diff options
Diffstat (limited to 'drivers/net/ethernet/sfc/tc_encap_actions.h')
| -rw-r--r-- | drivers/net/ethernet/sfc/tc_encap_actions.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/tc_encap_actions.h b/drivers/net/ethernet/sfc/tc_encap_actions.h new file mode 100644 index 000000000000..c3c7904ad7ff --- /dev/null +++ b/drivers/net/ethernet/sfc/tc_encap_actions.h @@ -0,0 +1,114 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/**************************************************************************** + * Driver for Solarflare network controllers and boards + * Copyright 2023, Advanced Micro Devices, 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_ENCAP_ACTIONS_H +#define EFX_TC_ENCAP_ACTIONS_H +#include "net_driver.h" + +#if IS_ENABLED(CONFIG_SFC_SRIOV) +#include <linux/refcount.h> +#include <net/tc_act/tc_tunnel_key.h> + +/** + * struct efx_neigh_binder - driver state for a neighbour entry + * @net: the network namespace in which this neigh resides + * @dst_ip: the IPv4 destination address resolved by this neigh + * @dst_ip6: the IPv6 destination address resolved by this neigh + * @ha: the hardware (Ethernet) address of the neighbour + * @n_valid: true if the neighbour is in NUD_VALID state + * @lock: protects @ha and @n_valid + * @ttl: Time To Live associated with the route used + * @dying: set when egdev is going away, to skip further updates + * @egdev: egress device from the route lookup. Holds a reference + * @dev_tracker: reference tracker entry for @egdev + * @ns_tracker: reference tracker entry for @ns + * @ref: counts encap actions referencing this entry + * @used: jiffies of last time traffic hit any encap action using this. + * When counter reads update this, a new neighbour event is sent to + * indicate that the neighbour entry is still in use. + * @users: list of &struct efx_tc_encap_action + * @linkage: entry in efx->neigh_ht (keys are @net, @dst_ip, @dst_ip6). + * @work: processes neighbour state changes, updates the encap actions + * @efx: owning NIC instance. + * + * Associates a neighbour entry with the encap actions that are + * interested in it, allowing the latter to be updated when the + * neighbour details change. + * Whichever of @dst_ip and @dst_ip6 is not in use will be all-zeroes, + * this distinguishes IPv4 from IPv6 entries. + */ +struct efx_neigh_binder { + struct net *net; + __be32 dst_ip; + struct in6_addr dst_ip6; + char ha[ETH_ALEN]; + bool n_valid; + rwlock_t lock; + u8 ttl; + bool dying; + struct net_device *egdev; + netdevice_tracker dev_tracker; + netns_tracker ns_tracker; + refcount_t ref; + unsigned long used; + struct list_head users; + struct rhash_head linkage; + struct work_struct work; + struct efx_nic *efx; +}; + +/* This limit is arbitrary; current hardware (SN1022) handles encap headers + * of up to 126 bytes, but that limit is not enshrined in the MCDI protocol. + */ +#define EFX_TC_MAX_ENCAP_HDR 126 +struct efx_tc_encap_action { + enum efx_encap_type type; + struct ip_tunnel_key key; /* 52 bytes */ + u32 dest_mport; /* is copied into struct efx_tc_action_set */ + u8 encap_hdr_len; + bool n_valid; + u8 encap_hdr[EFX_TC_MAX_ENCAP_HDR]; + struct efx_neigh_binder *neigh; + struct list_head list; /* entry on neigh->users list */ + struct list_head users; /* action sets using this encap_md */ + struct rhash_head linkage; /* efx->tc_encap_ht */ + refcount_t ref; + u32 fw_id; /* index of this entry in firmware encap table */ +}; + +/* create/uncreate/teardown hashtables */ +int efx_tc_init_encap_actions(struct efx_nic *efx); +void efx_tc_destroy_encap_actions(struct efx_nic *efx); +void efx_tc_fini_encap_actions(struct efx_nic *efx); + +struct efx_tc_flow_rule; +bool efx_tc_check_ready(struct efx_nic *efx, struct efx_tc_flow_rule *rule); + +struct efx_tc_encap_action *efx_tc_flower_create_encap_md( + struct efx_nic *efx, const struct ip_tunnel_info *info, + struct net_device *egdev, struct netlink_ext_ack *extack); +void efx_tc_flower_release_encap_md(struct efx_nic *efx, + struct efx_tc_encap_action *encap); + +void efx_tc_unregister_egdev(struct efx_nic *efx, struct net_device *net_dev); +int efx_tc_netevent_event(struct efx_nic *efx, unsigned long event, + void *ptr); + +#else /* CONFIG_SFC_SRIOV */ + +static inline int efx_tc_netevent_event(struct efx_nic *efx, + unsigned long event, void *ptr) +{ + return NOTIFY_DONE; +} + +#endif /* CONFIG_SFC_SRIOV */ + +#endif /* EFX_TC_ENCAP_ACTIONS_H */ |