Bug 25959

Summary:	pcn driver disables nic after kernel is loaded
Product:	Base System	Reporter:	User Rsimmons <rsimmons>
Component:	kern	Assignee:	freebsd-bugs (Nobody) <bugs>
Status:	Closed FIXED
Severity:	Affects Only Me
Priority:	Normal
Version:	4.2-RELEASE
Hardware:	Any
OS:	Any

Description User Rsimmons 2001-03-21 05:10:02 UTC

During the loading of the kernel the pcn driver disables (?) the network card and renders it useless.

Fix: 

Remove the network cable from the nic during the loading of the kernel during the boot process.  After the boot process plug in the network cable and continue as you were.
How-To-Repeat: Load a kernel with the pcn driver on a IBM Netfinity 5500 with the onboard adapter that is supported by this driver, it will disable the card.

Comment 1 iedowse freebsd_committer

2001-12-02 22:24:14 UTC

State Changed
From-To: open->feedback


Does this still occur? If so, the output of "dmesg" from a kernel 
booted with the verbose (-v) flag might be useful. Does changing 
the media type with the ifconfig "media" command help?

Comment 2 iedowse freebsd_committer

2001-12-02 22:53:16 UTC

State Changed
From-To: feedback->closed


Mail to submitter bounces.

Comment 3 dfilter service freebsd_committer

2006-11-28 05:35:50 UTC

marius      2006-11-28 01:33:18 UTC

  FreeBSD src repository

  Modified files:
    sys/pci              if_pcn.c if_pcnreg.h 
  Log:
  - Clear the PCN_MISC_ASEL bit so the media port can be actually set
    via the PCN_CSR_MODE register. Along with sys/dev/mii/nsphy.c 1.26
    this fixes the case of certain Am79c971-based HP cards and on-board
    ones in IBM machines reporting link but not actually passing any
    traffic. [1]
  - Add support for the internal 10baseT PHY, which actually is used on
    at least said HP cards (together with an external DP83840A in a
    multiple PHYs configuration). With cards that don't make use of this
    internal PHY it'll also show up in FreeBSD but not cause any harm.
    This is still missing support for multiple PHYs configuration using
    the internal 100baseTX and/or HomePNA PHYs together with external
    PHYs or multiple external PHYs though.
  - In pcn_ifmedia_upd() call pcn_reset() as otherwise the Am79C971 of
    at least said HP cards can wedge when switching from the internal
    10baseT PHY to the external PHY. This means that we need to also
    initialize and possibly start the chip again in pcn_ifmedia_upd(),
    which isn't that bad though as for setting the media port the chip
    has to be powered down or stopped anyway and unlike documented
    doesn't take effect until the next initialization.
  
  PR:             27995, 25959, 72966 (likely) [1]
  MFC after:      2 weeks
  
  Revision  Changes    Path
  1.81      +66 -12    src/sys/pci/if_pcn.c
  1.15      +8 -4      src/sys/pci/if_pcnreg.h
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Comment 4 dfilter service freebsd_committer

2007-02-25 19:02:08 UTC

marius      2007-02-25 19:02:01 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_6)
    sys/pci              if_pcn.c if_pcnreg.h 
  Log:
  MFC: if_pcn.c 1.76, 1.81, 1.82; if_pcnreg.h 1.15
  
  - In detach method, move if_free() after bus_teardown_intr().
  - Clear the PCN_MISC_ASEL bit so the media port can be actually set
    via the PCN_CSR_MODE register. Along with sys/dev/mii/nsphy.c 1.23.2.3
    this fixes the case of certain Am79c971-based HP cards and on-board
    ones in IBM machines reporting link but not actually passing any
    traffic. [1]
  - Add support for the internal 10baseT PHY, which actually is used on
    at least said HP cards (together with an external DP83840A in a
    multiple PHYs configuration). With cards that don't make use of this
    internal PHY it'll also show up in FreeBSD but not cause any harm.
    This is still missing support for multiple PHYs configuration using
    the internal 100baseTX and/or HomePNA PHYs together with external
    PHYs or multiple external PHYs though.
  - Allow multiple (external) PHYs with Am79C97{2,6}, which actually
    only support external PHYs (besides not connectable internal ones
    which respond at the usual addresses, but which don't hurt if we
    let them show up) and don't wedge when isolating PHYs. Actually,
    this change special cases limiting PHYs to Am79C97{3,5,8}, for
    which this driver doesn't implement swiching between the internal
    and external PHYs, yet, and Am79C971, where isolating the external
    PHY (at least in case it's a DP83840A) wedges the chip. Together
    with sys/dev/mii/acphy.c rev. 1.16.2.5 this adds support for the
    100baseFX port of AT-2700 series adaptors, which use two AC101,
    one for the copper and one for the fibre port (there might be
    variants which only use one PHY though).
  - In pcn_ifmedia_upd() call pcn_reset() as otherwise the Am79C971 of
    at least said HP cards can wedge when switching from the internal
    10baseT PHY to the external PHY. This means that we need to also
    initialize and possibly start the chip again in pcn_ifmedia_upd(),
    which isn't that bad though as for setting the media port the chip
    has to be powered down or stopped anyway and unlike documented
    doesn't take effect until the next initialization.
  - Don't bother to set if_mtu to ETHERMTU, ether_ifattach() does that.
  
  PR:             27995, 25959, 72966 (likely) [1]
  
  Revision  Changes    Path
  1.69.2.7  +80 -15    src/sys/pci/if_pcn.c
  1.11.2.3  +8 -4      src/sys/pci/if_pcnreg.h
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