Re: bge(4) on BCM 5752 A02 panic due to media autoselect
- From: LI Xin <delphij@xxxxxxxxxxx>
- Date: Thu, 31 Aug 2006 11:24:55 +0800
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).
Cheers,
--
Xin LI <delphij@xxxxxxxxxxx> http://www.delphij.net/
FreeBSD - The Power to Serve!
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