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 static inline bool efx_ipv6_addr_all_ones(struct in6_addr *addr) 22 { 23 return !memchr_inv(addr, 0xff, sizeof(*addr)); 24 } 25 26 struct efx_tc_encap_action; /* see tc_encap_actions.h */ 27 28 struct efx_tc_action_set { 29 u16 vlan_push:2; 30 u16 vlan_pop:2; 31 u16 decap:1; 32 u16 deliver:1; 33 __be16 vlan_tci[2]; /* TCIs for vlan_push */ 34 __be16 vlan_proto[2]; /* Ethertypes for vlan_push */ 35 struct efx_tc_counter_index *count; 36 struct efx_tc_encap_action *encap_md; /* entry in tc_encap_ht table */ 37 struct list_head encap_user; /* entry on encap_md->users list */ 38 struct efx_tc_action_set_list *user; /* Only populated if encap_md */ 39 struct list_head count_user; /* entry on counter->users list, if encap */ 40 u32 dest_mport; 41 u32 fw_id; /* index of this entry in firmware actions table */ 42 struct list_head list; 43 }; 44 45 struct efx_tc_match_fields { 46 /* L1 */ 47 u32 ingress_port; 48 u8 recirc_id; 49 /* L2 (inner when encap) */ 50 __be16 eth_proto; 51 __be16 vlan_tci[2], vlan_proto[2]; 52 u8 eth_saddr[ETH_ALEN], eth_daddr[ETH_ALEN]; 53 /* L3 (when IP) */ 54 u8 ip_proto, ip_tos, ip_ttl; 55 __be32 src_ip, dst_ip; 56 #ifdef CONFIG_IPV6 57 struct in6_addr src_ip6, dst_ip6; 58 #endif 59 bool ip_frag, ip_firstfrag; 60 /* L4 */ 61 __be16 l4_sport, l4_dport; /* Ports (UDP, TCP) */ 62 __be16 tcp_flags; 63 /* Encap. The following are *outer* fields. Note that there are no 64 * outer eth (L2) fields; this is because TC doesn't have them. 65 */ 66 __be32 enc_src_ip, enc_dst_ip; 67 struct in6_addr enc_src_ip6, enc_dst_ip6; 68 u8 enc_ip_tos, enc_ip_ttl; 69 __be16 enc_sport, enc_dport; 70 __be32 enc_keyid; /* e.g. VNI, VSID */ 71 }; 72 73 static inline bool efx_tc_match_is_encap(const struct efx_tc_match_fields *mask) 74 { 75 return mask->enc_src_ip || mask->enc_dst_ip || 76 !ipv6_addr_any(&mask->enc_src_ip6) || 77 !ipv6_addr_any(&mask->enc_dst_ip6) || mask->enc_ip_tos || 78 mask->enc_ip_ttl || mask->enc_sport || mask->enc_dport; 79 } 80 81 /** 82 * enum efx_tc_em_pseudo_type - &struct efx_tc_encap_match pseudo type 83 * 84 * These are used to classify "pseudo" encap matches, which don't refer 85 * to an entry in hardware but rather indicate that a section of the 86 * match space is in use by another Outer Rule. 87 * 88 * @EFX_TC_EM_DIRECT: real HW entry in Outer Rule table; not a pseudo. 89 * Hardware index in &struct efx_tc_encap_match.fw_id is valid. 90 * @EFX_TC_EM_PSEUDO_MASK: registered by an encap match which includes a 91 * match on an optional field (currently ip_tos and/or udp_sport), 92 * to prevent an overlapping encap match _without_ optional fields. 93 * The pseudo encap match may be referenced again by an encap match 94 * with different values for these fields, but all masks must match the 95 * first (stored in our child_* fields). 96 */ 97 enum efx_tc_em_pseudo_type { 98 EFX_TC_EM_DIRECT, 99 EFX_TC_EM_PSEUDO_MASK, 100 }; 101 102 struct efx_tc_encap_match { 103 __be32 src_ip, dst_ip; 104 struct in6_addr src_ip6, dst_ip6; 105 __be16 udp_dport; 106 __be16 udp_sport, udp_sport_mask; 107 u8 ip_tos, ip_tos_mask; 108 struct rhash_head linkage; 109 enum efx_encap_type tun_type; 110 u8 child_ip_tos_mask; 111 __be16 child_udp_sport_mask; 112 refcount_t ref; 113 enum efx_tc_em_pseudo_type type; 114 u32 fw_id; /* index of this entry in firmware encap match table */ 115 struct efx_tc_encap_match *pseudo; /* Referenced pseudo EM if needed */ 116 }; 117 118 struct efx_tc_match { 119 struct efx_tc_match_fields value; 120 struct efx_tc_match_fields mask; 121 struct efx_tc_encap_match *encap; 122 }; 123 124 struct efx_tc_action_set_list { 125 struct list_head list; 126 u32 fw_id; 127 }; 128 129 struct efx_tc_flow_rule { 130 unsigned long cookie; 131 struct rhash_head linkage; 132 struct efx_tc_match match; 133 struct efx_tc_action_set_list acts; 134 struct efx_tc_action_set_list *fallback; /* what to use when unready? */ 135 u32 fw_id; 136 }; 137 138 enum efx_tc_rule_prios { 139 EFX_TC_PRIO_TC, /* Rule inserted by TC */ 140 EFX_TC_PRIO_DFLT, /* Default switch rule; one of efx_tc_default_rules */ 141 EFX_TC_PRIO__NUM 142 }; 143 144 struct efx_tc_table_field_fmt { 145 u16 field_id; 146 u16 lbn; 147 u16 width; 148 u8 masking; 149 u8 scheme; 150 }; 151 152 struct efx_tc_table_desc { 153 u16 type; 154 u16 key_width; 155 u16 resp_width; 156 u16 n_keys; 157 u16 n_resps; 158 u16 n_prios; 159 u8 flags; 160 u8 scheme; 161 struct efx_tc_table_field_fmt *keys; 162 struct efx_tc_table_field_fmt *resps; 163 }; 164 165 struct efx_tc_table_ct { /* TABLE_ID_CONNTRACK_TABLE */ 166 struct efx_tc_table_desc desc; 167 bool hooked; 168 struct { /* indices of named fields within @desc.keys */ 169 u8 eth_proto_idx; 170 u8 ip_proto_idx; 171 u8 src_ip_idx; /* either v4 or v6 */ 172 u8 dst_ip_idx; 173 u8 l4_sport_idx; 174 u8 l4_dport_idx; 175 u8 zone_idx; /* for TABLE_FIELD_ID_DOMAIN */ 176 } keys; 177 struct { /* indices of named fields within @desc.resps */ 178 u8 dnat_idx; 179 u8 nat_ip_idx; 180 u8 l4_natport_idx; 181 u8 mark_idx; 182 u8 counter_id_idx; 183 } resps; 184 }; 185 186 /** 187 * struct efx_tc_state - control plane data for TC offload 188 * 189 * @caps: MAE capabilities reported by MCDI 190 * @block_list: List of &struct efx_tc_block_binding 191 * @mutex: Used to serialise operations on TC hashtables 192 * @counter_ht: Hashtable of TC counters (FW IDs and counter values) 193 * @counter_id_ht: Hashtable mapping TC counter cookies to counters 194 * @encap_ht: Hashtable of TC encap actions 195 * @encap_match_ht: Hashtable of TC encap matches 196 * @match_action_ht: Hashtable of TC match-action rules 197 * @ct_zone_ht: Hashtable of TC conntrack flowtable bindings 198 * @ct_ht: Hashtable of TC conntrack flow entries 199 * @neigh_ht: Hashtable of neighbour watches (&struct efx_neigh_binder) 200 * @meta_ct: MAE table layout for conntrack table 201 * @reps_mport_id: MAE port allocated for representor RX 202 * @reps_filter_uc: VNIC filter for representor unicast RX (promisc) 203 * @reps_filter_mc: VNIC filter for representor multicast RX (allmulti) 204 * @reps_mport_vport_id: vport_id for representor RX filters 205 * @flush_counters: counters have been stopped, waiting for drain 206 * @flush_gen: final generation count per type array as reported by 207 * MC_CMD_MAE_COUNTERS_STREAM_STOP 208 * @seen_gen: most recent generation count per type as seen by efx_tc_rx() 209 * @flush_wq: wait queue used by efx_mae_stop_counters() to wait for 210 * MAE counters RXQ to finish draining 211 * @dflt: Match-action rules for default switching; at priority 212 * %EFX_TC_PRIO_DFLT. Named by *ingress* port 213 * @dflt.pf: rule for traffic ingressing from PF (egresses to wire) 214 * @dflt.wire: rule for traffic ingressing from wire (egresses to PF) 215 * @facts: Fallback action-set-lists for unready rules. Named by *egress* port 216 * @facts.pf: action-set-list for unready rules on PF netdev, hence applying to 217 * traffic from wire, and egressing to PF 218 * @facts.reps: action-set-list for unready rules on representors, hence 219 * applying to traffic from representees, and egressing to the reps mport 220 * @up: have TC datastructures been set up? 221 */ 222 struct efx_tc_state { 223 struct mae_caps *caps; 224 struct list_head block_list; 225 struct mutex mutex; 226 struct rhashtable counter_ht; 227 struct rhashtable counter_id_ht; 228 struct rhashtable encap_ht; 229 struct rhashtable encap_match_ht; 230 struct rhashtable match_action_ht; 231 struct rhashtable ct_zone_ht; 232 struct rhashtable ct_ht; 233 struct rhashtable neigh_ht; 234 struct efx_tc_table_ct meta_ct; 235 u32 reps_mport_id, reps_mport_vport_id; 236 s32 reps_filter_uc, reps_filter_mc; 237 bool flush_counters; 238 u32 flush_gen[EFX_TC_COUNTER_TYPE_MAX]; 239 u32 seen_gen[EFX_TC_COUNTER_TYPE_MAX]; 240 wait_queue_head_t flush_wq; 241 struct { 242 struct efx_tc_flow_rule pf; 243 struct efx_tc_flow_rule wire; 244 } dflt; 245 struct { 246 struct efx_tc_action_set_list pf; 247 struct efx_tc_action_set_list reps; 248 } facts; 249 bool up; 250 }; 251 252 struct efx_rep; 253 254 enum efx_encap_type efx_tc_indr_netdev_type(struct net_device *net_dev); 255 struct efx_rep *efx_tc_flower_lookup_efv(struct efx_nic *efx, 256 struct net_device *dev); 257 s64 efx_tc_flower_external_mport(struct efx_nic *efx, struct efx_rep *efv); 258 int efx_tc_configure_default_rule_rep(struct efx_rep *efv); 259 void efx_tc_deconfigure_default_rule(struct efx_nic *efx, 260 struct efx_tc_flow_rule *rule); 261 int efx_tc_flower(struct efx_nic *efx, struct net_device *net_dev, 262 struct flow_cls_offload *tc, struct efx_rep *efv); 263 264 int efx_tc_insert_rep_filters(struct efx_nic *efx); 265 void efx_tc_remove_rep_filters(struct efx_nic *efx); 266 267 int efx_init_tc(struct efx_nic *efx); 268 void efx_fini_tc(struct efx_nic *efx); 269 270 int efx_init_struct_tc(struct efx_nic *efx); 271 void efx_fini_struct_tc(struct efx_nic *efx); 272 273 #endif /* EFX_TC_H */ 274