/* 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 .
*/
#ifndef EFX_TC_H
#define EFX_TC_H
#include <net/flow_offload.h>
#include <linux/rhashtable.h>
#include "net_driver.h"
#include "tc_counters.h"
#define IS_ALL_ONES(v) (!(typeof (v))~(v))
/**
* 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 */
};
static inline bool efx_ipv6_addr_all_ones(struct in6_addr *addr)
{
return !memchr_inv(addr, 0 xff, sizeof (*addr));
}
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;
};
static inline bool efx_tc_match_is_encap(const struct efx_tc_match_fields *mask)
{
return mask->enc_src_ip || mask->enc_dst_ip ||
!ipv6_addr_any(&mask->enc_src_ip6) ||
!ipv6_addr_any(&mask->enc_dst_ip6) || mask->enc_ip_tos ||
mask->enc_ip_ttl || mask->enc_sport || mask->enc_dport;
}
/**
* 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_match {
struct efx_tc_match_fields value;
struct efx_tc_match_fields mask;
struct efx_tc_encap_match *encap;
struct efx_tc_recirc_id *rid;
};
struct efx_tc_action_set_list {
struct list_head list;
u32 fw_id;
};
struct efx_tc_lhs_action {
enum efx_encap_type tun_type;
struct efx_tc_recirc_id *rid;
struct efx_tc_ct_zone *zone;
struct efx_tc_counter_index *count;
};
struct efx_tc_flow_rule {
unsigned long cookie;
struct rhash_head linkage;
struct efx_tc_match match;
struct efx_tc_action_set_list acts;
struct efx_tc_action_set_list *fallback; /* what to use when unready? */
u32 fw_id;
};
struct efx_tc_lhs_rule {
unsigned long cookie;
struct efx_tc_match match;
struct efx_tc_lhs_action lhs_act;
struct rhash_head linkage;
u32 fw_id;
bool is_ar; /* Action Rule (for OR-AR-CT-AR sequence) */
};
enum efx_tc_rule_prios {
EFX_TC_PRIO_TC, /* Rule inserted by TC */
EFX_TC_PRIO_DFLT, /* Default switch rule; one of efx_tc_default_rules */
EFX_TC_PRIO__NUM
};
struct efx_tc_table_field_fmt {
u16 field_id;
u16 lbn;
u16 width;
u8 masking;
u8 scheme;
};
struct efx_tc_table_desc {
u16 type;
u16 key_width;
u16 resp_width;
u16 n_keys;
u16 n_resps;
u16 n_prios;
u8 flags;
u8 scheme;
struct efx_tc_table_field_fmt *keys;
struct efx_tc_table_field_fmt *resps;
};
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;
};
struct efx_rep;
enum efx_encap_type efx_tc_indr_netdev_type(struct net_device *net_dev);
struct efx_rep *efx_tc_flower_lookup_efv(struct efx_nic *efx,
struct net_device *dev);
s64 efx_tc_flower_external_mport(struct efx_nic *efx, struct efx_rep *efv);
int efx_tc_configure_default_rule_rep(struct efx_rep *efv);
void efx_tc_deconfigure_default_rule(struct efx_nic *efx,
struct efx_tc_flow_rule *rule);
int efx_tc_flower(struct efx_nic *efx, struct net_device *net_dev,
struct flow_cls_offload *tc, struct efx_rep *efv);
int efx_tc_insert_rep_filters(struct efx_nic *efx);
void efx_tc_remove_rep_filters(struct efx_nic *efx);
int efx_init_tc(struct efx_nic *efx);
void efx_fini_tc(struct efx_nic *efx);
int efx_init_struct_tc(struct efx_nic *efx);
void efx_fini_struct_tc(struct efx_nic *efx);
#endif /* EFX_TC_H */
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