Re: Call for Test and Review: bwn(4) - another Broadcom Wireless driver

On Fri, Dec 25, 2009 at 12:10:43AM -0500, David Horn wrote:
> On Tue, Dec 22, 2009 at 10:53 PM, Weongyo Jeong <weongyo.jeong_at_gmail.com> wrote:
> > Hello,
> >
> > Now bwn(4) is available at the public and waiting test and review. ?The
> > status of this driver is *alpha* so could make panics, warnings and
> > errors. ?Please let me know if you encounter problems.
> >
> > The following NICs all I have are only tested on the little endian 64bit
> > machine and big endian 32bit machine.
> >
> > ?- Broadcom BCM4306 802.11b/g Wireless
> > ?- Broadcom BCM4318 802.11b/g Wireless
> >
> > I tested basic RX, TX and WPA association as STA mode and checked it
> > worked.
> >
> > As you might know there are still a lot of TODO in the driver so you
> > could see some verbose messages during testing so please ignore or let
> > me know it makes problems.
> >
> > == How to build and load ==
> >
> > ?# cd /usr/src/sys
> > ?# fetch http://people.freebsd.org/~weongyo/bwn_20091222.tar.gz
> > ?# tar xzf bwn_20091222.tar.gz
> > ?# cd modules/ssb
> > ?# make && make install
> > ?# cd ../..
> > ?# cd modules/bwn
> > ?# make && make install
> > ?# cd somewhere
> > ?# fetch http://people.freebsd.org/~weongyo/bwn_ports_20091222.tar.gz
> > ?# tar xzf bwn_ports_20091222.tar.gz
> > ?# cd sysutils/b43-fwcutter
> > ?# make install clean
> > ?# cd ../..
> > ?# cd net/bwn-firmware-kmod
> > ?# make install clean
> > ?#
> > ?# kldload ssb
> > ?# kldload bwn_v4_ucode
> > ?# kldload if_bwn
> >
> > regards,
> > Weongyo Jeong
> 
> I just ran a test of bwn (with additional ssb patch) against a bcm4311
> (b/g) mini pci-e card I had previously used in my Dell laptop.
> 
> Unfortunately, I am getting a reproducible kernel page fault after bwn
> attempts to attach.
> 
> pciconf -lv
> 
> none2_at_pci0:11:0:0:      class=0x028000 card=0x00071028 chip=0x431114e4
> rev=0x01 hdr=0x00
>     vendor     = 'Broadcom Corporation'
>     device     = 'Broadcom Corporation Dell Wireless 1390 WLAN
> Mini-PCI Card (BCM4311)'
>     class      = network
> 
> uname -a
> 
> FreeBSD la 9.0-CURRENT FreeBSD 9.0-CURRENT #7 r200926M: Wed Dec 23
> 18:51:11 EST 2009     root_at_la:/usr/obj/usr/src/sys/DHORN  amd64
> 
> Select data from core.txt:
> 
> Unread portion of the kernel message buffer:
> bwn0: firmware version (rev 410 patch 2160 date 0x751a time 0x7c0a)
> Kernel page fault with the following non-sleepable locks held:
> exclusive sleep mutex bwn0 (network driver) r = 0 (0xffffff0005722610)
> locked _at_ /usr/src/sys/modules/bwn/../../dev/bwn/if_bwn.c:906
> KDB: stack backtrace:
> db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
> _witness_debugger() at _witness_debugger+0x2e
> witness_warn() at witness_warn+0x2c2
> trap() at trap+0x2ce
> calltrap() at calltrap+0x8
> --- trap 0xc, rip = 0xffffffff8127e070, rsp = 0xffffff80406d1a40, rbp
> = 0xffffff80406d1a80 ---
> bwn_dma_setup() at bwn_dma_setup+0x10
> bwn_dma_init() at bwn_dma_init+0x32
> bwn_core_init() at bwn_core_init+0x40f
> bwn_init_locked() at bwn_init_locked+0xae
> bwn_ioctl() at bwn_ioctl+0xff
> taskqueue_run() at taskqueue_run+0x91
> taskqueue_thread_loop() at taskqueue_thread_loop+0x3f
> fork_exit() at fork_exit+0x12a
> fork_trampoline() at fork_trampoline+0xe
> --- trap 0, rip = 0, rsp = 0xffffff80406d1d30, rbp = 0 ---
> 
> 
> Fatal trap 12: page fault while in kernel mode
> cpuid = 1; apic id = 01
> fault virtual address   = 0x0
> fault code              = supervisor read data, page not present
> instruction pointer     = 0x20:0xffffffff8127e070
> stack pointer           = 0x28:0xffffff80406d1a40
> frame pointer           = 0x28:0xffffff80406d1a80
> code segment            = base 0x0, limit 0xfffff, type 0x1b
>                         = DPL 0, pres 1, long 1, def32 0, gran 1
> processor eflags        = interrupt enabled, resume, IOPL = 0
> current process         = 0 (bwn0 taskq)
> lock order reversal: (Giant after non-sleepable)
>  1st 0xffffff0005722610 bwn0 (network driver) _at_
> /usr/src/sys/modules/bwn/../../dev/bwn/if_bwn.c:906
>  2nd 0xffffffff80c56ec0 Giant (Giant) _at_ /usr/src/sys/dev/usb/input/ukbd.c:1594

It looks it's a same bug like others but let me give some times because
I'll be on vacation until next weeks.

I'll post a patch after coming back from holidays.

regards,
Weongyo Jeong