Date: Mon, 21 Jun 2010 13:20:42 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: freebsd@luftivennad.com Cc: freebsd-mips@FreeBSD.org Subject: Re: AR5416 MAC based ath Message-ID: <20100621.132042.200754750200159567.imp@bsdimp.com> In-Reply-To: <3edb8319ac94c39f912d9c7e8f09aeff.squirrel@webmail.equix.ee> References: <3f993635fc9c54a4d44aa360e26a9be0.squirrel@webmail.equix.ee> <20100621.102045.634347869559339674.imp@bsdimp.com> <3edb8319ac94c39f912d9c7e8f09aeff.squirrel@webmail.equix.ee>
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In message: <3edb8319ac94c39f912d9c7e8f09aeff.squirrel@webmail.equix.ee>
"Ain Tepp" <freebsd@luftivennad.com> writes:
: Hi,
:
: Seems like enabling interface (like ifconfig ath0 up) causes trap. Other
: operations, like setting operational mode works fine.
: If i use "ifconfig ath0 up" i get trap for current ifconfig process pid.
: If i use
: # ifconfig wlan0 up
:
: I get all time pid 0 trap:
:
: Trap cause = 7 (bus error (load or store) - kernel mode)
: [ thread pid 0 tid 100028 ]
: Stopped at platform_start+0x1b10: srl v0,a1,8
: db> bt
: Tracing pid 0 tid 100028 td 0xc0c7b000
: db_trace_thread+30 (?,?,?,?) ra 80055a48 sp c74657b0 sz 24
: 8005592c+11c (0,?,ffffffff,?) ra 8005537c sp c74657c8 sz 32
: 80054fe8+394 (?,?,?,?) ra 8005550c sp c74657e8 sz 168
: db_command_loop+78 (?,?,?,?) ra 80057ca8 sp c7465890 sz 24
: 80057ba0+108 (?,?,?,?) ra 801ace78 sp c74658a8 sz 424
: kdb_trap+108 (?,?,?,?) ra 8037d730 sp c7465a50 sz 32
: trap+1620 (?,?,?,?) ra 803733e0 sp c7465a70 sz 176
: MipsKernGenException+134 (0,deadc0de,a258,c7465c74) ra 80391428 sp
: c7465b20 sz0
: 80391420+8 (?,?,?,?) ra 0 sp c7465be8 sz 0
which routine is this?
Warner
: pid 0
: db>
:
:
: Wbr,
:
: Ain
:
: > In message: <3f993635fc9c54a4d44aa360e26a9be0.squirrel@webmail.equix.ee>
: > "Ain" <freebsd@luftivennad.com> writes:
: > : Hello!
: > :
: > : Last month was here a discussion about AR92XX (with subject line "Trap
: > : when setting up ath0"). Now i have same kind trap, my chip is ar9220. If
: > i
: > : understand correctly, patch for 71xx
: > : (http://people.freebsd.org/~imp/ar71xx_ath_war.diff) contains magic
: > number
: > : AR_RXCFG, what is not defined in ar5416reg.h. Can i use same magic to
: > get
: > : my AR92XX working? If not, maybe some other ideas?
: >
: > The RXCFG bug is reported to only be with the older chipset. Atheros
: > didn't fix that bug in the current generation of processors. The
: > newer, N chipsets don't have this bug. If you're seeing issues, then
: > chances are very good that it is a different problem. My work around
: > likely won't help you much. I'd start by building a kernel with
: > symbols and using the debugger to help you track down the issue. With
: > the WAR I put in, I'd always get a different trap address. Maybe this
: > is something as simple as a driver bug (deref of NULL, say)....
: >
: > Warner
: >
:
:
:
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