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authornp <np@FreeBSD.org>2012-06-19 07:34:13 +0000
committernp <np@FreeBSD.org>2012-06-19 07:34:13 +0000
commit67d5f1a727273d8e141e96c429114dff9fb06ec3 (patch)
tree9255a545bbd49a0458ed8850371b4fe6ed2cd01f /sys/netinet/toecore.h
parent27063437e23a5e5e7debf9144ee974d21b6a6774 (diff)
downloadFreeBSD-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')
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diff --git a/sys/netinet/toecore.h b/sys/netinet/toecore.h
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+/*-
+ * 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
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