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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.

 *

 *

 * Changes:

 *

 * 2003/05/01 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and

 *              Amir Noam <amir.noam at intel dot com>

 *      - Added support for lacp_rate module param.

 *

 * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com>

 *      - Renamed bond_3ad_link_status_changed() to

 *        bond_3ad_handle_link_change() for compatibility with TLB.

 *

 * 2003/12/01 - Shmulik Hen <shmulik.hen at intel dot com>

 *      - Code cleanup and style changes

 */

#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

} 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;

        u16 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

        u16 actor_system_priority;

        struct mac_addr actor_system;

        u16 actor_key;

        u16 actor_port_priority;

        u16 actor_port;

        u8 actor_state;

        u8 reserved_3_1[3];          // = 0

        u8 tlv_type_partner_info;     // = partner information

        u8 partner_information_length;   // = 20

        u16 partner_system_priority;

        struct mac_addr partner_system;

        u16 partner_key;

        u16 partner_port_priority;

        u16 partner_port;

        u8 partner_state;

        u8 reserved_3_2[3];          // = 0

        u8 tlv_type_collector_info;       // = collector information

        u8 collector_information_length; // = 16

        u16 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 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

} marker_t;

typedef struct marker_header {

        struct ad_header ad_header;

        struct marker marker;

} 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 bonding *bond);

void bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length);

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);

#endif //__BOND_3AD_H__