Date: Wed, 3 Mar 2010 07:51:45 -0500 From: John Baldwin <jhb@freebsd.org> To: freebsd-current@freebsd.org Cc: Weongyo Jeong <weongyo@freebsd.org>, Miki <miki.bsd@gmail.com> Subject: Re: Call for Test and Review: bwn(4) - another Broadcom Wireless driver Message-ID: <201003030751.45158.jhb@freebsd.org> In-Reply-To: <261c29701003021108w1e6e3bbascf17102a3256e339@mail.gmail.com> References: <20091223035331.GA1293@weongyo> <20100301201254.GG1295@weongyo> <261c29701003021108w1e6e3bbascf17102a3256e339@mail.gmail.com>
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On Tuesday 02 March 2010 2:08:55 pm Miki wrote: > 2010/3/1 Weongyo Jeong <weongyo.jeong@gmail.com>: > > On Sun, Feb 28, 2010 at 08:45:32PM +0100, Miki wrote: > >> Hi, > >> > >> Thanks for the work ! > >> > >> I have some problems here when I try to create a wlan interface : > >> bwn_v4_ucode5: could not load firmware image, error 2 > >> bwn0: the fw file(bwn_v4_ucode5) not found > > > > Did you try to UP the interface withload loading bwn_v4_ucode.ko? If > > yes currently bwn(4) doesn't automatically load firmware module so you > > need to do it by hand. > > > > # kldload bwn_v4_ucode > > OK I have loaded bwn_v4_ucode before if_bwn and it works, > my bad, I should have read the man page more carefully. > > > > > The patch for this is ready to commit and it'll be happened soon. > > > >> I have installed bwn-firmware-kmod from ports but the only files I have in > >> /boot/modules are bwn_v4_lp_ucode.ko and bwn_v4_ucode.ko. So I tried to > >> copy bwn_v4_ucode to bwn_v4_ucode5 and it seems to work : wlan0 is > >> created, I can associate to an open Access Point and obtain a DHCP lease. > >> But if I try to do some network IO (browsing the web) the interface hang > >> (I cannot obtain a lease anymore). > > > > I have a exact same device like you have but I didn't encounter this > > issue. > > > > Are there any messages from bwn(4) when you the interface becomes hang? > > One more question, after the interface hang, does the system be hang > > also? > > I have no messages in the log (appart bwn0: need multicast update callback). > In fact it's not a hang, it happens only with the AP that permits me > to have a web > access. I have another AP (sitting next to me) and I don't have the > same behavior : > I can have and renew my dhcp lease multiple times and configure the AP with its > web interface. With the "buggy" AP I can have a dhcp lease only once and nothing > more. If I destroy and recreate the wlan interface the same thing happens. > I have no such a problem with if_bwi and this AP. > > > > > One thing you can do is that trying the device with PIO mode not DMA > > mode using the following tunable variable: > > > > hw.bwn.usedma > > > > Its default value is 1 to enable DMA operation so if you set it 0, PIO > > mode would be used and could see the message like below: > > > > bwn0: PIO > > > > Could you please test with it? > > > > Setting hw.bwn.usedma=0 in loader.conf make no differences > > by the way, I need to switch from if_bwn to if_bwi to make some test > and post the results here, but I have this error message : > firmware_register: cannot register image bwi_v3_b0g0initvals5, firmware > table full! > is this normal ? Yes, both bwi and bwn use a lot of individual firmware images, so loading both of them probably fills up the static array of firmware table entries. I think there is a constant in subr_firwmare.c you can increase to make the table bigger. -- John Baldwin
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