| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Edward Cree | 8364 | 96.39% | 42 | 79.25% |
| Ben Hutchings | 273 | 3.15% | 5 | 9.43% |
| Jonathan Cooper | 37 | 0.43% | 3 | 5.66% |
| Bert Kenward | 1 | 0.01% | 1 | 1.89% |
| Pieter Jansen van Vuuren | 1 | 0.01% | 1 | 1.89% |
| Thomas Gleixner | 1 | 0.01% | 1 | 1.89% |
| Total | 8677 | 53 |
// 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. */ #include <net/pkt_cls.h> #include <net/vxlan.h> #include <net/geneve.h> #include "tc.h" #include "tc_bindings.h" #include "tc_encap_actions.h" #include "mae.h" #include "ef100_rep.h" #include "efx.h" enum efx_encap_type efx_tc_indr_netdev_type(struct net_device *net_dev) { if (netif_is_vxlan(net_dev)) return EFX_ENCAP_TYPE_VXLAN; if (netif_is_geneve(net_dev)) return EFX_ENCAP_TYPE_GENEVE; return EFX_ENCAP_TYPE_NONE; } #define EFX_EFV_PF NULL /* Look up the representor information (efv) for a device. * May return NULL for the PF (us), or an error pointer for a device that * isn't supported as a TC offload endpoint */ struct efx_rep *efx_tc_flower_lookup_efv(struct efx_nic *efx, struct net_device *dev) { struct efx_rep *efv; if (!dev) return ERR_PTR(-EOPNOTSUPP); /* Is it us (the PF)? */ if (dev == efx->net_dev) return EFX_EFV_PF; /* Is it an efx vfrep at all? */ if (dev->netdev_ops != &efx_ef100_rep_netdev_ops) return ERR_PTR(-EOPNOTSUPP); /* Is it ours? We don't support TC rules that include another * EF100's netdevices (not even on another port of the same NIC). */ efv = netdev_priv(dev); if (efv->parent != efx) return ERR_PTR(-EOPNOTSUPP); return efv; } /* Convert a driver-internal vport ID into an internal device (PF or VF) */ static s64 efx_tc_flower_internal_mport(struct efx_nic *efx, struct efx_rep *efv) { u32 mport; if (IS_ERR(efv)) return PTR_ERR(efv); if (!efv) /* device is PF (us) */ efx_mae_mport_uplink(efx, &mport); else /* device is repr */ efx_mae_mport_mport(efx, efv->mport, &mport); return mport; } /* Convert a driver-internal vport ID into an external device (wire or VF) */ s64 efx_tc_flower_external_mport(struct efx_nic *efx, struct efx_rep *efv) { u32 mport; if (IS_ERR(efv)) return PTR_ERR(efv); if (!efv) /* device is PF (us) */ efx_mae_mport_wire(efx, &mport); else /* device is repr */ efx_mae_mport_mport(efx, efv->mport, &mport); return mport; } static const struct rhashtable_params efx_tc_encap_match_ht_params = { .key_len = offsetof(struct efx_tc_encap_match, linkage), .key_offset = 0, .head_offset = offsetof(struct efx_tc_encap_match, linkage), }; static const struct rhashtable_params efx_tc_match_action_ht_params = { .key_len = sizeof(unsigned long), .key_offset = offsetof(struct efx_tc_flow_rule, cookie), .head_offset = offsetof(struct efx_tc_flow_rule, linkage), }; static void efx_tc_free_action_set(struct efx_nic *efx, struct efx_tc_action_set *act, bool in_hw) { /* Failure paths calling this on the 'cursor' action set in_hw=false, * because if the alloc had succeeded we'd've put it in acts.list and * not still have it in act. */ if (in_hw) { efx_mae_free_action_set(efx, act->fw_id); /* in_hw is true iff we are on an acts.list; make sure to * remove ourselves from that list before we are freed. */ list_del(&act->list); } if (act->count) { spin_lock_bh(&act->count->cnt->lock); if (!list_empty(&act->count_user)) list_del(&act->count_user); spin_unlock_bh(&act->count->cnt->lock); efx_tc_flower_put_counter_index(efx, act->count); } if (act->encap_md) { list_del(&act->encap_user); efx_tc_flower_release_encap_md(efx, act->encap_md); } kfree(act); } static void efx_tc_free_action_set_list(struct efx_nic *efx, struct efx_tc_action_set_list *acts, bool in_hw) { struct efx_tc_action_set *act, *next; /* Failure paths set in_hw=false, because usually the acts didn't get * to efx_mae_alloc_action_set_list(); if they did, the failure tree * has a separate efx_mae_free_action_set_list() before calling us. */ if (in_hw) efx_mae_free_action_set_list(efx, acts); /* Any act that's on the list will be in_hw even if the list isn't */ list_for_each_entry_safe(act, next, &acts->list, list) efx_tc_free_action_set(efx, act, true); /* Don't kfree, as acts is embedded inside a struct efx_tc_flow_rule */ } /* Boilerplate for the simple 'copy a field' cases */ #define _MAP_KEY_AND_MASK(_name, _type, _tcget, _tcfield, _field) \ if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_##_name)) { \ struct flow_match_##_type fm; \ \ flow_rule_match_##_tcget(rule, &fm); \ match->value._field = fm.key->_tcfield; \ match->mask._field = fm.mask->_tcfield; \ } #define MAP_KEY_AND_MASK(_name, _type, _tcfield, _field) \ _MAP_KEY_AND_MASK(_name, _type, _type, _tcfield, _field) #define MAP_ENC_KEY_AND_MASK(_name, _type, _tcget, _tcfield, _field) \ _MAP_KEY_AND_MASK(ENC_##_name, _type, _tcget, _tcfield, _field) static int efx_tc_flower_parse_match(struct efx_nic *efx, struct flow_rule *rule, struct efx_tc_match *match, struct netlink_ext_ack *extack) { struct flow_dissector *dissector = rule->match.dissector; unsigned char ipv = 0; /* Owing to internal TC infelicities, the IPV6_ADDRS key might be set * even on IPv4 filters; so rather than relying on dissector->used_keys * we check the addr_type in the CONTROL key. If we don't find it (or * it's masked, which should never happen), we treat both IPV4_ADDRS * and IPV6_ADDRS as absent. */ if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) { struct flow_match_control fm; flow_rule_match_control(rule, &fm); if (IS_ALL_ONES(fm.mask->addr_type)) switch (fm.key->addr_type) { case FLOW_DISSECTOR_KEY_IPV4_ADDRS: ipv = 4; break; case FLOW_DISSECTOR_KEY_IPV6_ADDRS: ipv = 6; break; default: break; } if (fm.mask->flags & FLOW_DIS_IS_FRAGMENT) { match->value.ip_frag = fm.key->flags & FLOW_DIS_IS_FRAGMENT; match->mask.ip_frag = true; } if (fm.mask->flags & FLOW_DIS_FIRST_FRAG) { match->value.ip_firstfrag = fm.key->flags & FLOW_DIS_FIRST_FRAG; match->mask.ip_firstfrag = true; } if (fm.mask->flags & ~(FLOW_DIS_IS_FRAGMENT | FLOW_DIS_FIRST_FRAG)) { NL_SET_ERR_MSG_FMT_MOD(extack, "Unsupported match on control.flags %#x", fm.mask->flags); return -EOPNOTSUPP; } } if (dissector->used_keys & ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) | BIT(FLOW_DISSECTOR_KEY_BASIC) | BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) | BIT(FLOW_DISSECTOR_KEY_VLAN) | BIT(FLOW_DISSECTOR_KEY_CVLAN) | BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) | BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) | BIT(FLOW_DISSECTOR_KEY_PORTS) | BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) | BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) | BIT(FLOW_DISSECTOR_KEY_ENC_IP) | BIT(FLOW_DISSECTOR_KEY_ENC_PORTS) | BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) | BIT(FLOW_DISSECTOR_KEY_TCP) | BIT(FLOW_DISSECTOR_KEY_IP))) { NL_SET_ERR_MSG_FMT_MOD(extack, "Unsupported flower keys %#x", dissector->used_keys); return -EOPNOTSUPP; } MAP_KEY_AND_MASK(BASIC, basic, n_proto, eth_proto); /* Make sure we're IP if any L3/L4 keys used. */ if (!IS_ALL_ONES(match->mask.eth_proto) || !(match->value.eth_proto == htons(ETH_P_IP) || match->value.eth_proto == htons(ETH_P_IPV6))) if (dissector->used_keys & (BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) | BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) | BIT(FLOW_DISSECTOR_KEY_PORTS) | BIT(FLOW_DISSECTOR_KEY_IP) | BIT(FLOW_DISSECTOR_KEY_TCP))) { NL_SET_ERR_MSG_FMT_MOD(extack, "L3/L4 flower keys %#x require protocol ipv[46]", dissector->used_keys); return -EINVAL; } if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) { struct flow_match_vlan fm; flow_rule_match_vlan(rule, &fm); if (fm.mask->vlan_id || fm.mask->vlan_priority || fm.mask->vlan_tpid) { match->value.vlan_proto[0] = fm.key->vlan_tpid; match->mask.vlan_proto[0] = fm.mask->vlan_tpid; match->value.vlan_tci[0] = cpu_to_be16(fm.key->vlan_priority << 13 | fm.key->vlan_id); match->mask.vlan_tci[0] = cpu_to_be16(fm.mask->vlan_priority << 13 | fm.mask->vlan_id); } } if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CVLAN)) { struct flow_match_vlan fm; flow_rule_match_cvlan(rule, &fm); if (fm.mask->vlan_id || fm.mask->vlan_priority || fm.mask->vlan_tpid) { match->value.vlan_proto[1] = fm.key->vlan_tpid; match->mask.vlan_proto[1] = fm.mask->vlan_tpid; match->value.vlan_tci[1] = cpu_to_be16(fm.key->vlan_priority << 13 | fm.key->vlan_id); match->mask.vlan_tci[1] = cpu_to_be16(fm.mask->vlan_priority << 13 | fm.mask->vlan_id); } } if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) { struct flow_match_eth_addrs fm; flow_rule_match_eth_addrs(rule, &fm); ether_addr_copy(match->value.eth_saddr, fm.key->src); ether_addr_copy(match->value.eth_daddr, fm.key->dst); ether_addr_copy(match->mask.eth_saddr, fm.mask->src); ether_addr_copy(match->mask.eth_daddr, fm.mask->dst); } MAP_KEY_AND_MASK(BASIC, basic, ip_proto, ip_proto); /* Make sure we're TCP/UDP if any L4 keys used. */ if ((match->value.ip_proto != IPPROTO_UDP && match->value.ip_proto != IPPROTO_TCP) || !IS_ALL_ONES(match->mask.ip_proto)) if (dissector->used_keys & (BIT(FLOW_DISSECTOR_KEY_PORTS) | BIT(FLOW_DISSECTOR_KEY_TCP))) { NL_SET_ERR_MSG_FMT_MOD(extack, "L4 flower keys %#x require ipproto udp or tcp", dissector->used_keys); return -EINVAL; } MAP_KEY_AND_MASK(IP, ip, tos, ip_tos); MAP_KEY_AND_MASK(IP, ip, ttl, ip_ttl); if (ipv == 4) { MAP_KEY_AND_MASK(IPV4_ADDRS, ipv4_addrs, src, src_ip); MAP_KEY_AND_MASK(IPV4_ADDRS, ipv4_addrs, dst, dst_ip); } #ifdef CONFIG_IPV6 else if (ipv == 6) { MAP_KEY_AND_MASK(IPV6_ADDRS, ipv6_addrs, src, src_ip6); MAP_KEY_AND_MASK(IPV6_ADDRS, ipv6_addrs, dst, dst_ip6); } #endif MAP_KEY_AND_MASK(PORTS, ports, src, l4_sport); MAP_KEY_AND_MASK(PORTS, ports, dst, l4_dport); MAP_KEY_AND_MASK(TCP, tcp, flags, tcp_flags); if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_CONTROL)) { struct flow_match_control fm; flow_rule_match_enc_control(rule, &fm); if (fm.mask->flags) { NL_SET_ERR_MSG_FMT_MOD(extack, "Unsupported match on enc_control.flags %#x", fm.mask->flags); return -EOPNOTSUPP; } if (!IS_ALL_ONES(fm.mask->addr_type)) { NL_SET_ERR_MSG_FMT_MOD(extack, "Unsupported enc addr_type mask %u (key %u)", fm.mask->addr_type, fm.key->addr_type); return -EOPNOTSUPP; } switch (fm.key->addr_type) { case FLOW_DISSECTOR_KEY_IPV4_ADDRS: MAP_ENC_KEY_AND_MASK(IPV4_ADDRS, ipv4_addrs, enc_ipv4_addrs, src, enc_src_ip); MAP_ENC_KEY_AND_MASK(IPV4_ADDRS, ipv4_addrs, enc_ipv4_addrs, dst, enc_dst_ip); break; #ifdef CONFIG_IPV6 case FLOW_DISSECTOR_KEY_IPV6_ADDRS: MAP_ENC_KEY_AND_MASK(IPV6_ADDRS, ipv6_addrs, enc_ipv6_addrs, src, enc_src_ip6); MAP_ENC_KEY_AND_MASK(IPV6_ADDRS, ipv6_addrs, enc_ipv6_addrs, dst, enc_dst_ip6); break; #endif default: NL_SET_ERR_MSG_FMT_MOD(extack, "Unsupported enc addr_type %u (supported are IPv4, IPv6)", fm.key->addr_type); return -EOPNOTSUPP; } MAP_ENC_KEY_AND_MASK(IP, ip, enc_ip, tos, enc_ip_tos); MAP_ENC_KEY_AND_MASK(IP, ip, enc_ip, ttl, enc_ip_ttl); MAP_ENC_KEY_AND_MASK(PORTS, ports, enc_ports, src, enc_sport); MAP_ENC_KEY_AND_MASK(PORTS, ports, enc_ports, dst, enc_dport); MAP_ENC_KEY_AND_MASK(KEYID, enc_keyid, enc_keyid, keyid, enc_keyid); } else if (dissector->used_keys & (BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) | BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) | BIT(FLOW_DISSECTOR_KEY_ENC_IP) | BIT(FLOW_DISSECTOR_KEY_ENC_PORTS))) { NL_SET_ERR_MSG_FMT_MOD(extack, "Flower enc keys require enc_control (keys: %#x)", dissector->used_keys); return -EOPNOTSUPP; } return 0; } static void efx_tc_flower_release_encap_match(struct efx_nic *efx, struct efx_tc_encap_match *encap) { int rc; if (!refcount_dec_and_test(&encap->ref)) return; /* still in use */ if (encap->type == EFX_TC_EM_DIRECT) { rc = efx_mae_unregister_encap_match(efx, encap); if (rc) /* Display message but carry on and remove entry from our * SW tables, because there's not much we can do about it. */ netif_err(efx, drv, efx->net_dev, "Failed to release encap match %#x, rc %d\n", encap->fw_id, rc); } rhashtable_remove_fast(&efx->tc->encap_match_ht, &encap->linkage, efx_tc_encap_match_ht_params); if (encap->pseudo) efx_tc_flower_release_encap_match(efx, encap->pseudo); kfree(encap); } static int efx_tc_flower_record_encap_match(struct efx_nic *efx, struct efx_tc_match *match, enum efx_encap_type type, enum efx_tc_em_pseudo_type em_type, u8 child_ip_tos_mask, __be16 child_udp_sport_mask, struct netlink_ext_ack *extack) { struct efx_tc_encap_match *encap, *old, *pseudo = NULL; bool ipv6 = false; int rc; /* We require that the socket-defining fields (IP addrs and UDP dest * port) are present and exact-match. Other fields may only be used * if the field-set (and any masks) are the same for all encap * matches on the same <sip,dip,dport> tuple; this is enforced by * pseudo encap matches. */ if (match->mask.enc_dst_ip | match->mask.enc_src_ip) { if (!IS_ALL_ONES(match->mask.enc_dst_ip)) { NL_SET_ERR_MSG_MOD(extack, "Egress encap match is not exact on dst IP address"); return -EOPNOTSUPP; } if (!IS_ALL_ONES(match->mask.enc_src_ip)) { NL_SET_ERR_MSG_MOD(extack, "Egress encap match is not exact on src IP address"); return -EOPNOTSUPP; } #ifdef CONFIG_IPV6 if (!ipv6_addr_any(&match->mask.enc_dst_ip6) || !ipv6_addr_any(&match->mask.enc_src_ip6)) { NL_SET_ERR_MSG_MOD(extack, "Egress encap match on both IPv4 and IPv6, don't understand"); return -EOPNOTSUPP; } } else { ipv6 = true; if (!efx_ipv6_addr_all_ones(&match->mask.enc_dst_ip6)) { NL_SET_ERR_MSG_MOD(extack, "Egress encap match is not exact on dst IP address"); return -EOPNOTSUPP; } if (!efx_ipv6_addr_all_ones(&match->mask.enc_src_ip6)) { NL_SET_ERR_MSG_MOD(extack, "Egress encap match is not exact on src IP address"); return -EOPNOTSUPP; } #endif } if (!IS_ALL_ONES(match->mask.enc_dport)) { NL_SET_ERR_MSG_MOD(extack, "Egress encap match is not exact on dst UDP port"); return -EOPNOTSUPP; } if (match->mask.enc_sport || match->mask.enc_ip_tos) { struct efx_tc_match pmatch = *match; if (em_type == EFX_TC_EM_PSEUDO_MASK) { /* can't happen */ NL_SET_ERR_MSG_MOD(extack, "Bad recursion in egress encap match handler"); return -EOPNOTSUPP; } pmatch.value.enc_ip_tos = 0; pmatch.mask.enc_ip_tos = 0; pmatch.value.enc_sport = 0; pmatch.mask.enc_sport = 0; rc = efx_tc_flower_record_encap_match(efx, &pmatch, type, EFX_TC_EM_PSEUDO_MASK, match->mask.enc_ip_tos, match->mask.enc_sport, extack); if (rc) return rc; pseudo = pmatch.encap; } if (match->mask.enc_ip_ttl) { NL_SET_ERR_MSG_MOD(extack, "Egress encap match on IP TTL not supported"); rc = -EOPNOTSUPP; goto fail_pseudo; } rc = efx_mae_check_encap_match_caps(efx, ipv6, match->mask.enc_ip_tos, match->mask.enc_sport, extack); if (rc) goto fail_pseudo; encap = kzalloc(sizeof(*encap), GFP_USER); if (!encap) { rc = -ENOMEM; goto fail_pseudo; } encap->src_ip = match->value.enc_src_ip; encap->dst_ip = match->value.enc_dst_ip; #ifdef CONFIG_IPV6 encap->src_ip6 = match->value.enc_src_ip6; encap->dst_ip6 = match->value.enc_dst_ip6; #endif encap->udp_dport = match->value.enc_dport; encap->tun_type = type; encap->ip_tos = match->value.enc_ip_tos; encap->ip_tos_mask = match->mask.enc_ip_tos; encap->child_ip_tos_mask = child_ip_tos_mask; encap->udp_sport = match->value.enc_sport; encap->udp_sport_mask = match->mask.enc_sport; encap->child_udp_sport_mask = child_udp_sport_mask; encap->type = em_type; encap->pseudo = pseudo; old = rhashtable_lookup_get_insert_fast(&efx->tc->encap_match_ht, &encap->linkage, efx_tc_encap_match_ht_params); if (old) { /* don't need our new entry */ kfree(encap); if (pseudo) /* don't need our new pseudo either */ efx_tc_flower_release_encap_match(efx, pseudo); /* check old and new em_types are compatible */ switch (old->type) { case EFX_TC_EM_DIRECT: /* old EM is in hardware, so mustn't overlap with a * pseudo, but may be shared with another direct EM */ if (em_type == EFX_TC_EM_DIRECT) break; NL_SET_ERR_MSG_MOD(extack, "Pseudo encap match conflicts with existing direct entry"); return -EEXIST; case EFX_TC_EM_PSEUDO_MASK: /* old EM is protecting a ToS- or src port-qualified * filter, so may only be shared with another pseudo * for the same ToS and src port masks. */ if (em_type != EFX_TC_EM_PSEUDO_MASK) { NL_SET_ERR_MSG_FMT_MOD(extack, "%s encap match conflicts with existing pseudo(MASK) entry", em_type ? "Pseudo" : "Direct"); return -EEXIST; } if (child_ip_tos_mask != old->child_ip_tos_mask) { NL_SET_ERR_MSG_FMT_MOD(extack, "Pseudo encap match for TOS mask %#04x conflicts with existing pseudo(MASK) entry for TOS mask %#04x", child_ip_tos_mask, old->child_ip_tos_mask); return -EEXIST; } if (child_udp_sport_mask != old->child_udp_sport_mask) { NL_SET_ERR_MSG_FMT_MOD(extack, "Pseudo encap match for UDP src port mask %#x conflicts with existing pseudo(MASK) entry for mask %#x", child_udp_sport_mask, old->child_udp_sport_mask); return -EEXIST; } break; default: /* Unrecognised pseudo-type. Just say no */ NL_SET_ERR_MSG_FMT_MOD(extack, "%s encap match conflicts with existing pseudo(%d) entry", em_type ? "Pseudo" : "Direct", old->type); return -EEXIST; } /* check old and new tun_types are compatible */ if (old->tun_type != type) { NL_SET_ERR_MSG_FMT_MOD(extack, "Egress encap match with conflicting tun_type %u != %u", old->tun_type, type); return -EEXIST; } if (!refcount_inc_not_zero(&old->ref)) return -EAGAIN; /* existing entry found */ encap = old; } else { if (em_type == EFX_TC_EM_DIRECT) { rc = efx_mae_register_encap_match(efx, encap); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to record egress encap match in HW"); goto fail; } } refcount_set(&encap->ref, 1); } match->encap = encap; return 0; fail: rhashtable_remove_fast(&efx->tc->encap_match_ht, &encap->linkage, efx_tc_encap_match_ht_params); kfree(encap); fail_pseudo: if (pseudo) efx_tc_flower_release_encap_match(efx, pseudo); return rc; } static void efx_tc_delete_rule(struct efx_nic *efx, struct efx_tc_flow_rule *rule) { efx_mae_delete_rule(efx, rule->fw_id); /* Release entries in subsidiary tables */ efx_tc_free_action_set_list(efx, &rule->acts, true); if (rule->match.encap) efx_tc_flower_release_encap_match(efx, rule->match.encap); rule->fw_id = MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL; } static const char *efx_tc_encap_type_name(enum efx_encap_type typ) { switch (typ) { case EFX_ENCAP_TYPE_NONE: return "none"; case EFX_ENCAP_TYPE_VXLAN: return "vxlan"; case EFX_ENCAP_TYPE_GENEVE: return "geneve"; default: pr_warn_once("Unknown efx_encap_type %d encountered\n", typ); return "unknown"; } } /* For details of action order constraints refer to SF-123102-TC-1§12.6.1 */ enum efx_tc_action_order { EFX_TC_AO_DECAP, EFX_TC_AO_VLAN_POP, EFX_TC_AO_VLAN_PUSH, EFX_TC_AO_COUNT, EFX_TC_AO_ENCAP, EFX_TC_AO_DELIVER }; /* Determine whether we can add @new action without violating order */ static bool efx_tc_flower_action_order_ok(const struct efx_tc_action_set *act, enum efx_tc_action_order new) { switch (new) { case EFX_TC_AO_DECAP: if (act->decap) return false; fallthrough; case EFX_TC_AO_VLAN_POP: if (act->vlan_pop >= 2) return false; /* If we've already pushed a VLAN, we can't then pop it; * the hardware would instead try to pop an existing VLAN * before pushing the new one. */ if (act->vlan_push) return false; fallthrough; case EFX_TC_AO_VLAN_PUSH: if (act->vlan_push >= 2) return false; fallthrough; case EFX_TC_AO_COUNT: if (act->count) return false; fallthrough; case EFX_TC_AO_ENCAP: if (act->encap_md) return false; fallthrough; case EFX_TC_AO_DELIVER: return !act->deliver; default: /* Bad caller. Whatever they wanted to do, say they can't. */ WARN_ON_ONCE(1); return false; } } static int efx_tc_flower_replace_foreign(struct efx_nic *efx, struct net_device *net_dev, struct flow_cls_offload *tc) { struct flow_rule *fr = flow_cls_offload_flow_rule(tc); struct netlink_ext_ack *extack = tc->common.extack; struct efx_tc_flow_rule *rule = NULL, *old = NULL; struct efx_tc_action_set *act = NULL; bool found = false, uplinked = false; const struct flow_action_entry *fa; struct efx_tc_match match; struct efx_rep *to_efv; s64 rc; int i; /* Parse match */ memset(&match, 0, sizeof(match)); rc = efx_tc_flower_parse_match(efx, fr, &match, NULL); if (rc) return rc; /* The rule as given to us doesn't specify a source netdevice. * But, determining whether packets from a VF should match it is * complicated, so leave those to the software slowpath: qualify * the filter with source m-port == wire. */ rc = efx_tc_flower_external_mport(efx, EFX_EFV_PF); if (rc < 0) { NL_SET_ERR_MSG_MOD(extack, "Failed to identify ingress m-port for foreign filter"); return rc; } match.value.ingress_port = rc; match.mask.ingress_port = ~0; if (tc->common.chain_index) { NL_SET_ERR_MSG_MOD(extack, "No support for nonzero chain_index"); return -EOPNOTSUPP; } match.mask.recirc_id = 0xff; flow_action_for_each(i, fa, &fr->action) { switch (fa->id) { case FLOW_ACTION_REDIRECT: case FLOW_ACTION_MIRRED: /* mirred means mirror here */ to_efv = efx_tc_flower_lookup_efv(efx, fa->dev); if (IS_ERR(to_efv)) continue; found = true; break; default: break; } } if (!found) { /* We don't care. */ netif_dbg(efx, drv, efx->net_dev, "Ignoring foreign filter that doesn't egdev us\n"); return -EOPNOTSUPP; } rc = efx_mae_match_check_caps(efx, &match.mask, NULL); if (rc) return rc; if (efx_tc_match_is_encap(&match.mask)) { enum efx_encap_type type; type = efx_tc_indr_netdev_type(net_dev); if (type == EFX_ENCAP_TYPE_NONE) { NL_SET_ERR_MSG_MOD(extack, "Egress encap match on unsupported tunnel device"); return -EOPNOTSUPP; } rc = efx_mae_check_encap_type_supported(efx, type); if (rc) { NL_SET_ERR_MSG_FMT_MOD(extack, "Firmware reports no support for %s encap match", efx_tc_encap_type_name(type)); return rc; } rc = efx_tc_flower_record_encap_match(efx, &match, type, EFX_TC_EM_DIRECT, 0, 0, extack); if (rc) return rc; } else { /* This is not a tunnel decap rule, ignore it */ netif_dbg(efx, drv, efx->net_dev, "Ignoring foreign filter without encap match\n"); return -EOPNOTSUPP; } rule = kzalloc(sizeof(*rule), GFP_USER); if (!rule) { rc = -ENOMEM; goto out_free; } INIT_LIST_HEAD(&rule->acts.list); rule->cookie = tc->cookie; old = rhashtable_lookup_get_insert_fast(&efx->tc->match_action_ht, &rule->linkage, efx_tc_match_action_ht_params); if (old) { netif_dbg(efx, drv, efx->net_dev, "Ignoring already-offloaded rule (cookie %lx)\n", tc->cookie); rc = -EEXIST; goto out_free; } act = kzalloc(sizeof(*act), GFP_USER); if (!act) { rc = -ENOMEM; goto release; } /* Parse actions. For foreign rules we only support decap & redirect. * See corresponding code in efx_tc_flower_replace() for theory of * operation & how 'act' cursor is used. */ flow_action_for_each(i, fa, &fr->action) { struct efx_tc_action_set save; switch (fa->id) { case FLOW_ACTION_REDIRECT: case FLOW_ACTION_MIRRED: /* See corresponding code in efx_tc_flower_replace() for * long explanations of what's going on here. */ save = *act; if (fa->hw_stats) { struct efx_tc_counter_index *ctr; if (!(fa->hw_stats & FLOW_ACTION_HW_STATS_DELAYED)) { NL_SET_ERR_MSG_FMT_MOD(extack, "hw_stats_type %u not supported (only 'delayed')", fa->hw_stats); rc = -EOPNOTSUPP; goto release; } if (!efx_tc_flower_action_order_ok(act, EFX_TC_AO_COUNT)) { rc = -EOPNOTSUPP; goto release; } ctr = efx_tc_flower_get_counter_index(efx, tc->cookie, EFX_TC_COUNTER_TYPE_AR); if (IS_ERR(ctr)) { rc = PTR_ERR(ctr); NL_SET_ERR_MSG_MOD(extack, "Failed to obtain a counter"); goto release; } act->count = ctr; INIT_LIST_HEAD(&act->count_user); } if (!efx_tc_flower_action_order_ok(act, EFX_TC_AO_DELIVER)) { /* can't happen */ rc = -EOPNOTSUPP; NL_SET_ERR_MSG_MOD(extack, "Deliver action violates action order (can't happen)"); goto release; } to_efv = efx_tc_flower_lookup_efv(efx, fa->dev); /* PF implies egdev is us, in which case we really * want to deliver to the uplink (because this is an * ingress filter). If we don't recognise the egdev * at all, then we'd better trap so SW can handle it. */ if (IS_ERR(to_efv)) to_efv = EFX_EFV_PF; if (to_efv == EFX_EFV_PF) { if (uplinked) break; uplinked = true; } rc = efx_tc_flower_internal_mport(efx, to_efv); if (rc < 0) { NL_SET_ERR_MSG_MOD(extack, "Failed to identify egress m-port"); goto release; } act->dest_mport = rc; act->deliver = 1; rc = efx_mae_alloc_action_set(efx, act); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to write action set to hw (mirred)"); goto release; } list_add_tail(&act->list, &rule->acts.list); act = NULL; if (fa->id == FLOW_ACTION_REDIRECT) break; /* end of the line */ /* Mirror, so continue on with saved act */ act = kzalloc(sizeof(*act), GFP_USER); if (!act) { rc = -ENOMEM; goto release; } *act = save; break; case FLOW_ACTION_TUNNEL_DECAP: if (!efx_tc_flower_action_order_ok(act, EFX_TC_AO_DECAP)) { rc = -EINVAL; NL_SET_ERR_MSG_MOD(extack, "Decap action violates action order"); goto release; } act->decap = 1; /* If we previously delivered/trapped to uplink, now * that we've decapped we'll want another copy if we * try to deliver/trap to uplink again. */ uplinked = false; break; default: NL_SET_ERR_MSG_FMT_MOD(extack, "Unhandled action %u", fa->id); rc = -EOPNOTSUPP; goto release; } } if (act) { if (!uplinked) { /* Not shot/redirected, so deliver to default dest (which is * the uplink, as this is an ingress filter) */ efx_mae_mport_uplink(efx, &act->dest_mport); act->deliver = 1; } rc = efx_mae_alloc_action_set(efx, act); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to write action set to hw (deliver)"); goto release; } list_add_tail(&act->list, &rule->acts.list); act = NULL; /* Prevent double-free in error path */ } rule->match = match; netif_dbg(efx, drv, efx->net_dev, "Successfully parsed foreign filter (cookie %lx)\n", tc->cookie); rc = efx_mae_alloc_action_set_list(efx, &rule->acts); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to write action set list to hw"); goto release; } rc = efx_mae_insert_rule(efx, &rule->match, EFX_TC_PRIO_TC, rule->acts.fw_id, &rule->fw_id); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to insert rule in hw"); goto release_acts; } return 0; release_acts: efx_mae_free_action_set_list(efx, &rule->acts); release: /* We failed to insert the rule, so free up any entries we created in * subsidiary tables. */ if (act) efx_tc_free_action_set(efx, act, false); if (rule) { rhashtable_remove_fast(&efx->tc->match_action_ht, &rule->linkage, efx_tc_match_action_ht_params); efx_tc_free_action_set_list(efx, &rule->acts, false); } out_free: kfree(rule); if (match.encap) efx_tc_flower_release_encap_match(efx, match.encap); return rc; } static int efx_tc_flower_replace(struct efx_nic *efx, struct net_device *net_dev, struct flow_cls_offload *tc, struct efx_rep *efv) { struct flow_rule *fr = flow_cls_offload_flow_rule(tc); struct netlink_ext_ack *extack = tc->common.extack; const struct ip_tunnel_info *encap_info = NULL; struct efx_tc_flow_rule *rule = NULL, *old; struct efx_tc_action_set *act = NULL; const struct flow_action_entry *fa; struct efx_rep *from_efv, *to_efv; struct efx_tc_match match; u32 acts_id; s64 rc; int i; if (!tc_can_offload_extack(efx->net_dev, extack)) return -EOPNOTSUPP; if (WARN_ON(!efx->tc)) return -ENETDOWN; if (WARN_ON(!efx->tc->up)) return -ENETDOWN; from_efv = efx_tc_flower_lookup_efv(efx, net_dev); if (IS_ERR(from_efv)) { /* Not from our PF or representors, so probably a tunnel dev */ return efx_tc_flower_replace_foreign(efx, net_dev, tc); } if (efv != from_efv) { /* can't happen */ NL_SET_ERR_MSG_FMT_MOD(extack, "for %s efv is %snull but from_efv is %snull (can't happen)", netdev_name(net_dev), efv ? "non-" : "", from_efv ? "non-" : ""); return -EINVAL; } /* Parse match */ memset(&match, 0, sizeof(match)); rc = efx_tc_flower_external_mport(efx, from_efv); if (rc < 0) { NL_SET_ERR_MSG_MOD(extack, "Failed to identify ingress m-port"); return rc; } match.value.ingress_port = rc; match.mask.ingress_port = ~0; rc = efx_tc_flower_parse_match(efx, fr, &match, extack); if (rc) return rc; if (efx_tc_match_is_encap(&match.mask)) { NL_SET_ERR_MSG_MOD(extack, "Ingress enc_key matches not supported"); return -EOPNOTSUPP; } if (tc->common.chain_index) { NL_SET_ERR_MSG_MOD(extack, "No support for nonzero chain_index"); return -EOPNOTSUPP; } match.mask.recirc_id = 0xff; rc = efx_mae_match_check_caps(efx, &match.mask, extack); if (rc) return rc; rule = kzalloc(sizeof(*rule), GFP_USER); if (!rule) return -ENOMEM; INIT_LIST_HEAD(&rule->acts.list); rule->cookie = tc->cookie; old = rhashtable_lookup_get_insert_fast(&efx->tc->match_action_ht, &rule->linkage, efx_tc_match_action_ht_params); if (old) { netif_dbg(efx, drv, efx->net_dev, "Already offloaded rule (cookie %lx)\n", tc->cookie); NL_SET_ERR_MSG_MOD(extack, "Rule already offloaded"); kfree(rule); return -EEXIST; } /* Parse actions */ act = kzalloc(sizeof(*act), GFP_USER); if (!act) { rc = -ENOMEM; goto release; } /** * DOC: TC action translation * * Actions in TC are sequential and cumulative, with delivery actions * potentially anywhere in the order. The EF100 MAE, however, takes * an 'action set list' consisting of 'action sets', each of which is * applied to the _original_ packet, and consists of a set of optional * actions in a fixed order with delivery at the end. * To translate between these two models, we maintain a 'cursor', @act, * which describes the cumulative effect of all the packet-mutating * actions encountered so far; on handling a delivery (mirred or drop) * action, once the action-set has been inserted into hardware, we * append @act to the action-set list (@rule->acts); if this is a pipe * action (mirred mirror) we then allocate a new @act with a copy of * the cursor state _before_ the delivery action, otherwise we set @act * to %NULL. * This ensures that every allocated action-set is either attached to * @rule->acts or pointed to by @act (and never both), and that only * those action-sets in @rule->acts exist in hardware. Consequently, * in the failure path, @act only needs to be freed in memory, whereas * for @rule->acts we remove each action-set from hardware before * freeing it (efx_tc_free_action_set_list()), even if the action-set * list itself is not in hardware. */ flow_action_for_each(i, fa, &fr->action) { struct efx_tc_action_set save; u16 tci; if (!act) { /* more actions after a non-pipe action */ NL_SET_ERR_MSG_MOD(extack, "Action follows non-pipe action"); rc = -EINVAL; goto release; } if ((fa->id == FLOW_ACTION_REDIRECT || fa->id == FLOW_ACTION_MIRRED || fa->id == FLOW_ACTION_DROP) && fa->hw_stats) { struct efx_tc_counter_index *ctr; /* Currently the only actions that want stats are * mirred and gact (ok, shot, trap, goto-chain), which * means we want stats just before delivery. Also, * note that tunnel_key set shouldn't change the length * — it's only the subsequent mirred that does that, * and the stats are taken _before_ the mirred action * happens. */ if (!efx_tc_flower_action_order_ok(act, EFX_TC_AO_COUNT)) { /* All supported actions that count either steal * (gact shot, mirred redirect) or clone act * (mirred mirror), so we should never get two * count actions on one action_set. */ NL_SET_ERR_MSG_MOD(extack, "Count-action conflict (can't happen)"); rc = -EOPNOTSUPP; goto release; } if (!(fa->hw_stats & FLOW_ACTION_HW_STATS_DELAYED)) { NL_SET_ERR_MSG_FMT_MOD(extack, "hw_stats_type %u not supported (only 'delayed')", fa->hw_stats); rc = -EOPNOTSUPP; goto release; } ctr = efx_tc_flower_get_counter_index(efx, tc->cookie, EFX_TC_COUNTER_TYPE_AR); if (IS_ERR(ctr)) { rc = PTR_ERR(ctr); NL_SET_ERR_MSG_MOD(extack, "Failed to obtain a counter"); goto release; } act->count = ctr; INIT_LIST_HEAD(&act->count_user); } switch (fa->id) { case FLOW_ACTION_DROP: rc = efx_mae_alloc_action_set(efx, act); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to write action set to hw (drop)"); goto release; } list_add_tail(&act->list, &rule->acts.list); act = NULL; /* end of the line */ break; case FLOW_ACTION_REDIRECT: case FLOW_ACTION_MIRRED: save = *act; if (encap_info) { struct efx_tc_encap_action *encap; if (!efx_tc_flower_action_order_ok(act, EFX_TC_AO_ENCAP)) { rc = -EOPNOTSUPP; NL_SET_ERR_MSG_MOD(extack, "Encap action violates action order"); goto release; } encap = efx_tc_flower_create_encap_md( efx, encap_info, fa->dev, extack); if (IS_ERR_OR_NULL(encap)) { rc = PTR_ERR(encap); if (!rc) rc = -EIO; /* arbitrary */ goto release; } act->encap_md = encap; list_add_tail(&act->encap_user, &encap->users); act->dest_mport = encap->dest_mport; act->deliver = 1; if (act->count && !WARN_ON(!act->count->cnt)) { /* This counter is used by an encap * action, which needs a reference back * so it can prod neighbouring whenever * traffic is seen. */ spin_lock_bh(&act->count->cnt->lock); list_add_tail(&act->count_user, &act->count->cnt->users); spin_unlock_bh(&act->count->cnt->lock); } rc = efx_mae_alloc_action_set(efx, act); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to write action set to hw (encap)"); goto release; } list_add_tail(&act->list, &rule->acts.list); act->user = &rule->acts; act = NULL; if (fa->id == FLOW_ACTION_REDIRECT) break; /* end of the line */ /* Mirror, so continue on with saved act */ save.count = NULL; act = kzalloc(sizeof(*act), GFP_USER); if (!act) { rc = -ENOMEM; goto release; } *act = save; break; } if (!efx_tc_flower_action_order_ok(act, EFX_TC_AO_DELIVER)) { /* can't happen */ rc = -EOPNOTSUPP; NL_SET_ERR_MSG_MOD(extack, "Deliver action violates action order (can't happen)"); goto release; } to_efv = efx_tc_flower_lookup_efv(efx, fa->dev); if (IS_ERR(to_efv)) { NL_SET_ERR_MSG_MOD(extack, "Mirred egress device not on switch"); rc = PTR_ERR(to_efv); goto release; } rc = efx_tc_flower_external_mport(efx, to_efv); if (rc < 0) { NL_SET_ERR_MSG_MOD(extack, "Failed to identify egress m-port"); goto release; } act->dest_mport = rc; act->deliver = 1; rc = efx_mae_alloc_action_set(efx, act); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to write action set to hw (mirred)"); goto release; } list_add_tail(&act->list, &rule->acts.list); act = NULL; if (fa->id == FLOW_ACTION_REDIRECT) break; /* end of the line */ /* Mirror, so continue on with saved act */ save.count = NULL; act = kzalloc(sizeof(*act), GFP_USER); if (!act) { rc = -ENOMEM; goto release; } *act = save; break; case FLOW_ACTION_VLAN_POP: if (act->vlan_push) { act->vlan_push--; } else if (efx_tc_flower_action_order_ok(act, EFX_TC_AO_VLAN_POP)) { act->vlan_pop++; } else { NL_SET_ERR_MSG_MOD(extack, "More than two VLAN pops, or action order violated"); rc = -EINVAL; goto release; } break; case FLOW_ACTION_VLAN_PUSH: if (!efx_tc_flower_action_order_ok(act, EFX_TC_AO_VLAN_PUSH)) { rc = -EINVAL; NL_SET_ERR_MSG_MOD(extack, "More than two VLAN pushes, or action order violated"); goto release; } tci = fa->vlan.vid & VLAN_VID_MASK; tci |= fa->vlan.prio << VLAN_PRIO_SHIFT; act->vlan_tci[act->vlan_push] = cpu_to_be16(tci); act->vlan_proto[act->vlan_push] = fa->vlan.proto; act->vlan_push++; break; case FLOW_ACTION_TUNNEL_ENCAP: if (encap_info) { /* Can't specify encap multiple times. * If you want to overwrite an existing * encap_info, use an intervening * FLOW_ACTION_TUNNEL_DECAP to clear it. */ NL_SET_ERR_MSG_MOD(extack, "Tunnel key set when already set"); rc = -EINVAL; goto release; } if (!fa->tunnel) { NL_SET_ERR_MSG_MOD(extack, "Tunnel key set is missing key"); rc = -EOPNOTSUPP; goto release; } encap_info = fa->tunnel; break; case FLOW_ACTION_TUNNEL_DECAP: if (encap_info) { encap_info = NULL; break; } /* Since we don't support enc_key matches on ingress * (and if we did there'd be no tunnel-device to give * us a type), we can't offload a decap that's not * just undoing a previous encap action. */ NL_SET_ERR_MSG_MOD(extack, "Cannot offload tunnel decap action without tunnel device"); rc = -EOPNOTSUPP; goto release; default: NL_SET_ERR_MSG_FMT_MOD(extack, "Unhandled action %u", fa->id); rc = -EOPNOTSUPP; goto release; } } if (act) { /* Not shot/redirected, so deliver to default dest */ if (from_efv == EFX_EFV_PF) /* Rule applies to traffic from the wire, * and default dest is thus the PF */ efx_mae_mport_uplink(efx, &act->dest_mport); else /* Representor, so rule applies to traffic from * representee, and default dest is thus the rep. * All reps use the same mport for delivery */ efx_mae_mport_mport(efx, efx->tc->reps_mport_id, &act->dest_mport); act->deliver = 1; rc = efx_mae_alloc_action_set(efx, act); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to write action set to hw (deliver)"); goto release; } list_add_tail(&act->list, &rule->acts.list); act = NULL; /* Prevent double-free in error path */ } netif_dbg(efx, drv, efx->net_dev, "Successfully parsed filter (cookie %lx)\n", tc->cookie); rule->match = match; rc = efx_mae_alloc_action_set_list(efx, &rule->acts); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to write action set list to hw"); goto release; } if (from_efv == EFX_EFV_PF) /* PF netdev, so rule applies to traffic from wire */ rule->fallback = &efx->tc->facts.pf; else /* repdev, so rule applies to traffic from representee */ rule->fallback = &efx->tc->facts.reps; if (!efx_tc_check_ready(efx, rule)) { netif_dbg(efx, drv, efx->net_dev, "action not ready for hw\n"); acts_id = rule->fallback->fw_id; } else { netif_dbg(efx, drv, efx->net_dev, "ready for hw\n"); acts_id = rule->acts.fw_id; } rc = efx_mae_insert_rule(efx, &rule->match, EFX_TC_PRIO_TC, acts_id, &rule->fw_id); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to insert rule in hw"); goto release_acts; } return 0; release_acts: efx_mae_free_action_set_list(efx, &rule->acts); release: /* We failed to insert the rule, so free up any entries we created in * subsidiary tables. */ if (act) efx_tc_free_action_set(efx, act, false); if (rule) { rhashtable_remove_fast(&efx->tc->match_action_ht, &rule->linkage, efx_tc_match_action_ht_params); efx_tc_free_action_set_list(efx, &rule->acts, false); } kfree(rule); return rc; } static int efx_tc_flower_destroy(struct efx_nic *efx, struct net_device *net_dev, struct flow_cls_offload *tc) { struct netlink_ext_ack *extack = tc->common.extack; struct efx_tc_flow_rule *rule; rule = rhashtable_lookup_fast(&efx->tc->match_action_ht, &tc->cookie, efx_tc_match_action_ht_params); if (!rule) { /* Only log a message if we're the ingress device. Otherwise * it's a foreign filter and we might just not have been * interested (e.g. we might not have been the egress device * either). */ if (!IS_ERR(efx_tc_flower_lookup_efv(efx, net_dev))) netif_warn(efx, drv, efx->net_dev, "Filter %lx not found to remove\n", tc->cookie); NL_SET_ERR_MSG_MOD(extack, "Flow cookie not found in offloaded rules"); return -ENOENT; } /* Remove it from HW */ efx_tc_delete_rule(efx, rule); /* Delete it from SW */ rhashtable_remove_fast(&efx->tc->match_action_ht, &rule->linkage, efx_tc_match_action_ht_params); netif_dbg(efx, drv, efx->net_dev, "Removed filter %lx\n", rule->cookie); kfree(rule); return 0; } static int efx_tc_flower_stats(struct efx_nic *efx, struct net_device *net_dev, struct flow_cls_offload *tc) { struct netlink_ext_ack *extack = tc->common.extack; struct efx_tc_counter_index *ctr; struct efx_tc_counter *cnt; u64 packets, bytes; ctr = efx_tc_flower_find_counter_index(efx, tc->cookie); if (!ctr) { /* See comment in efx_tc_flower_destroy() */ if (!IS_ERR(efx_tc_flower_lookup_efv(efx, net_dev))) if (net_ratelimit()) netif_warn(efx, drv, efx->net_dev, "Filter %lx not found for stats\n", tc->cookie); NL_SET_ERR_MSG_MOD(extack, "Flow cookie not found in offloaded rules"); return -ENOENT; } if (WARN_ON(!ctr->cnt)) /* can't happen */ return -EIO; cnt = ctr->cnt; spin_lock_bh(&cnt->lock); /* Report only new pkts/bytes since last time TC asked */ packets = cnt->packets; bytes = cnt->bytes; flow_stats_update(&tc->stats, bytes - cnt->old_bytes, packets - cnt->old_packets, 0, cnt->touched, FLOW_ACTION_HW_STATS_DELAYED); cnt->old_packets = packets; cnt->old_bytes = bytes; spin_unlock_bh(&cnt->lock); return 0; } int efx_tc_flower(struct efx_nic *efx, struct net_device *net_dev, struct flow_cls_offload *tc, struct efx_rep *efv) { int rc; if (!efx->tc) return -EOPNOTSUPP; mutex_lock(&efx->tc->mutex); switch (tc->command) { case FLOW_CLS_REPLACE: rc = efx_tc_flower_replace(efx, net_dev, tc, efv); break; case FLOW_CLS_DESTROY: rc = efx_tc_flower_destroy(efx, net_dev, tc); break; case FLOW_CLS_STATS: rc = efx_tc_flower_stats(efx, net_dev, tc); break; default: rc = -EOPNOTSUPP; break; } mutex_unlock(&efx->tc->mutex); return rc; } static int efx_tc_configure_default_rule(struct efx_nic *efx, u32 ing_port, u32 eg_port, struct efx_tc_flow_rule *rule) { struct efx_tc_action_set_list *acts = &rule->acts; struct efx_tc_match *match = &rule->match; struct efx_tc_action_set *act; int rc; match->value.ingress_port = ing_port; match->mask.ingress_port = ~0; act = kzalloc(sizeof(*act), GFP_KERNEL); if (!act) return -ENOMEM; act->deliver = 1; act->dest_mport = eg_port; rc = efx_mae_alloc_action_set(efx, act); if (rc) goto fail1; EFX_WARN_ON_PARANOID(!list_empty(&acts->list)); list_add_tail(&act->list, &acts->list); rc = efx_mae_alloc_action_set_list(efx, acts); if (rc) goto fail2; rc = efx_mae_insert_rule(efx, match, EFX_TC_PRIO_DFLT, acts->fw_id, &rule->fw_id); if (rc) goto fail3; return 0; fail3: efx_mae_free_action_set_list(efx, acts); fail2: list_del(&act->list); efx_mae_free_action_set(efx, act->fw_id); fail1: kfree(act); return rc; } static int efx_tc_configure_default_rule_pf(struct efx_nic *efx) { struct efx_tc_flow_rule *rule = &efx->tc->dflt.pf; u32 ing_port, eg_port; efx_mae_mport_uplink(efx, &ing_port); efx_mae_mport_wire(efx, &eg_port); return efx_tc_configure_default_rule(efx, ing_port, eg_port, rule); } static int efx_tc_configure_default_rule_wire(struct efx_nic *efx) { struct efx_tc_flow_rule *rule = &efx->tc->dflt.wire; u32 ing_port, eg_port; efx_mae_mport_wire(efx, &ing_port); efx_mae_mport_uplink(efx, &eg_port); return efx_tc_configure_default_rule(efx, ing_port, eg_port, rule); } int efx_tc_configure_default_rule_rep(struct efx_rep *efv) { struct efx_tc_flow_rule *rule = &efv->dflt; struct efx_nic *efx = efv->parent; u32 ing_port, eg_port; efx_mae_mport_mport(efx, efv->mport, &ing_port); efx_mae_mport_mport(efx, efx->tc->reps_mport_id, &eg_port); return efx_tc_configure_default_rule(efx, ing_port, eg_port, rule); } void efx_tc_deconfigure_default_rule(struct efx_nic *efx, struct efx_tc_flow_rule *rule) { if (rule->fw_id != MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL) efx_tc_delete_rule(efx, rule); rule->fw_id = MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL; } static int efx_tc_configure_fallback_acts(struct efx_nic *efx, u32 eg_port, struct efx_tc_action_set_list *acts) { struct efx_tc_action_set *act; int rc; act = kzalloc(sizeof(*act), GFP_KERNEL); if (!act) return -ENOMEM; act->deliver = 1; act->dest_mport = eg_port; rc = efx_mae_alloc_action_set(efx, act); if (rc) goto fail1; EFX_WARN_ON_PARANOID(!list_empty(&acts->list)); list_add_tail(&act->list, &acts->list); rc = efx_mae_alloc_action_set_list(efx, acts); if (rc) goto fail2; return 0; fail2: list_del(&act->list); efx_mae_free_action_set(efx, act->fw_id); fail1: kfree(act); return rc; } static int efx_tc_configure_fallback_acts_pf(struct efx_nic *efx) { struct efx_tc_action_set_list *acts = &efx->tc->facts.pf; u32 eg_port; efx_mae_mport_uplink(efx, &eg_port); return efx_tc_configure_fallback_acts(efx, eg_port, acts); } static int efx_tc_configure_fallback_acts_reps(struct efx_nic *efx) { struct efx_tc_action_set_list *acts = &efx->tc->facts.reps; u32 eg_port; efx_mae_mport_mport(efx, efx->tc->reps_mport_id, &eg_port); return efx_tc_configure_fallback_acts(efx, eg_port, acts); } static void efx_tc_deconfigure_fallback_acts(struct efx_nic *efx, struct efx_tc_action_set_list *acts) { efx_tc_free_action_set_list(efx, acts, true); } static int efx_tc_configure_rep_mport(struct efx_nic *efx) { u32 rep_mport_label; int rc; rc = efx_mae_allocate_mport(efx, &efx->tc->reps_mport_id, &rep_mport_label); if (rc) return rc; pci_dbg(efx->pci_dev, "created rep mport 0x%08x (0x%04x)\n", efx->tc->reps_mport_id, rep_mport_label); /* Use mport *selector* as vport ID */ efx_mae_mport_mport(efx, efx->tc->reps_mport_id, &efx->tc->reps_mport_vport_id); return 0; } static void efx_tc_deconfigure_rep_mport(struct efx_nic *efx) { efx_mae_free_mport(efx, efx->tc->reps_mport_id); efx->tc->reps_mport_id = MAE_MPORT_SELECTOR_NULL; } int efx_tc_insert_rep_filters(struct efx_nic *efx) { struct efx_filter_spec promisc, allmulti; int rc; if (efx->type->is_vf) return 0; if (!efx->tc) return 0; efx_filter_init_rx(&promisc, EFX_FILTER_PRI_REQUIRED, 0, 0); efx_filter_set_uc_def(&promisc); efx_filter_set_vport_id(&promisc, efx->tc->reps_mport_vport_id); rc = efx_filter_insert_filter(efx, &promisc, false); if (rc < 0) return rc; efx->tc->reps_filter_uc = rc; efx_filter_init_rx(&allmulti, EFX_FILTER_PRI_REQUIRED, 0, 0); efx_filter_set_mc_def(&allmulti); efx_filter_set_vport_id(&allmulti, efx->tc->reps_mport_vport_id); rc = efx_filter_insert_filter(efx, &allmulti, false); if (rc < 0) return rc; efx->tc->reps_filter_mc = rc; return 0; } void efx_tc_remove_rep_filters(struct efx_nic *efx) { if (efx->type->is_vf) return; if (!efx->tc) return; if (efx->tc->reps_filter_mc >= 0) efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED, efx->tc->reps_filter_mc); efx->tc->reps_filter_mc = -1; if (efx->tc->reps_filter_uc >= 0) efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED, efx->tc->reps_filter_uc); efx->tc->reps_filter_uc = -1; } int efx_init_tc(struct efx_nic *efx) { int rc; rc = efx_mae_get_caps(efx, efx->tc->caps); if (rc) return rc; if (efx->tc->caps->match_field_count > MAE_NUM_FIELDS) /* Firmware supports some match fields the driver doesn't know * about. Not fatal, unless any of those fields are required * (MAE_FIELD_SUPPORTED_MATCH_ALWAYS) but if so we don't know. */ netif_warn(efx, probe, efx->net_dev, "FW reports additional match fields %u\n", efx->tc->caps->match_field_count); if (efx->tc->caps->action_prios < EFX_TC_PRIO__NUM) { netif_err(efx, probe, efx->net_dev, "Too few action prios supported (have %u, need %u)\n", efx->tc->caps->action_prios, EFX_TC_PRIO__NUM); return -EIO; } rc = efx_tc_configure_default_rule_pf(efx); if (rc) return rc; rc = efx_tc_configure_default_rule_wire(efx); if (rc) return rc; rc = efx_tc_configure_rep_mport(efx); if (rc) return rc; rc = efx_tc_configure_fallback_acts_pf(efx); if (rc) return rc; rc = efx_tc_configure_fallback_acts_reps(efx); if (rc) return rc; rc = flow_indr_dev_register(efx_tc_indr_setup_cb, efx); if (rc) return rc; efx->tc->up = true; return 0; } void efx_fini_tc(struct efx_nic *efx) { /* We can get called even if efx_init_struct_tc() failed */ if (!efx->tc) return; if (efx->tc->up) flow_indr_dev_unregister(efx_tc_indr_setup_cb, efx, efx_tc_block_unbind); efx_tc_deconfigure_rep_mport(efx); efx_tc_deconfigure_default_rule(efx, &efx->tc->dflt.pf); efx_tc_deconfigure_default_rule(efx, &efx->tc->dflt.wire); efx_tc_deconfigure_fallback_acts(efx, &efx->tc->facts.pf); efx_tc_deconfigure_fallback_acts(efx, &efx->tc->facts.reps); efx->tc->up = false; } /* At teardown time, all TC filter rules (and thus all resources they created) * should already have been removed. If we find any in our hashtables, make a * cursory attempt to clean up the software side. */ static void efx_tc_encap_match_free(void *ptr, void *__unused) { struct efx_tc_encap_match *encap = ptr; WARN_ON(refcount_read(&encap->ref)); kfree(encap); } static void efx_tc_flow_free(void *ptr, void *arg) { struct efx_tc_flow_rule *rule = ptr; struct efx_nic *efx = arg; netif_err(efx, drv, efx->net_dev, "tc rule %lx still present at teardown, removing\n", rule->cookie); /* Also releases entries in subsidiary tables */ efx_tc_delete_rule(efx, rule); kfree(rule); } int efx_init_struct_tc(struct efx_nic *efx) { int rc; if (efx->type->is_vf) return 0; efx->tc = kzalloc(sizeof(*efx->tc), GFP_KERNEL); if (!efx->tc) return -ENOMEM; efx->tc->caps = kzalloc(sizeof(struct mae_caps), GFP_KERNEL); if (!efx->tc->caps) { rc = -ENOMEM; goto fail_alloc_caps; } INIT_LIST_HEAD(&efx->tc->block_list); mutex_init(&efx->tc->mutex); init_waitqueue_head(&efx->tc->flush_wq); rc = efx_tc_init_encap_actions(efx); if (rc < 0) goto fail_encap_actions; rc = efx_tc_init_counters(efx); if (rc < 0) goto fail_counters; rc = rhashtable_init(&efx->tc->encap_match_ht, &efx_tc_encap_match_ht_params); if (rc < 0) goto fail_encap_match_ht; rc = rhashtable_init(&efx->tc->match_action_ht, &efx_tc_match_action_ht_params); if (rc < 0) goto fail_match_action_ht; efx->tc->reps_filter_uc = -1; efx->tc->reps_filter_mc = -1; INIT_LIST_HEAD(&efx->tc->dflt.pf.acts.list); efx->tc->dflt.pf.fw_id = MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL; INIT_LIST_HEAD(&efx->tc->dflt.wire.acts.list); efx->tc->dflt.wire.fw_id = MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL; INIT_LIST_HEAD(&efx->tc->facts.pf.list); efx->tc->facts.pf.fw_id = MC_CMD_MAE_ACTION_SET_ALLOC_OUT_ACTION_SET_ID_NULL; INIT_LIST_HEAD(&efx->tc->facts.reps.list); efx->tc->facts.reps.fw_id = MC_CMD_MAE_ACTION_SET_ALLOC_OUT_ACTION_SET_ID_NULL; efx->extra_channel_type[EFX_EXTRA_CHANNEL_TC] = &efx_tc_channel_type; return 0; fail_match_action_ht: rhashtable_destroy(&efx->tc->encap_match_ht); fail_encap_match_ht: efx_tc_destroy_counters(efx); fail_counters: efx_tc_destroy_encap_actions(efx); fail_encap_actions: mutex_destroy(&efx->tc->mutex); kfree(efx->tc->caps); fail_alloc_caps: kfree(efx->tc); efx->tc = NULL; return rc; } void efx_fini_struct_tc(struct efx_nic *efx) { if (!efx->tc) return; mutex_lock(&efx->tc->mutex); EFX_WARN_ON_PARANOID(efx->tc->dflt.pf.fw_id != MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL); EFX_WARN_ON_PARANOID(efx->tc->dflt.wire.fw_id != MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL); EFX_WARN_ON_PARANOID(efx->tc->facts.pf.fw_id != MC_CMD_MAE_ACTION_SET_LIST_ALLOC_OUT_ACTION_SET_LIST_ID_NULL); EFX_WARN_ON_PARANOID(efx->tc->facts.reps.fw_id != MC_CMD_MAE_ACTION_SET_LIST_ALLOC_OUT_ACTION_SET_LIST_ID_NULL); rhashtable_free_and_destroy(&efx->tc->match_action_ht, efx_tc_flow_free, efx); rhashtable_free_and_destroy(&efx->tc->encap_match_ht, efx_tc_encap_match_free, NULL); efx_tc_fini_counters(efx); efx_tc_fini_encap_actions(efx); mutex_unlock(&efx->tc->mutex); mutex_destroy(&efx->tc->mutex); kfree(efx->tc->caps); kfree(efx->tc); efx->tc = NULL; }
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