Date: Sun, 7 May 1995 14:49:52 +1000 From: Bruce Evans <bde@zeta.org.au> To: julian@ref.tfs.com, mtaylor@gateway.cybernet.com Cc: hackers@FreeBSD.org Subject: Re: lance Ethernet and > 16 Mb RAM failure Message-ID: <199505070449.OAA02283@godzilla.zeta.org.au>
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>> I'm installing 2.0-950412-SNAP on a new system. I've never used the 'lnc' >> ethernet drivers before, and I'm having difficulty getting them stable on a >> system with more than 16 Mb of RAM. >> >looks as if the bounce buffer code in the dma >using routines for non master dma, is broken, >OR maybe they are not using it correctly.... >It sould use it's DMA in much the same way as the floppy driver does, >so that it can guarantee that the DMA will go to a buffer < 16MB >but this may not be the case.. It isn't the case. The TODO list at the start of if_lnc.c says bounce buffer support will be needed for dma'ing to mbufs above 16MB. Bruce
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