Author: jfv
Date: Thu Mar 14 21:39:39 2013
New Revision: 248287
URL: http://svnweb.freebsd.org/changeset/base/248287

Log:
  MFC of the ixgbe driver including the follow revisions:
  
  235547,235964,241616,241646,241856,241885,242403,
  242421,243714,243716,243718,243721,243724,243725,
  243728,243729,243733,243735,243736,243741,243833,
  244514,246128,246482,247035,247056,247822,247823
  
  Note: 246482 includes only the changes in the ixgbe driver
        and the buf_ring supporting code in if_var.h and buf_ring.h
        igb and em will be seperate commits, and non-Intel drivers
        can commit the changes at will.
  
  Reviewed by:rss, jhb

Modified:
  stable/9/sys/dev/ixgbe/LICENSE
  stable/9/sys/dev/ixgbe/ixgbe.c   (contents, props changed)
  stable/9/sys/dev/ixgbe/ixgbe.h
  stable/9/sys/dev/ixgbe/ixgbe_82598.c
  stable/9/sys/dev/ixgbe/ixgbe_82599.c
  stable/9/sys/dev/ixgbe/ixgbe_82599.h
  stable/9/sys/dev/ixgbe/ixgbe_api.c
  stable/9/sys/dev/ixgbe/ixgbe_api.h
  stable/9/sys/dev/ixgbe/ixgbe_common.c
  stable/9/sys/dev/ixgbe/ixgbe_common.h
  stable/9/sys/dev/ixgbe/ixgbe_mbx.h
  stable/9/sys/dev/ixgbe/ixgbe_osdep.h
  stable/9/sys/dev/ixgbe/ixgbe_phy.c
  stable/9/sys/dev/ixgbe/ixgbe_phy.h
  stable/9/sys/dev/ixgbe/ixgbe_type.h
  stable/9/sys/dev/ixgbe/ixgbe_vf.c
  stable/9/sys/dev/ixgbe/ixgbe_vf.h
  stable/9/sys/dev/ixgbe/ixgbe_x540.c
  stable/9/sys/dev/ixgbe/ixgbe_x540.h
  stable/9/sys/dev/ixgbe/ixv.c
  stable/9/sys/net/if_var.h
  stable/9/sys/sys/buf_ring.h
Directory Properties:
  stable/9/sys/dev/ixgbe/   (props changed)
  stable/9/sys/net/   (props changed)
  stable/9/sys/sys/   (props changed)

Modified: stable/9/sys/dev/ixgbe/LICENSE
==============================================================================
--- stable/9/sys/dev/ixgbe/LICENSE      Thu Mar 14 21:21:14 2013        
(r248286)
+++ stable/9/sys/dev/ixgbe/LICENSE      Thu Mar 14 21:39:39 2013        
(r248287)
@@ -1,6 +1,6 @@
 /******************************************************************************
 
-  Copyright (c) 2001-2011, Intel Corporation 
+  Copyright (c) 2001-2013, Intel Corporation 
   All rights reserved.
   
   Redistribution and use in source and binary forms, with or without 

Modified: stable/9/sys/dev/ixgbe/ixgbe.c
==============================================================================
--- stable/9/sys/dev/ixgbe/ixgbe.c      Thu Mar 14 21:21:14 2013        
(r248286)
+++ stable/9/sys/dev/ixgbe/ixgbe.c      Thu Mar 14 21:39:39 2013        
(r248287)
@@ -1,6 +1,6 @@
 /******************************************************************************
 
-  Copyright (c) 2001-2012, Intel Corporation 
+  Copyright (c) 2001-2013, Intel Corporation 
   All rights reserved.
   
   Redistribution and use in source and binary forms, with or without 
@@ -47,7 +47,7 @@ int             ixgbe_display_debug_stat
 /*********************************************************************
  *  Driver version
  *********************************************************************/
-char ixgbe_driver_version[] = "2.4.8";
+char ixgbe_driver_version[] = "2.5.7 - STABLE/9";
 
 /*********************************************************************
  *  PCI Device ID Table
@@ -83,7 +83,7 @@ static ixgbe_vendor_info_t ixgbe_vendor_
        {IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_SFP_SF2, 0, 0, 0},
        {IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_SFP_FCOE, 0, 0, 0},
        {IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599EN_SFP, 0, 0, 0},
-       {IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X540T1, 0, 0, 0},
+       {IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_SFP_SF_QP, 0, 0, 0},
        {IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X540T, 0, 0, 0},
        /* required last entry */
        {0, 0, 0, 0, 0}
@@ -104,16 +104,16 @@ static int      ixgbe_probe(device_t);
 static int      ixgbe_attach(device_t);
 static int      ixgbe_detach(device_t);
 static int      ixgbe_shutdown(device_t);
-#if __FreeBSD_version >= 800000
+#ifdef IXGBE_LEGACY_TX
+static void     ixgbe_start(struct ifnet *);
+static void     ixgbe_start_locked(struct tx_ring *, struct ifnet *);
+#else /* ! IXGBE_LEGACY_TX */
 static int     ixgbe_mq_start(struct ifnet *, struct mbuf *);
 static int     ixgbe_mq_start_locked(struct ifnet *,
                     struct tx_ring *, struct mbuf *);
 static void    ixgbe_qflush(struct ifnet *);
 static void    ixgbe_deferred_mq_start(void *, int);
-#else
-static void     ixgbe_start(struct ifnet *);
-static void     ixgbe_start_locked(struct tx_ring *, struct ifnet *);
-#endif
+#endif /* IXGBE_LEGACY_TX */
 static int      ixgbe_ioctl(struct ifnet *, u_long, caddr_t);
 static void    ixgbe_init(void *);
 static void    ixgbe_init_locked(struct adapter *);
@@ -150,7 +150,7 @@ static void     ixgbe_enable_intr(struct
 static void     ixgbe_disable_intr(struct adapter *);
 static void     ixgbe_update_stats_counters(struct adapter *);
 static bool    ixgbe_txeof(struct tx_ring *);
-static bool    ixgbe_rxeof(struct ix_queue *, int);
+static bool    ixgbe_rxeof(struct ix_queue *);
 static void    ixgbe_rx_checksum(u32, struct mbuf *, u32);
 static void     ixgbe_set_promisc(struct adapter *);
 static void     ixgbe_set_multi(struct adapter *);
@@ -163,10 +163,10 @@ static int        ixgbe_set_thermal_test(SYSCTL
 static int     ixgbe_dma_malloc(struct adapter *, bus_size_t,
                    struct ixgbe_dma_alloc *, int);
 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 *);
-static bool    ixgbe_tso_setup(struct tx_ring *, struct mbuf *, u32 *);
+static int     ixgbe_tx_ctx_setup(struct tx_ring *,
+                   struct mbuf *, u32 *, u32 *);
+static int     ixgbe_tso_setup(struct tx_ring *,
+                   struct mbuf *, u32 *, u32 *);
 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 *);
@@ -181,6 +181,9 @@ static __inline void ixgbe_rx_discard(st
 static __inline void ixgbe_rx_input(struct rx_ring *, struct ifnet *,
                    struct mbuf *, u32);
 
+static void    ixgbe_enable_rx_drop(struct adapter *);
+static void    ixgbe_disable_rx_drop(struct adapter *);
+
 /* Support for pluggable optic modules */
 static bool    ixgbe_sfp_probe(struct adapter *);
 static void    ixgbe_setup_optics(struct adapter *);
@@ -213,7 +216,7 @@ static device_method_t ixgbe_methods[] =
        DEVMETHOD(device_attach, ixgbe_attach),
        DEVMETHOD(device_detach, ixgbe_detach),
        DEVMETHOD(device_shutdown, ixgbe_shutdown),
-       {0, 0}
+       DEVMETHOD_END
 };
 
 static driver_t ixgbe_driver = {
@@ -243,9 +246,13 @@ static int ixgbe_max_interrupt_rate = (4
 TUNABLE_INT("hw.ixgbe.max_interrupt_rate", &ixgbe_max_interrupt_rate);
 
 /* How many packets rxeof tries to clean at a time */
-static int ixgbe_rx_process_limit = 128;
+static int ixgbe_rx_process_limit = 256;
 TUNABLE_INT("hw.ixgbe.rx_process_limit", &ixgbe_rx_process_limit);
 
+/* How many packets txeof tries to clean at a time */
+static int ixgbe_tx_process_limit = 256;
+TUNABLE_INT("hw.ixgbe.tx_process_limit", &ixgbe_tx_process_limit);
+
 /*
 ** Smart speed setting, default to on
 ** this only works as a compile option
@@ -263,15 +270,6 @@ static int ixgbe_enable_msix = 1;
 TUNABLE_INT("hw.ixgbe.enable_msix", &ixgbe_enable_msix);
 
 /*
- * Header split: this causes the hardware to DMA
- * the header into a separate mbuf from the payload,
- * it can be a performance win in some workloads, but
- * in others it actually hurts, its off by default. 
- */
-static int ixgbe_header_split = FALSE;
-TUNABLE_INT("hw.ixgbe.hdr_split", &ixgbe_header_split);
-
-/*
  * Number of Queues, can be set to 0,
  * it then autoconfigures based on the
  * number of cpus with a max of 8. This
@@ -292,6 +290,20 @@ TUNABLE_INT("hw.ixgbe.txd", &ixgbe_txd);
 static int ixgbe_rxd = PERFORM_RXD;
 TUNABLE_INT("hw.ixgbe.rxd", &ixgbe_rxd);
 
+/*
+** HW RSC control: 
+**  this feature only works with
+**  IPv4, and only on 82599 and later.
+**  Also this will cause IP forwarding to
+**  fail and that can't be controlled by
+**  the stack as LRO can. For all these
+**  reasons I've deemed it best to leave
+**  this off and not bother with a tuneable
+**  interface, this would need to be compiled
+**  to enable.
+*/
+static bool ixgbe_rsc_enable = FALSE;
+
 /* Keep running tab on them for sanity check */
 static int ixgbe_total_ports;
 
@@ -533,7 +545,6 @@ ixgbe_attach(device_t dev)
        case IXGBE_ERR_SFP_NOT_SUPPORTED:
                device_printf(dev,"Unsupported SFP+ Module\n");
                error = EIO;
-               device_printf(dev,"Hardware Initialization Failure\n");
                goto err_late;
        case IXGBE_ERR_SFP_NOT_PRESENT:
                device_printf(dev,"No SFP+ Module found\n");
@@ -556,11 +567,6 @@ ixgbe_attach(device_t dev)
        if (ixgbe_setup_interface(dev, adapter) != 0)
                goto err_late;
 
-       /* Sysctl for limiting the amount of work done in the taskqueue */
-       ixgbe_add_rx_process_limit(adapter, "rx_processing_limit",
-           "max number of rx packets to process", &adapter->rx_process_limit,
-           ixgbe_rx_process_limit);
-
        /* Initialize statistics */
        ixgbe_update_stats_counters(adapter);
 
@@ -589,6 +595,9 @@ ixgbe_attach(device_t dev)
                    "PCIE, or x4 PCIE 2 slot is required.\n");
         }
 
+       /* Set an initial default flow control value */
+       adapter->fc =  ixgbe_fc_full;
+
        /* let hardware know driver is loaded */
        ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
        ctrl_ext |= IXGBE_CTRL_EXT_DRV_LOAD;
@@ -645,7 +654,7 @@ ixgbe_detach(device_t dev)
 
        for (int i = 0; i < adapter->num_queues; i++, que++, txr++) {
                if (que->tq) {
-#if __FreeBSD_version >= 800000
+#ifndef IXGBE_LEGACY_TX
                        taskqueue_drain(que->tq, &txr->txq_task);
 #endif
                        taskqueue_drain(que->tq, &que->que_task);
@@ -709,7 +718,7 @@ ixgbe_shutdown(device_t dev)
 }
 
 
-#if __FreeBSD_version < 800000
+#ifdef IXGBE_LEGACY_TX
 /*********************************************************************
  *  Transmit entry point
  *
@@ -728,17 +737,14 @@ ixgbe_start_locked(struct tx_ring *txr, 
 
        IXGBE_TX_LOCK_ASSERT(txr);
 
-       if ((ifp->if_drv_flags & (IFF_DRV_RUNNING|IFF_DRV_OACTIVE)) !=
-           IFF_DRV_RUNNING)
+       if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
                return;
        if (!adapter->link_active)
                return;
 
        while (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) {
-               if (txr->tx_avail <= IXGBE_QUEUE_MIN_FREE) {
-                       txr->queue_status |= IXGBE_QUEUE_DEPLETED;
+               if (txr->tx_avail <= IXGBE_QUEUE_MIN_FREE)
                        break;
-                }
 
                IFQ_DRV_DEQUEUE(&ifp->if_snd, m_head);
                if (m_head == NULL)
@@ -747,8 +753,6 @@ ixgbe_start_locked(struct tx_ring *txr, 
                if (ixgbe_xmit(txr, &m_head)) {
                        if (m_head != NULL)
                                IFQ_DRV_PREPEND(&ifp->if_snd, m_head);
-                       if (txr->tx_avail <= IXGBE_QUEUE_MIN_FREE)
-                               txr->queue_status |= IXGBE_QUEUE_DEPLETED;
                        break;
                }
                /* Send a copy of the frame to the BPF listener */
@@ -781,7 +785,8 @@ ixgbe_start(struct ifnet *ifp)
        return;
 }
 
-#else
+#else /* ! IXGBE_LEGACY_TX */
+
 /*
 ** Multiqueue Transmit driver
 **
@@ -803,8 +808,7 @@ ixgbe_mq_start(struct ifnet *ifp, struct
        txr = &adapter->tx_rings[i];
        que = &adapter->queues[i];
 
-       if (((txr->queue_status & IXGBE_QUEUE_DEPLETED) == 0) &&
-           IXGBE_TX_TRYLOCK(txr)) {
+       if (IXGBE_TX_TRYLOCK(txr)) {
                err = ixgbe_mq_start_locked(ifp, txr, m);
                IXGBE_TX_UNLOCK(txr);
        } else {
@@ -823,7 +827,6 @@ ixgbe_mq_start_locked(struct ifnet *ifp,
         int             enqueued, err = 0;
 
        if (((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) ||
-           (txr->queue_status == IXGBE_QUEUE_DEPLETED) ||
            adapter->link_active == 0) {
                if (m != NULL)
                        err = drbr_enqueue(ifp, txr->br, m);
@@ -831,22 +834,24 @@ ixgbe_mq_start_locked(struct ifnet *ifp,
        }
 
        enqueued = 0;
-       if (m == NULL) {
-               next = drbr_dequeue(ifp, txr->br);
-       } else if (drbr_needs_enqueue(ifp, txr->br)) {
-               if ((err = drbr_enqueue(ifp, txr->br, m)) != 0)
+       if (m != NULL) {
+               err = drbr_enqueue(ifp, txr->br, m);
+               if (err) {
                        return (err);
-               next = drbr_dequeue(ifp, txr->br);
-       } else
-               next = m;
+               }
+       }
 
        /* Process the queue */
-       while (next != NULL) {
+       while ((next = drbr_peek(ifp, txr->br)) != NULL) {
                if ((err = ixgbe_xmit(txr, &next)) != 0) {
-                       if (next != NULL)
-                               err = drbr_enqueue(ifp, txr->br, next);
+                       if (next == NULL) {
+                               drbr_advance(ifp, txr->br);
+                       } else {
+                               drbr_putback(ifp, txr->br, next);
+                       }
                        break;
                }
+               drbr_advance(ifp, txr->br);
                enqueued++;
                /* Send a copy of the frame to the BPF listener */
                ETHER_BPF_MTAP(ifp, next);
@@ -854,16 +859,11 @@ ixgbe_mq_start_locked(struct ifnet *ifp,
                        break;
                if (txr->tx_avail < IXGBE_TX_OP_THRESHOLD)
                        ixgbe_txeof(txr);
-               if (txr->tx_avail < IXGBE_TX_OP_THRESHOLD) {
-                       txr->queue_status |= IXGBE_QUEUE_DEPLETED;
-                       break;
-               }
-               next = drbr_dequeue(ifp, txr->br);
        }
 
        if (enqueued > 0) {
                /* Set watchdog on */
-               txr->queue_status |= IXGBE_QUEUE_WORKING;
+               txr->queue_status = IXGBE_QUEUE_WORKING;
                txr->watchdog_time = ticks;
        }
 
@@ -907,7 +907,7 @@ ixgbe_qflush(struct ifnet *ifp)
        }
        if_qflush(ifp);
 }
-#endif /* __FreeBSD_version >= 800000 */
+#endif /* IXGBE_LEGACY_TX */
 
 /*********************************************************************
  *  Ioctl entry point
@@ -922,6 +922,7 @@ static int
 ixgbe_ioctl(struct ifnet * ifp, u_long command, caddr_t data)
 {
        struct adapter  *adapter = ifp->if_softc;
+       struct ixgbe_hw *hw = &adapter->hw;
        struct ifreq    *ifr = (struct ifreq *) data;
 #if defined(INET) || defined(INET6)
        struct ifaddr *ifa = (struct ifaddr *)data;
@@ -1009,6 +1010,8 @@ ixgbe_ioctl(struct ifnet * ifp, u_long c
                        ifp->if_capenable ^= IFCAP_HWCSUM;
                if (mask & IFCAP_TSO4)
                        ifp->if_capenable ^= IFCAP_TSO4;
+               if (mask & IFCAP_TSO6)
+                       ifp->if_capenable ^= IFCAP_TSO6;
                if (mask & IFCAP_LRO)
                        ifp->if_capenable ^= IFCAP_LRO;
                if (mask & IFCAP_VLAN_HWTAGGING)
@@ -1025,7 +1028,22 @@ ixgbe_ioctl(struct ifnet * ifp, u_long c
                VLAN_CAPABILITIES(ifp);
                break;
        }
-
+       case SIOCGI2C:
+       {
+               struct ixgbe_i2c_req    i2c;
+               IOCTL_DEBUGOUT("ioctl: SIOCGI2C (Get I2C Data)");
+               error = copyin(ifr->ifr_data, &i2c, sizeof(i2c));
+               if (error)
+                       break;
+               if ((i2c.dev_addr != 0xA0) || (i2c.dev_addr != 0xA2)){
+                       error = EINVAL;
+                       break;
+               }
+               hw->phy.ops.read_i2c_byte(hw, i2c.offset,
+                   i2c.dev_addr, i2c.data);
+               error = copyout(&i2c, ifr->ifr_data, sizeof(i2c));
+               break;
+       }
        default:
                IOCTL_DEBUGOUT1("ioctl: UNKNOWN (0x%X)\n", (int)command);
                error = ether_ioctl(ifp, command, data);
@@ -1073,7 +1091,7 @@ ixgbe_init_locked(struct adapter *adapte
 
        /* Set the various hardware offload abilities */
        ifp->if_hwassist = 0;
-       if (ifp->if_capenable & IFCAP_TSO4)
+       if (ifp->if_capenable & IFCAP_TSO)
                ifp->if_hwassist |= CSUM_TSO;
        if (ifp->if_capenable & IFCAP_TXCSUM) {
                ifp->if_hwassist |= (CSUM_TCP | CSUM_UDP);
@@ -1098,7 +1116,7 @@ ixgbe_init_locked(struct adapter *adapte
 
        /*
        ** Determine the correct mbuf pool
-       ** for doing jumbo/headersplit
+       ** for doing jumbo frames
        */
        if (adapter->max_frame_size <= 2048)
                adapter->rx_mbuf_sz = MCLBYTES;
@@ -1294,7 +1312,7 @@ ixgbe_init_locked(struct adapter *adapte
                        tmp = IXGBE_LOW_DV(frame);
                hw->fc.low_water[0] = IXGBE_BT2KB(tmp);
                
-               adapter->fc = hw->fc.requested_mode = ixgbe_fc_full;
+               hw->fc.requested_mode = adapter->fc;
                hw->fc.pause_time = IXGBE_FC_PAUSE;
                hw->fc.send_xon = TRUE;
        }
@@ -1306,7 +1324,6 @@ ixgbe_init_locked(struct adapter *adapte
 
        /* Now inform the stack we're ready */
        ifp->if_drv_flags |= IFF_DRV_RUNNING;
-       ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 
        return;
 }
@@ -1396,10 +1413,10 @@ ixgbe_handle_que(void *context, int pend
        bool            more;
 
        if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
-               more = ixgbe_rxeof(que, adapter->rx_process_limit);
+               more = ixgbe_rxeof(que);
                IXGBE_TX_LOCK(txr);
                ixgbe_txeof(txr);
-#if __FreeBSD_version >= 800000
+#ifndef IXGBE_LEGACY_TX
                if (!drbr_empty(ifp, txr->br))
                        ixgbe_mq_start_locked(ifp, txr, NULL);
 #else
@@ -1444,7 +1461,7 @@ ixgbe_legacy_irq(void *arg)
                return;
        }
 
-       more_rx = ixgbe_rxeof(que, adapter->rx_process_limit);
+       more_rx = ixgbe_rxeof(que);
 
        IXGBE_TX_LOCK(txr);
        do {
@@ -1490,7 +1507,7 @@ ixgbe_msix_que(void *arg)
        ixgbe_disable_queue(adapter, que->msix);
        ++que->irqs;
 
-       more_rx = ixgbe_rxeof(que, adapter->rx_process_limit);
+       more_rx = ixgbe_rxeof(que);
 
        IXGBE_TX_LOCK(txr);
        more_tx = ixgbe_txeof(txr);
@@ -1499,7 +1516,7 @@ ixgbe_msix_que(void *arg)
        ** has anything queued the task gets
        ** scheduled to handle it.
        */
-#if __FreeBSD_version < 800000
+#ifdef IXGBE_LEGACY_TX
        if (!IFQ_DRV_IS_EMPTY(&adapter->ifp->if_snd))
 #else
        if (!drbr_empty(adapter->ifp, txr->br))
@@ -1665,7 +1682,7 @@ ixgbe_media_status(struct ifnet * ifp, s
                        ifmr->ifm_active |= IFM_100_TX | IFM_FDX;
                        break;
                case IXGBE_LINK_SPEED_1GB_FULL:
-                       ifmr->ifm_active |= IFM_1000_T | IFM_FDX;
+                       ifmr->ifm_active |= IFM_1000_SX | IFM_FDX;
                        break;
                case IXGBE_LINK_SPEED_10GB_FULL:
                        ifmr->ifm_active |= adapter->optics | IFM_FDX;
@@ -1724,9 +1741,9 @@ ixgbe_xmit(struct tx_ring *txr, struct m
 {
        struct adapter  *adapter = txr->adapter;
        u32             olinfo_status = 0, cmd_type_len;
-       u32             paylen = 0;
        int             i, j, error, nsegs;
-       int             first, last = 0;
+       int             first;
+       bool            remap = TRUE;
        struct mbuf     *m_head;
        bus_dma_segment_t segs[adapter->num_segs];
        bus_dmamap_t    map;
@@ -1754,74 +1771,58 @@ ixgbe_xmit(struct tx_ring *txr, struct m
        /*
         * Map the packet for DMA.
         */
+retry:
        error = bus_dmamap_load_mbuf_sg(txr->txtag, map,
            *m_headp, segs, &nsegs, BUS_DMA_NOWAIT);
 
-       if (error == EFBIG) {
+       if (__predict_false(error)) {
                struct mbuf *m;
 
-               m = m_defrag(*m_headp, M_DONTWAIT);
-               if (m == NULL) {
-                       adapter->mbuf_defrag_failed++;
-                       m_freem(*m_headp);
-                       *m_headp = NULL;
-                       return (ENOBUFS);
-               }
-               *m_headp = m;
-
-               /* Try it again */
-               error = bus_dmamap_load_mbuf_sg(txr->txtag, map,
-                   *m_headp, segs, &nsegs, BUS_DMA_NOWAIT);
-
-               if (error == ENOMEM) {
-                       adapter->no_tx_dma_setup++;
+               switch (error) {
+               case EFBIG:
+                       /* Try it again? - one try */
+                       if (remap == TRUE) {
+                               remap = FALSE;
+                               m = m_defrag(*m_headp, M_NOWAIT);
+                               if (m == NULL) {
+                                       adapter->mbuf_defrag_failed++;
+                                       m_freem(*m_headp);
+                                       *m_headp = NULL;
+                                       return (ENOBUFS);
+                               }
+                               *m_headp = m;
+                               goto retry;
+                       } else
+                               return (error);
+               case ENOMEM:
+                       txr->no_tx_dma_setup++;
                        return (error);
-               } else if (error != 0) {
-                       adapter->no_tx_dma_setup++;
+               default:
+                       txr->no_tx_dma_setup++;
                        m_freem(*m_headp);
                        *m_headp = NULL;
                        return (error);
                }
-       } else if (error == ENOMEM) {
-               adapter->no_tx_dma_setup++;
-               return (error);
-       } else if (error != 0) {
-               adapter->no_tx_dma_setup++;
-               m_freem(*m_headp);
-               *m_headp = NULL;
-               return (error);
        }
 
        /* Make certain there are enough descriptors */
        if (nsegs > txr->tx_avail - 2) {
                txr->no_desc_avail++;
-               error = ENOBUFS;
-               goto xmit_fail;
+               bus_dmamap_unload(txr->txtag, map);
+               return (ENOBUFS);
        }
        m_head = *m_headp;
 
        /*
        ** Set up the appropriate offload context
-       ** this becomes the first descriptor of 
-       ** a packet.
+       ** this will consume the first descriptor
        */
-       if (m_head->m_pkthdr.csum_flags & CSUM_TSO) {
-               if (ixgbe_tso_setup(txr, m_head, &paylen)) {
-                       cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
-                       olinfo_status |= IXGBE_TXD_POPTS_IXSM << 8;
-                       olinfo_status |= IXGBE_TXD_POPTS_TXSM << 8;
-                       olinfo_status |= paylen << IXGBE_ADVTXD_PAYLEN_SHIFT;
-                       ++adapter->tso_tx;
-               } else
-                       return (ENXIO);
-       } else if (ixgbe_tx_ctx_setup(txr, m_head))
-               olinfo_status |= IXGBE_TXD_POPTS_TXSM << 8;
-
-#ifdef IXGBE_IEEE1588
-        /* This is changing soon to an mtag detection */
-        if (we detect this mbuf has a TSTAMP mtag)
-                cmd_type_len |= IXGBE_ADVTXD_MAC_TSTAMP;
-#endif
+       error = ixgbe_tx_ctx_setup(txr, m_head, &cmd_type_len, &olinfo_status);
+       if (__predict_false(error)) {
+               if (error == ENOBUFS)
+                       *m_headp = NULL;
+               return (error);
+       }
 
 #ifdef IXGBE_FDIR
        /* Do the flow director magic */
@@ -1833,10 +1834,6 @@ ixgbe_xmit(struct tx_ring *txr, struct m
                }
        }
 #endif
-        /* Record payload length */
-       if (paylen == 0)
-               olinfo_status |= m_head->m_pkthdr.len <<
-                   IXGBE_ADVTXD_PAYLEN_SHIFT;
 
        i = txr->next_avail_desc;
        for (j = 0; j < nsegs; j++) {
@@ -1852,13 +1849,9 @@ ixgbe_xmit(struct tx_ring *txr, struct m
                txd->read.cmd_type_len = htole32(txr->txd_cmd |
                    cmd_type_len |seglen);
                txd->read.olinfo_status = htole32(olinfo_status);
-               last = i; /* descriptor that will get completion IRQ */
 
-               if (++i == adapter->num_tx_desc)
+               if (++i == txr->num_desc)
                        i = 0;
-
-               txbuf->m_head = NULL;
-               txbuf->eop_index = -1;
        }
 
        txd->read.cmd_type_len |=
@@ -1867,14 +1860,19 @@ ixgbe_xmit(struct tx_ring *txr, struct m
        txr->next_avail_desc = i;
 
        txbuf->m_head = m_head;
-       /* Swap the dma map between the first and last descriptor */
+       /*
+       ** Here we swap the map so the last descriptor,
+       ** which gets the completion interrupt has the
+       ** real map, and the first descriptor gets the
+       ** unused map from this descriptor.
+       */
        txr->tx_buffers[first].map = txbuf->map;
        txbuf->map = map;
        bus_dmamap_sync(txr->txtag, map, BUS_DMASYNC_PREWRITE);
 
-        /* Set the index of the descriptor that will be marked done */
+        /* Set the EOP descriptor that will be marked done */
         txbuf = &txr->tx_buffers[first];
-       txbuf->eop_index = last;
+       txbuf->eop = txd;
 
         bus_dmamap_sync(txr->txdma.dma_tag, txr->txdma.dma_map,
             BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
@@ -1887,10 +1885,6 @@ ixgbe_xmit(struct tx_ring *txr, struct m
 
        return (0);
 
-xmit_fail:
-       bus_dmamap_unload(txr->txtag, txbuf->map);
-       return (error);
-
 }
 
 static void
@@ -1940,18 +1934,6 @@ ixgbe_set_multi(struct adapter *adapter)
        bzero(mta, sizeof(u8) * IXGBE_ETH_LENGTH_OF_ADDRESS *
            MAX_NUM_MULTICAST_ADDRESSES);
 
-       fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
-       fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
-       if (ifp->if_flags & IFF_PROMISC)
-               fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
-       else if (ifp->if_flags & IFF_ALLMULTI) {
-               fctrl |= IXGBE_FCTRL_MPE;
-               fctrl &= ~IXGBE_FCTRL_UPE;
-       } else
-               fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
-       
-       IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);
-
 #if __FreeBSD_version < 800000
        IF_ADDR_LOCK(ifp);
 #else
@@ -1960,6 +1942,8 @@ ixgbe_set_multi(struct adapter *adapter)
        TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
                if (ifma->ifma_addr->sa_family != AF_LINK)
                        continue;
+               if (mcnt == MAX_NUM_MULTICAST_ADDRESSES)
+                       break;
                bcopy(LLADDR((struct sockaddr_dl *) ifma->ifma_addr),
                    &mta[mcnt * IXGBE_ETH_LENGTH_OF_ADDRESS],
                    IXGBE_ETH_LENGTH_OF_ADDRESS);
@@ -1971,9 +1955,24 @@ ixgbe_set_multi(struct adapter *adapter)
        if_maddr_runlock(ifp);
 #endif
 
-       update_ptr = mta;
-       ixgbe_update_mc_addr_list(&adapter->hw,
-           update_ptr, mcnt, ixgbe_mc_array_itr, TRUE);
+       fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
+       fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
+       if (ifp->if_flags & IFF_PROMISC)
+               fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
+       else if (mcnt >= MAX_NUM_MULTICAST_ADDRESSES ||
+           ifp->if_flags & IFF_ALLMULTI) {
+               fctrl |= IXGBE_FCTRL_MPE;
+               fctrl &= ~IXGBE_FCTRL_UPE;
+       } else
+               fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
+       
+       IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);
+
+       if (mcnt < MAX_NUM_MULTICAST_ADDRESSES) {
+               update_ptr = mta;
+               ixgbe_update_mc_addr_list(&adapter->hw,
+                   update_ptr, mcnt, ixgbe_mc_array_itr, TRUE);
+       }
 
        return;
 }
@@ -2009,13 +2008,11 @@ ixgbe_local_timer(void *arg)
 {
        struct adapter  *adapter = arg;
        device_t        dev = adapter->dev;
-       struct ifnet    *ifp = adapter->ifp;
        struct ix_queue *que = adapter->queues;
        struct tx_ring  *txr = adapter->tx_rings;
-       int             hung, busy, paused;
+       int             hung = 0, paused = 0;
 
        mtx_assert(&adapter->core_mtx, MA_OWNED);
-       hung = busy = paused = 0;
 
        /* Check for pluggable optics */
        if (adapter->sfp_probe)
@@ -2034,27 +2031,18 @@ ixgbe_local_timer(void *arg)
 
        /*
        ** Check the TX queues status
-       **      - central locked handling of OACTIVE
        **      - watchdog only if all queues show hung
        */          
        for (int i = 0; i < adapter->num_queues; i++, que++, txr++) {
-               if ((txr->queue_status & IXGBE_QUEUE_HUNG) &&
+               if ((txr->queue_status == IXGBE_QUEUE_HUNG) &&
                    (paused == 0))
                        ++hung;
-               if (txr->queue_status & IXGBE_QUEUE_DEPLETED)
-                       ++busy;
-               if ((txr->queue_status & IXGBE_QUEUE_IDLE) == 0)
+               else if (txr->queue_status == IXGBE_QUEUE_WORKING)
                        taskqueue_enqueue(que->tq, &que->que_task);
         }
        /* Only truely watchdog if all queues show hung */
         if (hung == adapter->num_queues)
                 goto watchdog;
-       /* Only turn off the stack flow when ALL are depleted */
-        if (busy == adapter->num_queues)
-                ifp->if_drv_flags |= IFF_DRV_OACTIVE;
-        else if ((ifp->if_drv_flags & IFF_DRV_OACTIVE) &&
-            (busy < adapter->num_queues))
-                ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 
 out:
        ixgbe_rearm_queues(adapter, adapter->que_mask);
@@ -2083,7 +2071,6 @@ static void
 ixgbe_update_link_status(struct adapter *adapter)
 {
        struct ifnet    *ifp = adapter->ifp;
-       struct tx_ring *txr = adapter->tx_rings;
        device_t dev = adapter->dev;
 
 
@@ -2104,9 +2091,6 @@ ixgbe_update_link_status(struct adapter 
                                device_printf(dev,"Link is Down\n");
                        if_link_state_change(ifp, LINK_STATE_DOWN);
                        adapter->link_active = FALSE;
-                       for (int i = 0; i < adapter->num_queues;
-                           i++, txr++)
-                               txr->queue_status = IXGBE_QUEUE_IDLE;
                }
        }
 
@@ -2137,7 +2121,6 @@ ixgbe_stop(void *arg)
 
        /* Let the stack know...*/
        ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
-       ifp->if_drv_flags |= IFF_DRV_OACTIVE;
 
        ixgbe_reset_hw(hw);
        hw->adapter_stopped = FALSE;
@@ -2196,7 +2179,7 @@ ixgbe_setup_optics(struct adapter *adapt
 {
        struct ixgbe_hw *hw = &adapter->hw;
        int             layer;
-       
+
        layer = ixgbe_get_supported_physical_layer(hw);
 
        if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_T) {
@@ -2209,6 +2192,11 @@ ixgbe_setup_optics(struct adapter *adapt
                return;
        }
 
+       if (layer & IXGBE_PHYSICAL_LAYER_1000BASE_SX) {
+               adapter->optics = IFM_1000_SX;
+               return;
+       }
+
        if (layer & (IXGBE_PHYSICAL_LAYER_10GBASE_LR |
            IXGBE_PHYSICAL_LAYER_10GBASE_LRM)) {
                adapter->optics = IFM_10G_LR;
@@ -2244,12 +2232,12 @@ ixgbe_setup_optics(struct adapter *adapt
 static int
 ixgbe_allocate_legacy(struct adapter *adapter)
 {
-       device_t dev = adapter->dev;
+       device_t        dev = adapter->dev;
        struct          ix_queue *que = adapter->queues;
-#if __FreeBSD_version >= 800000
+#ifndef IXGBE_LEGACY_TX
        struct tx_ring          *txr = adapter->tx_rings;
 #endif
-       int error, rid = 0;
+       int             error, rid = 0;
 
        /* MSI RID at 1 */
        if (adapter->msix == 1)
@@ -2268,7 +2256,7 @@ ixgbe_allocate_legacy(struct adapter *ad
         * Try allocating a fast interrupt and the associated deferred
         * processing contexts.
         */
-#if __FreeBSD_version >= 800000
+#ifndef IXGBE_LEGACY_TX
        TASK_INIT(&txr->txq_task, 0, ixgbe_deferred_mq_start, txr);
 #endif
        TASK_INIT(&que->que_task, 0, ixgbe_handle_que, que);
@@ -2350,7 +2338,7 @@ ixgbe_allocate_msix(struct adapter *adap
                if (adapter->num_queues > 1)
                        bus_bind_intr(dev, que->res, i);
 
-#if __FreeBSD_version >= 800000
+#ifndef IXGBE_LEGACY_TX
                TASK_INIT(&txr->txq_task, 0, ixgbe_deferred_mq_start, txr);
 #endif
                TASK_INIT(&que->que_task, 0, ixgbe_handle_que, que);
@@ -2596,7 +2584,7 @@ ixgbe_setup_interface(device_t dev, stru
        ifp->if_softc = adapter;
        ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
        ifp->if_ioctl = ixgbe_ioctl;
-#if __FreeBSD_version >= 800000
+#ifndef IXGBE_LEGACY_TX
        ifp->if_transmit = ixgbe_mq_start;
        ifp->if_qflush = ixgbe_qflush;
 #else
@@ -2614,16 +2602,14 @@ ixgbe_setup_interface(device_t dev, stru
         */
        ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header);
 
-       ifp->if_capabilities |= IFCAP_HWCSUM | IFCAP_TSO4 | IFCAP_VLAN_HWCSUM;
+       ifp->if_capabilities |= IFCAP_HWCSUM | IFCAP_TSO | IFCAP_VLAN_HWCSUM;
        ifp->if_capabilities |= IFCAP_JUMBO_MTU;
+       ifp->if_capabilities |= IFCAP_LRO;
        ifp->if_capabilities |= IFCAP_VLAN_HWTAGGING
                             |  IFCAP_VLAN_HWTSO
                             |  IFCAP_VLAN_MTU;
        ifp->if_capenable = ifp->if_capabilities;
 
-       /* Don't enable LRO by default */
-       ifp->if_capabilities |= IFCAP_LRO;
-
        /*
        ** Don't turn this on by default, if vlans are
        ** created on another pseudo device (eg. lagg)
@@ -2672,7 +2658,7 @@ ixgbe_config_link(struct adapter *adapte
                        taskqueue_enqueue(adapter->tq, &adapter->mod_task);
        } else {
                if (hw->mac.ops.check_link)
-                       err = ixgbe_check_link(hw, &autoneg,
+                       err = ixgbe_check_link(hw, &adapter->link_speed,
                            &adapter->link_up, FALSE);
                if (err)
                        goto out;
@@ -2683,8 +2669,8 @@ ixgbe_config_link(struct adapter *adapte
                if (err)
                        goto out;
                if (hw->mac.ops.setup_link)
-                       err = hw->mac.ops.setup_link(hw, autoneg,
-                           negotiate, adapter->link_up);
+                       err = hw->mac.ops.setup_link(hw,
+                           autoneg, adapter->link_up);
        }
 out:
        return;
@@ -2823,6 +2809,7 @@ ixgbe_allocate_queues(struct adapter *ad
                txr = &adapter->tx_rings[i];
                txr->adapter = adapter;
                txr->me = i;
+               txr->num_desc = adapter->num_tx_desc;
 
                /* Initialize the TX side lock */
                snprintf(txr->mtx_name, sizeof(txr->mtx_name), "%s:tx(%d)",
@@ -2846,7 +2833,7 @@ ixgbe_allocate_queues(struct adapter *ad
                        error = ENOMEM;
                        goto err_tx_desc;
                }
-#if __FreeBSD_version >= 800000
+#ifndef IXGBE_LEGACY_TX
                /* Allocate a buf ring */
                txr->br = buf_ring_alloc(IXGBE_BR_SIZE, M_DEVBUF,
                    M_WAITOK, &txr->tx_mtx);
@@ -2869,6 +2856,7 @@ ixgbe_allocate_queues(struct adapter *ad
                /* Set up some basics */
                rxr->adapter = adapter;
                rxr->me = i;
+               rxr->num_desc = adapter->num_rx_desc;
 
                /* Initialize the RX side lock */
                snprintf(rxr->mtx_name, sizeof(rxr->mtx_name), "%s:rx(%d)",
@@ -3014,7 +3002,7 @@ ixgbe_setup_transmit_ring(struct tx_ring
 
        /* Free any existing tx buffers. */
         txbuf = txr->tx_buffers;
-       for (i = 0; i < adapter->num_tx_desc; i++, txbuf++) {
+       for (i = 0; i < txr->num_desc; i++, txbuf++) {
                if (txbuf->m_head != NULL) {
                        bus_dmamap_sync(txr->txtag, txbuf->map,
                            BUS_DMASYNC_POSTWRITE);
@@ -3038,8 +3026,8 @@ ixgbe_setup_transmit_ring(struct tx_ring
                        netmap_load_map(txr->txtag, txbuf->map, NMB(slot + si));
                }
 #endif /* DEV_NETMAP */
-               /* Clear the EOP index */
-               txbuf->eop_index = -1;
+               /* Clear the EOP descriptor pointer */
+               txbuf->eop = NULL;
         }
 
 #ifdef IXGBE_FDIR
@@ -3093,7 +3081,7 @@ ixgbe_initialize_transmit_units(struct a
                       (tdba & 0x00000000ffffffffULL));
                IXGBE_WRITE_REG(hw, IXGBE_TDBAH(i), (tdba >> 32));
                IXGBE_WRITE_REG(hw, IXGBE_TDLEN(i),
-                   adapter->num_tx_desc * sizeof(struct ixgbe_legacy_tx_desc));
+                   adapter->num_tx_desc * sizeof(union ixgbe_adv_tx_desc));
 
                /* Setup the HW Tx Head and Tail descriptor pointers */
                IXGBE_WRITE_REG(hw, IXGBE_TDH(i), 0);
@@ -3103,6 +3091,9 @@ ixgbe_initialize_transmit_units(struct a
                txr->txd_cmd = IXGBE_TXD_CMD_IFCS;
                txr->queue_status = IXGBE_QUEUE_IDLE;
 
+               /* Set the processing limit */
+               txr->process_limit = ixgbe_tx_process_limit;
+
                /* Disable Head Writeback */
                switch (hw->mac.type) {
                case ixgbe_mac_82598EB:
@@ -3204,7 +3195,7 @@ ixgbe_free_transmit_buffers(struct tx_ri
                        tx_buffer->map = NULL;
                }
        }
-#if __FreeBSD_version >= 800000
+#ifdef IXGBE_LEGACY_TX
        if (txr->br != NULL)
                buf_ring_free(txr->br, M_DEVBUF);
 #endif
@@ -3221,43 +3212,49 @@ ixgbe_free_transmit_buffers(struct tx_ri
 
 /*********************************************************************
  *
- *  Advanced Context Descriptor setup for VLAN or CSUM
+ *  Advanced Context Descriptor setup for VLAN, CSUM or TSO
  *
  **********************************************************************/
 
-static bool
-ixgbe_tx_ctx_setup(struct tx_ring *txr, struct mbuf *mp)
+static int
+ixgbe_tx_ctx_setup(struct tx_ring *txr, struct mbuf *mp,
+    u32 *cmd_type_len, u32 *olinfo_status)
 {
-       struct adapter *adapter = txr->adapter;
        struct ixgbe_adv_tx_context_desc *TXD;
-       struct ixgbe_tx_buf        *tx_buffer;
-       u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
        struct ether_vlan_header *eh;
        struct ip *ip;
        struct ip6_hdr *ip6;
-       int  ehdrlen, ip_hlen = 0;
+       u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
+       int     ehdrlen, ip_hlen = 0;
        u16     etype;
        u8      ipproto = 0;
-       bool    offload = TRUE;
-       int ctxd = txr->next_avail_desc;
-       u16 vtag = 0;
-
+       int     offload = TRUE;
+       int     ctxd = txr->next_avail_desc;
+       u16     vtag = 0;
+
+       /* First check if TSO is to be used */
+       if (mp->m_pkthdr.csum_flags & CSUM_TSO)
+               return (ixgbe_tso_setup(txr, mp, cmd_type_len, olinfo_status));
 
        if ((mp->m_pkthdr.csum_flags & CSUM_OFFLOAD) == 0)
                offload = FALSE;
 
-       tx_buffer = &txr->tx_buffers[ctxd];
+       /* Indicate the whole packet as payload when not doing TSO */
+               *olinfo_status |= mp->m_pkthdr.len << IXGBE_ADVTXD_PAYLEN_SHIFT;
+
+       /* Now ready a context descriptor */
        TXD = (struct ixgbe_adv_tx_context_desc *) &txr->tx_base[ctxd];
 
        /*
        ** In advanced descriptors the vlan tag must 
-       ** be placed into the descriptor itself.
+       ** be placed into the context descriptor. Hence
+       ** we need to make one even if not doing offloads.
        */
        if (mp->m_flags & M_VLANTAG) {
                vtag = htole16(mp->m_pkthdr.ether_vtag);
                vlan_macip_lens |= (vtag << IXGBE_ADVTXD_VLAN_SHIFT);
-       } else if (offload == FALSE)
-               return FALSE;
+       } else if (offload == FALSE) /* ... no offload to do */
+               return (0);
 
        /*
         * Determine where frame payload starts.
@@ -3286,6 +3283,7 @@ ixgbe_tx_ctx_setup(struct tx_ring *txr, 
                case ETHERTYPE_IPV6:
                        ip6 = (struct ip6_hdr *)(mp->m_data + ehdrlen);
                        ip_hlen = sizeof(struct ip6_hdr);
+                       /* XXX-BZ this will go badly in case of ext hdrs. */
                        ipproto = ip6->ip6_nxt;
                        type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV6;

*** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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