1/* SPDX-License-Identifier: GPL-2.0-only */ 2/**************************************************************************** 3 * Driver for Solarflare network controllers and boards 4 * Copyright 2019 Solarflare Communications Inc. 5 * Copyright 2020-2022 Xilinx Inc. 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License version 2 as published 9 * by the Free Software Foundation, incorporated herein by reference. 10 */ 11 12#ifndef EFX_TC_H 13#define EFX_TC_H 14#include <net/flow_offload.h> 15#include <linux/rhashtable.h> 16#include "net_driver.h" 17#include "tc_counters.h" 18 19#define IS_ALL_ONES(v) (!(typeof (v))~(v)) 20 21/** 22 * struct efx_tc_mac_pedit_action - mac pedit action fields 23 * 24 * @h_addr: mac address field of ethernet header 25 * @linkage: rhashtable reference 26 * @ref: reference count 27 * @fw_id: index of this entry in firmware MAC address table 28 * 29 * MAC address edits are indirected through a table in the hardware 30 */ 31struct efx_tc_mac_pedit_action { 32 u8 h_addr[ETH_ALEN]; 33 struct rhash_head linkage; 34 refcount_t ref; 35 u32 fw_id; /* index of this entry in firmware MAC address table */ 36}; 37 38static inline bool efx_ipv6_addr_all_ones(struct in6_addr *addr) 39{ 40 return !memchr_inv(addr, 0xff, sizeof(*addr)); 41} 42 43struct efx_tc_encap_action; /* see tc_encap_actions.h */ 44 45/** 46 * struct efx_tc_action_set - collection of tc action fields 47 * 48 * @vlan_push: the number of vlan headers to push 49 * @vlan_pop: the number of vlan headers to pop 50 * @decap: used to indicate a tunnel header decapsulation should take place 51 * @do_nat: perform NAT/NPT with values returned by conntrack match 52 * @do_ttl_dec: used to indicate IP TTL / Hop Limit should be decremented 53 * @deliver: used to indicate a deliver action should take place 54 * @vlan_tci: tci fields for vlan push actions 55 * @vlan_proto: ethernet types for vlan push actions 56 * @count: counter mapping 57 * @encap_md: encap entry in tc_encap_ht table 58 * @encap_user: linked list of encap users (encap_md->users) 59 * @user: owning action-set-list. Only populated if @encap_md is; used by efx_tc_update_encap() fallback handling 60 * @count_user: linked list of counter users (counter->users) 61 * @dest_mport: destination mport 62 * @src_mac: source mac entry in tc_mac_ht table 63 * @dst_mac: destination mac entry in tc_mac_ht table 64 * @fw_id: index of this entry in firmware actions table 65 * @list: linked list of tc actions 66 * 67 */ 68struct efx_tc_action_set { 69 u16 vlan_push:2; 70 u16 vlan_pop:2; 71 u16 decap:1; 72 u16 do_nat:1; 73 u16 do_ttl_dec:1; 74 u16 deliver:1; 75 __be16 vlan_tci[2]; 76 __be16 vlan_proto[2]; 77 struct efx_tc_counter_index *count; 78 struct efx_tc_encap_action *encap_md; 79 struct list_head encap_user; 80 struct efx_tc_action_set_list *user; 81 struct list_head count_user; 82 u32 dest_mport; 83 struct efx_tc_mac_pedit_action *src_mac; 84 struct efx_tc_mac_pedit_action *dst_mac; 85 u32 fw_id; 86 struct list_head list; 87}; 88 89struct efx_tc_match_fields { 90 /* L1 */ 91 u32 ingress_port; 92 u8 recirc_id; /* mapped from (u32) TC chain_index to smaller space */ 93 /* L2 (inner when encap) */ 94 __be16 eth_proto; 95 __be16 vlan_tci[2], vlan_proto[2]; 96 u8 eth_saddr[ETH_ALEN], eth_daddr[ETH_ALEN]; 97 /* L3 (when IP) */ 98 u8 ip_proto, ip_tos, ip_ttl; 99 __be32 src_ip, dst_ip; 100#ifdef CONFIG_IPV6 101 struct in6_addr src_ip6, dst_ip6; 102#endif 103 bool ip_frag, ip_firstfrag; 104 /* L4 */ 105 __be16 l4_sport, l4_dport; /* Ports (UDP, TCP) */ 106 __be16 tcp_flags; 107 bool tcp_syn_fin_rst; /* true if ANY of SYN/FIN/RST are set */ 108 /* Encap. The following are *outer* fields. Note that there are no 109 * outer eth (L2) fields; this is because TC doesn't have them. 110 */ 111 __be32 enc_src_ip, enc_dst_ip; 112 struct in6_addr enc_src_ip6, enc_dst_ip6; 113 u8 enc_ip_tos, enc_ip_ttl; 114 __be16 enc_sport, enc_dport; 115 __be32 enc_keyid; /* e.g. VNI, VSID */ 116 /* Conntrack. */ 117 u16 ct_state_trk:1, ct_state_est:1; 118 u32 ct_mark; 119 u16 ct_zone; 120}; 121 122static inline bool efx_tc_match_is_encap(const struct efx_tc_match_fields *mask) 123{ 124 return mask->enc_src_ip || mask->enc_dst_ip || 125 !ipv6_addr_any(&mask->enc_src_ip6) || 126 !ipv6_addr_any(&mask->enc_dst_ip6) || mask->enc_ip_tos || 127 mask->enc_ip_ttl || mask->enc_sport || mask->enc_dport; 128} 129 130/** 131 * enum efx_tc_em_pseudo_type - &struct efx_tc_encap_match pseudo type 132 * 133 * These are used to classify "pseudo" encap matches, which don't refer 134 * to an entry in hardware but rather indicate that a section of the 135 * match space is in use by another Outer Rule. 136 * 137 * @EFX_TC_EM_DIRECT: real HW entry in Outer Rule table; not a pseudo. 138 * Hardware index in &struct efx_tc_encap_match.fw_id is valid. 139 * @EFX_TC_EM_PSEUDO_MASK: registered by an encap match which includes a 140 * match on an optional field (currently ip_tos and/or udp_sport), 141 * to prevent an overlapping encap match _without_ optional fields. 142 * The pseudo encap match may be referenced again by an encap match 143 * with different values for these fields, but all masks must match the 144 * first (stored in our child_* fields). 145 * @EFX_TC_EM_PSEUDO_OR: registered by an fLHS rule that fits in the OR 146 * table. The &struct efx_tc_lhs_rule already holds the HW OR entry. 147 * Only one reference to this encap match may exist. 148 */ 149enum efx_tc_em_pseudo_type { 150 EFX_TC_EM_DIRECT, 151 EFX_TC_EM_PSEUDO_MASK, 152 EFX_TC_EM_PSEUDO_OR, 153}; 154 155struct efx_tc_encap_match { 156 __be32 src_ip, dst_ip; 157 struct in6_addr src_ip6, dst_ip6; 158 __be16 udp_dport; 159 __be16 udp_sport, udp_sport_mask; 160 u8 ip_tos, ip_tos_mask; 161 struct rhash_head linkage; 162 enum efx_encap_type tun_type; 163 u8 child_ip_tos_mask; 164 __be16 child_udp_sport_mask; 165 refcount_t ref; 166 enum efx_tc_em_pseudo_type type; 167 u32 fw_id; /* index of this entry in firmware encap match table */ 168 struct efx_tc_encap_match *pseudo; /* Referenced pseudo EM if needed */ 169}; 170 171struct efx_tc_recirc_id { 172 u32 chain_index; 173 struct net_device *net_dev; 174 struct rhash_head linkage; 175 refcount_t ref; 176 u8 fw_id; /* index allocated for use in the MAE */ 177}; 178 179struct efx_tc_match { 180 struct efx_tc_match_fields value; 181 struct efx_tc_match_fields mask; 182 struct efx_tc_encap_match *encap; 183 struct efx_tc_recirc_id *rid; 184}; 185 186struct efx_tc_action_set_list { 187 struct list_head list; 188 u32 fw_id; 189}; 190 191struct efx_tc_lhs_action { 192 enum efx_encap_type tun_type; 193 struct efx_tc_recirc_id *rid; 194 struct efx_tc_ct_zone *zone; 195 struct efx_tc_counter_index *count; 196}; 197 198struct efx_tc_flow_rule { 199 unsigned long cookie; 200 struct rhash_head linkage; 201 struct efx_tc_match match; 202 struct efx_tc_action_set_list acts; 203 struct efx_tc_action_set_list *fallback; /* what to use when unready? */ 204 u32 fw_id; 205}; 206 207struct efx_tc_lhs_rule { 208 unsigned long cookie; 209 struct efx_tc_match match; 210 struct efx_tc_lhs_action lhs_act; 211 struct rhash_head linkage; 212 u32 fw_id; 213 bool is_ar; /* Action Rule (for OR-AR-CT-AR sequence) */ 214}; 215 216enum efx_tc_rule_prios { 217 EFX_TC_PRIO_TC, /* Rule inserted by TC */ 218 EFX_TC_PRIO_DFLT, /* Default switch rule; one of efx_tc_default_rules */ 219 EFX_TC_PRIO__NUM 220}; 221 222struct efx_tc_table_field_fmt { 223 u16 field_id; 224 u16 lbn; 225 u16 width; 226 u8 masking; 227 u8 scheme; 228}; 229 230struct efx_tc_table_desc { 231 u16 type; 232 u16 key_width; 233 u16 resp_width; 234 u16 n_keys; 235 u16 n_resps; 236 u16 n_prios; 237 u8 flags; 238 u8 scheme; 239 struct efx_tc_table_field_fmt *keys; 240 struct efx_tc_table_field_fmt *resps; 241}; 242 243struct efx_tc_table_ct { /* TABLE_ID_CONNTRACK_TABLE */ 244 struct efx_tc_table_desc desc; 245 bool hooked; 246 struct { /* indices of named fields within @desc.keys */ 247 u8 eth_proto_idx; 248 u8 ip_proto_idx; 249 u8 src_ip_idx; /* either v4 or v6 */ 250 u8 dst_ip_idx; 251 u8 l4_sport_idx; 252 u8 l4_dport_idx; 253 u8 zone_idx; /* for TABLE_FIELD_ID_DOMAIN */ 254 } keys; 255 struct { /* indices of named fields within @desc.resps */ 256 u8 dnat_idx; 257 u8 nat_ip_idx; 258 u8 l4_natport_idx; 259 u8 mark_idx; 260 u8 counter_id_idx; 261 } resps; 262}; 263 264/** 265 * struct efx_tc_state - control plane data for TC offload 266 * 267 * @caps: MAE capabilities reported by MCDI 268 * @block_list: List of &struct efx_tc_block_binding 269 * @mutex: Used to serialise operations on TC hashtables 270 * @counter_ht: Hashtable of TC counters (FW IDs and counter values) 271 * @counter_id_ht: Hashtable mapping TC counter cookies to counters 272 * @encap_ht: Hashtable of TC encap actions 273 * @mac_ht: Hashtable of MAC address entries (for pedits) 274 * @encap_match_ht: Hashtable of TC encap matches 275 * @match_action_ht: Hashtable of TC match-action rules 276 * @lhs_rule_ht: Hashtable of TC left-hand (act ct & goto chain) rules 277 * @ct_zone_ht: Hashtable of TC conntrack flowtable bindings 278 * @ct_ht: Hashtable of TC conntrack flow entries 279 * @neigh_ht: Hashtable of neighbour watches (&struct efx_neigh_binder) 280 * @recirc_ht: Hashtable of recirculation ID mappings (&struct efx_tc_recirc_id) 281 * @recirc_ida: Recirculation ID allocator 282 * @meta_ct: MAE table layout for conntrack table 283 * @reps_mport_id: MAE port allocated for representor RX 284 * @reps_filter_uc: VNIC filter for representor unicast RX (promisc) 285 * @reps_filter_mc: VNIC filter for representor multicast RX (allmulti) 286 * @reps_mport_vport_id: vport_id for representor RX filters 287 * @flush_counters: counters have been stopped, waiting for drain 288 * @flush_gen: final generation count per type array as reported by 289 * MC_CMD_MAE_COUNTERS_STREAM_STOP 290 * @seen_gen: most recent generation count per type as seen by efx_tc_rx() 291 * @flush_wq: wait queue used by efx_mae_stop_counters() to wait for 292 * MAE counters RXQ to finish draining 293 * @dflt: Match-action rules for default switching; at priority 294 * %EFX_TC_PRIO_DFLT. Named by *ingress* port 295 * @dflt.pf: rule for traffic ingressing from PF (egresses to wire) 296 * @dflt.wire: rule for traffic ingressing from wire (egresses to PF) 297 * @facts: Fallback action-set-lists for unready rules. Named by *egress* port 298 * @facts.pf: action-set-list for unready rules on PF netdev, hence applying to 299 * traffic from wire, and egressing to PF 300 * @facts.reps: action-set-list for unready rules on representors, hence 301 * applying to traffic from representees, and egressing to the reps mport 302 * @up: have TC datastructures been set up? 303 */ 304struct efx_tc_state { 305 struct mae_caps *caps; 306 struct list_head block_list; 307 struct mutex mutex; 308 struct rhashtable counter_ht; 309 struct rhashtable counter_id_ht; 310 struct rhashtable encap_ht; 311 struct rhashtable mac_ht; 312 struct rhashtable encap_match_ht; 313 struct rhashtable match_action_ht; 314 struct rhashtable lhs_rule_ht; 315 struct rhashtable ct_zone_ht; 316 struct rhashtable ct_ht; 317 struct rhashtable neigh_ht; 318 struct rhashtable recirc_ht; 319 struct ida recirc_ida; 320 struct efx_tc_table_ct meta_ct; 321 u32 reps_mport_id, reps_mport_vport_id; 322 s32 reps_filter_uc, reps_filter_mc; 323 bool flush_counters; 324 u32 flush_gen[EFX_TC_COUNTER_TYPE_MAX]; 325 u32 seen_gen[EFX_TC_COUNTER_TYPE_MAX]; 326 wait_queue_head_t flush_wq; 327 struct { 328 struct efx_tc_flow_rule pf; 329 struct efx_tc_flow_rule wire; 330 } dflt; 331 struct { 332 struct efx_tc_action_set_list pf; 333 struct efx_tc_action_set_list reps; 334 } facts; 335 bool up; 336}; 337 338struct efx_rep; 339 340enum efx_encap_type efx_tc_indr_netdev_type(struct net_device *net_dev); 341struct efx_rep *efx_tc_flower_lookup_efv(struct efx_nic *efx, 342 struct net_device *dev); 343s64 efx_tc_flower_external_mport(struct efx_nic *efx, struct efx_rep *efv); 344int efx_tc_configure_default_rule_rep(struct efx_rep *efv); 345void efx_tc_deconfigure_default_rule(struct efx_nic *efx, 346 struct efx_tc_flow_rule *rule); 347int efx_tc_flower(struct efx_nic *efx, struct net_device *net_dev, 348 struct flow_cls_offload *tc, struct efx_rep *efv); 349 350int efx_tc_insert_rep_filters(struct efx_nic *efx); 351void efx_tc_remove_rep_filters(struct efx_nic *efx); 352 353int efx_init_tc(struct efx_nic *efx); 354void efx_fini_tc(struct efx_nic *efx); 355 356int efx_init_struct_tc(struct efx_nic *efx); 357void efx_fini_struct_tc(struct efx_nic *efx); 358 359#endif /* EFX_TC_H */ 360