ath11k and vfio-pci support

[James Prestwood]

On 1/11/24 5:11 AM, Kalle Valo wrote:
> James Prestwood <prestwoj at gmail.com> writes:
>
>> Hi Kalle, Baochen,
>>
>> On 1/11/24 12:16 AM, Kalle Valo wrote:
>>> Baochen Qiang <quic_bqiang at quicinc.com> writes:
>>>
>>>> On 1/10/2024 10:55 PM, James Prestwood wrote:
>>>>> Hi Kalle,
>>>>> On 1/10/24 5:49 AM, Kalle Valo wrote:
>>>>>> James Prestwood <prestwoj at gmail.com> writes:
>>>>>>
>>>>>>>> But I have also no idea what is causing this, I guess we are doing
>>>>>>>> something wrong with the PCI communication? That reminds me, you could
>>>>>>>> try this in case that helps:
>>>>>>>>
>>>>>>>> https://patchwork.kernel.org/project/linux-wireless/patch/20231212031914.47339-1-imguzh@gmail.com/
>>>>>>> Heh, I saw this pop up a day after I sent this and was wondering. Is
>>>>>>> this something I'd need on the host kernel, guest, or both?
>>>>>> On the guest where ath11k is running. I'm not optimistic that this would
>>>>>> solve your issue, I suspect there can be also other bugs, but good to
>>>>>> know if the patch changes anything.
>>>>> Looks the same here, didn't seem to change anything based on the
>>>>> kernel logs.
>>>>>
>>>> Could you try this?
>>>>
>>>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/net/wireless/ath/ath11k/pci.c?id=39564b475ac5a589e6c22c43a08cbd283c295d2c
>>> This reminds me, I assumed James was testing with ath.git master branch
>>> (which has that commit) but I never checked that. So for testing please
>>> always use the master branch to get the latest and greatest ath11k:
>>>
>>> https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git/
>>>
>>> There's a quite long delay from ath.git to official releases.
>> Good to know, and I was not in fact using that branch. Rebuilt from
>> ath.git/master but still roughly the same behavior. There does appear
>> to be more output now though, specifically a firmware crash:
>>
>> [    2.281721] ath11k_pci 0000:00:06.0: failed to receive control
>> response completion, polling..
>> [    2.282101] ip (65) used greatest stack depth: 12464 bytes left
>> [    3.306039] ath11k_pci 0000:00:06.0: Service connect timeout
>> [    3.307588] ath11k_pci 0000:00:06.0: failed to connect to HTT: -110
>> [    3.309286] ath11k_pci 0000:00:06.0: failed to start core: -110
>> [    3.519637] ath11k_pci 0000:00:06.0: firmware crashed: MHI_CB_EE_RDDM
>> [    3.519678] ath11k_pci 0000:00:06.0: ignore reset dev flags 0x4000
>> [    3.627087] ath11k_pci 0000:00:06.0: firmware crashed: MHI_CB_EE_RDDM
>> [    3.627129] ath11k_pci 0000:00:06.0: ignore reset dev flags 0x4000
>> [   13.802105] ath11k_pci 0000:00:06.0: failed to wait wlan mode
>> request (mode 4): -110
>> [   13.802175] ath11k_pci 0000:00:06.0: qmi failed to send wlan mode
>> off: -110
> Ok, that's progress now. Can you try next try the iommu patch[1] we
> talked about earlier? It's already in master-pending branch (along with
> other pending patches) so you can use that branch if you want.
>
> [1] https://patchwork.kernel.org/project/linux-wireless/patch/20231212031914.47339-1-imguzh@gmail.com/

Same result unfortunately, tried both with just [1] applied to ath.git 
and at HEAD of master-pending.

Thanks,

James