From f8720c748375673358a1ad47bd44a3a6a911615b Mon Sep 17 00:00:00 2001 From: hselasky Date: Mon, 3 Nov 2014 12:38:29 +0000 Subject: [PATCH] MFC r271946 and r272595: Improve transmit sending offload, TSO, algorithm in general. This change allows all HCAs from Mellanox Technologies to function properly when TSO is enabled. See r271946 and r272595 for more details about this commit. Sponsored by: Mellanox Technologies git-svn-id: svn://svn.freebsd.org/base/stable/10@274043 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f --- sys/dev/oce/oce_if.c | 4 +- sys/dev/oce/oce_if.h | 1 - sys/dev/vmware/vmxnet3/if_vmx.c | 4 +- sys/dev/vmware/vmxnet3/if_vmxvar.h | 2 - sys/dev/xen/netfront/netfront.c | 5 +- sys/kern/uipc_sockbuf.c | 31 ++++++++ sys/net/if.c | 86 +++++++++++++++++++-- sys/net/if_lagg.c | 16 ++-- sys/net/if_var.h | 28 +++++-- sys/net/if_vlan.c | 6 +- sys/netinet/tcp_input.c | 2 + sys/netinet/tcp_output.c | 106 +++++++++++++++++++++++--- sys/netinet/tcp_subr.c | 4 + sys/netinet/tcp_var.h | 8 +- sys/ofed/drivers/net/mlx4/en_netdev.c | 4 +- sys/sys/sockbuf.h | 2 + 16 files changed, 263 insertions(+), 46 deletions(-) diff --git a/sys/dev/oce/oce_if.c b/sys/dev/oce/oce_if.c index 48f85e687..273089f92 100644 --- a/sys/dev/oce/oce_if.c +++ b/sys/dev/oce/oce_if.c @@ -1735,7 +1735,9 @@ oce_attach_ifp(POCE_SOFTC sc) if_initbaudrate(sc->ifp, IF_Gbps(10)); #if __FreeBSD_version >= 1000000 - sc->ifp->if_hw_tsomax = OCE_MAX_TSO_SIZE; + sc->ifp->if_hw_tsomax = 65536 - (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN); + sc->ifp->if_hw_tsomaxsegcount = OCE_MAX_TX_ELEMENTS; + sc->ifp->if_hw_tsomaxsegsize = 4096; #endif ether_ifattach(sc->ifp, sc->macaddr.mac_addr); diff --git a/sys/dev/oce/oce_if.h b/sys/dev/oce/oce_if.h index 259a9ed01..dc9617097 100644 --- a/sys/dev/oce/oce_if.h +++ b/sys/dev/oce/oce_if.h @@ -150,7 +150,6 @@ extern int mp_ncpus; /* system's total active cpu cores */ #define OCE_MAX_TX_ELEMENTS 29 #define OCE_MAX_TX_DESC 1024 #define OCE_MAX_TX_SIZE 65535 -#define OCE_MAX_TSO_SIZE (65535 - ETHER_HDR_LEN) #define OCE_MAX_RX_SIZE 4096 #define OCE_MAX_RQ_POSTS 255 #define OCE_DEFAULT_PROMISCUOUS 0 diff --git a/sys/dev/vmware/vmxnet3/if_vmx.c b/sys/dev/vmware/vmxnet3/if_vmx.c index 57678927a..f00a10836 100644 --- a/sys/dev/vmware/vmxnet3/if_vmx.c +++ b/sys/dev/vmware/vmxnet3/if_vmx.c @@ -1720,7 +1720,9 @@ vmxnet3_setup_interface(struct vmxnet3_softc *sc) ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; ifp->if_init = vmxnet3_init; ifp->if_ioctl = vmxnet3_ioctl; - ifp->if_hw_tsomax = VMXNET3_TSO_MAXSIZE; + ifp->if_hw_tsomax = 65536 - (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN); + ifp->if_hw_tsomaxsegcount = VMXNET3_TX_MAXSEGS; + ifp->if_hw_tsomaxsegsize = VMXNET3_TX_MAXSEGSIZE; #ifdef VMXNET3_LEGACY_TX ifp->if_start = vmxnet3_start; diff --git a/sys/dev/vmware/vmxnet3/if_vmxvar.h b/sys/dev/vmware/vmxnet3/if_vmxvar.h index 6c797214b..861351603 100644 --- a/sys/dev/vmware/vmxnet3/if_vmxvar.h +++ b/sys/dev/vmware/vmxnet3/if_vmxvar.h @@ -277,8 +277,6 @@ struct vmxnet3_softc { */ #define VMXNET3_TX_MAXSEGS 32 #define VMXNET3_TX_MAXSIZE (VMXNET3_TX_MAXSEGS * MCLBYTES) -#define VMXNET3_TSO_MAXSIZE \ - (VMXNET3_TX_MAXSIZE - sizeof(struct ether_vlan_header)) /* * Maximum support Tx segments size. The length field in the diff --git a/sys/dev/xen/netfront/netfront.c b/sys/dev/xen/netfront/netfront.c index 0890e8dba..3c7636f20 100644 --- a/sys/dev/xen/netfront/netfront.c +++ b/sys/dev/xen/netfront/netfront.c @@ -134,7 +134,6 @@ static const int MODPARM_rx_flip = 0; * to mirror the Linux MAX_SKB_FRAGS constant. */ #define MAX_TX_REQ_FRAGS (65536 / PAGE_SIZE + 2) -#define NF_TSO_MAXBURST ((IP_MAXPACKET / PAGE_SIZE) * MCLBYTES) #define RX_COPY_THRESHOLD 256 @@ -2102,7 +2101,9 @@ create_netdev(device_t dev) ifp->if_hwassist = XN_CSUM_FEATURES; ifp->if_capabilities = IFCAP_HWCSUM; - ifp->if_hw_tsomax = NF_TSO_MAXBURST; + ifp->if_hw_tsomax = 65536 - (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN); + ifp->if_hw_tsomaxsegcount = MAX_TX_REQ_FRAGS; + ifp->if_hw_tsomaxsegsize = PAGE_SIZE; ether_ifattach(ifp, np->mac); callout_init(&np->xn_stat_ch, CALLOUT_MPSAFE); diff --git a/sys/kern/uipc_sockbuf.c b/sys/kern/uipc_sockbuf.c index b66ea6098..0c6734791 100644 --- a/sys/kern/uipc_sockbuf.c +++ b/sys/kern/uipc_sockbuf.c @@ -1014,6 +1014,37 @@ sbsndptr(struct sockbuf *sb, u_int off, u_int len, u_int *moff) return (ret); } +/* + * Return the first mbuf and the mbuf data offset for the provided + * send offset without changing the "sb_sndptroff" field. + */ +struct mbuf * +sbsndmbuf(struct sockbuf *sb, u_int off, u_int *moff) +{ + struct mbuf *m; + + KASSERT(sb->sb_mb != NULL, ("%s: sb_mb is NULL", __func__)); + + /* + * If the "off" is below the stored offset, which happens on + * retransmits, just use "sb_mb": + */ + if (sb->sb_sndptr == NULL || sb->sb_sndptroff > off) { + m = sb->sb_mb; + } else { + m = sb->sb_sndptr; + off -= sb->sb_sndptroff; + } + while (off > 0 && m != NULL) { + if (off < m->m_len) + break; + off -= m->m_len; + m = m->m_next; + } + *moff = off; + return (m); +} + /* * Drop a record off the front of a sockbuf and move the next record to the * front. diff --git a/sys/net/if.c b/sys/net/if.c index a65838450..2e5d0ab1f 100644 --- a/sys/net/if.c +++ b/sys/net/if.c @@ -583,6 +583,57 @@ if_attach(struct ifnet *ifp) if_attach_internal(ifp, 0); } +/* + * Compute the least common TSO limit. + */ +void +if_hw_tsomax_common(struct ifnet *ifp, struct ifnet_hw_tsomax *pmax) +{ + /* + * 1) If there is no limit currently, take the limit from + * the network adapter. + * + * 2) If the network adapter has a limit below the current + * limit, apply it. + */ + if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 && + ifp->if_hw_tsomax < pmax->tsomaxbytes)) { + pmax->tsomaxbytes = ifp->if_hw_tsomax; + } + if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 && + ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) { + pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount; + } + if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 && + ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) { + pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize; + } +} + +/* + * Update TSO limit of a network adapter. + * + * Returns zero if no change. Else non-zero. + */ +int +if_hw_tsomax_update(struct ifnet *ifp, struct ifnet_hw_tsomax *pmax) +{ + int retval = 0; + if (ifp->if_hw_tsomax != pmax->tsomaxbytes) { + ifp->if_hw_tsomax = pmax->tsomaxbytes; + retval++; + } + if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) { + ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize; + retval++; + } + if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) { + ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount; + retval++; + } + return (retval); +} + static void if_attach_internal(struct ifnet *ifp, int vmove) { @@ -657,13 +708,36 @@ if_attach_internal(struct ifnet *ifp, int vmove) ifp->if_broadcastaddr = NULL; #if defined(INET) || defined(INET6) - /* Initialize to max value. */ - if (ifp->if_hw_tsomax == 0) - ifp->if_hw_tsomax = min(IP_MAXPACKET, 32 * MCLBYTES - + /* Use defaults for TSO, if nothing is set */ + if (ifp->if_hw_tsomax == 0 && + ifp->if_hw_tsomaxsegcount == 0 && + ifp->if_hw_tsomaxsegsize == 0) { + /* + * The TSO defaults needs to be such that an + * NFS mbuf list of 35 mbufs totalling just + * below 64K works and that a chain of mbufs + * can be defragged into at most 32 segments: + */ + ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) - (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN)); - KASSERT(ifp->if_hw_tsomax <= IP_MAXPACKET && - ifp->if_hw_tsomax >= IP_MAXPACKET / 8, - ("%s: tsomax outside of range", __func__)); + ifp->if_hw_tsomaxsegcount = 35; + ifp->if_hw_tsomaxsegsize = 2048; /* 2K */ + + /* XXX some drivers set IFCAP_TSO after ethernet attach */ + if (ifp->if_capabilities & IFCAP_TSO) { + if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n", + ifp->if_hw_tsomax, + ifp->if_hw_tsomaxsegcount, + ifp->if_hw_tsomaxsegsize); + } + } + /* + * If the "if_hw_tsomax" limit is set, check if it is + * too small: + */ + KASSERT(ifp->if_hw_tsomax == 0 || + ifp->if_hw_tsomax >= (IP_MAXPACKET / 8), + ("%s: if_hw_tsomax is outside of range", __func__)); #endif } #ifdef VIMAGE diff --git a/sys/net/if_lagg.c b/sys/net/if_lagg.c index 58b7207b5..7218e29b3 100644 --- a/sys/net/if_lagg.c +++ b/sys/net/if_lagg.c @@ -448,23 +448,18 @@ lagg_capabilities(struct lagg_softc *sc) struct lagg_port *lp; int cap = ~0, ena = ~0; u_long hwa = ~0UL; -#if defined(INET) || defined(INET6) - u_int hw_tsomax = IP_MAXPACKET; /* Initialize to the maximum value. */ -#else - u_int hw_tsomax = ~0; /* if_hw_tsomax is only for INET/INET6, but.. */ -#endif + struct ifnet_hw_tsomax hw_tsomax; LAGG_WLOCK_ASSERT(sc); + memset(&hw_tsomax, 0, sizeof(hw_tsomax)); + /* Get capabilities from the lagg ports */ SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { cap &= lp->lp_ifp->if_capabilities; ena &= lp->lp_ifp->if_capenable; hwa &= lp->lp_ifp->if_hwassist; - /* Set to the minimum value of the lagg ports. */ - if (lp->lp_ifp->if_hw_tsomax < hw_tsomax && - lp->lp_ifp->if_hw_tsomax > 0) - hw_tsomax = lp->lp_ifp->if_hw_tsomax; + if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); } cap = (cap == ~0 ? 0 : cap); ena = (ena == ~0 ? 0 : ena); @@ -473,11 +468,10 @@ lagg_capabilities(struct lagg_softc *sc) if (sc->sc_ifp->if_capabilities != cap || sc->sc_ifp->if_capenable != ena || sc->sc_ifp->if_hwassist != hwa || - sc->sc_ifp->if_hw_tsomax != hw_tsomax) { + if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { sc->sc_ifp->if_capabilities = cap; sc->sc_ifp->if_capenable = ena; sc->sc_ifp->if_hwassist = hwa; - sc->sc_ifp->if_hw_tsomax = hw_tsomax; getmicrotime(&sc->sc_ifp->if_lastchange); if (sc->sc_ifflags & IFF_DEBUG) diff --git a/sys/net/if_var.h b/sys/net/if_var.h index 677a688e4..93127287b 100644 --- a/sys/net/if_var.h +++ b/sys/net/if_var.h @@ -116,6 +116,12 @@ struct ifqueue { struct mtx ifq_mtx; }; +struct ifnet_hw_tsomax { + u_int tsomaxbytes; /* TSO total burst length limit in bytes */ + u_int tsomaxsegcount; /* TSO maximum segment count */ + u_int tsomaxsegsize; /* TSO maximum segment size in bytes */ +}; + /* * Structure defining a network interface. * @@ -204,10 +210,11 @@ struct ifnet { u_int if_fib; /* interface FIB */ u_char if_alloctype; /* if_type at time of allocation */ - u_int if_hw_tsomax; /* tso burst length limit, the minimum - * is (IP_MAXPACKET / 8). - * XXXAO: Have to find a better place - * for it eventually. */ + u_int if_hw_tsomax; /* TSO total burst length + * limit in bytes. A value of + * zero means no limit. Have + * to find a better place for + * it eventually. */ /* * Spare fields are added so that we can modify sensitive data @@ -215,7 +222,14 @@ struct ifnet { * be used with care where binary compatibility is required. */ char if_cspare[3]; - int if_ispare[4]; + int if_ispare[2]; + + /* + * TSO fields for segment limits. If a field is zero below, + * there is no limit: + */ + u_int if_hw_tsomaxsegcount; /* TSO maximum segment count */ + u_int if_hw_tsomaxsegsize; /* TSO maximum segment size in bytes */ void *if_pspare[8]; /* 1 netmap, 7 TDB */ }; @@ -967,6 +981,10 @@ int ether_poll_register(poll_handler_t *h, struct ifnet *ifp); int ether_poll_deregister(struct ifnet *ifp); #endif /* DEVICE_POLLING */ +/* TSO */ +void if_hw_tsomax_common(struct ifnet *, struct ifnet_hw_tsomax *); +int if_hw_tsomax_update(struct ifnet *, struct ifnet_hw_tsomax *); + #endif /* _KERNEL */ #endif /* !_NET_IF_VAR_H_ */ diff --git a/sys/net/if_vlan.c b/sys/net/if_vlan.c index 9d547a652..6a43e370f 100644 --- a/sys/net/if_vlan.c +++ b/sys/net/if_vlan.c @@ -1483,6 +1483,7 @@ vlan_capabilities(struct ifvlan *ifv) { struct ifnet *p = PARENT(ifv); struct ifnet *ifp = ifv->ifv_ifp; + struct ifnet_hw_tsomax hw_tsomax; TRUNK_LOCK_ASSERT(TRUNK(ifv)); @@ -1509,8 +1510,9 @@ vlan_capabilities(struct ifvlan *ifv) * propagate the hardware-assisted flag. TSO on VLANs * does not necessarily require hardware VLAN tagging. */ - if (p->if_hw_tsomax > 0) - ifp->if_hw_tsomax = p->if_hw_tsomax; + memset(&hw_tsomax, 0, sizeof(hw_tsomax)); + if_hw_tsomax_common(p, &hw_tsomax); + if_hw_tsomax_update(ifp, &hw_tsomax); if (p->if_capabilities & IFCAP_VLAN_HWTSO) ifp->if_capabilities |= p->if_capabilities & IFCAP_TSO; if (p->if_capenable & IFCAP_VLAN_HWTSO) { diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c index d8d550a83..92b0d5833 100644 --- a/sys/netinet/tcp_input.c +++ b/sys/netinet/tcp_input.c @@ -3623,6 +3623,8 @@ tcp_mss(struct tcpcb *tp, int offer) if (cap.ifcap & CSUM_TSO) { tp->t_flags |= TF_TSO; tp->t_tsomax = cap.tsomax; + tp->t_tsomaxsegcount = cap.tsomaxsegcount; + tp->t_tsomaxsegsize = cap.tsomaxsegsize; } } diff --git a/sys/netinet/tcp_output.c b/sys/netinet/tcp_output.c index 8abb16d50..c0e22303f 100644 --- a/sys/netinet/tcp_output.c +++ b/sys/netinet/tcp_output.c @@ -774,28 +774,112 @@ tcp_output(struct tcpcb *tp) flags &= ~TH_FIN; if (tso) { + u_int if_hw_tsomax; + u_int if_hw_tsomaxsegcount; + u_int if_hw_tsomaxsegsize; + struct mbuf *mb; + u_int moff; + int max_len; + + /* extract TSO information */ + if_hw_tsomax = tp->t_tsomax; + if_hw_tsomaxsegcount = tp->t_tsomaxsegcount; + if_hw_tsomaxsegsize = tp->t_tsomaxsegsize; + + /* + * Limit a TSO burst to prevent it from + * overflowing or exceeding the maximum length + * allowed by the network interface: + */ KASSERT(ipoptlen == 0, ("%s: TSO can't do IP options", __func__)); /* - * Limit a burst to t_tsomax minus IP, - * TCP and options length to keep ip->ip_len - * from overflowing or exceeding the maximum - * length allowed by the network interface. + * Check if we should limit by maximum payload + * length: */ - if (len > tp->t_tsomax - hdrlen) { - len = tp->t_tsomax - hdrlen; - sendalot = 1; + if (if_hw_tsomax != 0) { + /* compute maximum TSO length */ + max_len = (if_hw_tsomax - hdrlen); + if (max_len <= 0) { + len = 0; + } else if (len > (u_int)max_len) { + sendalot = 1; + len = (u_int)max_len; + } + } + + /* + * Check if we should limit by maximum segment + * size and count: + */ + if (if_hw_tsomaxsegcount != 0 && + if_hw_tsomaxsegsize != 0) { + max_len = 0; + mb = sbsndmbuf(&so->so_snd, off, &moff); + + while (mb != NULL && (u_int)max_len < len) { + u_int mlen; + u_int frags; + + /* + * Get length of mbuf fragment + * and how many hardware frags, + * rounded up, it would use: + */ + mlen = (mb->m_len - moff); + frags = howmany(mlen, + if_hw_tsomaxsegsize); + + /* Handle special case: Zero Length Mbuf */ + if (frags == 0) + frags = 1; + + /* + * Check if the fragment limit + * will be reached or exceeded: + */ + if (frags >= if_hw_tsomaxsegcount) { + max_len += min(mlen, + if_hw_tsomaxsegcount * + if_hw_tsomaxsegsize); + break; + } + max_len += mlen; + if_hw_tsomaxsegcount -= frags; + moff = 0; + mb = mb->m_next; + } + if (max_len <= 0) { + len = 0; + } else if (len > (u_int)max_len) { + sendalot = 1; + len = (u_int)max_len; + } } /* * Prevent the last segment from being - * fractional unless the send sockbuf can - * be emptied. + * fractional unless the send sockbuf can be + * emptied: + */ + max_len = (tp->t_maxopd - optlen); + if ((off + len) < so->so_snd.sb_cc) { + moff = len % (u_int)max_len; + if (moff != 0) { + len -= moff; + sendalot = 1; + } + } + + /* + * In case there are too many small fragments + * don't use TSO: */ - if (sendalot && off + len < so->so_snd.sb_cc) { - len -= len % (tp->t_maxopd - optlen); + if (len <= (u_int)max_len) { + len = (u_int)max_len; sendalot = 1; + tso = 0; } /* diff --git a/sys/netinet/tcp_subr.c b/sys/netinet/tcp_subr.c index 0c1531480..c492de7dc 100644 --- a/sys/netinet/tcp_subr.c +++ b/sys/netinet/tcp_subr.c @@ -1808,6 +1808,8 @@ tcp_maxmtu(struct in_conninfo *inc, struct tcp_ifcap *cap) ifp->if_hwassist & CSUM_TSO) { cap->ifcap |= CSUM_TSO; cap->tsomax = ifp->if_hw_tsomax; + cap->tsomaxsegcount = ifp->if_hw_tsomaxsegcount; + cap->tsomaxsegsize = ifp->if_hw_tsomaxsegsize; } } RTFREE(sro.ro_rt); @@ -1847,6 +1849,8 @@ tcp_maxmtu6(struct in_conninfo *inc, struct tcp_ifcap *cap) ifp->if_hwassist & CSUM_TSO) { cap->ifcap |= CSUM_TSO; cap->tsomax = ifp->if_hw_tsomax; + cap->tsomaxsegcount = ifp->if_hw_tsomaxsegcount; + cap->tsomaxsegsize = ifp->if_hw_tsomaxsegsize; } } RTFREE(sro6.ro_rt); diff --git a/sys/netinet/tcp_var.h b/sys/netinet/tcp_var.h index 10b109688..72bb7aeab 100644 --- a/sys/netinet/tcp_var.h +++ b/sys/netinet/tcp_var.h @@ -208,13 +208,15 @@ struct tcpcb { u_int t_keepintvl; /* interval between keepalives */ u_int t_keepcnt; /* number of keepalives before close */ - u_int t_tsomax; /* tso burst length limit */ + u_int t_tsomax; /* TSO total burst length limit in bytes */ u_int t_pmtud_saved_maxopd; /* pre-blackhole MSS */ u_int t_flags2; /* More tcpcb flags storage */ uint32_t t_ispare[6]; /* 5 UTO, 1 TBD */ void *t_pspare2[4]; /* 1 TCP_SIGNATURE, 3 TBD */ - uint64_t _pad[6]; /* 6 TBD (1-2 CC/RTT?) */ + uint64_t _pad[5]; /* 5 TBD (1-2 CC/RTT?) */ + uint32_t t_tsomaxsegcount; /* TSO maximum segment count */ + uint32_t t_tsomaxsegsize; /* TSO maximum segment size in bytes */ }; /* @@ -342,6 +344,8 @@ struct hc_metrics_lite { /* must stay in sync with hc_metrics */ struct tcp_ifcap { int ifcap; u_int tsomax; + u_int tsomaxsegcount; + u_int tsomaxsegsize; }; #ifndef _NETINET_IN_PCB_H_ diff --git a/sys/ofed/drivers/net/mlx4/en_netdev.c b/sys/ofed/drivers/net/mlx4/en_netdev.c index cd89a22b3..32c9948ff 100644 --- a/sys/ofed/drivers/net/mlx4/en_netdev.c +++ b/sys/ofed/drivers/net/mlx4/en_netdev.c @@ -2106,12 +2106,12 @@ int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port, if (mdev->LSO_support) dev->if_capabilities |= IFCAP_TSO4 | IFCAP_TSO6 | IFCAP_VLAN_HWTSO; -#if 0 + /* set TSO limits so that we don't have to drop TX packets */ dev->if_hw_tsomax = 65536 - (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN); dev->if_hw_tsomaxsegcount = 16; dev->if_hw_tsomaxsegsize = 65536; /* XXX can do up to 4GByte */ -#endif + dev->if_capenable = dev->if_capabilities; dev->if_hwassist = 0; diff --git a/sys/sys/sockbuf.h b/sys/sys/sockbuf.h index 877b5307e..ef80e9c14 100644 --- a/sys/sys/sockbuf.h +++ b/sys/sys/sockbuf.h @@ -158,6 +158,8 @@ int sbreserve_locked(struct sockbuf *sb, u_long cc, struct socket *so, struct thread *td); struct mbuf * sbsndptr(struct sockbuf *sb, u_int off, u_int len, u_int *moff); +struct mbuf * + sbsndmbuf(struct sockbuf *sb, u_int off, u_int *moff); void sbtoxsockbuf(struct sockbuf *sb, struct xsockbuf *xsb); int sbwait(struct sockbuf *sb); int sblock(struct sockbuf *sb, int flags); -- 2.45.0