wifi: assignment of PCI device failed

[Alexander Boettcher]

Hi Johannes,

On 07.12.2017 10:11, Johannes Kliemann wrote:
> Yet this doesn't explain the second error that iwl is timing out waiting
> for the hardware.

as discussed off-line, I could reproduce it on one of our machines. May
you please give the commits of [0] a spin, which solves the issue for
the one machine from us.

Thanks,

Alex.

[0] https://github.com/genodelabs/genode/issues/2620

> 
> Regards,
> Johannes
> 
> Am 05.12.2017 um 17:06 schrieb Johannes Kliemann:
>> Hi Alex,
>>
>> thanks to your hint with Issue #2207 I was able to get the value of res
>> which is 9. What I find interesting is the fact that it now seems to be
>> able to assign the PCI device as you can see in [1].
>>
>>> [platform_drv] wifi_drv -> : assignment of PCI device 4:0.0 succeeded
>>
>> Yet everything else seems to behave as before. The timeout errors still
>> appear and there doesn't seem to be any actual connection attempt.
>>
>> I have built this from [2] which currently incorporates log_core_kernel,
>> NOVA VGA support and benders fix free memory calculation (if this
>> information is useful to you).
>>
>> Regards,
>> Johannes
>>
>> [1]: https://imgur.com/a/osaVJ
>> [2]:
>> https://github.com/jklmnn/genode/tree/8a64415f52df2dee30e8fcd279e16d1b18eb2fb9
>>
>> Am 04.12.2017 um 22:14 schrieb Alexander Boettcher:
>>> Hello,
>>>
>>> On 04.12.2017 10:04, Johannes Kliemann wrote:
>>>> Hi all,
>>>>
>>>> I tried to use the Wifi driver for Intel wifi chips.
>>>> When running the driver I get the following messages:
>>>>
>>>>> [platform_drv] Error: wifi_drv -> : assignment of PCI device 4:0.0
>>>> failed phys=0xf8400000 virt=0x10
>>>> and
>>>>
>>>>> [wifi_drv] [iwl_trans_pcie_grap_nic_access] *WARN* Timeout waiting for
>>>> hardware access (CSR_GP_CNTRL 0xffffffff)
>>>>
>>>> The corresponding run file [1] is explicitly written without any default
>>>> routes. I can only provide a photo of the log output [2] (at least the
>>>> visible part) as I don't have any other debug method yet on this hardware.
>>>>
>>>> I thought that this was a missing route but I couldn't find a related
>>>> message and assigning default routes didn't fix it.
>>>> The error seems to appear in
>>>> repos/base-nova/src/core/pd_session_support.cc:assign_pci returning
>>>> false but I couldn't find out why this happens.
>>>> Does anyone have an idea?
>>>
>>> What is or maybe are the value(s) for the variable 'res' in
>>> repos/base-nova/src/core/pd_session_support.cc:assign_pci ?
>>>
>>
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-- 
Alexander Boettcher
Genode Labs

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