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author | np <np@FreeBSD.org> | 2012-06-19 07:34:13 +0000 |
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committer | np <np@FreeBSD.org> | 2012-06-19 07:34:13 +0000 |
commit | 67d5f1a727273d8e141e96c429114dff9fb06ec3 (patch) | |
tree | 9255a545bbd49a0458ed8850371b4fe6ed2cd01f /sys/netinet/toecore.h | |
parent | 27063437e23a5e5e7debf9144ee974d21b6a6774 (diff) | |
download | FreeBSD-src-67d5f1a727273d8e141e96c429114dff9fb06ec3.zip FreeBSD-src-67d5f1a727273d8e141e96c429114dff9fb06ec3.tar.gz |
- Updated TOE support in the kernel.
- Stateful TCP offload drivers for Terminator 3 and 4 (T3 and T4) ASICs.
These are available as t3_tom and t4_tom modules that augment cxgb(4)
and cxgbe(4) respectively. The cxgb/cxgbe drivers continue to work as
usual with or without these extra features.
- iWARP driver for Terminator 3 ASIC (kernel verbs). T4 iWARP in the
works and will follow soon.
Build-tested with make universe.
30s overview
============
What interfaces support TCP offload? Look for TOE4 and/or TOE6 in the
capabilities of an interface:
# ifconfig -m | grep TOE
Enable/disable TCP offload on an interface (just like any other ifnet
capability):
# ifconfig cxgbe0 toe
# ifconfig cxgbe0 -toe
Which connections are offloaded? Look for toe4 and/or toe6 in the
output of netstat and sockstat:
# netstat -np tcp | grep toe
# sockstat -46c | grep toe
Reviewed by: bz, gnn
Sponsored by: Chelsio communications.
MFC after: ~3 months (after 9.1, and after ensuring MFC is feasible)
Diffstat (limited to 'sys/netinet/toecore.h')
-rw-r--r-- | sys/netinet/toecore.h | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/sys/netinet/toecore.h b/sys/netinet/toecore.h new file mode 100644 index 0000000..a381825 --- /dev/null +++ b/sys/netinet/toecore.h @@ -0,0 +1,130 @@ +/*- + * Copyright (c) 2012 Chelsio Communications, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _NETINET_TOE_H_ +#define _NETINET_TOE_H_ + +#ifndef _KERNEL +#error "no user-serviceable parts inside" +#endif + +struct tcpopt; +struct tcphdr; +struct in_conninfo; + +struct toedev { + TAILQ_ENTRY(toedev) link; /* glue for toedev_list */ + void *tod_softc; /* TOE driver private data */ + + /* + * Active open. If a failure occurs, it is reported back by the driver + * via toe_connect_failed. + */ + int (*tod_connect)(struct toedev *, struct socket *, struct rtentry *, + struct sockaddr *); + + /* Passive open. */ + int (*tod_listen_start)(struct toedev *, struct tcpcb *); + int (*tod_listen_stop)(struct toedev *, struct tcpcb *); + + /* + * The kernel uses this routine to pass on any frame it receives for an + * offloaded connection to the TOE driver. This is an unusual event. + */ + void (*tod_input)(struct toedev *, struct tcpcb *, struct mbuf *); + + /* + * This is called by the kernel during pru_rcvd for an offloaded TCP + * connection and provides an opportunity for the TOE driver to manage + * its rx window and credits. + */ + void (*tod_rcvd)(struct toedev *, struct tcpcb *); + + /* + * Transmit routine. The kernel calls this to have the TOE driver + * evaluate whether there is data to be transmitted, and transmit it. + */ + int (*tod_output)(struct toedev *, struct tcpcb *); + + /* Immediate teardown: send RST to peer. */ + int (*tod_send_rst)(struct toedev *, struct tcpcb *); + + /* Initiate orderly disconnect by sending FIN to the peer. */ + int (*tod_send_fin)(struct toedev *, struct tcpcb *); + + /* Called to indicate that the kernel is done with this TCP PCB. */ + void (*tod_pcb_detach)(struct toedev *, struct tcpcb *); + + /* + * The kernel calls this once it has information about an L2 entry that + * the TOE driver enquired about previously (via toe_l2_resolve). + */ + void (*tod_l2_update)(struct toedev *, struct ifnet *, + struct sockaddr *, uint8_t *, uint16_t); + + /* XXX. Route has been redirected. */ + void (*tod_route_redirect)(struct toedev *, struct ifnet *, + struct rtentry *, struct rtentry *); + + /* Syncache interaction. */ + void (*tod_syncache_added)(struct toedev *, void *); + void (*tod_syncache_removed)(struct toedev *, void *); + int (*tod_syncache_respond)(struct toedev *, void *, struct mbuf *); + void (*tod_offload_socket)(struct toedev *, void *, struct socket *); + + /* TCP socket option */ + void (*tod_ctloutput)(struct toedev *, struct tcpcb *, int, int); +}; + +#include <sys/eventhandler.h> +typedef void (*tcp_offload_listen_start_fn)(void *, struct tcpcb *); +typedef void (*tcp_offload_listen_stop_fn)(void *, struct tcpcb *); +EVENTHANDLER_DECLARE(tcp_offload_listen_start, tcp_offload_listen_start_fn); +EVENTHANDLER_DECLARE(tcp_offload_listen_stop, tcp_offload_listen_stop_fn); + +void init_toedev(struct toedev *); +int register_toedev(struct toedev *); +int unregister_toedev(struct toedev *); + +/* + * General interface for looking up L2 information for an IP address. If an + * answer is not available right away then the TOE driver's tod_l2_update will + * be called later. + */ +int toe_l2_resolve(struct toedev *, struct ifnet *, struct sockaddr *, + uint8_t *, uint16_t *); + +void toe_connect_failed(struct toedev *, struct tcpcb *, int); + +void toe_syncache_add(struct in_conninfo *, struct tcpopt *, struct tcphdr *, + struct inpcb *, void *, void *); +int toe_syncache_expand(struct in_conninfo *, struct tcpopt *, struct tcphdr *, + struct socket **); + +int toe_4tuple_check(struct in_conninfo *, struct tcphdr *, struct ifnet *); +#endif |