ath11k and vfio-pci support

[Kalle Valo]

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/

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