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From: Christian Lamparter <>
To: Robert Marko <>, Kalle Valo <>
Cc:,,,,,, open list <>
Subject: Re: [PATCH] ath10k: support bus and device specific API 1 BDF selection
Date: Wed, 8 Dec 2021 15:07:24 +0100	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On 08/12/2021 13:21, Robert Marko wrote:
> On Tue, 7 Dec 2021 at 19:06, Kalle Valo <> wrote:
>> Robert Marko <> wrote:
>>> Some ath10k IPQ40xx devices like the MikroTik hAP ac2 and ac3 require the
>>> BDF-s to be extracted from the device storage instead of shipping packaged
>>> API 2 BDF-s.
>>> This is required as MikroTik has started shipping boards that require BDF-s
>>> to be updated, as otherwise their WLAN performance really suffers.
>>> This is however impossible as the devices that require this are release
>>> under the same revision and its not possible to differentiate them from
>>> devices using the older BDF-s.
>>> In OpenWrt we are extracting the calibration data during runtime and we are
>>> able to extract the BDF-s in the same manner, however we cannot package the
>>> BDF-s to API 2 format on the fly and can only use API 1 to provide BDF-s on
>>> the fly.
>>> This is an issue as the ath10k driver explicitly looks only for the
>>> board.bin file and not for something like board-bus-device.bin like it does
>>> for pre-cal data.
>>> Due to this we have no way of providing correct BDF-s on the fly, so lets
>>> extend the ath10k driver to first look for BDF-s in the
>>> board-bus-device.bin format, for example: board-ahb-a800000.wifi.bin
>>> If that fails, look for the default board file name as defined previously.
>>> Signed-off-by: Robert Marko <>
>> Can someone review this, please? I understand the need for this, but the board
>> handling is getting quite complex in ath10k so I'm hesitant.
>> What about QCA6390 and other devices. Will they still work?
> Hi Kalle,
> everything else should just continue working as before unless the
> board-bus-device.bin file
> exists it will just use the current method to fetch the BDF.
> Also, this only applies to API1 BDF-s.
> We are really needing this as currently there are devices with the
> wrong BDF being loaded as
> we have no way of knowing where MikroTik changed it and dynamic
> loading would resolve
> all of that since they are one of the rare vendors that embed the
> BDF-s next to calibration data.

Isn't the only user of this the non-upstreamable rb_hardconfig
mikrotik platform driver? So, in your case the devices in question
needs to setup a detour through the userspace firmware (helper+scripts)
to pull on the sysfs of that mikrotik platform driver? Wouldn't it
be possible to do this more directly?


  reply	other threads:[~2021-12-08 14:07 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-09 22:17 [PATCH] ath10k: support bus and device specific API 1 BDF selection Robert Marko
2021-10-14 11:54 ` Christian Lamparter
2021-10-14 12:01   ` Robert Marko
2021-10-14 13:23     ` Christian Lamparter
2021-12-07 18:06 ` Kalle Valo
2021-12-07 18:09   ` Kalle Valo
2021-12-08 12:21   ` Robert Marko
2021-12-08 14:07     ` Christian Lamparter [this message]
2021-12-17 12:06       ` Robert Marko
2021-12-17 12:25         ` Thibaut
2022-02-02 18:49           ` Robert Marko
2022-02-16 13:38             ` Robert Marko
2022-02-16 21:19               ` Christian Lamparter
2022-02-16 21:55                 ` Thibaut
2022-05-03 15:58                   ` Robert Marko
2022-05-04  7:48                     ` Kalle Valo
2022-05-06  6:19 ` Kalle Valo

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