svn commit: r223648 - head/sys/dev/gem

[YongHyeon PYUN]

On Thu, Jul 07, 2011 at 11:26:08AM -0500, Nathan Whitehorn wrote:
> On 07/07/11 11:07, Marius Strobl wrote:
> >On Thu, Jul 07, 2011 at 09:34:39AM -0500, Nathan Whitehorn wrote:
> >>This breaks one of my gem devices (chip=0x0021106b) when the controller
> >>is initialized from FreeBSD (netbooting works fine, and the controller
> >>stays working after that), with "cannot disable RX MAC" or "cannot
> >>disable RX MAC or hash filter" messages.
> >Are you positive that it's exactly this revision which breaks things?
> >Actually there was a report from Justin Hibbits that r222135 causing
> >a GMAC to no longer work with similar symptoms, which still is unsolved
> >AFAICT. If it's really r223648 which is causing problems in your case
> >please try to figure out which part is causing that as none of the
> >changes exactly stands out as disruptive, probably best by reverting
> >gem_reset_rx() and gem_setladrf() one by one.
> >
> 
> You're right. r223648 just added the printf(), r222135 is where it began 
> not working.

Yes, I know that. I still have no clue and can't explain how
r222135 can break gem(4). Also note, the "cannot disable RX MAC"
was there before r222135.
One vague guess I have at this moment is that firmware may have put
controller into some deep power save state so the first time
gem_init() is called it may not have fully initialized the
controller. I sent a patch to Justin to check that and waiting for
his reply.

> -Nathan
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