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184 lines
5.8 KiB
C
184 lines
5.8 KiB
C
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/****************************************************************************
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* Driver for Solarflare Solarstorm network controllers and boards
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* Copyright 2005-2010 Solarflare Communications Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation, incorporated herein by reference.
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*/
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#ifndef EFX_FILTER_H
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#define EFX_FILTER_H
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#include <linux/types.h>
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/**
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* enum efx_filter_type - type of hardware filter
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* @EFX_FILTER_RX_TCP_FULL: RX, matching TCP/IPv4 4-tuple
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* @EFX_FILTER_RX_TCP_WILD: RX, matching TCP/IPv4 destination (host, port)
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* @EFX_FILTER_RX_UDP_FULL: RX, matching UDP/IPv4 4-tuple
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* @EFX_FILTER_RX_UDP_WILD: RX, matching UDP/IPv4 destination (host, port)
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* @EFX_FILTER_RX_MAC_FULL: RX, matching Ethernet destination MAC address, VID
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* @EFX_FILTER_RX_MAC_WILD: RX, matching Ethernet destination MAC address
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*
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* Falcon NICs only support the RX TCP/IPv4 and UDP/IPv4 filter types.
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*/
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enum efx_filter_type {
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EFX_FILTER_RX_TCP_FULL = 0,
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EFX_FILTER_RX_TCP_WILD,
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EFX_FILTER_RX_UDP_FULL,
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EFX_FILTER_RX_UDP_WILD,
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EFX_FILTER_RX_MAC_FULL = 4,
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EFX_FILTER_RX_MAC_WILD,
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EFX_FILTER_TYPE_COUNT,
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};
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/**
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* enum efx_filter_priority - priority of a hardware filter specification
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* @EFX_FILTER_PRI_HINT: Performance hint
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* @EFX_FILTER_PRI_MANUAL: Manually configured filter
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* @EFX_FILTER_PRI_REQUIRED: Required for correct behaviour
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*/
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enum efx_filter_priority {
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EFX_FILTER_PRI_HINT = 0,
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EFX_FILTER_PRI_MANUAL,
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EFX_FILTER_PRI_REQUIRED,
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};
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/**
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* enum efx_filter_flags - flags for hardware filter specifications
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* @EFX_FILTER_FLAG_RX_RSS: Use RSS to spread across multiple queues.
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* By default, matching packets will be delivered only to the
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* specified queue. If this flag is set, they will be delivered
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* to a range of queues offset from the specified queue number
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* according to the indirection table.
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* @EFX_FILTER_FLAG_RX_SCATTER: Enable DMA scatter on the receiving
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* queue.
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* @EFX_FILTER_FLAG_RX_OVERRIDE_IP: Enables a MAC filter to override
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* any IP filter that matches the same packet. By default, IP
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* filters take precedence.
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*
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* Currently, no flags are defined for TX filters.
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*/
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enum efx_filter_flags {
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EFX_FILTER_FLAG_RX_RSS = 0x01,
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EFX_FILTER_FLAG_RX_SCATTER = 0x02,
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EFX_FILTER_FLAG_RX_OVERRIDE_IP = 0x04,
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};
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/**
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* struct efx_filter_spec - specification for a hardware filter
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* @type: Type of match to be performed, from &enum efx_filter_type
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* @priority: Priority of the filter, from &enum efx_filter_priority
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* @flags: Miscellaneous flags, from &enum efx_filter_flags
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* @dmaq_id: Source/target queue index
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* @data: Match data (type-dependent)
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*
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* Use the efx_filter_set_*() functions to initialise the @type and
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* @data fields.
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*/
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struct efx_filter_spec {
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u8 type:4;
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u8 priority:4;
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u8 flags;
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u16 dmaq_id;
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u32 data[3];
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};
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/**
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* efx_filter_set_rx_tcp_full - specify RX filter with TCP/IPv4 full match
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* @spec: Specification to initialise
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* @shost: Source host address (host byte order)
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* @sport: Source port (host byte order)
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* @dhost: Destination host address (host byte order)
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* @dport: Destination port (host byte order)
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*/
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static inline void
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efx_filter_set_rx_tcp_full(struct efx_filter_spec *spec,
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u32 shost, u16 sport, u32 dhost, u16 dport)
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{
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spec->type = EFX_FILTER_RX_TCP_FULL;
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spec->data[0] = sport | shost << 16;
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spec->data[1] = dport << 16 | shost >> 16;
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spec->data[2] = dhost;
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}
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/**
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* efx_filter_set_rx_tcp_wild - specify RX filter with TCP/IPv4 wildcard match
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* @spec: Specification to initialise
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* @dhost: Destination host address (host byte order)
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* @dport: Destination port (host byte order)
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*/
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static inline void
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efx_filter_set_rx_tcp_wild(struct efx_filter_spec *spec, u32 dhost, u16 dport)
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{
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spec->type = EFX_FILTER_RX_TCP_WILD;
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spec->data[0] = 0;
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spec->data[1] = dport << 16;
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spec->data[2] = dhost;
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}
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/**
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* efx_filter_set_rx_udp_full - specify RX filter with UDP/IPv4 full match
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* @spec: Specification to initialise
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* @shost: Source host address (host byte order)
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* @sport: Source port (host byte order)
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* @dhost: Destination host address (host byte order)
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* @dport: Destination port (host byte order)
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*/
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static inline void
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efx_filter_set_rx_udp_full(struct efx_filter_spec *spec,
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u32 shost, u16 sport, u32 dhost, u16 dport)
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{
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spec->type = EFX_FILTER_RX_UDP_FULL;
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spec->data[0] = sport | shost << 16;
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spec->data[1] = dport << 16 | shost >> 16;
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spec->data[2] = dhost;
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}
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/**
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* efx_filter_set_rx_udp_wild - specify RX filter with UDP/IPv4 wildcard match
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* @spec: Specification to initialise
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* @dhost: Destination host address (host byte order)
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* @dport: Destination port (host byte order)
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*/
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static inline void
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efx_filter_set_rx_udp_wild(struct efx_filter_spec *spec, u32 dhost, u16 dport)
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{
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spec->type = EFX_FILTER_RX_UDP_WILD;
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spec->data[0] = dport;
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spec->data[1] = 0;
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spec->data[2] = dhost;
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}
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/**
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* efx_filter_set_rx_mac_full - specify RX filter with MAC full match
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* @spec: Specification to initialise
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* @vid: VLAN ID
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* @addr: Destination MAC address
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*/
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static inline void efx_filter_set_rx_mac_full(struct efx_filter_spec *spec,
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u16 vid, const u8 *addr)
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{
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spec->type = EFX_FILTER_RX_MAC_FULL;
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spec->data[0] = vid;
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spec->data[1] = addr[2] << 24 | addr[3] << 16 | addr[4] << 8 | addr[5];
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spec->data[2] = addr[0] << 8 | addr[1];
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}
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/**
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* efx_filter_set_rx_mac_full - specify RX filter with MAC wildcard match
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* @spec: Specification to initialise
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* @addr: Destination MAC address
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*/
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static inline void efx_filter_set_rx_mac_wild(struct efx_filter_spec *spec,
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const u8 *addr)
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{
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spec->type = EFX_FILTER_RX_MAC_WILD;
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spec->data[0] = 0;
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spec->data[1] = addr[2] << 24 | addr[3] << 16 | addr[4] << 8 | addr[5];
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spec->data[2] = addr[0] << 8 | addr[1];
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}
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#endif /* EFX_FILTER_H */
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