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Diffstat (limited to 'drivers/net/sfc/filter.h')
| -rw-r--r-- | drivers/net/sfc/filter.h | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/drivers/net/sfc/filter.h b/drivers/net/sfc/filter.h new file mode 100644 index 00000000000..a53319ded79 --- /dev/null +++ b/drivers/net/sfc/filter.h @@ -0,0 +1,189 @@ +/**************************************************************************** + * 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_table_id { + EFX_FILTER_TABLE_RX_IP = 0, + EFX_FILTER_TABLE_RX_MAC, + EFX_FILTER_TABLE_COUNT, +}; + +/** + * enum efx_filter_type - type of hardware filter + * @EFX_FILTER_RX_TCP_FULL: RX, matching TCP/IPv4 4-tuple + * @EFX_FILTER_RX_TCP_WILD: RX, matching TCP/IPv4 destination (host, port) + * @EFX_FILTER_RX_UDP_FULL: RX, matching UDP/IPv4 4-tuple + * @EFX_FILTER_RX_UDP_WILD: RX, matching UDP/IPv4 destination (host, port) + * @EFX_FILTER_RX_MAC_FULL: RX, matching Ethernet destination MAC address, VID + * @EFX_FILTER_RX_MAC_WILD: RX, matching Ethernet destination MAC address + * + * Falcon NICs only support the RX TCP/IPv4 and UDP/IPv4 filter types. + */ +enum efx_filter_type { + EFX_FILTER_RX_TCP_FULL = 0, + EFX_FILTER_RX_TCP_WILD, + EFX_FILTER_RX_UDP_FULL, + EFX_FILTER_RX_UDP_WILD, + EFX_FILTER_RX_MAC_FULL = 4, + EFX_FILTER_RX_MAC_WILD, + EFX_FILTER_TYPE_COUNT, +}; + +/** + * 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. + * + * Currently, no flags are defined for TX filters. + */ +enum efx_filter_flags { + EFX_FILTER_FLAG_RX_RSS = 0x01, + EFX_FILTER_FLAG_RX_SCATTER = 0x02, + EFX_FILTER_FLAG_RX_OVERRIDE_IP = 0x04, +}; + +/** + * 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]; +}; + +/** + * efx_filter_set_rx_tcp_full - specify RX filter with TCP/IPv4 full match + * @spec: Specification to initialise + * @shost: Source host address (host byte order) + * @sport: Source port (host byte order) + * @dhost: Destination host address (host byte order) + * @dport: Destination port (host byte order) + */ +static inline void +efx_filter_set_rx_tcp_full(struct efx_filter_spec *spec, + u32 shost, u16 sport, u32 dhost, u16 dport) +{ + spec->type = EFX_FILTER_RX_TCP_FULL; + spec->data[0] = sport | shost << 16; + spec->data[1] = dport << 16 | shost >> 16; + spec->data[2] = dhost; +} + +/** + * efx_filter_set_rx_tcp_wild - specify RX filter with TCP/IPv4 wildcard match + * @spec: Specification to initialise + * @dhost: Destination host address (host byte order) + * @dport: Destination port (host byte order) + */ +static inline void +efx_filter_set_rx_tcp_wild(struct efx_filter_spec *spec, u32 dhost, u16 dport) +{ + spec->type = EFX_FILTER_RX_TCP_WILD; + spec->data[0] = 0; + spec->data[1] = dport << 16; + spec->data[2] = dhost; +} + +/** + * efx_filter_set_rx_udp_full - specify RX filter with UDP/IPv4 full match + * @spec: Specification to initialise + * @shost: Source host address (host byte order) + * @sport: Source port (host byte order) + * @dhost: Destination host address (host byte order) + * @dport: Destination port (host byte order) + */ +static inline void +efx_filter_set_rx_udp_full(struct efx_filter_spec *spec, + u32 shost, u16 sport, u32 dhost, u16 dport) +{ + spec->type = EFX_FILTER_RX_UDP_FULL; + spec->data[0] = sport | shost << 16; + spec->data[1] = dport << 16 | shost >> 16; + spec->data[2] = dhost; +} + +/** + * efx_filter_set_rx_udp_wild - specify RX filter with UDP/IPv4 wildcard match + * @spec: Specification to initialise + * @dhost: Destination host address (host byte order) + * @dport: Destination port (host byte order) + */ +static inline void +efx_filter_set_rx_udp_wild(struct efx_filter_spec *spec, u32 dhost, u16 dport) +{ + spec->type = EFX_FILTER_RX_UDP_WILD; + spec->data[0] = dport; + spec->data[1] = 0; + spec->data[2] = dhost; +} + +/** + * efx_filter_set_rx_mac_full - specify RX filter with MAC full match + * @spec: Specification to initialise + * @vid: VLAN ID + * @addr: Destination MAC address + */ +static inline void efx_filter_set_rx_mac_full(struct efx_filter_spec *spec, + u16 vid, const u8 *addr) +{ + spec->type = EFX_FILTER_RX_MAC_FULL; + spec->data[0] = vid; + spec->data[1] = addr[2] << 24 | addr[3] << 16 | addr[4] << 8 | addr[5]; + spec->data[2] = addr[0] << 8 | addr[1]; +} + +/** + * efx_filter_set_rx_mac_full - specify RX filter with MAC wildcard match + * @spec: Specification to initialise + * @addr: Destination MAC address + */ +static inline void efx_filter_set_rx_mac_wild(struct efx_filter_spec *spec, + const u8 *addr) +{ + spec->type = EFX_FILTER_RX_MAC_WILD; + spec->data[0] = 0; + spec->data[1] = addr[2] << 24 | addr[3] << 16 | addr[4] << 8 | addr[5]; + spec->data[2] = addr[0] << 8 | addr[1]; +} + +#endif /* EFX_FILTER_H */ |