ath11k and vfio-pci support

[James Prestwood]

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

Thanks,

James