ixgbe: enable existing FreeBSD IPv4 TSO code

* This is not perfect but increases sending speeds up to about 3.5 Gb/s
  by TCP connection

* Total throughput has been measured up to 9.22 Gb/s in the sending
  direction

diff --git a/sys/dev/netif/ixgbe/ixgbe.c b/sys/dev/netif/ixgbe/ixgbe.c
index 26d050b..c07165e 100644 (file)
--- a/sys/dev/netif/ixgbe/ixgbe.c
+++ b/sys/dev/netif/ixgbe/ixgbe.c
@@ -166,9 +166,7 @@ static void     ixgbe_dma_free(struct adapter *, struct ixgbe_dma_alloc *);
 static void    ixgbe_add_rx_process_limit(struct adapter *, const char *,
                    const char *, int *, int);
 static bool    ixgbe_tx_ctx_setup(struct tx_ring *, struct mbuf *);
-#if 0  /* NET_TSO */
 static bool    ixgbe_tso_setup(struct tx_ring *, struct mbuf *, u32 *, u32 *);
-#endif
 static void    ixgbe_set_ivar(struct adapter *, u8, u8, s8);
 static void    ixgbe_configure_ivars(struct adapter *);
 static u8 *    ixgbe_mc_array_itr(struct ixgbe_hw *, u8 **, u32 *);
@@ -1007,12 +1005,10 @@ ixgbe_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr)
                IOCTL_DEBUGOUT("ioctl: SIOCSIFCAP (Set Capabilities)");
                if (mask & IFCAP_HWCSUM)
                        ifp->if_capenable ^= IFCAP_HWCSUM;
-#if 0 /* NET_TSO */
                if (mask & IFCAP_TSO4)
                        ifp->if_capenable ^= IFCAP_TSO4;
                if (mask & IFCAP_TSO6)
                        ifp->if_capenable ^= IFCAP_TSO6;
-#endif
 #if 0 /* NET_LRO */
                if (mask & IFCAP_LRO)
                        ifp->if_capenable ^= IFCAP_LRO;
@@ -1083,10 +1079,8 @@ ixgbe_init_locked(struct adapter *adapter)
 
        /* Set the various hardware offload abilities */
        ifp->if_hwassist = 0;
-#if 0 /* NET_TSO */
        if (ifp->if_capenable & IFCAP_TSO)
                ifp->if_hwassist |= CSUM_TSO;
-#endif
        if (ifp->if_capenable & IFCAP_TXCSUM) {
                ifp->if_hwassist |= (CSUM_TCP | CSUM_UDP);
 #if 0
@@ -1799,7 +1793,6 @@ ixgbe_xmit(struct tx_ring *txr, struct mbuf **m_headp)
        ** this becomes the first descriptor of 
        ** a packet.
        */
-#if 0 /* NET_TSO */
        if (m_head->m_pkthdr.csum_flags & CSUM_TSO) {
                if (ixgbe_tso_setup(txr, m_head, &paylen, &olinfo_status)) {
                        cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
@@ -1809,8 +1802,6 @@ ixgbe_xmit(struct tx_ring *txr, struct mbuf **m_headp)
                } else
                        return (ENXIO);
        } else if (ixgbe_tx_ctx_setup(txr, m_head))
-#endif
-       if (ixgbe_tx_ctx_setup(txr, m_head))
                olinfo_status |= IXGBE_TXD_POPTS_TXSM << 8;
 
 #ifdef IXGBE_IEEE1588
@@ -2604,10 +2595,7 @@ ixgbe_setup_interface(device_t dev, struct adapter *adapter)
         */
        ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header);
 
-#if 0 /* NET_TSO */
        ifp->if_capabilities |= IFCAP_HWCSUM | IFCAP_TSO | IFCAP_VLAN_HWCSUM;
-#endif
-       ifp->if_capabilities |= IFCAP_HWCSUM | IFCAP_VLAN_HWCSUM;
        ifp->if_capabilities |= IFCAP_JUMBO_MTU;
        ifp->if_capabilities |= IFCAP_VLAN_HWTAGGING
 #if 0 /* NET_TSO */
@@ -3337,7 +3325,6 @@ ixgbe_tx_ctx_setup(struct tx_ring *txr, struct mbuf *mp)
  *  adapters using advanced tx descriptors
  *
  **********************************************************************/
-#if 0  /* NET_TSO */
 static bool
 ixgbe_tso_setup(struct tx_ring *txr, struct mbuf *mp, u32 *paylen,
     u32 *olinfo_status)
@@ -3350,9 +3337,11 @@ ixgbe_tso_setup(struct tx_ring *txr, struct mbuf *mp, u32 *paylen,
        u32 mss_l4len_idx = 0, len;
        int ctxd, ehdrlen, ip_hlen, tcp_hlen;
        struct ether_vlan_header *eh;
+#if 0 /* IPv6 TSO */
 #ifdef INET6
        struct ip6_hdr *ip6;
 #endif
+#endif
 #ifdef INET
        struct ip *ip;
 #endif
@@ -3375,6 +3364,7 @@ ixgbe_tso_setup(struct tx_ring *txr, struct mbuf *mp, u32 *paylen,
         /* Ensure we have at least the IP+TCP header in the first mbuf. */
        len = ehdrlen + sizeof(struct tcphdr);
        switch (ntohs(eh_type)) {
+#if 0 /* IPv6 TSO */
 #ifdef INET6
        case ETHERTYPE_IPV6:
                if (mp->m_len < len + sizeof(struct ip6_hdr))
@@ -3389,6 +3379,7 @@ ixgbe_tso_setup(struct tx_ring *txr, struct mbuf *mp, u32 *paylen,
                type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV6;
                break;
 #endif
+#endif
 #ifdef INET
        case ETHERTYPE_IP:
                if (mp->m_len < len + sizeof(struct ip))
@@ -3452,7 +3443,6 @@ ixgbe_tso_setup(struct tx_ring *txr, struct mbuf *mp, u32 *paylen,
        txr->next_avail_desc = ctxd;
        return TRUE;
 }
-#endif
 
 #ifdef IXGBE_FDIR
 /*
@@ -5442,11 +5432,9 @@ ixgbe_add_hw_stats(struct adapter *adapter)
        SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "watchdog_events",
                        CTLFLAG_RD, &adapter->watchdog_events,
                        "Watchdog timeouts");
-#if 0  /* NET_TSO */
        SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "tso_tx",
                        CTLFLAG_RD, &adapter->tso_tx,
                        "TSO");
-#endif
        SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "link_irq",
                        CTLFLAG_RD, &adapter->link_irq,
                        "Link MSIX IRQ Handled");