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/****************************************************************************
* Driver for Solarflare Solarstorm network controllers and boards
* Copyright 2005-2010 Solarflare Communications 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_FILTER_H
#define EFX_FILTER_H
#include <linux/types.h>
/**
* enum efx_filter_type - type of hardware filter
* @EFX_FILTER_TCP_FULL: Matching TCP/IPv4 4-tuple
* @EFX_FILTER_TCP_WILD: Matching TCP/IPv4 destination (host, port)
* @EFX_FILTER_UDP_FULL: Matching UDP/IPv4 4-tuple
* @EFX_FILTER_UDP_WILD: Matching UDP/IPv4 destination (host, port)
* @EFX_FILTER_MAC_FULL: Matching Ethernet destination MAC address, VID
* @EFX_FILTER_MAC_WILD: Matching Ethernet destination MAC address
* @EFX_FILTER_UNSPEC: Match type is unspecified
*
* Falcon NICs only support the TCP/IPv4 and UDP/IPv4 filter types.
*/
enum efx_filter_type {
EFX_FILTER_TCP_FULL = 0,
EFX_FILTER_TCP_WILD,
EFX_FILTER_UDP_FULL,
EFX_FILTER_UDP_WILD,
EFX_FILTER_MAC_FULL = 4,
EFX_FILTER_MAC_WILD,
EFX_FILTER_TYPE_COUNT, /* number of specific types */
EFX_FILTER_UNSPEC = 0xf,
};
/**
* enum efx_filter_priority - priority of a hardware filter specification
* @EFX_FILTER_PRI_HINT: Performance hint
* @EFX_FILTER_PRI_MANUAL: Manually configured filter
* @EFX_FILTER_PRI_REQUIRED: Required for correct behaviour
*/
enum efx_filter_priority {
EFX_FILTER_PRI_HINT = 0,
EFX_FILTER_PRI_MANUAL,
EFX_FILTER_PRI_REQUIRED,
};
/**
* enum efx_filter_flags - flags for hardware filter specifications
* @EFX_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.
* @EFX_FILTER_FLAG_RX_SCATTER: Enable DMA scatter on the receiving
* queue.
* @EFX_FILTER_FLAG_RX_OVERRIDE_IP: Enables a MAC filter to override
* any IP filter that matches the same packet. By default, IP
* filters take precedence.
* @EFX_FILTER_FLAG_RX: Filter is for RX
*/
enum efx_filter_flags {
EFX_FILTER_FLAG_RX_RSS = 0x01,
EFX_FILTER_FLAG_RX_SCATTER = 0x02,
EFX_FILTER_FLAG_RX_OVERRIDE_IP = 0x04,
EFX_FILTER_FLAG_RX = 0x08,
};
/**
* struct efx_filter_spec - specification for a hardware filter
* @type: Type of match to be performed, from &enum efx_filter_type
* @priority: Priority of the filter, from &enum efx_filter_priority
* @flags: Miscellaneous flags, from &enum efx_filter_flags
* @dmaq_id: Source/target queue index
* @data: Match data (type-dependent)
*
* Use the efx_filter_set_*() functions to initialise the @type and
* @data fields.
*/
struct efx_filter_spec {
u8 type:4;
u8 priority:4;
u8 flags;
u16 dmaq_id;
u32 data[3];
};
static inline void efx_filter_init_rx(struct efx_filter_spec *spec,
enum efx_filter_priority priority,
enum efx_filter_flags flags,
unsigned rxq_id)
{
spec->type = EFX_FILTER_UNSPEC;
spec->priority = priority;
spec->flags = EFX_FILTER_FLAG_RX | flags;
spec->dmaq_id = rxq_id;
}
extern int efx_filter_set_ipv4_local(struct efx_filter_spec *spec, u8 proto,
__be32 host, __be16 port);
extern int efx_filter_set_ipv4_full(struct efx_filter_spec *spec, u8 proto,
__be32 host, __be16 port,
__be32 rhost, __be16 rport);
extern int efx_filter_set_eth_local(struct efx_filter_spec *spec,
u16 vid, const u8 *addr);
enum {
EFX_FILTER_VID_UNSPEC = 0xffff,
};
#endif /* EFX_FILTER_H */
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