[iwn] request to test: linkq, plcp, txrate fixes

[Adrian Chadd]

Just committed it to -HEAD.


-adrian



On 24 October 2013 17:49, Sean Bruno <sean_bruno at yahoo.com> wrote:

> On Thu, 2013-10-24 at 13:04 -0700, Adrian Chadd wrote:
> > Hi!
> >
> > I have a patch against iwn(4):
> >
> >
> http://people.freebsd.org/~adrian/ath/20131024-iwn-1-fix-xmit-rate-plcp-linkq.diff
> >
> > This does a few things:
> >
> > * The multi-rate retry ("link quality" stuff) on iwn is a table, and I
> > think I broke it slightly when I implemented 11n rate control. This
> > disables it for now, at least until I / someone implements a replacement
> > table setup and linkq decision.
> >
> > * get rid of the rate index stuff - it was used to decide a few things
> and
> > it was doing legacy-only rate index lookups. I've just removed it; it's
> not
> > needed.
> >
> > * Teach the raw transmit path to use the new plcp lookup routine that
> sets
> > things up.
> >
> > * Correctly implement 11g protection. Right now it was a bit of a hack
> and
> > it was not correct for 11a or 11n operation.
> >
> > I still get transmit hangs on my 4965 but the "invalid rate" failures
> have
> > disappeared. But for some odd reason, the transmits completed but weren't
> > being marked as failed. I don't yet know why.
> >
> > I'm also not sure why transmit is hanging; sometimes it looks like DMA
> > stalls somehow.
> >
> > So - maybe this'll help with various 11n issues on iwn(4), maybe it
> won't.
> > I'm not sure yet. I'm trying to avoid taking ownership of iwn(4) but I
> > rather dislike the occasional 5100/4965 hangs..
> >
> > Thanks,
> >
> >
> >
> > -adrian
>
> running this now against 11-CURRENT.  No issues noted on my adapter
> (Centrino Advanced-N 6205 [Taylor Peak]).  All seems very good.
>
> I haven't tried it the office though, and that's the one that's the most
> interesting I fear.
>
> sean
>