/* SPDX-License-Identifier: GPL-2.0-only */ /**************************************************************************** * Driver for Solarflare network controllers and boards * Copyright 2019 Solarflare Communications Inc. * Copyright 2020-2022 Xilinx Inc. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation, incorporated herein by reference.
*/
/** * struct efx_tc_mac_pedit_action - mac pedit action fields * * @h_addr: mac address field of ethernet header * @linkage: rhashtable reference * @ref: reference count * @fw_id: index of this entry in firmware MAC address table * * MAC address edits are indirected through a table in the hardware
*/ struct efx_tc_mac_pedit_action {
u8 h_addr[ETH_ALEN]; struct rhash_head linkage;
refcount_t ref;
u32 fw_id; /* index of this entry in firmware MAC address table */
};
struct efx_tc_encap_action; /* see tc_encap_actions.h */
/** * struct efx_tc_action_set - collection of tc action fields * * @vlan_push: the number of vlan headers to push * @vlan_pop: the number of vlan headers to pop * @decap: used to indicate a tunnel header decapsulation should take place * @do_nat: perform NAT/NPT with values returned by conntrack match * @do_ttl_dec: used to indicate IP TTL / Hop Limit should be decremented * @deliver: used to indicate a deliver action should take place * @vlan_tci: tci fields for vlan push actions * @vlan_proto: ethernet types for vlan push actions * @count: counter mapping * @encap_md: encap entry in tc_encap_ht table * @encap_user: linked list of encap users (encap_md->users) * @user: owning action-set-list. Only populated if @encap_md is; used by efx_tc_update_encap() fallback handling * @count_user: linked list of counter users (counter->users) * @dest_mport: destination mport * @src_mac: source mac entry in tc_mac_ht table * @dst_mac: destination mac entry in tc_mac_ht table * @fw_id: index of this entry in firmware actions table * @list: linked list of tc actions *
*/ struct efx_tc_action_set {
u16 vlan_push:2;
u16 vlan_pop:2;
u16 decap:1;
u16 do_nat:1;
u16 do_ttl_dec:1;
u16 deliver:1;
__be16 vlan_tci[2];
__be16 vlan_proto[2]; struct efx_tc_counter_index *count; struct efx_tc_encap_action *encap_md; struct list_head encap_user; struct efx_tc_action_set_list *user; struct list_head count_user;
u32 dest_mport; struct efx_tc_mac_pedit_action *src_mac; struct efx_tc_mac_pedit_action *dst_mac;
u32 fw_id; struct list_head list;
};
struct efx_tc_match_fields { /* L1 */
u32 ingress_port;
u8 recirc_id; /* mapped from (u32) TC chain_index to smaller space */ /* L2 (inner when encap) */
__be16 eth_proto;
__be16 vlan_tci[2], vlan_proto[2];
u8 eth_saddr[ETH_ALEN], eth_daddr[ETH_ALEN]; /* L3 (when IP) */
u8 ip_proto, ip_tos, ip_ttl;
__be32 src_ip, dst_ip; #ifdef CONFIG_IPV6 struct in6_addr src_ip6, dst_ip6; #endif bool ip_frag, ip_firstfrag; /* L4 */
__be16 l4_sport, l4_dport; /* Ports (UDP, TCP) */
__be16 tcp_flags; bool tcp_syn_fin_rst; /* true if ANY of SYN/FIN/RST are set */ /* Encap. The following are *outer* fields. Note that there are no * outer eth (L2) fields; this is because TC doesn't have them.
*/
__be32 enc_src_ip, enc_dst_ip; struct in6_addr enc_src_ip6, enc_dst_ip6;
u8 enc_ip_tos, enc_ip_ttl;
__be16 enc_sport, enc_dport;
__be32 enc_keyid; /* e.g. VNI, VSID */ /* Conntrack. */
u16 ct_state_trk:1, ct_state_est:1;
u32 ct_mark;
u16 ct_zone;
};
/** * enum efx_tc_em_pseudo_type - &struct efx_tc_encap_match pseudo type * * These are used to classify "pseudo" encap matches, which don't refer * to an entry in hardware but rather indicate that a section of the * match space is in use by another Outer Rule. * * @EFX_TC_EM_DIRECT: real HW entry in Outer Rule table; not a pseudo. * Hardware index in &struct efx_tc_encap_match.fw_id is valid. * @EFX_TC_EM_PSEUDO_MASK: registered by an encap match which includes a * match on an optional field (currently ip_tos and/or udp_sport), * to prevent an overlapping encap match _without_ optional fields. * The pseudo encap match may be referenced again by an encap match * with different values for these fields, but all masks must match the * first (stored in our child_* fields). * @EFX_TC_EM_PSEUDO_OR: registered by an fLHS rule that fits in the OR * table. The &struct efx_tc_lhs_rule already holds the HW OR entry. * Only one reference to this encap match may exist.
*/ enum efx_tc_em_pseudo_type {
EFX_TC_EM_DIRECT,
EFX_TC_EM_PSEUDO_MASK,
EFX_TC_EM_PSEUDO_OR,
};
struct efx_tc_encap_match {
__be32 src_ip, dst_ip; struct in6_addr src_ip6, dst_ip6;
__be16 udp_dport;
__be16 udp_sport, udp_sport_mask;
u8 ip_tos, ip_tos_mask; struct rhash_head linkage; enum efx_encap_type tun_type;
u8 child_ip_tos_mask;
__be16 child_udp_sport_mask;
refcount_t ref; enum efx_tc_em_pseudo_type type;
u32 fw_id; /* index of this entry in firmware encap match table */ struct efx_tc_encap_match *pseudo; /* Referenced pseudo EM if needed */
};
struct efx_tc_recirc_id {
u32 chain_index; struct net_device *net_dev; struct rhash_head linkage;
refcount_t ref;
u8 fw_id; /* index allocated for use in the MAE */
};
struct efx_tc_table_ct { /* TABLE_ID_CONNTRACK_TABLE */ struct efx_tc_table_desc desc; bool hooked; struct { /* indices of named fields within @desc.keys */
u8 eth_proto_idx;
u8 ip_proto_idx;
u8 src_ip_idx; /* either v4 or v6 */
u8 dst_ip_idx;
u8 l4_sport_idx;
u8 l4_dport_idx;
u8 zone_idx; /* for TABLE_FIELD_ID_DOMAIN */
} keys; struct { /* indices of named fields within @desc.resps */
u8 dnat_idx;
u8 nat_ip_idx;
u8 l4_natport_idx;
u8 mark_idx;
u8 counter_id_idx;
} resps;
};
/** * struct efx_tc_state - control plane data for TC offload * * @caps: MAE capabilities reported by MCDI * @block_list: List of &struct efx_tc_block_binding * @mutex: Used to serialise operations on TC hashtables * @counter_ht: Hashtable of TC counters (FW IDs and counter values) * @counter_id_ht: Hashtable mapping TC counter cookies to counters * @encap_ht: Hashtable of TC encap actions * @mac_ht: Hashtable of MAC address entries (for pedits) * @encap_match_ht: Hashtable of TC encap matches * @match_action_ht: Hashtable of TC match-action rules * @lhs_rule_ht: Hashtable of TC left-hand (act ct & goto chain) rules * @ct_zone_ht: Hashtable of TC conntrack flowtable bindings * @ct_ht: Hashtable of TC conntrack flow entries * @neigh_ht: Hashtable of neighbour watches (&struct efx_neigh_binder) * @recirc_ht: Hashtable of recirculation ID mappings (&struct efx_tc_recirc_id) * @recirc_ida: Recirculation ID allocator * @meta_ct: MAE table layout for conntrack table * @reps_mport_id: MAE port allocated for representor RX * @reps_filter_uc: VNIC filter for representor unicast RX (promisc) * @reps_filter_mc: VNIC filter for representor multicast RX (allmulti) * @reps_mport_vport_id: vport_id for representor RX filters * @flush_counters: counters have been stopped, waiting for drain * @flush_gen: final generation count per type array as reported by * MC_CMD_MAE_COUNTERS_STREAM_STOP * @seen_gen: most recent generation count per type as seen by efx_tc_rx() * @flush_wq: wait queue used by efx_mae_stop_counters() to wait for * MAE counters RXQ to finish draining * @dflt: Match-action rules for default switching; at priority * %EFX_TC_PRIO_DFLT. Named by *ingress* port * @dflt.pf: rule for traffic ingressing from PF (egresses to wire) * @dflt.wire: rule for traffic ingressing from wire (egresses to PF) * @facts: Fallback action-set-lists for unready rules. Named by *egress* port * @facts.pf: action-set-list for unready rules on PF netdev, hence applying to * traffic from wire, and egressing to PF * @facts.reps: action-set-list for unready rules on representors, hence * applying to traffic from representees, and egressing to the reps mport * @up: have TC datastructures been set up?
*/ struct efx_tc_state { struct mae_caps *caps; struct list_head block_list; struct mutex mutex; struct rhashtable counter_ht; struct rhashtable counter_id_ht; struct rhashtable encap_ht; struct rhashtable mac_ht; struct rhashtable encap_match_ht; struct rhashtable match_action_ht; struct rhashtable lhs_rule_ht; struct rhashtable ct_zone_ht; struct rhashtable ct_ht; struct rhashtable neigh_ht; struct rhashtable recirc_ht; struct ida recirc_ida; struct efx_tc_table_ct meta_ct;
u32 reps_mport_id, reps_mport_vport_id;
s32 reps_filter_uc, reps_filter_mc; bool flush_counters;
u32 flush_gen[EFX_TC_COUNTER_TYPE_MAX];
u32 seen_gen[EFX_TC_COUNTER_TYPE_MAX];
wait_queue_head_t flush_wq; struct { struct efx_tc_flow_rule pf; struct efx_tc_flow_rule wire;
} dflt; struct { struct efx_tc_action_set_list pf; struct efx_tc_action_set_list reps;
} facts; bool up;
};
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