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+.\"	$NetBSD: ex.4,v 1.19 2012/03/13 19:25:40 njoly Exp $
+.\"
+.\" Copyright (c) 1999 The NetBSD Foundation, Inc.
+.\" All rights reserved.
+.\"
+.Dd October 30, 2007
+.Dt EX 4
+.Os
+.Sh NAME
+.Nm ex
+.Nd driver for
+.Tn 3Com
+Fast EtherLink XL (3c900, 3c905, 3c980) and similar
+.Tn PCI
+bus and
+.Tn cardbus
+.Tn Ethernet
+interfaces
+.Sh SYNOPSIS
+.Cd "ex* at cardbus? function ?"
+.Cd "ex* at pci? dev ? function ?"
+.Sh DESCRIPTION
+.Tn 3Com
+.Tn Ethernet
+and
+.Tn Fast Ethernet
+cards supported by the
+.Nm
+driver include:
+.Pp
+.Bl -tag -width "3c900B-COMBO" -compact
+.It 3c450-TX
+10/100 Ethernet
+.It 3c555
+MiniPCI 10/100 Ethernet
+.It 3c575-TX
+Ethernet
+.It 3c575B-TX
+Ethernet
+.It 3c575CT
+Ethernet
+.It 3c656
+MiniPCI 10/100 Ethernet
+.It 3c656B
+MiniPCI 10/100 Ethernet
+.It 3c656C
+MiniPCI 10/100 Ethernet
+.It 3c900-TPO
+Ethernet
+.It 3c900-COMBO
+Ethernet
+.It 3c900B-TPC
+Ethernet
+.It 3c900B-TPO
+Ethernet
+.It 3c900B-COMBO
+Ethernet
+.It 3c905-T4
+10/100 Ethernet
+.It 3c905-TX
+10/100 Ethernet
+.It 3c905B-COMBO
+10/100 Ethernet
+.It 3c905B-FX
+10/100 Ethernet
+.It 3c905B-T4
+10/100 Ethernet
+.It 3c905B-TX
+10/100 Ethernet
+.It 3c905CX-TX
+10/100 Ethernet
+.It 3c980
+Server Adapter 10/100 Ethernet
+.It 3c980C-TXM
+10/100 Ethernet
+.It 3cSOHO100-TX
+10/100 Ethernet
+.El
+.Pp
+All versions of the
+.Tn EtherLink XL
+.Pq except the older 3c900 and 3c905
+support IPv4/TCP/UDP checksumming in hardware.
+The
+.Nm
+driver supports this feature of the chip.
+See
+.Xr ifconfig 8
+for information on how to enable this feature.
+.Sh MEDIA SELECTION
+Some of these network interfaces support the Media Independent Interface
+.Pq Tn MII ,
+a bus which can have at least one arbitrary Physical interface
+.Pq Tn PHY
+chip on it.
+.Nx
+supports
+.Tn MII
+and has separate drivers for many different
+.Tn PHY
+chips, including
+.Xr ukphy 4 ,
+a generic
+.Tn PHY
+driver that can support many
+.Tn PHY
+chips that
+.Nx
+does not yet have a specific driver for.
+.Pp
+Support for the
+.Tn PHY
+found on a given
+.Tn NIC
+must be configured into a
+.Nx
+kernel
+.Xr config 1
+for this driver to work properly in those cases.
+.Pp
+See
+.Xr ifmedia 4 ,
+and
+.Xr mii 4 .
+.Sh DIAGNOSTICS
+.Bl -diag
+.It "%s: adapter failure (%x)"
+.It "%s: can't allocate download descriptors, error = %d"
+.It "%s: can't allocate or map rx buffers"
+.It "%s: can't allocate upload descriptors, error = %d"
+.It "%s: can't create download desc. DMA map, error = %d"
+.It "%s: can't create rx DMA map %d, error = %d"
+.It "%s: can't create tx DMA map %d, error = %d"
+.It "%s: can't create upload desc. DMA map, error = %d"
+.It "%s: can't load download desc. DMA map, error = %d"
+.It "%s: can't load mbuf chain, error = %d"
+.It "%s: can't load rx buffer, error = %d"
+.It "%s: can't load upload desc. DMA map, error = %d"
+.It "%s: can't map download descriptors, error = %d"
+.It "%s: can't map upload descriptors, error = %d"
+.It "%s: fifo underrun (%x) @%d"
+.It "%s: jabber (%x)"
+.It "%s: receive stalled"
+.It "%s: too many segments, "
+.It "%s: uplistptr was 0"
+host too slow to serve incoming packets
+.El
+.Sh SEE ALSO
+.Xr cardbus 4 ,
+.Xr exphy 4 ,
+.Xr ifmedia 4 ,
+.Xr intro 4 ,
+.Xr mii 4 ,
+.Xr pci 4 ,
+.Xr ifconfig 8