[tulip-bug] Bizarre tulip receive problem

[Donald Becker]

On Mon, 28 Oct 2002, Gabriele Alberti wrote:

> > Does the board claim to support HomePNA "HPNA"?  (Some ADMtek chips do.)
> 
> I don't really know what are you talking about..how can I find this info?

It would be printed on the box as a major feature.

> > What does 'tulip-diag -aaemmf' report after trying to send a few packets
> > with this driver?
...
> tulip-diag.c:v2.15 9/23/2002 Donald Becker (becker@scyld.com)
>  http://www.scyld.com/diag/index.html
> Index #1: Found a Accton EN1217/EN2242 (ADMtek Comet) adapter at 0x1c00.
> Accton EN1217/EN2242 (ADMtek Comet) chip registers at 0x1c00:
..
>  Comet duplex is reported in the MII status registers.
>  Transmit started, Receive started.
> EEPROM 256 words, 8 address bits.
>   PCI IDs Vendor 1113 Device 1216  Subsystem 1113 2242
>   PCI min_grant 255 max_latency 255.

Grrrr.....

>  MII PHY #1 transceiver registers:
>    1100 786d 001d 2411 05e1 0021 0004 2001

OK, the transceiver thinks it is in full duplex mode, but...

> I repeat anyway, the card *seem to work* as it would..the only weird
> thing is ifconfig output. 

...part the MAC think the chip should be reporting "no carrier".  In
full duplex mode the carrier state should be ignored.

In this case only the 'ifconfig' output is wrong.  (Very annoying, but
mostly harmless.)  I'll see if I can track down a fix.

A similar thing happens with the Conexant chip, but I suspect the
problem sources are unrelated.

-- 
Donald Becker				becker@scyld.com
Scyld Computing Corporation		http://www.scyld.com
410 Severn Ave. Suite 210		Scyld Beowulf cluster system
Annapolis MD 21403			410-990-9993