ARRAY_SIZE(state_str) || !state_str[state])
  25                 return "UNK";
  26
  27         return state_str[state];
  28 }
  29
  30 static const char *mtk_foe_pkt_type_str(int type)
  31 {
  32         static const char * const type_str[] = {
  33                 [MTK_PPE_PKT_TYPE_IPV4_HNAPT] = "IPv4 5T",
  34                 [MTK_PPE_PKT_TYPE_IPV4_ROUTE] = "IPv4 3T",
  35                 [MTK_PPE_PKT_TYPE_IPV4_DSLITE] = "DS-LITE",
  36                 [MTK_PPE_PKT_TYPE_IPV6_ROUTE_3T] = "IPv6 3T",
  37                 [MTK_PPE_PKT_TYPE_IPV6_ROUTE_5T] = "IPv6 5T",
  38                 [MTK_PPE_PKT_TYPE_IPV6_6RD] = "6RD",
  39         };
  40
  41         if (type >= ARRAY_SIZE(type_str) || !type_str[type])
  42                 return "UNKNOWN";
  43
  44         return type_str[type];
  45 }
  46
  47 static void
  48 mtk_print_addr(struct seq_file *m, u32 *addr, bool ipv6)
  49 {
  50         u32 n_addr[4];
  51         int i;
  52
  53         if (!ipv6) {
  54                 seq_printf(m, "%pI4h", addr);
  55                 return;
  56         }
  57
  58         for (i = 0; i < ARRAY_SIZE(n_addr); i++)
  59                 n_addr[i] = htonl(addr[i]);
  60         seq_printf(m, "%pI6", n_addr);
  61 }
  62
  63 static void
  64 mtk_print_addr_info(struct seq_file *m, struct mtk_flow_addr_info *ai)
  65 {
  66         mtk_print_addr(m, ai->src, ai->ipv6);
  67         if (ai->src_port)
  68                 seq_printf(m, ":%d", *ai->src_port);
  69         seq_printf(m, "->");
  70         mtk_print_addr(m, ai->dest, ai->ipv6);
  71         if (ai->dest_port)
  72                 seq_printf(m, ":%d", *ai->dest_port);
  73 }
  74
  75 static int
  76 mtk_ppe_debugfs_foe_show(struct seq_file *m, void *private, bool bind)
  77 {
  78         struct mtk_ppe *ppe = m->private;
  79         int i;
  80
  81         for (i = 0; i < MTK_PPE_ENTRIES; i++) {
  82                 struct mtk_foe_entry *entry = mtk_foe_get_entry(ppe, i);
  83                 struct mtk_foe_mac_info *l2;
  84                 struct mtk_flow_addr_info ai = {};
  85                 unsigned char h_source[ETH_ALEN];
  86                 unsigned char h_dest[ETH_ALEN];
  87                 int type, state;
  88                 u32 ib2;
  89
  90
  91                 state = FIELD_GET(MTK_FOE_IB1_STATE, entry->ib1);
  92                 if (!state)
  93                         continue;
  94
  95                 if (bind && state != MTK_FOE_STATE_BIND)
  96                         continue;
  97
  98                 type = FIELD_GET(MTK_FOE_IB1_PACKET_TYPE, entry->ib1);
  99                 seq_printf(m, "%05x %s %7s", i,
 100                            mtk_foe_entry_state_str(state),
 101                            mtk_foe_pkt_type_str(type));
 102
 103                 switch (type) {
 104                 case MTK_PPE_PKT_TYPE_IPV4_HNAPT:
 105                 case MTK_PPE_PKT_TYPE_IPV4_DSLITE:
 106                         ai.src_port = &entry->ipv4.orig.src_port;
 107                         ai.dest_port = &entry->ipv4.orig.dest_port;
 108                         fallthrough;
 109                 case MTK_PPE_PKT_TYPE_IPV4_ROUTE:
 110                         ai.src = &entry->ipv4.orig.src_ip;
 111                         ai.dest = &entry->ipv4.orig.dest_ip;
 112                         break;
 113                 case MTK_PPE_PKT_TYPE_IPV6_ROUTE_5T:
 114                         ai.src_port = &entry->ipv6.src_port;
 115                         ai.dest_port = &entry->ipv6.dest_port;
 116                         fallthrough;
 117                 case MTK_PPE_PKT_TYPE_IPV6_ROUTE_3T:
 118                 case MTK_PPE_PKT_TYPE_IPV6_6RD:
 119                         ai.src = &entry->ipv6.src_ip;
 120                         ai.dest = &entry->ipv6.dest_ip;
 121                         ai.ipv6 = true;
 122                         break;
 123                 }
 124
 125                 seq_printf(m, " orig=");
 126                 mtk_print_addr_info(m, &ai);
 127
 128                 switch (type) {
 129                 case MTK_PPE_PKT_TYPE_IPV4_HNAPT:
 130                 case MTK_PPE_PKT_TYPE_IPV4_DSLITE:
 131                         ai.src_port = &entry->ipv4.new.src_port;
 132                         ai.dest_port = &entry->ipv4.new.dest_port;
 133                         fallthrough;
 134                 case MTK_PPE_PKT_TYPE_IPV4_ROUTE:
 135                         ai.src = &entry->ipv4.new.src_ip;
 136                         ai.dest = &entry->ipv4.new.dest_ip;
 137                         seq_printf(m, " new=");
 138                         mtk_print_addr_info(m, &ai);
 139                         break;
 140                 }
 141
 142                 if (type >= MTK_PPE_PKT_TYPE_IPV4_DSLITE) {
 143                         l2 = &entry->ipv6.l2;
 144                         ib2 = entry->ipv6.ib2;
 145                 } else {
 146                         l2 = &entry->ipv4.l2;
 147                         ib2 = entry->ipv4.ib2;
 148                 }
 149
 150                 *((__be32 *)h_source) = htonl(l2->src_mac_hi);
 151                 *((__be16 *)&h_source[4]) = htons(l2->src_mac_lo);
 152                 *((__be32 *)h_dest) = htonl(l2->dest_mac_hi);
 153                 *((__be16 *)&h_dest[4]) = htons(l2->dest_mac_lo);
 154
 155                 seq_printf(m, " eth=%pM->%pM etype=%04x"
 156                               " vlan=%d,%d ib1=%08x ib2=%08x\n",
 157                            h_source, h_dest, ntohs(l2->etype),
 158                            l2->vlan1, l2->vlan2, entry->ib1, ib2);
 159         }
 160
 161         return 0;
 162 }
 163
 164 static int
 165 mtk_ppe_debugfs_foe_all_show(struct seq_file *m, void *private)
 166 {
 167         return mtk_ppe_debugfs_foe_show(m, private, false);
 168 }
 169 DEFINE_SHOW_ATTRIBUTE(mtk_ppe_debugfs_foe_all);
 170
 171 static int
 172 mtk_ppe_debugfs_foe_bind_show(struct seq_file *m, void *private)
 173 {
 174         return mtk_ppe_debugfs_foe_show(m, private, true);
 175 }
 176 DEFINE_SHOW_ATTRIBUTE(mtk_ppe_debugfs_foe_bind);
 177
 178 int mtk_ppe_debugfs_init(struct mtk_ppe *ppe, int index)
 179 {
 180         struct dentry *root;
 181
 182         snprintf(ppe->dirname, sizeof(ppe->dirname), "ppe%d", index);
 183
 184         root = debugfs_create_dir(ppe->dirname, NULL);
 185         debugfs_create_file("entries", S_IRUGO, root, ppe, &mtk_ppe_debugfs_foe_all_fops);
 186         debugfs_create_file("bind", S_IRUGO, root, ppe, &mtk_ppe_debugfs_foe_bind_fops);
 187
 188         return 0;
 189 }