/* SPDX-License-Identifier: GPL-2.0-only */ /**************************************************************************** * Driver for Solarflare network controllers and boards * Copyright 2005-2013 Solarflare Communications Inc. */ #ifndef EF4_FILTER_H #define EF4_FILTER_H #include <linux/types.h> #include <linux/if_ether.h> #include <asm/byteorder.h> /** * enum ef4_filter_match_flags - Flags for hardware filter match type * @EF4_FILTER_MATCH_REM_HOST: Match by remote IP host address * @EF4_FILTER_MATCH_LOC_HOST: Match by local IP host address * @EF4_FILTER_MATCH_REM_MAC: Match by remote MAC address * @EF4_FILTER_MATCH_REM_PORT: Match by remote TCP/UDP port * @EF4_FILTER_MATCH_LOC_MAC: Match by local MAC address * @EF4_FILTER_MATCH_LOC_PORT: Match by local TCP/UDP port * @EF4_FILTER_MATCH_ETHER_TYPE: Match by Ether-type * @EF4_FILTER_MATCH_INNER_VID: Match by inner VLAN ID * @EF4_FILTER_MATCH_OUTER_VID: Match by outer VLAN ID * @EF4_FILTER_MATCH_IP_PROTO: Match by IP transport protocol * @EF4_FILTER_MATCH_LOC_MAC_IG: Match by local MAC address I/G bit. * Used for RX default unicast and multicast/broadcast filters. * * Only some combinations are supported, depending on NIC type: * * - Falcon supports RX filters matching by {TCP,UDP}/IPv4 4-tuple or * local 2-tuple (only implemented for Falcon B0) * * - Siena supports RX and TX filters matching by {TCP,UDP}/IPv4 4-tuple * or local 2-tuple, or local MAC with or without outer VID, and RX * default filters * * - Huntington supports filter matching controlled by firmware, potentially * using {TCP,UDP}/IPv{4,6} 4-tuple or local 2-tuple, local MAC or I/G bit, * with or without outer and inner VID */ enum ef4_filter_match_flags { … }; /** * enum ef4_filter_priority - priority of a hardware filter specification * @EF4_FILTER_PRI_HINT: Performance hint * @EF4_FILTER_PRI_AUTO: Automatic filter based on device address list * or hardware requirements. This may only be used by the filter * implementation for each NIC type. * @EF4_FILTER_PRI_MANUAL: Manually configured filter * @EF4_FILTER_PRI_REQUIRED: Required for correct behaviour (user-level * networking and SR-IOV) */ enum ef4_filter_priority { … }; /** * enum ef4_filter_flags - flags for hardware filter specifications * @EF4_FILTER_FLAG_RX_RSS: Use RSS to spread across multiple queues. * By default, matching packets will be delivered only to the * specified queue. If this flag is set, they will be delivered * to a range of queues offset from the specified queue number * according to the indirection table. * @EF4_FILTER_FLAG_RX_SCATTER: Enable DMA scatter on the receiving * queue. * @EF4_FILTER_FLAG_RX_OVER_AUTO: Indicates a filter that is * overriding an automatic filter (priority * %EF4_FILTER_PRI_AUTO). This may only be set by the filter * implementation for each type. A removal request will restore * the automatic filter in its place. * @EF4_FILTER_FLAG_RX: Filter is for RX * @EF4_FILTER_FLAG_TX: Filter is for TX */ enum ef4_filter_flags { … }; /** * struct ef4_filter_spec - specification for a hardware filter * @match_flags: Match type flags, from &enum ef4_filter_match_flags * @priority: Priority of the filter, from &enum ef4_filter_priority * @flags: Miscellaneous flags, from &enum ef4_filter_flags * @rss_context: RSS context to use, if %EF4_FILTER_FLAG_RX_RSS is set * @dmaq_id: Source/target queue index, or %EF4_FILTER_RX_DMAQ_ID_DROP for * an RX drop filter * @outer_vid: Outer VLAN ID to match, if %EF4_FILTER_MATCH_OUTER_VID is set * @inner_vid: Inner VLAN ID to match, if %EF4_FILTER_MATCH_INNER_VID is set * @loc_mac: Local MAC address to match, if %EF4_FILTER_MATCH_LOC_MAC or * %EF4_FILTER_MATCH_LOC_MAC_IG is set * @rem_mac: Remote MAC address to match, if %EF4_FILTER_MATCH_REM_MAC is set * @ether_type: Ether-type to match, if %EF4_FILTER_MATCH_ETHER_TYPE is set * @ip_proto: IP transport protocol to match, if %EF4_FILTER_MATCH_IP_PROTO * is set * @loc_host: Local IP host to match, if %EF4_FILTER_MATCH_LOC_HOST is set * @rem_host: Remote IP host to match, if %EF4_FILTER_MATCH_REM_HOST is set * @loc_port: Local TCP/UDP port to match, if %EF4_FILTER_MATCH_LOC_PORT is set * @rem_port: Remote TCP/UDP port to match, if %EF4_FILTER_MATCH_REM_PORT is set * * The ef4_filter_init_rx() or ef4_filter_init_tx() function *must* be * used to initialise the structure. The ef4_filter_set_*() functions * may then be used to set @rss_context, @match_flags and related * fields. * * The @priority field is used by software to determine whether a new * filter may replace an old one. The hardware priority of a filter * depends on which fields are matched. */ struct ef4_filter_spec { … }; enum { … }; static inline void ef4_filter_init_rx(struct ef4_filter_spec *spec, enum ef4_filter_priority priority, enum ef4_filter_flags flags, unsigned rxq_id) { … } static inline void ef4_filter_init_tx(struct ef4_filter_spec *spec, unsigned txq_id) { … } /** * ef4_filter_set_ipv4_local - specify IPv4 host, transport protocol and port * @spec: Specification to initialise * @proto: Transport layer protocol number * @host: Local host address (network byte order) * @port: Local port (network byte order) */ static inline int ef4_filter_set_ipv4_local(struct ef4_filter_spec *spec, u8 proto, __be32 host, __be16 port) { … } /** * ef4_filter_set_ipv4_full - specify IPv4 hosts, transport protocol and ports * @spec: Specification to initialise * @proto: Transport layer protocol number * @lhost: Local host address (network byte order) * @lport: Local port (network byte order) * @rhost: Remote host address (network byte order) * @rport: Remote port (network byte order) */ static inline int ef4_filter_set_ipv4_full(struct ef4_filter_spec *spec, u8 proto, __be32 lhost, __be16 lport, __be32 rhost, __be16 rport) { … } enum { … }; /** * ef4_filter_set_eth_local - specify local Ethernet address and/or VID * @spec: Specification to initialise * @vid: Outer VLAN ID to match, or %EF4_FILTER_VID_UNSPEC * @addr: Local Ethernet MAC address, or %NULL */ static inline int ef4_filter_set_eth_local(struct ef4_filter_spec *spec, u16 vid, const u8 *addr) { … } /** * ef4_filter_set_uc_def - specify matching otherwise-unmatched unicast * @spec: Specification to initialise */ static inline int ef4_filter_set_uc_def(struct ef4_filter_spec *spec) { … } /** * ef4_filter_set_mc_def - specify matching otherwise-unmatched multicast * @spec: Specification to initialise */ static inline int ef4_filter_set_mc_def(struct ef4_filter_spec *spec) { … } #endif /* EF4_FILTER_H */
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