Re: Problem with new bwn driver on -CURRENT

On Sun, Mar 07, 2010 at 12:05:43AM -0500, Joe Marcus Clarke wrote:
> On Fri, 2010-03-05 at 16:16 -0800, Weongyo Jeong wrote:
> > On Fri, Mar 05, 2010 at 04:44:34PM -0500, Joe Marcus Clarke wrote:
> > > On 3/5/10 3:53 PM, Weongyo Jeong wrote:
> > > > On Thu, Mar 04, 2010 at 12:12:02AM -0500, Joe Marcus Clarke wrote:
> > > >> On Wed, 2010-03-03 at 15:14 -0800, Weongyo Jeong wrote:
> > > >>>> When it occurs again, I will get you the details and the full dmesg.  Do
> > > >>>> you want a verbose dmesg, or a standard one?
> > > >>>
> > > >>> I think a standard one is enough.  Thank you.
> > > >>
> > > >> Here you go.  This is on -CURRENT from about 30 minutes ago.  Thanks for
> > > >> looking into this.
> > > >>
> > > >> http://www.marcuscom.com/downloads/salami.dmesg
> > > > 
> > > > Thank you for dmesg.  It looks using PIO mode is only a way to avoid
> > > > this problem.
> > > > 
> > > > I looked sources and problems of other Broadcom wireless driver for LP
> > > > PHY users.  They also encounters this issue and are trying to solve
> > > > this but no luck and no perfect patch until now.
> > > > 
> > > > Recently AFAIK wireless-test git of linux adopted a patch `gracefully
> > > > convert DMA to PIO mode' to solve it.
> > > > 
> > > > Additionally some guys tolds some success story when they disabled ACPI
> > > > but it looks it's not a perfect solution.
> > > > 
> > > > IIRC you said PIO worked for association with your AP but no further
> > > > traffic.  However I wonder that this is weird for me because paths of
> > > > sending management frames and sending data frames are same.  Could you
> > > > please recheck whether PIO mode worked?  I'll try to test PIO mode on my
> > > > environment again.
> > > 
> > > I can absolutely confirm PIO mode does NOT work with my card.  I tested
> > > on a clean power-up.  The card associates, but does not pass any
> > > traffic.  I do not see the same decryption messages that I do with DMA mode.
> > 
> > OK.  I'd like to see some verbose message from bwn(4) after applying
> > attached patch with email.  Could you please test with it and show me
> > dmesg?
> > 
> > I tested 3 broadcom card whose revisions are 5 and 9 and it looks it's
> > working.
> > 
> > I have one LP PHY device, half MiniPCI-E for laptop, but could not test
> > with this patch because I could not turn on RF; it's connected with
> > desktop using converter MiniPCI-E to PCI-E though normally it looks
> > MiniPCI-E devices are turned on using H/W RF switch.
> 
> Here are two dmesg outputs.  Both were taken with this patch.  One is
> with PIO mode, and the other is with (working) DMA mode.  The names
> indicate which is which.
> 
> http://www.marcuscom.com/downloads/salami_pio.dmesg
> http://www.marcuscom.com/downloads/salami_dma.dmesg

Thank you for dmesg.  It looks you are right that your device in PIO
mode doesn't work.  Specially RX path is weird that it was good until
the status is changed to RUN but after querying DHCP requests (or
another) there were no more RX events (seems no more frames ready).

I think it'd be better to file a PR because I could not test LP PHY
easily and it looks that it takes time to solve this problem.  Could you
please do that?

regards,
Weongyo Jeong