Date: Sun, 17 Jan 2021 18:49:01 -0300 From: "Dr. Rolf Jansen" <freebsd-rj@obsigna.com> To: Emmanuel Vadot <manu@bidouilliste.com> Cc: freebsd-arm@freebsd.org Subject: Re: GENERICSD snapshot on a BBB has issues with loading the if_rtwn_usb module Message-ID: <DFBF17C9-935B-48E5-AD20-2F8265780FCD@obsigna.com> In-Reply-To: <20210117174539.43b55379e6a37881589616a8@bidouilliste.com> References: <47700631-2D94-4BA8-9707-9ADD70C99600@obsigna.com> <20210116184333.f91594f9c3505d2c588d9634@bidouilliste.com> <20210116184833.1a3182a20a2b6c727b64bb59@bidouilliste.com> <06F689CA-B781-4CEB-8F8A-B00FAC684DD3@obsigna.com> <20210117174539.43b55379e6a37881589616a8@bidouilliste.com>
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> Am 17.01.2021 um 13:45 schrieb Emmanuel Vadot <manu@bidouilliste.com>:
>=20
> On Sat, 16 Jan 2021 15:11:28 -0300
> "Dr. Rolf Jansen" <freebsd-rj@obsigna.com =
<mailto:freebsd-rj@obsigna.com>> wrote:
>=20
>>> Am 16.01.2021 um 14:48 schrieb Emmanuel Vadot <manu@bidouilliste.com =
<mailto:manu@bidouilliste.com>>:
>>>=20
>>> On Sat, 16 Jan 2021 18:43:33 +0100
>>> Emmanuel Vadot <manu@bidouilliste.com <mailto:manu@bidouilliste.com> =
<mailto:manu@bidouilliste.com <mailto:manu@bidouilliste.com>>> wrote:
>>>=20
>>>> On Sat, 16 Jan 2021 14:08:58 -0300
>>>> "Dr. Rolf Jansen" <freebsd-rj@obsigna.com> wrote:
>>>>=20
>>>>> I updated one of my BBB from an older 13-CURRENT (July 2020) to =
the latest 13-ALPHA1 snapshot from Jan, 14th ? =
GENERICSD-20210114-7ae27c2d6c4-255938.
>>>>>=20
>>>>> I had successfully employed an USB-WLAN dongle based on the =
RTL8188eu chipset. I only added the following into /boot/loader.conf:
>>>>>=20
>>>>> if_rtwn_usb_load=3D"YES"
>>>>>=20
>>>>> By that all dependend modules were loaded automatically in a snap. =
With ALPHA1 this doesn?t work anymore. After hours of troubleshooting, I =
got it working by adding the following into /etc/rc.conf:
>>>>>=20
>>>>> kld_list=3D"if_rtwn_usb"
>>>>>=20
>>>>> The "Loading kernel modules:" takes apprx. 4 seconds, however, =
then the USB-WLAN device is enumerated correctly and it is ready to use. =
This makes me think that this uncommon huge delay is the culprit. I =
checked this with some snapshot thats I had installed already. The issue =
seems to have been introduced together with the switch to GENERICSD. A =
GENERICSD 13-CURRENT from end of December showed this issue already, =
while a BBB-specific snapshot (from November 2020) that I had installed =
on another BBB works as before by loading the modules in =
/boot/loader.conf.
>>>>>=20
>>>>> I don't mind to load the modules by the way of the kld_list =
directive in /etc/rc.conf. However, the unusual long duration of loading =
the module and its dependencies might be an indication for a more =
fundamental issue.
>>>>>=20
>>>>> Please feel free to ask me for doing more tests.=20
>>>>>=20
>>>>> Best regards
>>>>>=20
>>>>> Rolf
>>>>=20
>>>> I can reproduce that on my netbooted BBB.
>>>> The module is correctly loaded :
>>>>=20
>>>> Loading
>>>> kernel... /boot/kernel/kernel text=3D0x1b4 text=3D0x68d638 =
text=3D0x1c84f0
>>>> data=3D0xb4070 data=3D0x0+0x258000 syms=3D[0x4+0xa5ab0+0x4+0x119fd4] =
Loading
>>>> configured modules... /boot/kernel/if_rtwn_usb.ko text=3D0xb960
>>>> text=3D0x62c0 data=3D0x2cc+0x3b syms=3D[0x4+0x3570+0x4+0x293f] =
/boot/entropy
>>>> size=3D0x1000 /etc/hostid
>>>> size=3D0x25 Using DTB provided by EFI at
>>>> 0x87f00000. Kernel entry at
>>>> 0x96e00200... Kernel args:
>>>> (null) =
=20
>>>> ---<<BOOT>>--- =
=20
>>>>=20
>>>> But it isn't loaded anymore after booting :
>>>> root@bbb:~ # kldstat=20
>>>> Id Refs Address Size Name
>>>> 1 1 0xc0000000 d23a8c kernel
>>>>=20
>>>> I don't think it has to do with the switch to GENERICSD, there is =
(at
>>>> least shouldn't be) any difference between the old BBB image and =
the
>>>> GENERICSD one.
>>=20
>> Yes, this might well be a coincidence. I do neither have the last BBB =
specific snapshot nor the first GENERICSD one for testing these against =
each other.
>>=20
>>> Just did a test on my OrangePi One (Allwinner H3 armv7 with 512MB of
>>> RAM) and this is the same.
>>> The problem seems to be module dependancy, loader only loads
>>> if_rtnw_usb but doing a kldload also brings wlan.ko and rtwn.ko
>>=20
>> I can confirm this. And in addition loading the if_rtwn_usb.ko module =
and its dependcies manually also takes now significantly longer compared =
to a manual load on the BBB specific 13-CURRENT from November. Perhaps =
something has been changed in the dependency resolver.
>>=20
>=20
> Fixed in 0f2434ea000e
>=20
> Thanks for reporting.
Unfortunately, this did not resolve the issue. I updated my working copy =
with git pull and verified that your changes made it into my source =
tree. Then I built a new kernel and replaced the original ALPHA1 kernel =
from 2021-01-14 by this new one. The rtwn-modules are still not loaded =
by the if_rtwn_usb_load=3D"YES" directive in /boot/loader.conf.
Best regards
Rolf=
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