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linux-sg2042/drivers/net/bonding/bond_3ad.h

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/*
* Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The full GNU General Public License is included in this distribution in the
* file called LICENSE.
*
*/
#ifndef __BOND_3AD_H__
#define __BOND_3AD_H__
#include <asm/byteorder.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
// General definitions
#define BOND_ETH_P_LACPDU 0x8809
#define PKT_TYPE_LACPDU __constant_htons(BOND_ETH_P_LACPDU)
#define AD_TIMER_INTERVAL 100 /*msec*/
#define MULTICAST_LACPDU_ADDR {0x01, 0x80, 0xC2, 0x00, 0x00, 0x02}
#define AD_MULTICAST_LACPDU_ADDR {MULTICAST_LACPDU_ADDR}
#define AD_LACP_SLOW 0
#define AD_LACP_FAST 1
typedef struct mac_addr {
u8 mac_addr_value[ETH_ALEN];
} mac_addr_t;
typedef enum {
AD_BANDWIDTH = 0,
AD_COUNT
} agg_selection_t;
// rx machine states(43.4.11 in the 802.3ad standard)
typedef enum {
AD_RX_DUMMY,
AD_RX_INITIALIZE, // rx Machine
AD_RX_PORT_DISABLED, // rx Machine
AD_RX_LACP_DISABLED, // rx Machine
AD_RX_EXPIRED, // rx Machine
AD_RX_DEFAULTED, // rx Machine
AD_RX_CURRENT // rx Machine
} rx_states_t;
// periodic machine states(43.4.12 in the 802.3ad standard)
typedef enum {
AD_PERIODIC_DUMMY,
AD_NO_PERIODIC, // periodic machine
AD_FAST_PERIODIC, // periodic machine
AD_SLOW_PERIODIC, // periodic machine
AD_PERIODIC_TX // periodic machine
} periodic_states_t;
// mux machine states(43.4.13 in the 802.3ad standard)
typedef enum {
AD_MUX_DUMMY,
AD_MUX_DETACHED, // mux machine
AD_MUX_WAITING, // mux machine
AD_MUX_ATTACHED, // mux machine
AD_MUX_COLLECTING_DISTRIBUTING // mux machine
} mux_states_t;
// tx machine states(43.4.15 in the 802.3ad standard)
typedef enum {
AD_TX_DUMMY,
AD_TRANSMIT // tx Machine
} tx_states_t;
// rx indication types
typedef enum {
AD_TYPE_LACPDU = 1, // type lacpdu
AD_TYPE_MARKER // type marker
} pdu_type_t;
// rx marker indication types
typedef enum {
AD_MARKER_INFORMATION_SUBTYPE = 1, // marker imformation subtype
AD_MARKER_RESPONSE_SUBTYPE // marker response subtype
} bond_marker_subtype_t;
// timers types(43.4.9 in the 802.3ad standard)
typedef enum {
AD_CURRENT_WHILE_TIMER,
AD_ACTOR_CHURN_TIMER,
AD_PERIODIC_TIMER,
AD_PARTNER_CHURN_TIMER,
AD_WAIT_WHILE_TIMER
} ad_timers_t;
#pragma pack(1)
typedef struct ad_header {
struct mac_addr destination_address;
struct mac_addr source_address;
__be16 length_type;
} ad_header_t;
// Link Aggregation Control Protocol(LACP) data unit structure(43.4.2.2 in the 802.3ad standard)
typedef struct lacpdu {
u8 subtype; // = LACP(= 0x01)
u8 version_number;
u8 tlv_type_actor_info; // = actor information(type/length/value)
u8 actor_information_length; // = 20
__be16 actor_system_priority;
struct mac_addr actor_system;
__be16 actor_key;
__be16 actor_port_priority;
__be16 actor_port;
u8 actor_state;
u8 reserved_3_1[3]; // = 0
u8 tlv_type_partner_info; // = partner information
u8 partner_information_length; // = 20
__be16 partner_system_priority;
struct mac_addr partner_system;
__be16 partner_key;
__be16 partner_port_priority;
__be16 partner_port;
u8 partner_state;
u8 reserved_3_2[3]; // = 0
u8 tlv_type_collector_info; // = collector information
u8 collector_information_length; // = 16
__be16 collector_max_delay;
u8 reserved_12[12];
u8 tlv_type_terminator; // = terminator
u8 terminator_length; // = 0
u8 reserved_50[50]; // = 0
} lacpdu_t;
typedef struct lacpdu_header {
struct ad_header ad_header;
struct lacpdu lacpdu;
} lacpdu_header_t;
// Marker Protocol Data Unit(PDU) structure(43.5.3.2 in the 802.3ad standard)
typedef struct bond_marker {
u8 subtype; // = 0x02 (marker PDU)
u8 version_number; // = 0x01
u8 tlv_type; // = 0x01 (marker information)
// = 0x02 (marker response information)
u8 marker_length; // = 0x16
u16 requester_port; // The number assigned to the port by the requester
struct mac_addr requester_system; // The requester's system id
u32 requester_transaction_id; // The transaction id allocated by the requester,
u16 pad; // = 0
u8 tlv_type_terminator; // = 0x00
u8 terminator_length; // = 0x00
u8 reserved_90[90]; // = 0
} bond_marker_t;
typedef struct bond_marker_header {
struct ad_header ad_header;
struct bond_marker marker;
} bond_marker_header_t;
#pragma pack()
struct slave;
struct bonding;
struct ad_info;
struct port;
#ifdef __ia64__
#pragma pack(8)
#endif
// aggregator structure(43.4.5 in the 802.3ad standard)
typedef struct aggregator {
struct mac_addr aggregator_mac_address;
u16 aggregator_identifier;
u16 is_individual; // BOOLEAN
u16 actor_admin_aggregator_key;
u16 actor_oper_aggregator_key;
struct mac_addr partner_system;
u16 partner_system_priority;
u16 partner_oper_aggregator_key;
u16 receive_state; // BOOLEAN
u16 transmit_state; // BOOLEAN
struct port *lag_ports;
// ****** PRIVATE PARAMETERS ******
struct slave *slave; // pointer to the bond slave that this aggregator belongs to
u16 is_active; // BOOLEAN. Indicates if this aggregator is active
u16 num_of_ports;
} aggregator_t;
// port structure(43.4.6 in the 802.3ad standard)
typedef struct port {
u16 actor_port_number;
u16 actor_port_priority;
struct mac_addr actor_system; // This parameter is added here although it is not specified in the standard, just for simplification
u16 actor_system_priority; // This parameter is added here although it is not specified in the standard, just for simplification
u16 actor_port_aggregator_identifier;
u16 ntt; // BOOLEAN
u16 actor_admin_port_key;
u16 actor_oper_port_key;
u8 actor_admin_port_state;
u8 actor_oper_port_state;
struct mac_addr partner_admin_system;
struct mac_addr partner_oper_system;
u16 partner_admin_system_priority;
u16 partner_oper_system_priority;
u16 partner_admin_key;
u16 partner_oper_key;
u16 partner_admin_port_number;
u16 partner_oper_port_number;
u16 partner_admin_port_priority;
u16 partner_oper_port_priority;
u8 partner_admin_port_state;
u8 partner_oper_port_state;
u16 is_enabled; // BOOLEAN
// ****** PRIVATE PARAMETERS ******
u16 sm_vars; // all state machines variables for this port
rx_states_t sm_rx_state; // state machine rx state
u16 sm_rx_timer_counter; // state machine rx timer counter
periodic_states_t sm_periodic_state;// state machine periodic state
u16 sm_periodic_timer_counter; // state machine periodic timer counter
mux_states_t sm_mux_state; // state machine mux state
u16 sm_mux_timer_counter; // state machine mux timer counter
tx_states_t sm_tx_state; // state machine tx state
u16 sm_tx_timer_counter; // state machine tx timer counter(allways on - enter to transmit state 3 time per second)
struct slave *slave; // pointer to the bond slave that this port belongs to
struct aggregator *aggregator; // pointer to an aggregator that this port related to
struct port *next_port_in_aggregator; // Next port on the linked list of the parent aggregator
u32 transaction_id; // continuous number for identification of Marker PDU's;
struct lacpdu lacpdu; // the lacpdu that will be sent for this port
} port_t;
// system structure
typedef struct ad_system {
u16 sys_priority;
struct mac_addr sys_mac_addr;
} ad_system_t;
#ifdef __ia64__
#pragma pack()
#endif
// ================= AD Exported structures to the main bonding code ==================
#define BOND_AD_INFO(bond) ((bond)->ad_info)
#define SLAVE_AD_INFO(slave) ((slave)->ad_info)
struct ad_bond_info {
ad_system_t system; // 802.3ad system structure
u32 agg_select_timer; // Timer to select aggregator after all adapter's hand shakes
u32 agg_select_mode; // Mode of selection of active aggregator(bandwidth/count)
int lacp_fast; /* whether fast periodic tx should be
* requested
*/
struct timer_list ad_timer;
struct packet_type ad_pkt_type;
};
struct ad_slave_info {
struct aggregator aggregator; // 802.3ad aggregator structure
struct port port; // 802.3ad port structure
spinlock_t rx_machine_lock; // To avoid race condition between callback and receive interrupt
u16 id;
};
// ================= AD Exported functions to the main bonding code ==================
void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution, int lacp_fast);
int bond_3ad_bind_slave(struct slave *slave);
void bond_3ad_unbind_slave(struct slave *slave);
void bond_3ad_state_machine_handler(struct work_struct *);
void bond_3ad_adapter_speed_changed(struct slave *slave);
void bond_3ad_adapter_duplex_changed(struct slave *slave);
void bond_3ad_handle_link_change(struct slave *slave, char link);
int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info);
int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev);
int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type* ptype, struct net_device *orig_dev);
int bond_3ad_set_carrier(struct bonding *bond);
#endif //__BOND_3AD_H__
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