developer | e5e687d | 2023-08-08 16:05:33 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| 2 | /* |
| 3 | * Copyright (c) 2023 MediaTek Inc. All Rights Reserved. |
| 4 | * |
| 5 | * Author: Ren-Ting Wang <ren-ting.wang@mediatek.com> |
| 6 | */ |
| 7 | |
| 8 | #ifndef _TOPS_TUNNEL_H_ |
| 9 | #define _TOPS_TUNNEL_H_ |
| 10 | |
| 11 | #include <linux/bitmap.h> |
| 12 | #include <linux/hashtable.h> |
| 13 | #include <linux/if_ether.h> |
| 14 | #include <linux/ip.h> |
| 15 | #include <linux/kthread.h> |
| 16 | #include <linux/netdevice.h> |
| 17 | #include <linux/refcount.h> |
| 18 | #include <linux/spinlock.h> |
| 19 | #include <linux/types.h> |
| 20 | |
| 21 | #include "protocol/l2tp/l2tp.h" |
| 22 | |
| 23 | /* tunnel info status */ |
| 24 | #define TNL_STA_UNINIT (BIT(TNL_STATUS_UNINIT)) |
| 25 | #define TNL_STA_INIT (BIT(TNL_STATUS_INIT)) |
| 26 | #define TNL_STA_QUEUED (BIT(TNL_STATUS_QUEUED)) |
| 27 | #define TNL_STA_UPDATING (BIT(TNL_STATUS_UPDATING)) |
| 28 | #define TNL_STA_UPDATED (BIT(TNL_STATUS_UPDATED)) |
| 29 | #define TNL_STA_DIP_UPDATE (BIT(TNL_STATUS_DIP_UPDATE)) |
| 30 | #define TNL_STA_DELETING (BIT(TNL_STATUS_DELETING)) |
| 31 | |
| 32 | /* tunnel params flags */ |
| 33 | #define TNL_DECAP_ENABLE (BIT(TNL_PARAMS_DECAP_ENABLE_BIT)) |
| 34 | #define TNL_ENCAP_ENABLE (BIT(TNL_PARAMS_ENCAP_ENABLE_BIT)) |
| 35 | |
| 36 | /* tunnel info flags */ |
| 37 | #define TNL_INFO_DEBUG (BIT(TNL_INFO_DEBUG_BIT)) |
| 38 | |
| 39 | struct tops_tnl_info; |
| 40 | struct tops_tnl_params; |
| 41 | |
| 42 | /* |
| 43 | * tops_crsn |
| 44 | * TOPS_CRSN_TNL_ID_START |
| 45 | * TOPS_CRSN_TNL_ID_END |
| 46 | * APMCU checks whether tops_crsn is in this range to know if this packet |
| 47 | * was processed by TOPS previously. |
| 48 | */ |
| 49 | enum tops_crsn { |
| 50 | TOPS_CRSN_IGNORE = 0x00, |
| 51 | TOPS_CRSN_TNL_ID_START = 0x10, |
| 52 | TOPS_CRSN_TNL_ID_END = 0x2F, |
| 53 | }; |
| 54 | |
| 55 | enum tops_entry_type { |
| 56 | TOPS_ENTRY_NONE = 0, |
| 57 | TOPS_ENTRY_GRETAP, |
| 58 | TOPS_ENTRY_PPTP, |
| 59 | TOPS_ENTRY_IP_L2TP, |
| 60 | TOPS_ENTRY_UDP_L2TP_CTRL, |
| 61 | TOPS_ENTRY_UDP_L2TP_DATA = 5, |
| 62 | TOPS_ENTRY_VXLAN, |
| 63 | TOPS_ENTRY_NATT, |
| 64 | TOPS_ENTRY_CAPWAP_CTRL, |
| 65 | TOPS_ENTRY_CAPWAP_DATA, |
| 66 | TOPS_ENTRY_CAPWAP_DTLS = 10, |
| 67 | TOPS_ENTRY_IPSEC_ESP, |
| 68 | TOPS_ENTRY_IPSEC_AH, |
| 69 | |
| 70 | __TOPS_ENTRY_MAX = CONFIG_TOPS_TNL_NUM, |
| 71 | }; |
| 72 | |
| 73 | enum tops_tunnel_mbox_cmd { |
| 74 | TOPS_TNL_MBOX_CMD_RESV, |
| 75 | TOPS_TNL_START_ADDR_SYNC, |
| 76 | |
| 77 | __TOPS_TNL_MBOX_CMD_MAX, |
| 78 | }; |
| 79 | |
| 80 | enum tunnel_ctrl_event { |
| 81 | TUNNEL_CTRL_EVENT_NULL, |
| 82 | TUNNEL_CTRL_EVENT_NEW, |
| 83 | TUNNEL_CTRL_EVENT_DEL, |
| 84 | TUNNEL_CTRL_EVENT_DIP_UPDATE, |
| 85 | |
| 86 | __TUNNEL_CTRL_EVENT_MAX, |
| 87 | }; |
| 88 | |
| 89 | enum tnl_status { |
| 90 | TNL_STATUS_UNINIT, |
| 91 | TNL_STATUS_INIT, |
| 92 | TNL_STATUS_QUEUED, |
| 93 | TNL_STATUS_UPDATING, |
| 94 | TNL_STATUS_UPDATED, |
| 95 | TNL_STATUS_DIP_UPDATE, |
| 96 | TNL_STATUS_DELETING, |
| 97 | |
| 98 | __TNL_STATUS_MAX, |
| 99 | }; |
| 100 | |
| 101 | enum tops_tnl_params_flag { |
| 102 | TNL_PARAMS_DECAP_ENABLE_BIT, |
| 103 | TNL_PARAMS_ENCAP_ENABLE_BIT, |
| 104 | }; |
| 105 | |
| 106 | enum tops_tnl_info_flag { |
| 107 | TNL_INFO_DEBUG_BIT, |
| 108 | }; |
| 109 | |
| 110 | /* record outer tunnel header data for HW offloading */ |
| 111 | struct tops_tnl_params { |
| 112 | u8 daddr[ETH_ALEN]; |
| 113 | u8 saddr[ETH_ALEN]; |
| 114 | __be32 dip; |
| 115 | __be32 sip; |
| 116 | __be16 dport; |
| 117 | __be16 sport; |
| 118 | u16 protocol; |
| 119 | u8 tops_entry_proto; |
| 120 | u8 flag; /* bit: enum tops_tnl_params_flag */ |
| 121 | union { |
| 122 | struct l2tp_param l2tp; /* 4B */ |
| 123 | } priv; |
| 124 | } __packed __aligned(16); |
| 125 | |
| 126 | struct tops_tnl_info { |
| 127 | struct tops_tnl_params tnl_params; |
| 128 | struct tops_tnl_params cache; |
| 129 | struct list_head sync_node; |
| 130 | struct hlist_node hlist; |
| 131 | struct net_device *dev; |
| 132 | struct timer_list taging; |
| 133 | spinlock_t lock; |
| 134 | u32 tnl_idx; |
| 135 | u32 status; |
| 136 | u32 flag; /* bit: enum tops_tnl_info_flag */ |
| 137 | refcount_t refcnt; |
| 138 | } __aligned(16); |
| 139 | |
| 140 | struct tops_tnl_type { |
| 141 | const char *type_name; |
| 142 | int (*tnl_decap_param_setup)(struct sk_buff *skb, |
| 143 | struct tops_tnl_params *tnl_params); |
| 144 | int (*tnl_encap_param_setup)(struct sk_buff *skb, |
| 145 | struct tops_tnl_params *tnl_params); |
| 146 | int (*tnl_debug_param_setup)(const char *buf, int *ofs, |
| 147 | struct tops_tnl_params *tnl_params); |
| 148 | int (*tnl_dump_param)(char *buf, struct tops_tnl_params *tnl_params); |
| 149 | bool (*tnl_info_match)(struct tops_tnl_params *params1, |
| 150 | struct tops_tnl_params *params2); |
| 151 | bool (*tnl_decap_offloadable)(struct sk_buff *skb); |
| 152 | enum tops_entry_type tops_entry; |
| 153 | bool has_inner_eth; |
| 154 | }; |
| 155 | |
| 156 | void mtk_tops_tnl_info_submit_no_tnl_lock(struct tops_tnl_info *tnl_info); |
| 157 | void mtk_tops_tnl_info_submit(struct tops_tnl_info *tnl_info); |
| 158 | struct tops_tnl_info *mtk_tops_tnl_info_find(struct tops_tnl_params *tnl_params); |
| 159 | struct tops_tnl_info *mtk_tops_tnl_info_alloc(void); |
| 160 | void mtk_tops_tnl_info_hash(struct tops_tnl_info *tnl_info); |
| 161 | |
| 162 | int mtk_tops_tnl_offload_init(struct platform_device *pdev); |
| 163 | void mtk_tops_tnl_offload_deinit(struct platform_device *pdev); |
| 164 | int mtk_tops_tnl_offload_proto_setup(struct platform_device *pdev); |
| 165 | void mtk_tops_tnl_offload_proto_teardown(struct platform_device *pdev); |
| 166 | void mtk_tops_tnl_offload_flush(void); |
| 167 | void mtk_tops_tnl_offload_recover(void); |
| 168 | void mtk_tops_tnl_offload_netdev_down(struct net_device *ndev); |
| 169 | |
| 170 | struct tops_tnl_type *mtk_tops_tnl_type_get_by_name(const char *name); |
| 171 | int mtk_tops_tnl_type_register(struct tops_tnl_type *tnl_type); |
| 172 | void mtk_tops_tnl_type_unregister(struct tops_tnl_type *tnl_type); |
| 173 | #endif /* _TOPS_TUNNEL_H_ */ |