BCM4401 Support for FreeBSD
dmlb at dmlb.org
Tue Jul 29 01:48:04 PDT 2003
From: "Terry Lambert" <tlambert2 at mindspring.com>
> Joe Marcus Clarke wrote:
> > On Mon, 2003-07-28 at 12:18, Aeefyu wrote:
> > > i.e. Broadcom 440x NIC support for FreeBSD 4.x and 5.x (as found on
> > > latest Dell's Notebooks - mine is a 8500)
> > >
> > > Would anyone be so kind to enlighten me on the the current status?
> > > Last I heard of developments being made was end of June.
> > This was forwarded to me from Greg Lehey. The dcm driver works okay for
> > me, but I had to hack it for some new bus dma changes. I have noticed a
> > few issues of slowness with it when using it in a more "normal" sense
> > (i.e. using it to read mail, ssh to machines, etc.).
> Most likely, the interactive performance is a result of the RX
> packet coelescing, with a timer set to too long an interval. In
> general, it's probably an easy adjustment to make.
It shouldn't be as I set the RX coalescing timer at the same settings as the
Linux drivers - and it is set to 1 packet.
> I notice that he also says he didn't know what to add into some
> of the timer and media routines, so that could be part of the
> issue as well (e.g. if it's getting wedged and having to unwedge
Nope - no wedging is going on. It's packet aligment issues - either I'm
programming the RX DMA pointers wrong or not adjusting them correctly on
TX is absolutly fine, it can easily max out a 100MB/s link with hardly any
> BTW: As a rule of thumb, if you don't know what to put in a timer
> or media routine, put a printf() there. It will likely annoy
> someone into fixing it. 8-).
Ta - will do when the RX issues are fixed.
> -- Terry
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