bge(4) on BCM 5752 A02 panic due to media autoselect

[Pyun YongHyeon]

On Thu, Aug 31, 2006 at 11:24:55AM +0800, LI Xin wrote:
 > David Christensen wrote:
 > >> Recently one of my colleagues found that BCM 5752 A02 on Dell Latitude
 > >> D820 would get "panic: invalid ife->ifm_data (0xa) in 
 > >> mii_phy_setmedia".
 > >>  After some investigation I have found that removing BCMR_ANEG from
 > >> mii_capabilities in ukphy.c would work around the problem, 
 > >> and it turns
 > >> out that without explicitly specifying media type, the code 
 > >> will finally
 > >> get to pass the "intentionally invalid index" to mii_phy_setmedia and
 > >> trigger an assertion fail.
 > >>
 > >> I have not tested the situation in -STABLE yet, but it was 
 > >> said to work
 > >> there, though.  Is there anyone can shed some light to me about how to
 > >> debug the issue?  Thanks in advance!
 > >>
 > >> PS. During the debugging I have found that the attached patch can make
 > >> "bge0: firmware handshake timeout" issue disappear from the said chip.
 > >> Because I do not have Broadcom specification at hand I would 
 > >> like to see
 > >> if there is someone to give appropriate review for it.
 > > 
 > > Try the attached patch instead and let me know if it works.  When
 > > FastBoot
 > > is enabled on supported Broadcom controllers it allows the controller to
 > > skip rereading firmware after a reset, allowing the driver to complete 
 > > its initialization more quickly.  The Linux driver specifically disables
 > > FastBoot because it performs some read/write tests to controller memory,
 > > potentially corrupting the firmware, so FastBoot is disabled to insure
 > > an
 > > error free firmware reload.  We don't do the same test so the same
 > > change
 > > isn't necessary.  The patch happens to work because the bge driver
 > > doesn't
 > > perform firmware synchronization correctly, and the firmware initializes
 > > too fast for the driver.
 > 
 > Thank you for the patch.  I have just tested the patch under
 > FreeBSD/i386 -CURRENT and the I can confirm that the firmware timeout
 > goes away.  Will you please commit it?
 > 
 > (Note that the panic still persists, I will try to get brgphy attach to
 > see if things changes).
 > 

It would be great if you can test the brgphy patch. I'll commit the
patch if it work on your box.

-- 
Regards,
Pyun YongHyeon