| /* |
| * Network offload device definitions. |
| * |
| * Copyright (C) 2003-2009 Chelsio Communications. All rights reserved. |
| * |
| * Written by Dimitris Michailidis (dm@chelsio.com) |
| * |
| * 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 LICENSE file included in this |
| * release for licensing terms and conditions. |
| */ |
| |
| #ifndef _OFFLOAD_DEV_H_ |
| #define _OFFLOAD_DEV_H_ |
| |
| struct neighbour; |
| |
| /* Parameter values for offload_get_phys_egress() */ |
| enum { |
| TOE_OPEN, |
| TOE_FAILOVER, |
| }; |
| |
| /* Parameter values for toe_failover() */ |
| enum { |
| TOE_ACTIVE_SLAVE, |
| TOE_LINK_DOWN, |
| TOE_LINK_UP, |
| TOE_RELEASE, |
| TOE_RELEASE_ALL, |
| TOE_BOND_DOWN, |
| TOE_BOND_UP, |
| }; |
| |
| #if defined(CONFIG_TCP_OFFLOAD) || defined(CONFIG_TCP_OFFLOAD_MODULE) |
| #include <linux/list.h> |
| #include <linux/netdevice.h> |
| |
| #define TOENAMSIZ 16 |
| |
| /* belongs in linux/if.h */ |
| #define IFF_OFFLOAD_TCPIP (1 << 14) |
| #define IFF_OFFLOAD_TCPIP6 (1 << 15) |
| |
| /* Get the toedev associated with a net_device */ |
| #define TOEDEV(netdev) (*(struct toedev **)&(netdev)->ec_ptr) |
| |
| /* offload type ids */ |
| enum { |
| TOE_ID_CHELSIO_T1 = 1, |
| TOE_ID_CHELSIO_T1C, |
| TOE_ID_CHELSIO_T2, |
| TOE_ID_CHELSIO_T3, |
| TOE_ID_CHELSIO_T3B, |
| TOE_ID_CHELSIO_T3C, |
| }; |
| |
| struct offload_id { |
| unsigned int id; |
| unsigned long data; |
| }; |
| |
| struct net_device; |
| struct tom_info; |
| struct proc_dir_entry; |
| struct sock; |
| struct sk_buff; |
| |
| struct toedev { |
| char name[TOENAMSIZ]; /* TOE device name */ |
| struct list_head toe_list; /* for list linking */ |
| unsigned int ttid; /* TOE type id */ |
| unsigned long flags; /* device flags */ |
| unsigned int mtu; /* max size of TX offloaded data */ |
| unsigned int nconn; /* max # of offloaded connections */ |
| unsigned int nlldev; /* # of associated Ethernet devices */ |
| struct net_device **lldev; /* associated LL devices */ |
| const struct tom_info *offload_mod; /* attached TCP offload module */ |
| struct offload_policy *policy; |
| struct proc_dir_entry *proc_dir; /* root of proc dir for this TOE */ |
| int (*open)(struct toedev *dev); |
| int (*close)(struct toedev *dev); |
| int (*can_offload)(struct toedev *dev, struct sock *sk); |
| int (*connect)(struct toedev *dev, struct sock *sk, |
| struct net_device *egress_dev); |
| int (*send)(struct toedev *dev, struct sk_buff *skb); |
| int (*recv)(struct toedev *dev, struct sk_buff **skb, int n); |
| int (*ctl)(struct toedev *tdev, unsigned int req, void *data); |
| void (*neigh_update)(struct toedev *dev, struct neighbour *neigh); |
| void (*failover)(struct toedev *dev, struct net_device *bond_dev, |
| struct net_device *ndev, int event, struct net_device *last); |
| void *priv; /* driver private data */ |
| void *l2opt; /* optional layer 2 data */ |
| void *l3opt; /* optional layer 3 data */ |
| void *l4opt; /* optional layer 4 data */ |
| void *ulp; /* ulp stuff */ |
| }; |
| |
| struct tom_info { |
| int (*attach)(struct toedev *dev, const struct offload_id *entry); |
| int (*detach)(struct toedev *dev); |
| const char *name; |
| const struct offload_id *id_table; |
| struct list_head list_node; |
| }; |
| |
| static inline void init_offload_dev(struct toedev *dev) |
| { |
| INIT_LIST_HEAD(&dev->toe_list); |
| } |
| |
| static inline int netdev_is_offload(const struct net_device *dev) |
| { |
| return dev->priv_flags & IFF_OFFLOAD_TCPIP; |
| } |
| |
| static inline void netdev_set_offload(struct net_device *dev) |
| { |
| dev->priv_flags |= IFF_OFFLOAD_TCPIP; |
| } |
| |
| static inline void netdev_clear_offload(struct net_device *dev) |
| { |
| dev->priv_flags &= ~IFF_OFFLOAD_TCPIP; |
| } |
| |
| extern int tcp_sack_enabled(void); |
| extern int tcp_timestamps_enabled(void); |
| extern int tcp_win_scaling_enabled(void); |
| extern int tcp_ecn_enabled(void); |
| extern int register_tom(struct tom_info *t); |
| extern int unregister_tom(struct tom_info *t); |
| extern int register_toedev(struct toedev *dev, const char *name); |
| extern int unregister_toedev(struct toedev *dev); |
| extern int activate_offload(struct toedev *dev); |
| extern int deactivate_offload(struct toedev *dev); |
| extern int toe_send(struct toedev *dev, struct sk_buff *skb); |
| extern struct net_device *offload_get_phys_egress(struct net_device *dev, |
| struct sock *sk, |
| int context); |
| #endif |
| |
| #if defined(CONFIG_TCP_OFFLOAD_MODULE) |
| extern int *sysctl_tcp_sack_p; |
| extern int *sysctl_tcp_timestamps_p; |
| extern int *sysctl_tcp_window_scaling_p; |
| |
| static inline int toe_receive_skb(struct toedev *dev, struct sk_buff **skb, |
| int n) |
| { |
| return dev->recv(dev, skb, n); |
| } |
| |
| extern int prepare_tcp_for_offload(void); |
| extern void restore_tcp_to_nonoffload(void); |
| #elif defined(CONFIG_TCP_OFFLOAD) |
| extern int toe_receive_skb(struct toedev *dev, struct sk_buff **skb, int n); |
| #endif |
| |
| #if defined(CONFIG_TCP_OFFLOAD) || \ |
| (defined(CONFIG_TCP_OFFLOAD_MODULE) && defined(MODULE)) |
| extern void toe_neigh_update(struct neighbour *neigh); |
| extern int toe_failover(struct net_device *bond_dev, |
| struct net_device *fail_dev, int event, |
| struct net_device *last_dev); |
| extern int toe_enslave(struct net_device *bond_dev, |
| struct net_device *slave_dev); |
| #else |
| static inline void toe_neigh_update(struct neighbour *neigh) {} |
| static inline int toe_failover(struct net_device *bond_dev, |
| struct net_device *fail_dev, int event, |
| struct net_device *last_dev); |
| {} |
| static inline int toe_enslave(struct net_device *bond_dev, |
| struct net_device *slave_dev) |
| { |
| return 0; |
| } |
| #endif /* CONFIG_TCP_OFFLOAD */ |
| |
| #endif /* _OFFLOAD_DEV_H_ */ |
