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