ive had this for 2 years or so. updated to current again.

its been tested on the following:

bnx0 at pci4 dev 0 function 0 "Broadcom BCM5708" rev 0x12: apic 8 int 16
bnx1 at pci13 dev 0 function 0 "Broadcom BCM5708" rev 0x12: apic 8 int 16
bnx0: address 00:1e:4f:1b:26:53
brgphy0 at bnx0 phy 1: BCM5708C 10/100/1000baseT PHY, rev. 6
bnx1: address 00:1e:4f:1b:26:51
brgphy1 at bnx1 phy 1: BCM5708C 10/100/1000baseT PHY, rev. 6

itd be nice to get tests on other variants.

ok?

Index: if_bnx.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/if_bnx.c,v
retrieving revision 1.107
diff -u -p -r1.107 if_bnx.c
--- if_bnx.c    18 Jul 2014 07:11:04 -0000      1.107
+++ if_bnx.c    13 Aug 2014 10:40:24 -0000
@@ -848,6 +848,8 @@ bnx_attachhook(void *xsc)
        sc->bnx_rx_ticks               = 18;
 #endif
 
+       sc->mbuf_alloc_size = BNX_MAX_JUMBO_MRU;
+
        /* Update statistics once every second. */
        sc->bnx_stats_ticks = 1000000 & 0xffff00;
 
@@ -878,6 +880,7 @@ bnx_attachhook(void *xsc)
        ifp->if_ioctl = bnx_ioctl;
        ifp->if_start = bnx_start;
        ifp->if_watchdog = bnx_watchdog;
+       ifp->if_hardmtu = BNX_MAX_JUMBO_MTU;
        IFQ_SET_MAXLEN(&ifp->if_snd, USABLE_TX_BD - 1);
        IFQ_SET_READY(&ifp->if_snd);
        bcopy(sc->eaddr, sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);
@@ -890,8 +893,6 @@ bnx_attachhook(void *xsc)
        ifp->if_capabilities |= IFCAP_VLAN_HWTAGGING;
 #endif
 
-       sc->mbuf_alloc_size = BNX_MAX_MRU;
-
        printf("%s: address %s\n", sc->bnx_dev.dv_xname,
            ether_sprintf(sc->arpcom.ac_enaddr));
 
@@ -2647,8 +2648,8 @@ bnx_dma_alloc(struct bnx_softc *sc)
         * Create DMA maps for the Rx buffer mbufs.
         */
        for (i = 0; i < TOTAL_RX_BD; i++) {
-               if (bus_dmamap_create(sc->bnx_dmatag, BNX_MAX_MRU,
-                   BNX_MAX_SEGMENTS, BNX_MAX_MRU, 0, BUS_DMA_NOWAIT,
+               if (bus_dmamap_create(sc->bnx_dmatag, sc->mbuf_alloc_size,
+                   1, sc->mbuf_alloc_size, 0, BUS_DMA_NOWAIT,
                    &sc->rx_mbuf_map[i])) {
                        printf(": Could not create Rx mbuf %d DMA map!\n", i);
                        rc = ENOMEM;
@@ -3663,10 +3664,10 @@ bnx_get_buf(struct bnx_softc *sc, u_int1
            *prod_bseq);
 
        /* This is a new mbuf allocation. */
-       m = MCLGETI(NULL, M_DONTWAIT, NULL, MCLBYTES);
+       m = MCLGETI(NULL, M_DONTWAIT, NULL, sc->mbuf_alloc_size);
        if (!m)
                return (0);
-       m->m_len = m->m_pkthdr.len = MCLBYTES;
+       m->m_len = m->m_pkthdr.len = sc->mbuf_alloc_size;
        /* the chip aligns the ip header for us, no need to m_adj */
 
        /* Map the mbuf cluster into device memory. */
@@ -3979,6 +3980,16 @@ bnx_init_rx_context(struct bnx_softc *sc
                REG_WR(sc, BNX_MQ_MAP_L2_5, val | BNX_MQ_MAP_L2_5_ARM);
        }
 
+       CTX_WR(sc, GET_CID_ADDR(RX_CID), BNX_L2CTX_RX_PG_BUF_SIZE, 0);
+
+       /* Configure the rx_bd and page chain mbuf cluster size. */
+       val = (sc->mbuf_alloc_size << 16);
+       CTX_WR(sc, GET_CID_ADDR(RX_CID), BNX_L2CTX_RX_PG_BUF_SIZE, val);
+
+       /* Configure the context reserved for jumbo support. */
+       CTX_WR(sc, GET_CID_ADDR(RX_CID), BNX_L2CTX_RX_RBDC_KEY,
+           BNX_L2CTX_RX_RBDC_JUMBO_KEY);
+
        /* Point the hardware to the first page in the chain. */
        val = (u_int32_t)((u_int64_t)sc->rx_bd_chain_paddr[0] >> 32);
        CTX_WR(sc, GET_CID_ADDR(RX_CID), BNX_L2CTX_NX_BDHADDR_HI, val);
@@ -4746,7 +4757,7 @@ bnx_init(void *xsc)
        bnx_set_mac_addr(sc);
 
        /* Calculate and program the Ethernet MRU size. */
-       ether_mtu = BNX_MAX_STD_ETHER_MTU_VLAN;
+       ether_mtu = BNX_MAX_JUMBO_ETHER_MTU;
 
        DBPRINT(sc, BNX_INFO, "%s(): setting MRU = %d\n",
            __FUNCTION__, ether_mtu);
@@ -5134,7 +5145,7 @@ bnx_ioctl(struct ifnet *ifp, u_long comm
 
        case SIOCGIFRXR:
                error = if_rxr_ioctl((struct if_rxrinfo *)ifr->ifr_data,
-                   NULL, MCLBYTES, &sc->rx_ring);
+                   NULL, sc->mbuf_alloc_size, &sc->rx_ring);
                break;
 
        default:

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