marvell_cesa fails to register on kirkwood (88F6282)

[Gregory CLEMENT]

Hi JM,
 
 On ven., févr. 05 2016, JM <fijam at archlinux.us> wrote:

> On Fri, Feb 5, 2016 at 4:45 PM, Gregory CLEMENT
> <gregory.clement at free-electrons.com> wrote:
>> Hi JM,
>>
>>  On ven., févr. 05 2016, JM <fijam at archlinux.us> wrote:
>>
>>> On Fri, Feb 5, 2016 at 11:29 AM, Boris Brezillon
>>> <boris.brezillon at free-electrons.com> wrote:
>>>> Jan, Andrew
>>>>
>>>> On Fri, 5 Feb 2016 10:02:46 +0100
>>>> Andrew Lunn <andrew at lunn.ch> wrote:
>>>>
>>>>> On Fri, Feb 05, 2016 at 06:01:18AM +0100, JM wrote:
>>>>> > Hi,
>>>>> >
>>>>> > I am testing marvell_cesa on a kirkwood device (QNAP TS-212p, Marvell
>>>>> > Kirkwood 88F6282, dts: http://pastebin.com/Gk95KFHf ).
>>>>> > As of kernel 4.4 (4.4.0-trunk-kirkwood #1 Debian 4.4-1~exp1) it fails
>>>>> > in the following way:
>>>>> >
>>>>> > modprobe marvell_cesa allhwsupport=1
>>>>> > dmesg | tail -n 1
>>>>> > [ 1057.855091] marvell-cesa: probe of f1030000.crypto failed with error -12
>>>>> >
>>>>> > or:
>>>>> >
>>>>> > modprobe marvell_cesa
>>>>> > dmesg | tail -n 1
>>>>> > [ 9178.399357] marvell-cesa: probe of f1030000.crypto failed with error -524
>>>>> >
>>>>> > With kernel 4.3 it would fail with error -22 on that hardware. There
>>>>> > are scattered reports from other users experiencing the same issue
>>>>> > (1,2,3)
>>>>> >
>>>>> > I wonder if this is a result of an invalid definition of the
>>>>> > crypto-sram in the dts of this SoC, or perhaps some other problem
>>>>> > (PEBKAC included).
>>>>>
>>>>> Hi Jan
>>>>>
>>>>> Do you have SRAM enabled in your kernel configuration. The
>>>>> mvebu_v5_defconfig does not have it, which is a bug really.
>>>>
>>>> Hm, the CRYPTO_DEV_MARVELL_CESA option selects the SRAM one [1].
>>>> Anyway, I also think this error is related to the SRAM (not sure why the
>>>> driver is not able to get the SRAM though).
>>>>
>>>> Best Regards,
>>>>
>>>> Boris
>>>>
>>>> [1]http://lxr.free-electrons.com/source/drivers/crypto/Kconfig#L168
>>>>
>>>>
>>>> --
>>>> Boris Brezillon, Free Electrons
>>>> Embedded Linux and Kernel engineering
>>>> http://free-electrons.com
>>>
>>> Hi,
>>>
>>> Thanks for getting back to me. Indeed, CONFIG_SRAM is enabled, I put
>>> the complete .config here: http://pastebin.com/40eKMJqE
>>>
>>> If there is anything I can do to help squish this bug, please let me
>>> know.
>>
>> How do you get your dts?
>> it seems that you generated it from your dtb (or from /proc).
>>
>> I tried to do the same from arch/arm/boot/dts/kirkwood-ts219-6282.dtb,
>> but the resulting dts is too different for an easy comparison.
>>
>> Could you also provide your dtb, maybe by using the same dtc with the
>> option -s I will manage to get the something easier to compare.
>

> Yes, I simply used dtc -I fs /proc/device-tree to obtain the dts.
>
> Here is the relevant .dtb file : http://heap.ovh/files/kirkwood-ts219-6282.dtb
>

OK so this dtb is exacly the one from the mainline. As most of the CESU
stuff is set in te dtis, we will be able to compare it on the other
kirkwood based board.

Gregory

> Best regards,
> Jan

-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com