Re: [PATCH] ath11k: Fix QCN9074 firmware boot on x86

From: Kalle Valo <kvalo@kernel.org>
To: Tyler Stachecki <stachecki.tyler@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>,
	 Jakub Kicinski <kuba@kernel.org>,
	 "open list\:QUALCOMM ATHEROS ATH11K WIRELESS DRIVER"
	<ath11k@lists.infradead.org>,
	 "open list\:NETWORKING DRIVERS \(WIRELESS\)"
	<linux-wireless@vger.kernel.org>,
	 "open list\:NETWORKING DRIVERS" <netdev@vger.kernel.org>,
	 open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] ath11k: Fix QCN9074 firmware boot on x86
Date: Wed, 02 Nov 2022 07:45:07 +0200	[thread overview]
Message-ID: <87edulvrj0.fsf@kernel.org> (raw)
In-Reply-To: <CAC6wqPXjtkiP8pZ_nTXdZva6JnQLWbW7p+ukyAZO6scF5CR7Rw@mail.gmail.com> (Tyler Stachecki's message of "Tue, 1 Nov 2022 20:51:22 -0400")

Tyler Stachecki <stachecki.tyler@gmail.com> writes:

> On Tue, Nov 1, 2022 at 10:46 AM Kalle Valo <kvalo@kernel.org> wrote:
>>
>> "Tyler J. Stachecki" <stachecki.tyler@gmail.com> writes:
>>
>> > The 2.7.0 series of QCN9074's firmware requests 5 segments
>> > of memory instead of 3 (as in the 2.5.0 series).
>> >
>> > The first segment (11M) is too large to be kalloc'd in one
>> > go on x86 and requires piecemeal 1MB allocations, as was
>> > the case with the prior public firmware (2.5.0, 15M).
>> >
>> > Since f6f92968e1e5, ath11k will break the memory requests,
>> > but only if there were fewer than 3 segments requested by
>> > the firmware. It seems that 5 segments works fine and
>> > allows QCN9074 to boot on x86 with firmware 2.7.0, so
>> > change things accordingly.
>> >
>> > Signed-off-by: Tyler J. Stachecki <stachecki.tyler@gmail.com>
>>
>> Ouch, that's pretty bad. Thanks for fixing this!
>>
>> Does the 2.5.0.1 firmware branch still work with this patch? It's
>> important that we don't break the old firmware.
>>
>> --
>> https://patchwork.kernel.org/project/linux-wireless/list/
>>
>> https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
>
> Yep, tested the patch with all 3 combinations, below:
>
> QCN9074:
> WLAN.HK.2.7.0.1-01744-QCAHKSWPL_SILICONZ-1
> WLAN.HK.2.5.0.1-01208-QCAHKSWPL_SILICONZ-1
>
> WCN6855:
> WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.16

Excellent, I'll add Tested-on tags for these. Thank you again.

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