invalid vht params rate 1920 100kbps nss 2 mcs 9

[Baochen Qiang]

On 6/26/2024 5:12 PM, Paul Menzel wrote:
> Dear Baochen,
> 
> 
> Thank you for your reply.
> 
> Am 26.06.24 um 10:53 schrieb Baochen Qiang:
> 
>> On 6/18/2024 6:33 PM, Kalle Valo wrote:
>>> + baochen
>>>
>>> James Prestwood <prestwoj at gmail.com> writes:
> 
>>>> On 6/17/24 8:27 AM, Kalle Valo wrote:
>>>>> James Prestwood writes:
> 
>>>>>> On 6/16/24 6:10 AM, Paul Menzel wrote:
> 
>>>>>>> Linux 6.10-rc3 (commit a3e18a540541) logged the warning below when
>>>>>>> connecting to a public WiFi:
>>>>>>>
>>>>>>>       ath10k_pci 0000:3a:00.0: invalid vht params rate 1920 100kbps nss 2 mcs 9
>>>>>>
>>>>>> This has been reported/discussed [1]. It was hinted that there was a
>>>>>> firmware fix for this, but none that I tried got rid of it. I got fed
>>>>>> up enough with the logs filling up with this I patched our kernel to
>>>>>> remove the warning. AFAICT it appears benign (?). Removing the warning
>>>>>> was purely "cosmetic" so other devs stopped complaining about it :)
>>>>>>
>>>>>> [1] https://www.mail-archive.com/ath10k@lists.infradead.org/msg13406.html
>>>>>
>>>>> More reliable link to the discussion:
>>>>>
>>>>> https://lore.kernel.org/ath10k/76a816d983e6c4d636311738396f97971b5523fb.1612915444.git.skhan@linuxfoundation.org/
>>>>>
>>>>> I think we should add this workaround I mentioned in 2021:
>>>>>
>>>>>      "If the firmware still keeps sending invalid rates we should add a
>>>>>       specific check to ignore the known invalid values, but not all of
>>>>>       them."
>>>>>
>>>>>      https://lore.kernel.org/ath10k/87h7mktjgi.fsf@codeaurora.org/
>>>>>
>>>>> I guess that would be mcs == 7 and rate == 1440?
>>>>
>>>> I think its more than this combination (Paul's are different).
>>>
>>> Good point.
>>>
>>>> So how many combinations are we willing to add here? Seems like that
>>>> could get out of hand if there are more than a few invalid
>>>> combinations.
>>>
>>> Yeah, but there haven't been that many different values reported yet,
>>> right? And I expect that ath10k user base will just get smaller in the
>>> future so the chances are that we will get less reports.
>>>
>>>> Would we also want to restrict the workaround to specific
>>>> hardware/firmware?
>>>
>>> Good idea, limiting per hardware would be simple to implement using
>>> hw_params. Of course we could even limit this per firmware version using
>>> enum ath10k_fw_features, but not sure if that's worth all the extra work.
>>>
>>> Baochen, do you know more about this firmware bug? Any suggestions?
>>
>> OK, there are two issues here:
>>
>> 1. invalid HT rate: "ath10k_pci 0000:02:00.0: invalid ht params rate 1440 100kbps nss 2 mcs 7".
>>
>> As commented by Wen quite some time ago, this has been fixed from
>> firmware side, and firmware newer than [ver:241] has the fix
>> included.
> This is the issue from 2021, correct?
> 
>> 2. invaid VHT rate: "ath10k_pci 0000:3a:00.0: invalid vht params rate 1920 100kbps nss 2 mcs 9".
>>
>> After checking with firmware team, I thought this is because there is
>> a mismatch in rate definition between host and firmware: In host, the
>> rate for 'nss 2 mcs 9' is defined as {1560, 1733}, see
>> supported_vht_mcs_rate_nss2[]. While in firmware this is defined as
>> {1730, 1920}. So seems we can update host definition to avoid this
>> issue.
> Looking through the logs since May 2024, I have four different logs:
> 
> 1.  invalid vht params rate 878 100kbps nss 3 mcs 2
which chip are you using when you hit this nss 3 issue? QCA6174 firmware does not support NSS 3 so really weird.

> 2.  invalid vht params rate 960 100kbps nss 1 mcs 9
> 3.  invalid vht params rate 1730 100kbps nss 2 mcs 9
> 4.  invalid vht params rate 1920 100kbps nss 2 mcs 9
OK, these are due to mismatch between host and QCA6174 firmware, we can update host to fix them.

> 
> I believe it’s only happening with Cisco networks. I am happy to test a patch.
> 
> By the way, is the firmware version logged by Linux?
> 
>     ath10k_pci 0000:3a:00.0: qca6174 hw3.2 target 0x05030000 chip_id 0x00340aff sub 1a56:1535
>     ath10k_pci 0000:3a:00.0: kconfig debug 0 debugfs 0 tracing 0 dfs 0 testmode 0
>     ath10k_pci 0000:3a:00.0: firmware ver WLAN.RM.4.4.1-00288- api 6 features wowlan,ignore-otp,mfp crc32 bf907c7c
>     ath10k_pci 0000:3a:00.0: board_file api 2 bmi_id N/A crc32 d2863f91
>     ath10k_pci 0000:3a:00.0: htt-ver 3.87 wmi-op 4 htt-op 3 cal otp max-sta 32 raw 0 hwcrypto 1
> 
> Is it 4.4.1-00288? How can I find the file in `/lib/firmware/`?
> 
> 
> Kind regards,
> 
> Paul