125 lines
4.2 KiB
C
125 lines
4.2 KiB
C
/****************************************************************************
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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_TCP_FULL: Matching TCP/IPv4 4-tuple
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* @EFX_FILTER_TCP_WILD: Matching TCP/IPv4 destination (host, port)
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* @EFX_FILTER_UDP_FULL: Matching UDP/IPv4 4-tuple
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* @EFX_FILTER_UDP_WILD: Matching UDP/IPv4 destination (host, port)
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* @EFX_FILTER_MAC_FULL: Matching Ethernet destination MAC address, VID
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* @EFX_FILTER_MAC_WILD: Matching Ethernet destination MAC address
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* @EFX_FILTER_UNSPEC: Match type is unspecified
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*
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* Falcon NICs only support the 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_TCP_FULL = 0,
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EFX_FILTER_TCP_WILD,
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EFX_FILTER_UDP_FULL,
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EFX_FILTER_UDP_WILD,
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EFX_FILTER_MAC_FULL = 4,
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EFX_FILTER_MAC_WILD,
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EFX_FILTER_TYPE_COUNT, /* number of specific types */
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EFX_FILTER_UNSPEC = 0xf,
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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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* @EFX_FILTER_FLAG_RX: Filter is for RX
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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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EFX_FILTER_FLAG_RX = 0x08,
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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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* The @priority field is used by software to determine whether a new
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* filter may replace an old one. The hardware priority of a filter
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* depends on the filter type and %EFX_FILTER_FLAG_RX_OVERRIDE_IP
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* flag.
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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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static inline void efx_filter_init_rx(struct efx_filter_spec *spec,
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enum efx_filter_priority priority,
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enum efx_filter_flags flags,
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unsigned rxq_id)
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{
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spec->type = EFX_FILTER_UNSPEC;
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spec->priority = priority;
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spec->flags = EFX_FILTER_FLAG_RX | flags;
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spec->dmaq_id = rxq_id;
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}
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extern int efx_filter_set_ipv4_local(struct efx_filter_spec *spec, u8 proto,
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__be32 host, __be16 port);
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extern int efx_filter_get_ipv4_local(const struct efx_filter_spec *spec,
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u8 *proto, __be32 *host, __be16 *port);
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extern int efx_filter_set_ipv4_full(struct efx_filter_spec *spec, u8 proto,
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__be32 host, __be16 port,
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__be32 rhost, __be16 rport);
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extern int efx_filter_get_ipv4_full(const struct efx_filter_spec *spec,
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u8 *proto, __be32 *host, __be16 *port,
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__be32 *rhost, __be16 *rport);
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extern int efx_filter_set_eth_local(struct efx_filter_spec *spec,
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u16 vid, const u8 *addr);
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extern int efx_filter_get_eth_local(const struct efx_filter_spec *spec,
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u16 *vid, u8 *addr);
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enum {
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EFX_FILTER_VID_UNSPEC = 0xffff,
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};
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#endif /* EFX_FILTER_H */
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