Automatic merge of /spare/repo/netdev-2.6 branch 8139too-iomap
[linux-2.6] / drivers / net / bonding / bond_alb.h
1 /*
2  * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
3  *
4  * This program is free software; you can redistribute it and/or modify it
5  * under the terms of the GNU General Public License as published by the
6  * Free Software Foundation; either version 2 of the License, or
7  * (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful, but
10  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * for more details.
13  *
14  * You should have received a copy of the GNU General Public License along
15  * with this program; if not, write to the Free Software Foundation, Inc.,
16  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
17  *
18  * The full GNU General Public License is included in this distribution in the
19  * file called LICENSE.
20  *
21  *
22  * Changes:
23  *
24  * 2003/08/06 - Amir Noam <amir.noam at intel dot com>
25  *      - Add support for setting bond's MAC address with special
26  *        handling required for ALB/TLB.
27  *
28  * 2003/12/01 - Shmulik Hen <shmulik.hen at intel dot com>
29  *      - Code cleanup and style changes
30  */
31
32 #ifndef __BOND_ALB_H__
33 #define __BOND_ALB_H__
34
35 #include <linux/if_ether.h>
36
37 struct bonding;
38 struct slave;
39
40 #define BOND_ALB_INFO(bond)   ((bond)->alb_info)
41 #define SLAVE_TLB_INFO(slave) ((slave)->tlb_info)
42
43 struct tlb_client_info {
44         struct slave *tx_slave; /* A pointer to slave used for transmiting
45                                  * packets to a Client that the Hash function
46                                  * gave this entry index.
47                                  */
48         u32 tx_bytes;           /* Each Client acumulates the BytesTx that
49                                  * were tranmitted to it, and after each
50                                  * CallBack the LoadHistory is devided
51                                  * by the balance interval
52                                  */
53         u32 load_history;       /* This field contains the amount of Bytes
54                                  * that were transmitted to this client by
55                                  * the server on the previous balance
56                                  * interval in Bps.
57                                  */
58         u32 next;               /* The next Hash table entry index, assigned
59                                  * to use the same adapter for transmit.
60                                  */
61         u32 prev;               /* The previous Hash table entry index,
62                                  * assigned to use the same
63                                  */
64 };
65
66 /* -------------------------------------------------------------------------
67  * struct rlb_client_info contains all info related to a specific rx client
68  * connection. This is the Clients Hash Table entry struct
69  * -------------------------------------------------------------------------
70  */
71 struct rlb_client_info {
72         u32 ip_src;             /* the server IP address */
73         u32 ip_dst;             /* the client IP address */
74         u8  mac_dst[ETH_ALEN];  /* the client MAC address */
75         u32 next;               /* The next Hash table entry index */
76         u32 prev;               /* The previous Hash table entry index */
77         u8  assigned;           /* checking whether this entry is assigned */
78         u8  ntt;                /* flag - need to transmit client info */
79         struct slave *slave;    /* the slave assigned to this client */
80         u8 tag;                 /* flag - need to tag skb */
81         unsigned short vlan_id; /* VLAN tag associated with IP address */
82 };
83
84 struct tlb_slave_info {
85         u32 head;       /* Index to the head of the bi-directional clients
86                          * hash table entries list. The entries in the list
87                          * are the entries that were assigned to use this
88                          * slave for transmit.
89                          */
90         u32 load;       /* Each slave sums the loadHistory of all clients
91                          * assigned to it
92                          */
93 };
94
95 struct alb_bond_info {
96         struct timer_list       alb_timer;
97         struct tlb_client_info  *tx_hashtbl; /* Dynamically allocated */
98         spinlock_t              tx_hashtbl_lock;
99         u32                     unbalanced_load;
100         int                     tx_rebalance_counter;
101         int                     lp_counter;
102         /* -------- rlb parameters -------- */
103         int rlb_enabled;
104         struct packet_type      rlb_pkt_type;
105         struct rlb_client_info  *rx_hashtbl;    /* Receive hash table */
106         spinlock_t              rx_hashtbl_lock;
107         u32                     rx_hashtbl_head;
108         u8                      rx_ntt; /* flag - need to transmit
109                                          * to all rx clients
110                                          */
111         struct slave            *next_rx_slave;/* next slave to be assigned
112                                                 * to a new rx client for
113                                                 */
114         u32                     rlb_interval_counter;
115         u8                      primary_is_promisc;        /* boolean */
116         u32                     rlb_promisc_timeout_counter;/* counts primary
117                                                              * promiscuity time
118                                                              */
119         u32                     rlb_update_delay_counter;
120         u32                     rlb_update_retry_counter;/* counter of retries
121                                                           * of client update
122                                                           */
123         u8                      rlb_rebalance;  /* flag - indicates that the
124                                                  * rx traffic should be
125                                                  * rebalanced
126                                                  */
127         struct vlan_entry       *current_alb_vlan;
128 };
129
130 int bond_alb_initialize(struct bonding *bond, int rlb_enabled);
131 void bond_alb_deinitialize(struct bonding *bond);
132 int bond_alb_init_slave(struct bonding *bond, struct slave *slave);
133 void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave);
134 void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link);
135 void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave);
136 int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev);
137 void bond_alb_monitor(struct bonding *bond);
138 int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr);
139 void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id);
140 #endif /* __BOND_ALB_H__ */
141