Re: [PATCH] Proper perfect filter setup for xircom_tulip_cb.c

Keith Owens (kaos@ocs.com.au)
Wed, 06 Jun 2001 15:55:34 +1000

On Tue, 5 Jun 2001 22:34:05 -0700 (PDT),
Ion Badulescu <ionut@cs.columbia.edu> wrote:
>The reason some CardBus Xircom cards need to be put in promisc mode in
>order to receive packets is because the driver doesn't initialize the
>perfect filter correctly. Although it uses a single Tx descriptor to send
>the initialization data to the card, it doesn't set either of the
>first_segment or last_segment bits in the descriptor. No wonder the
>chipset gets confused...

Nicely spotted. The X3201-3 Software Specification says nothing about
the segment bits for the filter, instead the information is tucked away
in the 21143 PCI/CardBus 10/100Mb/s Ethernet LAN Controller Hardware
Reference Manual. So Xircom have a software specification manual that
does not include the full software spec, oh the horrors.

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