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From:   Equipe Soft <equipe.soft.isere@gmail.com>
Date:   Fri, 3 Apr 2020 09:42:40 +0200
Message-ID: <CAFb4eQnSAQUCyonaRgnFbi0=GAzSKsCjKCm41cx77=r7dnxyMg@mail.gmail.com>
Subject: Re: Is iwlwifi-9260-th-b0-jf-b0-46.ucode a debug firmware?
To:     Luciano Coelho <luciano.coelho@intel.com>
Cc:     linuxwifi@intel.com, linux-wireless@vger.kernel.org
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Hi there, did you had time to look at this issue? Thanks again.
>
> @team
>
> Le mar. 24 mars 2020 =C3=A0 11:50, Equipe Soft <equipe.soft.isere@gmail.c=
om> a =C3=A9crit :
>>
>> Thanks a lot Luciano for your answer.
>> However something remains a bit strange to me. So let me please ask you =
the following questions:
>>
>> Q5) is it normal that Intel AC9260 firmware size is quite different betw=
een "older" and "newer" versions ?  For example: API46, which includes debu=
g information, is ~1.4MB whereas API38, without debug info, is ~2.5MB (so b=
igger !?)
>>
>> Looking at https://wireless.wiki.kernel.org/en/users/drivers/iwlwifi/cor=
e_release#core_release, I get: "Core43 Last version for 9260 and 9000"
>> Looking at https://wireless.wiki.kernel.org/en/users/drivers/iwlwifi/cor=
e_release#devices_not_maintained_in_mainline, I get : " 9260 (Core43)"
>> But looking at https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/l=
inux-firmware.git/commit/iwlwifi-9260-th-b0-jf-b0-46.ucode?id=3D4bebf45872a=
9818a17e2079118500030a8fa377a, I see: " iwlwifi: update FWs to core47-142 r=
elease"
>>
>> Q6) so previous wiki page says that we shall use driver Core43 release b=
ut we can notice that Intel AC9260 firmware is still updated for Core47 . S=
o which driver version should be used ?
>>
>> Thanks again for your answer.
>> Best regards.
>> @team
>>
>>
>> Le lun. 23 mars 2020 =C3=A0 10:30, Luciano Coelho <luciano.coelho@intel.=
com> a =C3=A9crit :
>>>
>>> Hi,
>>>
>>> On Mon, 2020-03-23 at 10:13 +0100, Equipe Soft wrote:
>>> > Hello, we really wonder if the version of the firmware we use is the =
right one.
>>> > I put Luca Coelho in copy according to his activity on git about
>>> > firmware: thank you for your help Luca.
>>> > Best regards.
>>> > @team.
>>> >
>>> >
>>> > Le ven. 13 mars 2020 =C3=A0 11:05, Equipe Soft
>>> > <equipe.soft.isere@gmail.com> a =C3=A9crit :
>>> > > Hello, do you have any news about the issue?
>>> > > Best regards.
>>> > > @team
>>> > > Le ven. 6 mars 2020 =C3=A0 10:33, Equipe Soft <equipe.soft.isere@gm=
ail.com> a =C3=A9crit :
>>> > > > Hello,
>>> > > > we are using backport-iwlwifi core45 drivers and latest AC9260
>>> > > > firmware binary blob:
>>> > > > latest firmware available in Intel iwlwifi firmware fork:
>>> > > > https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/linux-fir=
mware.git/commit/iwlwifi-9260-th-b0-jf-b0-46.ucode?id=3D4bebf45872a9818a17e=
2079118500030a8fa377a
>>> > > > 2019-11-28 iwlwifi: update FWs to core47-142 release
>>> > > >
>>> > > > At runtime, we noticed these log traces:
>>> > > > iwlwifi 0000:01:00.0: Found debug destination: EXTERNAL_DRAM
>>> > > > iwlwifi 0000:01:00.0: Found debug configuration: 0
>>> > > > iwlwifi 0000:01:00.0: Allocated 0x00400000 bytes for firmware mon=
itor.
>>> > > > So it seems that it is a debug firmware...
>>> > > >
>>> > > > Q0) can you please confirm that we can safely use this debug firm=
ware
>>> > > > in our product ?
>>>
>>> You can use this firmware.  It's a production firmware and not a
>>> debugging version.
>>>
>>>
>>> > > > Q1) is debug mode deliberately enabled in newer firmware or is it=
 an
>>> > > > error (maybe like forgotten to disable it) ?
>>>
>>> It is deliberately enabled.  We enable some debugging options by
>>> default so they can be extracted if needed.
>>>
>>>
>>> > > > Q2) is there an impact on performance with this debug firmware ? =
WiFi
>>> > > > speed/throughput may be reduced or not ?
>>>
>>> No, there isn't any impact on performance.
>>>
>>>
>>> > > > Q3) moreover, can you please confirm whether or not WoWLAN (aka
>>> > > > Wake-on-WLAN) is working with this debug firmware ?
>>>
>>> WoWLAN should work fine with this firmware.
>>>
>>>
>>>
>>> > > > Q4) is WoWLAN working with any AC9260 firmware version ? and any
>>> > > > iwlwifi driver version ?
>>>
>>> It has been supported for many years now.  AC9260 got support for this
>>> from the first version of the driver/FW that were publicly released.
>>>
>>> HTH.
>>>
>>> --
>>> Cheers,
>>> Luca.
>>>