linux-kernel - Re: ath12k: REO status on PPC does not work

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Message-ID: <aJ8hQKnlboOLFSkh@FUE-ALEWI-WINX>
Date: Fri, 15 Aug 2025 14:00:00 +0200
From: Alexander Wilhelm <alexander.wilhelm@...termo.com>
To: Sebastian Gottschall <s.gottschall@...wrt.com>
Cc: Jeff Johnson <jjohnson@...nel.org>, ath12k@...ts.infradead.org,
        linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: ath12k: REO status on PPC does not work

Am Fri, Aug 15, 2025 at 12:50:00PM +0200 schrieb Sebastian Gottschall:
> i just can say. the changes i had to make for ath11k to get big endian
> somwhat working where massive. alot of endian handling in ath11k is simply
> not considered. the firmware is little endian and alot of fields must be
> converted to host endian order. but at end end i struggled with dma
> transactions and gave up since it was not resolvable. the patch i made for
> ath11k was massive at the end and ath12k is not much different
> technically ath11k and ath12k can be merged at the end. i dont know why
> there are 2 drivers maintained which are technically very similar at the
> end. alot of patches for ath12k can be applied to ath11k which i do
> sometimes if its a usefull patch. but ath11k itself is abadoned for
> maintainance as it seems (at least if you look for qualcomm supplied
> patches)

Regarding the ath11k driver, sure, if the firmware doesn't handle the swap
correctly, it should be disabled and managed directly in the driver. I’ve
already have a patch for this, spanning over 10K lines, which I plan to
upstream at some point.

In contrast, the ath12k driver performs the swap internally from the beginning.
I only had to make a few minor changes to get a working ping. Some patches are
already in the queue, and others have already been merged upstream.


Best regards
Alexander Wilhelm